Merge pull request #212 from davidgiven/analysis

Rework the disk response analyser to draw its own graphs
Merge from master.
2025-10-31 11:17:01 -07:00 · 2021-01-15 10:52:44 +01:00 · 2021-01-14 01:24:19 +01:00 · 2021-01-13 20:34:21 +01:00 · 2021-01-13 20:05:13 +01:00 · 2021-01-13 20:01:36 +01:00
318 changed files with 72960 additions and 1956 deletions
--- a/.appveyor.yml
+++ b/.appveyor.yml
@@ -1,6 +1,7 @@
 version: '{branch}.{build}'
 clone_depth: 1
 skip_tags: true
+image: Visual Studio 2019

 environment:
  MSYSTEM: MINGW32
@@ -15,7 +16,7 @@ install:

 build_script:
  - make
-  - zip -9 fluxengine.zip fluxengine.exe brother120tool.exe FluxEngine.cydsn/CortexM3/ARM_GCC_541/Release/FluxEngine.hex
+  - zip -9 fluxengine.zip fluxengine.exe brother120tool.exe brother240tool.exe FluxEngine.cydsn/CortexM3/ARM_GCC_541/Release/FluxEngine.hex

 artifacts:
  - path: fluxengine.zip
--- a/.github/workflows/ccpp.yml
+++ b/.github/workflows/ccpp.yml
@@ -0,0 +1,41 @@
+name: C/C++ CI
+
+on: [push]
+
+jobs:
+  build-linux:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v1
+      with:
+        fetch-depth: 1
+    - name: apt
+      run: sudo apt update && sudo apt install libusb-1.0-0-dev libsqlite3-dev ninja-build
+    - name: make
+      run: make
+
+  build-macos:
+    runs-on: macos-latest
+    steps:
+    - uses: actions/checkout@v1
+      with:
+        fetch-depth: 1
+    - name: brew
+      run: brew install sqlite pkg-config libusb ninja
+    - name: make
+      run: make
+
+#  build-windows:
+#    runs-on: windows-latest
+#    steps:
+#    - uses: numworks/setup-msys2@v1
+#      with:
+#        path-type: inherit
+#    - uses: actions/checkout@v1
+#    - name: pacman
+#      run: |
+#        msys2do pacman -S --noconfirm --needed make ninja mingw-w64-i686-libusb mingw-w64-i686-sqlite3 mingw-w64-i686-zlib mingw-w64-i686-gcc zip
+#    - name: build
+#      run: |
+#        msys2do make
+
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,39 +0,0 @@
-language: shell
-git:
-    depth: 1
-
-matrix:
-    include:
-        -
-            os: linux
-            sudo: false
-            dist: xenial
-            compiler: gcc
-            env: CXX=g++-8
-            script:
-            - make
-        -
-            os: osx
-            osx_image: xcode10.2
-            compiler: clang
-            env:
-            - HOMEBREW_NO_INSTALL_CLEANUP=1
-
-addons:
-    apt:
-        sources:
-        - llvm-toolchain-precise-3.8
-        - ubuntu-toolchain-r-test
-        packages:
-        - ninja-build
-        - libusb-1.0-0-dev
-        - libsqlite3-dev
-        - g++-8
-    homebrew:
-        packages:
-        - ninja
-
-script:
- make
-
-
--- a/FluxEngine.cydsn/CortexM3/ARM_GCC_541/Release/FluxEngine.hex
+++ b/FluxEngine.cydsn/CortexM3/ARM_GCC_541/Release/FluxEngine.hex
@@ -1,246 +1,246 @@
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@@ -4615,12 +4615,12 @@
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 :00000001FF
--- a/FluxEngine.cydsn/FIFOout/FIFOout.v
+++ b/FluxEngine.cydsn/FIFOout/FIFOout.v
@@ -20,33 +20,34 @@ module FIFOout (
 wire [7:0] po;
 assign d = po;

-localparam STATE_WAIT = 1'b0;
-localparam STATE_READ = 1'b1;
+localparam STATE_WAITFORREQ = 0;
+localparam STATE_READFROMFIFO = 1;
+localparam STATE_WAITFORNREQ = 2;

-reg state;
-reg oldreq;
+reg [1:0] state;
+wire readfromfifo;

-assign ack = (state != STATE_READ);
+assign ack = (state == STATE_WAITFORNREQ);
+assign readfromfifo = (state == STATE_READFROMFIFO);

 always @(posedge clk)
 begin
    case (state)
-        STATE_WAIT:
+        /* opcode is not valid; req is low; wait for req to go high. */
+        STATE_WAITFORREQ:
        begin
-            if (!empty)
-            begin
-                if (req && !oldreq)
-                begin
-                    state <= STATE_READ;
-                end
-                oldreq <= req;
-            end
+            if (!empty && req)
+                state <= STATE_READFROMFIFO;
        end
        
-        STATE_READ:
-        begin
-            state <= STATE_WAIT;
-        end
+        /* Fetch a single value from the FIFO. */
+        STATE_READFROMFIFO:
+            state <= STATE_WAITFORNREQ;
+            
+        /* opcode is valid; ack is high. Wait for req to go low. */
+        STATE_WAITFORNREQ:
+            if (!req)
+                state <= STATE_WAITFORREQ;
    endcase
 end
            
@@ -55,11 +56,11 @@ cy_psoc3_dp #(.cy_dpconfig(
    `CS_ALU_OP_PASS, `CS_SRCA_A0, `CS_SRCB_D0,
    `CS_SHFT_OP_PASS, `CS_A0_SRC_NONE, `CS_A1_SRC_NONE,
    `CS_FEEDBACK_DSBL, `CS_CI_SEL_CFGA, `CS_SI_SEL_CFGA,
-    `CS_CMP_SEL_CFGA, /*CFGRAM0: STATE_WAITFORREQ*/
+    `CS_CMP_SEL_CFGA, /*CFGRAM0: idle */
    `CS_ALU_OP_PASS, `CS_SRCA_A0, `CS_SRCB_D0,
    `CS_SHFT_OP_PASS, `CS_A0_SRC___F0, `CS_A1_SRC_NONE,
    `CS_FEEDBACK_DSBL, `CS_CI_SEL_CFGA, `CS_SI_SEL_CFGA,
-    `CS_CMP_SEL_CFGA, /*CFGRAM1: STATE_LOAD*/
+    `CS_CMP_SEL_CFGA, /*CFGRAM1: read from fifo */
    `CS_ALU_OP_PASS, `CS_SRCA_A0, `CS_SRCB_D0,
    `CS_SHFT_OP_PASS, `CS_A0_SRC_NONE, `CS_A1_SRC_NONE,
    `CS_FEEDBACK_DSBL, `CS_CI_SEL_CFGA, `CS_SI_SEL_CFGA,
@@ -102,7 +103,7 @@ cy_psoc3_dp #(.cy_dpconfig(
 )) dp(
        /*  input                   */  .reset(1'b0),
        /*  input                   */  .clk(clk),
-        /*  input   [02:00]         */  .cs_addr({2'b0, state}),
+        /*  input   [02:00]         */  .cs_addr({2'b0, readfromfifo}),
        /*  input                   */  .route_si(1'b0),
        /*  input                   */  .route_ci(1'b0),
        /*  input                   */  .f0_load(1'b0),
--- a/FluxEngine.cydsn/FluxEngine.cydwr
+++ b/FluxEngine.cydsn/FluxEngine.cydwr
@@ -814,7 +814,7 @@
  </Group>
  <Group key="Component">
    <Group key="v1">
-      <Data key="cy_boot" value="cy_boot_v5_80" />
+      <Data key="cy_boot" value="cy_boot_v5_81" />
      <Data key="Em_EEPROM_Dynamic" value="Em_EEPROM_Dynamic_v2_20" />
      <Data key="LIN_Dynamic" value="LIN_Dynamic_v5_0" />
    </Group>
@@ -848,15 +848,18 @@
      <Data key="efd5f185-0c32-4824-ba72-3ceb5356f5a7" value="Clock_1" />
    </Group>
    <Group key="Pin">
+      <Data key="3e1862bb-be82-47b0-9549-7ebfe76b6f7b" value="Pin_2" />
      <Data key="4a398466-709f-4228-9500-96178658e13e" value="RDATA" />
      <Data key="5a3407c1-b434-4438-a7b4-b9dfd2280495" value="MOTEA" />
      <Data key="8d318d8b-cf7b-4b6b-b02c-ab1c5c49d0ba" value="SW1" />
+      <Data key="8fc20a4f-e4d1-44b3-a5d4-546e8628d61e" value="LED" />
      <Data key="12e00eac-69b5-4717-85c8-25ef6b224d4c" value="DEBUG_PINS" />
      <Data key="41e2d8ed-5494-4d8c-8ff7-f4f789cece51" value="REDWC" />
      <Data key="264be2d3-9481-494b-8d9c-c1905a45e9cc" value="FDD" />
      <Data key="472f8fdb-f772-44fb-8897-cc690694237b" value="WDATA" />
      <Data key="736cb12b-c863-43d4-a8f0-42f06023f8b5" value="SIDE1" />
      <Data key="4249c923-fcff-453b-8629-bec6fddd00c1" value="STEP" />
+      <Data key="27315b0e-6a8c-4b7f-be77-73ab434fa803" value="Pin_1" />
      <Data key="1425177d-0d0e-4468-8bcc-e638e5509a9b" value="UartRx" />
      <Data key="a5d987c6-e45b-45b9-ad93-656fab06d720" value="TRK00" />
      <Data key="a93ef5b3-00f4-42c0-8fad-0e275a7e2537" value="MOTEB" />
@@ -868,6 +871,7 @@
      <Data key="c5367cde-21d5-4866-9a32-d16abfea0c61" value="WPT" />
      <Data key="d19368c5-6855-41bb-a9ff-808938abef00" value="INDEX" />
      <Data key="e9f14b5a-b2bf-49b8-98f3-d7b5a43ace8d" value="DRVSB" />
+      <Data key="e16b5ef8-00d3-40a4-bc1c-194983c8eb3d" value="LOW_CURRENT" />
      <Data key="e851a3b9-efb8-48be-bbb8-b303b216c393" value="INDEX300" />
      <Data key="e51063a9-4fad-40c7-a06b-7cc4b137dc18" value="DSKCHG" />
      <Data key="ea7ee228-8b3f-426c-8bb8-cd7a81937769" value="DIR" />
@@ -3962,6 +3966,11 @@
    </Group>
  </Group>
  <Group key="Pin2">
+    <Group key="3e1862bb-be82-47b0-9549-7ebfe76b6f7b">
+      <Group key="0">
+        <Data key="Port Format" value="0,6" />
+      </Group>
+    </Group>
    <Group key="4a398466-709f-4228-9500-96178658e13e">
      <Group key="0">
        <Data key="Port Format" value="1,5" />
@@ -3977,6 +3986,11 @@
        <Data key="Port Format" value="2,2" />
      </Group>
    </Group>
+    <Group key="8fc20a4f-e4d1-44b3-a5d4-546e8628d61e">
+      <Group key="0">
+        <Data key="Port Format" value="2,1" />
+      </Group>
+    </Group>
    <Group key="12e00eac-69b5-4717-85c8-25ef6b224d4c">
      <Group key="0">
        <Data key="Port Format" value="2,2" />
@@ -4058,6 +4072,11 @@
        <Data key="Port Format" value="1,0" />
      </Group>
    </Group>
+    <Group key="27315b0e-6a8c-4b7f-be77-73ab434fa803">
+      <Group key="0">
+        <Data key="Port Format" value="0,7" />
+      </Group>
+    </Group>
    <Group key="1425177d-0d0e-4468-8bcc-e638e5509a9b">
      <Group key="0">
        <Data key="Port Format" value="12,6" />
@@ -4143,6 +4162,11 @@
        <Data key="Port Format" value="12,3" />
      </Group>
    </Group>
+    <Group key="e16b5ef8-00d3-40a4-bc1c-194983c8eb3d">
+      <Group key="0">
+        <Data key="Port Format" value="3,2" />
+      </Group>
+    </Group>
    <Group key="e851a3b9-efb8-48be-bbb8-b303b216c393">
      <Group key="0">
        <Data key="Port Format" value="3,0" />
--- a/FluxEngine.cydsn/FluxEngine.cyprj
+++ b/FluxEngine.cydsn/FluxEngine.cyprj
@@ -39,20 +39,6 @@
 <build_action v="HEADER;;;;" />
 <PropertyDeltas />
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-<CyGuid_8b8ab257-35d3-4473-b57b-36315200b38b type_name="CyDesigner.Common.ProjMgmt.Model.CyPrjMgmtFileSerialize" version="3" xml_contents_version="1">
-<CyGuid_31768f72-0253-412b-af77-e7dba74d1330 type_name="CyDesigner.Common.ProjMgmt.Model.CyPrjMgmtItemSerialize" version="2" name="crunch.c" persistent="..\lib\common\crunch.c">
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+<Hidden v="True" />
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+<Hidden v="True" />
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+<Hidden v="True" />
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-<Hidden v="False" />
+<Hidden v="True" />
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+<CyGuid_31768f72-0253-412b-af77-e7dba74d1330 type_name="CyDesigner.Common.ProjMgmt.Model.CyPrjMgmtItemSerialize" version="2" name="TK43_REG.h" persistent="Generated_Source\PSoC5\TK43_REG.h">
+<Hidden v="False" />
+</CyGuid_31768f72-0253-412b-af77-e7dba74d1330>
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+<Hidden v="False" />
+</CyGuid_31768f72-0253-412b-af77-e7dba74d1330>
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+</CyGuid_0820c2e7-528d-4137-9a08-97257b946089>
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+<CyGuid_0820c2e7-528d-4137-9a08-97257b946089 type_name="CyDesigner.Common.ProjMgmt.Model.CyPrjMgmtItemListSerialize" version="2">
+<dependencies>
+<CyGuid_8b8ab257-35d3-4473-b57b-36315200b38b type_name="CyDesigner.Common.ProjMgmt.Model.CyPrjMgmtFileSerialize" version="3" xml_contents_version="1">
+<CyGuid_31768f72-0253-412b-af77-e7dba74d1330 type_name="CyDesigner.Common.ProjMgmt.Model.CyPrjMgmtItemSerialize" version="2" name="TK43_aliases.h" persistent="Generated_Source\PSoC5\TK43_aliases.h">
+<Hidden v="False" />
+</CyGuid_31768f72-0253-412b-af77-e7dba74d1330>
+<build_action v="HEADER;;;;" />
+<PropertyDeltas />
+</CyGuid_8b8ab257-35d3-4473-b57b-36315200b38b>
+<CyGuid_8b8ab257-35d3-4473-b57b-36315200b38b type_name="CyDesigner.Common.ProjMgmt.Model.CyPrjMgmtFileSerialize" version="3" xml_contents_version="1">
+<CyGuid_31768f72-0253-412b-af77-e7dba74d1330 type_name="CyDesigner.Common.ProjMgmt.Model.CyPrjMgmtItemSerialize" version="2" name="TK43.c" persistent="Generated_Source\PSoC5\TK43.c">
+<Hidden v="False" />
+</CyGuid_31768f72-0253-412b-af77-e7dba74d1330>
+<build_action v="SOURCE_C;CortexM3;;;" />
+<PropertyDeltas />
+</CyGuid_8b8ab257-35d3-4473-b57b-36315200b38b>
+<CyGuid_8b8ab257-35d3-4473-b57b-36315200b38b type_name="CyDesigner.Common.ProjMgmt.Model.CyPrjMgmtFileSerialize" version="3" xml_contents_version="1">
+<CyGuid_31768f72-0253-412b-af77-e7dba74d1330 type_name="CyDesigner.Common.ProjMgmt.Model.CyPrjMgmtItemSerialize" version="2" name="TK43.h" persistent="Generated_Source\PSoC5\TK43.h">
+<Hidden v="False" />
+</CyGuid_31768f72-0253-412b-af77-e7dba74d1330>
+<build_action v="HEADER;;;;" />
+<PropertyDeltas />
+</CyGuid_8b8ab257-35d3-4473-b57b-36315200b38b>
+</dependencies>
+</CyGuid_0820c2e7-528d-4137-9a08-97257b946089>
+</CyGuid_2f73275c-45bf-46ba-b3b1-00a2fe0c8dd8>
+<filters />
+</CyGuid_ebc4f06d-207f-49c2-a540-72acf4adabc0>
 </dependencies>
 </CyGuid_0820c2e7-528d-4137-9a08-97257b946089>
 </CyGuid_2f73275c-45bf-46ba-b3b1-00a2fe0c8dd8>
@@ -3281,6 +3498,6 @@
 </ignored_deps>
 </CyGuid_495451fe-d201-4d01-b22d-5d3f5609ac37>
 <boot_component v="" />
-<current_generation v="84" />
+<current_generation v="150" />
 </CyGuid_fec8f9e8-2365-4bdb-96d3-a4380222e01b>
 </CyXmlSerializer>
--- a/FluxEngine.cydsn/Sampler/Sampler.v
+++ b/FluxEngine.cydsn/Sampler/Sampler.v
@@ -1,7 +1,6 @@

 //`#start header` -- edit after this line, do not edit this line
 `include "cypress.v"
-`include "../SuperCounter/SuperCounter.v"

 //`#end` -- edit above this line, do not edit this line
 // Generated on 12/11/2019 at 21:18
@@ -9,7 +8,7 @@
 module Sampler (
 	output [2:0] debug_state,
 	output reg [7:0] opcode,
-	output  req,
+	output  reg       req,
 	input   clock,
 	input   index,
 	input   rdata,
@@ -19,113 +18,63 @@ module Sampler (

 //`#start body` -- edit after this line, do not edit this line

-localparam STATE_RESET = 0;
-localparam STATE_WAITING = 1;
-localparam STATE_INTERVAL = 2;
-localparam STATE_DISPATCH = 3;
-localparam STATE_OPCODE = 4;
-localparam STATE_COUNTING = 5;
+// NOTE: Reset pulse is used in both clock domains, and must be long enough
+// to be detected in both.

-reg [2:0] state;
-wire [6:0] counter;
+reg [5:0] counter;

-wire countnow;
-assign countnow = (state == STATE_COUNTING);
+reg index_q;
+reg rdata_q;

-wire counterreset;
-assign counterreset = (state == STATE_INTERVAL) || (state == STATE_OPCODE);
+reg index_edge;
+reg rdata_edge;

-SuperCounter #(.Delta(1), .ResetValue(0)) Counter
-(
-    /* input */ .clk(clock),
-    /* input */ .reset(counterreset),
-    /* input */ .count(countnow),
-    /* output */ .d(counter)
-);
+reg req_toggle;

-reg oldsampleclock;
-wire sampleclocked;
-assign sampleclocked = !oldsampleclock && sampleclock;
-
-reg oldindex;
-wire indexed;
-assign indexed = !oldindex && index;
-
-wire rdataed;
-reg oldrdata;
-assign rdataed = !oldrdata && rdata;
-
-assign req = (state == STATE_INTERVAL) || (state == STATE_OPCODE);
-
-always @(posedge clock)
+always @(posedge sampleclock)
 begin
    if (reset)
    begin
-        state <= STATE_RESET;
-        opcode <= 0;
-        oldsampleclock <= 0;
-        oldindex <= 0;
-        oldrdata <= 0;
+        index_edge <= 0;
+        rdata_edge <= 0;
+        index_q <= 0;
+        rdata_q <= 0;
+        counter <= 0;
+        req_toggle <= 0;
    end
    else
-        case (state)
-            STATE_RESET:
-                state <= STATE_WAITING;
-            
-            STATE_WAITING:
-            begin
-                if (rdataed || indexed)
-                begin
-                    opcode <= {0, counter};
-                    state <= STATE_INTERVAL;
-                end
-                else if (sampleclocked)
-                begin
-                    oldsampleclock <= 1;
-                    if (counter == 7'h7f)
-                    begin
-                        opcode <= {0, counter};
-                        state <= STATE_OPCODE;
-                    end
-                    else
-                        state <= STATE_COUNTING;
-                end
-                
-                if (oldrdata && !rdata)
-                    oldrdata <= 0;
-                if (oldindex && !index)
-                    oldindex <= 0;
-                if (oldsampleclock && !sampleclock)
-                    oldsampleclock <= 0;
-            end
-            
-            STATE_INTERVAL: /* interval byte sent here; counter reset */
-                state <= STATE_DISPATCH;
-                
-            STATE_DISPATCH: /* relax after interval byte, dispatch for opcode */
-            begin
-                if (rdataed)
-                begin
-                    oldrdata <= 1;
-                    opcode <= 8'h80;
-                    state <= STATE_OPCODE;
-                end
-                else if (indexed)
-                begin
-                    oldindex <= 1;
-                    opcode <= 8'h81;
-                    state <= STATE_OPCODE;
-                end
-                else
-                    state <= STATE_WAITING;
-            end
-            
-            STATE_OPCODE: /* opcode byte sent here */
-                state <= STATE_WAITING;
-                            
-            STATE_COUNTING:
-                state <= STATE_WAITING;
-        endcase
+    begin
+        /* Both index and rdata are active high -- positive-going edges
+         * indicate the start of an index pulse and read pulse, respectively.
+         */
+         
+        index_edge <= index && !index_q;
+        index_q <= index;
+        
+        rdata_edge <= rdata && !rdata_q;
+        rdata_q <= rdata;
+        
+        if (rdata_edge || index_edge || (counter == 6'h3f)) begin
+            opcode <= { rdata_edge, index_edge, counter };
+            req_toggle <= ~req_toggle;
+            counter <= 1;   /* remember to count this tick */
+        end else begin
+            counter <= counter + 1;
+        end
+    end
+end
+
+reg req_toggle_q;
+
+always @(posedge clock)
+begin
+    if (reset) begin
+        req_toggle_q <= 0;
+        req <= 0;
+    end else begin
+        req_toggle_q <= req_toggle;
+        req <= (req_toggle != req_toggle_q);
+    end
 end

 //`#end` -- edit above this line, do not edit this line
--- a/FluxEngine.cydsn/Sequencer/Sequencer.v
+++ b/FluxEngine.cydsn/Sequencer/Sequencer.v
@@ -18,21 +18,16 @@ module Sequencer (

 //`#start body` -- edit after this line, do not edit this line

-localparam STATE_IDLE = 0;
-localparam STATE_LOAD = 1;
-localparam STATE_WAITING = 2;
-localparam STATE_PULSING = 3;
-localparam STATE_INDEXING = 4;
+localparam STATE_LOAD = 0;
+localparam STATE_WRITING = 1;

-localparam OPCODE_PULSE = 8'h80;
-localparam OPCODE_INDEX = 8'h81;
+reg state;
+reg [5:0] countdown;
+reg pulsepending;

-reg [2:0] state;
-reg [6:0] countdown;
-
-assign req = (state == STATE_LOAD);
-assign wdata = (state == STATE_PULSING);
-assign debug_state = state;
+assign req = (!reset && (state == STATE_LOAD));
+assign wdata = (!reset && (state == STATE_WRITING) && (countdown == 0) && pulsepending);
+assign debug_state = 0;

 reg olddataclock;
 wire dataclocked;
@@ -40,9 +35,7 @@ always @(posedge clock) olddataclock <= dataclock;
 assign dataclocked = !olddataclock && dataclock;

 reg oldsampleclock;
-wire sampleclocked;
-always @(posedge clock) oldsampleclock <= sampleclock;
-assign sampleclocked = !oldsampleclock && sampleclock;
+reg sampleclocked;

 reg oldindex;
 wire indexed;
@@ -53,48 +46,44 @@ always @(posedge clock)
 begin
    if (reset)
    begin
-        state <= STATE_IDLE;
+        state <= STATE_LOAD;
        countdown <= 0;
+        pulsepending <= 0;
+        oldsampleclock <= 0;
    end
    else
+    begin
+        if (!oldsampleclock && sampleclock)
+            sampleclocked <= 1;
+        oldsampleclock <= sampleclock;
+            
        case (state)
-            STATE_IDLE:
-                state <= STATE_LOAD;
-            
            STATE_LOAD:
+            begin
+                /* A posedge on dataclocked indicates that another opcode has
+                 * arrived. */
                if (dataclocked)
-                    case (opcode)
-                        OPCODE_PULSE:
-                            state <= STATE_PULSING;
-                        
-                        OPCODE_INDEX:
-                            state <= STATE_INDEXING;
-                        
-                        default:
-                        begin
-                            countdown <= opcode[6:0];
-                            state <= STATE_WAITING;
-                        end
-                    endcase
+                begin
+                    pulsepending <= opcode[7];
+                    countdown <= opcode[5:0];
+                    
+                    state <= STATE_WRITING;
+                end
+            end
            
-            STATE_WAITING:
+            STATE_WRITING:
+            begin
                if (sampleclocked)
                begin
                    if (countdown == 0)
                        state <= STATE_LOAD;
                    else
                        countdown <= countdown - 1;
+                    sampleclocked <= 0;
                end
-            
-            STATE_PULSING:
-                state <= STATE_LOAD;
-            
-            STATE_INDEXING:
-                if (indexed)
-                    state <= STATE_LOAD;
-                else
-                    state <= STATE_INDEXING;
+            end
        endcase
+    end
 end

 //`#end` -- edit above this line, do not edit this line
--- a/FluxEngine.cydsn/TopDesign/TopDesign.cysch
+++ b/FluxEngine.cydsn/TopDesign/TopDesign.cysch
--- a/FluxEngine.cydsn/main.c
+++ b/FluxEngine.cydsn/main.c
@@ -5,7 +5,6 @@
 #include <setjmp.h>
 #include "project.h"
 #include "../protocol.h"
-#include "../lib/common/crunch.h"

 #define MOTOR_ON_TIME 5000 /* milliseconds */
 #define STEP_INTERVAL_TIME 6 /* ms */
@@ -14,19 +13,26 @@
 #define DISKSTATUS_WPT    1
 #define DISKSTATUS_DSKCHG 2

-#define STEP_TOWARDS0 1
-#define STEP_AWAYFROM0 0
+#define STEP_TOWARDS0 0
+#define STEP_AWAYFROM0 1

-static volatile uint32_t clock = 0;
+static bool drive0_present;
+static bool drive1_present;
+
+static volatile uint32_t clock = 0; /* ms */
 static volatile bool index_irq = false;
+/* Duration in ms. 0 causes every pulse to be an index pulse. Durations since
+ * last pulse greater than this value imply sector pulse. Otherwise is an index
+ * pulse. */
+static volatile uint32_t hardsec_index_threshold = 0;

 static bool motor_on = false;
 static uint32_t motor_on_time = 0;
 static bool homed = false;
 static int current_track = 0;
-static uint8_t current_drive_flags = 0;
+static struct set_drive_frame current_drive_flags;

-#define BUFFER_COUNT 16
+#define BUFFER_COUNT 64 /* the maximum */
 #define BUFFER_SIZE 64
 static uint8_t td[BUFFER_COUNT];
 static uint8_t dma_buffer[BUFFER_COUNT][BUFFER_SIZE] __attribute__((aligned()));
@@ -41,21 +47,60 @@ static volatile bool dma_underrun = false;
 #define DECLARE_REPLY_FRAME(STRUCT, TYPE) \
    STRUCT r = {.f = { .type = TYPE, .size = sizeof(STRUCT) }}

+static void stop_motor(void);
+
 static void system_timer_cb(void)
 {
    CyGlobalIntDisable;
    clock++;
+    
+    static int counter300rpm = 0;
+    counter300rpm++;
+    if (counter300rpm == 200)
+        counter300rpm = 0;
+    
+    static int counter360rpm = 0;
+    counter360rpm++;
+    if (counter360rpm == 167)
+        counter360rpm = 0;
+    
+    FAKE_INDEX_GENERATOR_REG_Write(
+        ((counter300rpm == 0) ? 1 : 0)
+        | ((counter360rpm == 0) ? 2 : 0));
+    
    CyGlobalIntEnable;
 }

 CY_ISR(index_irq_cb)
 {
-    index_irq = true;
+    /* Hard sectored media has sector pulses at the beginning of every sector
+     * and the index pulse is an extra pulse in the middle of the last sector.
+     * When the extra pulse is seen, the next sector pulse is also the start of
+     * the track. */
+    static bool hardsec_index_irq_primed = false;
+    static uint32_t hardsec_last_pulse_time = 0;
+
+    if (!hardsec_index_threshold)
+    {
+        index_irq = true;
+        hardsec_index_irq_primed = false;
+    }
+    else
+    {
+        index_irq = hardsec_index_irq_primed;
+        if (index_irq)
+            hardsec_index_irq_primed = false;
+        else
+            hardsec_index_irq_primed =
+                clock - hardsec_last_pulse_time <= hardsec_index_threshold;
+        hardsec_last_pulse_time = clock;
+    }
    
    /* Stop writing the instant the index pulse comes along; it may take a few
     * moments for the main code to notice the pulse, and we don't want to overwrite
     * the beginning of the track. */
-    ERASE_REG_Write(0);
+    if (index_irq)
+        ERASE_REG_Write(0);
 }

 CY_ISR(capture_dma_finished_irq_cb)
@@ -85,21 +130,25 @@ static void print(const char* msg, ...)
    UART_PutCRLF();
 }

-static void set_drive_flags(uint8_t flags)
+static void set_drive_flags(struct set_drive_frame* flags)
 {
-    if (current_drive_flags != flags)
+    if (current_drive_flags.drive != flags->drive)
+    {
+        stop_motor();
        homed = false;
+    }
    
-    current_drive_flags = flags;
-    DRIVESELECT_REG_Write((flags & 1) ? 2 : 1); /* select drive 1 or 0 */
-    DENSITY_REG_Write(flags >> 1); /* density bit */
+    current_drive_flags = *flags;
+    DRIVESELECT_REG_Write(flags->drive ? 2 : 1); /* select drive 1 or 0 */
+    DENSITY_REG_Write(flags->high_density); /* density bit */
+    INDEX_REG_Write(flags->index_mode);
 }

 static void start_motor(void)
 {
    if (!motor_on)
    {
-        set_drive_flags(current_drive_flags);
+        set_drive_flags(&current_drive_flags);
        MOTOR_REG_Write(1);
        CyDelay(1000);
        homed = false;
@@ -126,6 +175,12 @@ static void wait_until_writeable(int ep)
        ;
 }

+static void wait_until_readable(int ep)
+{
+    while (USBFS_GetEPState(ep) != USBFS_OUT_BUFFER_FULL)
+        ;
+}
+
 static void send_reply(struct any_frame* f)
 {
    print("reply 0x%02x", f->f.type);
@@ -143,9 +198,15 @@ static void send_error(int code)
 /* buffer must be big enough for a frame */
 static int usb_read(int ep, uint8_t buffer[FRAME_SIZE])
 {
+    if (USBFS_GetEPState(ep) != USBFS_OUT_BUFFER_FULL)
+    {
+        USBFS_EnableOutEP(ep);
+        wait_until_readable(ep);
+    }
+
    int length = USBFS_GetEPCount(ep);
    USBFS_ReadOutEP(ep, buffer, length);
-    while (USBFS_GetEPState(ep) == USBFS_OUT_BUFFER_FULL)
+    while (USBFS_GetEPState(ep) != USBFS_OUT_BUFFER_EMPTY)
        ;
    return length;
 }
@@ -167,19 +228,19 @@ static void step(int dir)
    CyDelay(STEP_INTERVAL_TIME);
 }

-static void home(void)
+/* returns true if it looks like a drive is attached */
+static bool home(void)
 {
    for (int i=0; i<100; i++)
    {
        /* Don't keep stepping forever, because if a drive's
         * not connected bad things happen. */
        if (TRACK0_REG_Read())
-            break;
+            return true;
        step(STEP_TOWARDS0);
    }
    
-    /* Step to -1, which should be a nop, to reset the disk on disk change. */
-    step(STEP_TOWARDS0);
+    return false;
 }

 static void seek_to(int track)
@@ -214,6 +275,8 @@ static void seek_to(int track)
        CyWdtClear();
    }
    CyDelay(STEP_SETTLING_TIME);
+    
+    TK43_REG_Write(track < 43); /* high if 0..42, low if 43 or up */
    print("finished seek");
 }

@@ -232,30 +295,48 @@ static void cmd_recalibrate(void)
    send_reply(&r);    
 }
    
-static void cmd_measure_speed(struct any_frame* f)
+static void cmd_measure_speed(struct measurespeed_frame* f)
 {
    start_motor();
    
-    index_irq = false;
-    while (!index_irq)
-        ;
    index_irq = false;
    int start_clock = clock;
+    int elapsed = 0;
    while (!index_irq)
-        ;
-    int end_clock = clock;
+    {
+        elapsed = clock - start_clock;
+        if (elapsed > 1000)
+        {
+            elapsed = 0;
+            break;
+        }
+    }
+
+    if (elapsed != 0)
+    {
+        int target_pulse_count = f->hard_sector_count + 1;
+        start_clock = clock;
+        for (int x=0; x<target_pulse_count; x++)
+        {
+            index_irq = false;
+            while (!index_irq)
+                elapsed = clock - start_clock;
+        }
+    }
    
    DECLARE_REPLY_FRAME(struct speed_frame, F_FRAME_MEASURE_SPEED_REPLY);
-    r.period_ms = end_clock - start_clock;
+    r.period_ms = elapsed;
    send_reply((struct any_frame*) &r);    
 }

-static void cmd_bulk_test(struct any_frame* f)
+static void cmd_bulk_write_test(struct any_frame* f)
 {
    uint8_t buffer[64];
    
    wait_until_writeable(FLUXENGINE_DATA_IN_EP_NUM);
    for (int x=0; x<64; x++)
+    {
+        CyWdtClear();
        for (int y=0; y<256; y++)
        {
            for (unsigned z=0; z<sizeof(buffer); z++)
@@ -264,11 +345,44 @@ static void cmd_bulk_test(struct any_frame* f)
            wait_until_writeable(FLUXENGINE_DATA_IN_EP_NUM);
            USBFS_LoadInEP(FLUXENGINE_DATA_IN_EP_NUM, buffer, sizeof(buffer));
        }
+    }
    
-    DECLARE_REPLY_FRAME(struct any_frame, F_FRAME_BULK_TEST_REPLY);
+    DECLARE_REPLY_FRAME(struct any_frame, F_FRAME_BULK_WRITE_TEST_REPLY);
    send_reply(&r);
 }

+static void cmd_bulk_read_test(struct any_frame* f)
+{
+    uint8_t buffer[64];
+    
+    bool passed = true;
+    for (int x=0; x<64; x++)
+    {
+        CyWdtClear();
+        for (int y=0; y<256; y++)
+        {
+            usb_read(FLUXENGINE_DATA_OUT_EP_NUM, buffer);
+            for (unsigned z=0; z<sizeof(buffer); z++)
+            {
+                if (buffer[z] != (uint8)(x+y+z))
+                {
+                    print("fail %d+%d+%d == %d, not %d", x, y, z, buffer[z], (uint8)(x+y+z));
+                    passed = false;
+                }
+            }
+        }
+    }
+
+    print("passed=%d", passed);
+    if (passed)
+    {
+        DECLARE_REPLY_FRAME(struct any_frame, F_FRAME_BULK_READ_TEST_REPLY);
+        send_reply(&r);
+    }
+    else
+        send_error(F_ERROR_INVALID_VALUE);
+}
+
 static void deinit_dma(void)
 {
    for (int i=0; i<BUFFER_COUNT; i++)
@@ -278,7 +392,7 @@ static void deinit_dma(void)
 static void init_capture_dma(void)
 {
    dma_channel = SAMPLER_DMA_DmaInitialize(
-        2 /* bytes */,
+        1 /* bytes */,
        true /* request per burst */, 
        HI16(CYDEV_PERIPH_BASE),
        HI16(CYDEV_SRAM_BASE));
@@ -299,14 +413,15 @@ static void init_capture_dma(void)

 static void cmd_read(struct read_frame* f)
 {
-    SIDE_REG_Write(f->side);
    seek_to(current_track);
+    SIDE_REG_Write(f->side);
+    STEP_REG_Write(f->side); /* for drives which multiplex SIDE and DIR */
    
    /* Do slow setup *before* we go into the real-time bit. */
    
    {
        uint8_t i = CyEnterCriticalSection();
-        SAMPLER_FIFO_SET_LEVEL_MID;
+        SAMPLER_FIFO_SET_LEVEL_NORMAL;
        SAMPLER_FIFO_CLEAR;
        SAMPLER_FIFO_SINGLE_BUFFER_UNSET;
        CyExitCriticalSection(i);
@@ -315,16 +430,17 @@ static void cmd_read(struct read_frame* f)
    wait_until_writeable(FLUXENGINE_DATA_IN_EP_NUM);
    init_capture_dma();

-    /* Wait for the beginning of a rotation. */
+    /* Wait for the beginning of a rotation, if requested. */
        
-    index_irq = false;
-    while (!index_irq)
-        ;
-    index_irq = false;
-    
-    crunch_state_t cs = {};
-    cs.outputptr = usb_buffer;
-    cs.outputlen = BUFFER_SIZE;
+    if (f->synced)
+    {
+        hardsec_index_threshold = f->hardsec_threshold_ms;
+        index_irq = false;
+        while (!index_irq)
+            ;
+        index_irq = false;
+        hardsec_index_threshold = 0;
+    }
    
    dma_writing_to_td = 0;
    dma_reading_from_td = -1;
@@ -337,75 +453,68 @@ static void cmd_read(struct read_frame* f)
    /* Wait for the first DMA transfer to complete, after which we can start the
     * USB transfer. */

-    while ((dma_writing_to_td == 0) && !index_irq)
+    while (dma_writing_to_td == 0)
        ;
    dma_reading_from_td = 0;
+    bool dma_running = true;
    
    /* Start transferring. */

-    int revolutions = f->revolutions;
-    while (!dma_underrun)
+    uint32_t start_time = clock;
+    for (;;)
    {
        CyWdtClear();

-        /* Have we reached the index pulse? */
-        if (index_irq)
-        {
-            index_irq = false;
-            revolutions--;
-            if (revolutions == 0)
-                break;
-        }
+        /* If the sample session is over, stop reading but continue processing until
+         * the DMA chain is empty. */
        
-        /* Wait for the next block to be read. */
-        while (dma_reading_from_td == dma_writing_to_td)
+        if ((clock - start_time) >= f->milliseconds)
        {
-            /* On an underrun, give up immediately. */
-            if (dma_underrun)
-                goto abort;
-        }
-
-        uint8_t dma_buffer_usage = 0;
-        while (dma_buffer_usage < BUFFER_SIZE)
-        {
-            cs.inputptr = dma_buffer[dma_reading_from_td] + dma_buffer_usage;
-            cs.inputlen = BUFFER_SIZE - dma_buffer_usage;
-            crunch(&cs);
-            dma_buffer_usage += BUFFER_SIZE - cs.inputlen;
-            count++;
-            if (cs.outputlen == 0)
+            if (dma_running)
            {
-                while (USBFS_GetEPState(FLUXENGINE_DATA_IN_EP_NUM) != USBFS_IN_BUFFER_EMPTY)
-                {
-                    if (index_irq || dma_underrun)
-                        goto abort;
-                }
-
-                USBFS_LoadInEP(FLUXENGINE_DATA_IN_EP_NUM, usb_buffer, BUFFER_SIZE);
-                cs.outputptr = usb_buffer;
-                cs.outputlen = BUFFER_SIZE;
+                CyDmaChSetRequest(dma_channel, CY_DMA_CPU_TERM_CHAIN);
+                while (CyDmaChGetRequest(dma_channel))
+                    ;
+                dma_running = false;
+                dma_underrun = false;
            }
        }
-        dma_reading_from_td = NEXT_BUFFER(dma_reading_from_td);
+        
+        /* If there's an underrun event, stop immediately. */
+        
+        if (dma_underrun)
+            goto abort;
+        
+        /* If there are no more blocks to be read, check to see if we've finished. */
+        
+        if (dma_reading_from_td == dma_writing_to_td)
+        {
+            /* Also if we've run out of blocks to send. */
+            
+            if (!dma_running)
+                goto abort;
+        }
+        else
+        {
+            /* Otherwise, there's a block waiting, so attempt to send it. */
+            
+            wait_until_writeable(FLUXENGINE_DATA_IN_EP_NUM);
+            USBFS_LoadInEP(FLUXENGINE_DATA_IN_EP_NUM, dma_buffer[dma_reading_from_td], BUFFER_SIZE);
+            count++;
+            dma_reading_from_td = NEXT_BUFFER(dma_reading_from_td);
+        }
    }
 abort:;
-    CyDmaChSetRequest(dma_channel, CY_DMA_CPU_TERM_CHAIN);
-    while (CyDmaChGetRequest(dma_channel))
-        ;
+    bool saved_dma_underrun = dma_underrun;

-    donecrunch(&cs);
+    /* Terminate the transfer (all transfers are an exact number of fragments). */
+    wait_until_writeable(FLUXENGINE_DATA_IN_EP_NUM);
+    USBFS_LoadInEP(FLUXENGINE_DATA_IN_EP_NUM, NULL, 0);
    wait_until_writeable(FLUXENGINE_DATA_IN_EP_NUM);
-    if (!dma_underrun)
-    {
-        if (cs.outputlen != BUFFER_SIZE)
-            USBFS_LoadInEP(FLUXENGINE_DATA_IN_EP_NUM, usb_buffer, BUFFER_SIZE-cs.outputlen);
-        wait_until_writeable(FLUXENGINE_DATA_IN_EP_NUM);
-    }
-    if ((cs.outputlen == BUFFER_SIZE) || (cs.outputlen == 0))
-        USBFS_LoadInEP(FLUXENGINE_DATA_IN_EP_NUM, NULL, 0);
    deinit_dma();

-    if (dma_underrun)
+    STEP_REG_Write(0);
+    if (saved_dma_underrun)
    {
        print("underrun after %d packets");
        send_error(F_ERROR_UNDERRUN);
@@ -450,35 +559,34 @@ static void cmd_write(struct write_frame* f)
        return;
    }
    
-    SEQUENCER_CONTROL_Write(1); /* put the sequencer into reset */
-
+    seek_to(current_track);    
    SIDE_REG_Write(f->side);
+    STEP_REG_Write(f->side); /* for drives which multiplex SIDE and DIR */
+    
+    SEQUENCER_CONTROL_Write(1); /* put the sequencer into reset */
    {
        uint8_t i = CyEnterCriticalSection();        
-        REPLAY_FIFO_SET_LEVEL_NORMAL;
+        REPLAY_FIFO_SET_LEVEL_MID;
        REPLAY_FIFO_CLEAR;
        REPLAY_FIFO_SINGLE_BUFFER_UNSET;
        CyExitCriticalSection(i);
    }
-    seek_to(current_track);    

    init_replay_dma();
    bool writing = false; /* to the disk */
-    bool finished = false;
    int packets = f->bytes_to_write / FRAME_SIZE;
+    bool finished = (packets == 0);
    int count_written = 0;
    int count_read = 0;
    dma_writing_to_td = 0;
    dma_reading_from_td = -1;
    dma_underrun = false;
-
-    crunch_state_t cs = {};
-    cs.outputlen = BUFFER_SIZE;
-    USBFS_EnableOutEP(FLUXENGINE_DATA_OUT_EP_NUM);
    
    int old_reading_from_td = -1;
    for (;;)
    {
+        //CyWdtClear();
+
        /* Read data from USB into the buffers. */
        
        if (NEXT_BUFFER(dma_writing_to_td) != dma_reading_from_td)
@@ -486,54 +594,25 @@ static void cmd_write(struct write_frame* f)
            if (writing && (dma_underrun || index_irq))
                goto abort;
            
-            /* Read crunched data, if necessary. */
-            
-            if (cs.inputlen == 0)
+            uint8_t* buffer = dma_buffer[dma_writing_to_td];
+            if (finished)
            {
-                if (finished)
-                {
-                    /* There's no more data to read, so fake some. */
-                    
-                    for (int i=0; i<BUFFER_SIZE; i++)
-                        usb_buffer[i+0] = 0x7f;
-                    cs.inputptr = usb_buffer;
-                    cs.inputlen = BUFFER_SIZE;
-                }
-                else
-                {
-                    while (USBFS_GetEPState(FLUXENGINE_DATA_OUT_EP_NUM) != USBFS_OUT_BUFFER_FULL)
-                    {
-                        if (writing && (dma_underrun || index_irq))
-                            goto abort;
-                    }
-
-                    int length = usb_read(FLUXENGINE_DATA_OUT_EP_NUM, usb_buffer);
-                    cs.inputptr = usb_buffer;
-                    cs.inputlen = length;
-                    USBFS_EnableOutEP(FLUXENGINE_DATA_OUT_EP_NUM);
-
-                    count_read++;
-                    if ((length < FRAME_SIZE) || (count_read == packets))
-                        finished = true;
-                }
+                /* There's no more data to read, so fake some. */
+                
+                memset(buffer, 0x3f, BUFFER_SIZE);
            }
-            
-            /* If there *is* data waiting in the buffer, uncrunch it. */
-            
-            if (cs.inputlen != 0)
+            else
            {
-                cs.outputptr = dma_buffer[dma_writing_to_td] + BUFFER_SIZE - cs.outputlen;
-                uncrunch(&cs);
-                if (cs.outputlen == 0)
-                {
-                    /* Completed a DMA buffer; queue it for writing. */
-                    
-                    dma_writing_to_td = NEXT_BUFFER(dma_writing_to_td);
-                    cs.outputlen = BUFFER_SIZE;
-                }
+                (void) usb_read(FLUXENGINE_DATA_OUT_EP_NUM, buffer);
+                count_read++;
+                
+                if (count_read == packets)
+                    finished = true;
            }
+            dma_writing_to_td = NEXT_BUFFER(dma_writing_to_td);
+            
+            /* Once all the buffers are full, start writing. */
            
-            /* If we have a full buffer, start writing. */
            if ((dma_reading_from_td == -1) && (dma_writing_to_td == BUFFER_COUNT-1))
            {
                dma_reading_from_td = old_reading_from_td = 0;
@@ -548,7 +627,8 @@ static void cmd_write(struct write_frame* f)

                /* Wait for the index marker. While this happens, the DMA engine
                 * will prime the FIFO. */
-                
+
+                hardsec_index_threshold = f->hardsec_threshold_ms;
                index_irq = false;
                while (!index_irq)
                    ;
@@ -559,7 +639,7 @@ static void cmd_write(struct write_frame* f)
                SEQUENCER_CONTROL_Write(0); /* start writing! */
            }
        }
-        
+
        if (writing && (dma_underrun || index_irq))
            goto abort;

@@ -583,31 +663,29 @@ abort:
    }
    
    print("p=%d cr=%d cw=%d f=%d w=%d index=%d underrun=%d", packets, count_read, count_written, finished, writing, index_irq, dma_underrun);
+    hardsec_index_threshold = 0;
    if (!finished)
    {
-        while (count_read < packets)
+        /* There's still some data to read, so just read and blackhole it ---
+         * easier than trying to terminate the connection. */
+        while (count_read != packets)
        {
-            if (USBFS_GetEPState(FLUXENGINE_DATA_OUT_EP_NUM) == USBFS_OUT_BUFFER_FULL)
-            {
-                int length = usb_read(FLUXENGINE_DATA_OUT_EP_NUM, usb_buffer);
-                if (length < FRAME_SIZE)
-                    break;
-                USBFS_EnableOutEP(FLUXENGINE_DATA_OUT_EP_NUM);
-                count_read++;
-            }
+            (void) usb_read(FLUXENGINE_DATA_OUT_EP_NUM, usb_buffer);
+            count_read++;
        }
-        USBFS_DisableOutEP(FLUXENGINE_DATA_OUT_EP_NUM);
    }
    
    deinit_dma();
-    print("write finished");
    
+    STEP_REG_Write(0);
    if (dma_underrun)
    {
+        print("underrun!");
        send_error(F_ERROR_UNDERRUN);
        return;
    }

+    print("success");
    DECLARE_REPLY_FRAME(struct any_frame, F_FRAME_WRITE_REPLY);
    send_reply((struct any_frame*) &r);
 }
@@ -619,6 +697,7 @@ static void cmd_erase(struct erase_frame* f)
    /* Disk is now spinning. */
    
    print("start erasing");
+    hardsec_index_threshold = f->hardsec_threshold_ms;
    index_irq = false;
    while (!index_irq)
        ;
@@ -627,6 +706,7 @@ static void cmd_erase(struct erase_frame* f)
    while (!index_irq)
        ;
    ERASE_REG_Write(0);
+    hardsec_index_threshold = 0;
    print("stop erasing");

    DECLARE_REPLY_FRAME(struct any_frame, F_FRAME_ERASE_REPLY);
@@ -635,7 +715,11 @@ static void cmd_erase(struct erase_frame* f)

 static void cmd_set_drive(struct set_drive_frame* f)
 {
-    set_drive_flags(f->drive_flags);
+    if (drive0_present && !drive1_present)
+        f->drive = 0;
+    if (drive1_present && !drive0_present)
+        f->drive = 1;
+    set_drive_flags(f);
    
    DECLARE_REPLY_FRAME(struct any_frame, F_FRAME_SET_DRIVE_REPLY);
    send_reply((struct any_frame*) &r);
@@ -748,11 +832,15 @@ static void handle_command(void)
            break;
        
        case F_FRAME_MEASURE_SPEED_CMD:
-            cmd_measure_speed(f);
+            cmd_measure_speed((struct measurespeed_frame*) f);
            break;
            
-        case F_FRAME_BULK_TEST_CMD:
-            cmd_bulk_test(f);
+        case F_FRAME_BULK_WRITE_TEST_CMD:
+            cmd_bulk_write_test(f);
+            break;
+            
+        case F_FRAME_BULK_READ_TEST_CMD:
+            cmd_bulk_read_test(f);
            break;
            
        case F_FRAME_READ_CMD:
@@ -784,6 +872,21 @@ static void handle_command(void)
    }
 }

+static void detect_drives(void)
+{
+    current_drive_flags.drive = 0;
+    start_motor();
+    drive0_present = home();
+    stop_motor();
+    
+    current_drive_flags.drive = 1;
+    start_motor();
+    drive1_present = home();
+    stop_motor();
+    
+    print("drive 0: %s drive 1: %s", drive0_present ? "yes" : "no", drive1_present ? "yes" : "no");
+}
+
 int main(void)
 {
    CyGlobalIntEnable;
@@ -797,11 +900,11 @@ int main(void)
    DRIVESELECT_REG_Write(0);
    UART_Start();
    USBFS_Start(0, USBFS_DWR_VDDD_OPERATION);
+    USBFS_DisableOutEP(FLUXENGINE_DATA_OUT_EP_NUM);
    
+    detect_drives();
    CyWdtStart(CYWDT_1024_TICKS, CYWDT_LPMODE_DISABLED);
    
-    /* UART_PutString("GO\r"); */
-
    for (;;)
    {
        CyWdtClear();
@@ -817,14 +920,14 @@ int main(void)
        {
            print("Waiting for USB...");
            while (!USBFS_GetConfiguration())
-                ;
+                CyWdtClear();
            print("USB ready");
            USBFS_EnableOutEP(FLUXENGINE_CMD_OUT_EP_NUM);
        }
        
        if (USBFS_GetEPState(FLUXENGINE_CMD_OUT_EP_NUM) == USBFS_OUT_BUFFER_FULL)
        {
-            set_drive_flags(current_drive_flags);
+            set_drive_flags(&current_drive_flags);
            handle_command();
            USBFS_EnableOutEP(FLUXENGINE_CMD_OUT_EP_NUM);
            print("idle");
--- a/20
+++ b/20
@@ -1,8 +1,13 @@
 PACKAGES = zlib sqlite3 libusb-1.0

-export CFLAGS = -Os -g --std=c++14 \
-	-ffunction-sections -fdata-sections
-export LDFLAGS = -Os
+export CFLAGS = --std=c++14 -ffunction-sections -fdata-sections
+export LDFLAGS =
+
+export COPTFLAGS = -Os
+export LDOPTFLAGS = -Os -s
+
+export CDBGFLAGS = -O0 -g
+export LDDBGFLAGS = -O0 -g

 ifeq ($(OS), Windows_NT)
 export CXX = /mingw32/bin/g++
@@ -13,6 +18,13 @@ export LDFLAGS +=
 export LIBS = -static -lz -lsqlite3 -lusb-1.0
 export EXTENSION = .exe
 else
+
+packages-exist = $(shell pkg-config --exists $(PACKAGES) && echo yes)
+ifneq ($(packages-exist),yes)
+$(warning These pkg-config packages are installed: $(shell pkg-config --list-all | sort | awk '{print $$1}'))
+$(error You must have these pkg-config packages installed: $(PACKAGES))
+endif
+
 export CXX = g++
 export AR = ar rcs
 export STRIP = strip
@@ -27,7 +39,7 @@ CFLAGS += -Ilib -Idep/fmt -Iarch
 export OBJDIR = .obj

 all: .obj/build.ninja
-	@ninja -f .obj/build.ninja -v
+	@ninja -f .obj/build.ninja

 clean:
 	@echo CLEAN
--- a/README.md
+++ b/README.md
@@ -24,17 +24,18 @@ Don't believe me? Watch the demo reel!
 <iframe width="373" height="210" src="https://www.youtube.com/embed/m_s1iw8eW7o" frameborder="0" allow="accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>
 </div>

-**Important note.** On 2019-02-09 I did a hardware redesign and moved the pins on
-the board. Sorry for the inconvenience, but it means you don't have to modify
-the board any more to make it work. If you built the hardware prior to then,
-you'll need to adjust it.
+**New!** The FluxEngine client software now works with
+[GreaseWeazle](https://github.com/keirf/Greaseweazle/wiki) hardware. So, if you
+can't find a PSoC5 development kit, or don't want to use the Cypress Windows
+tools for programming it, you can use one of these instead. Very nearly all
+FluxEngine features are available with the GreaseWeazle and it works out-of-the
+box. See the [dedicated GreaseWeazle documentation page](doc/greaseweazle.md)
+for more information.

-**Another important note.** On 2019-07-03 I've revamped the build process and
-the (command line) user interface. It should be much nicer now, not least in
-that there's a single client binary with all the functionality in it. The
-interface is a little different, but not much. The build process is now
-better (simpler). See [the building](doc/building.md) and
-[using](doc/using.md) pages for more details.
+**Important note.** On 2020-04-02 I changed the bytecode format (and firmware).
+Flux files will need to be upgraded with `fluxengine upgradefluxfile`. The new
+format should be more reliable and use way, way less bandwidth. Sorry for the
+inconvenience.

 Where?
 ------
@@ -59,8 +60,15 @@ following friendly articles:
  - [Using a FluxEngine](doc/using.md) ∾ what to do with your new hardware ∾
    flux files and image files ∾ knowing what you're doing

-  - [Troubleshooting dubious disks](doc/problems.md) ∾ it's not an exact science ∾
-    the sector map ∾ clock detection and the histogram
+  - [Using GreaseWeazle hardware with the FluxEngine client
+	software](doc/greaseweazle.md) ∾ what works ∾ what doesn't work ∾ where to
+	go for help
+
+  - [Troubleshooting dubious disks](doc/problems.md) ∾ it's not an exact
+	science ∾ the sector map ∾ clock detection and the histogram
+
+  - [Checking your drive](doc/driveresponse.md) ∾ you can't do that with that ∾
+	measuring your drive's ability to work with exotic formats

 Which?
 ------
@@ -79,20 +87,24 @@ people who've had it work).

 | Format                                   | Read? | Write? | Notes |
 |:-----------------------------------------|:-----:|:------:|-------|
-| IBM PC compatible                        |  🦄   |        | and compatibles (like the Atari ST) |
-| [Acorn ADFS](doc/disk-acornadfs.md)      |  🦄   |        | single- and double- sided           |
-| [Acorn DFS](doc/disk-acorndfs.md)        |  🦄   |        |                                     |
-| [Ampro Little Board](doc/disk-ampro.md)  |  🦖   |        |                                     |
+| [IBM PC compatible](doc/disk-ibm.md)     |  🦄   |   🦄   | and compatibles (like the Atari ST) |
+| [Acorn ADFS](doc/disk-acornadfs.md)      |  🦄   |   🦖*  | single- and double- sided           |
+| [Acorn DFS](doc/disk-acorndfs.md)        |  🦄   |   🦖*  |                                     |
+| [Ampro Little Board](doc/disk-ampro.md)  |  🦖   |   🦖*   |                                     |
 | [Apple II DOS 3.3](doc/disk-apple2.md)   |  🦄   |        | doesn't do logical sector remapping |
 | [Amiga](doc/disk-amiga.md)               |  🦄   |        |                                     |
 | [Commodore 64 1541](doc/disk-c64.md)     |  🦖   |        | and probably the other GCR formats  |
 | [Brother 120kB](doc/disk-brother.md)     |  🦄   |        |                                     |
 | [Brother 240kB](doc/disk-brother.md)     |  🦄   |   🦄   |                                     |
 | [Brother FB-100](doc/disk-fb100.md)      |  🦖   |        | Tandy Model 100, Husky Hunter, knitting machines |
-| [Macintosh 800kB](doc/disk-macintosh.md) |  🦄   |        | and probably the 400kB too          |
-| [TRS-80](doc/disk-trs80.md)              |  🦖   |        | a minor variation of the IBM scheme |
+| [Macintosh 800kB](doc/disk-macintosh.md) |  🦄   |   🦄   | and probably the 400kB too          |
+| [TRS-80](doc/disk-trs80.md)              |  🦖   |   🦖*  | a minor variation of the IBM scheme |
 {: .datatable }

+`*`: these formats are variations of the generic IBM format, and since the
+IBM writer is completely generic, it should be configurable for these
+formats... theoretically. I don't have the hardware to try it.
+
 ### Even older disk formats

 These formats are for particularly old, weird architectures, even by the
@@ -106,8 +118,10 @@ at least, check the CRC so what data's there is probably good.
 | [AES Superplus / No Problem](doc/disk-aeslanier.md) |  🦖   | | hard sectors! |
 | [Durango F85](doc/disk-durangof85.md)    |  🦖   |        | 5.25" |
 | [DVK MX](doc/disk-mx.md)                 |  🦖   |        | Soviet PDP-11 clone |
-| [Victor 9000](doc/disk-victor9k.md)      |  🦖   |        | 8-inch        |
-| [Zilog MCZ](doc/disk-zilogmcz.md)        |  🦖   |        | 8-inch _and_ hard sectors |
+| [Micropolis](doc/disk-micropolis.md)     |  🦄   |        | Micropolis 100tpi drives |
+| [TI DS990 FD1000](doc/disk-tids990.md)   |  🦄   |  🦄    | 8" |
+| [Victor 9000](doc/disk-victor9k.md)      |  🦖   |        | 8" |
+| [Zilog MCZ](doc/disk-zilogmcz.md)        |  🦖   |        | 8" _and_ hard sectors |
 {: .datatable }

 ### Notes
@@ -191,6 +205,17 @@ contributions from many other people. It is licensed under the terms of the
 BSD license. Please see the contents of the directory for the full text.

 As an exception, `dep/emu` contains parts of the OpenBSD C library
-code, Todd Miller and William A. Rowe (and probably others). It is licensed
+code, maintained by Todd Miller and William A. Rowe (and probably others). It is licensed
 under the terms of the 3-clause BSD license. Please see the contents of the
 directory for the full text. It's been lightly modified by me.
+
+As an exception, `dep/agg` contains parts of the Anti-Grain Antialiasing
+library, written by Maxim Semanarev (and others). It is licensed under the
+terms of the 3-clause BSD license. Please see the contents of the directory for
+the full text. It's been lightly modified by me.
+
+As an exception, `dep/stb` contains parts of the libstb utility library,
+written by Sean T Barett (and others). It is public domain/Unlicense/MIT
+licensed, at your choice. Please see the contents of the directory for the full
+text.
+
--- a/arch/amiga/amiga.cc
+++ b/arch/amiga/amiga.cc
@@ -0,0 +1,101 @@
+#include "globals.h"
+#include "record.h"
+#include "decoders/decoders.h"
+#include "amiga.h"
+#include "bytes.h"
+#include "fmt/format.h"
+
+uint32_t amigaChecksum(const Bytes& bytes)
+{
+    ByteReader br(bytes);
+    uint32_t checksum = 0;
+
+    assert((bytes.size() & 3) == 0);
+    while (!br.eof())
+        checksum ^= br.read_be32();
+
+    return checksum & 0x55555555;
+}
+
+static uint8_t everyother(uint16_t x)
+{
+	                  /* aabb ccdd eeff gghh */
+	x &= 0x6666;      /* 0ab0 0cd0 0ef0 0gh0 */
+	x >>= 1;          /* 00ab 00cd 00ef 00gh */
+	x |= x << 2;      /* abab cdcd efef ghgh */
+	x &= 0x3c3c;      /* 00ab cd00 00ef gh00 */
+	x >>= 2;          /* 0000 abcd 0000 efgh */
+	x |= x >> 4;      /* 0000 abcd abcd efgh */
+	return x;
+}
+
+Bytes amigaInterleave(const Bytes& input)
+{
+	Bytes output;
+	ByteWriter bw(output);
+
+	/* Write all odd bits. (Numbering starts at 0...) */
+
+	{
+		ByteReader br(input);
+		while (!br.eof())
+		{
+			uint16_t x = br.read_be16();
+			x &= 0xaaaa;       /* a0b0 c0d0 e0f0 g0h0 */
+			x |= x >> 1;       /* aabb ccdd eeff gghh */
+			x = everyother(x); /* 0000 0000 abcd efgh */
+			bw.write_8(x);
+		}
+	}
+
+	/* Write all even bits. */
+
+	{
+		ByteReader br(input);
+		while (!br.eof())
+		{
+			uint16_t x = br.read_be16();
+			x &= 0x5555;       /* 0a0b 0c0d 0e0f 0g0h */
+			x |= x << 1;       /* aabb ccdd eeff gghh */
+			x = everyother(x); /* 0000 0000 abcd efgh */
+			bw.write_8(x);
+		}
+	}
+
+	return output;
+}
+
+Bytes amigaDeinterleave(const uint8_t*& input, size_t len)
+{
+    assert(!(len & 1));
+    const uint8_t* odds = &input[0];
+    const uint8_t* evens = &input[len/2];
+    Bytes output;
+    ByteWriter bw(output);
+
+    for (size_t i=0; i<len/2; i++)
+    {
+        uint8_t o = *odds++;
+        uint8_t e = *evens++;
+
+        /* This is the 'Interleave bits with 64-bit multiply' technique from
+         * http://graphics.stanford.edu/~seander/bithacks.html#InterleaveBMN
+         */
+        uint16_t result =
+            (((e * 0x0101010101010101ULL & 0x8040201008040201ULL)
+                * 0x0102040810204081ULL >> 49) & 0x5555) |
+            (((o * 0x0101010101010101ULL & 0x8040201008040201ULL)
+                * 0x0102040810204081ULL >> 48) & 0xAAAA);
+        
+        bw.write_be16(result);
+    }
+
+    input += len;
+    return output;
+}
+
+Bytes amigaDeinterleave(const Bytes& input)
+{
+	const uint8_t* ptr = input.cbegin();
+	return amigaDeinterleave(ptr, input.size());
+}
--- a/arch/amiga/amiga.h
+++ b/arch/amiga/amiga.h
@@ -1,12 +1,17 @@
 #ifndef AMIGA_H
 #define AMIGA_H

+#include "encoders/encoders.h"
+
 #define AMIGA_SECTOR_RECORD 0xaaaa44894489LL

+#define AMIGA_TRACKS_PER_DISK 80
+#define AMIGA_SECTORS_PER_TRACK 11
 #define AMIGA_RECORD_SIZE 0x21f

 class Sector;
 class Fluxmap;
+class SectorSet;

 class AmigaDecoder : public AbstractDecoder
 {
@@ -15,6 +20,24 @@ public:

    RecordType advanceToNextRecord();
    void decodeSectorRecord();
+
+	std::set<unsigned> requiredSectors(Track& track) const;
 };

+class AmigaEncoder : public AbstractEncoder
+{
+public:
+	virtual ~AmigaEncoder() {}
+
+public:
+    std::unique_ptr<Fluxmap> encode(int physicalTrack, int physicalSide, const SectorSet& allSectors);
+};
+
+extern FlagGroup amigaEncoderFlags;
+
+extern uint32_t amigaChecksum(const Bytes& bytes);
+extern Bytes amigaInterleave(const Bytes& input);
+extern Bytes amigaDeinterleave(const uint8_t*& input, size_t len);
+extern Bytes amigaDeinterleave(const Bytes& input);
+
 #endif
--- a/arch/amiga/decoder.cc
+++ b/arch/amiga/decoder.cc
@@ -21,47 +21,6 @@
         
 static const FluxPattern SECTOR_PATTERN(48, AMIGA_SECTOR_RECORD);

-static Bytes deinterleave(const uint8_t*& input, size_t len)
-{
-    assert(!(len & 1));
-    const uint8_t* odds = &input[0];
-    const uint8_t* evens = &input[len/2];
-    Bytes output;
-    ByteWriter bw(output);
-
-    for (size_t i=0; i<len/2; i++)
-    {
-        uint8_t o = *odds++;
-        uint8_t e = *evens++;
-
-        /* This is the 'Interleave bits with 64-bit multiply' technique from
-         * http://graphics.stanford.edu/~seander/bithacks.html#InterleaveBMN
-         */
-        uint16_t result =
-            (((e * 0x0101010101010101ULL & 0x8040201008040201ULL)
-                * 0x0102040810204081ULL >> 49) & 0x5555) |
-            (((o * 0x0101010101010101ULL & 0x8040201008040201ULL)
-                * 0x0102040810204081ULL >> 48) & 0xAAAA);
-        
-        bw.write_be16(result);
-    }
-
-    input += len;
-    return output;
-}
-
-static uint32_t checksum(const Bytes& bytes)
-{
-    ByteReader br(bytes);
-    uint32_t checksum = 0;
-
-    assert((bytes.size() & 3) == 0);
-    while (!br.eof())
-        checksum ^= br.read_be32();
-
-    return checksum & 0x55555555;
-}
-
 AbstractDecoder::RecordType AmigaDecoder::advanceToNextRecord()
 {
    _sector->clock = _fmr->seekToPattern(SECTOR_PATTERN);
@@ -73,27 +32,36 @@ AbstractDecoder::RecordType AmigaDecoder::advanceToNextRecord()
 void AmigaDecoder::decodeSectorRecord()
 {
    const auto& rawbits = readRawBits(AMIGA_RECORD_SIZE*16);
+	if (rawbits.size() < (AMIGA_RECORD_SIZE*16))
+		return;
    const auto& rawbytes = toBytes(rawbits).slice(0, AMIGA_RECORD_SIZE*2);
    const auto& bytes = decodeFmMfm(rawbits).slice(0, AMIGA_RECORD_SIZE);

    const uint8_t* ptr = bytes.begin() + 3;

-    Bytes header = deinterleave(ptr, 4);
-    Bytes recoveryinfo = deinterleave(ptr, 16);
+    Bytes header = amigaDeinterleave(ptr, 4);
+    Bytes recoveryinfo = amigaDeinterleave(ptr, 16);

    _sector->logicalTrack = header[1] >> 1;
    _sector->logicalSide = header[1] & 1;
    _sector->logicalSector = header[2];

-    uint32_t wantedheaderchecksum = deinterleave(ptr, 4).reader().read_be32();
-    uint32_t gotheaderchecksum = checksum(rawbytes.slice(6, 40));
+    uint32_t wantedheaderchecksum = amigaDeinterleave(ptr, 4).reader().read_be32();
+    uint32_t gotheaderchecksum = amigaChecksum(rawbytes.slice(6, 40));
    if (gotheaderchecksum != wantedheaderchecksum)
        return;

-    uint32_t wanteddatachecksum = deinterleave(ptr, 4).reader().read_be32();
-    uint32_t gotdatachecksum = checksum(rawbytes.slice(62, 1024));
+    uint32_t wanteddatachecksum = amigaDeinterleave(ptr, 4).reader().read_be32();
+    uint32_t gotdatachecksum = amigaChecksum(rawbytes.slice(62, 1024));

    _sector->data.clear();
-    _sector->data.writer().append(deinterleave(ptr, 512)).append(recoveryinfo);
+    _sector->data.writer().append(amigaDeinterleave(ptr, 512)).append(recoveryinfo);
    _sector->status = (gotdatachecksum == wanteddatachecksum) ? Sector::OK : Sector::BAD_CHECKSUM;
 }
+
+std::set<unsigned> AmigaDecoder::requiredSectors(Track& track) const
+{
+	static std::set<unsigned> sectors = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 };
+	return sectors;
+}
+
--- a/arch/amiga/encoder.cc
+++ b/arch/amiga/encoder.cc
@@ -0,0 +1,129 @@
+#include "globals.h"
+#include "record.h"
+#include "decoders/decoders.h"
+#include "encoders/encoders.h"
+#include "amiga.h"
+#include "crc.h"
+#include "sectorset.h"
+#include "writer.h"
+
+FlagGroup amigaEncoderFlags;
+
+static DoubleFlag clockRateUs(
+	{ "--clock-rate" },
+	"Encoded data clock rate (microseconds).",
+	2.00);
+
+static DoubleFlag postIndexGapMs(
+	{ "--post-index-gap" },
+	"Post-index gap before first sector header (milliseconds).",
+	0.5);
+
+static bool lastBit;
+
+static int charToInt(char c)
+{
+	if (isdigit(c))
+		return c - '0';
+	return 10 + tolower(c) - 'a';
+}
+
+static void write_bits(std::vector<bool>& bits, unsigned& cursor, const std::vector<bool>& src)
+{
+	for (bool bit : src)
+	{
+		if (cursor < bits.size())
+			bits[cursor++] = bit;
+	}
+}
+
+static void write_bits(std::vector<bool>& bits, unsigned& cursor, uint64_t data, int width)
+{
+	cursor += width;
+	for (int i=0; i<width; i++)
+	{
+		unsigned pos = cursor - i - 1;
+		if (pos < bits.size())
+			bits[pos] = data & 1;
+		data >>= 1;
+	}
+}
+
+static void write_interleaved_bytes(std::vector<bool>& bits, unsigned& cursor, const Bytes& bytes)
+{
+	assert(!(bytes.size() & 3));
+	Bytes interleaved = amigaInterleave(bytes);
+	encodeMfm(bits, cursor, interleaved, lastBit);
+}
+
+static void write_interleaved_bytes(std::vector<bool>& bits, unsigned& cursor, uint32_t data)
+{
+	Bytes b(4);
+	ByteWriter bw(b);
+	bw.write_be32(data);
+	write_interleaved_bytes(bits, cursor, b);
+}
+
+static void write_sector(std::vector<bool>& bits, unsigned& cursor, const Sector* sector)
+{
+	if ((sector->data.size() != 512) && (sector->data.size() != 528))
+		Error() << "unsupported sector size --- you must pick 512 or 528";
+
+    write_bits(bits, cursor, AMIGA_SECTOR_RECORD, 6*8);
+
+	std::vector<bool> headerBits(20*16);
+	unsigned headerCursor = 0;
+
+	Bytes header = 
+		{
+			0xff, /* Amiga 1.0 format byte */
+			(uint8_t) ((sector->logicalTrack<<1) | sector->logicalSide),
+			(uint8_t) sector->logicalSector,
+			(uint8_t) (AMIGA_SECTORS_PER_TRACK - sector->logicalSector)
+		};
+	write_interleaved_bytes(headerBits, headerCursor, header);
+	Bytes recoveryInfo(16);
+	if (sector->data.size() == 528)
+		recoveryInfo = sector->data.slice(512, 16);
+	write_interleaved_bytes(headerBits, headerCursor, recoveryInfo);
+
+	std::vector<bool> dataBits(512*16);
+	unsigned dataCursor = 0;
+	write_interleaved_bytes(dataBits, dataCursor, sector->data);
+
+	write_bits(bits, cursor, headerBits);
+	uint32_t headerChecksum = amigaChecksum(toBytes(headerBits));
+	write_interleaved_bytes(bits, cursor, headerChecksum);
+	uint32_t dataChecksum = amigaChecksum(toBytes(dataBits));
+	write_interleaved_bytes(bits, cursor, dataChecksum);
+	write_bits(bits, cursor, dataBits);
+}
+
+std::unique_ptr<Fluxmap> AmigaEncoder::encode(
+	int physicalTrack, int physicalSide, const SectorSet& allSectors)
+{
+	if ((physicalTrack < 0) || (physicalTrack >= AMIGA_TRACKS_PER_DISK))
+		return std::unique_ptr<Fluxmap>();
+
+	int bitsPerRevolution = 200000.0 / clockRateUs;
+	std::vector<bool> bits(bitsPerRevolution);
+	unsigned cursor = 0;
+
+    fillBitmapTo(bits, cursor, postIndexGapMs * 1000 / clockRateUs, { true, false });
+	lastBit = false;
+
+	for (int sectorId=0; sectorId<AMIGA_SECTORS_PER_TRACK; sectorId++)
+	{
+		const auto& sectorData = allSectors.get(physicalTrack, physicalSide, sectorId);
+		write_sector(bits, cursor, sectorData);
+    }
+
+	if (cursor >= bits.size())
+		Error() << "track data overrun";
+	fillBitmapTo(bits, cursor, bits.size(), { true, false });
+
+	std::unique_ptr<Fluxmap> fluxmap(new Fluxmap);
+	fluxmap->appendBits(bits, clockRateUs*1e3);
+	return fluxmap;
+}
+
--- a/arch/brother/brother.h
+++ b/arch/brother/brother.h
@@ -9,7 +9,8 @@
 #define BROTHER_DATA_RECORD_CHECKSUM     3
 #define BROTHER_DATA_RECORD_ENCODED_SIZE 415

-#define BROTHER_TRACKS_PER_DISK          78
+#define BROTHER_TRACKS_PER_240KB_DISK    78
+#define BROTHER_TRACKS_PER_120KB_DISK    39
 #define BROTHER_SECTORS_PER_TRACK        12

 class Sector;
@@ -28,8 +29,16 @@ public:
 class BrotherEncoder : public AbstractEncoder
 {
 public:
+	BrotherEncoder(int format, int bias):
+		_format(format),
+		_bias(bias)
+	{}
+
 	virtual ~BrotherEncoder() {}

+private:
+	int _format;
+	int _bias;
 public:
    std::unique_ptr<Fluxmap> encode(int physicalTrack, int physicalSide, const SectorSet& allSectors);
 };
--- a/arch/brother/encoder.cc
+++ b/arch/brother/encoder.cc
@@ -129,9 +129,25 @@ static int charToInt(char c)
 std::unique_ptr<Fluxmap> BrotherEncoder::encode(
 	int physicalTrack, int physicalSide, const SectorSet& allSectors)
 {
-	if ((physicalTrack < 0) || (physicalTrack >= BROTHER_TRACKS_PER_DISK)
-        || (physicalSide != 0))
+	int logicalTrack;
+	if (physicalSide != 0)
 		return std::unique_ptr<Fluxmap>();
+	physicalTrack -= _bias;
+	switch (_format)
+	{
+		case 120:
+			if ((physicalTrack < 0) || (physicalTrack >= (BROTHER_TRACKS_PER_120KB_DISK*2))
+					|| (physicalTrack & 1))
+				return std::unique_ptr<Fluxmap>();
+			logicalTrack = physicalTrack/2;
+			break;
+
+		case 240:
+			if ((physicalTrack < 0) || (physicalTrack >= BROTHER_TRACKS_PER_240KB_DISK))
+				return std::unique_ptr<Fluxmap>();
+			logicalTrack = physicalTrack;
+			break;
+	}

 	int bitsPerRevolution = 200000.0 / clockRateUs;
 	const std::string& skew = sectorSkew.get();
@@ -146,15 +162,15 @@ std::unique_ptr<Fluxmap> BrotherEncoder::encode(
 		double dataMs = headerMs + postHeaderSpacingMs;
 		unsigned dataCursor = dataMs*1e3 / clockRateUs;

-		const auto& sectorData = allSectors.get(physicalTrack, 0, sectorId);
+		const auto& sectorData = allSectors.get(logicalTrack, 0, sectorId);

 		fillBitmapTo(bits, cursor, headerCursor, { true, false });
-		write_sector_header(bits, cursor, physicalTrack, sectorId);
+		write_sector_header(bits, cursor, logicalTrack, sectorId);
 		fillBitmapTo(bits, cursor, dataCursor, { true, false });
 		write_sector_data(bits, cursor, sectorData->data);
 	}

-	if (cursor > bits.size())
+	if (cursor >= bits.size())
 		Error() << "track data overrun";
 	fillBitmapTo(bits, cursor, bits.size(), { true, false });

--- a/arch/ibm/decoder.cc
+++ b/arch/ibm/decoder.cc
@@ -57,11 +57,11 @@ const FluxPattern FM_TRS80DAM1_PATTERN(16, 0xf56b);

 /* 
 * TRS80DAM2 record:
- * flux:   XXXX-X-X-XX-XXX- = 0xf56c
+ * flux:   XXXX-X-X-XX-XXX- = 0xf56e
 * clock:  X X - - - X X X  = 0xc7
 * data:    X X X X X - X - = 0xfa
 */
-const FluxPattern FM_TRS80DAM2_PATTERN(16, 0xf56c);
+const FluxPattern FM_TRS80DAM2_PATTERN(16, 0xf56e);

 /* MFM record separator:
 * 0xA1 is:
@@ -73,8 +73,10 @@ const FluxPattern FM_TRS80DAM2_PATTERN(16, 0xf56c);
 * encoding (you can't do 10 00). So this can't be spoofed by user data.
 * 
 * shifted: 10 00 10 01 00 01 00 1
+ * 
+ * It's repeated three times.
 */
-const FluxPattern MFM_PATTERN(16, 0x4489);
+const FluxPattern MFM_PATTERN(48, 0x448944894489LL);

 const FluxMatchers ANY_RECORD_PATTERN(
    {
@@ -100,7 +102,8 @@ AbstractDecoder::RecordType IbmDecoder::advanceToNextRecord()
    if (_currentHeaderLength > 0)
        readRawBits(_currentHeaderLength*16);
    auto idbits = readRawBits(16);
-    uint8_t id = decodeFmMfm(idbits).slice(0, 1)[0];
+    const Bytes idbytes = decodeFmMfm(idbits);
+    uint8_t id = idbytes.slice(0, 1)[0];
    seek(here);
    
    switch (id)
--- a/arch/ibm/encoder.cc
+++ b/arch/ibm/encoder.cc
@@ -0,0 +1,236 @@
+#include "globals.h"
+#include "record.h"
+#include "decoders/decoders.h"
+#include "encoders/encoders.h"
+#include "ibm.h"
+#include "crc.h"
+#include "sectorset.h"
+#include "writer.h"
+#include "fmt/format.h"
+#include <ctype.h>
+
+/* IAM record separator:
+ * 0xC2 is:
+ * data:    1  1  0  0  0  0  1  0  = 0xc2
+ * mfm:     01 01 00 10 10 10 01 00 = 0x5254
+ * special: 01 01 00 10 00 10 01 00 = 0x5224
+ */
+#define MFM_IAM_SEPARATOR 0x5224
+
+/* FM IAM record:
+ * flux:   XXXX-XXX-XXXX-X- = 0xf77a
+ * clock:  X X - X - X X X  = 0xd7
+ * data:    X X X X X X - - = 0xfc
+ */
+#define FM_IAM_RECORD 0xf77a
+
+/* MFM IAM record:
+ * data:   1  1  1  1  1  1  0  0  = 0xfc
+ * flux:   01 01 01 01 01 01 00 10 = 0x5552
+ */
+#define MFM_IAM_RECORD 0x5552
+
+/* MFM record separator:
+ * 0xA1 is:
+ * data:    1  0  1  0  0  0  0  1  = 0xa1
+ * mfm:     01 00 01 00 10 10 10 01 = 0x44a9
+ * special: 01 00 01 00 10 00 10 01 = 0x4489
+ *                       ^^^^^
+ * When shifted out of phase, the special 0xa1 byte becomes an illegal
+ * encoding (you can't do 10 00). So this can't be spoofed by user data.
+ * 
+ * shifted: 10 00 10 01 00 01 00 1
+ * 
+ * It's repeated three times.
+ */
+#define MFM_RECORD_SEPARATOR 0x4489
+#define MFM_RECORD_SEPARATOR_BYTE 0xa1
+
+/* MFM IDAM byte:
+ * data:    1  1  1  1  1  1  1  0  = 0xfe
+ * mfm:     01 01 01 01 01 01 01 00 = 0x5554
+ */
+
+/* MFM DAM byte:
+ * data:    1  1  1  1  1  0  1  1  = 0xfb
+ * mfm:     01 01 01 01 01 00 01 01 = 0x5545
+ */
+
+static int charToInt(char c)
+{
+	if (isdigit(c))
+		return c - '0';
+	return 10 + tolower(c) - 'a';
+}
+
+void IbmEncoder::writeRawBits(uint32_t data, int width)
+{
+	_cursor += width;
+	_lastBit = data & 1;
+	for (int i=0; i<width; i++)
+	{
+		unsigned pos = _cursor - i - 1;
+		if (pos < _bits.size())
+			_bits[pos] = data & 1;
+		data >>= 1;
+	}
+}
+
+void IbmEncoder::writeBytes(const Bytes& bytes)
+{
+	if (_parameters.useFm)
+		encodeFm(_bits, _cursor, bytes);
+	else
+		encodeMfm(_bits, _cursor, bytes, _lastBit);
+}
+
+void IbmEncoder::writeBytes(int count, uint8_t byte)
+{
+	Bytes bytes = { byte };
+	for (int i=0; i<count; i++)
+		writeBytes(bytes);
+}
+
+static uint8_t decodeUint16(uint16_t raw)
+{
+	Bytes b;
+	ByteWriter bw(b);
+	bw.write_be16(raw);
+	return decodeFmMfm(b.toBits())[0];
+}
+
+std::unique_ptr<Fluxmap> IbmEncoder::encode(
+	int physicalTrack, int physicalSide, const SectorSet& allSectors)
+{
+	double clockRateUs = 1e3 / _parameters.clockRateKhz;
+	if (!_parameters.useFm)
+		clockRateUs /= 2.0;
+	int bitsPerRevolution = (_parameters.trackLengthMs * 1000.0) / clockRateUs;
+	_bits.resize(bitsPerRevolution);
+	_cursor = 0;
+
+	uint8_t idamUnencoded = decodeUint16(_parameters.idamByte);
+	uint8_t damUnencoded = decodeUint16(_parameters.damByte);
+
+	uint8_t sectorSize = 0;
+	{
+		int s = _parameters.sectorSize >> 7;
+		while (s > 1)
+		{
+			s >>= 1;
+			sectorSize += 1;
+		}
+	}
+
+	uint8_t gapFill = _parameters.useFm ? 0x00 : 0x4e;
+
+	writeBytes(_parameters.gap0, gapFill);
+	if (_parameters.emitIam)
+	{
+		writeBytes(_parameters.useFm ? 6 : 12, 0x00);
+		if (!_parameters.useFm)
+		{
+			for (int i=0; i<3; i++)
+				writeRawBits(MFM_IAM_SEPARATOR, 16);
+		}
+		writeRawBits(_parameters.useFm ? FM_IAM_RECORD : MFM_IAM_RECORD, 16);
+		writeBytes(_parameters.gap1, gapFill);
+	}
+
+	bool first = true;
+	for (char sectorChar : _parameters.sectorSkew)
+	{
+		int sectorId = charToInt(sectorChar);
+		if (!first)
+			writeBytes(_parameters.gap3, gapFill);
+		first = false;
+
+		const auto& sectorData = allSectors.get(physicalTrack, physicalSide, sectorId);
+		if (!sectorData)
+			Error() << fmt::format("format tried to find sector {} which wasn't in the input file", sectorId);
+
+		/* Writing the sector and data records are fantastically annoying.
+		 * The CRC is calculated from the *very start* of the record, and
+		 * include the malformed marker bytes. Our encoder doesn't know
+		 * about this, of course, with the result that we have to construct
+		 * the unencoded header, calculate the checksum, and then use the
+		 * same logic to emit the bytes which require special encoding
+		 * before encoding the rest of the header normally. */
+
+		{
+			Bytes header;
+			ByteWriter bw(header);
+
+			writeBytes(_parameters.useFm ? 6 : 12, 0x00);
+			if (!_parameters.useFm)
+			{
+				for (int i=0; i<3; i++)
+					bw.write_8(MFM_RECORD_SEPARATOR_BYTE);
+			}
+			bw.write_8(idamUnencoded);
+			bw.write_8(sectorData->logicalTrack);
+			bw.write_8(sectorData->logicalSide);
+			bw.write_8(sectorData->logicalSector + _parameters.startSectorId);
+			bw.write_8(sectorSize);
+			uint16_t crc = crc16(CCITT_POLY, header);
+			bw.write_be16(crc);
+
+			int conventionalHeaderStart = 0;
+			if (!_parameters.useFm)
+			{
+				for (int i=0; i<3; i++)
+					writeRawBits(MFM_RECORD_SEPARATOR, 16);
+				conventionalHeaderStart += 3;
+
+			}
+			writeRawBits(_parameters.idamByte, 16);
+			conventionalHeaderStart += 1;
+
+			writeBytes(header.slice(conventionalHeaderStart));
+		}
+
+		writeBytes(_parameters.gap2, gapFill);
+
+		{
+			Bytes data;
+			ByteWriter bw(data);
+
+			writeBytes(_parameters.useFm ? 6 : 12, 0x00);
+			if (!_parameters.useFm)
+			{
+				for (int i=0; i<3; i++)
+					bw.write_8(MFM_RECORD_SEPARATOR_BYTE);
+			}
+			bw.write_8(damUnencoded);
+
+			Bytes truncatedData = sectorData->data.slice(0, _parameters.sectorSize);
+			bw += truncatedData;
+			hexdump(std::cout, data.slice(0, 64));
+			uint16_t crc = crc16(CCITT_POLY, data);
+			bw.write_be16(crc);
+
+			int conventionalHeaderStart = 0;
+			if (!_parameters.useFm)
+			{
+				for (int i=0; i<3; i++)
+					writeRawBits(MFM_RECORD_SEPARATOR, 16);
+				conventionalHeaderStart += 3;
+
+			}
+			writeRawBits(_parameters.damByte, 16);
+			conventionalHeaderStart += 1;
+
+			writeBytes(data.slice(conventionalHeaderStart));
+		}
+    }
+
+	if (_cursor >= _bits.size())
+		Error() << "track data overrun";
+	while (_cursor < _bits.size())
+		writeBytes(1, gapFill);
+
+	std::unique_ptr<Fluxmap> fluxmap(new Fluxmap);
+	fluxmap->appendBits(_bits, clockRateUs*1e3);
+	return fluxmap;
+}
+
--- a/arch/ibm/ibm.h
+++ b/arch/ibm/ibm.h
@@ -2,6 +2,7 @@
 #define IBM_H

 #include "decoders/decoders.h"
+#include "encoders/encoders.h"

 /* IBM format (i.e. ordinary PC floppies). */

@@ -31,68 +32,68 @@ struct IbmIdam
 class IbmDecoder : public AbstractDecoder
 {
 public:
-    IbmDecoder(unsigned sectorBase, bool ignoreSideByte=false):
+    IbmDecoder(unsigned sectorBase, bool ignoreSideByte=false,
+			const std::set<unsigned> requiredSectors=std::set<unsigned>()):
        _sectorBase(sectorBase),
-        _ignoreSideByte(ignoreSideByte)
+        _ignoreSideByte(ignoreSideByte),
+		_requiredSectors(requiredSectors)
    {}

    RecordType advanceToNextRecord();
    void decodeSectorRecord();
    void decodeDataRecord();

+	std::set<unsigned> requiredSectors(Track& track) const
+	{ return _requiredSectors; }
+
 private:
    unsigned _sectorBase;
    bool _ignoreSideByte;
+	std::set<unsigned> _requiredSectors;
    unsigned _currentSectorSize;
    unsigned _currentHeaderLength;
 };

-#if 0
-class AbstractIbmDecoder : public AbstractSoftSectorDecoder
+struct IbmParameters
+{
+	int trackLengthMs;
+	int sectorSize;
+	bool emitIam;
+	int startSectorId;
+	int clockRateKhz;
+	bool useFm;
+	uint16_t idamByte;
+	uint16_t damByte;
+	int gap0;
+	int gap1;
+	int gap2;
+	int gap3;
+	std::string sectorSkew;
+};
+
+class IbmEncoder : public AbstractEncoder
 {
 public:
-    AbstractIbmDecoder(unsigned sectorIdBase):
-        _sectorIdBase(sectorIdBase)
-    {}
-    virtual ~AbstractIbmDecoder() {}
+	IbmEncoder(const IbmParameters& parameters):
+		_parameters(parameters)
+	{}

-    SectorVector decodeToSectors(const RawRecordVector& rawRecords, unsigned physicalTrack, unsigned physicalSide);
+	virtual ~IbmEncoder() {}

-protected:
-    virtual int skipHeaderBytes() const = 0;
+public:
+    std::unique_ptr<Fluxmap> encode(int physicalTrack, int physicalSide, const SectorSet& allSectors);

 private:
-    unsigned _sectorIdBase;
+	void writeRawBits(uint32_t data, int width);
+	void writeBytes(const Bytes& bytes);
+	void writeBytes(int count, uint8_t value);
+	void writeSync();
+	
+private:
+	IbmParameters _parameters;
+	std::vector<bool> _bits;
+	unsigned _cursor;
+	bool _lastBit;
 };

-class IbmFmDecoder : public AbstractIbmDecoder
-{
-public:
-    IbmFmDecoder(unsigned sectorIdBase):
-        AbstractIbmDecoder(sectorIdBase)
-    {}
-
-    int recordMatcher(uint64_t fifo) const;
-
-protected:
-    int skipHeaderBytes() const
-    { return 0; }
-};
-
-class IbmMfmDecoder : public AbstractIbmDecoder
-{
-public:
-    IbmMfmDecoder(unsigned sectorIdBase):
-        AbstractIbmDecoder(sectorIdBase)
-    {}
-
-    nanoseconds_t guessClock(Fluxmap& fluxmap) const;
-    int recordMatcher(uint64_t fifo) const;
-
-protected:
-    int skipHeaderBytes() const
-    { return 3; }
-};
-#endif
-
 #endif
--- a/arch/macintosh/decoder.cc
+++ b/arch/macintosh/decoder.cc
@@ -118,10 +118,10 @@ static Bytes decode_crazy_data(const Bytes& input, Sector::Status& status)
 uint8_t decode_side(uint8_t side)
 {
    /* Mac disks, being weird, use the side byte to encode both the side (in
-     * bit 5) and also whether we're above track 0x3f (in bit 6).
+     * bit 5) and also whether we're above track 0x3f (in bit 0).
     */

-    return !!(side & 0x40);
+    return !!(side & 0x20);
 }

 AbstractDecoder::RecordType MacintoshDecoder::advanceToNextRecord()
@@ -184,3 +184,25 @@ void MacintoshDecoder::decodeDataRecord()
    _sector->data.clear();
    _sector->data.writer().append(userData.slice(12, 512)).append(userData.slice(0, 12));
 }
+
+std::set<unsigned> MacintoshDecoder::requiredSectors(Track& track) const
+{
+	int count;
+	if (track.physicalTrack < 16)
+		count = 12;
+	else if (track.physicalTrack < 32)
+		count = 11;
+	else if (track.physicalTrack < 48)
+		count = 10;
+	else if (track.physicalTrack < 64)
+		count = 9;
+	else
+		count = 8;
+
+	std::set<unsigned> sectors;
+	while (count--)
+		sectors.insert(count);
+	return sectors;
+}
+
+
--- a/arch/macintosh/encoder.cc
+++ b/arch/macintosh/encoder.cc
@@ -0,0 +1,242 @@
+#include "globals.h"
+#include "record.h"
+#include "decoders/decoders.h"
+#include "encoders/encoders.h"
+#include "macintosh.h"
+#include "crc.h"
+#include "sectorset.h"
+#include "writer.h"
+#include "fmt/format.h"
+#include <ctype.h>
+
+FlagGroup macintoshEncoderFlags;
+
+static DoubleFlag postIndexGapUs(
+	{ "--post-index-gap-us" },
+	"Post-index gap before first sector header (microseconds).",
+	0);
+
+static DoubleFlag clockCompensation(
+	{ "--clock-compensation-factor" },
+	"Scale the output clock by this much.",
+	1.0);
+
+static bool lastBit;
+
+static double clockRateUsForTrack(unsigned track)
+{
+	if (track < 16)
+		return 2.623;
+	if (track < 32)
+		return 2.861;
+	if (track < 48)
+		return 3.148;
+	if (track < 64)
+		return 3.497;
+	return 3.934;
+}
+
+static unsigned sectorsForTrack(unsigned track)
+{
+	if (track < 16)
+		return 12;
+	if (track < 32)
+		return 11;
+	if (track < 48)
+		return 10;
+	if (track < 64)
+		return 9;
+	return 8;
+}
+
+static int encode_data_gcr(uint8_t gcr)
+{
+    switch (gcr)
+    {
+		#define GCR_ENTRY(gcr, data) \
+			case data: return gcr;
+		#include "data_gcr.h"
+		#undef GCR_ENTRY
+    }
+    return -1;
+};
+
+/* This is extremely inspired by the MESS implementation, written by Nathan Woods
+ * and R. Belmont: https://github.com/mamedev/mame/blob/4263a71e64377db11392c458b580c5ae83556bc7/src/lib/formats/ap_dsk35.cpp
+ */
+static Bytes encode_crazy_data(const Bytes& input)
+{
+    Bytes output;
+    ByteWriter bw(output);
+    ByteReader br(input);
+
+	uint8_t w1, w2, w3, w4;
+
+    static const int LOOKUP_LEN = MAC_SECTOR_LENGTH / 3;
+
+    uint8_t b1[LOOKUP_LEN + 1];
+    uint8_t b2[LOOKUP_LEN + 1];
+    uint8_t b3[LOOKUP_LEN + 1];
+
+	uint32_t c1 = 0;
+	uint32_t c2 = 0;
+	uint32_t c3 = 0;
+	for (int j=0;; j++)
+	{
+		c1 = (c1 & 0xff) << 1;
+		if (c1 & 0x0100)
+			c1++;
+
+		uint8_t val = br.read_8();
+		c3 += val;
+		if (c1 & 0x0100)
+		{
+			c3++;
+			c1 &= 0xff;
+		}
+		b1[j] = (val ^ c1) & 0xff;
+
+		val = br.read_8();
+		c2 += val;
+		if (c3 > 0xff)
+		{
+			c2++;
+			c3 &= 0xff;
+		}
+		b2[j] = (val ^ c3) & 0xff;
+
+		if (br.pos == 524)
+			break;
+
+		val = br.read_8();
+		c1 += val;
+		if (c2 > 0xff)
+		{
+			c1++;
+			c2 &= 0xff;
+		}
+		b3[j] = (val ^ c2) & 0xff;
+	}
+	uint32_t c4 = ((c1 & 0xc0) >> 6) | ((c2 & 0xc0) >> 4) | ((c3 & 0xc0) >> 2);
+	b3[LOOKUP_LEN] = 0;
+
+	for (int i = 0; i <= LOOKUP_LEN; i++)
+	{
+		w1 = b1[i] & 0x3f;
+		w2 = b2[i] & 0x3f;
+		w3 = b3[i] & 0x3f;
+		w4 =  ((b1[i] & 0xc0) >> 2);
+		w4 |= ((b2[i] & 0xc0) >> 4);
+		w4 |= ((b3[i] & 0xc0) >> 6);
+
+		bw.write_8(w4);
+		bw.write_8(w1);
+		bw.write_8(w2);
+
+		if (i != LOOKUP_LEN)
+			bw.write_8(w3);
+	}
+
+	bw.write_8(c4 & 0x3f);
+	bw.write_8(c3 & 0x3f);
+	bw.write_8(c2 & 0x3f);
+	bw.write_8(c1 & 0x3f);
+
+	return output;
+}
+
+static void write_bits(std::vector<bool>& bits, unsigned& cursor, const std::vector<bool>& src)
+{
+	for (bool bit : src)
+	{
+		if (cursor < bits.size())
+			bits[cursor++] = bit;
+	}
+}
+
+static void write_bits(std::vector<bool>& bits, unsigned& cursor, uint64_t data, int width)
+{
+	cursor += width;
+	for (int i=0; i<width; i++)
+	{
+		unsigned pos = cursor - i - 1;
+		if (pos < bits.size())
+			bits[pos] = data & 1;
+		data >>= 1;
+	}
+}
+
+static uint8_t encode_side(uint8_t track, uint8_t side)
+{
+    /* Mac disks, being weird, use the side byte to encode both the side (in
+     * bit 5) and also whether we're above track 0x3f (in bit 0).
+     */
+
+	return (side ? 0x20 : 0x00) | ((track>0x3f) ? 0x01 : 0x00);
+}
+
+static void write_sector(std::vector<bool>& bits, unsigned& cursor, const Sector* sector)
+{
+	if ((sector->data.size() != 512) && (sector->data.size() != 524))
+		Error() << "unsupported sector size --- you must pick 512 or 524";
+
+	write_bits(bits, cursor, 0xff, 1*8); /* pad byte */
+	for (int i=0; i<7; i++)
+		write_bits(bits, cursor, 0xff3fcff3fcffLL, 6*8); /* sync */
+	write_bits(bits, cursor, MAC_SECTOR_RECORD, 3*8);
+
+    uint8_t encodedTrack = sector->physicalTrack & 0x3f;
+	uint8_t encodedSector = sector->logicalSector;
+	uint8_t encodedSide = encode_side(sector->physicalTrack, sector->logicalSide);
+	uint8_t formatByte = MAC_FORMAT_BYTE;
+	uint8_t headerChecksum = (encodedTrack ^ encodedSector ^ encodedSide ^ formatByte) & 0x3f;
+
+	write_bits(bits, cursor, encode_data_gcr(encodedTrack), 1*8);
+	write_bits(bits, cursor, encode_data_gcr(encodedSector), 1*8);
+	write_bits(bits, cursor, encode_data_gcr(encodedSide), 1*8);
+	write_bits(bits, cursor, encode_data_gcr(formatByte), 1*8);
+	write_bits(bits, cursor, encode_data_gcr(headerChecksum), 1*8);
+
+	write_bits(bits, cursor, 0xdeaaff, 3*8);
+	write_bits(bits, cursor, 0xff3fcff3fcffLL, 6*8); /* sync */
+	write_bits(bits, cursor, MAC_DATA_RECORD, 3*8);
+	write_bits(bits, cursor, encode_data_gcr(sector->logicalSector), 1*8);
+
+	Bytes wireData;
+	wireData.writer().append(sector->data.slice(512, 12)).append(sector->data.slice(0, 512));
+	for (uint8_t b : encode_crazy_data(wireData))
+		write_bits(bits, cursor, encode_data_gcr(b), 1*8);
+
+	write_bits(bits, cursor, 0xdeaaff, 3*8);
+}
+
+std::unique_ptr<Fluxmap> MacintoshEncoder::encode(
+	int physicalTrack, int physicalSide, const SectorSet& allSectors)
+{
+	if ((physicalTrack < 0) || (physicalTrack >= MAC_TRACKS_PER_DISK))
+		return std::unique_ptr<Fluxmap>();
+
+	double clockRateUs = clockRateUsForTrack(physicalTrack) * clockCompensation;
+	int bitsPerRevolution = 200000.0 / clockRateUs;
+	std::vector<bool> bits(bitsPerRevolution);
+	unsigned cursor = 0;
+
+    fillBitmapTo(bits, cursor, postIndexGapUs / clockRateUs, { true, false });
+	lastBit = false;
+
+	unsigned numSectors = sectorsForTrack(physicalTrack);
+	for (int sectorId=0; sectorId<numSectors; sectorId++)
+	{
+		const auto& sectorData = allSectors.get(physicalTrack, physicalSide, sectorId);
+		write_sector(bits, cursor, sectorData);
+    }
+
+	if (cursor >= bits.size())
+		Error() << fmt::format("track data overrun by {} bits", cursor - bits.size());
+	fillBitmapTo(bits, cursor, bits.size(), { true, false });
+
+	std::unique_ptr<Fluxmap> fluxmap(new Fluxmap);
+	fluxmap->appendBits(bits, clockRateUs*1e3);
+	return fluxmap;
+}
+
--- a/arch/macintosh/macintosh.h
+++ b/arch/macintosh/macintosh.h
@@ -1,11 +1,17 @@
 #ifndef MACINTOSH_H
 #define MACINTOSH_H

+#include "decoders/decoders.h"
+#include "encoders/encoders.h"
+
 #define MAC_SECTOR_RECORD   0xd5aa96 /* 1101 0101 1010 1010 1001 0110 */
 #define MAC_DATA_RECORD     0xd5aaad /* 1101 0101 1010 1010 1010 1101 */

 #define MAC_SECTOR_LENGTH   524 /* yes, really */
 #define MAC_ENCODED_SECTOR_LENGTH 703
+#define MAC_FORMAT_BYTE     0x22
+
+#define MAC_TRACKS_PER_DISK 80

 class Sector;
 class Fluxmap;
@@ -18,7 +24,21 @@ public:
    RecordType advanceToNextRecord();
    void decodeSectorRecord();
    void decodeDataRecord();
+
+	std::set<unsigned> requiredSectors(Track& track) const;
 };

+class MacintoshEncoder : public AbstractEncoder
+{
+public:
+	virtual ~MacintoshEncoder() {}
+
+public:
+    std::unique_ptr<Fluxmap> encode(int physicalTrack, int physicalSide, const SectorSet& allSectors);
+};
+
+extern FlagGroup macintoshEncoderFlags;
+
+
 #endif

--- a/arch/micropolis/decoder.cc
+++ b/arch/micropolis/decoder.cc
@@ -0,0 +1,61 @@
+#include "globals.h"
+#include "fluxmap.h"
+#include "decoders/fluxmapreader.h"
+#include "decoders/decoders.h"
+#include "sector.h"
+#include "micropolis.h"
+#include "bytes.h"
+#include "fmt/format.h"
+
+/* The sector has a preamble of MFM 0x00s and uses 0xFF as a sync pattern. */
+static const FluxPattern SECTOR_SYNC_PATTERN(32, 0xaaaa5555);
+
+AbstractDecoder::RecordType MicropolisDecoder::advanceToNextRecord()
+{
+	_fmr->seekToIndexMark();
+	const FluxMatcher* matcher = nullptr;
+	_sector->clock = _fmr->seekToPattern(SECTOR_SYNC_PATTERN, matcher);
+	if (matcher == &SECTOR_SYNC_PATTERN) {
+		readRawBits(16);
+		return SECTOR_RECORD;
+	}
+	return UNKNOWN_RECORD;
+}
+
+/* Adds all bytes, with carry. */
+static uint8_t checksum(const Bytes& bytes) {
+	ByteReader br(bytes);
+	uint16_t sum = 0;
+	while (!br.eof()) {
+		if (sum > 0xFF) {
+			sum -= 0x100 - 1;
+		}
+		sum += br.read_8();
+	}
+	/* The last carry is ignored */
+	return sum & 0xFF;
+}
+
+void MicropolisDecoder::decodeSectorRecord()
+{
+	auto rawbits = readRawBits(MICROPOLIS_ENCODED_SECTOR_SIZE*16);
+	auto bytes = decodeFmMfm(rawbits).slice(0, MICROPOLIS_ENCODED_SECTOR_SIZE);
+	ByteReader br(bytes);
+
+	br.read_8();  /* sync */
+	_sector->logicalTrack = br.read_8();
+	_sector->logicalSide = _sector->physicalSide;
+	_sector->logicalSector = br.read_8();
+	if (_sector->logicalSector > 15)
+		return;
+	if (_sector->logicalTrack > 77)
+		return;
+
+	br.read(10);  /* OS data or padding */
+	_sector->data = br.read(256);
+	uint8_t wantChecksum = br.read_8();
+	uint8_t gotChecksum = checksum(bytes.slice(1, 2+266));
+	br.read(5);  /* 4 byte ECC and ECC-present flag */
+
+	_sector->status = (wantChecksum == gotChecksum) ? Sector::OK : Sector::BAD_CHECKSUM;
+}
--- a/arch/micropolis/micropolis.h
+++ b/arch/micropolis/micropolis.h
@@ -0,0 +1,18 @@
+#ifndef ZILOGMCZ_H
+#define ZILOGMCZ_H
+
+#define MICROPOLIS_ENCODED_SECTOR_SIZE (1+2+266+6)
+
+class Sector;
+class Fluxmap;
+
+class MicropolisDecoder : public AbstractDecoder
+{
+public:
+	virtual ~MicropolisDecoder() {}
+
+	RecordType advanceToNextRecord();
+	void decodeSectorRecord();
+};
+
+#endif
--- a/arch/mx/decoder.cc
+++ b/arch/mx/decoder.cc
@@ -37,7 +37,7 @@ AbstractDecoder::RecordType MxDecoder::advanceToNextRecord()
        const FluxMatcher* matcher = nullptr;
        _sector->clock = _clock = _fmr->seekToPattern(ID_PATTERN, matcher);
        readRawBits(32); /* skip the ID mark */
-        _logicalTrack = decodeFmMfm(readRawBits(32)).reader().read_be16();
+        _logicalTrack = decodeFmMfm(readRawBits(32)).slice(0, 32).reader().read_be16();
    }
    else if (_currentSector == 10)
    {
--- a/arch/tids990/decoder.cc
+++ b/arch/tids990/decoder.cc
@@ -0,0 +1,87 @@
+#include "globals.h"
+#include "decoders/decoders.h"
+#include "encoders/encoders.h"
+#include "tids990/tids990.h"
+#include "crc.h"
+#include "fluxmap.h"
+#include "decoders/fluxmapreader.h"
+#include "sector.h"
+#include "record.h"
+#include "track.h"
+#include <string.h>
+#include <fmt/format.h>
+
+/* The Texas Instruments DS990 uses MFM with a scheme similar to a simplified
+ * version of the IBM record scheme (it's actually easier to parse than IBM).
+ * There are 26 sectors per track, each holding a rather weird 288 bytes.
+ */
+
+/*
+ * Sector record:
+ * data:    0  1  0  1  0  1  0  1 .0  0  0  0  1  0  1  0  = 0x550a
+ * mfm:     00 01 00 01 00 01 00 01.00 10 10 10 01 00 01 00 = 0x11112a44
+ * special: 00 01 00 01 00 01 00 01.00 10 00 10 01 00 01 00 = 0x11112244
+ *                                        ^^
+ * When shifted out of phase, the special 0xa1 byte becomes an illegal
+ * encoding (you can't do 10 00). So this can't be spoofed by user data.
+ */
+const FluxPattern SECTOR_RECORD_PATTERN(32, 0x11112244);
+
+/*
+ * Data record:
+ * data:    0  1  0  1  0  1  0  1 .0  0  0  0  1  0  1  1  = 0x550c
+ * mfm:     00 01 00 01 00 01 00 01.00 10 10 10 01 00 01 01 = 0x11112a45
+ * special: 00 01 00 01 00 01 00 01.00 10 00 10 01 00 01 01 = 0x11112245
+ *                                        ^^
+ * When shifted out of phase, the special 0xa1 byte becomes an illegal
+ * encoding (you can't do 10 00). So this can't be spoofed by user data.
+ */
+const FluxPattern DATA_RECORD_PATTERN(32, 0x11112245);
+
+const FluxMatchers ANY_RECORD_PATTERN({ &SECTOR_RECORD_PATTERN, &DATA_RECORD_PATTERN });
+
+AbstractDecoder::RecordType TiDs990Decoder::advanceToNextRecord()
+{
+	const FluxMatcher* matcher = nullptr;
+	_sector->clock = _fmr->seekToPattern(ANY_RECORD_PATTERN, matcher);
+	if (matcher == &SECTOR_RECORD_PATTERN)
+		return RecordType::SECTOR_RECORD;
+	if (matcher == &DATA_RECORD_PATTERN)
+		return RecordType::DATA_RECORD;
+	return RecordType::UNKNOWN_RECORD;
+}
+
+void TiDs990Decoder::decodeSectorRecord()
+{
+    auto bits = readRawBits(TIDS990_SECTOR_RECORD_SIZE*16);
+    auto bytes = decodeFmMfm(bits).slice(0, TIDS990_SECTOR_RECORD_SIZE);
+
+    ByteReader br(bytes);
+	uint16_t gotChecksum = crc16(CCITT_POLY, bytes.slice(1, TIDS990_SECTOR_RECORD_SIZE-3));
+
+	br.seek(2);
+	_sector->logicalSide = br.read_8() >> 3;
+	_sector->logicalTrack = br.read_8();
+	br.read_8(); /* number of sectors per track */
+	_sector->logicalSector = br.read_8();
+	br.read_be16(); /* sector size */
+    uint16_t wantChecksum = br.read_be16();
+
+    if (wantChecksum == gotChecksum)
+        _sector->status = Sector::DATA_MISSING; /* correct but unintuitive */
+}
+
+void TiDs990Decoder::decodeDataRecord()
+{
+	auto bits = readRawBits(TIDS990_DATA_RECORD_SIZE*16);
+	auto bytes = decodeFmMfm(bits).slice(0, TIDS990_DATA_RECORD_SIZE);
+
+	ByteReader br(bytes);
+	uint16_t gotChecksum = crc16(CCITT_POLY, bytes.slice(1, TIDS990_DATA_RECORD_SIZE-3));
+
+	br.seek(2);
+	_sector->data = br.read(TIDS990_PAYLOAD_SIZE);
+	uint16_t wantChecksum = br.read_be16();
+    _sector->status = (wantChecksum == gotChecksum) ? Sector::OK : Sector::BAD_CHECKSUM;
+}
+
--- a/arch/tids990/encoder.cc
+++ b/arch/tids990/encoder.cc
@@ -0,0 +1,176 @@
+#include "globals.h"
+#include "record.h"
+#include "decoders/decoders.h"
+#include "encoders/encoders.h"
+#include "tids990.h"
+#include "crc.h"
+#include "sectorset.h"
+#include "writer.h"
+#include <fmt/format.h>
+
+FlagGroup tids990EncoderFlags;
+
+static IntFlag trackLengthMs(
+	{ "--tids990-track-length-ms" },
+	"Length of a track in milliseconds.",
+	166);
+
+static IntFlag sectorCount(
+	{ "--tids990-sector-count" },
+	"Number of sectors per track.",
+	26);
+
+static IntFlag clockRateKhz(
+	{ "--tids990-clock-rate-khz" },
+	"Clock rate of data to write.",
+	500);
+
+static HexIntFlag am1Byte(
+	{ "--tids990-am1-byte" },
+	"16-bit RAW bit pattern to use for the AM1 ID byte",
+	0x2244);
+
+static HexIntFlag am2Byte(
+	{ "--tids990-am2-byte" },
+	"16-bit RAW bit pattern to use for the AM2 ID byte",
+	0x2245);
+
+static IntFlag gap1(
+	{ "--tids990-gap1-bytes" },
+	"Size of gap 1 (the post-index gap).",
+	80);
+
+static IntFlag gap2(
+	{ "--tids990-gap2-bytes" },
+	"Size of gap 2 (the post-ID gap).",
+	21);
+
+static IntFlag gap3(
+	{ "--tids990-gap3-bytes" },
+	"Size of gap 3 (the post-data or format gap).",
+	51);
+
+static StringFlag sectorSkew(
+	{ "--tids990-sector-skew" },
+	"Order to emit sectors.",
+	"1mhc72nid83oje94pkfa50lgb6");
+
+static int charToInt(char c)
+{
+	if (isdigit(c))
+		return c - '0';
+	return 10 + tolower(c) - 'a';
+}
+
+void TiDs990Encoder::writeRawBits(uint32_t data, int width)
+{
+	_cursor += width;
+	_lastBit = data & 1;
+	for (int i=0; i<width; i++)
+	{
+		unsigned pos = _cursor - i - 1;
+		if (pos < _bits.size())
+			_bits[pos] = data & 1;
+		data >>= 1;
+	}
+}
+
+void TiDs990Encoder::writeBytes(const Bytes& bytes)
+{
+	encodeMfm(_bits, _cursor, bytes, _lastBit);
+}
+
+void TiDs990Encoder::writeBytes(int count, uint8_t byte)
+{
+	Bytes bytes = { byte };
+	for (int i=0; i<count; i++)
+		writeBytes(bytes);
+}
+
+static uint8_t decodeUint16(uint16_t raw)
+{
+	Bytes b;
+	ByteWriter bw(b);
+	bw.write_be16(raw);
+	return decodeFmMfm(b.toBits())[0];
+}
+
+std::unique_ptr<Fluxmap> TiDs990Encoder::encode(
+	int physicalTrack, int physicalSide, const SectorSet& allSectors)
+{
+	double clockRateUs = 1e3 / clockRateKhz / 2.0;
+	int bitsPerRevolution = (trackLengthMs * 1000.0) / clockRateUs;
+	_bits.resize(bitsPerRevolution);
+	_cursor = 0;
+
+	uint8_t am1Unencoded = decodeUint16(am1Byte);
+	uint8_t am2Unencoded = decodeUint16(am2Byte);
+
+	writeBytes(gap1, 0x55);
+
+	bool first = true;
+	for (char sectorChar : sectorSkew.get())
+	{
+		int sectorId = charToInt(sectorChar);
+		if (!first)
+			writeBytes(gap3, 0x55);
+		first = false;
+
+		const auto& sectorData = allSectors.get(physicalTrack, physicalSide, sectorId);
+		if (!sectorData)
+			Error() << fmt::format("format tried to find sector {} which wasn't in the input file", sectorId);
+
+		/* Writing the sector and data records are fantastically annoying.
+		 * The CRC is calculated from the *very start* of the record, and
+		 * include the malformed marker bytes. Our encoder doesn't know
+		 * about this, of course, with the result that we have to construct
+		 * the unencoded header, calculate the checksum, and then use the
+		 * same logic to emit the bytes which require special encoding
+		 * before encoding the rest of the header normally. */
+
+		{
+			Bytes header;
+			ByteWriter bw(header);
+
+			writeBytes(12, 0x55);
+			bw.write_8(am1Unencoded);
+			bw.write_8(sectorData->logicalSide << 3);
+			bw.write_8(sectorData->logicalTrack);
+			bw.write_8(sectorCount);
+			bw.write_8(sectorData->logicalSector);
+			bw.write_be16(sectorData->data.size());
+			uint16_t crc = crc16(CCITT_POLY, header);
+			bw.write_be16(crc);
+
+			writeRawBits(am1Byte, 16);
+			writeBytes(header.slice(1));
+		}
+
+		writeBytes(gap2, 0x55);
+
+		{
+			Bytes data;
+			ByteWriter bw(data);
+
+			writeBytes(12, 0x55);
+			bw.write_8(am2Unencoded);
+
+			bw += sectorData->data;
+			uint16_t crc = crc16(CCITT_POLY, data);
+			bw.write_be16(crc);
+
+			writeRawBits(am2Byte, 16);
+			writeBytes(data.slice(1));
+		}
+    }
+
+	if (_cursor >= _bits.size())
+		Error() << "track data overrun";
+	while (_cursor < _bits.size())
+		writeBytes(1, 0x55);
+	
+	std::unique_ptr<Fluxmap> fluxmap(new Fluxmap);
+	fluxmap->appendBits(_bits, clockRateUs*1e3);
+	return fluxmap;
+}
+
--- a/arch/tids990/tids990.h
+++ b/arch/tids990/tids990.h
@@ -0,0 +1,47 @@
+#ifndef TIDS990_H
+#define TIDS990_H
+
+#define TIDS990_PAYLOAD_SIZE       288 /* bytes */
+#define TIDS990_SECTOR_RECORD_SIZE 10 /* bytes */
+#define TIDS990_DATA_RECORD_SIZE   (TIDS990_PAYLOAD_SIZE + 4) /* bytes */
+
+class Sector;
+class SectorSet;
+class Fluxmap;
+class Track;
+
+class TiDs990Decoder : public AbstractDecoder
+{
+public:
+    virtual ~TiDs990Decoder() {}
+
+    RecordType advanceToNextRecord();
+    void decodeSectorRecord();
+	void decodeDataRecord();
+};
+
+class TiDs990Encoder : public AbstractEncoder
+{
+public:
+	virtual ~TiDs990Encoder() {}
+
+private:
+	void writeRawBits(uint32_t data, int width);
+	void writeBytes(const Bytes& bytes);
+	void writeBytes(int count, uint8_t value);
+	void writeSync();
+
+public:
+    std::unique_ptr<Fluxmap> encode(int physicalTrack, int physicalSide, const SectorSet& allSectors);
+
+private:
+	std::vector<bool> _bits;
+	unsigned _cursor;
+	bool _lastBit;
+};
+
+extern FlagGroup tids990EncoderFlags;
+
+#endif
+
+
--- a/dep/agg/AUTHORS
+++ b/dep/agg/AUTHORS
@@ -0,0 +1,2 @@
+Anti-Grain Geometry - Version 2.4
+Copyright (C) 2002-2005 Maxim Shemanarev (McSeem) 
--- a/dep/agg/README
+++ b/dep/agg/README
@@ -0,0 +1,63 @@
+The Anti-Grain Geometry Project
+A high quality rendering engine for C++
+http://antigrain.com
+
+Anti-Grain Geometry - Version 2.4
+Copyright (C) 2002-2005 Maxim Shemanarev (McSeem)
+
+Permission to copy, use, modify, sell and distribute this software
+is granted provided this copyright notice appears in all copies.
+This software is provided "as is" without express or implied
+warranty, and with no claim as to its suitability for any purpose.
+
+---------------------------------
+
+Use automake to build the library.
+
+If automake is not available you still can use the old make.
+There is a very simple Makefile that can be used. Note that
+if you use automake it will overwrite Makefile.
+
+---------------------------------
+
+If building on AmigaOS 4.0 or higher type the following for
+instructions on what targets are available.
+ make -f Makefile.AmigaOS
+
+To just build and install AGG into the standard AmigaOS SDK
+ready for use type:
+ make -f Makefile.AmigaOS install
+
+If you just want to build one demo (e.g. lion) use:
+ make -f Makefile.AmigaOS bin/lion
+
+If you have any questions about the AmigaOS port please
+contact Steven Solie (ssolie@telus.net) for help.
+
+---------------------------------
+
+To build all examples using SDL (Mac or Linux) just type:
+
+cd /examples/sdl
+make
+
+Individual examples can be built with
+
+make aa_test
+
+In the same way the native Carbon examples can be built with
+
+cd /examples/macosx_carbon
+make
+
+In both cases the static library will be built (if it was not already) 
+from the existing global Makefile in /src/.
+
+The Makefiles for both SDL and Carbon will also attempt to download the 
+required .bmp files if they are not found in the system for a given 
+example. If the files could not be fetched (wget) the user will receive 
+a message explaining where to download the samples from (sphere.bmp, 
+etc.)  Since all programs reside in the same directory there is no need 
+to duplicate the .bmp files for each program that needs to use them.
+
+---------------------------------
--- a/dep/agg/README.md
+++ b/dep/agg/README.md
@@ -0,0 +1,7 @@
+This is a vary stripped down copy of the Anti-Grain Antialiasing graphics
+rendering library --- I've removed all the platform-specific and control stuff
+so that it can be used to generate memory images only.
+
+The original AGG site is dead, so this version is cloned from
+https://github.com/NNemec/antigrain.
+
--- a/dep/agg/UPSTREAM.md
+++ b/dep/agg/UPSTREAM.md
@@ -0,0 +1,7 @@
+This is a vary stripped down copy of the Anti-Grain Antialiasing graphics
+rendering library --- I've removed all the platform-specific and control stuff
+so that it can be used to generate memory images only.
+
+The original AGG site is dead, so this version is cloned from
+https://github.com/NNemec/antigrain.
+
--- a/dep/agg/include/Makefile.am
+++ b/dep/agg/include/Makefile.am
@@ -0,0 +1,49 @@
+SUBDIRS = ctrl util platform 
+
+aggincludedir = $(includedir)/agg2
+agginclude_HEADERS = \
+	agg_alpha_mask_u8.h          agg_glyph_raster_bin.h          agg_span_allocator.h \
+	agg_arc.h                    agg_gsv_text.h                  agg_span_converter.h \
+	agg_array.h                  agg_image_accessors.h           agg_span_gouraud.h \
+	agg_arrowhead.h              agg_image_filters.h             agg_span_gouraud_gray.h \
+	agg_basics.h                 agg_line_aa_basics.h            agg_span_gouraud_rgba.h \
+	agg_bezier_arc.h             agg_math.h                      agg_span_gradient.h \
+	agg_bitset_iterator.h        agg_blur.h                      agg_math_stroke.h \
+	agg_span_gradient_alpha.h    agg_gradient_lut.h \
+	agg_bounding_rect.h          agg_path_length.h               agg_span_image_filter.h \
+	agg_bspline.h                agg_path_storage.h              agg_span_image_filter_gray.h \
+	agg_clip_liang_barsky.h      agg_path_storage_integer.h      agg_span_image_filter_rgb.h \
+	agg_color_gray.h             agg_pattern_filters_rgba.h      agg_span_image_filter_rgba.h \
+	agg_color_rgba.h             agg_pixfmt_amask_adaptor.h      agg_span_interpolator_adaptor.h \
+	agg_config.h                 agg_pixfmt_gray.h               agg_span_interpolator_linear.h \
+	agg_conv_adaptor_vcgen.h     agg_pixfmt_rgb.h                agg_span_interpolator_persp.h \
+	agg_conv_adaptor_vpgen.h     agg_pixfmt_rgb_packed.h         agg_span_interpolator_trans.h \
+	agg_conv_bspline.h           agg_pixfmt_rgba.h               agg_pixfmt_transposer.h \
+	agg_span_pattern_gray.h \
+	agg_conv_clip_polygon.h      agg_rasterizer_cells_aa.h       agg_span_pattern_rgb.h \
+	agg_conv_clip_polyline.h     agg_rasterizer_compound_aa.h    agg_span_pattern_rgba.h \
+	agg_conv_close_polygon.h     agg_rasterizer_outline.h        agg_span_solid.h \
+	agg_conv_concat.h            agg_rasterizer_outline_aa.h     agg_span_subdiv_adaptor.h \
+	agg_conv_contour.h           agg_rasterizer_scanline_aa.h    agg_trans_affine.h \
+	agg_conv_curve.h             agg_rasterizer_sl_clip.h        agg_trans_bilinear.h \
+	agg_conv_dash.h              agg_renderer_base.h             agg_trans_double_path.h \
+	agg_conv_gpc.h               agg_renderer_markers.h \
+	agg_conv_marker.h            agg_renderer_mclip.h            agg_trans_perspective.h \
+	agg_conv_marker_adaptor.h    agg_renderer_outline_aa.h       agg_trans_single_path.h \
+	agg_conv_segmentator.h       agg_renderer_outline_image.h    agg_trans_viewport.h \
+	agg_conv_shorten_path.h      agg_renderer_primitives.h       agg_trans_warp_magnifier.h \
+	agg_conv_smooth_poly1.h      agg_renderer_raster_text.h      agg_vcgen_bspline.h \
+	agg_conv_stroke.h            agg_renderer_scanline.h         agg_vcgen_contour.h \
+	agg_conv_transform.h         agg_rendering_buffer.h          agg_vcgen_dash.h \
+	agg_conv_unclose_polygon.h   agg_rendering_buffer_dynarow.h  agg_vcgen_markers_term.h \
+	agg_curves.h                 agg_rounded_rect.h              agg_vcgen_smooth_poly1.h \
+	                             agg_scanline_bin.h              agg_vcgen_stroke.h \
+	agg_dda_line.h               agg_scanline_boolean_algebra.h  agg_vcgen_vertex_sequence.h \
+	agg_ellipse.h                agg_scanline_p.h                agg_vertex_sequence.h \
+	agg_ellipse_bresenham.h      agg_scanline_storage_aa.h       agg_vpgen_clip_polygon.h \
+	agg_embedded_raster_fonts.h  agg_scanline_storage_bin.h      agg_vpgen_clip_polyline.h \
+	agg_font_cache_manager.h     agg_scanline_u.h                agg_vpgen_segmentator.h \
+	agg_gamma_functions.h        agg_shorten_path.h \
+	agg_gamma_lut.h              agg_simul_eq.h \
+	agg_font_cache_manager2.h    agg_pixfmt_base.h               agg_rasterizer_scanline_aa_nogamma.h \
+	agg_span_gradient_contour.h  agg_span_gradient_image.h
--- a/dep/agg/include/agg2d.h
+++ b/dep/agg/include/agg2d.h
@@ -0,0 +1,568 @@
+//----------------------------------------------------------------------------
+// Agg2D - Version 1.0
+// Based on Anti-Grain Geometry
+// Copyright (C) 2005 Maxim Shemanarev (http://www.antigrain.com)
+//
+// Permission to copy, use, modify, sell and distribute this software
+// is granted provided this copyright notice appears in all copies.
+// This software is provided "as is" without express or implied
+// warranty, and with no claim as to its suitability for any purpose.
+//
+//----------------------------------------------------------------------------
+// Contact: mcseem@antigrain.com
+//          mcseemagg@yahoo.com
+//          http://www.antigrain.com
+//----------------------------------------------------------------------------
+//----------------------------------------------------------------------------
+//
+//	25 Jan 2007 - Ported to AGG 2.4 Jerry Evans (jerry@novadsp.com)
+//
+//----------------------------------------------------------------------------
+
+#ifndef AGG2D_INCLUDED
+#define AGG2D_INCLUDED
+
+// With this define uncommented you can use floating-point pixel format
+//#define AGG2D_USE_FLOAT_FORMAT
+
+#include "agg_basics.h"
+#include "agg_trans_affine.h"
+#include "agg_trans_viewport.h"
+#include "agg_path_storage.h"
+#include "agg_conv_stroke.h"
+#include "agg_conv_transform.h"
+#include "agg_conv_curve.h"
+#include "agg_rendering_buffer.h"
+#include "agg_renderer_base.h"
+#include "agg_renderer_scanline.h"
+#include "agg_span_gradient.h"
+#include "agg_span_image_filter_rgba.h"
+#include "agg_span_allocator.h"
+#include "agg_span_converter.h"
+#include "agg_span_interpolator_linear.h"
+#include "agg_rasterizer_scanline_aa.h"
+#include "agg_gamma_functions.h"
+#include "agg_scanline_u.h"
+#include "agg_bezier_arc.h"
+#include "agg_rounded_rect.h"
+#include "agg_font_cache_manager.h"
+
+#include "agg_pixfmt_rgba.h"
+#include "agg_image_accessors.h"
+#include <string>
+
+class Agg2D
+{
+#ifdef AGG2D_USE_FLOAT_FORMAT
+    typedef agg::rgba32 ColorType;
+#else
+    typedef agg::rgba8  ColorType;
+#endif
+    typedef agg::order_bgra ComponentOrder; // Platform dependent!
+    typedef agg::blender_rgba<ColorType, ComponentOrder>             Blender;
+    typedef agg::comp_op_adaptor_rgba<ColorType, ComponentOrder>     BlenderComp;
+    typedef agg::blender_rgba_pre<ColorType, ComponentOrder>         BlenderPre;
+    typedef agg::comp_op_adaptor_rgba_pre<ColorType, ComponentOrder> BlenderCompPre;
+
+    typedef agg::pixfmt_alpha_blend_rgba<Blender, agg::rendering_buffer>         PixFormat;
+    typedef agg::pixfmt_custom_blend_rgba<BlenderComp, agg::rendering_buffer>    PixFormatComp;
+    typedef agg::pixfmt_alpha_blend_rgba<BlenderPre, agg::rendering_buffer>      PixFormatPre;
+    typedef agg::pixfmt_custom_blend_rgba<BlenderCompPre, agg::rendering_buffer> PixFormatCompPre;
+
+    typedef agg::renderer_base<PixFormat>        RendererBase;
+    typedef agg::renderer_base<PixFormatComp>    RendererBaseComp;
+    typedef agg::renderer_base<PixFormatPre>     RendererBasePre;
+    typedef agg::renderer_base<PixFormatCompPre> RendererBaseCompPre;
+
+    typedef agg::renderer_scanline_aa_solid<RendererBase>     RendererSolid;
+    typedef agg::renderer_scanline_aa_solid<RendererBaseComp> RendererSolidComp;
+
+    typedef agg::span_allocator<ColorType> SpanAllocator;
+    typedef agg::pod_auto_array<ColorType, 256> GradientArray;
+
+    typedef agg::span_gradient<ColorType, agg::span_interpolator_linear<>, agg::gradient_x,      GradientArray> LinearGradientSpan;
+    typedef agg::span_gradient<ColorType, agg::span_interpolator_linear<>, agg::gradient_circle, GradientArray> RadialGradientSpan;
+
+    typedef agg::conv_curve<agg::path_storage>    ConvCurve;
+    typedef agg::conv_stroke<ConvCurve>           ConvStroke;
+    typedef agg::conv_transform<ConvCurve>        PathTransform;
+    typedef agg::conv_transform<ConvStroke>       StrokeTransform;
+
+    enum Gradient
+    {
+        Solid,
+        Linear,
+        Radial
+    };
+
+public:
+    friend class Agg2DRenderer;
+
+    // Use srgba8 as the "user" color type, even though the underlying color type 
+    // might be something else, such as rgba32. This allows code based on 
+    // 8-bit sRGB values to carry on working as before.
+    typedef agg::srgba8       Color;
+    typedef agg::rect_i       Rect;
+    typedef agg::rect_d       RectD;
+    typedef agg::trans_affine Affine;
+
+    enum LineJoin
+    {
+        JoinMiter = agg::miter_join,
+        JoinRound = agg::round_join,
+        JoinBevel = agg::bevel_join
+    };
+
+    enum LineCap
+    {
+        CapButt   = agg::butt_cap,
+        CapSquare = agg::square_cap,
+        CapRound  = agg::round_cap
+    };
+
+    enum TextAlignment
+    {
+        AlignLeft,
+        AlignRight,
+        AlignCenter,
+    };
+
+
+    enum DrawPathFlag
+    {
+        FillOnly,
+        StrokeOnly,
+        FillAndStroke,
+        FillWithLineColor
+    };
+
+    enum ViewportOption
+    {
+        Anisotropic,
+        XMinYMin,
+        XMidYMin,
+        XMaxYMin,
+        XMinYMid,
+        XMidYMid,
+        XMaxYMid,
+        XMinYMax,
+        XMidYMax,
+        XMaxYMax
+    };
+
+    struct Transformations
+    {
+        double affineMatrix[6];
+    };
+
+
+    struct Image
+    {
+        agg::rendering_buffer renBuf;
+
+        Image() {}
+        Image(unsigned char* buf, unsigned width, unsigned height, int stride) :
+            renBuf(buf, width, height, stride) {}
+        void attach(unsigned char* buf, unsigned width, unsigned height, int stride)
+        {
+            renBuf.attach(buf, width, height, stride);
+        }
+        int width()  const { return renBuf.width(); }
+        int height() const { return renBuf.height(); }
+        void premultiply();
+        void demultiply();
+    };
+
+    enum ImageFilter
+    {
+        NoFilter,
+        Bilinear,
+        Hanning,
+        Hermite,
+        Quadric,
+        Bicubic,
+        Catrom,
+        Spline16,
+        Spline36,
+        Blackman144
+    };
+
+    enum ImageResample
+    {
+        NoResample,
+        ResampleAlways,
+        ResampleOnZoomOut
+    };
+
+    enum FontCacheType
+    {
+        RasterFontCache,
+        VectorFontCache
+    };
+
+    enum BlendMode
+    {
+        BlendAlpha      = agg::end_of_comp_op_e,
+        BlendClear      = agg::comp_op_clear,
+        BlendSrc        = agg::comp_op_src,
+        BlendDst        = agg::comp_op_dst,
+        BlendSrcOver    = agg::comp_op_src_over,
+        BlendDstOver    = agg::comp_op_dst_over,
+        BlendSrcIn      = agg::comp_op_src_in,
+        BlendDstIn      = agg::comp_op_dst_in,
+        BlendSrcOut     = agg::comp_op_src_out,
+        BlendDstOut     = agg::comp_op_dst_out,
+        BlendSrcAtop    = agg::comp_op_src_atop,
+        BlendDstAtop    = agg::comp_op_dst_atop,
+        BlendXor        = agg::comp_op_xor,
+        BlendAdd        = agg::comp_op_plus,
+        BlendMultiply   = agg::comp_op_multiply,
+        BlendScreen     = agg::comp_op_screen,
+        BlendOverlay    = agg::comp_op_overlay,
+        BlendDarken     = agg::comp_op_darken,
+        BlendLighten    = agg::comp_op_lighten,
+        BlendColorDodge = agg::comp_op_color_dodge,
+        BlendColorBurn  = agg::comp_op_color_burn,
+        BlendHardLight  = agg::comp_op_hard_light,
+        BlendSoftLight  = agg::comp_op_soft_light,
+        BlendDifference = agg::comp_op_difference,
+        BlendExclusion  = agg::comp_op_exclusion,
+    };
+
+    enum Direction
+    {
+        CW, CCW
+    };
+
+    ~Agg2D();
+    Agg2D();
+
+    // Setup
+    //-----------------------
+    void  attach(unsigned char* buf, unsigned width, unsigned height, int stride);
+    void  attach(Image& img);
+
+    void  clipBox(double x1, double y1, double x2, double y2);
+    RectD clipBox() const;
+
+    void  clearAll(Color c);
+    void  clearAll(unsigned r, unsigned g, unsigned b, unsigned a = 255);
+
+    void  clearClipBox(Color c);
+    void  clearClipBox(unsigned r, unsigned g, unsigned b, unsigned a = 255);
+
+    // Conversions
+    //-----------------------
+    void   worldToScreen(double& x, double& y) const;
+    void   screenToWorld(double& x, double& y) const;
+    double worldToScreen(double scalar) const;
+    double screenToWorld(double scalar) const;
+    void   alignPoint(double& x, double& y) const;
+    bool   inBox(double worldX, double worldY) const;
+
+    // General Attributes
+    //-----------------------
+    void blendMode(BlendMode m);
+    BlendMode blendMode() const;
+
+    void imageBlendMode(BlendMode m);
+    BlendMode imageBlendMode() const;
+
+    void imageBlendColor(Color c);
+    void imageBlendColor(unsigned r, unsigned g, unsigned b, unsigned a = 255);
+    Color imageBlendColor() const;
+
+    void masterAlpha(double a);
+    double masterAlpha() const;
+
+    void antiAliasGamma(double g);
+    double antiAliasGamma() const;
+
+    void fillColor(Color c);
+    void fillColor(unsigned r, unsigned g, unsigned b, unsigned a = 255);
+    void noFill();
+
+    void lineColor(Color c);
+    void lineColor(unsigned r, unsigned g, unsigned b, unsigned a = 255);
+    void noLine();
+
+    Color fillColor() const;
+    Color lineColor() const;
+
+    void fillLinearGradient(double x1, double y1, double x2, double y2, Color c1, Color c2, double profile=1.0);
+    void lineLinearGradient(double x1, double y1, double x2, double y2, Color c1, Color c2, double profile=1.0);
+
+    void fillRadialGradient(double x, double y, double r, Color c1, Color c2, double profile=1.0);
+    void lineRadialGradient(double x, double y, double r, Color c1, Color c2, double profile=1.0);
+
+    void fillRadialGradient(double x, double y, double r, Color c1, Color c2, Color c3);
+    void lineRadialGradient(double x, double y, double r, Color c1, Color c2, Color c3);
+
+    void fillRadialGradient(double x, double y, double r);
+    void lineRadialGradient(double x, double y, double r);
+
+    void lineWidth(double w);
+    double lineWidth(double w) const;
+
+    void lineCap(LineCap cap);
+    LineCap lineCap() const;
+
+    void lineJoin(LineJoin join);
+    LineJoin lineJoin() const;
+
+    void fillEvenOdd(bool evenOddFlag);
+    bool fillEvenOdd() const;
+
+	void textAlignment(TextAlignment alignment);
+	void textSize(double sizeX, double sizeY);
+	inline void textSize(double size) { textSize(size, size); }
+
+    // Transformations
+    //-----------------------
+    Transformations transformations() const;
+    void transformations(const Transformations& tr);
+    void resetTransformations();
+    void affine(const Affine& tr);
+    void affine(const Transformations& tr);
+    void rotate(double angle);
+    void scale(double sx, double sy);
+    void skew(double sx, double sy);
+    void translate(double x, double y);
+    void parallelogram(double x1, double y1, double x2, double y2, const double* para);
+    void viewport(double worldX1,  double worldY1,  double worldX2,  double worldY2,
+                  double screenX1, double screenY1, double screenX2, double screenY2,
+                  ViewportOption opt=XMidYMid);
+
+    // Basic Shapes
+    //-----------------------
+    void line(double x1, double y1, double x2, double y2);
+    void triangle(double x1, double y1, double x2, double y2, double x3, double y3);
+    void rectangle(double x1, double y1, double x2, double y2);
+    void roundedRect(double x1, double y1, double x2, double y2, double r);
+    void roundedRect(double x1, double y1, double x2, double y2, double rx, double ry);
+    void roundedRect(double x1, double y1, double x2, double y2,
+                     double rxBottom, double ryBottom,
+                     double rxTop,    double ryTop);
+    void ellipse(double cx, double cy, double rx, double ry);
+    void arc(double cx, double cy, double rx, double ry, double start, double sweep);
+    void star(double cx, double cy, double r1, double r2, double startAngle, int numRays);
+    void curve(double x1, double y1, double x2, double y2, double x3, double y3);
+    void curve(double x1, double y1, double x2, double y2, double x3, double y3, double x4, double y4);
+    void polygon(double* xy, int numPoints);
+    void polyline(double* xy, int numPoints);
+
+    // Path commands
+    //-----------------------
+    void resetPath();
+
+    void moveTo(double x, double y);
+    void moveRel(double dx, double dy);
+
+    void lineTo(double x, double y);
+    void lineRel(double dx, double dy);
+
+    void horLineTo(double x);
+    void horLineRel(double dx);
+
+    void verLineTo(double y);
+    void verLineRel(double dy);
+
+    void arcTo(double rx, double ry,
+               double angle,
+               bool largeArcFlag,
+               bool sweepFlag,
+               double x, double y);
+
+    void arcRel(double rx, double ry,
+                double angle,
+                bool largeArcFlag,
+                bool sweepFlag,
+                double dx, double dy);
+
+    void quadricCurveTo(double xCtrl, double yCtrl,
+                         double xTo,   double yTo);
+    void quadricCurveRel(double dxCtrl, double dyCtrl,
+                         double dxTo,   double dyTo);
+    void quadricCurveTo(double xTo, double yTo);
+    void quadricCurveRel(double dxTo, double dyTo);
+
+    void cubicCurveTo(double xCtrl1, double yCtrl1,
+                      double xCtrl2, double yCtrl2,
+                      double xTo,    double yTo);
+
+    void cubicCurveRel(double dxCtrl1, double dyCtrl1,
+                       double dxCtrl2, double dyCtrl2,
+                       double dxTo,    double dyTo);
+
+    void cubicCurveTo(double xCtrl2, double yCtrl2,
+                      double xTo,    double yTo);
+
+    void cubicCurveRel(double xCtrl2, double yCtrl2,
+                       double xTo,    double yTo);
+
+    void addEllipse(double cx, double cy, double rx, double ry, Direction dir);
+	void text(double x, double y, const std::string& text);
+    void closePolygon();
+
+    void drawPath(DrawPathFlag flag = FillAndStroke);
+    void drawPathNoTransform(DrawPathFlag flag = FillAndStroke);
+
+
+    // Image Transformations
+    //-----------------------
+    void imageFilter(ImageFilter f);
+    ImageFilter imageFilter() const;
+
+    void imageResample(ImageResample f);
+    ImageResample imageResample() const;
+
+    void transformImage(const Image& img,
+                           int imgX1,    int imgY1,    int imgX2,    int imgY2,
+                        double dstX1, double dstY1, double dstX2, double dstY2);
+
+    void transformImage(const Image& img,
+                        double dstX1, double dstY1, double dstX2, double dstY2);
+
+    void transformImage(const Image& img,
+                        int imgX1, int imgY1, int imgX2, int imgY2,
+                        const double* parallelogram);
+
+    void transformImage(const Image& img, const double* parallelogram);
+
+
+    void transformImagePath(const Image& img,
+                               int imgX1,    int imgY1,    int imgX2,    int imgY2,
+                            double dstX1, double dstY1, double dstX2, double dstY2);
+
+    void transformImagePath(const Image& img,
+                            double dstX1, double dstY1, double dstX2, double dstY2);
+
+    void transformImagePath(const Image& img,
+                            int imgX1, int imgY1, int imgX2, int imgY2,
+                            const double* parallelogram);
+
+    void transformImagePath(const Image& img, const double* parallelogram);
+
+
+    // Image Blending (no transformations available)
+    void blendImage(Image& img,
+                    int imgX1, int imgY1, int imgX2, int imgY2,
+                    double dstX, double dstY, unsigned alpha=255);
+    void blendImage(Image& img, double dstX, double dstY, unsigned alpha=255);
+
+
+    // Copy image directly, together with alpha-channel
+    void copyImage(Image& img,
+                   int imgX1, int imgY1, int imgX2, int imgY2,
+                   double dstX, double dstY);
+    void copyImage(Image& img, double dstX, double dstY);
+
+
+    // Auxiliary
+    //-----------------------
+    static double pi() { return agg::pi; }
+    static double deg2Rad(double v) { return v * agg::pi / 180.0; }
+    static double rad2Deg(double v) { return v * 180.0 / agg::pi; }
+
+private:
+    void render(bool fillColor);
+#ifdef AGG_USE_FONTS
+    void render(FontRasterizer& ras, FontScanline& sl);
+#endif // AGG_USE_FONTS
+
+    void addLine(double x1, double y1, double x2, double y2);
+    void updateRasterizerGamma();
+    void renderImage(const Image& img, int x1, int y1, int x2, int y2, const double* parl);
+
+    agg::rendering_buffer           m_rbuf;
+    PixFormat                       m_pixFormat;
+    PixFormatComp                   m_pixFormatComp;
+    PixFormatPre                    m_pixFormatPre;
+    PixFormatCompPre                m_pixFormatCompPre;
+    RendererBase                    m_renBase;
+    RendererBaseComp                m_renBaseComp;
+    RendererBasePre                 m_renBasePre;
+    RendererBaseCompPre             m_renBaseCompPre;
+    RendererSolid                   m_renSolid;
+    RendererSolidComp               m_renSolidComp;
+
+    SpanAllocator                   m_allocator;
+    RectD                           m_clipBox;
+
+    BlendMode                       m_blendMode;
+    BlendMode                       m_imageBlendMode;
+    Color                           m_imageBlendColor;
+
+    agg::scanline_u8                m_scanline;
+    agg::rasterizer_scanline_aa<>   m_rasterizer;
+
+    double                          m_masterAlpha;
+    double                          m_antiAliasGamma;
+
+    Color                           m_fillColor;
+    Color                           m_lineColor;
+    GradientArray                   m_fillGradient;
+    GradientArray                   m_lineGradient;
+
+    LineCap                         m_lineCap;
+    LineJoin                        m_lineJoin;
+
+    Gradient                        m_fillGradientFlag;
+    Gradient                        m_lineGradientFlag;
+    agg::trans_affine               m_fillGradientMatrix;
+    agg::trans_affine               m_lineGradientMatrix;
+    double                          m_fillGradientD1;
+    double                          m_lineGradientD1;
+    double                          m_fillGradientD2;
+    double                          m_lineGradientD2;
+
+    TextAlignment                   m_textAlignment;
+    double                          m_textSizeX;
+    double                          m_textSizeY;
+
+    ImageFilter                     m_imageFilter;
+    ImageResample                   m_imageResample;
+    agg::image_filter_lut           m_imageFilterLut;
+
+    agg::span_interpolator_linear<> m_fillGradientInterpolator;
+    agg::span_interpolator_linear<> m_lineGradientInterpolator;
+
+    agg::gradient_x                 m_linearGradientFunction;
+    agg::gradient_circle            m_radialGradientFunction;
+
+    double                          m_lineWidth;
+    bool                            m_evenOddFlag;
+
+    agg::path_storage               m_path;
+    agg::trans_affine               m_transform;
+
+    ConvCurve                       m_convCurve;
+    ConvStroke                      m_convStroke;
+
+    PathTransform                   m_pathTransform;
+    StrokeTransform                 m_strokeTransform;
+
+#ifdef AGG_USE_FONTS
+#ifndef AGG2D_USE_FREETYPE
+    HDC                             m_fontDC;
+#endif
+    FontEngine                      m_fontEngine;
+    FontCacheManager                m_fontCacheManager;
+#endif
+};
+
+
+inline bool operator == (const Agg2D::Color& c1, const Agg2D::Color& c2)
+{
+   return c1.r == c2.r && c1.g == c2.g && c1.b == c2.b && c1.a == c2.a;
+}
+
+inline bool operator != (const Agg2D::Color& c1, const Agg2D::Color& c2)
+{
+   return !(c1 == c2);
+}
+
+
+#endif
+
+
--- a/dep/agg/include/agg_alpha_mask_u8.h
+++ b/dep/agg/include/agg_alpha_mask_u8.h
@@ -0,0 +1,499 @@
+//----------------------------------------------------------------------------
+// Anti-Grain Geometry - Version 2.4
+// Copyright (C) 2002-2005 Maxim Shemanarev (http://www.antigrain.com)
+//
+// Permission to copy, use, modify, sell and distribute this software 
+// is granted provided this copyright notice appears in all copies. 
+// This software is provided "as is" without express or implied
+// warranty, and with no claim as to its suitability for any purpose.
+//
+//----------------------------------------------------------------------------
+// Contact: mcseem@antigrain.com
+//          mcseemagg@yahoo.com
+//          http://www.antigrain.com
+//----------------------------------------------------------------------------
+//
+// scanline_u8 class
+//
+//----------------------------------------------------------------------------
+#ifndef AGG_ALPHA_MASK_U8_INCLUDED
+#define AGG_ALPHA_MASK_U8_INCLUDED
+
+#include <cstring>
+#include "agg_basics.h"
+#include "agg_rendering_buffer.h"
+
+namespace agg
+{
+    //===================================================one_component_mask_u8
+    struct one_component_mask_u8
+    {
+        static unsigned calculate(const int8u* p) { return *p; }
+    };
+    
+
+    //=====================================================rgb_to_gray_mask_u8
+    template<unsigned R, unsigned G, unsigned B>
+    struct rgb_to_gray_mask_u8
+    {
+        static unsigned calculate(const int8u* p) 
+        { 
+            return (p[R]*77 + p[G]*150 + p[B]*29) >> 8; 
+        }
+    };
+
+    //==========================================================alpha_mask_u8
+    template<unsigned Step=1, unsigned Offset=0, class MaskF=one_component_mask_u8>
+    class alpha_mask_u8
+    {
+    public:
+        typedef int8u cover_type;
+        typedef alpha_mask_u8<Step, Offset, MaskF> self_type;
+        enum cover_scale_e
+        { 
+            cover_shift = 8,
+            cover_none  = 0,
+            cover_full  = 255
+        };
+
+        alpha_mask_u8() : m_rbuf(0) {}
+        explicit alpha_mask_u8(rendering_buffer& rbuf) : m_rbuf(&rbuf) {}
+
+        void attach(rendering_buffer& rbuf) { m_rbuf = &rbuf; }
+
+        MaskF& mask_function() { return m_mask_function; }
+        const MaskF& mask_function() const { return m_mask_function; }
+
+        
+        //--------------------------------------------------------------------
+        cover_type pixel(int x, int y) const
+        {
+            if(x >= 0 && y >= 0 && 
+               x < (int)m_rbuf->width() && 
+               y < (int)m_rbuf->height())
+            {
+                return (cover_type)m_mask_function.calculate(
+                                        m_rbuf->row_ptr(y) + x * Step + Offset);
+            }
+            return 0;
+        }
+
+        //--------------------------------------------------------------------
+        cover_type combine_pixel(int x, int y, cover_type val) const
+        {
+            if(x >= 0 && y >= 0 && 
+               x < (int)m_rbuf->width() && 
+               y < (int)m_rbuf->height())
+            {
+                return (cover_type)((cover_full + val * 
+                                     m_mask_function.calculate(
+                                        m_rbuf->row_ptr(y) + x * Step + Offset)) >> 
+                                     cover_shift);
+            }
+            return 0;
+        }
+
+
+        //--------------------------------------------------------------------
+        void fill_hspan(int x, int y, cover_type* dst, int num_pix) const
+        {
+            int xmax = m_rbuf->width() - 1;
+            int ymax = m_rbuf->height() - 1;
+
+            int count = num_pix;
+            cover_type* covers = dst;
+
+            if(y < 0 || y > ymax)
+            {
+                std::memset(dst, 0, num_pix * sizeof(cover_type));
+                return;
+            }
+
+            if(x < 0)
+            {
+                count += x;
+                if(count <= 0) 
+                {
+                    std::memset(dst, 0, num_pix * sizeof(cover_type));
+                    return;
+                }
+                std::memset(covers, 0, -x * sizeof(cover_type));
+                covers -= x;
+                x = 0;
+            }
+
+            if(x + count > xmax)
+            {
+                int rest = x + count - xmax - 1;
+                count -= rest;
+                if(count <= 0) 
+                {
+                    std::memset(dst, 0, num_pix * sizeof(cover_type));
+                    return;
+                }
+                std::memset(covers + count, 0, rest * sizeof(cover_type));
+            }
+
+            const int8u* mask = m_rbuf->row_ptr(y) + x * Step + Offset;
+            do
+            {
+                *covers++ = (cover_type)m_mask_function.calculate(mask);
+                mask += Step;
+            }
+            while(--count);
+        }
+
+
+        //--------------------------------------------------------------------
+        void combine_hspan(int x, int y, cover_type* dst, int num_pix) const
+        {
+            int xmax = m_rbuf->width() - 1;
+            int ymax = m_rbuf->height() - 1;
+
+            int count = num_pix;
+            cover_type* covers = dst;
+
+            if(y < 0 || y > ymax)
+            {
+                std::memset(dst, 0, num_pix * sizeof(cover_type));
+                return;
+            }
+
+            if(x < 0)
+            {
+                count += x;
+                if(count <= 0) 
+                {
+                    std::memset(dst, 0, num_pix * sizeof(cover_type));
+                    return;
+                }
+                std::memset(covers, 0, -x * sizeof(cover_type));
+                covers -= x;
+                x = 0;
+            }
+
+            if(x + count > xmax)
+            {
+                int rest = x + count - xmax - 1;
+                count -= rest;
+                if(count <= 0) 
+                {
+                    std::memset(dst, 0, num_pix * sizeof(cover_type));
+                    return;
+                }
+                std::memset(covers + count, 0, rest * sizeof(cover_type));
+            }
+
+            const int8u* mask = m_rbuf->row_ptr(y) + x * Step + Offset;
+            do
+            {
+                *covers = (cover_type)((cover_full + (*covers) * 
+                                       m_mask_function.calculate(mask)) >> 
+                                       cover_shift);
+                ++covers;
+                mask += Step;
+            }
+            while(--count);
+        }
+
+        //--------------------------------------------------------------------
+        void fill_vspan(int x, int y, cover_type* dst, int num_pix) const
+        {
+            int xmax = m_rbuf->width() - 1;
+            int ymax = m_rbuf->height() - 1;
+
+            int count = num_pix;
+            cover_type* covers = dst;
+
+            if(x < 0 || x > xmax)
+            {
+                std::memset(dst, 0, num_pix * sizeof(cover_type));
+                return;
+            }
+
+            if(y < 0)
+            {
+                count += y;
+                if(count <= 0) 
+                {
+                    std::memset(dst, 0, num_pix * sizeof(cover_type));
+                    return;
+                }
+                std::memset(covers, 0, -y * sizeof(cover_type));
+                covers -= y;
+                y = 0;
+            }
+
+            if(y + count > ymax)
+            {
+                int rest = y + count - ymax - 1;
+                count -= rest;
+                if(count <= 0) 
+                {
+                    std::memset(dst, 0, num_pix * sizeof(cover_type));
+                    return;
+                }
+                std::memset(covers + count, 0, rest * sizeof(cover_type));
+            }
+
+            const int8u* mask = m_rbuf->row_ptr(y) + x * Step + Offset;
+            do
+            {
+                *covers++ = (cover_type)m_mask_function.calculate(mask);
+                mask += m_rbuf->stride();
+            }
+            while(--count);
+        }
+
+        //--------------------------------------------------------------------
+        void combine_vspan(int x, int y, cover_type* dst, int num_pix) const
+        {
+            int xmax = m_rbuf->width() - 1;
+            int ymax = m_rbuf->height() - 1;
+
+            int count = num_pix;
+            cover_type* covers = dst;
+
+            if(x < 0 || x > xmax)
+            {
+                std::memset(dst, 0, num_pix * sizeof(cover_type));
+                return;
+            }
+
+            if(y < 0)
+            {
+                count += y;
+                if(count <= 0) 
+                {
+                    std::memset(dst, 0, num_pix * sizeof(cover_type));
+                    return;
+                }
+                std::memset(covers, 0, -y * sizeof(cover_type));
+                covers -= y;
+                y = 0;
+            }
+
+            if(y + count > ymax)
+            {
+                int rest = y + count - ymax - 1;
+                count -= rest;
+                if(count <= 0) 
+                {
+                    std::memset(dst, 0, num_pix * sizeof(cover_type));
+                    return;
+                }
+                std::memset(covers + count, 0, rest * sizeof(cover_type));
+            }
+
+            const int8u* mask = m_rbuf->row_ptr(y) + x * Step + Offset;
+            do
+            {
+                *covers = (cover_type)((cover_full + (*covers) * 
+                                       m_mask_function.calculate(mask)) >> 
+                                       cover_shift);
+                ++covers;
+                mask += m_rbuf->stride();
+            }
+            while(--count);
+        }
+
+
+    private:
+        alpha_mask_u8(const self_type&);
+        const self_type& operator = (const self_type&);
+
+        rendering_buffer* m_rbuf;
+        MaskF             m_mask_function;
+    };
+    
+
+    typedef alpha_mask_u8<1, 0> alpha_mask_gray8;   //----alpha_mask_gray8
+
+    typedef alpha_mask_u8<3, 0> alpha_mask_rgb24r;  //----alpha_mask_rgb24r
+    typedef alpha_mask_u8<3, 1> alpha_mask_rgb24g;  //----alpha_mask_rgb24g
+    typedef alpha_mask_u8<3, 2> alpha_mask_rgb24b;  //----alpha_mask_rgb24b
+
+    typedef alpha_mask_u8<3, 2> alpha_mask_bgr24r;  //----alpha_mask_bgr24r
+    typedef alpha_mask_u8<3, 1> alpha_mask_bgr24g;  //----alpha_mask_bgr24g
+    typedef alpha_mask_u8<3, 0> alpha_mask_bgr24b;  //----alpha_mask_bgr24b
+
+    typedef alpha_mask_u8<4, 0> alpha_mask_rgba32r; //----alpha_mask_rgba32r
+    typedef alpha_mask_u8<4, 1> alpha_mask_rgba32g; //----alpha_mask_rgba32g
+    typedef alpha_mask_u8<4, 2> alpha_mask_rgba32b; //----alpha_mask_rgba32b
+    typedef alpha_mask_u8<4, 3> alpha_mask_rgba32a; //----alpha_mask_rgba32a
+
+    typedef alpha_mask_u8<4, 1> alpha_mask_argb32r; //----alpha_mask_argb32r
+    typedef alpha_mask_u8<4, 2> alpha_mask_argb32g; //----alpha_mask_argb32g
+    typedef alpha_mask_u8<4, 3> alpha_mask_argb32b; //----alpha_mask_argb32b
+    typedef alpha_mask_u8<4, 0> alpha_mask_argb32a; //----alpha_mask_argb32a
+
+    typedef alpha_mask_u8<4, 2> alpha_mask_bgra32r; //----alpha_mask_bgra32r
+    typedef alpha_mask_u8<4, 1> alpha_mask_bgra32g; //----alpha_mask_bgra32g
+    typedef alpha_mask_u8<4, 0> alpha_mask_bgra32b; //----alpha_mask_bgra32b
+    typedef alpha_mask_u8<4, 3> alpha_mask_bgra32a; //----alpha_mask_bgra32a
+
+    typedef alpha_mask_u8<4, 3> alpha_mask_abgr32r; //----alpha_mask_abgr32r
+    typedef alpha_mask_u8<4, 2> alpha_mask_abgr32g; //----alpha_mask_abgr32g
+    typedef alpha_mask_u8<4, 1> alpha_mask_abgr32b; //----alpha_mask_abgr32b
+    typedef alpha_mask_u8<4, 0> alpha_mask_abgr32a; //----alpha_mask_abgr32a
+
+    typedef alpha_mask_u8<3, 0, rgb_to_gray_mask_u8<0, 1, 2> > alpha_mask_rgb24gray;  //----alpha_mask_rgb24gray
+    typedef alpha_mask_u8<3, 0, rgb_to_gray_mask_u8<2, 1, 0> > alpha_mask_bgr24gray;  //----alpha_mask_bgr24gray
+    typedef alpha_mask_u8<4, 0, rgb_to_gray_mask_u8<0, 1, 2> > alpha_mask_rgba32gray; //----alpha_mask_rgba32gray
+    typedef alpha_mask_u8<4, 1, rgb_to_gray_mask_u8<0, 1, 2> > alpha_mask_argb32gray; //----alpha_mask_argb32gray
+    typedef alpha_mask_u8<4, 0, rgb_to_gray_mask_u8<2, 1, 0> > alpha_mask_bgra32gray; //----alpha_mask_bgra32gray
+    typedef alpha_mask_u8<4, 1, rgb_to_gray_mask_u8<2, 1, 0> > alpha_mask_abgr32gray; //----alpha_mask_abgr32gray
+
+
+
+    //==========================================================amask_no_clip_u8
+    template<unsigned Step=1, unsigned Offset=0, class MaskF=one_component_mask_u8>
+    class amask_no_clip_u8
+    {
+    public:
+        typedef int8u cover_type;
+        typedef amask_no_clip_u8<Step, Offset, MaskF> self_type;
+        enum cover_scale_e
+        { 
+            cover_shift = 8,
+            cover_none  = 0,
+            cover_full  = 255
+        };
+
+        amask_no_clip_u8() : m_rbuf(0) {}
+        explicit amask_no_clip_u8(rendering_buffer& rbuf) : m_rbuf(&rbuf) {}
+
+        void attach(rendering_buffer& rbuf) { m_rbuf = &rbuf; }
+
+        MaskF& mask_function() { return m_mask_function; }
+        const MaskF& mask_function() const { return m_mask_function; }
+
+
+        //--------------------------------------------------------------------
+        cover_type pixel(int x, int y) const
+        {
+            return (cover_type)m_mask_function.calculate(
+                                   m_rbuf->row_ptr(y) + x * Step + Offset);
+        }
+
+        
+        //--------------------------------------------------------------------
+        cover_type combine_pixel(int x, int y, cover_type val) const
+        {
+            return (cover_type)((cover_full + val * 
+                                 m_mask_function.calculate(
+                                    m_rbuf->row_ptr(y) + x * Step + Offset)) >> 
+                                 cover_shift);
+        }
+
+
+        //--------------------------------------------------------------------
+        void fill_hspan(int x, int y, cover_type* dst, int num_pix) const
+        {
+            const int8u* mask = m_rbuf->row_ptr(y) + x * Step + Offset;
+            do
+            {
+                *dst++ = (cover_type)m_mask_function.calculate(mask);
+                mask += Step;
+            }
+            while(--num_pix);
+        }
+
+
+
+        //--------------------------------------------------------------------
+        void combine_hspan(int x, int y, cover_type* dst, int num_pix) const
+        {
+            const int8u* mask = m_rbuf->row_ptr(y) + x * Step + Offset;
+            do
+            {
+                *dst = (cover_type)((cover_full + (*dst) * 
+                                    m_mask_function.calculate(mask)) >> 
+                                    cover_shift);
+                ++dst;
+                mask += Step;
+            }
+            while(--num_pix);
+        }
+
+
+        //--------------------------------------------------------------------
+        void fill_vspan(int x, int y, cover_type* dst, int num_pix) const
+        {
+            const int8u* mask = m_rbuf->row_ptr(y) + x * Step + Offset;
+            do
+            {
+                *dst++ = (cover_type)m_mask_function.calculate(mask);
+                mask += m_rbuf->stride();
+            }
+            while(--num_pix);
+        }
+
+
+        //--------------------------------------------------------------------
+        void combine_vspan(int x, int y, cover_type* dst, int num_pix) const
+        {
+            const int8u* mask = m_rbuf->row_ptr(y) + x * Step + Offset;
+            do
+            {
+                *dst = (cover_type)((cover_full + (*dst) * 
+                                    m_mask_function.calculate(mask)) >> 
+                                    cover_shift);
+                ++dst;
+                mask += m_rbuf->stride();
+            }
+            while(--num_pix);
+        }
+
+    private:
+        amask_no_clip_u8(const self_type&);
+        const self_type& operator = (const self_type&);
+
+        rendering_buffer* m_rbuf;
+        MaskF             m_mask_function;
+    };
+    
+
+    typedef amask_no_clip_u8<1, 0> amask_no_clip_gray8;   //----amask_no_clip_gray8
+
+    typedef amask_no_clip_u8<3, 0> amask_no_clip_rgb24r;  //----amask_no_clip_rgb24r
+    typedef amask_no_clip_u8<3, 1> amask_no_clip_rgb24g;  //----amask_no_clip_rgb24g
+    typedef amask_no_clip_u8<3, 2> amask_no_clip_rgb24b;  //----amask_no_clip_rgb24b
+
+    typedef amask_no_clip_u8<3, 2> amask_no_clip_bgr24r;  //----amask_no_clip_bgr24r
+    typedef amask_no_clip_u8<3, 1> amask_no_clip_bgr24g;  //----amask_no_clip_bgr24g
+    typedef amask_no_clip_u8<3, 0> amask_no_clip_bgr24b;  //----amask_no_clip_bgr24b
+
+    typedef amask_no_clip_u8<4, 0> amask_no_clip_rgba32r; //----amask_no_clip_rgba32r
+    typedef amask_no_clip_u8<4, 1> amask_no_clip_rgba32g; //----amask_no_clip_rgba32g
+    typedef amask_no_clip_u8<4, 2> amask_no_clip_rgba32b; //----amask_no_clip_rgba32b
+    typedef amask_no_clip_u8<4, 3> amask_no_clip_rgba32a; //----amask_no_clip_rgba32a
+
+    typedef amask_no_clip_u8<4, 1> amask_no_clip_argb32r; //----amask_no_clip_argb32r
+    typedef amask_no_clip_u8<4, 2> amask_no_clip_argb32g; //----amask_no_clip_argb32g
+    typedef amask_no_clip_u8<4, 3> amask_no_clip_argb32b; //----amask_no_clip_argb32b
+    typedef amask_no_clip_u8<4, 0> amask_no_clip_argb32a; //----amask_no_clip_argb32a
+
+    typedef amask_no_clip_u8<4, 2> amask_no_clip_bgra32r; //----amask_no_clip_bgra32r
+    typedef amask_no_clip_u8<4, 1> amask_no_clip_bgra32g; //----amask_no_clip_bgra32g
+    typedef amask_no_clip_u8<4, 0> amask_no_clip_bgra32b; //----amask_no_clip_bgra32b
+    typedef amask_no_clip_u8<4, 3> amask_no_clip_bgra32a; //----amask_no_clip_bgra32a
+
+    typedef amask_no_clip_u8<4, 3> amask_no_clip_abgr32r; //----amask_no_clip_abgr32r
+    typedef amask_no_clip_u8<4, 2> amask_no_clip_abgr32g; //----amask_no_clip_abgr32g
+    typedef amask_no_clip_u8<4, 1> amask_no_clip_abgr32b; //----amask_no_clip_abgr32b
+    typedef amask_no_clip_u8<4, 0> amask_no_clip_abgr32a; //----amask_no_clip_abgr32a
+
+    typedef amask_no_clip_u8<3, 0, rgb_to_gray_mask_u8<0, 1, 2> > amask_no_clip_rgb24gray;  //----amask_no_clip_rgb24gray
+    typedef amask_no_clip_u8<3, 0, rgb_to_gray_mask_u8<2, 1, 0> > amask_no_clip_bgr24gray;  //----amask_no_clip_bgr24gray
+    typedef amask_no_clip_u8<4, 0, rgb_to_gray_mask_u8<0, 1, 2> > amask_no_clip_rgba32gray; //----amask_no_clip_rgba32gray
+    typedef amask_no_clip_u8<4, 1, rgb_to_gray_mask_u8<0, 1, 2> > amask_no_clip_argb32gray; //----amask_no_clip_argb32gray
+    typedef amask_no_clip_u8<4, 0, rgb_to_gray_mask_u8<2, 1, 0> > amask_no_clip_bgra32gray; //----amask_no_clip_bgra32gray
+    typedef amask_no_clip_u8<4, 1, rgb_to_gray_mask_u8<2, 1, 0> > amask_no_clip_abgr32gray; //----amask_no_clip_abgr32gray
+
+
+}
+
+
+
+#endif
--- a/dep/agg/include/agg_arc.h
+++ b/dep/agg/include/agg_arc.h
@@ -0,0 +1,73 @@
+//----------------------------------------------------------------------------
+// Anti-Grain Geometry - Version 2.4
+// Copyright (C) 2002-2005 Maxim Shemanarev (http://www.antigrain.com)
+//
+// Permission to copy, use, modify, sell and distribute this software 
+// is granted provided this copyright notice appears in all copies. 
+// This software is provided "as is" without express or implied
+// warranty, and with no claim as to its suitability for any purpose.
+//
+//----------------------------------------------------------------------------
+// Contact: mcseem@antigrain.com
+//          mcseemagg@yahoo.com
+//          http://www.antigrain.com
+//----------------------------------------------------------------------------
+//
+// Arc vertex generator
+//
+//----------------------------------------------------------------------------
+
+#ifndef AGG_ARC_INCLUDED
+#define AGG_ARC_INCLUDED
+
+#include "agg_basics.h"
+
+namespace agg
+{
+
+    //=====================================================================arc
+    //
+    // See Implementation agg_arc.cpp 
+    //
+    class arc
+    {
+    public:
+        arc() : m_scale(1.0), m_initialized(false) {}
+        arc(double x,  double y, 
+            double rx, double ry, 
+            double a1, double a2, 
+            bool ccw=true);
+
+        void init(double x,  double y, 
+                  double rx, double ry, 
+                  double a1, double a2, 
+                  bool ccw=true);
+
+        void approximation_scale(double s);
+        double approximation_scale() const { return m_scale;  }
+
+        void rewind(unsigned);
+        unsigned vertex(double* x, double* y);
+
+    private:
+        void normalize(double a1, double a2, bool ccw);
+
+        double   m_x;
+        double   m_y;
+        double   m_rx;
+        double   m_ry;
+        double   m_angle;
+        double   m_start;
+        double   m_end;
+        double   m_scale;
+        double   m_da;
+        bool     m_ccw;
+        bool     m_initialized;
+        unsigned m_path_cmd;
+    };
+
+
+}
+
+
+#endif
--- a/dep/agg/include/agg_array.h
+++ b/dep/agg/include/agg_array.h
--- a/dep/agg/include/agg_arrowhead.h
+++ b/dep/agg/include/agg_arrowhead.h
@@ -0,0 +1,82 @@
+//----------------------------------------------------------------------------
+// Anti-Grain Geometry - Version 2.4
+// Copyright (C) 2002-2005 Maxim Shemanarev (http://www.antigrain.com)
+//
+// Permission to copy, use, modify, sell and distribute this software 
+// is granted provided this copyright notice appears in all copies. 
+// This software is provided "as is" without express or implied
+// warranty, and with no claim as to its suitability for any purpose.
+//
+//----------------------------------------------------------------------------
+// Contact: mcseem@antigrain.com
+//          mcseemagg@yahoo.com
+//          http://www.antigrain.com
+//----------------------------------------------------------------------------
+//
+// Simple arrowhead/arrowtail generator 
+//
+//----------------------------------------------------------------------------
+#ifndef AGG_ARROWHEAD_INCLUDED
+#define AGG_ARROWHEAD_INCLUDED
+
+#include "agg_basics.h"
+
+namespace agg
+{
+
+    //===============================================================arrowhead
+    //
+    // See implementation agg_arrowhead.cpp 
+    //
+    class arrowhead
+    {
+    public:
+        arrowhead();
+
+        void head(double d1, double d2, double d3, double d4)
+        {
+            m_head_d1 = d1;
+            m_head_d2 = d2;
+            m_head_d3 = d3;
+            m_head_d4 = d4;
+            m_head_flag = true;
+        }
+
+        void head()    { m_head_flag = true; }
+        void no_head() { m_head_flag = false; }
+
+        void tail(double d1, double d2, double d3, double d4)
+        {
+            m_tail_d1 = d1;
+            m_tail_d2 = d2;
+            m_tail_d3 = d3;
+            m_tail_d4 = d4;
+            m_tail_flag = true;
+        }
+
+        void tail()    { m_tail_flag = true;  }
+        void no_tail() { m_tail_flag = false; }
+
+        void rewind(unsigned path_id);
+        unsigned vertex(double* x, double* y);
+
+    private:
+        double   m_head_d1;
+        double   m_head_d2;
+        double   m_head_d3;
+        double   m_head_d4;
+        double   m_tail_d1;
+        double   m_tail_d2;
+        double   m_tail_d3;
+        double   m_tail_d4;
+        bool     m_head_flag;
+        bool     m_tail_flag;
+        double   m_coord[16];
+        unsigned m_cmd[8];
+        unsigned m_curr_id;
+        unsigned m_curr_coord;
+    };
+
+}
+
+#endif
--- a/dep/agg/include/agg_basics.h
+++ b/dep/agg/include/agg_basics.h
@@ -0,0 +1,574 @@
+//----------------------------------------------------------------------------
+// Anti-Grain Geometry - Version 2.4
+// Copyright (C) 2002-2005 Maxim Shemanarev (http://www.antigrain.com)
+//
+// Permission to copy, use, modify, sell and distribute this software 
+// is granted provided this copyright notice appears in all copies. 
+// This software is provided "as is" without express or implied
+// warranty, and with no claim as to its suitability for any purpose.
+//
+//----------------------------------------------------------------------------
+// Contact: mcseem@antigrain.com
+//          mcseemagg@yahoo.com
+//          http://www.antigrain.com
+//----------------------------------------------------------------------------
+
+#ifndef AGG_BASICS_INCLUDED
+#define AGG_BASICS_INCLUDED
+
+#include <cmath>
+#include "agg_config.h"
+
+//---------------------------------------------------------AGG_CUSTOM_ALLOCATOR
+#ifdef AGG_CUSTOM_ALLOCATOR
+#include "agg_allocator.h"
+#else
+namespace agg
+{
+    // The policy of all AGG containers and memory allocation strategy 
+    // in general is that no allocated data requires explicit construction.
+    // It means that the allocator can be really simple; you can even
+    // replace new/delete to malloc/free. The constructors and destructors 
+    // won't be called in this case, however everything will remain working. 
+    // The second argument of deallocate() is the size of the allocated 
+    // block. You can use this information if you wish.
+    //------------------------------------------------------------pod_allocator
+    template<class T> struct pod_allocator
+    {
+        static T*   allocate(unsigned num)       { return new T [num]; }
+        static void deallocate(T* ptr, unsigned) { delete [] ptr;      }
+    };
+
+    // Single object allocator. It's also can be replaced with your custom
+    // allocator. The difference is that it can only allocate a single 
+    // object and the constructor and destructor must be called. 
+    // In AGG there is no need to allocate an array of objects with
+    // calling their constructors (only single ones). So that, if you
+    // replace these new/delete to malloc/free make sure that the in-place
+    // new is called and take care of calling the destructor too.
+    //------------------------------------------------------------obj_allocator
+    template<class T> struct obj_allocator
+    {
+        static T*   allocate()         { return new T; }
+        static void deallocate(T* ptr) { delete ptr;   }
+    };
+}
+#endif
+
+
+//-------------------------------------------------------- Default basic types
+//
+// If the compiler has different capacity of the basic types you can redefine
+// them via the compiler command line or by generating agg_config.h that is
+// empty by default.
+//
+#ifndef AGG_INT8
+#define AGG_INT8 signed char
+#endif
+
+#ifndef AGG_INT8U
+#define AGG_INT8U unsigned char
+#endif
+
+#ifndef AGG_INT16
+#define AGG_INT16 short
+#endif
+
+#ifndef AGG_INT16U
+#define AGG_INT16U unsigned short
+#endif
+
+#ifndef AGG_INT32
+#define AGG_INT32 int
+#endif
+
+#ifndef AGG_INT32U
+#define AGG_INT32U unsigned
+#endif
+
+#ifndef AGG_INT64
+#if defined(_MSC_VER) || defined(__BORLANDC__)
+#define AGG_INT64 signed __int64
+#else
+#define AGG_INT64 signed long long
+#endif
+#endif
+
+#ifndef AGG_INT64U
+#if defined(_MSC_VER) || defined(__BORLANDC__)
+#define AGG_INT64U unsigned __int64
+#else
+#define AGG_INT64U unsigned long long
+#endif
+#endif
+
+//------------------------------------------------ Some fixes for MS Visual C++
+#if defined(_MSC_VER)
+#pragma warning(disable:4786) // Identifier was truncated...
+#endif
+
+#if defined(_MSC_VER)
+#define AGG_INLINE __forceinline
+#else
+#define AGG_INLINE inline
+#endif
+
+namespace agg
+{
+    //-------------------------------------------------------------------------
+    typedef AGG_INT8   int8;         //----int8
+    typedef AGG_INT8U  int8u;        //----int8u
+    typedef AGG_INT16  int16;        //----int16
+    typedef AGG_INT16U int16u;       //----int16u
+    typedef AGG_INT32  int32;        //----int32
+    typedef AGG_INT32U int32u;       //----int32u
+    typedef AGG_INT64  int64;        //----int64
+    typedef AGG_INT64U int64u;       //----int64u
+
+#if defined(AGG_FISTP)
+#pragma warning(push)
+#pragma warning(disable : 4035) //Disable warning "no return value"
+    AGG_INLINE int iround(double v)              //-------iround
+    {
+        int t;
+        __asm fld   qword ptr [v]
+        __asm fistp dword ptr [t]
+        __asm mov eax, dword ptr [t]
+    }
+    AGG_INLINE unsigned uround(double v)         //-------uround
+    {
+        unsigned t;
+        __asm fld   qword ptr [v]
+        __asm fistp dword ptr [t]
+        __asm mov eax, dword ptr [t]
+    }
+#pragma warning(pop)
+    AGG_INLINE int ifloor(double v)
+    {
+        return int(floor(v));
+    }
+    AGG_INLINE unsigned ufloor(double v)         //-------ufloor
+    {
+        return unsigned(floor(v));
+    }
+    AGG_INLINE int iceil(double v)
+    {
+        return int(ceil(v));
+    }
+    AGG_INLINE unsigned uceil(double v)          //--------uceil
+    {
+        return unsigned(ceil(v));
+    }
+#elif defined(AGG_QIFIST)
+    AGG_INLINE int iround(double v)
+    {
+        return int(v);
+    }
+    AGG_INLINE int uround(double v)
+    {
+        return unsigned(v);
+    }
+    AGG_INLINE int ifloor(double v)
+    {
+        return int(std::floor(v));
+    }
+    AGG_INLINE unsigned ufloor(double v)
+    {
+        return unsigned(std::floor(v));
+    }
+    AGG_INLINE int iceil(double v)
+    {
+        return int(std::ceil(v));
+    }
+    AGG_INLINE unsigned uceil(double v)
+    {
+        return unsigned(std::ceil(v));
+    }
+#else
+    AGG_INLINE int iround(double v)
+    {
+        return int((v < 0.0) ? v - 0.5 : v + 0.5);
+    }
+    AGG_INLINE int uround(double v)
+    {
+        return unsigned(v + 0.5);
+    }
+    AGG_INLINE int ifloor(double v)
+    {
+        int i = int(v);
+        return i - (i > v);
+    }
+    AGG_INLINE unsigned ufloor(double v)
+    {
+        return unsigned(v);
+    }
+    AGG_INLINE int iceil(double v)
+    {
+        return int(std::ceil(v));
+    }
+    AGG_INLINE unsigned uceil(double v)
+    {
+        return unsigned(std::ceil(v));
+    }
+#endif
+
+    //---------------------------------------------------------------saturation
+    template<int Limit> struct saturation
+    {
+        AGG_INLINE static int iround(double v)
+        {
+            if(v < double(-Limit)) return -Limit;
+            if(v > double( Limit)) return  Limit;
+            return agg::iround(v);
+        }
+    };
+
+    //------------------------------------------------------------------mul_one
+    template<unsigned Shift> struct mul_one
+    {
+        AGG_INLINE static unsigned mul(unsigned a, unsigned b)
+        {
+            unsigned q = a * b + (1 << (Shift-1));
+            return (q + (q >> Shift)) >> Shift;
+        }
+    };
+
+    //-------------------------------------------------------------------------
+    typedef unsigned char cover_type;    //----cover_type
+    enum cover_scale_e
+    {
+        cover_shift = 8,                 //----cover_shift
+        cover_size  = 1 << cover_shift,  //----cover_size 
+        cover_mask  = cover_size - 1,    //----cover_mask 
+        cover_none  = 0,                 //----cover_none 
+        cover_full  = cover_mask         //----cover_full 
+    };
+
+    //----------------------------------------------------poly_subpixel_scale_e
+    // These constants determine the subpixel accuracy, to be more precise, 
+    // the number of bits of the fractional part of the coordinates. 
+    // The possible coordinate capacity in bits can be calculated by formula:
+    // sizeof(int) * 8 - poly_subpixel_shift, i.e, for 32-bit integers and
+    // 8-bits fractional part the capacity is 24 bits.
+    enum poly_subpixel_scale_e
+    {
+        poly_subpixel_shift = 8,                      //----poly_subpixel_shift
+        poly_subpixel_scale = 1<<poly_subpixel_shift, //----poly_subpixel_scale 
+        poly_subpixel_mask  = poly_subpixel_scale-1   //----poly_subpixel_mask 
+    };
+
+    //----------------------------------------------------------filling_rule_e
+    enum filling_rule_e
+    {
+        fill_non_zero,
+        fill_even_odd
+    };
+
+    //-----------------------------------------------------------------------pi
+    const double pi = 3.14159265358979323846;
+
+    //------------------------------------------------------------------deg2rad
+    inline double deg2rad(double deg)
+    {
+        return deg * pi / 180.0;
+    }
+
+    //------------------------------------------------------------------rad2deg
+    inline double rad2deg(double rad)
+    {
+        return rad * 180.0 / pi;
+    }
+ 
+    //----------------------------------------------------------------rect_base
+    template<class T> struct rect_base
+    {
+        typedef T            value_type;
+        typedef rect_base<T> self_type;
+        T x1, y1, x2, y2;
+
+        rect_base() {}
+        rect_base(T x1_, T y1_, T x2_, T y2_) :
+            x1(x1_), y1(y1_), x2(x2_), y2(y2_) {}
+
+        void init(T x1_, T y1_, T x2_, T y2_) 
+        {
+            x1 = x1_; y1 = y1_; x2 = x2_; y2 = y2_; 
+        }
+
+        const self_type& normalize()
+        {
+            T t;
+            if(x1 > x2) { t = x1; x1 = x2; x2 = t; }
+            if(y1 > y2) { t = y1; y1 = y2; y2 = t; }
+            return *this;
+        }
+
+        bool clip(const self_type& r)
+        {
+            if(x2 > r.x2) x2 = r.x2;
+            if(y2 > r.y2) y2 = r.y2;
+            if(x1 < r.x1) x1 = r.x1;
+            if(y1 < r.y1) y1 = r.y1;
+            return x1 <= x2 && y1 <= y2;
+        }
+
+        bool is_valid() const
+        {
+            return x1 <= x2 && y1 <= y2;
+        }
+
+        bool hit_test(T x, T y) const
+        {
+            return (x >= x1 && x <= x2 && y >= y1 && y <= y2);
+        }
+        
+        bool overlaps(const self_type& r) const
+        {
+            return !(r.x1 > x2 || r.x2 < x1
+                  || r.y1 > y2 || r.y2 < y1);
+        }
+    };
+
+    //-----------------------------------------------------intersect_rectangles
+    template<class Rect> 
+    inline Rect intersect_rectangles(const Rect& r1, const Rect& r2)
+    {
+        Rect r = r1;
+
+        // First process x2,y2 because the other order 
+        // results in Internal Compiler Error under 
+        // Microsoft Visual C++ .NET 2003 69462-335-0000007-18038 in 
+        // case of "Maximize Speed" optimization option.
+        //-----------------
+        if(r.x2 > r2.x2) r.x2 = r2.x2; 
+        if(r.y2 > r2.y2) r.y2 = r2.y2;
+        if(r.x1 < r2.x1) r.x1 = r2.x1;
+        if(r.y1 < r2.y1) r.y1 = r2.y1;
+        return r;
+    }
+
+
+    //---------------------------------------------------------unite_rectangles
+    template<class Rect> 
+    inline Rect unite_rectangles(const Rect& r1, const Rect& r2)
+    {
+        Rect r = r1;
+        if(r.x2 < r2.x2) r.x2 = r2.x2;
+        if(r.y2 < r2.y2) r.y2 = r2.y2;
+        if(r.x1 > r2.x1) r.x1 = r2.x1;
+        if(r.y1 > r2.y1) r.y1 = r2.y1;
+        return r;
+    }
+
+    typedef rect_base<int>    rect_i; //----rect_i
+    typedef rect_base<float>  rect_f; //----rect_f
+    typedef rect_base<double> rect_d; //----rect_d
+
+    //---------------------------------------------------------path_commands_e
+    enum path_commands_e
+    {
+        path_cmd_stop     = 0,        //----path_cmd_stop    
+        path_cmd_move_to  = 1,        //----path_cmd_move_to 
+        path_cmd_line_to  = 2,        //----path_cmd_line_to 
+        path_cmd_curve3   = 3,        //----path_cmd_curve3  
+        path_cmd_curve4   = 4,        //----path_cmd_curve4  
+        path_cmd_curveN   = 5,        //----path_cmd_curveN
+        path_cmd_catrom   = 6,        //----path_cmd_catrom
+        path_cmd_ubspline = 7,        //----path_cmd_ubspline
+        path_cmd_end_poly = 0x0F,     //----path_cmd_end_poly
+        path_cmd_mask     = 0x0F      //----path_cmd_mask    
+    };
+
+    //------------------------------------------------------------path_flags_e
+    enum path_flags_e
+    {
+        path_flags_none  = 0,         //----path_flags_none 
+        path_flags_ccw   = 0x10,      //----path_flags_ccw  
+        path_flags_cw    = 0x20,      //----path_flags_cw   
+        path_flags_close = 0x40,      //----path_flags_close
+        path_flags_mask  = 0xF0       //----path_flags_mask 
+    };
+
+    //---------------------------------------------------------------is_vertex
+    inline bool is_vertex(unsigned c)
+    {
+        return c >= path_cmd_move_to && c < path_cmd_end_poly;
+    }
+
+    //--------------------------------------------------------------is_drawing
+    inline bool is_drawing(unsigned c)
+    {
+        return c >= path_cmd_line_to && c < path_cmd_end_poly;
+    }
+
+    //-----------------------------------------------------------------is_stop
+    inline bool is_stop(unsigned c)
+    { 
+        return c == path_cmd_stop;
+    }
+
+    //--------------------------------------------------------------is_move_to
+    inline bool is_move_to(unsigned c)
+    {
+        return c == path_cmd_move_to;
+    }
+
+    //--------------------------------------------------------------is_line_to
+    inline bool is_line_to(unsigned c)
+    {
+        return c == path_cmd_line_to;
+    }
+
+    //----------------------------------------------------------------is_curve
+    inline bool is_curve(unsigned c)
+    {
+        return c == path_cmd_curve3 || c == path_cmd_curve4;
+    }
+
+    //---------------------------------------------------------------is_curve3
+    inline bool is_curve3(unsigned c)
+    {
+        return c == path_cmd_curve3;
+    }
+
+    //---------------------------------------------------------------is_curve4
+    inline bool is_curve4(unsigned c)
+    {
+        return c == path_cmd_curve4;
+    }
+
+    //-------------------------------------------------------------is_end_poly
+    inline bool is_end_poly(unsigned c)
+    {
+        return (c & path_cmd_mask) == path_cmd_end_poly;
+    }
+
+    //----------------------------------------------------------------is_close
+    inline bool is_close(unsigned c)
+    {
+        return (c & ~(path_flags_cw | path_flags_ccw)) ==
+               (path_cmd_end_poly | path_flags_close); 
+    }
+
+    //------------------------------------------------------------is_next_poly
+    inline bool is_next_poly(unsigned c)
+    {
+        return is_stop(c) || is_move_to(c) || is_end_poly(c);
+    }
+
+    //-------------------------------------------------------------------is_cw
+    inline bool is_cw(unsigned c)
+    {
+        return (c & path_flags_cw) != 0;
+    }
+
+    //------------------------------------------------------------------is_ccw
+    inline bool is_ccw(unsigned c)
+    {
+        return (c & path_flags_ccw) != 0;
+    }
+
+    //-------------------------------------------------------------is_oriented
+    inline bool is_oriented(unsigned c)
+    {
+        return (c & (path_flags_cw | path_flags_ccw)) != 0; 
+    }
+
+    //---------------------------------------------------------------is_closed
+    inline bool is_closed(unsigned c)
+    {
+        return (c & path_flags_close) != 0; 
+    }
+
+    //----------------------------------------------------------get_close_flag
+    inline unsigned get_close_flag(unsigned c)
+    {
+        return c & path_flags_close; 
+    }
+
+    //-------------------------------------------------------clear_orientation
+    inline unsigned clear_orientation(unsigned c)
+    {
+        return c & ~(path_flags_cw | path_flags_ccw);
+    }
+
+    //---------------------------------------------------------get_orientation
+    inline unsigned get_orientation(unsigned c)
+    {
+        return c & (path_flags_cw | path_flags_ccw);
+    }
+
+    //---------------------------------------------------------set_orientation
+    inline unsigned set_orientation(unsigned c, unsigned o)
+    {
+        return clear_orientation(c) | o;
+    }
+
+    //--------------------------------------------------------------point_base
+    template<class T> struct point_base
+    {
+        typedef T value_type;
+        T x,y;
+        point_base() {}
+        point_base(T x_, T y_) : x(x_), y(y_) {}
+    };
+    typedef point_base<int>    point_i; //-----point_i
+    typedef point_base<float>  point_f; //-----point_f
+    typedef point_base<double> point_d; //-----point_d
+
+    //-------------------------------------------------------------vertex_base
+    template<class T> struct vertex_base
+    {
+        typedef T value_type;
+        T x,y;
+        unsigned cmd;
+        vertex_base() {}
+        vertex_base(T x_, T y_, unsigned cmd_) : x(x_), y(y_), cmd(cmd_) {}
+    };
+    typedef vertex_base<int>    vertex_i; //-----vertex_i
+    typedef vertex_base<float>  vertex_f; //-----vertex_f
+    typedef vertex_base<double> vertex_d; //-----vertex_d
+
+    //----------------------------------------------------------------row_info
+    template<class T> struct row_info
+    {
+        int x1, x2;
+        T* ptr;
+        row_info() {}
+        row_info(int x1_, int x2_, T* ptr_) : x1(x1_), x2(x2_), ptr(ptr_) {}
+    };
+
+    //----------------------------------------------------------const_row_info
+    template<class T> struct const_row_info
+    {
+        int x1, x2;
+        const T* ptr;
+        const_row_info() {}
+        const_row_info(int x1_, int x2_, const T* ptr_) : 
+            x1(x1_), x2(x2_), ptr(ptr_) {}
+    };
+
+    //------------------------------------------------------------is_equal_eps
+    template<class T> inline bool is_equal_eps(T v1, T v2, T epsilon)
+    {
+	bool neg1 = v1 < 0.0;
+	bool neg2 = v2 < 0.0;
+
+	if (neg1 != neg2)
+	    return std::fabs(v1) < epsilon && std::fabs(v2) < epsilon;
+
+        int int1, int2;
+	std::frexp(v1, &int1);
+	std::frexp(v2, &int2);
+	int min12 = int1 < int2 ? int1 : int2;
+
+	v1 = std::ldexp(v1, -min12);
+	v2 = std::ldexp(v2, -min12);
+
+	return std::fabs(v1 - v2) < epsilon;
+    }
+}
+
+
+#endif
+
--- a/dep/agg/include/agg_bezier_arc.h
+++ b/dep/agg/include/agg_bezier_arc.h
@@ -0,0 +1,159 @@
+//----------------------------------------------------------------------------
+// Anti-Grain Geometry - Version 2.4
+// Copyright (C) 2002-2005 Maxim Shemanarev (http://www.antigrain.com)
+//
+// Permission to copy, use, modify, sell and distribute this software 
+// is granted provided this copyright notice appears in all copies. 
+// This software is provided "as is" without express or implied
+// warranty, and with no claim as to its suitability for any purpose.
+//
+//----------------------------------------------------------------------------
+// Contact: mcseem@antigrain.com
+//          mcseemagg@yahoo.com
+//          http://www.antigrain.com
+//----------------------------------------------------------------------------
+//
+// Arc generator. Produces at most 4 consecutive cubic bezier curves, i.e., 
+// 4, 7, 10, or 13 vertices.
+//
+//----------------------------------------------------------------------------
+
+#ifndef AGG_BEZIER_ARC_INCLUDED
+#define AGG_BEZIER_ARC_INCLUDED
+
+#include "agg_conv_transform.h"
+
+namespace agg
+{
+
+    //-----------------------------------------------------------------------
+    void arc_to_bezier(double cx, double cy, double rx, double ry, 
+                       double start_angle, double sweep_angle,
+                       double* curve);
+
+
+    //==============================================================bezier_arc
+    // 
+    // See implemantaion agg_bezier_arc.cpp
+    //
+    class bezier_arc
+    {
+    public:
+        //--------------------------------------------------------------------
+        bezier_arc() : m_vertex(26), m_num_vertices(0), m_cmd(path_cmd_line_to) {}
+        bezier_arc(double x,  double y, 
+                   double rx, double ry, 
+                   double start_angle, 
+                   double sweep_angle)
+        {
+            init(x, y, rx, ry, start_angle, sweep_angle);
+        }
+
+        //--------------------------------------------------------------------
+        void init(double x,  double y, 
+                  double rx, double ry, 
+                  double start_angle, 
+                  double sweep_angle);
+
+        //--------------------------------------------------------------------
+        void rewind(unsigned)
+        {
+            m_vertex = 0;
+        }
+
+        //--------------------------------------------------------------------
+        unsigned vertex(double* x, double* y)
+        {
+            if(m_vertex >= m_num_vertices) return path_cmd_stop;
+            *x = m_vertices[m_vertex];
+            *y = m_vertices[m_vertex + 1];
+            m_vertex += 2;
+            return (m_vertex == 2) ? unsigned(path_cmd_move_to) : m_cmd;
+        }
+
+        // Supplemantary functions. num_vertices() actually returns doubled 
+        // number of vertices. That is, for 1 vertex it returns 2.
+        //--------------------------------------------------------------------
+        unsigned  num_vertices() const { return m_num_vertices; }
+        const double* vertices() const { return m_vertices;     }
+        double*       vertices()       { return m_vertices;     }
+ 
+    private:
+        unsigned m_vertex;
+        unsigned m_num_vertices;
+        double   m_vertices[26];
+        unsigned m_cmd;
+    };
+
+
+
+    //==========================================================bezier_arc_svg
+    // Compute an SVG-style bezier arc. 
+    //
+    // Computes an elliptical arc from (x1, y1) to (x2, y2). The size and 
+    // orientation of the ellipse are defined by two radii (rx, ry) 
+    // and an x-axis-rotation, which indicates how the ellipse as a whole 
+    // is rotated relative to the current coordinate system. The center 
+    // (cx, cy) of the ellipse is calculated automatically to satisfy the 
+    // constraints imposed by the other parameters. 
+    // large-arc-flag and sweep-flag contribute to the automatic calculations 
+    // and help determine how the arc is drawn.
+    class bezier_arc_svg
+    {
+    public:
+        //--------------------------------------------------------------------
+        bezier_arc_svg() : m_arc(), m_radii_ok(false) {}
+
+        bezier_arc_svg(double x1, double y1, 
+                       double rx, double ry, 
+                       double angle,
+                       bool large_arc_flag,
+                       bool sweep_flag,
+                       double x2, double y2) : 
+            m_arc(), m_radii_ok(false)
+        {
+            init(x1, y1, rx, ry, angle, large_arc_flag, sweep_flag, x2, y2);
+        }
+
+        //--------------------------------------------------------------------
+        void init(double x1, double y1, 
+                  double rx, double ry, 
+                  double angle,
+                  bool large_arc_flag,
+                  bool sweep_flag,
+                  double x2, double y2);
+
+        //--------------------------------------------------------------------
+        bool radii_ok() const { return m_radii_ok; }
+
+        //--------------------------------------------------------------------
+        void rewind(unsigned)
+        {
+            m_arc.rewind(0);
+        }
+
+        //--------------------------------------------------------------------
+        unsigned vertex(double* x, double* y)
+        {
+            return m_arc.vertex(x, y);
+        }
+
+        // Supplemantary functions. num_vertices() actually returns doubled 
+        // number of vertices. That is, for 1 vertex it returns 2.
+        //--------------------------------------------------------------------
+        unsigned  num_vertices() const { return m_arc.num_vertices(); }
+        const double* vertices() const { return m_arc.vertices();     }
+        double*       vertices()       { return m_arc.vertices();     }
+
+    private:
+        bezier_arc m_arc;
+        bool       m_radii_ok;
+    };
+
+
+
+
+}
+
+
+#endif
--- a/dep/agg/include/agg_bitset_iterator.h
+++ b/dep/agg/include/agg_bitset_iterator.h
@@ -0,0 +1,54 @@
+//----------------------------------------------------------------------------
+// Anti-Grain Geometry - Version 2.4
+// Copyright (C) 2002-2005 Maxim Shemanarev (http://www.antigrain.com)
+//
+// Permission to copy, use, modify, sell and distribute this software 
+// is granted provided this copyright notice appears in all copies. 
+// This software is provided "as is" without express or implied
+// warranty, and with no claim as to its suitability for any purpose.
+//
+//----------------------------------------------------------------------------
+// Contact: mcseem@antigrain.com
+//          mcseemagg@yahoo.com
+//          http://www.antigrain.com
+//----------------------------------------------------------------------------
+
+#ifndef AGG_BITSET_ITERATOR_INCLUDED
+#define AGG_BITSET_ITERATOR_INCLUDED
+
+#include "agg_basics.h"
+
+namespace agg
+{
+    
+    class bitset_iterator
+    {
+    public:
+        bitset_iterator(const int8u* bits, unsigned offset = 0) :
+            m_bits(bits + (offset >> 3)),
+            m_mask(0x80 >> (offset & 7))
+        {}
+
+        void operator ++ ()
+        {
+            m_mask >>= 1;
+            if(m_mask == 0)
+            {
+                ++m_bits;
+                m_mask = 0x80;
+            }
+        }
+
+        unsigned bit() const
+        {
+            return (*m_bits) & m_mask;
+        }
+
+    private:
+        const int8u* m_bits;
+        int8u        m_mask;
+    };
+
+}
+
+#endif
--- a/dep/agg/include/agg_blur.h
+++ b/dep/agg/include/agg_blur.h
--- a/dep/agg/include/agg_bounding_rect.h
+++ b/dep/agg/include/agg_bounding_rect.h
@@ -0,0 +1,116 @@
+//----------------------------------------------------------------------------
+// Anti-Grain Geometry - Version 2.4
+// Copyright (C) 2002-2005 Maxim Shemanarev (http://www.antigrain.com)
+//
+// Permission to copy, use, modify, sell and distribute this software 
+// is granted provided this copyright notice appears in all copies. 
+// This software is provided "as is" without express or implied
+// warranty, and with no claim as to its suitability for any purpose.
+//
+//----------------------------------------------------------------------------
+// Contact: mcseem@antigrain.com
+//          mcseemagg@yahoo.com
+//          http://www.antigrain.com
+//----------------------------------------------------------------------------
+//
+// bounding_rect function template
+//
+//----------------------------------------------------------------------------
+#ifndef AGG_BOUNDING_RECT_INCLUDED
+#define AGG_BOUNDING_RECT_INCLUDED
+
+#include "agg_basics.h"
+
+namespace agg
+{
+
+    //-----------------------------------------------------------bounding_rect
+    template<class VertexSource, class GetId, class CoordT>
+    bool bounding_rect(VertexSource& vs, GetId& gi, 
+                       unsigned start, unsigned num, 
+                       CoordT* x1, CoordT* y1, CoordT* x2, CoordT* y2)
+    {
+        unsigned i;
+        double x;
+        double y;
+        bool first = true;
+
+        *x1 = CoordT(1);
+        *y1 = CoordT(1);
+        *x2 = CoordT(0);
+        *y2 = CoordT(0);
+
+        for(i = 0; i < num; i++)
+        {
+            vs.rewind(gi[start + i]);
+            unsigned cmd;
+            while(!is_stop(cmd = vs.vertex(&x, &y)))
+            {
+                if(is_vertex(cmd))
+                {
+                    if(first)
+                    {
+                        *x1 = CoordT(x);
+                        *y1 = CoordT(y);
+                        *x2 = CoordT(x);
+                        *y2 = CoordT(y);
+                        first = false;
+                    }
+                    else
+                    {
+                        if(CoordT(x) < *x1) *x1 = CoordT(x);
+                        if(CoordT(y) < *y1) *y1 = CoordT(y);
+                        if(CoordT(x) > *x2) *x2 = CoordT(x);
+                        if(CoordT(y) > *y2) *y2 = CoordT(y);
+                    }
+                }
+            }
+        }
+        return *x1 <= *x2 && *y1 <= *y2;
+    }
+
+
+    //-----------------------------------------------------bounding_rect_single
+    template<class VertexSource, class CoordT> 
+    bool bounding_rect_single(VertexSource& vs, unsigned path_id,
+                              CoordT* x1, CoordT* y1, CoordT* x2, CoordT* y2)
+    {
+        double x;
+        double y;
+        bool first = true;
+
+        *x1 = CoordT(1);
+        *y1 = CoordT(1);
+        *x2 = CoordT(0);
+        *y2 = CoordT(0);
+
+        vs.rewind(path_id);
+        unsigned cmd;
+        while(!is_stop(cmd = vs.vertex(&x, &y)))
+        {
+            if(is_vertex(cmd))
+            {
+                if(first)
+                {
+                    *x1 = CoordT(x);
+                    *y1 = CoordT(y);
+                    *x2 = CoordT(x);
+                    *y2 = CoordT(y);
+                    first = false;
+                }
+                else
+                {
+                    if(CoordT(x) < *x1) *x1 = CoordT(x);
+                    if(CoordT(y) < *y1) *y1 = CoordT(y);
+                    if(CoordT(x) > *x2) *x2 = CoordT(x);
+                    if(CoordT(y) > *y2) *y2 = CoordT(y);
+                }
+            }
+        }
+        return *x1 <= *x2 && *y1 <= *y2;
+    }
+
+
+}
+
+#endif
--- a/dep/agg/include/agg_bspline.h
+++ b/dep/agg/include/agg_bspline.h
@@ -0,0 +1,76 @@
+//----------------------------------------------------------------------------
+// Anti-Grain Geometry - Version 2.4
+// Copyright (C) 2002-2005 Maxim Shemanarev (http://www.antigrain.com)
+//
+// Permission to copy, use, modify, sell and distribute this software 
+// is granted provided this copyright notice appears in all copies. 
+// This software is provided "as is" without express or implied
+// warranty, and with no claim as to its suitability for any purpose.
+//
+//----------------------------------------------------------------------------
+// Contact: mcseem@antigrain.com
+//          mcseemagg@yahoo.com
+//          http://www.antigrain.com
+//----------------------------------------------------------------------------
+//
+// class bspline
+//
+//----------------------------------------------------------------------------
+
+#ifndef AGG_BSPLINE_INCLUDED
+#define AGG_BSPLINE_INCLUDED
+
+#include "agg_array.h"
+
+namespace agg
+{
+    //----------------------------------------------------------------bspline
+    // A very simple class of Bi-cubic Spline interpolation.
+    // First call init(num, x[], y[]) where num - number of source points, 
+    // x, y - arrays of X and Y values respectively. Here Y must be a function 
+    // of X. It means that all the X-coordinates must be arranged in the ascending
+    // order. 
+    // Then call get(x) that calculates a value Y for the respective X. 
+    // The class supports extrapolation, i.e. you can call get(x) where x is
+    // outside the given with init() X-range. Extrapolation is a simple linear 
+    // function.
+    //
+    //  See Implementation agg_bspline.cpp
+    //------------------------------------------------------------------------
+    class bspline 
+    {
+    public:
+        bspline();
+        bspline(int num);
+        bspline(int num, const double* x, const double* y);
+
+        void   init(int num);
+        void   add_point(double x, double y);
+        void   prepare();
+
+        void   init(int num, const double* x, const double* y);
+
+        double get(double x) const;
+        double get_stateful(double x) const;
+    
+    private:
+        bspline(const bspline&);
+        const bspline& operator = (const bspline&);
+
+        static void bsearch(int n, const double *x, double x0, int *i);
+        double extrapolation_left(double x) const;
+        double extrapolation_right(double x) const;
+        double interpolation(double x, int i) const;
+
+        int               m_max;
+        int               m_num;
+        double*           m_x;
+        double*           m_y;
+        pod_array<double> m_am;
+        mutable int       m_last_idx;
+    };
+
+
+}
+
+#endif
--- a/dep/agg/include/agg_clip_liang_barsky.h
+++ b/dep/agg/include/agg_clip_liang_barsky.h
@@ -0,0 +1,333 @@
+//----------------------------------------------------------------------------
+// Anti-Grain Geometry - Version 2.4
+// Copyright (C) 2002-2005 Maxim Shemanarev (http://www.antigrain.com)
+//
+// Permission to copy, use, modify, sell and distribute this software 
+// is granted provided this copyright notice appears in all copies. 
+// This software is provided "as is" without express or implied
+// warranty, and with no claim as to its suitability for any purpose.
+//
+//----------------------------------------------------------------------------
+// Contact: mcseem@antigrain.com
+//          mcseemagg@yahoo.com
+//          http://www.antigrain.com
+//----------------------------------------------------------------------------
+//
+// Liang-Barsky clipping 
+//
+//----------------------------------------------------------------------------
+#ifndef AGG_CLIP_LIANG_BARSKY_INCLUDED
+#define AGG_CLIP_LIANG_BARSKY_INCLUDED
+
+#include "agg_basics.h"
+
+namespace agg
+{
+
+    //------------------------------------------------------------------------
+    enum clipping_flags_e
+    {
+        clipping_flags_x1_clipped = 4,
+        clipping_flags_x2_clipped = 1,
+        clipping_flags_y1_clipped = 8,
+        clipping_flags_y2_clipped = 2,
+        clipping_flags_x_clipped = clipping_flags_x1_clipped | clipping_flags_x2_clipped,
+        clipping_flags_y_clipped = clipping_flags_y1_clipped | clipping_flags_y2_clipped
+    };
+
+    //----------------------------------------------------------clipping_flags
+    // Determine the clipping code of the vertex according to the 
+    // Cyrus-Beck line clipping algorithm
+    //
+    //        |        |
+    //  0110  |  0010  | 0011
+    //        |        |
+    // -------+--------+-------- clip_box.y2
+    //        |        |
+    //  0100  |  0000  | 0001
+    //        |        |
+    // -------+--------+-------- clip_box.y1
+    //        |        |
+    //  1100  |  1000  | 1001
+    //        |        |
+    //  clip_box.x1  clip_box.x2
+    //
+    // 
+    template<class T>
+    inline unsigned clipping_flags(T x, T y, const rect_base<T>& clip_box)
+    {
+        return  (x > clip_box.x2) |
+               ((y > clip_box.y2) << 1) |
+               ((x < clip_box.x1) << 2) |
+               ((y < clip_box.y1) << 3);
+    }
+
+    //--------------------------------------------------------clipping_flags_x
+    template<class T>
+    inline unsigned clipping_flags_x(T x, const rect_base<T>& clip_box)
+    {
+        return  (x > clip_box.x2) | ((x < clip_box.x1) << 2);
+    }
+
+
+    //--------------------------------------------------------clipping_flags_y
+    template<class T>
+    inline unsigned clipping_flags_y(T y, const rect_base<T>& clip_box)
+    {
+        return ((y > clip_box.y2) << 1) | ((y < clip_box.y1) << 3);
+    }
+
+
+    //-------------------------------------------------------clip_liang_barsky
+    template<class T>
+    inline unsigned clip_liang_barsky(T x1, T y1, T x2, T y2,
+                                      const rect_base<T>& clip_box,
+                                      T* x, T* y)
+    {
+        const double nearzero = 1e-30;
+
+        double deltax = x2 - x1;
+        double deltay = y2 - y1; 
+        double xin;
+        double xout;
+        double yin;
+        double yout;
+        double tinx;
+        double tiny;
+        double toutx;
+        double touty;  
+        double tin1;
+        double tin2;
+        double tout1;
+        unsigned np = 0;
+
+        if(deltax == 0.0) 
+        {   
+            // bump off of the vertical
+            deltax = (x1 > clip_box.x1) ? -nearzero : nearzero;
+        }
+
+        if(deltay == 0.0) 
+        { 
+            // bump off of the horizontal 
+            deltay = (y1 > clip_box.y1) ? -nearzero : nearzero;
+        }
+        
+        if(deltax > 0.0) 
+        {                
+            // points to right
+            xin  = clip_box.x1;
+            xout = clip_box.x2;
+        }
+        else 
+        {
+            xin  = clip_box.x2;
+            xout = clip_box.x1;
+        }
+
+        if(deltay > 0.0) 
+        {
+            // points up
+            yin  = clip_box.y1;
+            yout = clip_box.y2;
+        }
+        else 
+        {
+            yin  = clip_box.y2;
+            yout = clip_box.y1;
+        }
+        
+        tinx = (xin - x1) / deltax;
+        tiny = (yin - y1) / deltay;
+        
+        if (tinx < tiny) 
+        {
+            // hits x first
+            tin1 = tinx;
+            tin2 = tiny;
+        }
+        else
+        {
+            // hits y first
+            tin1 = tiny;
+            tin2 = tinx;
+        }
+        
+        if(tin1 <= 1.0) 
+        {
+            if(0.0 < tin1) 
+            {
+                *x++ = (T)xin;
+                *y++ = (T)yin;
+                ++np;
+            }
+
+            if(tin2 <= 1.0)
+            {
+                toutx = (xout - x1) / deltax;
+                touty = (yout - y1) / deltay;
+                
+                tout1 = (toutx < touty) ? toutx : touty;
+                
+                if(tin2 > 0.0 || tout1 > 0.0) 
+                {
+                    if(tin2 <= tout1) 
+                    {
+                        if(tin2 > 0.0) 
+                        {
+                            if(tinx > tiny) 
+                            {
+                                *x++ = (T)xin;
+                                *y++ = (T)(y1 + tinx * deltay);
+                            }
+                            else 
+                            {
+                                *x++ = (T)(x1 + tiny * deltax);
+                                *y++ = (T)yin;
+                            }
+                            ++np;
+                        }
+
+                        if(tout1 < 1.0) 
+                        {
+                            if(toutx < touty) 
+                            {
+                                *x++ = (T)xout;
+                                *y++ = (T)(y1 + toutx * deltay);
+                            }
+                            else 
+                            {
+                                *x++ = (T)(x1 + touty * deltax);
+                                *y++ = (T)yout;
+                            }
+                        }
+                        else 
+                        {
+                            *x++ = x2;
+                            *y++ = y2;
+                        }
+                        ++np;
+                    }
+                    else 
+                    {
+                        if(tinx > tiny) 
+                        {
+                            *x++ = (T)xin;
+                            *y++ = (T)yout;
+                        }
+                        else 
+                        {
+                            *x++ = (T)xout;
+                            *y++ = (T)yin;
+                        }
+                        ++np;
+                    }
+                }
+            }
+        }
+        return np;
+    }
+
+
+    //----------------------------------------------------------------------------
+    template<class T>
+    bool clip_move_point(T x1, T y1, T x2, T y2, 
+                         const rect_base<T>& clip_box, 
+                         T* x, T* y, unsigned flags)
+    {
+       T bound;
+
+       if(flags & clipping_flags_x_clipped)
+       {
+           if(x1 == x2)
+           {
+               return false;
+           }
+           bound = (flags & clipping_flags_x1_clipped) ? clip_box.x1 : clip_box.x2;
+           *y = (T)(double(bound - x1) * (y2 - y1) / (x2 - x1) + y1);
+           *x = bound;
+       }
+
+       flags = clipping_flags_y(*y, clip_box);
+       if(flags & clipping_flags_y_clipped)
+       {
+           if(y1 == y2)
+           {
+               return false;
+           }
+           bound = (flags & clipping_flags_y1_clipped) ? clip_box.y1 : clip_box.y2;
+           *x = (T)(double(bound - y1) * (x2 - x1) / (y2 - y1) + x1);
+           *y = bound;
+       }
+       return true;
+    }
+
+    //-------------------------------------------------------clip_line_segment
+    // Returns: ret >= 4        - Fully clipped
+    //          (ret & 1) != 0  - First point has been moved
+    //          (ret & 2) != 0  - Second point has been moved
+    //
+    template<class T>
+    unsigned clip_line_segment(T* x1, T* y1, T* x2, T* y2,
+                               const rect_base<T>& clip_box)
+    {
+        unsigned f1 = clipping_flags(*x1, *y1, clip_box);
+        unsigned f2 = clipping_flags(*x2, *y2, clip_box);
+        unsigned ret = 0;
+
+        if((f2 | f1) == 0)
+        {
+            // Fully visible
+            return 0;
+        }
+
+        if((f1 & clipping_flags_x_clipped) != 0 && 
+           (f1 & clipping_flags_x_clipped) == (f2 & clipping_flags_x_clipped))
+        {
+            // Fully clipped
+            return 4;
+        }
+
+        if((f1 & clipping_flags_y_clipped) != 0 && 
+           (f1 & clipping_flags_y_clipped) == (f2 & clipping_flags_y_clipped))
+        {
+            // Fully clipped
+            return 4;
+        }
+
+        T tx1 = *x1;
+        T ty1 = *y1;
+        T tx2 = *x2;
+        T ty2 = *y2;
+        if(f1) 
+        {   
+            if(!clip_move_point(tx1, ty1, tx2, ty2, clip_box, x1, y1, f1)) 
+            {
+                return 4;
+            }
+            if(*x1 == *x2 && *y1 == *y2) 
+            {
+                return 4;
+            }
+            ret |= 1;
+        }
+        if(f2) 
+        {
+            if(!clip_move_point(tx1, ty1, tx2, ty2, clip_box, x2, y2, f2))
+            {
+                return 4;
+            }
+            if(*x1 == *x2 && *y1 == *y2) 
+            {
+                return 4;
+            }
+            ret |= 2;
+        }
+        return ret;
+    }
+
+
+}
+
+
+#endif
--- a/dep/agg/include/agg_color_gray.h
+++ b/dep/agg/include/agg_color_gray.h
--- a/dep/agg/include/agg_color_rgba.h
+++ b/dep/agg/include/agg_color_rgba.h
--- a/dep/agg/include/agg_config.h
+++ b/dep/agg/include/agg_config.h
@@ -0,0 +1,44 @@
+#ifndef AGG_CONFIG_INCLUDED
+#define AGG_CONFIG_INCLUDED
+
+// This file can be used to redefine certain data types.
+
+//---------------------------------------
+// 1. Default basic types such as:
+// 
+// AGG_INT8
+// AGG_INT8U
+// AGG_INT16
+// AGG_INT16U
+// AGG_INT32
+// AGG_INT32U
+// AGG_INT64
+// AGG_INT64U
+//
+// Just replace this file with new defines if necessary. 
+// For example, if your compiler doesn't have a 64 bit integer type
+// you can still use AGG if you define the follows:
+//
+// #define AGG_INT64  int
+// #define AGG_INT64U unsigned
+//
+// It will result in overflow in 16 bit-per-component image/pattern resampling
+// but it won't result any crash and the rest of the library will remain 
+// fully functional.
+
+
+//---------------------------------------
+// 2. Default rendering_buffer type. Can be:
+//
+// Provides faster access for massive pixel operations, 
+// such as blur, image filtering:
+// #define AGG_RENDERING_BUFFER row_ptr_cache<int8u>
+// 
+// Provides cheaper creation and destruction (no mem allocs):
+// #define AGG_RENDERING_BUFFER row_accessor<int8u>
+//
+// You can still use both of them simultaneously in your applications 
+// This #define is used only for default rendering_buffer type,
+// in short hand typedefs like pixfmt_rgba32.
+
+#endif
--- a/dep/agg/include/agg_conv_adaptor_vcgen.h
+++ b/dep/agg/include/agg_conv_adaptor_vcgen.h
@@ -0,0 +1,157 @@
+//----------------------------------------------------------------------------
+// Anti-Grain Geometry - Version 2.4
+// Copyright (C) 2002-2005 Maxim Shemanarev (http://www.antigrain.com)
+//
+// Permission to copy, use, modify, sell and distribute this software 
+// is granted provided this copyright notice appears in all copies. 
+// This software is provided "as is" without express or implied
+// warranty, and with no claim as to its suitability for any purpose.
+//
+//----------------------------------------------------------------------------
+// Contact: mcseem@antigrain.com
+//          mcseemagg@yahoo.com
+//          http://www.antigrain.com
+//----------------------------------------------------------------------------
+
+#ifndef AGG_CONV_ADAPTOR_VCGEN_INCLUDED
+#define AGG_CONV_ADAPTOR_VCGEN_INCLUDED
+
+#include "agg_basics.h"
+
+namespace agg
+{
+    //------------------------------------------------------------null_markers
+    struct null_markers
+    {
+        void remove_all() {}
+        void add_vertex(double, double, unsigned) {}
+        void prepare_src() {}
+
+        void rewind(unsigned) {}
+        unsigned vertex(double*, double*) { return path_cmd_stop; }
+    };
+
+
+    //------------------------------------------------------conv_adaptor_vcgen
+    template<class VertexSource, 
+             class Generator, 
+             class Markers=null_markers> class conv_adaptor_vcgen
+    {
+        enum status
+        {
+            initial,
+            accumulate,
+            generate
+        };
+
+    public:
+        explicit conv_adaptor_vcgen(VertexSource& source) :
+            m_source(&source), 
+            m_status(initial)
+        {}
+        void attach(VertexSource& source) { m_source = &source; }
+
+        Generator& generator() { return m_generator; }
+        const Generator& generator() const { return m_generator; }
+
+        Markers& markers() { return m_markers; }
+        const Markers& markers() const { return m_markers; }
+        
+        void rewind(unsigned path_id) 
+        { 
+            m_source->rewind(path_id); 
+            m_status = initial;
+        }
+
+        unsigned vertex(double* x, double* y);
+
+    private:
+        // Prohibit copying
+        conv_adaptor_vcgen(const conv_adaptor_vcgen<VertexSource, Generator, Markers>&);
+        const conv_adaptor_vcgen<VertexSource, Generator, Markers>& 
+            operator = (const conv_adaptor_vcgen<VertexSource, Generator, Markers>&);
+
+        VertexSource* m_source;
+        Generator     m_generator;
+        Markers       m_markers;
+        status        m_status;
+        unsigned      m_last_cmd;
+        double        m_start_x;
+        double        m_start_y;
+    };
+
+
+
+
+
+    //------------------------------------------------------------------------
+    template<class VertexSource, class Generator, class Markers> 
+    unsigned conv_adaptor_vcgen<VertexSource, Generator, Markers>::vertex(double* x, double* y)
+    {
+        unsigned cmd = path_cmd_stop;
+        bool done = false;
+        while(!done)
+        {
+            switch(m_status)
+            {
+            case initial:
+                m_markers.remove_all();
+                m_last_cmd = m_source->vertex(&m_start_x, &m_start_y);
+                m_status = accumulate;
+
+            case accumulate:
+                if(is_stop(m_last_cmd)) return path_cmd_stop;
+
+                m_generator.remove_all();
+                m_generator.add_vertex(m_start_x, m_start_y, path_cmd_move_to);
+                m_markers.add_vertex(m_start_x, m_start_y, path_cmd_move_to);
+
+                for(;;)
+                {
+                    cmd = m_source->vertex(x, y);
+                    if(is_vertex(cmd))
+                    {
+                        m_last_cmd = cmd;
+                        if(is_move_to(cmd))
+                        {
+                            m_start_x = *x;
+                            m_start_y = *y;
+                            break;
+                        }
+                        m_generator.add_vertex(*x, *y, cmd);
+                        m_markers.add_vertex(*x, *y, path_cmd_line_to);
+                    }
+                    else
+                    {
+                        if(is_stop(cmd))
+                        {
+                            m_last_cmd = path_cmd_stop;
+                            break;
+                        }
+                        if(is_end_poly(cmd))
+                        {
+                            m_generator.add_vertex(*x, *y, cmd);
+                            break;
+                        }
+                    }
+                }
+                m_generator.rewind(0);
+                m_status = generate;
+
+            case generate:
+                cmd = m_generator.vertex(x, y);
+                if(is_stop(cmd))
+                {
+                    m_status = accumulate;
+                    break;
+                }
+                done = true;
+                break;
+            }
+        }
+        return cmd;
+    }
+
+}
+
+#endif
--- a/dep/agg/include/agg_conv_adaptor_vpgen.h
+++ b/dep/agg/include/agg_conv_adaptor_vpgen.h
@@ -0,0 +1,159 @@
+//----------------------------------------------------------------------------
+// Anti-Grain Geometry - Version 2.4
+// Copyright (C) 2002-2005 Maxim Shemanarev (http://www.antigrain.com)
+//
+// Permission to copy, use, modify, sell and distribute this software 
+// is granted provided this copyright notice appears in all copies. 
+// This software is provided "as is" without express or implied
+// warranty, and with no claim as to its suitability for any purpose.
+//
+//----------------------------------------------------------------------------
+// Contact: mcseem@antigrain.com
+//          mcseemagg@yahoo.com
+//          http://www.antigrain.com
+//----------------------------------------------------------------------------
+
+#ifndef AGG_CONV_ADAPTOR_VPGEN_INCLUDED
+#define AGG_CONV_ADAPTOR_VPGEN_INCLUDED
+
+#include "agg_basics.h"
+
+namespace agg
+{
+
+    //======================================================conv_adaptor_vpgen
+    template<class VertexSource, class VPGen> class conv_adaptor_vpgen
+    {
+    public:
+        explicit conv_adaptor_vpgen(VertexSource& source) : m_source(&source) {}
+        void attach(VertexSource& source) { m_source = &source; }
+
+        VPGen& vpgen() { return m_vpgen; }
+        const VPGen& vpgen() const { return m_vpgen; }
+
+        void rewind(unsigned path_id);
+        unsigned vertex(double* x, double* y);
+
+    private:
+        conv_adaptor_vpgen(const conv_adaptor_vpgen<VertexSource, VPGen>&);
+        const conv_adaptor_vpgen<VertexSource, VPGen>& 
+            operator = (const conv_adaptor_vpgen<VertexSource, VPGen>&);
+
+        VertexSource* m_source;
+        VPGen         m_vpgen;
+        double        m_start_x;
+        double        m_start_y;
+        unsigned      m_poly_flags;
+        int           m_vertices;
+    };
+
+
+
+    //------------------------------------------------------------------------
+    template<class VertexSource, class VPGen>
+    void conv_adaptor_vpgen<VertexSource, VPGen>::rewind(unsigned path_id) 
+    { 
+        m_source->rewind(path_id);
+        m_vpgen.reset();
+        m_start_x    = 0;
+        m_start_y    = 0;
+        m_poly_flags = 0;
+        m_vertices   = 0;
+    }
+
+
+    //------------------------------------------------------------------------
+    template<class VertexSource, class VPGen>
+    unsigned conv_adaptor_vpgen<VertexSource, VPGen>::vertex(double* x, double* y)
+    {
+        unsigned cmd = path_cmd_stop;
+        for(;;)
+        {
+            cmd = m_vpgen.vertex(x, y);
+            if(!is_stop(cmd)) break;
+
+            if(m_poly_flags && !m_vpgen.auto_unclose())
+            {
+                *x = 0.0;
+                *y = 0.0;
+                cmd = m_poly_flags;
+                m_poly_flags = 0;
+                break;
+            }
+
+            if(m_vertices < 0)
+            {
+                if(m_vertices < -1) 
+                {
+                    m_vertices = 0;
+                    return path_cmd_stop;
+                }
+                m_vpgen.move_to(m_start_x, m_start_y);
+                m_vertices = 1;
+                continue;
+            }
+
+            double tx, ty;
+            cmd = m_source->vertex(&tx, &ty);
+            if(is_vertex(cmd))
+            {
+                if(is_move_to(cmd)) 
+                {
+                    if(m_vpgen.auto_close() && m_vertices > 2)
+                    {
+                        m_vpgen.line_to(m_start_x, m_start_y);
+                        m_poly_flags = path_cmd_end_poly | path_flags_close;
+                        m_start_x    = tx;
+                        m_start_y    = ty;
+                        m_vertices   = -1;
+                        continue;
+                    }
+                    m_vpgen.move_to(tx, ty);
+                    m_start_x  = tx;
+                    m_start_y  = ty;
+                    m_vertices = 1;
+                }
+                else 
+                {
+                    m_vpgen.line_to(tx, ty);
+                    ++m_vertices;
+                }
+            }
+            else
+            {
+                if(is_end_poly(cmd))
+                {
+                    m_poly_flags = cmd;
+                    if(is_closed(cmd) || m_vpgen.auto_close())
+                    {
+                        if(m_vpgen.auto_close()) m_poly_flags |= path_flags_close;
+                        if(m_vertices > 2)
+                        {
+                            m_vpgen.line_to(m_start_x, m_start_y);
+                        }
+                        m_vertices = 0;
+                    }
+                }
+                else
+                {
+                    // path_cmd_stop
+                    if(m_vpgen.auto_close() && m_vertices > 2)
+                    {
+                        m_vpgen.line_to(m_start_x, m_start_y);
+                        m_poly_flags = path_cmd_end_poly | path_flags_close;
+                        m_vertices   = -2;
+                        continue;
+                    }
+                    break;
+                }
+            }
+        }
+        return cmd;
+    }
+
+
+}
+
+
+#endif
+
--- a/dep/agg/include/agg_conv_bspline.h
+++ b/dep/agg/include/agg_conv_bspline.h
@@ -0,0 +1,48 @@
+//----------------------------------------------------------------------------
+// Anti-Grain Geometry - Version 2.4
+// Copyright (C) 2002-2005 Maxim Shemanarev (http://www.antigrain.com)
+//
+// Permission to copy, use, modify, sell and distribute this software 
+// is granted provided this copyright notice appears in all copies. 
+// This software is provided "as is" without express or implied
+// warranty, and with no claim as to its suitability for any purpose.
+//
+//----------------------------------------------------------------------------
+// Contact: mcseem@antigrain.com
+//          mcseemagg@yahoo.com
+//          http://www.antigrain.com
+//----------------------------------------------------------------------------
+#ifndef AGG_CONV_BSPLINE_INCLUDED
+#define AGG_CONV_BSPLINE_INCLUDED
+
+#include "agg_basics.h"
+#include "agg_vcgen_bspline.h"
+#include "agg_conv_adaptor_vcgen.h"
+
+
+namespace agg
+{
+
+    //---------------------------------------------------------conv_bspline
+    template<class VertexSource> 
+    struct conv_bspline : public conv_adaptor_vcgen<VertexSource, vcgen_bspline>
+    {
+        typedef conv_adaptor_vcgen<VertexSource, vcgen_bspline> base_type;
+
+        conv_bspline(VertexSource& vs) : 
+            conv_adaptor_vcgen<VertexSource, vcgen_bspline>(vs) {}
+
+        void   interpolation_step(double v) { base_type::generator().interpolation_step(v); }
+        double interpolation_step() const { return base_type::generator().interpolation_step(); }
+
+    private:
+        conv_bspline(const conv_bspline<VertexSource>&);
+        const conv_bspline<VertexSource>& 
+            operator = (const conv_bspline<VertexSource>&);
+    };
+
+}
+
+
+#endif
+
--- a/dep/agg/include/agg_conv_clip_polygon.h
+++ b/dep/agg/include/agg_conv_clip_polygon.h
@@ -0,0 +1,63 @@
+//----------------------------------------------------------------------------
+// Anti-Grain Geometry - Version 2.4
+// Copyright (C) 2002-2005 Maxim Shemanarev (http://www.antigrain.com)
+//
+// Permission to copy, use, modify, sell and distribute this software 
+// is granted provided this copyright notice appears in all copies. 
+// This software is provided "as is" without express or implied
+// warranty, and with no claim as to its suitability for any purpose.
+//
+//----------------------------------------------------------------------------
+// Contact: mcseem@antigrain.com
+//          mcseemagg@yahoo.com
+//          http://www.antigrain.com
+//----------------------------------------------------------------------------
+//
+// Polygon clipping converter
+// There an optimized Liang-Basky algorithm is used. 
+// The algorithm doesn't optimize the degenerate edges, i.e. it will never
+// break a closed polygon into two or more ones, instead, there will be 
+// degenerate edges coinciding with the respective clipping boundaries.
+// This is a sub-optimal solution, because that optimization would require 
+// extra, rather expensive math while the rasterizer tolerates it quite well, 
+// without any considerable overhead.
+//
+//----------------------------------------------------------------------------
+#ifndef AGG_CONV_CLIP_POLYGON_INCLUDED
+#define AGG_CONV_CLIP_POLYGON_INCLUDED
+
+#include "agg_basics.h"
+#include "agg_conv_adaptor_vpgen.h"
+#include "agg_vpgen_clip_polygon.h"
+
+namespace agg
+{
+
+    //=======================================================conv_clip_polygon
+    template<class VertexSource> 
+    struct conv_clip_polygon : public conv_adaptor_vpgen<VertexSource, vpgen_clip_polygon>
+    {
+        typedef conv_adaptor_vpgen<VertexSource, vpgen_clip_polygon> base_type;
+
+        conv_clip_polygon(VertexSource& vs) : 
+            conv_adaptor_vpgen<VertexSource, vpgen_clip_polygon>(vs) {}
+
+        void clip_box(double x1, double y1, double x2, double y2)
+        {
+            base_type::vpgen().clip_box(x1, y1, x2, y2);
+        }
+
+        double x1() const { return base_type::vpgen().x1(); }
+        double y1() const { return base_type::vpgen().y1(); }
+        double x2() const { return base_type::vpgen().x2(); }
+        double y2() const { return base_type::vpgen().y2(); }
+
+    private:
+        conv_clip_polygon(const conv_clip_polygon<VertexSource>&);
+        const conv_clip_polygon<VertexSource>& 
+            operator = (const conv_clip_polygon<VertexSource>&);
+    };
+
+}
+
+#endif
--- a/dep/agg/include/agg_conv_clip_polyline.h
+++ b/dep/agg/include/agg_conv_clip_polyline.h
@@ -0,0 +1,63 @@
+//----------------------------------------------------------------------------
+// Anti-Grain Geometry - Version 2.4
+// Copyright (C) 2002-2005 Maxim Shemanarev (http://www.antigrain.com)
+//
+// Permission to copy, use, modify, sell and distribute this software 
+// is granted provided this copyright notice appears in all copies. 
+// This software is provided "as is" without express or implied
+// warranty, and with no claim as to its suitability for any purpose.
+//
+//----------------------------------------------------------------------------
+// Contact: mcseem@antigrain.com
+//          mcseemagg@yahoo.com
+//          http://www.antigrain.com
+//----------------------------------------------------------------------------
+//
+// polyline clipping converter
+// There an optimized Liang-Basky algorithm is used. 
+// The algorithm doesn't optimize the degenerate edges, i.e. it will never
+// break a closed polyline into two or more ones, instead, there will be 
+// degenerate edges coinciding with the respective clipping boundaries.
+// This is a sub-optimal solution, because that optimization would require 
+// extra, rather expensive math while the rasterizer tolerates it quite well, 
+// without any considerable overhead.
+//
+//----------------------------------------------------------------------------
+#ifndef AGG_CONV_CLIP_polyline_INCLUDED
+#define AGG_CONV_CLIP_polyline_INCLUDED
+
+#include "agg_basics.h"
+#include "agg_conv_adaptor_vpgen.h"
+#include "agg_vpgen_clip_polyline.h"
+
+namespace agg
+{
+
+    //=======================================================conv_clip_polyline
+    template<class VertexSource> 
+    struct conv_clip_polyline : public conv_adaptor_vpgen<VertexSource, vpgen_clip_polyline>
+    {
+        typedef conv_adaptor_vpgen<VertexSource, vpgen_clip_polyline> base_type;
+
+        conv_clip_polyline(VertexSource& vs) : 
+            conv_adaptor_vpgen<VertexSource, vpgen_clip_polyline>(vs) {}
+
+        void clip_box(double x1, double y1, double x2, double y2)
+        {
+            base_type::vpgen().clip_box(x1, y1, x2, y2);
+        }
+
+        double x1() const { return base_type::vpgen().x1(); }
+        double y1() const { return base_type::vpgen().y1(); }
+        double x2() const { return base_type::vpgen().x2(); }
+        double y2() const { return base_type::vpgen().y2(); }
+
+    private:
+        conv_clip_polyline(const conv_clip_polyline<VertexSource>&);
+        const conv_clip_polyline<VertexSource>& 
+            operator = (const conv_clip_polyline<VertexSource>&);
+    };
+
+}
+
+#endif
--- a/dep/agg/include/agg_conv_close_polygon.h
+++ b/dep/agg/include/agg_conv_close_polygon.h
@@ -0,0 +1,125 @@
+//----------------------------------------------------------------------------
+// Anti-Grain Geometry - Version 2.4
+// Copyright (C) 2002-2005 Maxim Shemanarev (http://www.antigrain.com)
+//
+// Permission to copy, use, modify, sell and distribute this software 
+// is granted provided this copyright notice appears in all copies. 
+// This software is provided "as is" without express or implied
+// warranty, and with no claim as to its suitability for any purpose.
+//
+//----------------------------------------------------------------------------
+// Contact: mcseem@antigrain.com
+//          mcseemagg@yahoo.com
+//          http://www.antigrain.com
+//----------------------------------------------------------------------------
+
+#ifndef AGG_CONV_CLOSE_POLYGON_INCLUDED
+#define AGG_CONV_CLOSE_POLYGON_INCLUDED
+
+#include "agg_basics.h"
+
+namespace agg
+{
+
+    //======================================================conv_close_polygon
+    template<class VertexSource> class conv_close_polygon
+    {
+    public:
+        explicit conv_close_polygon(VertexSource& vs) : m_source(&vs) {}
+        void attach(VertexSource& source) { m_source = &source; }
+
+        void rewind(unsigned path_id);
+        unsigned vertex(double* x, double* y);
+
+    private:
+        conv_close_polygon(const conv_close_polygon<VertexSource>&);
+        const conv_close_polygon<VertexSource>& 
+            operator = (const conv_close_polygon<VertexSource>&);
+
+        VertexSource* m_source;
+        unsigned      m_cmd[2];
+        double        m_x[2];
+        double        m_y[2];
+        unsigned      m_vertex;
+        bool          m_line_to;
+    };
+
+
+
+    //------------------------------------------------------------------------
+    template<class VertexSource> 
+    void conv_close_polygon<VertexSource>::rewind(unsigned path_id)
+    {
+        m_source->rewind(path_id);
+        m_vertex = 2;
+        m_line_to = false;
+    }
+
+
+    
+    //------------------------------------------------------------------------
+    template<class VertexSource> 
+    unsigned conv_close_polygon<VertexSource>::vertex(double* x, double* y)
+    {
+        unsigned cmd = path_cmd_stop;
+        for(;;)
+        {
+            if(m_vertex < 2)
+            {
+                *x = m_x[m_vertex];
+                *y = m_y[m_vertex];
+                cmd = m_cmd[m_vertex];
+                ++m_vertex;
+                break;
+            }
+
+            cmd = m_source->vertex(x, y);
+
+            if(is_end_poly(cmd))
+            {
+                cmd |= path_flags_close;
+                break;
+            }
+
+            if(is_stop(cmd))
+            {
+                if(m_line_to)
+                {
+                    m_cmd[0]  = path_cmd_end_poly | path_flags_close;
+                    m_cmd[1]  = path_cmd_stop;
+                    m_vertex  = 0;
+                    m_line_to = false;
+                    continue;
+                }
+                break;
+            }
+
+            if(is_move_to(cmd))
+            {
+                if(m_line_to)
+                {
+                    m_x[0]    = 0.0;
+                    m_y[0]    = 0.0;
+                    m_cmd[0]  = path_cmd_end_poly | path_flags_close;
+                    m_x[1]    = *x;
+                    m_y[1]    = *y;
+                    m_cmd[1]  = cmd;
+                    m_vertex  = 0;
+                    m_line_to = false;
+                    continue;
+                }
+                break;
+            }
+
+            if(is_vertex(cmd))
+            {
+                m_line_to = true;
+                break;
+            }
+        }
+        return cmd;
+    }
+
+}
+
+#endif
--- a/dep/agg/include/agg_conv_concat.h
+++ b/dep/agg/include/agg_conv_concat.h
@@ -0,0 +1,73 @@
+//----------------------------------------------------------------------------
+// Anti-Grain Geometry - Version 2.4
+// Copyright (C) 2002-2005 Maxim Shemanarev (http://www.antigrain.com)
+//
+// Permission to copy, use, modify, sell and distribute this software 
+// is granted provided this copyright notice appears in all copies. 
+// This software is provided "as is" without express or implied
+// warranty, and with no claim as to its suitability for any purpose.
+//
+//----------------------------------------------------------------------------
+// Contact: mcseem@antigrain.com
+//          mcseemagg@yahoo.com
+//          http://www.antigrain.com
+//----------------------------------------------------------------------------
+
+#ifndef AGG_CONV_CONCAT_INCLUDED
+#define AGG_CONV_CONCAT_INCLUDED
+
+#include "agg_basics.h"
+
+namespace agg
+{
+    //=============================================================conv_concat
+    // Concatenation of two paths. Usually used to combine lines or curves 
+    // with markers such as arrowheads
+    template<class VS1, class VS2> class conv_concat
+    {
+    public:
+        conv_concat(VS1& source1, VS2& source2) :
+            m_source1(&source1), m_source2(&source2), m_status(2) {}
+        void attach1(VS1& source) { m_source1 = &source; }
+        void attach2(VS2& source) { m_source2 = &source; }
+
+
+        void rewind(unsigned path_id)
+        { 
+            m_source1->rewind(path_id);
+            m_source2->rewind(0);
+            m_status = 0;
+        }
+
+        unsigned vertex(double* x, double* y)
+        {
+            unsigned cmd;
+            if(m_status == 0)
+            {
+                cmd = m_source1->vertex(x, y);
+                if(!is_stop(cmd)) return cmd;
+                m_status = 1;
+            }
+            if(m_status == 1)
+            {
+                cmd = m_source2->vertex(x, y);
+                if(!is_stop(cmd)) return cmd;
+                m_status = 2;
+            }
+            return path_cmd_stop;
+        }
+
+    private:
+        conv_concat(const conv_concat<VS1, VS2>&);
+        const conv_concat<VS1, VS2>& 
+            operator = (const conv_concat<VS1, VS2>&);
+
+        VS1* m_source1;
+        VS2* m_source2;
+        int  m_status;
+
+    };
+}
+
+
+#endif
--- a/dep/agg/include/agg_conv_contour.h
+++ b/dep/agg/include/agg_conv_contour.h
@@ -0,0 +1,65 @@
+//----------------------------------------------------------------------------
+// Anti-Grain Geometry - Version 2.4
+// Copyright (C) 2002-2005 Maxim Shemanarev (http://www.antigrain.com)
+//
+// Permission to copy, use, modify, sell and distribute this software 
+// is granted provided this copyright notice appears in all copies. 
+// This software is provided "as is" without express or implied
+// warranty, and with no claim as to its suitability for any purpose.
+//
+//----------------------------------------------------------------------------
+// Contact: mcseem@antigrain.com
+//          mcseemagg@yahoo.com
+//          http://www.antigrain.com
+//----------------------------------------------------------------------------
+//
+// conv_stroke
+//
+//----------------------------------------------------------------------------
+#ifndef AGG_CONV_CONTOUR_INCLUDED
+#define AGG_CONV_CONTOUR_INCLUDED
+
+#include "agg_basics.h"
+#include "agg_vcgen_contour.h"
+#include "agg_conv_adaptor_vcgen.h"
+
+namespace agg
+{
+
+    //-----------------------------------------------------------conv_contour
+    template<class VertexSource> 
+    struct conv_contour : public conv_adaptor_vcgen<VertexSource, vcgen_contour>
+    {
+        typedef conv_adaptor_vcgen<VertexSource, vcgen_contour> base_type;
+
+        conv_contour(VertexSource& vs) : 
+            conv_adaptor_vcgen<VertexSource, vcgen_contour>(vs)
+        {
+        }
+
+        void line_join(line_join_e lj) { base_type::generator().line_join(lj); }
+        void inner_join(inner_join_e ij) { base_type::generator().inner_join(ij); }
+        void width(double w) { base_type::generator().width(w); }
+        void miter_limit(double ml) { base_type::generator().miter_limit(ml); }
+        void miter_limit_theta(double t) { base_type::generator().miter_limit_theta(t); }
+        void inner_miter_limit(double ml) { base_type::generator().inner_miter_limit(ml); }
+        void approximation_scale(double as) { base_type::generator().approximation_scale(as); }
+        void auto_detect_orientation(bool v) { base_type::generator().auto_detect_orientation(v); }
+
+        line_join_e line_join() const { return base_type::generator().line_join(); }
+        inner_join_e inner_join() const { return base_type::generator().inner_join(); }
+        double width() const { return base_type::generator().width(); }
+        double miter_limit() const { return base_type::generator().miter_limit(); }
+        double inner_miter_limit() const { return base_type::generator().inner_miter_limit(); }
+        double approximation_scale() const { return base_type::generator().approximation_scale(); }
+        bool auto_detect_orientation() const { return base_type::generator().auto_detect_orientation(); }
+
+    private:
+        conv_contour(const conv_contour<VertexSource>&);
+        const conv_contour<VertexSource>& 
+            operator = (const conv_contour<VertexSource>&);
+    };
+
+}
+
+#endif
--- a/dep/agg/include/agg_conv_curve.h
+++ b/dep/agg/include/agg_conv_curve.h
@@ -0,0 +1,201 @@
+//----------------------------------------------------------------------------
+// Anti-Grain Geometry - Version 2.4
+// Copyright (C) 2002-2005 Maxim Shemanarev (http://www.antigrain.com)
+//
+// Permission to copy, use, modify, sell and distribute this software 
+// is granted provided this copyright notice appears in all copies. 
+// This software is provided "as is" without express or implied
+// warranty, and with no claim as to its suitability for any purpose.
+//
+//----------------------------------------------------------------------------
+// Contact: mcseem@antigrain.com
+//          mcseemagg@yahoo.com
+//          http://www.antigrain.com
+//----------------------------------------------------------------------------
+//
+// classes conv_curve
+//
+//----------------------------------------------------------------------------
+
+#ifndef AGG_CONV_CURVE_INCLUDED
+#define AGG_CONV_CURVE_INCLUDED
+
+#include "agg_basics.h"
+#include "agg_curves.h"
+
+namespace agg
+{
+
+
+    //---------------------------------------------------------------conv_curve
+    // Curve converter class. Any path storage can have Bezier curves defined 
+    // by their control points. There're two types of curves supported: curve3 
+    // and curve4. Curve3 is a conic Bezier curve with 2 endpoints and 1 control
+    // point. Curve4 has 2 control points (4 points in total) and can be used
+    // to interpolate more complicated curves. Curve4, unlike curve3 can be used 
+    // to approximate arcs, both circular and elliptical. Curves are approximated 
+    // with straight lines and one of the approaches is just to store the whole 
+    // sequence of vertices that approximate our curve. It takes additional 
+    // memory, and at the same time the consecutive vertices can be calculated 
+    // on demand. 
+    //
+    // Initially, path storages are not suppose to keep all the vertices of the
+    // curves (although, nothing prevents us from doing so). Instead, path_storage
+    // keeps only vertices, needed to calculate a curve on demand. Those vertices
+    // are marked with special commands. So, if the path_storage contains curves 
+    // (which are not real curves yet), and we render this storage directly, 
+    // all we will see is only 2 or 3 straight line segments (for curve3 and 
+    // curve4 respectively). If we need to see real curves drawn we need to 
+    // include this class into the conversion pipeline. 
+    //
+    // Class conv_curve recognizes commands path_cmd_curve3 and path_cmd_curve4 
+    // and converts these vertices into a move_to/line_to sequence. 
+    //-----------------------------------------------------------------------
+    template<class VertexSource, 
+             class Curve3=curve3, 
+             class Curve4=curve4> class conv_curve
+    {
+    public:
+        typedef Curve3 curve3_type;
+        typedef Curve4 curve4_type;
+        typedef conv_curve<VertexSource, Curve3, Curve4> self_type;
+
+        explicit conv_curve(VertexSource& source) :
+          m_source(&source), m_last_x(0.0), m_last_y(0.0) {}
+        void attach(VertexSource& source) { m_source = &source; }
+
+        void approximation_method(curve_approximation_method_e v) 
+        { 
+            m_curve3.approximation_method(v);
+            m_curve4.approximation_method(v);
+        }
+
+        curve_approximation_method_e approximation_method() const 
+        { 
+            return m_curve4.approximation_method();
+        }
+
+        void approximation_scale(double s) 
+        { 
+            m_curve3.approximation_scale(s); 
+            m_curve4.approximation_scale(s); 
+        }
+
+        double approximation_scale() const 
+        { 
+            return m_curve4.approximation_scale();  
+        }
+
+        void angle_tolerance(double v) 
+        { 
+            m_curve3.angle_tolerance(v); 
+            m_curve4.angle_tolerance(v); 
+        }
+
+        double angle_tolerance() const 
+        { 
+            return m_curve4.angle_tolerance();  
+        }
+
+        void cusp_limit(double v) 
+        { 
+            m_curve3.cusp_limit(v); 
+            m_curve4.cusp_limit(v); 
+        }
+
+        double cusp_limit() const 
+        { 
+            return m_curve4.cusp_limit();  
+        }
+
+        void     rewind(unsigned path_id); 
+        unsigned vertex(double* x, double* y);
+
+    private:
+        conv_curve(const self_type&);
+        const self_type& operator = (const self_type&);
+
+        VertexSource* m_source;
+        double        m_last_x;
+        double        m_last_y;
+        curve3_type   m_curve3;
+        curve4_type   m_curve4;
+    };
+
+
+
+    //------------------------------------------------------------------------
+    template<class VertexSource, class Curve3, class Curve4>
+    void conv_curve<VertexSource, Curve3, Curve4>::rewind(unsigned path_id)
+    {
+        m_source->rewind(path_id);
+        m_last_x = 0.0;
+        m_last_y = 0.0;
+        m_curve3.reset();
+        m_curve4.reset();
+    }
+
+
+    //------------------------------------------------------------------------
+    template<class VertexSource, class Curve3, class Curve4>
+    unsigned conv_curve<VertexSource, Curve3, Curve4>::vertex(double* x, double* y)
+    {
+        if(!is_stop(m_curve3.vertex(x, y)))
+        {
+            m_last_x = *x;
+            m_last_y = *y;
+            return path_cmd_line_to;
+        }
+
+        if(!is_stop(m_curve4.vertex(x, y)))
+        {
+            m_last_x = *x;
+            m_last_y = *y;
+            return path_cmd_line_to;
+        }
+
+        double ct2_x = 0;
+        double ct2_y = 0;
+        double end_x = 0;
+        double end_y = 0;
+
+        unsigned cmd = m_source->vertex(x, y);
+        switch(cmd)
+        {
+        case path_cmd_curve3:
+            m_source->vertex(&end_x, &end_y);
+
+            m_curve3.init(m_last_x, m_last_y, 
+                          *x,       *y, 
+                          end_x,     end_y);
+
+            m_curve3.vertex(x, y);    // First call returns path_cmd_move_to
+            m_curve3.vertex(x, y);    // This is the first vertex of the curve
+            cmd = path_cmd_line_to;
+            break;
+
+        case path_cmd_curve4:
+            m_source->vertex(&ct2_x, &ct2_y);
+            m_source->vertex(&end_x, &end_y);
+
+            m_curve4.init(m_last_x, m_last_y, 
+                          *x,       *y, 
+                          ct2_x,    ct2_y, 
+                          end_x,    end_y);
+
+            m_curve4.vertex(x, y);    // First call returns path_cmd_move_to
+            m_curve4.vertex(x, y);    // This is the first vertex of the curve
+            cmd = path_cmd_line_to;
+            break;
+        }
+        m_last_x = *x;
+        m_last_y = *y;
+        return cmd;
+    }
+
+
+}
+
+
+
+#endif
--- a/dep/agg/include/agg_conv_dash.h
+++ b/dep/agg/include/agg_conv_dash.h
@@ -0,0 +1,68 @@
+//----------------------------------------------------------------------------
+// Anti-Grain Geometry - Version 2.4
+// Copyright (C) 2002-2005 Maxim Shemanarev (http://www.antigrain.com)
+//
+// Permission to copy, use, modify, sell and distribute this software 
+// is granted provided this copyright notice appears in all copies. 
+// This software is provided "as is" without express or implied
+// warranty, and with no claim as to its suitability for any purpose.
+//
+//----------------------------------------------------------------------------
+// Contact: mcseem@antigrain.com
+//          mcseemagg@yahoo.com
+//          http://www.antigrain.com
+//----------------------------------------------------------------------------
+//
+// conv_dash
+//
+//----------------------------------------------------------------------------
+#ifndef AGG_CONV_DASH_INCLUDED
+#define AGG_CONV_DASH_INCLUDED
+
+#include "agg_basics.h"
+#include "agg_vcgen_dash.h"
+#include "agg_conv_adaptor_vcgen.h"
+
+namespace agg
+{
+
+    //---------------------------------------------------------------conv_dash
+    template<class VertexSource, class Markers=null_markers> 
+    struct conv_dash : public conv_adaptor_vcgen<VertexSource, vcgen_dash, Markers>
+    {
+        typedef Markers marker_type;
+        typedef conv_adaptor_vcgen<VertexSource, vcgen_dash, Markers> base_type;
+
+        conv_dash(VertexSource& vs) : 
+            conv_adaptor_vcgen<VertexSource, vcgen_dash, Markers>(vs)
+        {
+        }
+
+        void remove_all_dashes() 
+        { 
+            base_type::generator().remove_all_dashes(); 
+        }
+
+        void add_dash(double dash_len, double gap_len) 
+        { 
+            base_type::generator().add_dash(dash_len, gap_len); 
+        }
+
+        void dash_start(double ds) 
+        { 
+            base_type::generator().dash_start(ds); 
+        }
+
+        void shorten(double s) { base_type::generator().shorten(s); }
+        double shorten() const { return base_type::generator().shorten(); }
+
+    private:
+        conv_dash(const conv_dash<VertexSource, Markers>&);
+        const conv_dash<VertexSource, Markers>& 
+            operator = (const conv_dash<VertexSource, Markers>&);
+    };
+
+
+}
+
+#endif
--- a/dep/agg/include/agg_conv_gpc.h
+++ b/dep/agg/include/agg_conv_gpc.h
@@ -0,0 +1,432 @@
+//----------------------------------------------------------------------------
+// Anti-Grain Geometry - Version 2.4
+// Copyright (C) 2002-2005 Maxim Shemanarev (http://www.antigrain.com)
+//
+// Permission to copy, use, modify, sell and distribute this software 
+// is granted provided this copyright notice appears in all copies. 
+// This software is provided "as is" without express or implied
+// warranty, and with no claim as to its suitability for any purpose.
+//
+//----------------------------------------------------------------------------
+// Contact: mcseem@antigrain.com
+//          mcseemagg@yahoo.com
+//          http://www.antigrain.com
+//----------------------------------------------------------------------------
+//
+// General Polygon Clipper based on the GPC library by Alan Murta 
+// Union, Intersection, XOR, A-B, B-A
+// Contact the author if you intend to use it in commercial applications!
+// http://www.cs.man.ac.uk/aig/staff/alan/software/
+// Alan Murta (email: gpc@cs.man.ac.uk)
+//
+//----------------------------------------------------------------------------
+
+#ifndef AGG_CONV_GPC_INCLUDED
+#define AGG_CONV_GPC_INCLUDED
+
+#include <cstring>
+#include "agg_basics.h"
+#include "agg_array.h"
+
+extern "C" 
+{ 
+#include "gpc.h" 
+}
+
+namespace agg
+{
+    enum gpc_op_e
+    {
+        gpc_or,
+        gpc_and,
+        gpc_xor,
+        gpc_a_minus_b,
+        gpc_b_minus_a
+    };
+
+
+    //================================================================conv_gpc
+    template<class VSA, class VSB> class conv_gpc
+    {
+        enum status
+        {
+            status_move_to,
+            status_line_to,
+            status_stop
+        };
+
+        struct contour_header_type
+        {
+            int num_vertices;
+            int hole_flag;
+            gpc_vertex* vertices;
+        };
+
+        typedef pod_bvector<gpc_vertex, 8>          vertex_array_type;
+        typedef pod_bvector<contour_header_type, 6> contour_header_array_type;
+
+
+    public:
+        typedef VSA source_a_type;
+        typedef VSB source_b_type;
+        typedef conv_gpc<source_a_type, source_b_type> self_type;
+
+        ~conv_gpc()
+        {
+            free_gpc_data();
+        }
+
+        conv_gpc(source_a_type& a, source_b_type& b, gpc_op_e op = gpc_or) :
+            m_src_a(&a),
+            m_src_b(&b),
+            m_status(status_move_to),
+            m_vertex(-1),
+            m_contour(-1),
+            m_operation(op)
+        {
+            std::memset(&m_poly_a, 0, sizeof(m_poly_a));
+            std::memset(&m_poly_b, 0, sizeof(m_poly_b));
+            std::memset(&m_result, 0, sizeof(m_result));
+        }
+
+        void attach1(VSA& source) { m_src_a = &source; }
+        void attach2(VSB& source) { m_src_b = &source; }
+
+        void operation(gpc_op_e v) { m_operation = v; }
+
+        // Vertex Source Interface
+        void     rewind(unsigned path_id);
+        unsigned vertex(double* x, double* y);
+
+    private:
+        conv_gpc(const conv_gpc<VSA, VSB>&);
+        const conv_gpc<VSA, VSB>& operator = (const conv_gpc<VSA, VSB>&);
+
+        //--------------------------------------------------------------------
+        void free_polygon(gpc_polygon& p);
+        void free_result();
+        void free_gpc_data();
+        void start_contour();
+        void add_vertex(double x, double y);
+        void end_contour(unsigned orientation);
+        void make_polygon(gpc_polygon& p);
+        void start_extracting();
+        bool next_contour();
+        bool next_vertex(double* x, double* y);
+
+
+        //--------------------------------------------------------------------
+        template<class VS> void add(VS& src, gpc_polygon& p)
+        {
+            unsigned cmd;
+            double x, y;
+            double start_x = 0.0;
+            double start_y = 0.0;
+            bool line_to = false;
+            unsigned orientation = 0;
+
+            m_contour_accumulator.remove_all();
+
+            while(!is_stop(cmd = src.vertex(&x, &y)))
+            {
+                if(is_vertex(cmd))
+                {
+                    if(is_move_to(cmd))
+                    {
+                        if(line_to)
+                        {
+                            end_contour(orientation);
+                            orientation = 0;
+                        }
+                        start_contour();
+                        start_x = x;
+                        start_y = y;
+                    }
+                    add_vertex(x, y);
+                    line_to = true;
+                }
+                else
+                {
+                    if(is_end_poly(cmd))
+                    {
+                        orientation = get_orientation(cmd);
+                        if(line_to && is_closed(cmd))
+                        {
+                            add_vertex(start_x, start_y);
+                        }
+                    }
+                }
+            }
+            if(line_to)
+            {
+                end_contour(orientation);
+            }
+            make_polygon(p);
+        }
+
+
+    private:
+        //--------------------------------------------------------------------
+        source_a_type*             m_src_a;
+        source_b_type*             m_src_b;
+        status                     m_status;
+        int                        m_vertex;
+        int                        m_contour;
+        gpc_op_e                   m_operation;
+        vertex_array_type          m_vertex_accumulator;
+        contour_header_array_type  m_contour_accumulator;
+        gpc_polygon                m_poly_a;
+        gpc_polygon                m_poly_b;
+        gpc_polygon                m_result;
+    };
+
+
+
+
+
+    //------------------------------------------------------------------------
+    template<class VSA, class VSB> 
+    void conv_gpc<VSA, VSB>::free_polygon(gpc_polygon& p)
+    {
+        int i;
+        for(i = 0; i < p.num_contours; i++)
+        {
+            pod_allocator<gpc_vertex>::deallocate(p.contour[i].vertex, 
+                                                  p.contour[i].num_vertices);
+        }
+        pod_allocator<gpc_vertex_list>::deallocate(p.contour, p.num_contours);
+        std::memset(&p, 0, sizeof(gpc_polygon));
+    }
+
+
+    //------------------------------------------------------------------------
+    template<class VSA, class VSB> 
+    void conv_gpc<VSA, VSB>::free_result()
+    {
+        if(m_result.contour)
+        {
+            gpc_free_polygon(&m_result);
+        }
+        std::memset(&m_result, 0, sizeof(m_result));
+    }
+
+
+    //------------------------------------------------------------------------
+    template<class VSA, class VSB> 
+    void conv_gpc<VSA, VSB>::free_gpc_data()
+    {
+        free_polygon(m_poly_a);
+        free_polygon(m_poly_b);
+        free_result();
+    }
+
+
+    //------------------------------------------------------------------------
+    template<class VSA, class VSB> 
+    void conv_gpc<VSA, VSB>::start_contour()
+    {
+        contour_header_type h;
+        std::memset(&h, 0, sizeof(h));
+        m_contour_accumulator.add(h);
+        m_vertex_accumulator.remove_all();
+    }
+
+
+    //------------------------------------------------------------------------
+    template<class VSA, class VSB> 
+    inline void conv_gpc<VSA, VSB>::add_vertex(double x, double y)
+    {
+        gpc_vertex v;
+        v.x = x;
+        v.y = y;
+        m_vertex_accumulator.add(v);
+    }
+
+
+    //------------------------------------------------------------------------
+    template<class VSA, class VSB> 
+    void conv_gpc<VSA, VSB>::end_contour(unsigned /*orientation*/)
+    {
+        if(m_contour_accumulator.size())
+        {
+            if(m_vertex_accumulator.size() > 2)
+            {
+                contour_header_type& h = 
+                    m_contour_accumulator[m_contour_accumulator.size() - 1];
+
+                h.num_vertices = m_vertex_accumulator.size();
+                h.hole_flag = 0;
+
+                // TO DO: Clarify the "holes"
+                //if(is_cw(orientation)) h.hole_flag = 1;
+
+                h.vertices = pod_allocator<gpc_vertex>::allocate(h.num_vertices);
+                gpc_vertex* d = h.vertices;
+                int i;
+                for(i = 0; i < h.num_vertices; i++)
+                {
+                    const gpc_vertex& s = m_vertex_accumulator[i];
+                    d->x = s.x;
+                    d->y = s.y;
+                    ++d;
+                }
+            }
+            else
+            {
+                m_vertex_accumulator.remove_last();
+            }
+        }
+    }
+
+
+    //------------------------------------------------------------------------
+    template<class VSA, class VSB> 
+    void conv_gpc<VSA, VSB>::make_polygon(gpc_polygon& p)
+    {
+        free_polygon(p);
+        if(m_contour_accumulator.size())
+        {
+            p.num_contours = m_contour_accumulator.size();
+
+            p.hole = 0;
+            p.contour = pod_allocator<gpc_vertex_list>::allocate(p.num_contours);
+
+            int i;
+            gpc_vertex_list* pv = p.contour;
+            for(i = 0; i < p.num_contours; i++)
+            {
+                const contour_header_type& h = m_contour_accumulator[i];
+                pv->num_vertices = h.num_vertices;
+                pv->vertex = h.vertices;
+                ++pv;
+            }
+        }
+    }
+
+
+    //------------------------------------------------------------------------
+    template<class VSA, class VSB> 
+    void conv_gpc<VSA, VSB>::start_extracting()
+    {
+        m_status = status_move_to;
+        m_contour = -1;
+        m_vertex = -1;
+    }
+
+
+    //------------------------------------------------------------------------
+    template<class VSA, class VSB> 
+    bool conv_gpc<VSA, VSB>::next_contour()
+    {
+        if(++m_contour < m_result.num_contours)
+        {
+            m_vertex = -1;
+            return true;
+        }
+        return false;
+    }
+
+
+    //------------------------------------------------------------------------
+    template<class VSA, class VSB> 
+    inline bool conv_gpc<VSA, VSB>::next_vertex(double* x, double* y)
+    {
+        const gpc_vertex_list& vlist = m_result.contour[m_contour];
+        if(++m_vertex < vlist.num_vertices)
+        {
+            const gpc_vertex& v = vlist.vertex[m_vertex];
+            *x = v.x;
+            *y = v.y;
+            return true;
+        }
+        return false;
+    }
+
+
+    //------------------------------------------------------------------------
+    template<class VSA, class VSB> 
+    void conv_gpc<VSA, VSB>::rewind(unsigned path_id)
+    {
+        free_result();
+        m_src_a->rewind(path_id);
+        m_src_b->rewind(path_id);
+        add(*m_src_a, m_poly_a);
+        add(*m_src_b, m_poly_b);
+        switch(m_operation)
+        {
+           case gpc_or:
+                gpc_polygon_clip(GPC_UNION,
+                                 &m_poly_a,
+                                 &m_poly_b,
+                                 &m_result);
+               break;
+
+           case gpc_and:
+                gpc_polygon_clip(GPC_INT,
+                                 &m_poly_a,
+                                 &m_poly_b,
+                                 &m_result);
+               break;
+
+           case gpc_xor:
+                gpc_polygon_clip(GPC_XOR,
+                                 &m_poly_a,
+                                 &m_poly_b,
+                                 &m_result);
+               break;
+
+           case gpc_a_minus_b:
+                gpc_polygon_clip(GPC_DIFF,
+                                 &m_poly_a,
+                                 &m_poly_b,
+                                 &m_result);
+               break;
+
+           case gpc_b_minus_a:
+                gpc_polygon_clip(GPC_DIFF,
+                                 &m_poly_b,
+                                 &m_poly_a,
+                                 &m_result);
+               break;
+        }
+        start_extracting();
+    }
+
+
+    //------------------------------------------------------------------------
+    template<class VSA, class VSB> 
+    unsigned conv_gpc<VSA, VSB>::vertex(double* x, double* y)
+    {
+        if(m_status == status_move_to)
+        {
+            if(next_contour()) 
+            {
+                if(next_vertex(x, y))
+                {
+                    m_status = status_line_to;
+                    return path_cmd_move_to;
+                }
+                m_status = status_stop;
+                return path_cmd_end_poly | path_flags_close;
+            }
+        }
+        else
+        {
+            if(next_vertex(x, y))
+            {
+                return path_cmd_line_to;
+            }
+            else
+            {
+                m_status = status_move_to;
+            }
+            return path_cmd_end_poly | path_flags_close;
+        }
+        return path_cmd_stop;
+    }
+
+   
+}
+
+
+#endif
--- a/dep/agg/include/agg_conv_marker.h
+++ b/dep/agg/include/agg_conv_marker.h
@@ -0,0 +1,149 @@
+//----------------------------------------------------------------------------
+// Anti-Grain Geometry - Version 2.4
+// Copyright (C) 2002-2005 Maxim Shemanarev (http://www.antigrain.com)
+//
+// Permission to copy, use, modify, sell and distribute this software 
+// is granted provided this copyright notice appears in all copies. 
+// This software is provided "as is" without express or implied
+// warranty, and with no claim as to its suitability for any purpose.
+//
+//----------------------------------------------------------------------------
+// Contact: mcseem@antigrain.com
+//          mcseemagg@yahoo.com
+//          http://www.antigrain.com
+//----------------------------------------------------------------------------
+//
+// conv_marker
+//
+//----------------------------------------------------------------------------
+#ifndef AGG_CONV_MARKER_INCLUDED
+#define AGG_CONV_MARKER_INCLUDED
+
+#include <cmath>
+#include "agg_basics.h"
+#include "agg_trans_affine.h"
+
+namespace agg
+{
+    //-------------------------------------------------------------conv_marker
+    template<class MarkerLocator, class MarkerShapes>
+    class conv_marker
+    {
+    public:
+        conv_marker(MarkerLocator& ml, MarkerShapes& ms);
+
+        trans_affine& transform() { return m_transform; }
+        const trans_affine& transform() const { return m_transform; }
+
+        void rewind(unsigned path_id);
+        unsigned vertex(double* x, double* y);
+
+    private:
+        conv_marker(const conv_marker<MarkerLocator, MarkerShapes>&);
+        const conv_marker<MarkerLocator, MarkerShapes>& 
+            operator = (const conv_marker<MarkerLocator, MarkerShapes>&);
+
+        enum status_e 
+        {
+            initial,
+            markers,
+            polygon,
+            stop
+        };
+
+        MarkerLocator* m_marker_locator;
+        MarkerShapes*  m_marker_shapes;
+        trans_affine   m_transform;
+        trans_affine   m_mtx;
+        status_e       m_status;
+        unsigned       m_marker;
+        unsigned       m_num_markers;
+    };
+
+
+    //------------------------------------------------------------------------
+    template<class MarkerLocator, class MarkerShapes> 
+    conv_marker<MarkerLocator, MarkerShapes>::conv_marker(MarkerLocator& ml, MarkerShapes& ms) :
+        m_marker_locator(&ml),
+        m_marker_shapes(&ms),
+        m_status(initial),
+        m_marker(0),
+        m_num_markers(1)
+    {
+    }
+
+
+    //------------------------------------------------------------------------
+    template<class MarkerLocator, class MarkerShapes> 
+    void conv_marker<MarkerLocator, MarkerShapes>::rewind(unsigned)
+    {
+        m_status = initial;
+        m_marker = 0;
+        m_num_markers = 1;
+    }
+
+
+    //------------------------------------------------------------------------
+    template<class MarkerLocator, class MarkerShapes> 
+    unsigned conv_marker<MarkerLocator, MarkerShapes>::vertex(double* x, double* y)
+    {
+        unsigned cmd = path_cmd_move_to;
+        double x1, y1, x2, y2;
+
+        while(!is_stop(cmd))
+        {
+            switch(m_status)
+            {
+            case initial:
+                if(m_num_markers == 0)
+                {
+                   cmd = path_cmd_stop;
+                   break;
+                }
+                m_marker_locator->rewind(m_marker);
+                ++m_marker;
+                m_num_markers = 0;
+                m_status = markers;
+
+            case markers:
+                if(is_stop(m_marker_locator->vertex(&x1, &y1)))
+                {
+                    m_status = initial;
+                    break;
+                }
+                if(is_stop(m_marker_locator->vertex(&x2, &y2)))
+                {
+                    m_status = initial;
+                    break;
+                }
+                ++m_num_markers;
+                m_mtx = m_transform;
+                m_mtx *= trans_affine_rotation(std::atan2(y2 - y1, x2 - x1));
+                m_mtx *= trans_affine_translation(x1, y1);
+                m_marker_shapes->rewind(m_marker - 1);
+                m_status = polygon;
+
+            case polygon:
+                cmd = m_marker_shapes->vertex(x, y);
+                if(is_stop(cmd))
+                {
+                    cmd = path_cmd_move_to;
+                    m_status = markers;
+                    break;
+                }
+                m_mtx.transform(x, y);
+                return cmd;
+
+            case stop:
+                cmd = path_cmd_stop;
+                break;
+            }
+        }
+        return cmd;
+    }
+
+}
+
+
+#endif
+
--- a/dep/agg/include/agg_conv_marker_adaptor.h
+++ b/dep/agg/include/agg_conv_marker_adaptor.h
@@ -0,0 +1,51 @@
+//----------------------------------------------------------------------------
+// Anti-Grain Geometry - Version 2.4
+// Copyright (C) 2002-2005 Maxim Shemanarev (http://www.antigrain.com)
+//
+// Permission to copy, use, modify, sell and distribute this software 
+// is granted provided this copyright notice appears in all copies. 
+// This software is provided "as is" without express or implied
+// warranty, and with no claim as to its suitability for any purpose.
+//
+//----------------------------------------------------------------------------
+// Contact: mcseem@antigrain.com
+//          mcseemagg@yahoo.com
+//          http://www.antigrain.com
+//----------------------------------------------------------------------------
+
+#ifndef AGG_CONV_MARKER_ADAPTOR_INCLUDED
+#define AGG_CONV_MARKER_ADAPTOR_INCLUDED
+
+#include "agg_basics.h"
+#include "agg_conv_adaptor_vcgen.h"
+#include "agg_vcgen_vertex_sequence.h"
+
+namespace agg
+{
+
+    //=====================================================conv_marker_adaptor
+    template<class VertexSource, class Markers=null_markers>
+    struct conv_marker_adaptor : 
+    public conv_adaptor_vcgen<VertexSource, vcgen_vertex_sequence, Markers>
+    {
+        typedef Markers marker_type;
+        typedef conv_adaptor_vcgen<VertexSource, vcgen_vertex_sequence, Markers> base_type;
+
+        conv_marker_adaptor(VertexSource& vs) : 
+            conv_adaptor_vcgen<VertexSource, vcgen_vertex_sequence, Markers>(vs)
+        {
+        }
+
+        void shorten(double s) { base_type::generator().shorten(s); }
+        double shorten() const { return base_type::generator().shorten(); }
+
+    private:
+        conv_marker_adaptor(const conv_marker_adaptor<VertexSource, Markers>&);
+        const conv_marker_adaptor<VertexSource, Markers>& 
+            operator = (const conv_marker_adaptor<VertexSource, Markers>&);
+    };
+
+
+}
+
+#endif
--- a/dep/agg/include/agg_conv_segmentator.h
+++ b/dep/agg/include/agg_conv_segmentator.h
@@ -0,0 +1,48 @@
+//----------------------------------------------------------------------------
+// Anti-Grain Geometry - Version 2.4
+// Copyright (C) 2002-2005 Maxim Shemanarev (http://www.antigrain.com)
+//
+// Permission to copy, use, modify, sell and distribute this software 
+// is granted provided this copyright notice appears in all copies. 
+// This software is provided "as is" without express or implied
+// warranty, and with no claim as to its suitability for any purpose.
+//
+//----------------------------------------------------------------------------
+// Contact: mcseem@antigrain.com
+//          mcseemagg@yahoo.com
+//          http://www.antigrain.com
+//----------------------------------------------------------------------------
+
+#ifndef AGG_CONV_SEGMENTATOR_INCLUDED
+#define AGG_CONV_SEGMENTATOR_INCLUDED
+
+#include "agg_basics.h"
+#include "agg_conv_adaptor_vpgen.h"
+#include "agg_vpgen_segmentator.h"
+
+namespace agg
+{
+
+    //========================================================conv_segmentator
+    template<class VertexSource> 
+    struct conv_segmentator : public conv_adaptor_vpgen<VertexSource, vpgen_segmentator>
+    {
+        typedef conv_adaptor_vpgen<VertexSource, vpgen_segmentator> base_type;
+
+        conv_segmentator(VertexSource& vs) : 
+            conv_adaptor_vpgen<VertexSource, vpgen_segmentator>(vs) {}
+
+        void approximation_scale(double s) { base_type::vpgen().approximation_scale(s);        }
+        double approximation_scale() const { return base_type::vpgen().approximation_scale();  }
+
+    private:
+        conv_segmentator(const conv_segmentator<VertexSource>&);
+        const conv_segmentator<VertexSource>& 
+            operator = (const conv_segmentator<VertexSource>&);
+    };
+
+
+}
+
+#endif
+
--- a/dep/agg/include/agg_conv_shorten_path.h
+++ b/dep/agg/include/agg_conv_shorten_path.h
@@ -0,0 +1,50 @@
+//----------------------------------------------------------------------------
+// Anti-Grain Geometry - Version 2.4
+// Copyright (C) 2002-2005 Maxim Shemanarev (http://www.antigrain.com)
+//
+// Permission to copy, use, modify, sell and distribute this software 
+// is granted provided this copyright notice appears in all copies. 
+// This software is provided "as is" without express or implied
+// warranty, and with no claim as to its suitability for any purpose.
+//
+//----------------------------------------------------------------------------
+// Contact: mcseem@antigrain.com
+//          mcseemagg@yahoo.com
+//          http://www.antigrain.com
+//----------------------------------------------------------------------------
+
+#ifndef AGG_CONV_SHORTEN_PATH_INCLUDED
+#define AGG_CONV_SHORTEN_PATH_INCLUDED
+
+#include "agg_basics.h"
+#include "agg_conv_adaptor_vcgen.h"
+#include "agg_vcgen_vertex_sequence.h"
+
+namespace agg
+{
+
+    //=======================================================conv_shorten_path
+    template<class VertexSource>  class conv_shorten_path : 
+    public conv_adaptor_vcgen<VertexSource, vcgen_vertex_sequence>
+    {
+    public:
+        typedef conv_adaptor_vcgen<VertexSource, vcgen_vertex_sequence> base_type;
+
+        conv_shorten_path(VertexSource& vs) : 
+            conv_adaptor_vcgen<VertexSource, vcgen_vertex_sequence>(vs)
+        {
+        }
+
+        void shorten(double s) { base_type::generator().shorten(s); }
+        double shorten() const { return base_type::generator().shorten(); }
+
+    private:
+        conv_shorten_path(const conv_shorten_path<VertexSource>&);
+        const conv_shorten_path<VertexSource>& 
+            operator = (const conv_shorten_path<VertexSource>&);
+    };
+
+
+}
+
+#endif
--- a/dep/agg/include/agg_conv_smooth_poly1.h
+++ b/dep/agg/include/agg_conv_smooth_poly1.h
@@ -0,0 +1,80 @@
+//----------------------------------------------------------------------------
+// Anti-Grain Geometry - Version 2.4
+// Copyright (C) 2002-2005 Maxim Shemanarev (http://www.antigrain.com)
+//
+// Permission to copy, use, modify, sell and distribute this software 
+// is granted provided this copyright notice appears in all copies. 
+// This software is provided "as is" without express or implied
+// warranty, and with no claim as to its suitability for any purpose.
+//
+//----------------------------------------------------------------------------
+// Contact: mcseem@antigrain.com
+//          mcseemagg@yahoo.com
+//          http://www.antigrain.com
+//----------------------------------------------------------------------------
+//
+// Smooth polygon generator
+//
+//----------------------------------------------------------------------------
+#ifndef AGG_CONV_SMOOTH_POLY1_INCLUDED
+#define AGG_CONV_SMOOTH_POLY1_INCLUDED
+
+#include "agg_basics.h"
+#include "agg_vcgen_smooth_poly1.h"
+#include "agg_conv_adaptor_vcgen.h"
+#include "agg_conv_curve.h"
+
+
+namespace agg
+{
+
+    //-------------------------------------------------------conv_smooth_poly1
+    template<class VertexSource> 
+    struct conv_smooth_poly1 : 
+    public conv_adaptor_vcgen<VertexSource, vcgen_smooth_poly1>
+    {
+        typedef conv_adaptor_vcgen<VertexSource, vcgen_smooth_poly1> base_type;
+
+        conv_smooth_poly1(VertexSource& vs) : 
+            conv_adaptor_vcgen<VertexSource, vcgen_smooth_poly1>(vs)
+        {
+        }
+
+        void   smooth_value(double v) { base_type::generator().smooth_value(v); }
+        double smooth_value() const { return base_type::generator().smooth_value(); }
+
+    private:
+        conv_smooth_poly1(const conv_smooth_poly1<VertexSource>&);
+        const conv_smooth_poly1<VertexSource>& 
+            operator = (const conv_smooth_poly1<VertexSource>&);
+    };
+
+
+
+    //-------------------------------------------------conv_smooth_poly1_curve
+    template<class VertexSource> 
+    struct conv_smooth_poly1_curve : 
+    public conv_curve<conv_smooth_poly1<VertexSource> >
+    {
+        conv_smooth_poly1_curve(VertexSource& vs) :
+            conv_curve<conv_smooth_poly1<VertexSource> >(m_smooth),
+            m_smooth(vs)
+        {
+        }
+
+        void   smooth_value(double v) { m_smooth.generator().smooth_value(v); }
+        double smooth_value() const { return m_smooth.generator().smooth_value(); }
+
+    private:
+        conv_smooth_poly1_curve(const conv_smooth_poly1_curve<VertexSource>&);
+        const conv_smooth_poly1_curve<VertexSource>& 
+            operator = (const conv_smooth_poly1_curve<VertexSource>&);
+
+        conv_smooth_poly1<VertexSource> m_smooth;
+    };
+
+}
+
+
+#endif
+
--- a/dep/agg/include/agg_conv_stroke.h
+++ b/dep/agg/include/agg_conv_stroke.h
@@ -0,0 +1,73 @@
+//----------------------------------------------------------------------------
+// Anti-Grain Geometry - Version 2.4
+// Copyright (C) 2002-2005 Maxim Shemanarev (http://www.antigrain.com)
+//
+// Permission to copy, use, modify, sell and distribute this software 
+// is granted provided this copyright notice appears in all copies. 
+// This software is provided "as is" without express or implied
+// warranty, and with no claim as to its suitability for any purpose.
+//
+//----------------------------------------------------------------------------
+// Contact: mcseem@antigrain.com
+//          mcseemagg@yahoo.com
+//          http://www.antigrain.com
+//----------------------------------------------------------------------------
+//
+// conv_stroke
+//
+//----------------------------------------------------------------------------
+#ifndef AGG_CONV_STROKE_INCLUDED
+#define AGG_CONV_STROKE_INCLUDED
+
+#include "agg_basics.h"
+#include "agg_vcgen_stroke.h"
+#include "agg_conv_adaptor_vcgen.h"
+
+namespace agg
+{
+
+    //-------------------------------------------------------------conv_stroke
+    template<class VertexSource, class Markers=null_markers> 
+    struct conv_stroke : 
+    public conv_adaptor_vcgen<VertexSource, vcgen_stroke, Markers>
+    {
+        typedef Markers marker_type;
+        typedef conv_adaptor_vcgen<VertexSource, vcgen_stroke, Markers> base_type;
+
+        conv_stroke(VertexSource& vs) : 
+            conv_adaptor_vcgen<VertexSource, vcgen_stroke, Markers>(vs)
+        {
+        }
+
+        void line_cap(line_cap_e lc)     { base_type::generator().line_cap(lc);  }
+        void line_join(line_join_e lj)   { base_type::generator().line_join(lj); }
+        void inner_join(inner_join_e ij) { base_type::generator().inner_join(ij); }
+
+        line_cap_e   line_cap()   const { return base_type::generator().line_cap();  }
+        line_join_e  line_join()  const { return base_type::generator().line_join(); }
+        inner_join_e inner_join() const { return base_type::generator().inner_join(); }
+
+        void width(double w) { base_type::generator().width(w); }
+        void miter_limit(double ml) { base_type::generator().miter_limit(ml); }
+        void miter_limit_theta(double t) { base_type::generator().miter_limit_theta(t); }
+        void inner_miter_limit(double ml) { base_type::generator().inner_miter_limit(ml); }
+        void approximation_scale(double as) { base_type::generator().approximation_scale(as); }
+
+        double width() const { return base_type::generator().width(); }
+        double miter_limit() const { return base_type::generator().miter_limit(); }
+        double inner_miter_limit() const { return base_type::generator().inner_miter_limit(); }
+        double approximation_scale() const { return base_type::generator().approximation_scale(); }
+
+        void shorten(double s) { base_type::generator().shorten(s); }
+        double shorten() const { return base_type::generator().shorten(); }
+
+    private:
+       conv_stroke(const conv_stroke<VertexSource, Markers>&);
+       const conv_stroke<VertexSource, Markers>& 
+           operator = (const conv_stroke<VertexSource, Markers>&);
+
+    };
+
+}
+
+#endif
--- a/dep/agg/include/agg_conv_transform.h
+++ b/dep/agg/include/agg_conv_transform.h
@@ -0,0 +1,68 @@
+//----------------------------------------------------------------------------
+// Anti-Grain Geometry - Version 2.4
+// Copyright (C) 2002-2005 Maxim Shemanarev (http://www.antigrain.com)
+//
+// Permission to copy, use, modify, sell and distribute this software 
+// is granted provided this copyright notice appears in all copies. 
+// This software is provided "as is" without express or implied
+// warranty, and with no claim as to its suitability for any purpose.
+//
+//----------------------------------------------------------------------------
+// Contact: mcseem@antigrain.com
+//          mcseemagg@yahoo.com
+//          http://www.antigrain.com
+//----------------------------------------------------------------------------
+//
+// class conv_transform
+//
+//----------------------------------------------------------------------------
+#ifndef AGG_CONV_TRANSFORM_INCLUDED
+#define AGG_CONV_TRANSFORM_INCLUDED
+
+#include "agg_basics.h"
+#include "agg_trans_affine.h"
+
+namespace agg
+{
+
+    //----------------------------------------------------------conv_transform
+    template<class VertexSource, class Transformer=trans_affine> class conv_transform
+    {
+    public:
+        conv_transform(VertexSource& source, Transformer& tr) :
+            m_source(&source), m_trans(&tr) {}
+        void attach(VertexSource& source) { m_source = &source; }
+
+        void rewind(unsigned path_id) 
+        { 
+            m_source->rewind(path_id); 
+        }
+
+        unsigned vertex(double* x, double* y)
+        {
+            unsigned cmd = m_source->vertex(x, y);
+            if(is_vertex(cmd))
+            {
+                m_trans->transform(x, y);
+            }
+            return cmd;
+        }
+
+        void transformer(Transformer& tr)
+        {
+            m_trans = &tr;
+        }
+
+    private:
+        conv_transform(const conv_transform<VertexSource>&);
+        const conv_transform<VertexSource>& 
+            operator = (const conv_transform<VertexSource>&);
+
+        VertexSource*      m_source;
+        Transformer* m_trans;
+    };
+
+
+}
+
+#endif
--- a/dep/agg/include/agg_conv_unclose_polygon.h
+++ b/dep/agg/include/agg_conv_unclose_polygon.h
@@ -0,0 +1,52 @@
+//----------------------------------------------------------------------------
+// Anti-Grain Geometry - Version 2.4
+// Copyright (C) 2002-2005 Maxim Shemanarev (http://www.antigrain.com)
+//
+// Permission to copy, use, modify, sell and distribute this software 
+// is granted provided this copyright notice appears in all copies. 
+// This software is provided "as is" without express or implied
+// warranty, and with no claim as to its suitability for any purpose.
+//
+//----------------------------------------------------------------------------
+// Contact: mcseem@antigrain.com
+//          mcseemagg@yahoo.com
+//          http://www.antigrain.com
+//----------------------------------------------------------------------------
+
+#ifndef AGG_CONV_UNCLOSE_POLYGON_INCLUDED
+#define AGG_CONV_UNCLOSE_POLYGON_INCLUDED
+
+#include "agg_basics.h"
+
+namespace agg
+{
+    //====================================================conv_unclose_polygon
+    template<class VertexSource> class conv_unclose_polygon
+    {
+    public:
+        explicit conv_unclose_polygon(VertexSource& vs) : m_source(&vs) {}
+        void attach(VertexSource& source) { m_source = &source; }
+
+        void rewind(unsigned path_id)
+        {
+            m_source->rewind(path_id);
+        }
+
+        unsigned vertex(double* x, double* y)
+        {
+            unsigned cmd = m_source->vertex(x, y);
+            if(is_end_poly(cmd)) cmd &= ~path_flags_close;
+            return cmd;
+        }
+
+    private:
+        conv_unclose_polygon(const conv_unclose_polygon<VertexSource>&);
+        const conv_unclose_polygon<VertexSource>& 
+            operator = (const conv_unclose_polygon<VertexSource>&);
+
+        VertexSource* m_source;
+    };
+
+}
+
+#endif
--- a/dep/agg/include/agg_curves.h
+++ b/dep/agg/include/agg_curves.h
@@ -0,0 +1,693 @@
+//----------------------------------------------------------------------------
+// Anti-Grain Geometry - Version 2.4
+// Copyright (C) 2002-2005 Maxim Shemanarev (http://www.antigrain.com)
+// Copyright (C) 2005 Tony Juricic (tonygeek@yahoo.com)
+//
+// Permission to copy, use, modify, sell and distribute this software 
+// is granted provided this copyright notice appears in all copies. 
+// This software is provided "as is" without express or implied
+// warranty, and with no claim as to its suitability for any purpose.
+//
+//----------------------------------------------------------------------------
+// Contact: mcseem@antigrain.com
+//          mcseemagg@yahoo.com
+//          http://www.antigrain.com
+//----------------------------------------------------------------------------
+
+#ifndef AGG_CURVES_INCLUDED
+#define AGG_CURVES_INCLUDED
+
+#include "agg_array.h"
+
+namespace agg
+{
+
+    // See Implementation agg_curves.cpp
+
+    //--------------------------------------------curve_approximation_method_e
+    enum curve_approximation_method_e
+    {
+        curve_inc,
+        curve_div
+    };
+    
+    //--------------------------------------------------------------curve3_inc
+    class curve3_inc
+    {
+    public:
+        curve3_inc() :
+          m_num_steps(0), m_step(0), m_scale(1.0) { }
+
+        curve3_inc(double x1, double y1, 
+                   double x2, double y2, 
+                   double x3, double y3) :
+            m_num_steps(0), m_step(0), m_scale(1.0) 
+        { 
+            init(x1, y1, x2, y2, x3, y3);
+        }
+
+        void reset() { m_num_steps = 0; m_step = -1; }
+        void init(double x1, double y1, 
+                  double x2, double y2, 
+                  double x3, double y3);
+
+        void approximation_method(curve_approximation_method_e) {}
+        curve_approximation_method_e approximation_method() const { return curve_inc; }
+
+        void approximation_scale(double s);
+        double approximation_scale() const;
+
+        void angle_tolerance(double) {}
+        double angle_tolerance() const { return 0.0; }
+
+        void cusp_limit(double) {}
+        double cusp_limit() const { return 0.0; }
+
+        void     rewind(unsigned path_id);
+        unsigned vertex(double* x, double* y);
+
+    private:
+        int      m_num_steps;
+        int      m_step;
+        double   m_scale;
+        double   m_start_x; 
+        double   m_start_y;
+        double   m_end_x; 
+        double   m_end_y;
+        double   m_fx; 
+        double   m_fy;
+        double   m_dfx; 
+        double   m_dfy;
+        double   m_ddfx; 
+        double   m_ddfy;
+        double   m_saved_fx; 
+        double   m_saved_fy;
+        double   m_saved_dfx; 
+        double   m_saved_dfy;
+    };
+
+
+
+
+
+    //-------------------------------------------------------------curve3_div
+    class curve3_div
+    {
+    public:
+        curve3_div() : 
+            m_approximation_scale(1.0),
+            m_angle_tolerance(0.0),
+            m_count(0)
+        {}
+
+        curve3_div(double x1, double y1, 
+                   double x2, double y2, 
+                   double x3, double y3) :
+            m_approximation_scale(1.0),
+            m_angle_tolerance(0.0),
+            m_count(0)
+        { 
+            init(x1, y1, x2, y2, x3, y3);
+        }
+
+        void reset() { m_points.remove_all(); m_count = 0; }
+        void init(double x1, double y1, 
+                  double x2, double y2, 
+                  double x3, double y3);
+
+        void approximation_method(curve_approximation_method_e) {}
+        curve_approximation_method_e approximation_method() const { return curve_div; }
+
+        void approximation_scale(double s) { m_approximation_scale = s; }
+        double approximation_scale() const { return m_approximation_scale;  }
+
+        void angle_tolerance(double a) { m_angle_tolerance = a; }
+        double angle_tolerance() const { return m_angle_tolerance;  }
+
+        void cusp_limit(double) {}
+        double cusp_limit() const { return 0.0; }
+
+        void rewind(unsigned)
+        {
+            m_count = 0;
+        }
+
+        unsigned vertex(double* x, double* y)
+        {
+            if(m_count >= m_points.size()) return path_cmd_stop;
+            const point_d& p = m_points[m_count++];
+            *x = p.x;
+            *y = p.y;
+            return (m_count == 1) ? path_cmd_move_to : path_cmd_line_to;
+        }
+
+    private:
+        void bezier(double x1, double y1, 
+                    double x2, double y2, 
+                    double x3, double y3);
+        void recursive_bezier(double x1, double y1, 
+                              double x2, double y2, 
+                              double x3, double y3,
+                              unsigned level);
+
+        double               m_approximation_scale;
+        double               m_distance_tolerance_square;
+        double               m_angle_tolerance;
+        unsigned             m_count;
+        pod_bvector<point_d> m_points;
+    };
+
+
+
+
+
+
+
+    //-------------------------------------------------------------curve4_points
+    struct curve4_points
+    {
+        double cp[8];
+        curve4_points() {}
+        curve4_points(double x1, double y1,
+                      double x2, double y2,
+                      double x3, double y3,
+                      double x4, double y4)
+        {
+            cp[0] = x1; cp[1] = y1; cp[2] = x2; cp[3] = y2;
+            cp[4] = x3; cp[5] = y3; cp[6] = x4; cp[7] = y4;
+        }
+        void init(double x1, double y1,
+                  double x2, double y2,
+                  double x3, double y3,
+                  double x4, double y4)
+        {
+            cp[0] = x1; cp[1] = y1; cp[2] = x2; cp[3] = y2;
+            cp[4] = x3; cp[5] = y3; cp[6] = x4; cp[7] = y4;
+        }
+        double  operator [] (unsigned i) const { return cp[i]; }
+        double& operator [] (unsigned i)       { return cp[i]; }
+    };
+
+
+
+    //-------------------------------------------------------------curve4_inc
+    class curve4_inc
+    {
+    public:
+        curve4_inc() :
+            m_num_steps(0), m_step(0), m_scale(1.0) { }
+
+        curve4_inc(double x1, double y1, 
+                   double x2, double y2, 
+                   double x3, double y3,
+                   double x4, double y4) :
+            m_num_steps(0), m_step(0), m_scale(1.0) 
+        { 
+            init(x1, y1, x2, y2, x3, y3, x4, y4);
+        }
+
+        curve4_inc(const curve4_points& cp) :
+            m_num_steps(0), m_step(0), m_scale(1.0) 
+        { 
+            init(cp[0], cp[1], cp[2], cp[3], cp[4], cp[5], cp[6], cp[7]);
+        }
+
+        void reset() { m_num_steps = 0; m_step = -1; }
+        void init(double x1, double y1, 
+                  double x2, double y2, 
+                  double x3, double y3,
+                  double x4, double y4);
+
+        void init(const curve4_points& cp)
+        {
+            init(cp[0], cp[1], cp[2], cp[3], cp[4], cp[5], cp[6], cp[7]);
+        }
+
+        void approximation_method(curve_approximation_method_e) {}
+        curve_approximation_method_e approximation_method() const { return curve_inc; }
+
+        void approximation_scale(double s);
+        double approximation_scale() const;
+
+        void angle_tolerance(double) {}
+        double angle_tolerance() const { return 0.0; }
+
+        void cusp_limit(double) {}
+        double cusp_limit() const { return 0.0; }
+
+        void     rewind(unsigned path_id);
+        unsigned vertex(double* x, double* y);
+
+    private:
+        int      m_num_steps;
+        int      m_step;
+        double   m_scale;
+        double   m_start_x; 
+        double   m_start_y;
+        double   m_end_x; 
+        double   m_end_y;
+        double   m_fx; 
+        double   m_fy;
+        double   m_dfx; 
+        double   m_dfy;
+        double   m_ddfx; 
+        double   m_ddfy;
+        double   m_dddfx; 
+        double   m_dddfy;
+        double   m_saved_fx; 
+        double   m_saved_fy;
+        double   m_saved_dfx; 
+        double   m_saved_dfy;
+        double   m_saved_ddfx; 
+        double   m_saved_ddfy;
+    };
+
+
+
+    //-------------------------------------------------------catrom_to_bezier
+    inline curve4_points catrom_to_bezier(double x1, double y1, 
+                                          double x2, double y2, 
+                                          double x3, double y3,
+                                          double x4, double y4)
+    {
+        // Trans. matrix Catmull-Rom to Bezier
+        //
+        //  0       1       0       0
+        //  -1/6    1       1/6     0
+        //  0       1/6     1       -1/6
+        //  0       0       1       0
+        //
+        return curve4_points(
+            x2,
+            y2,
+            (-x1 + 6*x2 + x3) / 6,
+            (-y1 + 6*y2 + y3) / 6,
+            ( x2 + 6*x3 - x4) / 6,
+            ( y2 + 6*y3 - y4) / 6,
+            x3,
+            y3);
+    }
+
+
+    //-----------------------------------------------------------------------
+    inline curve4_points
+    catrom_to_bezier(const curve4_points& cp)
+    {
+        return catrom_to_bezier(cp[0], cp[1], cp[2], cp[3], 
+                                cp[4], cp[5], cp[6], cp[7]);
+    }
+
+
+
+    //-----------------------------------------------------ubspline_to_bezier
+    inline curve4_points ubspline_to_bezier(double x1, double y1, 
+                                            double x2, double y2, 
+                                            double x3, double y3,
+                                            double x4, double y4)
+    {
+        // Trans. matrix Uniform BSpline to Bezier
+        //
+        //  1/6     4/6     1/6     0
+        //  0       4/6     2/6     0
+        //  0       2/6     4/6     0
+        //  0       1/6     4/6     1/6
+        //
+        return curve4_points(
+            (x1 + 4*x2 + x3) / 6,
+            (y1 + 4*y2 + y3) / 6,
+            (4*x2 + 2*x3) / 6,
+            (4*y2 + 2*y3) / 6,
+            (2*x2 + 4*x3) / 6,
+            (2*y2 + 4*y3) / 6,
+            (x2 + 4*x3 + x4) / 6,
+            (y2 + 4*y3 + y4) / 6);
+    }
+
+
+    //-----------------------------------------------------------------------
+    inline curve4_points 
+    ubspline_to_bezier(const curve4_points& cp)
+    {
+        return ubspline_to_bezier(cp[0], cp[1], cp[2], cp[3], 
+                                  cp[4], cp[5], cp[6], cp[7]);
+    }
+
+
+
+
+    //------------------------------------------------------hermite_to_bezier
+    inline curve4_points hermite_to_bezier(double x1, double y1, 
+                                           double x2, double y2, 
+                                           double x3, double y3,
+                                           double x4, double y4)
+    {
+        // Trans. matrix Hermite to Bezier
+        //
+        //  1       0       0       0
+        //  1       0       1/3     0
+        //  0       1       0       -1/3
+        //  0       1       0       0
+        //
+        return curve4_points(
+            x1,
+            y1,
+            (3*x1 + x3) / 3,
+            (3*y1 + y3) / 3,
+            (3*x2 - x4) / 3,
+            (3*y2 - y4) / 3,
+            x2,
+            y2);
+    }
+
+
+
+    //-----------------------------------------------------------------------
+    inline curve4_points 
+    hermite_to_bezier(const curve4_points& cp)
+    {
+        return hermite_to_bezier(cp[0], cp[1], cp[2], cp[3], 
+                                 cp[4], cp[5], cp[6], cp[7]);
+    }
+
+
+    //-------------------------------------------------------------curve4_div
+    class curve4_div
+    {
+    public:
+        curve4_div() : 
+            m_approximation_scale(1.0),
+            m_angle_tolerance(0.0),
+            m_cusp_limit(0.0),
+            m_count(0)
+        {}
+
+        curve4_div(double x1, double y1, 
+                   double x2, double y2, 
+                   double x3, double y3,
+                   double x4, double y4) :
+            m_approximation_scale(1.0),
+            m_angle_tolerance(0.0),
+            m_cusp_limit(0.0),
+            m_count(0)
+        { 
+            init(x1, y1, x2, y2, x3, y3, x4, y4);
+        }
+
+        curve4_div(const curve4_points& cp) :
+            m_approximation_scale(1.0),
+            m_angle_tolerance(0.0),
+            m_count(0)
+        { 
+            init(cp[0], cp[1], cp[2], cp[3], cp[4], cp[5], cp[6], cp[7]);
+        }
+
+        void reset() { m_points.remove_all(); m_count = 0; }
+        void init(double x1, double y1, 
+                  double x2, double y2, 
+                  double x3, double y3,
+                  double x4, double y4);
+
+        void init(const curve4_points& cp)
+        {
+            init(cp[0], cp[1], cp[2], cp[3], cp[4], cp[5], cp[6], cp[7]);
+        }
+
+        void approximation_method(curve_approximation_method_e) {}
+
+        curve_approximation_method_e approximation_method() const 
+        { 
+            return curve_div; 
+        }
+
+        void approximation_scale(double s) { m_approximation_scale = s; }
+        double approximation_scale() const { return m_approximation_scale;  }
+
+        void angle_tolerance(double a) { m_angle_tolerance = a; }
+        double angle_tolerance() const { return m_angle_tolerance;  }
+
+        void cusp_limit(double v) 
+        { 
+            m_cusp_limit = (v == 0.0) ? 0.0 : pi - v; 
+        }
+
+        double cusp_limit() const 
+        { 
+            return (m_cusp_limit == 0.0) ? 0.0 : pi - m_cusp_limit; 
+        }
+
+        void rewind(unsigned)
+        {
+            m_count = 0;
+        }
+
+        unsigned vertex(double* x, double* y)
+        {
+            if(m_count >= m_points.size()) return path_cmd_stop;
+            const point_d& p = m_points[m_count++];
+            *x = p.x;
+            *y = p.y;
+            return (m_count == 1) ? path_cmd_move_to : path_cmd_line_to;
+        }
+
+    private:
+        void bezier(double x1, double y1, 
+                    double x2, double y2, 
+                    double x3, double y3, 
+                    double x4, double y4);
+
+        void recursive_bezier(double x1, double y1, 
+                              double x2, double y2, 
+                              double x3, double y3, 
+                              double x4, double y4,
+                              unsigned level);
+
+        double               m_approximation_scale;
+        double               m_distance_tolerance_square;
+        double               m_angle_tolerance;
+        double               m_cusp_limit;
+        unsigned             m_count;
+        pod_bvector<point_d> m_points;
+    };
+
+
+    //-----------------------------------------------------------------curve3
+    class curve3
+    {
+    public:
+        curve3() : m_approximation_method(curve_div) {}
+        curve3(double x1, double y1, 
+               double x2, double y2, 
+               double x3, double y3) :
+            m_approximation_method(curve_div)
+        { 
+            init(x1, y1, x2, y2, x3, y3);
+        }
+
+        void reset() 
+        { 
+            m_curve_inc.reset();
+            m_curve_div.reset();
+        }
+
+        void init(double x1, double y1, 
+                  double x2, double y2, 
+                  double x3, double y3)
+        {
+            if(m_approximation_method == curve_inc) 
+            {
+                m_curve_inc.init(x1, y1, x2, y2, x3, y3);
+            }
+            else
+            {
+                m_curve_div.init(x1, y1, x2, y2, x3, y3);
+            }
+        }
+
+        void approximation_method(curve_approximation_method_e v) 
+        { 
+            m_approximation_method = v; 
+        }
+
+        curve_approximation_method_e approximation_method() const 
+        { 
+            return m_approximation_method; 
+        }
+
+        void approximation_scale(double s) 
+        { 
+            m_curve_inc.approximation_scale(s);
+            m_curve_div.approximation_scale(s);
+        }
+
+        double approximation_scale() const 
+        { 
+            return m_curve_inc.approximation_scale(); 
+        }
+
+        void angle_tolerance(double a) 
+        { 
+            m_curve_div.angle_tolerance(a); 
+        }
+
+        double angle_tolerance() const 
+        { 
+            return m_curve_div.angle_tolerance(); 
+        }
+
+        void cusp_limit(double v) 
+        { 
+            m_curve_div.cusp_limit(v); 
+        }
+
+        double cusp_limit() const 
+        { 
+            return m_curve_div.cusp_limit();  
+        }
+
+        void rewind(unsigned path_id)
+        {
+            if(m_approximation_method == curve_inc) 
+            {
+                m_curve_inc.rewind(path_id);
+            }
+            else
+            {
+                m_curve_div.rewind(path_id);
+            }
+        }
+
+        unsigned vertex(double* x, double* y)
+        {
+            if(m_approximation_method == curve_inc) 
+            {
+                return m_curve_inc.vertex(x, y);
+            }
+            return m_curve_div.vertex(x, y);
+        }
+
+    private:
+        curve3_inc m_curve_inc;
+        curve3_div m_curve_div;
+        curve_approximation_method_e m_approximation_method;
+    };
+
+
+
+
+
+    //-----------------------------------------------------------------curve4
+    class curve4
+    {
+    public:
+        curve4() : m_approximation_method(curve_div) {}
+        curve4(double x1, double y1, 
+               double x2, double y2, 
+               double x3, double y3,
+               double x4, double y4) : 
+            m_approximation_method(curve_div)
+        { 
+            init(x1, y1, x2, y2, x3, y3, x4, y4);
+        }
+
+        curve4(const curve4_points& cp) :
+            m_approximation_method(curve_div)
+        { 
+            init(cp[0], cp[1], cp[2], cp[3], cp[4], cp[5], cp[6], cp[7]);
+        }
+
+        void reset() 
+        { 
+            m_curve_inc.reset();
+            m_curve_div.reset();
+        }
+
+        void init(double x1, double y1, 
+                  double x2, double y2, 
+                  double x3, double y3,
+                  double x4, double y4)
+        {
+            if(m_approximation_method == curve_inc) 
+            {
+                m_curve_inc.init(x1, y1, x2, y2, x3, y3, x4, y4);
+            }
+            else
+            {
+                m_curve_div.init(x1, y1, x2, y2, x3, y3, x4, y4);
+            }
+        }
+
+        void init(const curve4_points& cp)
+        {
+            init(cp[0], cp[1], cp[2], cp[3], cp[4], cp[5], cp[6], cp[7]);
+        }
+
+        void approximation_method(curve_approximation_method_e v) 
+        { 
+            m_approximation_method = v; 
+        }
+
+        curve_approximation_method_e approximation_method() const 
+        { 
+            return m_approximation_method; 
+        }
+
+        void approximation_scale(double s) 
+        { 
+            m_curve_inc.approximation_scale(s);
+            m_curve_div.approximation_scale(s);
+        }
+        double approximation_scale() const { return m_curve_inc.approximation_scale(); }
+
+        void angle_tolerance(double v) 
+        { 
+            m_curve_div.angle_tolerance(v); 
+        }
+
+        double angle_tolerance() const 
+        { 
+            return m_curve_div.angle_tolerance();  
+        }
+
+        void cusp_limit(double v) 
+        { 
+            m_curve_div.cusp_limit(v); 
+        }
+
+        double cusp_limit() const 
+        { 
+            return m_curve_div.cusp_limit();  
+        }
+
+        void rewind(unsigned path_id)
+        {
+            if(m_approximation_method == curve_inc) 
+            {
+                m_curve_inc.rewind(path_id);
+            }
+            else
+            {
+                m_curve_div.rewind(path_id);
+            }
+        }
+
+        unsigned vertex(double* x, double* y)
+        {
+            if(m_approximation_method == curve_inc) 
+            {
+                return m_curve_inc.vertex(x, y);
+            }
+            return m_curve_div.vertex(x, y);
+        }
+
+    private:
+        curve4_inc m_curve_inc;
+        curve4_div m_curve_div;
+        curve_approximation_method_e m_approximation_method;
+    };
+
+
+
+
+}
+
+#endif
--- a/dep/agg/include/agg_dda_line.h
+++ b/dep/agg/include/agg_dda_line.h
@@ -0,0 +1,290 @@
+//----------------------------------------------------------------------------
+// Anti-Grain Geometry - Version 2.4
+// Copyright (C) 2002-2005 Maxim Shemanarev (http://www.antigrain.com)
+//
+// Permission to copy, use, modify, sell and distribute this software 
+// is granted provided this copyright notice appears in all copies. 
+// This software is provided "as is" without express or implied
+// warranty, and with no claim as to its suitability for any purpose.
+//
+//----------------------------------------------------------------------------
+// Contact: mcseem@antigrain.com
+//          mcseemagg@yahoo.com
+//          http://www.antigrain.com
+//----------------------------------------------------------------------------
+//
+// classes dda_line_interpolator, dda2_line_interpolator
+//
+//----------------------------------------------------------------------------
+
+#ifndef AGG_DDA_LINE_INCLUDED
+#define AGG_DDA_LINE_INCLUDED
+
+#include <cstdlib>
+#include "agg_basics.h"
+
+namespace agg
+{
+
+    //===================================================dda_line_interpolator
+    template<int FractionShift, int YShift=0> class dda_line_interpolator
+    {
+    public:
+        //--------------------------------------------------------------------
+        dda_line_interpolator() {}
+
+        //--------------------------------------------------------------------
+        dda_line_interpolator(int y1, int y2, unsigned count) :
+            m_y(y1),
+            m_inc(((y2 - y1) << FractionShift) / int(count)),
+            m_dy(0)
+        {
+        }
+
+        //--------------------------------------------------------------------
+        void operator ++ ()
+        {
+            m_dy += m_inc;
+        }
+
+        //--------------------------------------------------------------------
+        void operator -- ()
+        {
+            m_dy -= m_inc;
+        }
+
+        //--------------------------------------------------------------------
+        void operator += (unsigned n)
+        {
+            m_dy += m_inc * n;
+        }
+
+        //--------------------------------------------------------------------
+        void operator -= (unsigned n)
+        {
+            m_dy -= m_inc * n;
+        }
+
+
+        //--------------------------------------------------------------------
+        int y()  const { return m_y + (m_dy >> (FractionShift-YShift)); }
+        int dy() const { return m_dy; }
+
+
+    private:
+        int m_y;
+        int m_inc;
+        int m_dy;
+    };
+
+
+
+
+
+    //=================================================dda2_line_interpolator
+    class dda2_line_interpolator
+    {
+    public:
+        typedef int save_data_type;
+        enum save_size_e { save_size = 2 };
+
+        //--------------------------------------------------------------------
+        dda2_line_interpolator() {}
+
+        //-------------------------------------------- Forward-adjusted line
+        dda2_line_interpolator(int y1, int y2, int count) :
+            m_cnt(count <= 0 ? 1 : count),
+            m_lft((y2 - y1) / m_cnt),
+            m_rem((y2 - y1) % m_cnt),
+            m_mod(m_rem),
+            m_y(y1)
+        {
+            if(m_mod <= 0)
+            {
+                m_mod += count;
+                m_rem += count;
+                m_lft--;
+            }
+            m_mod -= count;
+        }
+
+        //-------------------------------------------- Backward-adjusted line
+        dda2_line_interpolator(int y1, int y2, int count, int) :
+            m_cnt(count <= 0 ? 1 : count),
+            m_lft((y2 - y1) / m_cnt),
+            m_rem((y2 - y1) % m_cnt),
+            m_mod(m_rem),
+            m_y(y1)
+        {
+            if(m_mod <= 0)
+            {
+                m_mod += count;
+                m_rem += count;
+                m_lft--;
+            }
+        }
+
+        //-------------------------------------------- Backward-adjusted line
+        dda2_line_interpolator(int y, int count) :
+            m_cnt(count <= 0 ? 1 : count),
+            m_lft(y / m_cnt),
+            m_rem(y % m_cnt),
+            m_mod(m_rem),
+            m_y(0)
+        {
+            if(m_mod <= 0)
+            {
+                m_mod += count;
+                m_rem += count;
+                m_lft--;
+            }
+        }
+
+
+        //--------------------------------------------------------------------
+        void save(save_data_type* data) const
+        {
+            data[0] = m_mod;
+            data[1] = m_y;
+        }
+
+        //--------------------------------------------------------------------
+        void load(const save_data_type* data)
+        {
+            m_mod = data[0];
+            m_y   = data[1];
+        }
+
+        //--------------------------------------------------------------------
+        void operator++()
+        {
+            m_mod += m_rem;
+            m_y += m_lft;
+            if(m_mod > 0)
+            {
+                m_mod -= m_cnt;
+                m_y++;
+            }
+        }
+
+        //--------------------------------------------------------------------
+        void operator--()
+        {
+            if(m_mod <= m_rem)
+            {
+                m_mod += m_cnt;
+                m_y--;
+            }
+            m_mod -= m_rem;
+            m_y -= m_lft;
+        }
+
+        //--------------------------------------------------------------------
+        void adjust_forward()
+        {
+            m_mod -= m_cnt;
+        }
+
+        //--------------------------------------------------------------------
+        void adjust_backward()
+        {
+            m_mod += m_cnt;
+        }
+
+        //--------------------------------------------------------------------
+        int mod() const { return m_mod; }
+        int rem() const { return m_rem; }
+        int lft() const { return m_lft; }
+
+        //--------------------------------------------------------------------
+        int y() const { return m_y; }
+
+    private:
+        int m_cnt;
+        int m_lft;
+        int m_rem;
+        int m_mod;
+        int m_y;
+    };
+
+
+
+
+
+
+
+    //---------------------------------------------line_bresenham_interpolator
+    class line_bresenham_interpolator
+    {
+    public:
+        enum subpixel_scale_e
+        {
+            subpixel_shift = 8,
+            subpixel_scale = 1 << subpixel_shift,
+            subpixel_mask  = subpixel_scale - 1
+        };
+
+        //--------------------------------------------------------------------
+        static int line_lr(int v) { return v >> subpixel_shift; }
+
+        //--------------------------------------------------------------------
+        line_bresenham_interpolator(int x1, int y1, int x2, int y2) :
+            m_x1_lr(line_lr(x1)),
+            m_y1_lr(line_lr(y1)),
+            m_x2_lr(line_lr(x2)),
+            m_y2_lr(line_lr(y2)),
+            m_ver(std::abs(m_x2_lr - m_x1_lr) < std::abs(m_y2_lr - m_y1_lr)),
+            m_len(m_ver ? std::abs(m_y2_lr - m_y1_lr) : 
+                          std::abs(m_x2_lr - m_x1_lr)),
+            m_inc(m_ver ? ((y2 > y1) ? 1 : -1) : ((x2 > x1) ? 1 : -1)),
+            m_interpolator(m_ver ? x1 : y1, 
+                           m_ver ? x2 : y2, 
+                           m_len)
+        {
+        }
+    
+        //--------------------------------------------------------------------
+        bool     is_ver() const { return m_ver; }
+        unsigned len()    const { return m_len; }
+        int      inc()    const { return m_inc; }
+
+        //--------------------------------------------------------------------
+        void hstep()
+        {
+            ++m_interpolator;
+            m_x1_lr += m_inc;
+        }
+
+        //--------------------------------------------------------------------
+        void vstep()
+        {
+            ++m_interpolator;
+            m_y1_lr += m_inc;
+        }
+
+        //--------------------------------------------------------------------
+        int x1() const { return m_x1_lr; }
+        int y1() const { return m_y1_lr; }
+        int x2() const { return line_lr(m_interpolator.y()); }
+        int y2() const { return line_lr(m_interpolator.y()); }
+        int x2_hr() const { return m_interpolator.y(); }
+        int y2_hr() const { return m_interpolator.y(); }
+
+    private:
+        int                    m_x1_lr;
+        int                    m_y1_lr;
+        int                    m_x2_lr;
+        int                    m_y2_lr;
+        bool                   m_ver;
+        unsigned               m_len;
+        int                    m_inc;
+        dda2_line_interpolator m_interpolator;
+
+    };
+
+
+}
+
+
+
+#endif
--- a/dep/agg/include/agg_ellipse.h
+++ b/dep/agg/include/agg_ellipse.h
@@ -0,0 +1,123 @@
+//----------------------------------------------------------------------------
+// Anti-Grain Geometry - Version 2.4
+// Copyright (C) 2002-2005 Maxim Shemanarev (http://www.antigrain.com)
+//
+// Permission to copy, use, modify, sell and distribute this software 
+// is granted provided this copyright notice appears in all copies. 
+// This software is provided "as is" without express or implied
+// warranty, and with no claim as to its suitability for any purpose.
+//
+//----------------------------------------------------------------------------
+// Contact: mcseem@antigrain.com
+//          mcseemagg@yahoo.com
+//          http://www.antigrain.com
+//----------------------------------------------------------------------------
+//
+// class ellipse
+//
+//----------------------------------------------------------------------------
+
+#ifndef AGG_ELLIPSE_INCLUDED
+#define AGG_ELLIPSE_INCLUDED
+
+#include "agg_basics.h"
+#include <cmath>
+
+namespace agg
+{
+
+    //----------------------------------------------------------------ellipse
+    class ellipse
+    {
+    public:
+        ellipse() : 
+            m_x(0.0), m_y(0.0), m_rx(1.0), m_ry(1.0), m_scale(1.0), 
+            m_num(4), m_step(0), m_cw(false) {}
+
+        ellipse(double x, double y, double rx, double ry, 
+                unsigned num_steps=0, bool cw=false) :
+            m_x(x), m_y(y), m_rx(rx), m_ry(ry), m_scale(1.0), 
+            m_num(num_steps), m_step(0), m_cw(cw) 
+        {
+            if(m_num == 0) calc_num_steps();
+        }
+
+        void init(double x, double y, double rx, double ry, 
+                  unsigned num_steps=0, bool cw=false);
+
+        void approximation_scale(double scale);
+        void rewind(unsigned path_id);
+        unsigned vertex(double* x, double* y);
+
+    private:
+        void calc_num_steps();
+
+        double m_x;
+        double m_y;
+        double m_rx;
+        double m_ry;
+        double m_scale;
+        unsigned m_num;
+        unsigned m_step;
+        bool m_cw;
+    };
+
+    //------------------------------------------------------------------------
+    inline void ellipse::init(double x, double y, double rx, double ry, 
+                              unsigned num_steps, bool cw)
+    {
+        m_x = x;
+        m_y = y;
+        m_rx = rx;
+        m_ry = ry;
+        m_num = num_steps;
+        m_step = 0;
+        m_cw = cw;
+        if(m_num == 0) calc_num_steps();
+    }
+
+    //------------------------------------------------------------------------
+    inline void ellipse::approximation_scale(double scale)
+    {   
+        m_scale = scale;
+        calc_num_steps();
+    }
+
+    //------------------------------------------------------------------------
+    inline void ellipse::calc_num_steps()
+    {
+        double ra = (std::fabs(m_rx) + std::fabs(m_ry)) / 2;
+        double da = std::acos(ra / (ra + 0.125 / m_scale)) * 2;
+        m_num = uround(2*pi / da);
+    }
+
+    //------------------------------------------------------------------------
+    inline void ellipse::rewind(unsigned)
+    {
+        m_step = 0;
+    }
+
+    //------------------------------------------------------------------------
+    inline unsigned ellipse::vertex(double* x, double* y)
+    {
+        if(m_step == m_num) 
+        {
+            ++m_step;
+            return path_cmd_end_poly | path_flags_close | path_flags_ccw;
+        }
+        if(m_step > m_num) return path_cmd_stop;
+        double angle = double(m_step) / double(m_num) * 2.0 * pi;
+        if(m_cw) angle = 2.0 * pi - angle;
+        *x = m_x + std::cos(angle) * m_rx;
+        *y = m_y + std::sin(angle) * m_ry;
+        m_step++;
+        return ((m_step == 1) ? path_cmd_move_to : path_cmd_line_to);
+    }
+
+}
+
+
+
+#endif
+
+
--- a/dep/agg/include/agg_ellipse_bresenham.h
+++ b/dep/agg/include/agg_ellipse_bresenham.h
@@ -0,0 +1,113 @@
+//----------------------------------------------------------------------------
+// Anti-Grain Geometry - Version 2.4
+// Copyright (C) 2002-2005 Maxim Shemanarev (http://www.antigrain.com)
+//
+// Permission to copy, use, modify, sell and distribute this software 
+// is granted provided this copyright notice appears in all copies. 
+// This software is provided "as is" without express or implied
+// warranty, and with no claim as to its suitability for any purpose.
+//
+//----------------------------------------------------------------------------
+// Contact: mcseem@antigrain.com
+//          mcseemagg@yahoo.com
+//          http://www.antigrain.com
+//----------------------------------------------------------------------------
+//
+// Simple Bresenham interpolator for ellipsees
+//
+//----------------------------------------------------------------------------
+
+#ifndef AGG_ELLIPSE_BRESENHAM_INCLUDED
+#define AGG_ELLIPSE_BRESENHAM_INCLUDED
+
+
+#include "agg_basics.h"
+
+
+namespace agg
+{
+
+    //------------------------------------------ellipse_bresenham_interpolator
+    class ellipse_bresenham_interpolator
+    {
+    public:
+        ellipse_bresenham_interpolator(int rx, int ry) :
+            m_rx2(rx * rx),
+            m_ry2(ry * ry),
+            m_two_rx2(m_rx2 << 1),
+            m_two_ry2(m_ry2 << 1),
+            m_dx(0),
+            m_dy(0),
+            m_inc_x(0),
+            m_inc_y(-ry * m_two_rx2),
+            m_cur_f(0)
+        {}
+        
+        int dx() const { return m_dx; }
+        int dy() const { return m_dy; }
+
+        void operator++ ()
+        {
+            int  mx, my, mxy, min_m;
+            int  fx, fy, fxy;
+
+            mx = fx = m_cur_f + m_inc_x + m_ry2;
+            if(mx < 0) mx = -mx;
+
+            my = fy = m_cur_f + m_inc_y + m_rx2;
+            if(my < 0) my = -my;
+
+            mxy = fxy = m_cur_f + m_inc_x + m_ry2 + m_inc_y + m_rx2;
+            if(mxy < 0) mxy = -mxy;
+
+            min_m = mx; 
+            bool flag = true;
+
+            if(min_m > my)  
+            { 
+                min_m = my; 
+                flag = false; 
+            }
+
+            m_dx = m_dy = 0;
+
+            if(min_m > mxy) 
+            { 
+                m_inc_x += m_two_ry2;
+                m_inc_y += m_two_rx2;
+                m_cur_f = fxy;
+                m_dx = 1; 
+                m_dy = 1;
+                return;
+            }
+
+            if(flag) 
+            {
+                m_inc_x += m_two_ry2;
+                m_cur_f = fx;
+                m_dx = 1;
+                return;
+            }
+
+            m_inc_y += m_two_rx2;
+            m_cur_f = fy;
+            m_dy = 1;
+        }
+
+    private:
+        int m_rx2;
+        int m_ry2;
+        int m_two_rx2;
+        int m_two_ry2;
+        int m_dx;
+        int m_dy;
+        int m_inc_x;
+        int m_inc_y;
+        int m_cur_f;
+
+    };
+
+}
+
+#endif
+
--- a/dep/agg/include/agg_embedded_raster_fonts.h
+++ b/dep/agg/include/agg_embedded_raster_fonts.h
@@ -0,0 +1,59 @@
+//----------------------------------------------------------------------------
+// Anti-Grain Geometry - Version 2.4
+// Copyright (C) 2002-2005 Maxim Shemanarev (http://www.antigrain.com)
+//
+// Permission to copy, use, modify, sell and distribute this software 
+// is granted provided this copyright notice appears in all copies. 
+// This software is provided "as is" without express or implied
+// warranty, and with no claim as to its suitability for any purpose.
+//
+//----------------------------------------------------------------------------
+// Contact: mcseem@antigrain.com
+//          mcseemagg@yahoo.com
+//          http://www.antigrain.com
+//----------------------------------------------------------------------------
+
+#ifndef AGG_EMBEDDED_RASTER_FONTS_INCLUDED
+#define AGG_EMBEDDED_RASTER_FONTS_INCLUDED
+
+#include "agg_basics.h"
+
+namespace agg
+{
+    extern const int8u gse4x6[];
+    extern const int8u gse4x8[];
+    extern const int8u gse5x7[];
+    extern const int8u gse5x9[];
+    extern const int8u gse6x12[];
+    extern const int8u gse6x9[];
+    extern const int8u gse7x11[];
+    extern const int8u gse7x11_bold[];
+    extern const int8u gse7x15[];
+    extern const int8u gse7x15_bold[];
+    extern const int8u gse8x16[];
+    extern const int8u gse8x16_bold[];
+    extern const int8u mcs11_prop[];
+    extern const int8u mcs11_prop_condensed[];
+    extern const int8u mcs12_prop[];
+    extern const int8u mcs13_prop[];
+    extern const int8u mcs5x10_mono[];
+    extern const int8u mcs5x11_mono[];
+    extern const int8u mcs6x10_mono[];
+    extern const int8u mcs6x11_mono[];
+    extern const int8u mcs7x12_mono_high[];
+    extern const int8u mcs7x12_mono_low[];
+    extern const int8u verdana12[];
+    extern const int8u verdana12_bold[];
+    extern const int8u verdana13[];
+    extern const int8u verdana13_bold[];
+    extern const int8u verdana14[];
+    extern const int8u verdana14_bold[];
+    extern const int8u verdana16[];
+    extern const int8u verdana16_bold[];
+    extern const int8u verdana17[];
+    extern const int8u verdana17_bold[];
+    extern const int8u verdana18[];
+    extern const int8u verdana18_bold[];
+}
+
+#endif
--- a/dep/agg/include/agg_font_cache_manager.h
+++ b/dep/agg/include/agg_font_cache_manager.h
@@ -0,0 +1,409 @@
+//----------------------------------------------------------------------------
+// Anti-Grain Geometry - Version 2.4
+// Copyright (C) 2002-2005 Maxim Shemanarev (http://www.antigrain.com)
+//
+// Permission to copy, use, modify, sell and distribute this software 
+// is granted provided this copyright notice appears in all copies. 
+// This software is provided "as is" without express or implied
+// warranty, and with no claim as to its suitability for any purpose.
+//
+//----------------------------------------------------------------------------
+// Contact: mcseem@antigrain.com
+//          mcseemagg@yahoo.com
+//          http://www.antigrain.com
+//----------------------------------------------------------------------------
+
+#ifndef AGG_FONT_CACHE_MANAGER_INCLUDED
+#define AGG_FONT_CACHE_MANAGER_INCLUDED
+
+#include <cstring>
+#include "agg_array.h"
+
+namespace agg
+{
+
+    //---------------------------------------------------------glyph_data_type
+    enum glyph_data_type
+    {
+        glyph_data_invalid = 0,
+        glyph_data_mono    = 1,
+        glyph_data_gray8   = 2,
+        glyph_data_outline = 3
+    };
+
+
+    //-------------------------------------------------------------glyph_cache
+    struct glyph_cache
+    {
+        unsigned        glyph_index;
+        int8u*          data;
+        unsigned        data_size;
+        glyph_data_type data_type;
+        rect_i          bounds;
+        double          advance_x;
+        double          advance_y;
+    };
+
+
+    //--------------------------------------------------------------font_cache
+    class font_cache
+    {
+    public:
+        enum block_size_e { block_size = 16384-16 };
+
+        //--------------------------------------------------------------------
+        font_cache() : 
+            m_allocator(block_size),
+            m_font_signature(0)
+        {}
+
+        //--------------------------------------------------------------------
+        void signature(const char* font_signature)
+        {
+            m_font_signature = (char*)m_allocator.allocate(std::strlen(font_signature) + 1);
+            std::strcpy(m_font_signature, font_signature);
+            std::memset(m_glyphs, 0, sizeof(m_glyphs));
+        }
+
+        //--------------------------------------------------------------------
+        bool font_is(const char* font_signature) const
+        {
+            return std::strcmp(font_signature, m_font_signature) == 0;
+        }
+
+        //--------------------------------------------------------------------
+        const glyph_cache* find_glyph(unsigned glyph_code) const
+        {
+            unsigned msb = (glyph_code >> 8) & 0xFF;
+            if(m_glyphs[msb]) 
+            {
+                return m_glyphs[msb][glyph_code & 0xFF];
+            }
+            return 0;
+        }
+
+        //--------------------------------------------------------------------
+        glyph_cache* cache_glyph(unsigned        glyph_code, 
+                                 unsigned        glyph_index,
+                                 unsigned        data_size,
+                                 glyph_data_type data_type,
+                                 const rect_i&   bounds,
+                                 double          advance_x,
+                                 double          advance_y)
+        {
+            unsigned msb = (glyph_code >> 8) & 0xFF;
+            if(m_glyphs[msb] == 0)
+            {
+                m_glyphs[msb] = 
+                    (glyph_cache**)m_allocator.allocate(sizeof(glyph_cache*) * 256, 
+                                                        sizeof(glyph_cache*));
+                std::memset(m_glyphs[msb], 0, sizeof(glyph_cache*) * 256);
+            }
+
+            unsigned lsb = glyph_code & 0xFF;
+            if(m_glyphs[msb][lsb]) return 0; // Already exists, do not overwrite
+
+            glyph_cache* glyph = 
+                (glyph_cache*)m_allocator.allocate(sizeof(glyph_cache),
+                                                   sizeof(double));
+
+            glyph->glyph_index        = glyph_index;
+            glyph->data               = m_allocator.allocate(data_size);
+            glyph->data_size          = data_size;
+            glyph->data_type          = data_type;
+            glyph->bounds             = bounds;
+            glyph->advance_x          = advance_x;
+            glyph->advance_y          = advance_y;
+            return m_glyphs[msb][lsb] = glyph;
+        }
+
+    private:
+        block_allocator m_allocator;
+        glyph_cache**   m_glyphs[256];
+        char*           m_font_signature;
+    };
+
+
+
+
+
+
+    
+    //---------------------------------------------------------font_cache_pool
+    class font_cache_pool
+    {
+    public:
+        //--------------------------------------------------------------------
+        ~font_cache_pool()
+        {
+            unsigned i;
+            for(i = 0; i < m_num_fonts; ++i)
+            {
+                obj_allocator<font_cache>::deallocate(m_fonts[i]);
+            }
+            pod_allocator<font_cache*>::deallocate(m_fonts, m_max_fonts);
+        }
+
+        //--------------------------------------------------------------------
+        font_cache_pool(unsigned max_fonts=32) : 
+            m_fonts(pod_allocator<font_cache*>::allocate(max_fonts)),
+            m_max_fonts(max_fonts),
+            m_num_fonts(0),
+            m_cur_font(0)
+        {}
+
+
+        //--------------------------------------------------------------------
+        void font(const char* font_signature, bool reset_cache = false)
+        {
+            int idx = find_font(font_signature);
+            if(idx >= 0)
+            {
+                if(reset_cache)
+                {
+                    obj_allocator<font_cache>::deallocate(m_fonts[idx]);
+                    m_fonts[idx] = obj_allocator<font_cache>::allocate();
+                    m_fonts[idx]->signature(font_signature);
+                }
+                m_cur_font = m_fonts[idx];
+            }
+            else
+            {
+                if(m_num_fonts >= m_max_fonts)
+                {
+                    obj_allocator<font_cache>::deallocate(m_fonts[0]);
+                    std::memcpy(m_fonts, 
+                           m_fonts + 1, 
+                           (m_max_fonts - 1) * sizeof(font_cache*));
+                    m_num_fonts = m_max_fonts - 1;
+                }
+                m_fonts[m_num_fonts] = obj_allocator<font_cache>::allocate();
+                m_fonts[m_num_fonts]->signature(font_signature);
+                m_cur_font = m_fonts[m_num_fonts];
+                ++m_num_fonts;
+            }
+        }
+
+        //--------------------------------------------------------------------
+        const font_cache* font() const
+        {
+            return m_cur_font;
+        }
+
+        //--------------------------------------------------------------------
+        const glyph_cache* find_glyph(unsigned glyph_code) const
+        {
+            if(m_cur_font) return m_cur_font->find_glyph(glyph_code);
+            return 0;
+        }
+
+        //--------------------------------------------------------------------
+        glyph_cache* cache_glyph(unsigned        glyph_code, 
+                                 unsigned        glyph_index,
+                                 unsigned        data_size,
+                                 glyph_data_type data_type,
+                                 const rect_i&   bounds,
+                                 double          advance_x,
+                                 double          advance_y)
+        {
+            if(m_cur_font) 
+            {
+                return m_cur_font->cache_glyph(glyph_code,
+                                               glyph_index,
+                                               data_size,
+                                               data_type,
+                                               bounds,
+                                               advance_x,
+                                               advance_y);
+            }
+            return 0;
+        }
+
+
+        //--------------------------------------------------------------------
+        int find_font(const char* font_signature)
+        {
+            unsigned i;
+            for(i = 0; i < m_num_fonts; i++)
+            {
+                if(m_fonts[i]->font_is(font_signature)) return int(i);
+            }
+            return -1;
+        }
+
+    private:
+        font_cache** m_fonts;
+        unsigned     m_max_fonts;
+        unsigned     m_num_fonts;
+        font_cache*  m_cur_font;
+    };
+
+
+
+
+    //------------------------------------------------------------------------
+    enum glyph_rendering
+    {
+        glyph_ren_native_mono,
+        glyph_ren_native_gray8,
+        glyph_ren_outline,
+        glyph_ren_agg_mono,
+        glyph_ren_agg_gray8
+    };
+
+
+
+
+    //------------------------------------------------------font_cache_manager
+    template<class FontEngine> class font_cache_manager
+    {
+    public:
+        typedef FontEngine font_engine_type;
+        typedef font_cache_manager<FontEngine> self_type;
+        typedef typename font_engine_type::path_adaptor_type   path_adaptor_type;
+        typedef typename font_engine_type::gray8_adaptor_type  gray8_adaptor_type;
+        typedef typename gray8_adaptor_type::embedded_scanline gray8_scanline_type;
+        typedef typename font_engine_type::mono_adaptor_type   mono_adaptor_type;
+        typedef typename mono_adaptor_type::embedded_scanline  mono_scanline_type;
+
+        //--------------------------------------------------------------------
+        font_cache_manager(font_engine_type& engine, unsigned max_fonts=32) :
+            m_fonts(max_fonts),
+            m_engine(engine),
+            m_change_stamp(-1),
+            m_prev_glyph(0),
+            m_last_glyph(0)
+        {}
+
+        //--------------------------------------------------------------------
+        void reset_last_glyph()
+        {
+            m_prev_glyph = m_last_glyph = 0;
+        }
+
+        //--------------------------------------------------------------------
+        const glyph_cache* glyph(unsigned glyph_code)
+        {
+            synchronize();
+            const glyph_cache* gl = m_fonts.find_glyph(glyph_code);
+            if(gl) 
+            {
+                m_prev_glyph = m_last_glyph;
+                return m_last_glyph = gl;
+            }
+            else
+            {
+                if(m_engine.prepare_glyph(glyph_code))
+                {
+                    m_prev_glyph = m_last_glyph;
+                    m_last_glyph = m_fonts.cache_glyph(glyph_code, 
+                                                       m_engine.glyph_index(),
+                                                       m_engine.data_size(),
+                                                       m_engine.data_type(),
+                                                       m_engine.bounds(),
+                                                       m_engine.advance_x(),
+                                                       m_engine.advance_y());
+                    m_engine.write_glyph_to(m_last_glyph->data);
+                    return m_last_glyph;
+                }
+            }
+            return 0;
+        }
+
+        //--------------------------------------------------------------------
+        void init_embedded_adaptors(const glyph_cache* gl, 
+                                    double x, double y, 
+                                    double scale=1.0)
+        {
+            if(gl)
+            {
+                switch(gl->data_type)
+                {
+                default: return;
+                case glyph_data_mono:
+                    m_mono_adaptor.init(gl->data, gl->data_size, x, y);
+                    break;
+
+                case glyph_data_gray8:
+                    m_gray8_adaptor.init(gl->data, gl->data_size, x, y);
+                    break;
+
+                case glyph_data_outline:
+                    m_path_adaptor.init(gl->data, gl->data_size, x, y, scale);
+                    break;
+                }
+            }
+        }
+
+
+        //--------------------------------------------------------------------
+        path_adaptor_type&   path_adaptor()   { return m_path_adaptor;   }
+        gray8_adaptor_type&  gray8_adaptor()  { return m_gray8_adaptor;  }
+        gray8_scanline_type& gray8_scanline() { return m_gray8_scanline; }
+        mono_adaptor_type&   mono_adaptor()   { return m_mono_adaptor;   }
+        mono_scanline_type&  mono_scanline()  { return m_mono_scanline;  }
+
+        //--------------------------------------------------------------------
+        const glyph_cache* perv_glyph() const { return m_prev_glyph; }
+        const glyph_cache* last_glyph() const { return m_last_glyph; }
+
+        //--------------------------------------------------------------------
+        bool add_kerning(double* x, double* y)
+        {
+            if(m_prev_glyph && m_last_glyph)
+            {
+                return m_engine.add_kerning(m_prev_glyph->glyph_index, 
+                                            m_last_glyph->glyph_index,
+                                            x, y);
+            }
+            return false;
+        }
+
+        //--------------------------------------------------------------------
+        void precache(unsigned from, unsigned to)
+        {
+            for(; from <= to; ++from) glyph(from);
+        }
+
+        //--------------------------------------------------------------------
+        void reset_cache()
+        {
+            m_fonts.font(m_engine.font_signature(), true);
+            m_change_stamp = m_engine.change_stamp();
+            m_prev_glyph = m_last_glyph = 0;
+        }
+
+    private:
+        //--------------------------------------------------------------------
+        font_cache_manager(const self_type&);
+        const self_type& operator = (const self_type&);
+
+        //--------------------------------------------------------------------
+        void synchronize()
+        {
+            if(m_change_stamp != m_engine.change_stamp())
+            {
+                m_fonts.font(m_engine.font_signature());
+                m_change_stamp = m_engine.change_stamp();
+                m_prev_glyph = m_last_glyph = 0;
+            }
+        }
+
+        font_cache_pool     m_fonts;
+        font_engine_type&   m_engine;
+        int                 m_change_stamp;
+        double              m_dx;
+        double              m_dy;
+        const glyph_cache*  m_prev_glyph;
+        const glyph_cache*  m_last_glyph;
+        path_adaptor_type   m_path_adaptor;
+        gray8_adaptor_type  m_gray8_adaptor;
+        gray8_scanline_type m_gray8_scanline;
+        mono_adaptor_type   m_mono_adaptor;
+        mono_scanline_type  m_mono_scanline;
+    };
+
+}
+
+#endif
+
--- a/dep/agg/include/agg_font_cache_manager2.h
+++ b/dep/agg/include/agg_font_cache_manager2.h
@@ -0,0 +1,311 @@
+//----------------------------------------------------------------------------
+// Anti-Grain Geometry - Version 2.4
+// Copyright (C) 2002-2005 Maxim Shemanarev (http://www.antigrain.com)
+//
+// Permission to copy, use, modify, sell and distribute this software
+// is granted provided this copyright notice appears in all copies.
+// This software is provided "as is" without express or implied
+// warranty, and with no claim as to its suitability for any purpose.
+//
+//----------------------------------------------------------------------------
+// Contact: mcseem@antigrain.com
+//          mcseemagg@yahoo.com
+//          http://www.antigrain.com
+//----------------------------------------------------------------------------
+
+#ifndef AGG_FONT_CACHE_MANAGER2_INCLUDED
+#define AGG_FONT_CACHE_MANAGER2_INCLUDED
+
+#include <cassert>
+#include <exception>
+#include <cstring>
+#include "agg_array.h"
+
+namespace agg {
+
+namespace fman {
+  //---------------------------------------------------------glyph_data_type
+  enum glyph_data_type
+  {
+    glyph_data_invalid = 0,
+    glyph_data_mono    = 1,
+    glyph_data_gray8   = 2,
+    glyph_data_outline = 3
+  };
+
+
+  //-------------------------------------------------------------cached_glyph
+  struct cached_glyph
+  {
+    void *			cached_font;
+    unsigned		glyph_code;
+    unsigned        glyph_index;
+    int8u*          data;
+    unsigned        data_size;
+    glyph_data_type data_type;
+    rect_i          bounds;
+    double          advance_x;
+    double          advance_y;
+  };
+
+
+  //--------------------------------------------------------------cached_glyphs
+  class cached_glyphs
+  {
+  public:
+    enum block_size_e { block_size = 16384-16 };
+
+    //--------------------------------------------------------------------
+    cached_glyphs()
+      : m_allocator(block_size)
+    { std::memset(m_glyphs, 0, sizeof(m_glyphs)); }
+
+    //--------------------------------------------------------------------
+    const cached_glyph* find_glyph(unsigned glyph_code) const
+    {
+      unsigned msb = (glyph_code >> 8) & 0xFF;
+      if(m_glyphs[msb])
+      {
+        return m_glyphs[msb][glyph_code & 0xFF];
+      }
+      return 0;
+    }
+
+    //--------------------------------------------------------------------
+    cached_glyph* cache_glyph(
+      void *			cached_font,
+      unsigned        glyph_code,
+      unsigned        glyph_index,
+      unsigned        data_size,
+      glyph_data_type data_type,
+      const rect_i&   bounds,
+      double          advance_x,
+      double          advance_y)
+    {
+      unsigned msb = (glyph_code >> 8) & 0xFF;
+      if(m_glyphs[msb] == 0)
+      {
+        m_glyphs[msb] =
+          (cached_glyph**)m_allocator.allocate(sizeof(cached_glyph*) * 256,
+          sizeof(cached_glyph*));
+        std::memset(m_glyphs[msb], 0, sizeof(cached_glyph*) * 256);
+      }
+
+      unsigned lsb = glyph_code & 0xFF;
+      if(m_glyphs[msb][lsb]) return 0; // Already exists, do not overwrite
+
+      cached_glyph* glyph =
+        (cached_glyph*)m_allocator.allocate(sizeof(cached_glyph),
+        sizeof(double));
+
+      glyph->cached_font		  = cached_font;
+      glyph->glyph_code		  = glyph_code;
+      glyph->glyph_index        = glyph_index;
+      glyph->data               = m_allocator.allocate(data_size);
+      glyph->data_size          = data_size;
+      glyph->data_type          = data_type;
+      glyph->bounds             = bounds;
+      glyph->advance_x          = advance_x;
+      glyph->advance_y          = advance_y;
+      return m_glyphs[msb][lsb] = glyph;
+    }
+
+  private:
+    block_allocator m_allocator;
+    cached_glyph**   m_glyphs[256];
+  };
+
+
+
+  //------------------------------------------------------------------------
+  enum glyph_rendering
+  {
+    glyph_ren_native_mono,
+    glyph_ren_native_gray8,
+    glyph_ren_outline,
+    glyph_ren_agg_mono,
+    glyph_ren_agg_gray8
+  };
+
+
+
+
+  //------------------------------------------------------font_cache_manager
+  template<class FontEngine> class font_cache_manager
+  {
+  public:
+    typedef FontEngine font_engine_type;
+    typedef font_cache_manager<FontEngine> self_type;
+    typedef typename font_engine_type::path_adaptor_type   path_adaptor_type;
+    typedef typename font_engine_type::gray8_adaptor_type  gray8_adaptor_type;
+    typedef typename gray8_adaptor_type::embedded_scanline gray8_scanline_type;
+    typedef typename font_engine_type::mono_adaptor_type   mono_adaptor_type;
+    typedef typename mono_adaptor_type::embedded_scanline  mono_scanline_type;
+
+    struct cached_font
+    {
+      cached_font(
+        font_engine_type& engine,
+        typename FontEngine::loaded_face *face,
+        double height,
+        double width,
+        bool hinting,
+        glyph_rendering rendering )
+        : m_engine( engine )
+        , m_face( face )
+        , m_height( height )
+        , m_width( width )
+        , m_hinting( hinting )
+        , m_rendering( rendering )
+      {
+        select_face();
+        m_face_height=m_face->height();
+        m_face_width=m_face->width();
+        m_face_ascent=m_face->ascent();
+        m_face_descent=m_face->descent();
+        m_face_ascent_b=m_face->ascent_b();
+        m_face_descent_b=m_face->descent_b();
+      }
+
+      double height() const
+      {
+        return m_face_height;
+      }
+
+      double width() const
+      {
+        return m_face_width;
+      }
+
+      double ascent() const
+      {
+        return m_face_ascent;
+      }
+
+      double descent() const
+      {
+        return m_face_descent;
+      }
+
+      double ascent_b() const
+      {
+        return m_face_ascent_b;
+      }
+
+      double descent_b() const
+      {
+        return m_face_descent_b;
+      }
+
+      bool add_kerning( const cached_glyph *first, const cached_glyph *second, double* x, double* y)
+      {
+        if( !first || !second )
+          return false;
+        select_face();
+        return m_face->add_kerning(
+          first->glyph_index, second->glyph_index, x, y );
+      }
+
+      void select_face()
+      {
+        m_face->select_instance( m_height, m_width, m_hinting, m_rendering );
+      }
+
+      const cached_glyph *get_glyph(unsigned cp)
+      {
+        const cached_glyph *glyph=m_glyphs.find_glyph(cp);
+        if( glyph==0 )
+        {
+          typename FontEngine::prepared_glyph prepared;
+          select_face();
+          bool success=m_face->prepare_glyph(cp, &prepared);
+          if( success )
+          {
+            glyph=m_glyphs.cache_glyph(
+              this,
+              prepared.glyph_code,
+              prepared.glyph_index,
+              prepared.data_size,
+              prepared.data_type,
+              prepared.bounds,
+              prepared.advance_x,
+              prepared.advance_y );
+            assert( glyph!=0 );
+            m_face->write_glyph_to(&prepared,glyph->data);
+          }
+        }
+        return glyph;
+      }
+
+      font_engine_type&   m_engine;
+      typename FontEngine::loaded_face *m_face;
+      double				m_height;
+      double				m_width;
+      bool				m_hinting;
+      glyph_rendering		m_rendering;
+      double				m_face_height;
+      double				m_face_width;
+      double				m_face_ascent;
+      double				m_face_descent;
+      double				m_face_ascent_b;
+      double				m_face_descent_b;
+      cached_glyphs		m_glyphs;
+    };
+
+    //--------------------------------------------------------------------
+    font_cache_manager(font_engine_type& engine, unsigned max_fonts=32)
+      :m_engine(engine)
+    { }
+
+    //--------------------------------------------------------------------
+    void init_embedded_adaptors(const cached_glyph* gl,
+      double x, double y,
+      double scale=1.0)
+    {
+      if(gl)
+      {
+        switch(gl->data_type)
+        {
+        default: return;
+        case glyph_data_mono:
+          m_mono_adaptor.init(gl->data, gl->data_size, x, y);
+          break;
+
+        case glyph_data_gray8:
+          m_gray8_adaptor.init(gl->data, gl->data_size, x, y);
+          break;
+
+        case glyph_data_outline:
+          m_path_adaptor.init(gl->data, gl->data_size, x, y, scale);
+          break;
+        }
+      }
+    }
+
+
+    //--------------------------------------------------------------------
+    path_adaptor_type&   path_adaptor()   { return m_path_adaptor;   }
+    gray8_adaptor_type&  gray8_adaptor()  { return m_gray8_adaptor;  }
+    gray8_scanline_type& gray8_scanline() { return m_gray8_scanline; }
+    mono_adaptor_type&   mono_adaptor()   { return m_mono_adaptor;   }
+    mono_scanline_type&  mono_scanline()  { return m_mono_scanline;  }
+
+
+  private:
+    //--------------------------------------------------------------------
+    font_cache_manager(const self_type&);
+    const self_type& operator = (const self_type&);
+
+    font_engine_type&   m_engine;
+    path_adaptor_type   m_path_adaptor;
+    gray8_adaptor_type  m_gray8_adaptor;
+    gray8_scanline_type m_gray8_scanline;
+    mono_adaptor_type   m_mono_adaptor;
+    mono_scanline_type  m_mono_scanline;
+  };
+
+}
+}
+
+#endif
+
--- a/dep/agg/include/agg_gamma_functions.h
+++ b/dep/agg/include/agg_gamma_functions.h
@@ -0,0 +1,131 @@
+//----------------------------------------------------------------------------
+// Anti-Grain Geometry - Version 2.4
+// Copyright (C) 2002-2005 Maxim Shemanarev (http://www.antigrain.com)
+//
+// Permission to copy, use, modify, sell and distribute this software 
+// is granted provided this copyright notice appears in all copies. 
+// This software is provided "as is" without express or implied
+// warranty, and with no claim as to its suitability for any purpose.
+//
+//----------------------------------------------------------------------------
+// Contact: mcseem@antigrain.com
+//          mcseemagg@yahoo.com
+//          http://www.antigrain.com
+//----------------------------------------------------------------------------
+
+#ifndef AGG_GAMMA_FUNCTIONS_INCLUDED
+#define AGG_GAMMA_FUNCTIONS_INCLUDED
+
+#include "agg_basics.h"
+
+namespace agg
+{
+    //===============================================================gamma_none
+    struct gamma_none
+    {
+        double operator()(double x) const { return x; }
+    };
+
+
+    //==============================================================gamma_power
+    class gamma_power
+    {
+    public:
+        gamma_power() : m_gamma(1.0) {}
+        gamma_power(double g) : m_gamma(g) {}
+
+        void gamma(double g) { m_gamma = g; }
+        double gamma() const { return m_gamma; }
+
+        double operator() (double x) const
+        {
+            return pow(x, m_gamma);
+        }
+
+    private:
+        double m_gamma;
+    };
+
+
+    //==========================================================gamma_threshold
+    class gamma_threshold
+    {
+    public:
+        gamma_threshold() : m_threshold(0.5) {}
+        gamma_threshold(double t) : m_threshold(t) {}
+
+        void threshold(double t) { m_threshold = t; }
+        double threshold() const { return m_threshold; }
+
+        double operator() (double x) const
+        {
+            return (x < m_threshold) ? 0.0 : 1.0;
+        }
+
+    private:
+        double m_threshold;
+    };
+
+
+    //============================================================gamma_linear
+    class gamma_linear
+    {
+    public:
+        gamma_linear() : m_start(0.0), m_end(1.0) {}
+        gamma_linear(double s, double e) : m_start(s), m_end(e) {}
+
+        void set(double s, double e) { m_start = s; m_end = e; }
+        void start(double s) { m_start = s; }
+        void end(double e) { m_end = e; }
+        double start() const { return m_start; }
+        double end() const { return m_end; }
+
+        double operator() (double x) const
+        {
+            if(x < m_start) return 0.0;
+            if(x > m_end) return 1.0;
+            return (x - m_start) / (m_end - m_start);
+        }
+
+    private:
+        double m_start;
+        double m_end;
+    };
+
+
+    //==========================================================gamma_multiply
+    class gamma_multiply
+    {
+    public:
+        gamma_multiply() : m_mul(1.0) {}
+        gamma_multiply(double v) : m_mul(v) {}
+
+        void value(double v) { m_mul = v; }
+        double value() const { return m_mul; }
+
+        double operator() (double x) const
+        {
+            double y = x * m_mul;
+            if(y > 1.0) y = 1.0;
+            return y;
+        }
+
+    private:
+        double m_mul;
+    };
+
+    inline double sRGB_to_linear(double x)
+    {
+        return (x <= 0.04045) ? (x / 12.92) : pow((x + 0.055) / (1.055), 2.4);
+    }
+
+    inline double linear_to_sRGB(double x)
+    {
+        return (x <= 0.0031308) ? (x * 12.92) : (1.055 * pow(x, 1 / 2.4) - 0.055);
+    }
+}
+
+#endif
+
+
+
--- a/dep/agg/include/agg_gamma_lut.h
+++ b/dep/agg/include/agg_gamma_lut.h
@@ -0,0 +1,307 @@
+//----------------------------------------------------------------------------
+// Anti-Grain Geometry - Version 2.4
+// Copyright (C) 2002-2005 Maxim Shemanarev (http://www.antigrain.com)
+//
+// Permission to copy, use, modify, sell and distribute this software 
+// is granted provided this copyright notice appears in all copies. 
+// This software is provided "as is" without express or implied
+// warranty, and with no claim as to its suitability for any purpose.
+//
+//----------------------------------------------------------------------------
+// Contact: mcseem@antigrain.com
+//          mcseemagg@yahoo.com
+//          http://www.antigrain.com
+//----------------------------------------------------------------------------
+
+#ifndef AGG_GAMMA_LUT_INCLUDED
+#define AGG_GAMMA_LUT_INCLUDED
+
+#include <cmath>
+#include "agg_basics.h"
+#include "agg_gamma_functions.h"
+
+namespace agg
+{
+    template<class LoResT=int8u, 
+             class HiResT=int8u, 
+             unsigned GammaShift=8, 
+             unsigned HiResShift=8> class gamma_lut
+    {
+    public:
+        typedef gamma_lut<LoResT, HiResT, GammaShift, HiResShift> self_type;
+
+        enum gamma_scale_e
+        {
+            gamma_shift = GammaShift,
+            gamma_size  = 1 << gamma_shift,
+            gamma_mask  = gamma_size - 1
+        };
+
+        enum hi_res_scale_e
+        {
+            hi_res_shift = HiResShift,
+            hi_res_size  = 1 << hi_res_shift,
+            hi_res_mask  = hi_res_size - 1
+        };
+
+        ~gamma_lut()
+        {
+            pod_allocator<LoResT>::deallocate(m_inv_gamma, hi_res_size);
+            pod_allocator<HiResT>::deallocate(m_dir_gamma, gamma_size);
+        }
+
+        gamma_lut() : 
+            m_gamma(1.0), 
+            m_dir_gamma(pod_allocator<HiResT>::allocate(gamma_size)),
+            m_inv_gamma(pod_allocator<LoResT>::allocate(hi_res_size))
+        {
+            unsigned i;
+            for(i = 0; i < gamma_size; i++)
+            {
+                m_dir_gamma[i] = HiResT(i << (hi_res_shift - gamma_shift));
+            }
+
+            for(i = 0; i < hi_res_size; i++)
+            {
+                m_inv_gamma[i] = LoResT(i >> (hi_res_shift - gamma_shift));
+            }
+        }
+
+        gamma_lut(double g) :
+            m_gamma(1.0), 
+            m_dir_gamma(pod_allocator<HiResT>::allocate(gamma_size)),
+            m_inv_gamma(pod_allocator<LoResT>::allocate(hi_res_size))
+        {
+            gamma(g);
+        }
+
+        void gamma(double g) 
+        {
+            m_gamma = g;
+
+            unsigned i;
+            for(i = 0; i < gamma_size; i++)
+            {
+                m_dir_gamma[i] = (HiResT)
+                    uround(std::pow(i / double(gamma_mask), m_gamma) * double(hi_res_mask));
+            }
+
+            double inv_g = 1.0 / g;
+            for(i = 0; i < hi_res_size; i++)
+            {
+                m_inv_gamma[i] = (LoResT)
+                    uround(std::pow(i / double(hi_res_mask), inv_g) * double(gamma_mask));
+            }
+        }
+
+        double gamma() const
+        {
+            return m_gamma;
+        }
+
+        HiResT dir(LoResT v) const 
+        { 
+            return m_dir_gamma[unsigned(v)]; 
+        }
+
+        LoResT inv(HiResT v) const 
+        { 
+            return m_inv_gamma[unsigned(v)];
+        }
+
+    private:
+        gamma_lut(const self_type&);
+        const self_type& operator = (const self_type&);
+
+        double m_gamma;
+        HiResT* m_dir_gamma;
+        LoResT* m_inv_gamma;
+    };
+
+    //
+    // sRGB support classes
+    //
+
+    // Optimized sRGB lookup table. The direct conversion (sRGB to linear) 
+    // is a straightforward lookup. The inverse conversion (linear to sRGB) 
+    // is implemented using binary search.
+    template<class LinearType>
+    class sRGB_lut_base
+    {
+    public:
+        LinearType dir(int8u v) const
+        {
+            return m_dir_table[v];
+        }
+
+        int8u inv(LinearType v) const
+        {
+            // Unrolled binary search.
+            int8u x = 0;
+            if (v > m_inv_table[128]) x = 128;
+            if (v > m_inv_table[x + 64]) x += 64;
+            if (v > m_inv_table[x + 32]) x += 32;
+            if (v > m_inv_table[x + 16]) x += 16;
+            if (v > m_inv_table[x + 8]) x += 8;
+            if (v > m_inv_table[x + 4]) x += 4;
+            if (v > m_inv_table[x + 2]) x += 2;
+            if (v > m_inv_table[x + 1]) x += 1;
+            return x;
+        }
+
+    protected:
+        LinearType m_dir_table[256];
+        LinearType m_inv_table[256];
+
+        // Only derived classes may instantiate.
+        sRGB_lut_base() 
+        {
+        }
+    };
+
+
+    // sRGB_lut - implements sRGB conversion for the various types.
+    // Base template is undefined, specializations are provided below.
+    template<class LinearType>
+    class sRGB_lut;
+
+    template<>
+    class sRGB_lut<float> : public sRGB_lut_base<float>
+    {
+    public:
+		sRGB_lut()
+		{
+			// Generate lookup tables.
+			m_dir_table[0] = 0;
+			m_inv_table[0] = 0;
+			for (unsigned i = 1; i <= 255; ++i)
+			{
+				// Floating-point RGB is in range [0,1].
+				m_dir_table[i] = float(sRGB_to_linear(i / 255.0));
+				m_inv_table[i] = float(sRGB_to_linear((i - 0.5) / 255.0));
+			}
+		}
+    };
+
+    template<>
+    class sRGB_lut<int16u> : public sRGB_lut_base<int16u>
+    {
+    public:
+        sRGB_lut()
+        {
+            // Generate lookup tables.
+            m_dir_table[0] = 0;
+            m_inv_table[0] = 0;
+            for (int i = 1; i <= 255; ++i)
+            {
+                // 16-bit RGB is in range [0,65535].
+                m_dir_table[i] = uround(65535.0 * sRGB_to_linear(i / 255.0));
+                m_inv_table[i] = uround(65535.0 * sRGB_to_linear((i - 0.5) / 255.0));
+            }
+        }
+    };
+
+    template<>
+    class sRGB_lut<int8u> : public sRGB_lut_base<int8u>
+    {
+    public:
+        sRGB_lut()
+        {
+            // Generate lookup tables. 
+            m_dir_table[0] = 0;
+            m_inv_table[0] = 0;
+            for (int i = 1; i <= 255; ++i)
+            {
+                // 8-bit RGB is handled with simple bidirectional lookup tables.
+                m_dir_table[i] = uround(255.0 * sRGB_to_linear(i / 255.0));
+                m_inv_table[i] = uround(255.0 * linear_to_sRGB(i / 255.0));
+            }
+        }
+
+        int8u inv(int8u v) const
+        {
+            // In this case, the inverse transform is a simple lookup.
+            return m_inv_table[v];
+        }
+    };
+
+    // Common base class for sRGB_conv objects. Defines an internal 
+    // sRGB_lut object so that users don't have to.
+    template<class T>
+    class sRGB_conv_base
+    {
+    public:
+        static T rgb_from_sRGB(int8u x)
+        {
+            return lut.dir(x);
+        }
+
+        static int8u rgb_to_sRGB(T x)
+        {
+            return lut.inv(x);
+        }
+
+    private:
+        static sRGB_lut<T> lut;
+    };
+
+    // Definition of sRGB_conv_base::lut. Due to the fact that this a template, 
+    // we don't need to place the definition in a cpp file. Hurrah.
+    template<class T>
+    sRGB_lut<T> sRGB_conv_base<T>::lut;
+
+    // Wrapper for sRGB-linear conversion. 
+    // Base template is undefined, specializations are provided below.
+    template<class T>
+    class sRGB_conv;
+
+    template<>
+    class sRGB_conv<float> : public sRGB_conv_base<float>
+    {
+    public:
+        static float alpha_from_sRGB(int8u x)
+        {
+            static const double y = 1 / 255.0;
+            return float(x * y);
+        }
+
+        static int8u alpha_to_sRGB(float x)
+        {
+            if (x < 0) return 0;
+            if (x > 1) return 255;
+            return int8u(0.5 + x * 255);
+        }
+    };
+
+    template<>
+    class sRGB_conv<int16u> : public sRGB_conv_base<int16u>
+    {
+    public:
+        static int16u alpha_from_sRGB(int8u x)
+        {
+            return (x << 8) | x;
+        }
+
+        static int8u alpha_to_sRGB(int16u x)
+        {
+            return x >> 8;
+        }
+    };
+
+    template<>
+    class sRGB_conv<int8u> : public sRGB_conv_base<int8u>
+    {
+    public:
+        static int8u alpha_from_sRGB(int8u x)
+        {
+            return x;
+        }
+
+        static int8u alpha_to_sRGB(int8u x)
+        {
+            return x;
+        }
+    };
+}
+
+#endif
--- a/dep/agg/include/agg_glyph_raster_bin.h
+++ b/dep/agg/include/agg_glyph_raster_bin.h
@@ -0,0 +1,155 @@
+//----------------------------------------------------------------------------
+// Anti-Grain Geometry - Version 2.4
+// Copyright (C) 2002-2005 Maxim Shemanarev (http://www.antigrain.com)
+//
+// Permission to copy, use, modify, sell and distribute this software 
+// is granted provided this copyright notice appears in all copies. 
+// This software is provided "as is" without express or implied
+// warranty, and with no claim as to its suitability for any purpose.
+//
+//----------------------------------------------------------------------------
+// Contact: mcseem@antigrain.com
+//          mcseemagg@yahoo.com
+//          http://www.antigrain.com
+//----------------------------------------------------------------------------
+
+#ifndef AGG_GLYPH_RASTER_BIN_INCLUDED
+#define AGG_GLYPH_RASTER_BIN_INCLUDED
+
+#include <cstring>
+#include "agg_basics.h"
+
+namespace agg
+{
+
+    //========================================================glyph_raster_bin
+    template<class ColorT> class glyph_raster_bin
+    {
+    public:
+        typedef ColorT color_type;
+
+        //--------------------------------------------------------------------
+        struct glyph_rect
+        {
+            int x1,y1,x2,y2;
+            double dx, dy;
+        };
+
+        //--------------------------------------------------------------------
+        glyph_raster_bin(const int8u* font) :
+            m_font(font),
+            m_big_endian(false)
+        {
+            int t = 1;
+            if(*(char*)&t == 0) m_big_endian = true;
+            std::memset(m_span, 0, sizeof(m_span));
+        }
+
+        //--------------------------------------------------------------------
+        const int8u* font() const { return m_font; }
+        void font(const int8u* f) { m_font = f; }
+
+        //--------------------------------------------------------------------
+        double height()    const { return m_font[0]; }
+        double base_line() const { return m_font[1]; }
+
+        //--------------------------------------------------------------------
+        template<class CharT>
+        double width(const CharT* str) const
+        {
+            unsigned start_char = m_font[2];
+            unsigned num_chars = m_font[3];
+
+            unsigned w = 0;
+            while(*str)
+            {
+                unsigned glyph = *str;
+                const int8u* bits = m_font + 4 + num_chars * 2 + 
+                                    value(m_font + 4 + (glyph - start_char) * 2);
+                w += *bits;
+                ++str;
+            }
+            return w;
+        }
+
+        //--------------------------------------------------------------------
+        void prepare(glyph_rect* r, double x, double y, unsigned glyph, bool flip)
+        {
+            unsigned start_char = m_font[2];
+            unsigned num_chars = m_font[3];
+
+            m_bits = m_font + 4 + num_chars * 2 + 
+                     value(m_font + 4 + (glyph - start_char) * 2);
+
+            m_glyph_width = *m_bits++;
+            m_glyph_byte_width = (m_glyph_width + 7) >> 3;
+
+            r->x1 = int(x);
+            r->x2 = r->x1 + m_glyph_width - 1;
+            if(flip)
+            {
+                r->y1 = int(y) - m_font[0] + m_font[1];
+                r->y2 = r->y1 + m_font[0] - 1;
+            }
+            else
+            {
+                r->y1 = int(y) - m_font[1] + 1;
+                r->y2 = r->y1 + m_font[0] - 1;
+            }
+            r->dx = m_glyph_width; 
+            r->dy = 0;
+        }
+
+        //--------------------------------------------------------------------
+        const cover_type* span(unsigned i)
+        {
+            i = m_font[0] - i - 1;
+            const int8u* bits = m_bits + i * m_glyph_byte_width;
+            unsigned j;
+            unsigned val = *bits;
+            unsigned nb = 0;
+            for(j = 0; j < m_glyph_width; ++j)
+            {
+                m_span[j] = (cover_type)((val & 0x80) ? cover_full : cover_none);
+                val <<= 1;
+                if(++nb >= 8)
+                {
+                    val = *++bits;
+                    nb = 0;
+                }
+            }
+            return m_span;
+        }
+
+    private:
+        //--------------------------------------------------------------------
+        int16u value(const int8u* p) const
+        {
+            int16u v;
+            if(m_big_endian)
+            {
+                 *(int8u*)&v      = p[1];
+                *((int8u*)&v + 1) = p[0];
+            }
+            else
+            {
+                 *(int8u*)&v      = p[0];
+                *((int8u*)&v + 1) = p[1];
+            }
+            return v;
+        }
+
+
+        //--------------------------------------------------------------------
+        const int8u* m_font;
+        bool m_big_endian;
+        cover_type m_span[32];
+        const int8u* m_bits;
+        unsigned m_glyph_width;
+        unsigned m_glyph_byte_width;
+    };
+
+
+}
+
+#endif
--- a/dep/agg/include/agg_gradient_lut.h
+++ b/dep/agg/include/agg_gradient_lut.h
@@ -0,0 +1,244 @@
+//----------------------------------------------------------------------------
+// Anti-Grain Geometry - Version 2.4
+// Copyright (C) 2002-2005 Maxim Shemanarev (http://www.antigrain.com)
+//
+// Permission to copy, use, modify, sell and distribute this software 
+// is granted provided this copyright notice appears in all copies. 
+// This software is provided "as is" without express or implied
+// warranty, and with no claim as to its suitability for any purpose.
+//
+//----------------------------------------------------------------------------
+// Contact: mcseem@antigrain.com
+//          mcseemagg@yahoo.com
+//          http://www.antigrain.com
+//----------------------------------------------------------------------------
+
+#ifndef AGG_GRADIENT_LUT_INCLUDED
+#define AGG_GRADIENT_LUT_INCLUDED
+
+#include "agg_array.h"
+#include "agg_dda_line.h"
+#include "agg_color_rgba.h"
+#include "agg_color_gray.h"
+
+namespace agg
+{
+
+    //======================================================color_interpolator
+    template<class ColorT> struct color_interpolator
+    {
+    public:
+        typedef ColorT color_type;
+
+        color_interpolator(const color_type& c1, 
+                           const color_type& c2, 
+                           unsigned len) :
+            m_c1(c1),
+            m_c2(c2),
+            m_len(len),
+            m_count(0)
+        {}
+
+        void operator ++ ()
+        {
+            ++m_count;
+        }
+
+        color_type color() const
+        {
+            return m_c1.gradient(m_c2, double(m_count) / m_len);
+        }
+
+    private:
+        color_type m_c1;
+        color_type m_c2;
+        unsigned   m_len;
+        unsigned   m_count;
+    };
+
+    //========================================================================
+    // Fast specialization for rgba8
+    template<> struct color_interpolator<rgba8>
+    {
+    public:
+        typedef rgba8 color_type;
+
+        color_interpolator(const color_type& c1, 
+                           const color_type& c2, 
+                           unsigned len) :
+            r(c1.r, c2.r, len),
+            g(c1.g, c2.g, len),
+            b(c1.b, c2.b, len),
+            a(c1.a, c2.a, len)
+        {}
+
+        void operator ++ ()
+        {
+            ++r; ++g; ++b; ++a;
+        }
+
+        color_type color() const
+        {
+            return color_type(r.y(), g.y(), b.y(), a.y());
+        }
+
+    private:
+        agg::dda_line_interpolator<14> r, g, b, a;
+    };
+
+    //========================================================================
+    // Fast specialization for gray8
+    template<> struct color_interpolator<gray8>
+    {
+    public:
+        typedef gray8 color_type;
+
+        color_interpolator(const color_type& c1, 
+                           const color_type& c2, 
+                           unsigned len) :
+            v(c1.v, c2.v, len),
+            a(c1.a, c2.a, len)
+        {}
+
+        void operator ++ ()
+        {
+            ++v; ++a;
+        }
+
+        color_type color() const
+        {
+            return color_type(v.y(), a.y());
+        }
+
+    private:
+        agg::dda_line_interpolator<14> v,a;
+    };
+
+    //============================================================gradient_lut
+    template<class ColorInterpolator, 
+             unsigned ColorLutSize=256> class gradient_lut
+    {
+    public:
+        typedef ColorInterpolator interpolator_type;
+        typedef typename interpolator_type::color_type color_type;
+        enum { color_lut_size = ColorLutSize };
+
+        //--------------------------------------------------------------------
+        gradient_lut() : m_color_lut(color_lut_size) {}
+
+        // Build Gradient Lut
+        // First, call remove_all(), then add_color() at least twice, 
+        // then build_lut(). Argument "offset" in add_color must be 
+        // in range [0...1] and defines a color stop as it is described 
+        // in SVG specification, section Gradients and Patterns. 
+        // The simplest linear gradient is:
+        //    gradient_lut.add_color(0.0, start_color);
+        //    gradient_lut.add_color(1.0, end_color);
+        //--------------------------------------------------------------------
+        void remove_all();
+        void add_color(double offset, const color_type& color);
+        void build_lut();
+
+        // Size-index Interface. This class can be used directly as the 
+        // ColorF in span_gradient. All it needs is two access methods 
+        // size() and operator [].
+        //--------------------------------------------------------------------
+        static unsigned size() 
+        { 
+            return color_lut_size; 
+        }
+        const color_type& operator [] (unsigned i) const 
+        { 
+            return m_color_lut[i]; 
+        }
+
+    private:
+        //--------------------------------------------------------------------
+        struct color_point
+        {
+            double     offset;
+            color_type color;
+
+            color_point() {}
+            color_point(double off, const color_type& c) : 
+                offset(off), color(c)
+            {
+                if(offset < 0.0) offset = 0.0;
+                if(offset > 1.0) offset = 1.0;
+            }
+        };
+        typedef agg::pod_bvector<color_point, 4> color_profile_type;
+        typedef agg::pod_array<color_type>       color_lut_type;
+
+        static bool offset_less(const color_point& a, const color_point& b)
+        {
+            return a.offset < b.offset;
+        }
+        static bool offset_equal(const color_point& a, const color_point& b)
+        {
+            return a.offset == b.offset;
+        }
+
+        //--------------------------------------------------------------------
+        color_profile_type  m_color_profile;
+        color_lut_type      m_color_lut;
+    };
+
+
+
+    //------------------------------------------------------------------------
+    template<class T, unsigned S>
+    void gradient_lut<T,S>::remove_all()
+    { 
+        m_color_profile.remove_all(); 
+    }
+
+    //------------------------------------------------------------------------
+    template<class T, unsigned S>
+    void gradient_lut<T,S>::add_color(double offset, const color_type& color)
+    {
+        m_color_profile.add(color_point(offset, color));
+    }
+
+    //------------------------------------------------------------------------
+    template<class T, unsigned S>
+    void gradient_lut<T,S>::build_lut()
+    {
+        quick_sort(m_color_profile, offset_less);
+        m_color_profile.cut_at(remove_duplicates(m_color_profile, offset_equal));
+        if(m_color_profile.size() >= 2)
+        {
+            unsigned i;
+            unsigned start = uround(m_color_profile[0].offset * color_lut_size);
+            unsigned end;
+            color_type c = m_color_profile[0].color;
+            for(i = 0; i < start; i++) 
+            {
+                m_color_lut[i] = c;
+            }
+            for(i = 1; i < m_color_profile.size(); i++)
+            {
+                end  = uround(m_color_profile[i].offset * color_lut_size);
+                interpolator_type ci(m_color_profile[i-1].color, 
+                                     m_color_profile[i  ].color, 
+                                     end - start + 1);
+                while(start < end)
+                {
+                    m_color_lut[start] = ci.color();
+                    ++ci;
+                    ++start;
+                }
+            }
+            c = m_color_profile.last().color;
+            for(; end < m_color_lut.size(); end++)
+            {
+                m_color_lut[end] = c;
+            }
+        }
+    }
+}
+
+
+
+
+#endif
--- a/dep/agg/include/agg_gsv_text.h
+++ b/dep/agg/include/agg_gsv_text.h
@@ -0,0 +1,153 @@
+//----------------------------------------------------------------------------
+// Anti-Grain Geometry - Version 2.4
+// Copyright (C) 2002-2005 Maxim Shemanarev (http://www.antigrain.com)
+//
+// Permission to copy, use, modify, sell and distribute this software 
+// is granted provided this copyright notice appears in all copies. 
+// This software is provided "as is" without express or implied
+// warranty, and with no claim as to its suitability for any purpose.
+//
+//----------------------------------------------------------------------------
+// Contact: mcseem@antigrain.com
+//          mcseemagg@yahoo.com
+//          http://www.antigrain.com
+//----------------------------------------------------------------------------
+//
+// Class gsv_text
+//
+//----------------------------------------------------------------------------
+
+#ifndef AGG_GSV_TEXT_INCLUDED
+#define AGG_GSV_TEXT_INCLUDED
+
+#include "agg_array.h"
+#include "agg_conv_stroke.h"
+#include "agg_conv_transform.h"
+
+namespace agg
+{
+
+
+    //---------------------------------------------------------------gsv_text
+    //
+    // See Implementation agg_gsv_text.cpp 
+    //
+    class gsv_text
+    {
+        enum status
+        {
+            initial,
+            next_char,
+            start_glyph,
+            glyph
+        };
+
+    public:
+        gsv_text();
+
+        void font(const void* font);
+        void flip(bool flip_y) { m_flip = flip_y; }
+        void load_font(const char* file);
+        void size(double height, double width=0.0);
+        void space(double space);
+        void line_space(double line_space);
+        void start_point(double x, double y);
+        void text(const char* text);
+        
+        double text_width();
+
+        void rewind(unsigned path_id);
+        unsigned vertex(double* x, double* y);
+
+    private:
+        // not supposed to be copied
+        gsv_text(const gsv_text&);
+        const gsv_text& operator = (const gsv_text&);
+
+        int16u value(const int8u* p) const
+        {
+            int16u v;
+            if(m_big_endian)
+            {
+                 *(int8u*)&v      = p[1];
+                *((int8u*)&v + 1) = p[0];
+            }
+            else
+            {
+                 *(int8u*)&v      = p[0];
+                *((int8u*)&v + 1) = p[1];
+            }
+            return v;
+        }
+
+    private:
+        double          m_x;
+        double          m_y;
+        double          m_start_x;
+        double          m_width;
+        double          m_height;
+        double          m_space;
+        double          m_line_space;
+        char            m_chr[2];
+        char*           m_text;
+        pod_array<char> m_text_buf;
+        char*           m_cur_chr;
+        const void*     m_font;
+        pod_array<char> m_loaded_font;
+        status          m_status;
+        bool            m_big_endian;
+        bool            m_flip;
+        int8u*          m_indices;
+        int8*           m_glyphs;
+        int8*           m_bglyph;
+        int8*           m_eglyph;
+        double          m_w;
+        double          m_h;
+    };
+
+
+
+
+    //--------------------------------------------------------gsv_text_outline
+    template<class Transformer = trans_affine> class gsv_text_outline
+    {
+    public:
+        gsv_text_outline(gsv_text& text, Transformer& trans) :
+          m_polyline(text),
+          m_trans(m_polyline, trans)
+        {
+        }
+
+        void width(double w) 
+        { 
+            m_polyline.width(w); 
+        }
+
+        void transformer(const Transformer* trans) 
+        {
+            m_trans->transformer(trans);
+        }
+
+        void rewind(unsigned path_id) 
+        { 
+            m_trans.rewind(path_id); 
+            m_polyline.line_join(round_join);
+            m_polyline.line_cap(round_cap);
+        }
+
+        unsigned vertex(double* x, double* y)
+        {
+            return m_trans.vertex(x, y);
+        }
+
+    private:
+        conv_stroke<gsv_text> m_polyline;
+        conv_transform<conv_stroke<gsv_text>, Transformer> m_trans;
+    };
+
+
+
+}
+
+
+#endif
--- a/dep/agg/include/agg_image_accessors.h
+++ b/dep/agg/include/agg_image_accessors.h
@@ -0,0 +1,481 @@
+//----------------------------------------------------------------------------
+// Anti-Grain Geometry - Version 2.4
+// Copyright (C) 2002-2005 Maxim Shemanarev (http://www.antigrain.com)
+//
+// Permission to copy, use, modify, sell and distribute this software 
+// is granted provided this copyright notice appears in all copies. 
+// This software is provided "as is" without express or implied
+// warranty, and with no claim as to its suitability for any purpose.
+//
+//----------------------------------------------------------------------------
+// Contact: mcseem@antigrain.com
+//          mcseemagg@yahoo.com
+//          http://www.antigrain.com
+//----------------------------------------------------------------------------
+
+#ifndef AGG_IMAGE_ACCESSORS_INCLUDED
+#define AGG_IMAGE_ACCESSORS_INCLUDED
+
+#include "agg_basics.h"
+
+namespace agg
+{
+
+    //-----------------------------------------------------image_accessor_clip
+    template<class PixFmt> class image_accessor_clip
+    {
+    public:
+        typedef PixFmt   pixfmt_type;
+        typedef typename pixfmt_type::color_type color_type;
+        typedef typename pixfmt_type::order_type order_type;
+        typedef typename pixfmt_type::value_type value_type;
+        enum pix_width_e { pix_width = pixfmt_type::pix_width };
+
+        image_accessor_clip() {}
+        explicit image_accessor_clip(pixfmt_type& pixf, 
+                                     const color_type& bk) : 
+            m_pixf(&pixf)
+        {
+            pixfmt_type::make_pix(m_bk_buf, bk);
+        }
+
+        void attach(pixfmt_type& pixf)
+        {
+            m_pixf = &pixf;
+        }
+
+        void background_color(const color_type& bk)
+        {
+            pixfmt_type::make_pix(m_bk_buf, bk);
+        }
+
+    private:
+        AGG_INLINE const int8u* pixel() const
+        {
+            if(m_y >= 0 && m_y < (int)m_pixf->height() &&
+               m_x >= 0 && m_x < (int)m_pixf->width())
+            {
+                return m_pixf->pix_ptr(m_x, m_y);
+            }
+            return m_bk_buf;
+        }
+
+    public:
+        AGG_INLINE const int8u* span(int x, int y, unsigned len)
+        {
+            m_x = m_x0 = x;
+            m_y = y;
+            if(y >= 0 && y < (int)m_pixf->height() &&
+               x >= 0 && x+(int)len <= (int)m_pixf->width())
+            {
+                return m_pix_ptr = m_pixf->pix_ptr(x, y);
+            }
+            m_pix_ptr = 0;
+            return pixel();
+        }
+
+        AGG_INLINE const int8u* next_x()
+        {
+            if(m_pix_ptr) return m_pix_ptr += pix_width;
+            ++m_x;
+            return pixel();
+        }
+
+        AGG_INLINE const int8u* next_y()
+        {
+            ++m_y;
+            m_x = m_x0;
+            if(m_pix_ptr && 
+               m_y >= 0 && m_y < (int)m_pixf->height())
+            {
+                return m_pix_ptr = m_pixf->pix_ptr(m_x, m_y);
+            }
+            m_pix_ptr = 0;
+            return pixel();
+        }
+
+    private:
+        const pixfmt_type* m_pixf;
+        int8u              m_bk_buf[pix_width];
+        int                m_x, m_x0, m_y;
+        const int8u*       m_pix_ptr;
+    };
+
+
+
+
+    //--------------------------------------------------image_accessor_no_clip
+    template<class PixFmt> class image_accessor_no_clip
+    {
+    public:
+        typedef PixFmt   pixfmt_type;
+        typedef typename pixfmt_type::color_type color_type;
+        typedef typename pixfmt_type::order_type order_type;
+        typedef typename pixfmt_type::value_type value_type;
+        enum pix_width_e { pix_width = pixfmt_type::pix_width };
+
+        image_accessor_no_clip() {}
+        explicit image_accessor_no_clip(pixfmt_type& pixf) : 
+            m_pixf(&pixf) 
+        {}
+
+        void attach(pixfmt_type& pixf)
+        {
+            m_pixf = &pixf;
+        }
+
+        AGG_INLINE const int8u* span(int x, int y, unsigned)
+        {
+            m_x = x;
+            m_y = y;
+            return m_pix_ptr = m_pixf->pix_ptr(x, y);
+        }
+
+        AGG_INLINE const int8u* next_x()
+        {
+            return m_pix_ptr += pix_width;
+        }
+
+        AGG_INLINE const int8u* next_y()
+        {
+            ++m_y;
+            return m_pix_ptr = m_pixf->pix_ptr(m_x, m_y);
+        }
+
+    private:
+        const pixfmt_type* m_pixf;
+        int                m_x, m_y;
+        const int8u*       m_pix_ptr;
+    };
+
+
+
+
+    //----------------------------------------------------image_accessor_clone
+    template<class PixFmt> class image_accessor_clone
+    {
+    public:
+        typedef PixFmt   pixfmt_type;
+        typedef typename pixfmt_type::color_type color_type;
+        typedef typename pixfmt_type::order_type order_type;
+        typedef typename pixfmt_type::value_type value_type;
+        enum pix_width_e { pix_width = pixfmt_type::pix_width };
+
+        image_accessor_clone() {}
+        explicit image_accessor_clone(pixfmt_type& pixf) : 
+            m_pixf(&pixf) 
+        {}
+
+        void attach(pixfmt_type& pixf)
+        {
+            m_pixf = &pixf;
+        }
+
+    private:
+        AGG_INLINE const int8u* pixel() const
+        {
+            int x = m_x;
+            int y = m_y;
+            if(x < 0) x = 0;
+            if(y < 0) y = 0;
+            if(x >= (int)m_pixf->width())  x = m_pixf->width() - 1;
+            if(y >= (int)m_pixf->height()) y = m_pixf->height() - 1;
+            return m_pixf->pix_ptr(x, y);
+        }
+
+    public:
+        AGG_INLINE const int8u* span(int x, int y, unsigned len)
+        {
+            m_x = m_x0 = x;
+            m_y = y;
+            if(y >= 0 && y < (int)m_pixf->height() &&
+               x >= 0 && x+len <= (int)m_pixf->width())
+            {
+                return m_pix_ptr = m_pixf->pix_ptr(x, y);
+            }
+            m_pix_ptr = 0;
+            return pixel();
+        }
+
+        AGG_INLINE const int8u* next_x()
+        {
+            if(m_pix_ptr) return m_pix_ptr += pix_width;
+            ++m_x;
+            return pixel();
+        }
+
+        AGG_INLINE const int8u* next_y()
+        {
+            ++m_y;
+            m_x = m_x0;
+            if(m_pix_ptr && 
+               m_y >= 0 && m_y < (int)m_pixf->height())
+            {
+                return m_pix_ptr = m_pixf->pix_ptr(m_x, m_y);
+            }
+            m_pix_ptr = 0;
+            return pixel();
+        }
+
+    private:
+        const pixfmt_type* m_pixf;
+        int                m_x, m_x0, m_y;
+        const int8u*       m_pix_ptr;
+    };
+
+
+
+
+
+    //-----------------------------------------------------image_accessor_wrap
+    template<class PixFmt, class WrapX, class WrapY> class image_accessor_wrap
+    {
+    public:
+        typedef PixFmt   pixfmt_type;
+        typedef typename pixfmt_type::color_type color_type;
+        typedef typename pixfmt_type::order_type order_type;
+        typedef typename pixfmt_type::value_type value_type;
+        enum pix_width_e { pix_width = pixfmt_type::pix_width };
+
+        image_accessor_wrap() {}
+        explicit image_accessor_wrap(pixfmt_type& pixf) : 
+            m_pixf(&pixf), 
+            m_wrap_x(pixf.width()), 
+            m_wrap_y(pixf.height())
+        {}
+
+        void attach(pixfmt_type& pixf)
+        {
+            m_pixf = &pixf;
+        }
+
+        AGG_INLINE const int8u* span(int x, int y, unsigned)
+        {
+            m_x = x;
+            m_row_ptr = m_pixf->pix_ptr(0, m_wrap_y(y));
+            return m_row_ptr + m_wrap_x(x) * pix_width;
+        }
+
+        AGG_INLINE const int8u* next_x()
+        {
+            int x = ++m_wrap_x;
+            return m_row_ptr + x * pix_width;
+        }
+
+        AGG_INLINE const int8u* next_y()
+        {
+            m_row_ptr = m_pixf->pix_ptr(0, ++m_wrap_y);
+            return m_row_ptr + m_wrap_x(m_x) * pix_width;
+        }
+
+    private:
+        const pixfmt_type* m_pixf;
+        const int8u*       m_row_ptr;
+        int                m_x;
+        WrapX              m_wrap_x;
+        WrapY              m_wrap_y;
+    };
+
+
+
+
+    //--------------------------------------------------------wrap_mode_repeat
+    class wrap_mode_repeat
+    {
+    public:
+        wrap_mode_repeat() {}
+        wrap_mode_repeat(unsigned size) : 
+            m_size(size), 
+            m_add(size * (0x3FFFFFFF / size)),
+            m_value(0)
+        {}
+
+        AGG_INLINE unsigned operator() (int v)
+        { 
+            return m_value = (unsigned(v) + m_add) % m_size; 
+        }
+
+        AGG_INLINE unsigned operator++ ()
+        {
+            ++m_value;
+            if(m_value >= m_size) m_value = 0;
+            return m_value;
+        }
+    private:
+        unsigned m_size;
+        unsigned m_add;
+        unsigned m_value;
+    };
+
+
+    //---------------------------------------------------wrap_mode_repeat_pow2
+    class wrap_mode_repeat_pow2
+    {
+    public:
+        wrap_mode_repeat_pow2() {}
+        wrap_mode_repeat_pow2(unsigned size) : m_value(0)
+        {
+            m_mask = 1;
+            while(m_mask < size) m_mask = (m_mask << 1) | 1;
+            m_mask >>= 1;
+        }
+        AGG_INLINE unsigned operator() (int v)
+        { 
+            return m_value = unsigned(v) & m_mask;
+        }
+        AGG_INLINE unsigned operator++ ()
+        {
+            ++m_value;
+            if(m_value > m_mask) m_value = 0;
+            return m_value;
+        }
+    private:
+        unsigned m_mask;
+        unsigned m_value;
+    };
+
+
+    //----------------------------------------------wrap_mode_repeat_auto_pow2
+    class wrap_mode_repeat_auto_pow2
+    {
+    public:
+        wrap_mode_repeat_auto_pow2() {}
+        wrap_mode_repeat_auto_pow2(unsigned size) :
+            m_size(size),
+            m_add(size * (0x3FFFFFFF / size)),
+            m_mask((m_size & (m_size-1)) ? 0 : m_size-1),
+            m_value(0)
+        {}
+
+        AGG_INLINE unsigned operator() (int v) 
+        { 
+            if(m_mask) return m_value = unsigned(v) & m_mask;
+            return m_value = (unsigned(v) + m_add) % m_size;
+        }
+        AGG_INLINE unsigned operator++ ()
+        {
+            ++m_value;
+            if(m_value >= m_size) m_value = 0;
+            return m_value;
+        }
+
+    private:
+        unsigned m_size;
+        unsigned m_add;
+        unsigned m_mask;
+        unsigned m_value;
+    };
+
+
+    //-------------------------------------------------------wrap_mode_reflect
+    class wrap_mode_reflect
+    {
+    public:
+        wrap_mode_reflect() {}
+        wrap_mode_reflect(unsigned size) : 
+            m_size(size), 
+            m_size2(size * 2),
+            m_add(m_size2 * (0x3FFFFFFF / m_size2)),
+            m_value(0)
+        {}
+
+        AGG_INLINE unsigned operator() (int v)
+        { 
+            m_value = (unsigned(v) + m_add) % m_size2;
+            if(m_value >= m_size) return m_size2 - m_value - 1;
+            return m_value;
+        }
+
+        AGG_INLINE unsigned operator++ ()
+        {
+            ++m_value;
+            if(m_value >= m_size2) m_value = 0;
+            if(m_value >= m_size) return m_size2 - m_value - 1;
+            return m_value;
+        }
+    private:
+        unsigned m_size;
+        unsigned m_size2;
+        unsigned m_add;
+        unsigned m_value;
+    };
+
+
+
+    //--------------------------------------------------wrap_mode_reflect_pow2
+    class wrap_mode_reflect_pow2
+    {
+    public:
+        wrap_mode_reflect_pow2() {}
+        wrap_mode_reflect_pow2(unsigned size) : m_value(0)
+        {
+            m_mask = 1;
+            m_size = 1;
+            while(m_mask < size) 
+            {
+                m_mask = (m_mask << 1) | 1;
+                m_size <<= 1;
+            }
+        }
+        AGG_INLINE unsigned operator() (int v)
+        { 
+            m_value = unsigned(v) & m_mask;
+            if(m_value >= m_size) return m_mask - m_value;
+            return m_value;
+        }
+        AGG_INLINE unsigned operator++ ()
+        {
+            ++m_value;
+            m_value &= m_mask;
+            if(m_value >= m_size) return m_mask - m_value;
+            return m_value;
+        }
+    private:
+        unsigned m_size;
+        unsigned m_mask;
+        unsigned m_value;
+    };
+
+
+
+    //---------------------------------------------wrap_mode_reflect_auto_pow2
+    class wrap_mode_reflect_auto_pow2
+    {
+    public:
+        wrap_mode_reflect_auto_pow2() {}
+        wrap_mode_reflect_auto_pow2(unsigned size) :
+            m_size(size),
+            m_size2(size * 2),
+            m_add(m_size2 * (0x3FFFFFFF / m_size2)),
+            m_mask((m_size2 & (m_size2-1)) ? 0 : m_size2-1),
+            m_value(0)
+        {}
+
+        AGG_INLINE unsigned operator() (int v) 
+        { 
+            m_value = m_mask ? unsigned(v) & m_mask : 
+                              (unsigned(v) + m_add) % m_size2;
+            if(m_value >= m_size) return m_size2 - m_value - 1;
+            return m_value;            
+        }
+        AGG_INLINE unsigned operator++ ()
+        {
+            ++m_value;
+            if(m_value >= m_size2) m_value = 0;
+            if(m_value >= m_size) return m_size2 - m_value - 1;
+            return m_value;
+        }
+
+    private:
+        unsigned m_size;
+        unsigned m_size2;
+        unsigned m_add;
+        unsigned m_mask;
+        unsigned m_value;
+    };
+
+
+}
+
+
+#endif
--- a/dep/agg/include/agg_image_filters.h
+++ b/dep/agg/include/agg_image_filters.h
@@ -0,0 +1,449 @@
+//----------------------------------------------------------------------------
+// Anti-Grain Geometry - Version 2.4
+// Copyright (C) 2002-2005 Maxim Shemanarev (http://www.antigrain.com)
+//
+// Permission to copy, use, modify, sell and distribute this software 
+// is granted provided this copyright notice appears in all copies. 
+// This software is provided "as is" without express or implied
+// warranty, and with no claim as to its suitability for any purpose.
+//
+//----------------------------------------------------------------------------
+// Contact: mcseem@antigrain.com
+//          mcseemagg@yahoo.com
+//          http://www.antigrain.com
+//----------------------------------------------------------------------------
+//
+// Image transformation filters,
+// Filtering classes (image_filter_lut, image_filter),
+// Basic filter shape classes
+//----------------------------------------------------------------------------
+#ifndef AGG_IMAGE_FILTERS_INCLUDED
+#define AGG_IMAGE_FILTERS_INCLUDED
+
+#include "agg_array.h"
+#include "agg_math.h"
+
+namespace agg
+{
+
+    // See Implementation agg_image_filters.cpp 
+
+    enum image_filter_scale_e
+    {
+        image_filter_shift = 14,                      //----image_filter_shift
+        image_filter_scale = 1 << image_filter_shift, //----image_filter_scale 
+        image_filter_mask  = image_filter_scale - 1   //----image_filter_mask 
+    };
+
+    enum image_subpixel_scale_e
+    {
+        image_subpixel_shift = 8,                         //----image_subpixel_shift
+        image_subpixel_scale = 1 << image_subpixel_shift, //----image_subpixel_scale 
+        image_subpixel_mask  = image_subpixel_scale - 1   //----image_subpixel_mask 
+    };
+
+
+    //-----------------------------------------------------image_filter_lut
+    class image_filter_lut
+    {
+    public:
+        template<class FilterF> void calculate(const FilterF& filter,
+                                               bool normalization=true)
+        {
+			filter; // prevent erroneous C4100 in MSVC
+            double r = filter.radius();
+            realloc_lut(r);
+            unsigned i;
+            unsigned pivot = diameter() << (image_subpixel_shift - 1);
+            for(i = 0; i < pivot; i++)
+            {
+                double x = double(i) / double(image_subpixel_scale);
+                double y = filter.calc_weight(x);
+                m_weight_array[pivot + i] = 
+                m_weight_array[pivot - i] = (int16)iround(y * image_filter_scale);
+            }
+            unsigned end = (diameter() << image_subpixel_shift) - 1;
+            m_weight_array[0] = m_weight_array[end];
+            if(normalization) 
+            {
+                normalize();
+            }
+        }
+
+        image_filter_lut() : m_radius(0), m_diameter(0), m_start(0) {}
+
+        template<class FilterF> image_filter_lut(const FilterF& filter, 
+                                                 bool normalization=true)
+        {
+            calculate(filter, normalization);
+        }
+
+        double       radius()       const { return m_radius;   }
+        unsigned     diameter()     const { return m_diameter; }
+        int          start()        const { return m_start;    }
+        const int16* weight_array() const { return &m_weight_array[0]; }
+        void         normalize();
+
+    private:
+        void realloc_lut(double radius);
+        image_filter_lut(const image_filter_lut&);
+        const image_filter_lut& operator = (const image_filter_lut&);
+
+        double           m_radius;
+        unsigned         m_diameter;
+        int              m_start;
+        pod_array<int16> m_weight_array;
+    };
+
+
+
+    //--------------------------------------------------------image_filter
+    template<class FilterF> class image_filter : public image_filter_lut
+    {
+    public:
+        image_filter()
+        {
+            calculate(m_filter_function);
+        }
+    private:
+        FilterF m_filter_function;
+    };
+
+
+    //-----------------------------------------------image_filter_bilinear
+    struct image_filter_bilinear
+    {
+        static double radius() { return 1.0; }
+        static double calc_weight(double x)
+        {
+            return 1.0 - x;
+        }
+    };
+
+
+    //-----------------------------------------------image_filter_hanning
+    struct image_filter_hanning
+    {
+        static double radius() { return 1.0; }
+        static double calc_weight(double x)
+        {
+            return 0.5 + 0.5 * std::cos(pi * x);
+        }
+    };
+
+
+    //-----------------------------------------------image_filter_hamming
+    struct image_filter_hamming
+    {
+        static double radius() { return 1.0; }
+        static double calc_weight(double x)
+        {
+            return 0.54 + 0.46 * std::cos(pi * x);
+        }
+    };
+
+    //-----------------------------------------------image_filter_hermite
+    struct image_filter_hermite
+    {
+        static double radius() { return 1.0; }
+        static double calc_weight(double x)
+        {
+            return (2.0 * x - 3.0) * x * x + 1.0;
+        }
+    };
+   
+    //------------------------------------------------image_filter_quadric
+    struct image_filter_quadric
+    {
+        static double radius() { return 1.5; }
+        static double calc_weight(double x)
+        {
+            double t;
+            if(x <  0.5) return 0.75 - x * x;
+            if(x <  1.5) {t = x - 1.5; return 0.5 * t * t;}
+            return 0.0;
+        }
+    };
+
+    //------------------------------------------------image_filter_bicubic
+    class image_filter_bicubic
+    {
+        static double pow3(double x)
+        {
+            return (x <= 0.0) ? 0.0 : x * x * x;
+        }
+
+    public:
+        static double radius() { return 2.0; }
+        static double calc_weight(double x)
+        {
+            return
+                (1.0/6.0) * 
+                (pow3(x + 2) - 4 * pow3(x + 1) + 6 * pow3(x) - 4 * pow3(x - 1));
+        }
+    };
+
+    //-------------------------------------------------image_filter_kaiser
+    class image_filter_kaiser
+    {
+        double a;
+        double i0a;
+        double epsilon;
+
+    public:
+        image_filter_kaiser(double b = 6.33) :
+            a(b), epsilon(1e-12)
+        {
+            i0a = 1.0 / bessel_i0(b);
+        }
+
+        static double radius() { return 1.0; }
+        double calc_weight(double x) const
+        {
+            return bessel_i0(a * std::sqrt(1. - x * x)) * i0a;
+        }
+
+    private:
+        double bessel_i0(double x) const
+        {
+            int i;
+            double sum, y, t;
+
+            sum = 1.;
+            y = x * x / 4.;
+            t = y;
+        
+            for(i = 2; t > epsilon; i++)
+            {
+                sum += t;
+                t *= (double)y / (i * i);
+            }
+            return sum;
+        }
+    };
+
+    //----------------------------------------------image_filter_catrom
+    struct image_filter_catrom
+    {
+        static double radius() { return 2.0; }
+        static double calc_weight(double x)
+        {
+            if(x <  1.0) return 0.5 * (2.0 + x * x * (-5.0 + x * 3.0));
+            if(x <  2.0) return 0.5 * (4.0 + x * (-8.0 + x * (5.0 - x)));
+            return 0.;
+        }
+    };
+
+    //---------------------------------------------image_filter_mitchell
+    class image_filter_mitchell
+    {
+        double p0, p2, p3;
+        double q0, q1, q2, q3;
+
+    public:
+        image_filter_mitchell(double b = 1.0/3.0, double c = 1.0/3.0) :
+            p0((6.0 - 2.0 * b) / 6.0),
+            p2((-18.0 + 12.0 * b + 6.0 * c) / 6.0),
+            p3((12.0 - 9.0 * b - 6.0 * c) / 6.0),
+            q0((8.0 * b + 24.0 * c) / 6.0),
+            q1((-12.0 * b - 48.0 * c) / 6.0),
+            q2((6.0 * b + 30.0 * c) / 6.0),
+            q3((-b - 6.0 * c) / 6.0)
+        {}
+
+        static double radius() { return 2.0; }
+        double calc_weight(double x) const
+        {
+            if(x < 1.0) return p0 + x * x * (p2 + x * p3);
+            if(x < 2.0) return q0 + x * (q1 + x * (q2 + x * q3));
+            return 0.0;
+        }
+    };
+
+
+    //----------------------------------------------image_filter_spline16
+    struct image_filter_spline16
+    {
+        static double radius() { return 2.0; }
+        static double calc_weight(double x)
+        {
+            if(x < 1.0)
+            {
+                return ((x - 9.0/5.0 ) * x - 1.0/5.0 ) * x + 1.0;
+            }
+            return ((-1.0/3.0 * (x-1) + 4.0/5.0) * (x-1) - 7.0/15.0 ) * (x-1);
+        }
+    };
+
+
+    //---------------------------------------------image_filter_spline36
+    struct image_filter_spline36
+    {
+        static double radius() { return 3.0; }
+        static double calc_weight(double x)
+        {
+           if(x < 1.0)
+           {
+              return ((13.0/11.0 * x - 453.0/209.0) * x - 3.0/209.0) * x + 1.0;
+           }
+           if(x < 2.0)
+           {
+              return ((-6.0/11.0 * (x-1) + 270.0/209.0) * (x-1) - 156.0/ 209.0) * (x-1);
+           }
+           return ((1.0/11.0 * (x-2) - 45.0/209.0) * (x-2) +  26.0/209.0) * (x-2);
+        }
+    };
+
+
+    //----------------------------------------------image_filter_gaussian
+    struct image_filter_gaussian
+    {
+        static double radius() { return 2.0; }
+        static double calc_weight(double x) 
+        {
+            return std::exp(-2.0 * x * x) * std::sqrt(2.0 / pi);
+        }
+    };
+
+
+    //------------------------------------------------image_filter_bessel
+    struct image_filter_bessel
+    {
+        static double radius() { return 3.2383; } 
+        static double calc_weight(double x)
+        {
+            return (x == 0.0) ? pi / 4.0 : besj(pi * x, 1) / (2.0 * x);
+        }
+    };
+
+
+    //-------------------------------------------------image_filter_sinc
+    class image_filter_sinc
+    {
+    public:
+        image_filter_sinc(double r) : m_radius(r < 2.0 ? 2.0 : r) {}
+        double radius() const { return m_radius; }
+        double calc_weight(double x) const
+        {
+            if(x == 0.0) return 1.0;
+            x *= pi;
+            return std::sin(x) / x;
+        }
+    private:
+        double m_radius;
+    };
+
+
+    //-----------------------------------------------image_filter_lanczos
+    class image_filter_lanczos
+    {
+    public:
+        image_filter_lanczos(double r) : m_radius(r < 2.0 ? 2.0 : r) {}
+        double radius() const { return m_radius; }
+        double calc_weight(double x) const
+        {
+           if(x == 0.0) return 1.0;
+           if(x > m_radius) return 0.0;
+           x *= pi;
+           double xr = x / m_radius;
+           return (std::sin(x) / x) * (std::sin(xr) / xr);
+        }
+    private:
+        double m_radius;
+    };
+
+
+    //----------------------------------------------image_filter_blackman
+    class image_filter_blackman
+    {
+    public:
+        image_filter_blackman(double r) : m_radius(r < 2.0 ? 2.0 : r) {}
+        double radius() const { return m_radius; }
+        double calc_weight(double x) const
+        {
+           if(x == 0.0) return 1.0;
+           if(x > m_radius) return 0.0;
+           x *= pi;
+           double xr = x / m_radius;
+           return (std::sin(x) / x) * (0.42 + 0.5*std::cos(xr) + 0.08*std::cos(2*xr));
+        }
+    private:
+        double m_radius;
+    };
+
+    //------------------------------------------------image_filter_sinc36
+    class image_filter_sinc36 : public image_filter_sinc
+    { public: image_filter_sinc36() : image_filter_sinc(3.0){} };
+
+    //------------------------------------------------image_filter_sinc64
+    class image_filter_sinc64 : public image_filter_sinc
+    { public: image_filter_sinc64() : image_filter_sinc(4.0){} };
+
+    //-----------------------------------------------image_filter_sinc100
+    class image_filter_sinc100 : public image_filter_sinc
+    { public: image_filter_sinc100() : image_filter_sinc(5.0){} };
+
+    //-----------------------------------------------image_filter_sinc144
+    class image_filter_sinc144 : public image_filter_sinc
+    { public: image_filter_sinc144() : image_filter_sinc(6.0){} };
+
+    //-----------------------------------------------image_filter_sinc196
+    class image_filter_sinc196 : public image_filter_sinc
+    { public: image_filter_sinc196() : image_filter_sinc(7.0){} };
+
+    //-----------------------------------------------image_filter_sinc256
+    class image_filter_sinc256 : public image_filter_sinc
+    { public: image_filter_sinc256() : image_filter_sinc(8.0){} };
+
+    //---------------------------------------------image_filter_lanczos36
+    class image_filter_lanczos36 : public image_filter_lanczos
+    { public: image_filter_lanczos36() : image_filter_lanczos(3.0){} };
+
+    //---------------------------------------------image_filter_lanczos64
+    class image_filter_lanczos64 : public image_filter_lanczos
+    { public: image_filter_lanczos64() : image_filter_lanczos(4.0){} };
+
+    //--------------------------------------------image_filter_lanczos100
+    class image_filter_lanczos100 : public image_filter_lanczos
+    { public: image_filter_lanczos100() : image_filter_lanczos(5.0){} };
+
+    //--------------------------------------------image_filter_lanczos144
+    class image_filter_lanczos144 : public image_filter_lanczos
+    { public: image_filter_lanczos144() : image_filter_lanczos(6.0){} };
+
+    //--------------------------------------------image_filter_lanczos196
+    class image_filter_lanczos196 : public image_filter_lanczos
+    { public: image_filter_lanczos196() : image_filter_lanczos(7.0){} };
+
+    //--------------------------------------------image_filter_lanczos256
+    class image_filter_lanczos256 : public image_filter_lanczos
+    { public: image_filter_lanczos256() : image_filter_lanczos(8.0){} };
+
+    //--------------------------------------------image_filter_blackman36
+    class image_filter_blackman36 : public image_filter_blackman
+    { public: image_filter_blackman36() : image_filter_blackman(3.0){} };
+
+    //--------------------------------------------image_filter_blackman64
+    class image_filter_blackman64 : public image_filter_blackman
+    { public: image_filter_blackman64() : image_filter_blackman(4.0){} };
+
+    //-------------------------------------------image_filter_blackman100
+    class image_filter_blackman100 : public image_filter_blackman
+    { public: image_filter_blackman100() : image_filter_blackman(5.0){} };
+
+    //-------------------------------------------image_filter_blackman144
+    class image_filter_blackman144 : public image_filter_blackman
+    { public: image_filter_blackman144() : image_filter_blackman(6.0){} };
+
+    //-------------------------------------------image_filter_blackman196
+    class image_filter_blackman196 : public image_filter_blackman
+    { public: image_filter_blackman196() : image_filter_blackman(7.0){} };
+
+    //-------------------------------------------image_filter_blackman256
+    class image_filter_blackman256 : public image_filter_blackman
+    { public: image_filter_blackman256() : image_filter_blackman(8.0){} };
+
+
+}
+
+#endif
--- a/dep/agg/include/agg_line_aa_basics.h
+++ b/dep/agg/include/agg_line_aa_basics.h
@@ -0,0 +1,189 @@
+//----------------------------------------------------------------------------
+// Anti-Grain Geometry - Version 2.4
+// Copyright (C) 2002-2005 Maxim Shemanarev (http://www.antigrain.com)
+//
+// Permission to copy, use, modify, sell and distribute this software 
+// is granted provided this copyright notice appears in all copies. 
+// This software is provided "as is" without express or implied
+// warranty, and with no claim as to its suitability for any purpose.
+//
+//----------------------------------------------------------------------------
+// Contact: mcseem@antigrain.com
+//          mcseemagg@yahoo.com
+//          http://www.antigrain.com
+//----------------------------------------------------------------------------
+#ifndef AGG_LINE_AA_BASICS_INCLUDED
+#define AGG_LINE_AA_BASICS_INCLUDED
+
+#include <cstdlib>
+#include "agg_basics.h"
+
+namespace agg
+{
+
+    // See Implementation agg_line_aa_basics.cpp 
+
+    //-------------------------------------------------------------------------
+    enum line_subpixel_scale_e
+    {
+        line_subpixel_shift = 8,                          //----line_subpixel_shift
+        line_subpixel_scale  = 1 << line_subpixel_shift,  //----line_subpixel_scale
+        line_subpixel_mask  = line_subpixel_scale - 1,    //----line_subpixel_mask
+        line_max_coord      = (1 << 28) - 1,              //----line_max_coord
+        line_max_length = 1 << (line_subpixel_shift + 10) //----line_max_length
+    };
+
+    //-------------------------------------------------------------------------
+    enum line_mr_subpixel_scale_e
+    {
+        line_mr_subpixel_shift = 4,                           //----line_mr_subpixel_shift
+        line_mr_subpixel_scale = 1 << line_mr_subpixel_shift, //----line_mr_subpixel_scale 
+        line_mr_subpixel_mask  = line_mr_subpixel_scale - 1   //----line_mr_subpixel_mask 
+    };
+
+    //------------------------------------------------------------------line_mr
+    AGG_INLINE int line_mr(int x) 
+    { 
+        return x >> (line_subpixel_shift - line_mr_subpixel_shift); 
+    }
+
+    //-------------------------------------------------------------------line_hr
+    AGG_INLINE int line_hr(int x) 
+    { 
+        return x << (line_subpixel_shift - line_mr_subpixel_shift); 
+    }
+
+    //---------------------------------------------------------------line_dbl_hr
+    AGG_INLINE int line_dbl_hr(int x) 
+    { 
+        return x << line_subpixel_shift;
+    }
+
+    //---------------------------------------------------------------line_coord
+    struct line_coord
+    {
+        AGG_INLINE static int conv(double x)
+        {
+            return iround(x * line_subpixel_scale);
+        }
+    };
+
+    //-----------------------------------------------------------line_coord_sat
+    struct line_coord_sat
+    {
+        AGG_INLINE static int conv(double x)
+        {
+            return saturation<line_max_coord>::iround(x * line_subpixel_scale);
+        }
+    };
+
+    //==========================================================line_parameters
+    struct line_parameters
+    {
+        //---------------------------------------------------------------------
+        line_parameters() {}
+        line_parameters(int x1_, int y1_, int x2_, int y2_, int len_) :
+            x1(x1_), y1(y1_), x2(x2_), y2(y2_), 
+            dx(std::abs(x2_ - x1_)),
+            dy(std::abs(y2_ - y1_)),
+            sx((x2_ > x1_) ? 1 : -1),
+            sy((y2_ > y1_) ? 1 : -1),
+            vertical(dy >= dx),
+            inc(vertical ? sy : sx),
+            len(len_),
+            octant((sy & 4) | (sx & 2) | int(vertical))
+        {
+        }
+
+        //---------------------------------------------------------------------
+        unsigned orthogonal_quadrant() const { return s_orthogonal_quadrant[octant]; }
+        unsigned diagonal_quadrant()   const { return s_diagonal_quadrant[octant];   }
+
+        //---------------------------------------------------------------------
+        bool same_orthogonal_quadrant(const line_parameters& lp) const
+        {
+            return s_orthogonal_quadrant[octant] == s_orthogonal_quadrant[lp.octant];
+        }
+
+        //---------------------------------------------------------------------
+        bool same_diagonal_quadrant(const line_parameters& lp) const
+        {
+            return s_diagonal_quadrant[octant] == s_diagonal_quadrant[lp.octant];
+        }
+
+        //---------------------------------------------------------------------
+        void divide(line_parameters& lp1, line_parameters& lp2) const
+        {
+            int xmid = (x1 + x2) >> 1;
+            int ymid = (y1 + y2) >> 1;
+            int len2 = len >> 1;
+
+            lp1 = *this;
+            lp2 = *this;
+
+            lp1.x2  = xmid;
+            lp1.y2  = ymid;
+            lp1.len = len2;
+            lp1.dx  = std::abs(lp1.x2 - lp1.x1);
+            lp1.dy  = std::abs(lp1.y2 - lp1.y1);
+
+            lp2.x1  = xmid;
+            lp2.y1  = ymid;
+            lp2.len = len2;
+            lp2.dx  = std::abs(lp2.x2 - lp2.x1);
+            lp2.dy  = std::abs(lp2.y2 - lp2.y1);
+        }
+        
+        //---------------------------------------------------------------------
+        int x1, y1, x2, y2, dx, dy, sx, sy;
+        bool vertical;
+        int inc;
+        int len;
+        int octant;
+
+        //---------------------------------------------------------------------
+        static const int8u s_orthogonal_quadrant[8];
+        static const int8u s_diagonal_quadrant[8];
+    };
+
+
+
+    // See Implementation agg_line_aa_basics.cpp 
+
+    //----------------------------------------------------------------bisectrix
+    void bisectrix(const line_parameters& l1, 
+                   const line_parameters& l2, 
+                   int* x, int* y);
+
+
+    //-------------------------------------------fix_degenerate_bisectrix_start
+    void inline fix_degenerate_bisectrix_start(const line_parameters& lp, 
+                                               int* x, int* y)
+    {
+        int d = iround((double(*x - lp.x2) * double(lp.y2 - lp.y1) - 
+                        double(*y - lp.y2) * double(lp.x2 - lp.x1)) / lp.len);
+        if(d < line_subpixel_scale/2)
+        {
+            *x = lp.x1 + (lp.y2 - lp.y1);
+            *y = lp.y1 - (lp.x2 - lp.x1);
+        }
+    }
+
+
+    //---------------------------------------------fix_degenerate_bisectrix_end
+    void inline fix_degenerate_bisectrix_end(const line_parameters& lp, 
+                                             int* x, int* y)
+    {
+        int d = iround((double(*x - lp.x2) * double(lp.y2 - lp.y1) - 
+                        double(*y - lp.y2) * double(lp.x2 - lp.x1)) / lp.len);
+        if(d < line_subpixel_scale/2)
+        {
+            *x = lp.x2 + (lp.y2 - lp.y1);
+            *y = lp.y2 - (lp.x2 - lp.x1);
+        }
+    }
+
+
+}
+
+#endif
--- a/dep/agg/include/agg_math.h
+++ b/dep/agg/include/agg_math.h
@@ -0,0 +1,437 @@
+//----------------------------------------------------------------------------
+// Anti-Grain Geometry - Version 2.4
+// Copyright (C) 2002-2005 Maxim Shemanarev (http://www.antigrain.com)
+//
+// Permission to copy, use, modify, sell and distribute this software 
+// is granted provided this copyright notice appears in all copies. 
+// This software is provided "as is" without express or implied
+// warranty, and with no claim as to its suitability for any purpose.
+//
+//----------------------------------------------------------------------------
+// Contact: mcseem@antigrain.com
+//          mcseemagg@yahoo.com
+//          http://www.antigrain.com
+//----------------------------------------------------------------------------
+// Bessel function (besj) was adapted for use in AGG library by Andy Wilk 
+// Contact: castor.vulgaris@gmail.com
+//----------------------------------------------------------------------------
+
+#ifndef AGG_MATH_INCLUDED
+#define AGG_MATH_INCLUDED
+
+#include <cmath>
+#include "agg_basics.h"
+
+namespace agg
+{
+
+    //------------------------------------------------------vertex_dist_epsilon
+    // Coinciding points maximal distance (Epsilon)
+    const double vertex_dist_epsilon = 1e-14;
+
+    //-----------------------------------------------------intersection_epsilon
+    // See calc_intersection
+    const double intersection_epsilon = 1.0e-30;
+
+    //------------------------------------------------------------cross_product
+    AGG_INLINE double cross_product(double x1, double y1, 
+                                    double x2, double y2, 
+                                    double x,  double y)
+    {
+        return (x - x2) * (y2 - y1) - (y - y2) * (x2 - x1);
+    }
+
+    //--------------------------------------------------------point_in_triangle
+    AGG_INLINE bool point_in_triangle(double x1, double y1, 
+                                      double x2, double y2, 
+                                      double x3, double y3, 
+                                      double x,  double y)
+    {
+        bool cp1 = cross_product(x1, y1, x2, y2, x, y) < 0.0;
+        bool cp2 = cross_product(x2, y2, x3, y3, x, y) < 0.0;
+        bool cp3 = cross_product(x3, y3, x1, y1, x, y) < 0.0;
+        return cp1 == cp2 && cp2 == cp3 && cp3 == cp1;
+    }
+
+    //-----------------------------------------------------------calc_distance
+    AGG_INLINE double calc_distance(double x1, double y1, double x2, double y2)
+    {
+        double dx = x2-x1;
+        double dy = y2-y1;
+        return std::sqrt(dx * dx + dy * dy);
+    }
+
+    //--------------------------------------------------------calc_sq_distance
+    AGG_INLINE double calc_sq_distance(double x1, double y1, double x2, double y2)
+    {
+        double dx = x2-x1;
+        double dy = y2-y1;
+        return dx * dx + dy * dy;
+    }
+
+    //------------------------------------------------calc_line_point_distance
+    AGG_INLINE double calc_line_point_distance(double x1, double y1, 
+                                               double x2, double y2, 
+                                               double x,  double y)
+    {
+        double dx = x2-x1;
+        double dy = y2-y1;
+        double d = std::sqrt(dx * dx + dy * dy);
+        if(d < vertex_dist_epsilon)
+        {
+            return calc_distance(x1, y1, x, y);
+        }
+        return ((x - x2) * dy - (y - y2) * dx) / d;
+    }
+
+    //-------------------------------------------------------calc_line_point_u
+    AGG_INLINE double calc_segment_point_u(double x1, double y1, 
+                                           double x2, double y2, 
+                                           double x,  double y)
+    {
+        double dx = x2 - x1;
+        double dy = y2 - y1;
+
+        if(dx == 0 && dy == 0)
+        {
+	        return 0;
+        }
+
+        double pdx = x - x1;
+        double pdy = y - y1;
+
+        return (pdx * dx + pdy * dy) / (dx * dx + dy * dy);
+    }
+
+    //---------------------------------------------calc_line_point_sq_distance
+    AGG_INLINE double calc_segment_point_sq_distance(double x1, double y1, 
+                                                     double x2, double y2, 
+                                                     double x,  double y,
+                                                     double u)
+    {
+        if(u <= 0)
+        {
+	        return calc_sq_distance(x, y, x1, y1);
+        }
+        else 
+        if(u >= 1)
+        {
+	        return calc_sq_distance(x, y, x2, y2);
+        }
+        return calc_sq_distance(x, y, x1 + u * (x2 - x1), y1 + u * (y2 - y1));
+    }
+
+    //---------------------------------------------calc_line_point_sq_distance
+    AGG_INLINE double calc_segment_point_sq_distance(double x1, double y1, 
+                                                     double x2, double y2, 
+                                                     double x,  double y)
+    {
+        return 
+            calc_segment_point_sq_distance(
+                x1, y1, x2, y2, x, y,
+                calc_segment_point_u(x1, y1, x2, y2, x, y));
+    }
+
+    //-------------------------------------------------------calc_intersection
+    AGG_INLINE bool calc_intersection(double ax, double ay, double bx, double by,
+                                      double cx, double cy, double dx, double dy,
+                                      double* x, double* y)
+    {
+        double num = (ay-cy) * (dx-cx) - (ax-cx) * (dy-cy);
+        double den = (bx-ax) * (dy-cy) - (by-ay) * (dx-cx);
+        if(std::fabs(den) < intersection_epsilon) return false;
+        double r = num / den;
+        *x = ax + r * (bx-ax);
+        *y = ay + r * (by-ay);
+        return true;
+    }
+
+    //-----------------------------------------------------intersection_exists
+    AGG_INLINE bool intersection_exists(double x1, double y1, double x2, double y2,
+                                        double x3, double y3, double x4, double y4)
+    {
+        // It's less expensive but you can't control the 
+        // boundary conditions: Less or LessEqual
+        double dx1 = x2 - x1;
+        double dy1 = y2 - y1;
+        double dx2 = x4 - x3;
+        double dy2 = y4 - y3;
+        return ((x3 - x2) * dy1 - (y3 - y2) * dx1 < 0.0) != 
+               ((x4 - x2) * dy1 - (y4 - y2) * dx1 < 0.0) &&
+               ((x1 - x4) * dy2 - (y1 - y4) * dx2 < 0.0) !=
+               ((x2 - x4) * dy2 - (y2 - y4) * dx2 < 0.0);
+
+        // It's is more expensive but more flexible 
+        // in terms of boundary conditions.
+        //--------------------
+        //double den  = (x2-x1) * (y4-y3) - (y2-y1) * (x4-x3);
+        //if(fabs(den) < intersection_epsilon) return false;
+        //double nom1 = (x4-x3) * (y1-y3) - (y4-y3) * (x1-x3);
+        //double nom2 = (x2-x1) * (y1-y3) - (y2-y1) * (x1-x3);
+        //double ua = nom1 / den;
+        //double ub = nom2 / den;
+        //return ua >= 0.0 && ua <= 1.0 && ub >= 0.0 && ub <= 1.0;
+    }
+
+    //--------------------------------------------------------calc_orthogonal
+    AGG_INLINE void calc_orthogonal(double thickness,
+                                    double x1, double y1,
+                                    double x2, double y2,
+                                    double* x, double* y)
+    {
+        double dx = x2 - x1;
+        double dy = y2 - y1;
+        double d = std::sqrt(dx*dx + dy*dy); 
+        *x =  thickness * dy / d;
+        *y = -thickness * dx / d;
+    }
+
+    //--------------------------------------------------------dilate_triangle
+    AGG_INLINE void dilate_triangle(double x1, double y1,
+                                    double x2, double y2,
+                                    double x3, double y3,
+                                    double *x, double* y,
+                                    double d)
+    {
+        double dx1=0.0;
+        double dy1=0.0; 
+        double dx2=0.0;
+        double dy2=0.0; 
+        double dx3=0.0;
+        double dy3=0.0; 
+        double loc = cross_product(x1, y1, x2, y2, x3, y3);
+        if(std::fabs(loc) > intersection_epsilon)
+        {
+            if(cross_product(x1, y1, x2, y2, x3, y3) > 0.0) 
+            {
+                d = -d;
+            }
+            calc_orthogonal(d, x1, y1, x2, y2, &dx1, &dy1);
+            calc_orthogonal(d, x2, y2, x3, y3, &dx2, &dy2);
+            calc_orthogonal(d, x3, y3, x1, y1, &dx3, &dy3);
+        }
+        *x++ = x1 + dx1;  *y++ = y1 + dy1;
+        *x++ = x2 + dx1;  *y++ = y2 + dy1;
+        *x++ = x2 + dx2;  *y++ = y2 + dy2;
+        *x++ = x3 + dx2;  *y++ = y3 + dy2;
+        *x++ = x3 + dx3;  *y++ = y3 + dy3;
+        *x++ = x1 + dx3;  *y++ = y1 + dy3;
+    }
+
+    //------------------------------------------------------calc_triangle_area
+    AGG_INLINE double calc_triangle_area(double x1, double y1,
+                                         double x2, double y2,
+                                         double x3, double y3)
+    {
+        return (x1*y2 - x2*y1 + x2*y3 - x3*y2 + x3*y1 - x1*y3) * 0.5;
+    }
+
+    //-------------------------------------------------------calc_polygon_area
+    template<class Storage> double calc_polygon_area(const Storage& st)
+    {
+        unsigned i;
+        double sum = 0.0;
+        double x  = st[0].x;
+        double y  = st[0].y;
+        double xs = x;
+        double ys = y;
+
+        for(i = 1; i < st.size(); i++)
+        {
+            const typename Storage::value_type& v = st[i];
+            sum += x * v.y - y * v.x;
+            x = v.x;
+            y = v.y;
+        }
+        return (sum + x * ys - y * xs) * 0.5;
+    }
+
+    //------------------------------------------------------------------------
+    // Tables for fast sqrt
+    extern int16u g_sqrt_table[1024];
+    extern int8   g_elder_bit_table[256];
+
+
+    //---------------------------------------------------------------fast_sqrt
+    //Fast integer Sqrt - really fast: no cycles, divisions or multiplications
+    #if defined(_MSC_VER)
+    #pragma warning(push)
+    #pragma warning(disable : 4035) //Disable warning "no return value"
+    #endif
+    AGG_INLINE unsigned fast_sqrt(unsigned val)
+    {
+    #if defined(_M_IX86) && defined(_MSC_VER) && !defined(AGG_NO_ASM)
+        //For Ix86 family processors this assembler code is used. 
+        //The key command here is bsr - determination the number of the most 
+        //significant bit of the value. For other processors
+        //(and maybe compilers) the pure C "#else" section is used.
+        __asm
+        {
+            mov ebx, val
+            mov edx, 11
+            bsr ecx, ebx
+            sub ecx, 9
+            jle less_than_9_bits
+            shr ecx, 1
+            adc ecx, 0
+            sub edx, ecx
+            shl ecx, 1
+            shr ebx, cl
+    less_than_9_bits:
+            xor eax, eax
+            mov  ax, g_sqrt_table[ebx*2]
+            mov ecx, edx
+            shr eax, cl
+        }
+    #else
+
+        //This code is actually pure C and portable to most 
+        //arcitectures including 64bit ones. 
+        unsigned t = val;
+        int bit=0;
+        unsigned shift = 11;
+
+        //The following piece of code is just an emulation of the
+        //Ix86 assembler command "bsr" (see above). However on old
+        //Intels (like Intel MMX 233MHz) this code is about twice 
+        //faster (sic!) then just one "bsr". On PIII and PIV the
+        //bsr is optimized quite well.
+        bit = t >> 24;
+        if(bit)
+        {
+            bit = g_elder_bit_table[bit] + 24;
+        }
+        else
+        {
+            bit = (t >> 16) & 0xFF;
+            if(bit)
+            {
+                bit = g_elder_bit_table[bit] + 16;
+            }
+            else
+            {
+                bit = (t >> 8) & 0xFF;
+                if(bit)
+                {
+                    bit = g_elder_bit_table[bit] + 8;
+                }
+                else
+                {
+                    bit = g_elder_bit_table[t];
+                }
+            }
+        }
+
+        //This code calculates the sqrt.
+        bit -= 9;
+        if(bit > 0)
+        {
+            bit = (bit >> 1) + (bit & 1);
+            shift -= bit;
+            val >>= (bit << 1);
+        }
+        return g_sqrt_table[val] >> shift;
+    #endif
+    }
+    #if defined(_MSC_VER)
+    #pragma warning(pop)
+    #endif
+
+
+
+
+    //--------------------------------------------------------------------besj
+    // Function BESJ calculates Bessel function of first kind of order n
+    // Arguments:
+    //     n - an integer (>=0), the order
+    //     x - value at which the Bessel function is required
+    //--------------------
+    // C++ Mathematical Library
+    // Convereted from equivalent FORTRAN library
+    // Converetd by Gareth Walker for use by course 392 computational project
+    // All functions tested and yield the same results as the corresponding
+    // FORTRAN versions.
+    //
+    // If you have any problems using these functions please report them to
+    // M.Muldoon@UMIST.ac.uk
+    //
+    // Documentation available on the web
+    // http://www.ma.umist.ac.uk/mrm/Teaching/392/libs/392.html
+    // Version 1.0   8/98
+    // 29 October, 1999
+    //--------------------
+    // Adapted for use in AGG library by Andy Wilk (castor.vulgaris@gmail.com)
+    //------------------------------------------------------------------------
+    inline double besj(double x, int n)
+    {
+        if(n < 0)
+        {
+            return 0;
+        }
+        double d = 1E-6;
+        double b = 0;
+        if(std::fabs(x) <= d) 
+        {
+            if(n != 0) return 0;
+            return 1;
+        }
+        double b1 = 0; // b1 is the value from the previous iteration
+        // Set up a starting order for recurrence
+        int m1 = (int)std::fabs(x) + 6;
+        if(std::fabs(x) > 5) 
+        {
+            m1 = (int)(std::fabs(1.4 * x + 60 / x));
+        }
+        int m2 = (int)(n + 2 + std::fabs(x) / 4);
+        if (m1 > m2) 
+        {
+            m2 = m1;
+        }
+    
+        // Apply recurrence down from curent max order
+        for(;;) 
+        {
+            double c3 = 0;
+            double c2 = 1E-30;
+            double c4 = 0;
+            int m8 = 1;
+            if (m2 / 2 * 2 == m2) 
+            {
+                m8 = -1;
+            }
+            int imax = m2 - 2;
+            for (int i = 1; i <= imax; i++) 
+            {
+                double c6 = 2 * (m2 - i) * c2 / x - c3;
+                c3 = c2;
+                c2 = c6;
+                if(m2 - i - 1 == n)
+                {
+                    b = c6;
+                }
+                m8 = -1 * m8;
+                if (m8 > 0)
+                {
+                    c4 = c4 + 2 * c6;
+                }
+            }
+            double c6 = 2 * c2 / x - c3;
+            if(n == 0)
+            {
+                b = c6;
+            }
+            c4 += c6;
+            b /= c4;
+            if(std::fabs(b - b1) < d)
+            {
+                return b;
+            }
+            b1 = b;
+            m2 += 3;
+        }
+    }
+
+}
+
+
+#endif
--- a/dep/agg/include/agg_math_stroke.h
+++ b/dep/agg/include/agg_math_stroke.h
@@ -0,0 +1,526 @@
+//----------------------------------------------------------------------------
+// Anti-Grain Geometry - Version 2.4
+// Copyright (C) 2002-2005 Maxim Shemanarev (http://www.antigrain.com)
+//
+// Permission to copy, use, modify, sell and distribute this software 
+// is granted provided this copyright notice appears in all copies. 
+// This software is provided "as is" without express or implied
+// warranty, and with no claim as to its suitability for any purpose.
+//
+//----------------------------------------------------------------------------
+// Contact: mcseem@antigrain.com
+//          mcseemagg@yahoo.com
+//          http://www.antigrain.com
+//----------------------------------------------------------------------------
+//
+// Stroke math
+//
+//----------------------------------------------------------------------------
+
+#ifndef AGG_STROKE_MATH_INCLUDED
+#define AGG_STROKE_MATH_INCLUDED
+
+#include "agg_math.h"
+#include "agg_vertex_sequence.h"
+
+namespace agg
+{
+    //-------------------------------------------------------------line_cap_e
+    enum line_cap_e
+    {
+        butt_cap,
+        square_cap,
+        round_cap
+    };
+
+    //------------------------------------------------------------line_join_e
+    enum line_join_e
+    {
+        miter_join         = 0,
+        miter_join_revert  = 1,
+        round_join         = 2,
+        bevel_join         = 3,
+        miter_join_round   = 4
+    };
+
+
+    //-----------------------------------------------------------inner_join_e
+    enum inner_join_e
+    {
+        inner_bevel,
+        inner_miter,
+        inner_jag,
+        inner_round
+    };
+
+    //------------------------------------------------------------math_stroke
+    template<class VertexConsumer> class math_stroke
+    {
+    public:
+        typedef typename VertexConsumer::value_type coord_type;
+
+        math_stroke();
+
+        void line_cap(line_cap_e lc)     { m_line_cap = lc; }
+        void line_join(line_join_e lj)   { m_line_join = lj; }
+        void inner_join(inner_join_e ij) { m_inner_join = ij; }
+
+        line_cap_e   line_cap()   const { return m_line_cap; }
+        line_join_e  line_join()  const { return m_line_join; }
+        inner_join_e inner_join() const { return m_inner_join; }
+
+        void width(double w);
+        void miter_limit(double ml) { m_miter_limit = ml; }
+        void miter_limit_theta(double t);
+        void inner_miter_limit(double ml) { m_inner_miter_limit = ml; }
+        void approximation_scale(double as) { m_approx_scale = as; }
+
+        double width() const { return m_width * 2.0; }
+        double miter_limit() const { return m_miter_limit; }
+        double inner_miter_limit() const { return m_inner_miter_limit; }
+        double approximation_scale() const { return m_approx_scale; }
+
+        void calc_cap(VertexConsumer& vc,
+                      const vertex_dist& v0, 
+                      const vertex_dist& v1, 
+                      double len);
+
+        void calc_join(VertexConsumer& vc,
+                       const vertex_dist& v0, 
+                       const vertex_dist& v1, 
+                       const vertex_dist& v2,
+                       double len1, 
+                       double len2);
+
+    private:
+        AGG_INLINE void add_vertex(VertexConsumer& vc, double x, double y)
+        {
+            vc.add(coord_type(x, y));
+        }
+
+        void calc_arc(VertexConsumer& vc,
+                      double x,   double y, 
+                      double dx1, double dy1, 
+                      double dx2, double dy2);
+
+        void calc_miter(VertexConsumer& vc,
+                        const vertex_dist& v0, 
+                        const vertex_dist& v1, 
+                        const vertex_dist& v2,
+                        double dx1, double dy1, 
+                        double dx2, double dy2,
+                        line_join_e lj,
+                        double mlimit,
+                        double dbevel);
+
+        double       m_width;
+        double       m_width_abs;
+        double       m_width_eps;
+        int          m_width_sign;
+        double       m_miter_limit;
+        double       m_inner_miter_limit;
+        double       m_approx_scale;
+        line_cap_e   m_line_cap;
+        line_join_e  m_line_join;
+        inner_join_e m_inner_join;
+    };
+
+    //-----------------------------------------------------------------------
+    template<class VC> math_stroke<VC>::math_stroke() :
+        m_width(0.5),
+        m_width_abs(0.5),
+        m_width_eps(0.5/1024.0),
+        m_width_sign(1),
+        m_miter_limit(4.0),
+        m_inner_miter_limit(1.01),
+        m_approx_scale(1.0),
+        m_line_cap(butt_cap),
+        m_line_join(miter_join),
+        m_inner_join(inner_miter)
+    {
+    }
+
+    //-----------------------------------------------------------------------
+    template<class VC> void math_stroke<VC>::width(double w)
+    { 
+        m_width = w * 0.5; 
+        if(m_width < 0)
+        {
+            m_width_abs  = -m_width;
+            m_width_sign = -1;
+        }
+        else
+        {
+            m_width_abs  = m_width;
+            m_width_sign = 1;
+        }
+        m_width_eps = m_width / 1024.0;
+    }
+
+    //-----------------------------------------------------------------------
+    template<class VC> void math_stroke<VC>::miter_limit_theta(double t)
+    { 
+        m_miter_limit = 1.0 / std::sin(t * 0.5) ;
+    }
+
+    //-----------------------------------------------------------------------
+    template<class VC> 
+    void math_stroke<VC>::calc_arc(VC& vc,
+                                   double x,   double y, 
+                                   double dx1, double dy1, 
+                                   double dx2, double dy2)
+    {
+        double a1 = std::atan2(dy1 * m_width_sign, dx1 * m_width_sign);
+        double a2 = std::atan2(dy2 * m_width_sign, dx2 * m_width_sign);
+        double da = a1 - a2;
+        int i, n;
+
+        da = std::acos(m_width_abs / (m_width_abs + 0.125 / m_approx_scale)) * 2;
+
+        add_vertex(vc, x + dx1, y + dy1);
+        if(m_width_sign > 0)
+        {
+            if(a1 > a2) a2 += 2 * pi;
+            n = int((a2 - a1) / da);
+            da = (a2 - a1) / (n + 1);
+            a1 += da;
+            for(i = 0; i < n; i++)
+            {
+                add_vertex(vc, x + std::cos(a1) * m_width, y + std::sin(a1) * m_width);
+                a1 += da;
+            }
+        }
+        else
+        {
+            if(a1 < a2) a2 -= 2 * pi;
+            n = int((a1 - a2) / da);
+            da = (a1 - a2) / (n + 1);
+            a1 -= da;
+            for(i = 0; i < n; i++)
+            {
+                add_vertex(vc, x + std::cos(a1) * m_width, y + std::sin(a1) * m_width);
+                a1 -= da;
+            }
+        }
+        add_vertex(vc, x + dx2, y + dy2);
+    }
+
+    //-----------------------------------------------------------------------
+    template<class VC> 
+    void math_stroke<VC>::calc_miter(VC& vc,
+                                     const vertex_dist& v0, 
+                                     const vertex_dist& v1, 
+                                     const vertex_dist& v2,
+                                     double dx1, double dy1, 
+                                     double dx2, double dy2,
+                                     line_join_e lj,
+                                     double mlimit,
+                                     double dbevel)
+    {
+        double xi  = v1.x;
+        double yi  = v1.y;
+        double di  = 1;
+        double lim = m_width_abs * mlimit;
+        bool miter_limit_exceeded = true; // Assume the worst
+        bool intersection_failed  = true; // Assume the worst
+
+        if(calc_intersection(v0.x + dx1, v0.y - dy1,
+                             v1.x + dx1, v1.y - dy1,
+                             v1.x + dx2, v1.y - dy2,
+                             v2.x + dx2, v2.y - dy2,
+                             &xi, &yi))
+        {
+            // Calculation of the intersection succeeded
+            //---------------------
+            di = calc_distance(v1.x, v1.y, xi, yi);
+            if(di <= lim)
+            {
+                // Inside the miter limit
+                //---------------------
+                add_vertex(vc, xi, yi);
+                miter_limit_exceeded = false;
+            }
+            intersection_failed = false;
+        }
+        else
+        {
+            // Calculation of the intersection failed, most probably
+            // the three points lie one straight line. 
+            // First check if v0 and v2 lie on the opposite sides of vector: 
+            // (v1.x, v1.y) -> (v1.x+dx1, v1.y-dy1), that is, the perpendicular
+            // to the line determined by vertices v0 and v1.
+            // This condition determines whether the next line segments continues
+            // the previous one or goes back.
+            //----------------
+            double x2 = v1.x + dx1;
+            double y2 = v1.y - dy1;
+            if((cross_product(v0.x, v0.y, v1.x, v1.y, x2, y2) < 0.0) == 
+               (cross_product(v1.x, v1.y, v2.x, v2.y, x2, y2) < 0.0))
+            {
+                // This case means that the next segment continues 
+                // the previous one (straight line)
+                //-----------------
+                add_vertex(vc, v1.x + dx1, v1.y - dy1);
+                miter_limit_exceeded = false;
+            }
+        }
+
+        if(miter_limit_exceeded)
+        {
+            // Miter limit exceeded
+            //------------------------
+            switch(lj)
+            {
+            case miter_join_revert:
+                // For the compatibility with SVG, PDF, etc, 
+                // we use a simple bevel join instead of
+                // "smart" bevel
+                //-------------------
+                add_vertex(vc, v1.x + dx1, v1.y - dy1);
+                add_vertex(vc, v1.x + dx2, v1.y - dy2);
+                break;
+
+            case miter_join_round:
+                calc_arc(vc, v1.x, v1.y, dx1, -dy1, dx2, -dy2);
+                break;
+
+            default:
+                // If no miter-revert, calculate new dx1, dy1, dx2, dy2
+                //----------------
+                if(intersection_failed)
+                {
+                    mlimit *= m_width_sign;
+                    add_vertex(vc, v1.x + dx1 + dy1 * mlimit, 
+                                   v1.y - dy1 + dx1 * mlimit);
+                    add_vertex(vc, v1.x + dx2 - dy2 * mlimit, 
+                                   v1.y - dy2 - dx2 * mlimit);
+                }
+                else
+                {
+                    double x1 = v1.x + dx1;
+                    double y1 = v1.y - dy1;
+                    double x2 = v1.x + dx2;
+                    double y2 = v1.y - dy2;
+                    di = (lim - dbevel) / (di - dbevel);
+                    add_vertex(vc, x1 + (xi - x1) * di, 
+                                   y1 + (yi - y1) * di);
+                    add_vertex(vc, x2 + (xi - x2) * di, 
+                                   y2 + (yi - y2) * di);
+                }
+                break;
+            }
+        }
+    }
+
+    //--------------------------------------------------------stroke_calc_cap
+    template<class VC> 
+    void math_stroke<VC>::calc_cap(VC& vc,
+                                   const vertex_dist& v0, 
+                                   const vertex_dist& v1, 
+                                   double len)
+    {
+        vc.remove_all();
+
+        double dx1 = (v1.y - v0.y) / len;
+        double dy1 = (v1.x - v0.x) / len;
+        double dx2 = 0;
+        double dy2 = 0;
+
+        dx1 *= m_width;
+        dy1 *= m_width;
+
+        if(m_line_cap != round_cap)
+        {
+            if(m_line_cap == square_cap)
+            {
+                dx2 = dy1 * m_width_sign;
+                dy2 = dx1 * m_width_sign;
+            }
+            add_vertex(vc, v0.x - dx1 - dx2, v0.y + dy1 - dy2);
+            add_vertex(vc, v0.x + dx1 - dx2, v0.y - dy1 - dy2);
+        }
+        else
+        {
+            double da = std::acos(m_width_abs / (m_width_abs + 0.125 / m_approx_scale)) * 2;
+            double a1;
+            int i;
+            int n = int(pi / da);
+
+            da = pi / (n + 1);
+            add_vertex(vc, v0.x - dx1, v0.y + dy1);
+            if(m_width_sign > 0)
+            {
+                a1 = std::atan2(dy1, -dx1);
+                a1 += da;
+                for(i = 0; i < n; i++)
+                {
+                    add_vertex(vc, v0.x + std::cos(a1) * m_width, 
+                                   v0.y + std::sin(a1) * m_width);
+                    a1 += da;
+                }
+            }
+            else
+            {
+                a1 = std::atan2(-dy1, dx1);
+                a1 -= da;
+                for(i = 0; i < n; i++)
+                {
+                    add_vertex(vc, v0.x + std::cos(a1) * m_width, 
+                                   v0.y + std::sin(a1) * m_width);
+                    a1 -= da;
+                }
+            }
+            add_vertex(vc, v0.x + dx1, v0.y - dy1);
+        }
+    }
+
+    //-----------------------------------------------------------------------
+    template<class VC> 
+    void math_stroke<VC>::calc_join(VC& vc,
+                                    const vertex_dist& v0, 
+                                    const vertex_dist& v1, 
+                                    const vertex_dist& v2,
+                                    double len1, 
+                                    double len2)
+    {
+        double dx1 = m_width * (v1.y - v0.y) / len1;
+        double dy1 = m_width * (v1.x - v0.x) / len1;
+        double dx2 = m_width * (v2.y - v1.y) / len2;
+        double dy2 = m_width * (v2.x - v1.x) / len2;
+
+        vc.remove_all();
+
+        double cp = cross_product(v0.x, v0.y, v1.x, v1.y, v2.x, v2.y);
+        if(cp != 0 && (cp > 0) == (m_width > 0))
+        {
+            // Inner join
+            //---------------
+            double limit = ((len1 < len2) ? len1 : len2) / m_width_abs;
+            if(limit < m_inner_miter_limit)
+            {
+                limit = m_inner_miter_limit;
+            }
+
+            switch(m_inner_join)
+            {
+            default: // inner_bevel
+                add_vertex(vc, v1.x + dx1, v1.y - dy1);
+                add_vertex(vc, v1.x + dx2, v1.y - dy2);
+                break;
+
+            case inner_miter:
+                calc_miter(vc,
+                           v0, v1, v2, dx1, dy1, dx2, dy2, 
+                           miter_join_revert, 
+                           limit, 0);
+                break;
+
+            case inner_jag:
+            case inner_round:
+                cp = (dx1-dx2) * (dx1-dx2) + (dy1-dy2) * (dy1-dy2);
+                if(cp < len1 * len1 && cp < len2 * len2)
+                {
+                    calc_miter(vc,
+                               v0, v1, v2, dx1, dy1, dx2, dy2, 
+                               miter_join_revert, 
+                               limit, 0);
+                }
+                else
+                {
+                    if(m_inner_join == inner_jag)
+                    {
+                        add_vertex(vc, v1.x + dx1, v1.y - dy1);
+                        add_vertex(vc, v1.x,       v1.y      );
+                        add_vertex(vc, v1.x + dx2, v1.y - dy2);
+                    }
+                    else
+                    {
+                        add_vertex(vc, v1.x + dx1, v1.y - dy1);
+                        add_vertex(vc, v1.x,       v1.y      );
+                        calc_arc(vc, v1.x, v1.y, dx2, -dy2, dx1, -dy1);
+                        add_vertex(vc, v1.x,       v1.y      );
+                        add_vertex(vc, v1.x + dx2, v1.y - dy2);
+                    }
+                }
+                break;
+            }
+        }
+        else
+        {
+            // Outer join
+            //---------------
+
+            // Calculate the distance between v1 and 
+            // the central point of the bevel line segment
+            //---------------
+            double dx = (dx1 + dx2) / 2;
+            double dy = (dy1 + dy2) / 2;
+            double dbevel = std::sqrt(dx * dx + dy * dy);
+
+            if(m_line_join == round_join || m_line_join == bevel_join)
+            {
+                // This is an optimization that reduces the number of points 
+                // in cases of almost collinear segments. If there's no
+                // visible difference between bevel and miter joins we'd rather
+                // use miter join because it adds only one point instead of two. 
+                //
+                // Here we calculate the middle point between the bevel points 
+                // and then, the distance between v1 and this middle point. 
+                // At outer joins this distance always less than stroke width, 
+                // because it's actually the height of an isosceles triangle of
+                // v1 and its two bevel points. If the difference between this
+                // width and this value is small (no visible bevel) we can 
+                // add just one point. 
+                //
+                // The constant in the expression makes the result approximately 
+                // the same as in round joins and caps. You can safely comment 
+                // out this entire "if".
+                //-------------------
+                if(m_approx_scale * (m_width_abs - dbevel) < m_width_eps)
+                {
+                    if(calc_intersection(v0.x + dx1, v0.y - dy1,
+                                         v1.x + dx1, v1.y - dy1,
+                                         v1.x + dx2, v1.y - dy2,
+                                         v2.x + dx2, v2.y - dy2,
+                                         &dx, &dy))
+                    {
+                        add_vertex(vc, dx, dy);
+                    }
+                    else
+                    {
+                        add_vertex(vc, v1.x + dx1, v1.y - dy1);
+                    }
+                    return;
+                }
+            }
+
+            switch(m_line_join)
+            {
+            case miter_join:
+            case miter_join_revert:
+            case miter_join_round:
+                calc_miter(vc, 
+                           v0, v1, v2, dx1, dy1, dx2, dy2, 
+                           m_line_join, 
+                           m_miter_limit,
+                           dbevel);
+                break;
+
+            case round_join:
+                calc_arc(vc, v1.x, v1.y, dx1, -dy1, dx2, -dy2);
+                break;
+
+            default: // Bevel join
+                add_vertex(vc, v1.x + dx1, v1.y - dy1);
+                add_vertex(vc, v1.x + dx2, v1.y - dy2);
+                break;
+            }
+        }
+    }
+
+
+
+
+}
+
+#endif
--- a/dep/agg/include/agg_path_length.h
+++ b/dep/agg/include/agg_path_length.h
@@ -0,0 +1,65 @@
+//----------------------------------------------------------------------------
+// Anti-Grain Geometry - Version 2.4
+// Copyright (C) 2002-2005 Maxim Shemanarev (http://www.antigrain.com)
+//
+// Permission to copy, use, modify, sell and distribute this software 
+// is granted provided this copyright notice appears in all copies. 
+// This software is provided "as is" without express or implied
+// warranty, and with no claim as to its suitability for any purpose.
+//
+//----------------------------------------------------------------------------
+// Contact: mcseem@antigrain.com
+//          mcseemagg@yahoo.com
+//          http://www.antigrain.com
+//----------------------------------------------------------------------------
+#ifndef AGG_PATH_LENGTH_INCLUDED
+#define AGG_PATH_LENGTH_INCLUDED
+
+#include "agg_math.h"
+
+namespace agg
+{
+    template<class VertexSource> 
+    double path_length(VertexSource& vs, unsigned path_id = 0)
+    {
+        double len = 0.0;
+        double start_x = 0.0;
+        double start_y = 0.0;
+        double x1 = 0.0;
+        double y1 = 0.0;
+        double x2 = 0.0;
+        double y2 = 0.0;
+        bool first = true;
+
+        unsigned cmd;
+        vs.rewind(path_id);
+        while(!is_stop(cmd = vs.vertex(&x2, &y2)))
+        {
+            if(is_vertex(cmd))
+            {
+                if(first || is_move_to(cmd))
+                {
+                    start_x = x2;
+                    start_y = y2;
+                }
+                else
+                {
+                    len += calc_distance(x1, y1, x2, y2);
+                }
+                x1 = x2;
+                y1 = y2;
+                first = false;
+            }
+            else
+            {
+                if(is_close(cmd) && !first)
+                {
+                    len += calc_distance(x1, y1, start_x, start_y);
+                }
+            }
+        }
+        return len;
+    }
+}
+
+#endif
--- a/dep/agg/include/agg_path_storage.h
+++ b/dep/agg/include/agg_path_storage.h
--- a/dep/agg/include/agg_path_storage_integer.h
+++ b/dep/agg/include/agg_path_storage_integer.h
@@ -0,0 +1,295 @@
+//----------------------------------------------------------------------------
+// Anti-Grain Geometry - Version 2.4
+// Copyright (C) 2002-2005 Maxim Shemanarev (http://www.antigrain.com)
+//
+// Permission to copy, use, modify, sell and distribute this software 
+// is granted provided this copyright notice appears in all copies. 
+// This software is provided "as is" without express or implied
+// warranty, and with no claim as to its suitability for any purpose.
+//
+//----------------------------------------------------------------------------
+// Contact: mcseem@antigrain.com
+//          mcseemagg@yahoo.com
+//          http://www.antigrain.com
+//----------------------------------------------------------------------------
+
+#ifndef AGG_PATH_STORAGE_INTEGER_INCLUDED
+#define AGG_PATH_STORAGE_INTEGER_INCLUDED
+
+#include <cstring>
+#include "agg_array.h"
+
+namespace agg
+{
+    //---------------------------------------------------------vertex_integer
+    template<class T, unsigned CoordShift=6> struct vertex_integer
+    {
+        enum path_cmd
+        {
+            cmd_move_to = 0,
+            cmd_line_to = 1,
+            cmd_curve3  = 2,
+            cmd_curve4  = 3
+        };
+
+        enum coord_scale_e
+        {
+            coord_shift = CoordShift,
+            coord_scale  = 1 << coord_shift
+        };
+
+        T x,y;
+        vertex_integer() {}
+        vertex_integer(T x_, T y_, unsigned flag) :
+            x(((x_ << 1) & ~1) | (flag &  1)),
+            y(((y_ << 1) & ~1) | (flag >> 1)) {}
+
+        unsigned vertex(double* x_, double* y_, 
+                        double dx=0, double dy=0,
+                        double scale=1.0) const
+        {
+            *x_ = dx + (double(x >> 1) / coord_scale) * scale;
+            *y_ = dy + (double(y >> 1) / coord_scale) * scale;
+            switch(((y & 1) << 1) | (x & 1))
+            {
+                case cmd_move_to: return path_cmd_move_to;
+                case cmd_line_to: return path_cmd_line_to;
+                case cmd_curve3:  return path_cmd_curve3;
+                case cmd_curve4:  return path_cmd_curve4;
+            }
+            return path_cmd_stop;
+        }
+    };
+
+
+    //---------------------------------------------------path_storage_integer
+    template<class T, unsigned CoordShift=6> class path_storage_integer
+    {
+    public:
+        typedef T value_type;
+        typedef vertex_integer<T, CoordShift> vertex_integer_type;
+
+        //--------------------------------------------------------------------
+        path_storage_integer() : m_storage(), m_vertex_idx(0), m_closed(true) {}
+
+        //--------------------------------------------------------------------
+        void remove_all() { m_storage.remove_all(); }
+
+        //--------------------------------------------------------------------
+        void move_to(T x, T y)
+        {
+            m_storage.add(vertex_integer_type(x, y, vertex_integer_type::cmd_move_to));
+        }
+
+        //--------------------------------------------------------------------
+        void line_to(T x, T y)
+        {
+            m_storage.add(vertex_integer_type(x, y, vertex_integer_type::cmd_line_to));
+        }
+
+        //--------------------------------------------------------------------
+        void curve3(T x_ctrl,  T y_ctrl, 
+                    T x_to,    T y_to)
+        {
+            m_storage.add(vertex_integer_type(x_ctrl, y_ctrl, vertex_integer_type::cmd_curve3));
+            m_storage.add(vertex_integer_type(x_to,   y_to,   vertex_integer_type::cmd_curve3));
+        }
+
+        //--------------------------------------------------------------------
+        void curve4(T x_ctrl1, T y_ctrl1, 
+                    T x_ctrl2, T y_ctrl2, 
+                    T x_to,    T y_to)
+        {
+            m_storage.add(vertex_integer_type(x_ctrl1, y_ctrl1, vertex_integer_type::cmd_curve4));
+            m_storage.add(vertex_integer_type(x_ctrl2, y_ctrl2, vertex_integer_type::cmd_curve4));
+            m_storage.add(vertex_integer_type(x_to,    y_to,    vertex_integer_type::cmd_curve4));
+        }
+
+        //--------------------------------------------------------------------
+        void close_polygon() {}
+
+        //--------------------------------------------------------------------
+        unsigned size() const { return m_storage.size(); }
+        unsigned vertex(unsigned idx, double* x, double* y) const
+        {
+            return m_storage[idx].vertex(x, y);
+        }
+
+        //--------------------------------------------------------------------
+        unsigned byte_size() const { return m_storage.size() * sizeof(vertex_integer_type); }
+        void serialize(int8u* ptr) const
+        {
+            unsigned i;
+            for(i = 0; i < m_storage.size(); i++)
+            {
+                std::memcpy(ptr, &m_storage[i], sizeof(vertex_integer_type));
+                ptr += sizeof(vertex_integer_type);
+            }
+        }
+
+        //--------------------------------------------------------------------
+        void rewind(unsigned) 
+        { 
+            m_vertex_idx = 0; 
+            m_closed = true;
+        }
+
+        //--------------------------------------------------------------------
+        unsigned vertex(double* x, double* y)
+        {
+            if(m_storage.size() < 2 || m_vertex_idx > m_storage.size()) 
+            {
+                *x = 0;
+                *y = 0;
+                return path_cmd_stop;
+            }
+            if(m_vertex_idx == m_storage.size())
+            {
+                *x = 0;
+                *y = 0;
+                ++m_vertex_idx;
+                return path_cmd_end_poly | path_flags_close;
+            }
+            unsigned cmd = m_storage[m_vertex_idx].vertex(x, y);
+            if(is_move_to(cmd) && !m_closed)
+            {
+                *x = 0;
+                *y = 0;
+                m_closed = true;
+                return path_cmd_end_poly | path_flags_close;
+            }
+            m_closed = false;
+            ++m_vertex_idx;
+            return cmd;
+        }
+
+        //--------------------------------------------------------------------
+        rect_d bounding_rect() const
+        {
+            rect_d bounds(1e100, 1e100, -1e100, -1e100);
+            if(m_storage.size() == 0)
+            {
+                bounds.x1 = bounds.y1 = bounds.x2 = bounds.y2 = 0.0;
+            }
+            else
+            {
+                unsigned i;
+                for(i = 0; i < m_storage.size(); i++)
+                {
+                    double x, y;
+                    m_storage[i].vertex(&x, &y);
+                    if(x < bounds.x1) bounds.x1 = x;
+                    if(y < bounds.y1) bounds.y1 = y;
+                    if(x > bounds.x2) bounds.x2 = x;
+                    if(y > bounds.y2) bounds.y2 = y;
+                }
+            }
+            return bounds;
+        }
+
+    private:
+        pod_bvector<vertex_integer_type, 6> m_storage;
+        unsigned                            m_vertex_idx;
+        bool                                m_closed;
+    };
+
+
+
+
+    //-----------------------------------------serialized_integer_path_adaptor
+    template<class T, unsigned CoordShift=6> class serialized_integer_path_adaptor
+    {
+    public:
+        typedef vertex_integer<T, CoordShift> vertex_integer_type;
+
+        //--------------------------------------------------------------------
+        serialized_integer_path_adaptor() :
+            m_data(0),
+            m_end(0),
+            m_ptr(0),
+            m_dx(0.0),
+            m_dy(0.0),
+            m_scale(1.0),
+            m_vertices(0)
+        {}
+
+        //--------------------------------------------------------------------
+        serialized_integer_path_adaptor(const int8u* data, unsigned size,
+                                        double dx, double dy) :
+            m_data(data),
+            m_end(data + size),
+            m_ptr(data),
+            m_dx(dx),
+            m_dy(dy),
+            m_vertices(0)
+        {}
+
+        //--------------------------------------------------------------------
+        void init(const int8u* data, unsigned size, 
+                  double dx, double dy, double scale=1.0)
+        {
+            m_data     = data;
+            m_end      = data + size;
+            m_ptr      = data;
+            m_dx       = dx;
+            m_dy       = dy;
+            m_scale    = scale;
+            m_vertices = 0;
+        }
+
+
+        //--------------------------------------------------------------------
+        void rewind(unsigned) 
+        { 
+            m_ptr      = m_data; 
+            m_vertices = 0;
+        }
+
+        //--------------------------------------------------------------------
+        unsigned vertex(double* x, double* y)
+        {
+            if(m_data == 0 || m_ptr > m_end) 
+            {
+                *x = 0;
+                *y = 0;
+                return path_cmd_stop;
+            }
+
+            if(m_ptr == m_end)
+            {
+                *x = 0;
+                *y = 0;
+                m_ptr += sizeof(vertex_integer_type);
+                return path_cmd_end_poly | path_flags_close;
+            }
+
+            vertex_integer_type v;
+            std::memcpy(&v, m_ptr, sizeof(vertex_integer_type));
+            unsigned cmd = v.vertex(x, y, m_dx, m_dy, m_scale);
+            if(is_move_to(cmd) && m_vertices > 2)
+            {
+                *x = 0;
+                *y = 0;
+                m_vertices = 0;
+                return path_cmd_end_poly | path_flags_close;
+            }
+            ++m_vertices;
+            m_ptr += sizeof(vertex_integer_type);
+            return cmd;
+        }
+
+    private:
+        const int8u* m_data;
+        const int8u* m_end;
+        const int8u* m_ptr;
+        double       m_dx;
+        double       m_dy;
+        double       m_scale;
+        unsigned     m_vertices;
+    };
+
+}
+
+
+#endif
+
--- a/dep/agg/include/agg_pattern_filters_rgba.h
+++ b/dep/agg/include/agg_pattern_filters_rgba.h
@@ -0,0 +1,123 @@
+//----------------------------------------------------------------------------
+// Anti-Grain Geometry - Version 2.4
+// Copyright (C) 2002-2005 Maxim Shemanarev (http://www.antigrain.com)
+//
+// Permission to copy, use, modify, sell and distribute this software 
+// is granted provided this copyright notice appears in all copies. 
+// This software is provided "as is" without express or implied
+// warranty, and with no claim as to its suitability for any purpose.
+//
+//----------------------------------------------------------------------------
+// Contact: mcseem@antigrain.com
+//          mcseemagg@yahoo.com
+//          http://www.antigrain.com
+//----------------------------------------------------------------------------
+#ifndef AGG_PATTERN_FILTERS_RGBA8_INCLUDED
+#define AGG_PATTERN_FILTERS_RGBA8_INCLUDED
+
+#include "agg_basics.h"
+#include "agg_line_aa_basics.h"
+#include "agg_color_rgba.h"
+
+
+namespace agg
+{
+
+    //=======================================================pattern_filter_nn
+    template<class ColorT> struct pattern_filter_nn
+    {
+        typedef ColorT color_type;
+        static unsigned dilation() { return 0; }
+
+        static void AGG_INLINE pixel_low_res(color_type const* const* buf, 
+                                             color_type* p, int x, int y)
+        {
+            *p = buf[y][x];
+        }
+
+        static void AGG_INLINE pixel_high_res(color_type const* const* buf, 
+                                              color_type* p, int x, int y)
+        {
+            *p = buf[y >> line_subpixel_shift]
+                    [x >> line_subpixel_shift];
+        }
+    };
+
+    typedef pattern_filter_nn<rgba8>  pattern_filter_nn_rgba8;
+    typedef pattern_filter_nn<rgba16> pattern_filter_nn_rgba16;
+
+
+    //===========================================pattern_filter_bilinear_rgba
+    template<class ColorT> struct pattern_filter_bilinear_rgba
+    {
+        typedef ColorT color_type;
+        typedef typename color_type::value_type value_type;
+        typedef typename color_type::calc_type calc_type;
+
+
+        static unsigned dilation() { return 1; }
+
+        static AGG_INLINE void pixel_low_res(color_type const* const* buf, 
+                                             color_type* p, int x, int y)
+        {
+            *p = buf[y][x];
+        }
+
+        static AGG_INLINE void pixel_high_res(color_type const* const* buf, 
+                                              color_type* p, int x, int y)
+        {
+            calc_type r, g, b, a;
+            r = g = b = a = 0;
+
+            calc_type weight;
+            int x_lr = x >> line_subpixel_shift;
+            int y_lr = y >> line_subpixel_shift;
+
+            x &= line_subpixel_mask;
+            y &= line_subpixel_mask;
+            const color_type* ptr = buf[y_lr] + x_lr;
+
+            weight = (line_subpixel_scale - x) * 
+                     (line_subpixel_scale - y);
+            r += weight * ptr->r;
+            g += weight * ptr->g;
+            b += weight * ptr->b;
+            a += weight * ptr->a;
+
+            ++ptr;
+
+            weight = x * (line_subpixel_scale - y);
+            r += weight * ptr->r;
+            g += weight * ptr->g;
+            b += weight * ptr->b;
+            a += weight * ptr->a;
+
+            ptr = buf[y_lr + 1] + x_lr;
+
+            weight = (line_subpixel_scale - x) * y;
+            r += weight * ptr->r;
+            g += weight * ptr->g;
+            b += weight * ptr->b;
+            a += weight * ptr->a;
+
+            ++ptr;
+
+            weight = x * y;
+            r += weight * ptr->r;
+            g += weight * ptr->g;
+            b += weight * ptr->b;
+            a += weight * ptr->a;
+
+            p->r = (value_type)color_type::downshift(r, line_subpixel_shift * 2);
+            p->g = (value_type)color_type::downshift(g, line_subpixel_shift * 2);
+            p->b = (value_type)color_type::downshift(b, line_subpixel_shift * 2);
+            p->a = (value_type)color_type::downshift(a, line_subpixel_shift * 2);
+        }
+    };
+
+    typedef pattern_filter_bilinear_rgba<rgba8>  pattern_filter_bilinear_rgba8;
+    typedef pattern_filter_bilinear_rgba<rgba16> pattern_filter_bilinear_rgba16;
+    typedef pattern_filter_bilinear_rgba<rgba32> pattern_filter_bilinear_rgba32;
+}
+
+#endif
--- a/dep/agg/include/agg_pixfmt_amask_adaptor.h
+++ b/dep/agg/include/agg_pixfmt_amask_adaptor.h
@@ -0,0 +1,240 @@
+//----------------------------------------------------------------------------
+// Anti-Grain Geometry - Version 2.4
+// Copyright (C) 2002-2005 Maxim Shemanarev (http://www.antigrain.com)
+//
+// Permission to copy, use, modify, sell and distribute this software 
+// is granted provided this copyright notice appears in all copies. 
+// This software is provided "as is" without express or implied
+// warranty, and with no claim as to its suitability for any purpose.
+//
+//----------------------------------------------------------------------------
+// Contact: mcseem@antigrain.com
+//          mcseemagg@yahoo.com
+//          http://www.antigrain.com
+//----------------------------------------------------------------------------
+
+#ifndef AGG_PIXFMT_AMASK_ADAPTOR_INCLUDED
+#define AGG_PIXFMT_AMASK_ADAPTOR_INCLUDED
+
+
+#include <cstring>
+#include "agg_array.h"
+#include "agg_rendering_buffer.h"
+
+
+namespace agg
+{
+    //==================================================pixfmt_amask_adaptor
+    template<class PixFmt, class AlphaMask> class pixfmt_amask_adaptor
+    {
+    public:
+        typedef PixFmt pixfmt_type;
+        typedef typename pixfmt_type::color_type color_type;
+        typedef typename pixfmt_type::row_data row_data;
+        typedef AlphaMask amask_type;
+        typedef typename amask_type::cover_type cover_type;
+
+    private:
+        enum span_extra_tail_e { span_extra_tail = 256 };
+
+        void realloc_span(unsigned len)
+        {
+            if(len > m_span.size())
+            {
+                m_span.resize(len + span_extra_tail);
+            }
+        }
+
+        void init_span(unsigned len)
+        {
+            realloc_span(len);
+            std::memset(&m_span[0], amask_type::cover_full, len * sizeof(cover_type));
+        }
+
+        void init_span(unsigned len, const cover_type* covers)
+        {
+            realloc_span(len);
+            std::memcpy(&m_span[0], covers, len * sizeof(cover_type));
+        }
+
+
+    public:
+        pixfmt_amask_adaptor(pixfmt_type& pixf, amask_type& mask) :
+            m_pixf(&pixf), m_mask(&mask), m_span()
+        {}
+
+        void attach_pixfmt(pixfmt_type& pixf) { m_pixf = &pixf; }
+        void attach_alpha_mask(amask_type& mask) { m_mask = &mask; }
+
+        //--------------------------------------------------------------------
+        template<class PixFmt2>
+        bool attach_pixfmt(PixFmt2& pixf, int x1, int y1, int x2, int y2)
+        {
+            return m_pixf->attach(pixf, x1, y1, x2, y2);
+        }
+
+        //--------------------------------------------------------------------
+        unsigned width()  const { return m_pixf->width();  }
+        unsigned height() const { return m_pixf->height(); }
+
+        //--------------------------------------------------------------------
+        color_type pixel(int x, int y)
+        {
+            return m_pixf->pixel(x, y);
+        }
+
+        //--------------------------------------------------------------------
+        void copy_pixel(int x, int y, const color_type& c)
+        {
+            m_pixf->blend_pixel(x, y, c, m_mask->pixel(x, y));
+        }
+
+        //--------------------------------------------------------------------
+        void blend_pixel(int x, int y, const color_type& c, cover_type cover)
+        {
+            m_pixf->blend_pixel(x, y, c, m_mask->combine_pixel(x, y, cover));
+        }
+
+        //--------------------------------------------------------------------
+        void copy_hline(int x, int y, 
+                        unsigned len, 
+                        const color_type& c)
+        {
+            realloc_span(len);
+            m_mask->fill_hspan(x, y, &m_span[0], len);
+            m_pixf->blend_solid_hspan(x, y, len, c, &m_span[0]);
+        }
+
+        //--------------------------------------------------------------------
+        void blend_hline(int x, int y,
+                         unsigned len, 
+                         const color_type& c,
+                         cover_type)
+        {
+            init_span(len);
+            m_mask->combine_hspan(x, y, &m_span[0], len);
+            m_pixf->blend_solid_hspan(x, y, len, c, &m_span[0]);
+        }
+
+        //--------------------------------------------------------------------
+        void copy_vline(int x, int y,
+                        unsigned len, 
+                        const color_type& c)
+        {
+            realloc_span(len);
+            m_mask->fill_vspan(x, y, &m_span[0], len);
+            m_pixf->blend_solid_vspan(x, y, len, c, &m_span[0]);
+        }
+
+        //--------------------------------------------------------------------
+        void blend_vline(int x, int y,
+                         unsigned len, 
+                         const color_type& c,
+                         cover_type)
+        {
+            init_span(len);
+            m_mask->combine_vspan(x, y, &m_span[0], len);
+            m_pixf->blend_solid_vspan(x, y, len, c, &m_span[0]);
+        }
+
+        //--------------------------------------------------------------------
+        void copy_from(const rendering_buffer& from, 
+                       int xdst, int ydst,
+                       int xsrc, int ysrc,
+                       unsigned len)
+        {
+            m_pixf->copy_from(from, xdst, ydst, xsrc, ysrc, len);
+        }
+
+
+        //--------------------------------------------------------------------
+        void blend_solid_hspan(int x, int y,
+                               unsigned len, 
+                               const color_type& c,
+                               const cover_type* covers)
+        {
+            init_span(len, covers);
+            m_mask->combine_hspan(x, y, &m_span[0], len);
+            m_pixf->blend_solid_hspan(x, y, len, c, &m_span[0]);
+        }
+
+
+        //--------------------------------------------------------------------
+        void blend_solid_vspan(int x, int y,
+                               unsigned len, 
+                               const color_type& c,
+                               const cover_type* covers)
+        {
+            init_span(len, covers);
+            m_mask->combine_vspan(x, y, &m_span[0], len);
+            m_pixf->blend_solid_vspan(x, y, len, c, &m_span[0]);
+        }
+
+
+        //--------------------------------------------------------------------
+        void copy_color_hspan(int x, int y, unsigned len, const color_type* colors)
+        {
+            realloc_span(len);
+            m_mask->fill_hspan(x, y, &m_span[0], len);
+            m_pixf->blend_color_hspan(x, y, len, colors, &m_span[0], cover_full);
+        }
+
+        //--------------------------------------------------------------------
+        void copy_color_vspan(int x, int y, unsigned len, const color_type* colors)
+        {
+            realloc_span(len);
+            m_mask->fill_vspan(x, y, &m_span[0], len);
+            m_pixf->blend_color_vspan(x, y, len, colors, &m_span[0], cover_full);
+        }
+
+        //--------------------------------------------------------------------
+        void blend_color_hspan(int x, int y,
+                               unsigned len, 
+                               const color_type* colors,
+                               const cover_type* covers,
+                               cover_type cover = cover_full)
+        {
+            if(covers) 
+            {
+                init_span(len, covers);
+                m_mask->combine_hspan(x, y, &m_span[0], len);
+            }
+            else
+            {
+                realloc_span(len);
+                m_mask->fill_hspan(x, y, &m_span[0], len);
+            }
+            m_pixf->blend_color_hspan(x, y, len, colors, &m_span[0], cover);
+        }
+
+
+        //--------------------------------------------------------------------
+        void blend_color_vspan(int x, int y,
+                               unsigned len, 
+                               const color_type* colors,
+                               const cover_type* covers,
+                               cover_type cover = cover_full)
+        {
+            if(covers) 
+            {
+                init_span(len, covers);
+                m_mask->combine_vspan(x, y, &m_span[0], len);
+            }
+            else
+            {
+                realloc_span(len);
+                m_mask->fill_vspan(x, y, &m_span[0], len);
+            }
+            m_pixf->blend_color_vspan(x, y, len, colors, &m_span[0], cover);
+        }
+
+    private:
+        pixfmt_type*          m_pixf;
+        const amask_type*     m_mask;
+        pod_array<cover_type> m_span;
+    };
+
+}
+
+#endif
+
--- a/dep/agg/include/agg_pixfmt_base.h
+++ b/dep/agg/include/agg_pixfmt_base.h
@@ -0,0 +1,97 @@
+//----------------------------------------------------------------------------
+// Anti-Grain Geometry - Version 2.4
+// Copyright (C) 2002-2005 Maxim Shemanarev (http://www.antigrain.com)
+//
+// Permission to copy, use, modify, sell and distribute this software 
+// is granted provided this copyright notice appears in all copies. 
+// This software is provided "as is" without express or implied
+// warranty, and with no claim as to its suitability for any purpose.
+//
+//----------------------------------------------------------------------------
+// Contact: mcseem@antigrain.com
+//          mcseemagg@yahoo.com
+//          http://www.antigrain.com
+//----------------------------------------------------------------------------
+
+#ifndef AGG_PIXFMT_BASE_INCLUDED
+#define AGG_PIXFMT_BASE_INCLUDED
+
+#include "agg_basics.h"
+#include "agg_color_gray.h"
+#include "agg_color_rgba.h"
+
+namespace agg
+{
+    struct pixfmt_gray_tag
+    {
+    };
+
+    struct pixfmt_rgb_tag
+    {
+    };
+
+    struct pixfmt_rgba_tag
+    {
+    };
+
+    //--------------------------------------------------------------blender_base
+    template<class ColorT, class Order = void> 
+    struct blender_base
+    {
+        typedef ColorT color_type;
+        typedef Order order_type;
+        typedef typename color_type::value_type value_type;
+
+        static rgba get(value_type r, value_type g, value_type b, value_type a, cover_type cover = cover_full)
+        {
+            if (cover > cover_none)
+            {
+                rgba c(
+                    color_type::to_double(r), 
+                    color_type::to_double(g), 
+                    color_type::to_double(b), 
+                    color_type::to_double(a));
+
+                if (cover < cover_full)
+                {
+                    double x = double(cover) / cover_full;
+                    c.r *= x;
+                    c.g *= x;
+                    c.b *= x;
+                    c.a *= x;
+                }
+
+                return c;
+            }
+            else return rgba::no_color();
+        }
+
+        static rgba get(const value_type* p, cover_type cover = cover_full)
+        {
+            return get(
+                p[order_type::R], 
+                p[order_type::G], 
+                p[order_type::B], 
+                p[order_type::A], 
+                cover);
+        }
+
+        static void set(value_type* p, value_type r, value_type g, value_type b, value_type a)
+        {
+            p[order_type::R] = r;
+            p[order_type::G] = g;
+            p[order_type::B] = b;
+            p[order_type::A] = a;
+        }
+
+        static void set(value_type* p, const rgba& c)
+        {
+            p[order_type::R] = color_type::from_double(c.r);
+            p[order_type::G] = color_type::from_double(c.g);
+            p[order_type::B] = color_type::from_double(c.b);
+            p[order_type::A] = color_type::from_double(c.a);
+        }
+    };
+}
+
+#endif
--- a/dep/agg/include/agg_pixfmt_gray.h
+++ b/dep/agg/include/agg_pixfmt_gray.h
@@ -0,0 +1,738 @@
+//----------------------------------------------------------------------------
+// Anti-Grain Geometry - Version 2.4
+// Copyright (C) 2002-2005 Maxim Shemanarev (http://www.antigrain.com)
+//
+// Permission to copy, use, modify, sell and distribute this software 
+// is granted provided this copyright notice appears in all copies. 
+// This software is provided "as is" without express or implied
+// warranty, and with no claim as to its suitability for any purpose.
+//
+//----------------------------------------------------------------------------
+// Contact: mcseem@antigrain.com
+//          mcseemagg@yahoo.com
+//          http://www.antigrain.com
+//----------------------------------------------------------------------------
+//
+// Adaptation for high precision colors has been sponsored by 
+// Liberty Technology Systems, Inc., visit http://lib-sys.com
+//
+// Liberty Technology Systems, Inc. is the provider of
+// PostScript and PDF technology for software developers.
+// 
+//----------------------------------------------------------------------------
+
+#ifndef AGG_PIXFMT_GRAY_INCLUDED
+#define AGG_PIXFMT_GRAY_INCLUDED
+
+#include <cstring>
+#include "agg_pixfmt_base.h"
+#include "agg_rendering_buffer.h"
+
+namespace agg
+{
+ 
+    //============================================================blender_gray
+    template<class ColorT> struct blender_gray
+    {
+        typedef ColorT color_type;
+        typedef typename color_type::value_type value_type;
+        typedef typename color_type::calc_type calc_type;
+        typedef typename color_type::long_type long_type;
+
+        // Blend pixels using the non-premultiplied form of Alvy-Ray Smith's
+        // compositing function. Since the render buffer is opaque we skip the
+        // initial premultiply and final demultiply.
+
+        static AGG_INLINE void blend_pix(value_type* p, 
+            value_type cv, value_type alpha, cover_type cover)
+        {
+            blend_pix(p, cv, color_type::mult_cover(alpha, cover));
+        }
+
+        static AGG_INLINE void blend_pix(value_type* p, 
+            value_type cv, value_type alpha)
+        {
+            *p = color_type::lerp(*p, cv, alpha);
+        }
+    };
+
+
+    //======================================================blender_gray_pre
+    template<class ColorT> struct blender_gray_pre
+    {
+        typedef ColorT color_type;
+        typedef typename color_type::value_type value_type;
+        typedef typename color_type::calc_type calc_type;
+        typedef typename color_type::long_type long_type;
+
+        // Blend pixels using the premultiplied form of Alvy-Ray Smith's
+        // compositing function. 
+
+        static AGG_INLINE void blend_pix(value_type* p, 
+            value_type cv, value_type alpha, cover_type cover)
+        {
+            blend_pix(p, color_type::mult_cover(cv, cover), color_type::mult_cover(alpha, cover));
+        }
+
+        static AGG_INLINE void blend_pix(value_type* p, 
+            value_type cv, value_type alpha)
+        {
+            *p = color_type::prelerp(*p, cv, alpha);
+        }
+    };
+    
+
+
+    //=====================================================apply_gamma_dir_gray
+    template<class ColorT, class GammaLut> class apply_gamma_dir_gray
+    {
+    public:
+        typedef typename ColorT::value_type value_type;
+
+        apply_gamma_dir_gray(const GammaLut& gamma) : m_gamma(gamma) {}
+
+        AGG_INLINE void operator () (value_type* p)
+        {
+            *p = m_gamma.dir(*p);
+        }
+
+    private:
+        const GammaLut& m_gamma;
+    };
+
+
+
+    //=====================================================apply_gamma_inv_gray
+    template<class ColorT, class GammaLut> class apply_gamma_inv_gray
+    {
+    public:
+        typedef typename ColorT::value_type value_type;
+
+        apply_gamma_inv_gray(const GammaLut& gamma) : m_gamma(gamma) {}
+
+        AGG_INLINE void operator () (value_type* p)
+        {
+            *p = m_gamma.inv(*p);
+        }
+
+    private:
+        const GammaLut& m_gamma;
+    };
+
+
+
+    //=================================================pixfmt_alpha_blend_gray
+    template<class Blender, class RenBuf, unsigned Step = 1, unsigned Offset = 0>
+    class pixfmt_alpha_blend_gray
+    {
+    public:
+        typedef pixfmt_gray_tag pixfmt_category;
+        typedef RenBuf   rbuf_type;
+        typedef typename rbuf_type::row_data row_data;
+        typedef Blender  blender_type;
+        typedef typename blender_type::color_type color_type;
+        typedef int                               order_type; // A fake one
+        typedef typename color_type::value_type   value_type;
+        typedef typename color_type::calc_type    calc_type;
+        enum 
+        {
+            num_components = 1,
+            pix_width = sizeof(value_type) * Step,
+            pix_step = Step,
+            pix_offset = Offset,
+        };
+        struct pixel_type
+        {
+            value_type c[num_components];
+
+            void set(value_type v)
+            {
+                c[0] = v;
+            }
+
+            void set(const color_type& color)
+            {
+                set(color.v);
+            }
+
+            void get(value_type& v) const
+            {
+                v = c[0];
+            }
+
+            color_type get() const
+            {
+                return color_type(c[0]);
+            }
+
+            pixel_type* next()
+            {
+                return (pixel_type*)(c + pix_step);
+            }
+
+            const pixel_type* next() const
+            {
+                return (const pixel_type*)(c + pix_step);
+            }
+
+            pixel_type* advance(int n)
+            {
+                return (pixel_type*)(c + n * pix_step);
+            }
+
+            const pixel_type* advance(int n) const
+            {
+                return (const pixel_type*)(c + n * pix_step);
+            }
+        };
+
+    private:
+        //--------------------------------------------------------------------
+        AGG_INLINE void blend_pix(pixel_type* p, 
+            value_type v, value_type a, 
+            unsigned cover)
+        {
+            blender_type::blend_pix(p->c, v, a, cover);
+        }
+
+        //--------------------------------------------------------------------
+        AGG_INLINE void blend_pix(pixel_type* p, value_type v, value_type a)
+        {
+            blender_type::blend_pix(p->c, v, a);
+        }
+
+        //--------------------------------------------------------------------
+        AGG_INLINE void blend_pix(pixel_type* p, const color_type& c, unsigned cover)
+        {
+            blender_type::blend_pix(p->c, c.v, c.a, cover);
+        }
+
+        //--------------------------------------------------------------------
+        AGG_INLINE void blend_pix(pixel_type* p, const color_type& c)
+        {
+            blender_type::blend_pix(p->c, c.v, c.a);
+        }
+
+        //--------------------------------------------------------------------
+        AGG_INLINE void copy_or_blend_pix(pixel_type* p, const color_type& c, unsigned cover)
+        {
+            if (!c.is_transparent())
+            {
+                if (c.is_opaque() && cover == cover_mask)
+                {
+                    p->set(c);
+                }
+                else
+                {
+                    blend_pix(p, c, cover);
+                }
+            }
+        }
+
+        //--------------------------------------------------------------------
+        AGG_INLINE void copy_or_blend_pix(pixel_type* p, const color_type& c)
+        {
+            if (!c.is_transparent())
+            {
+                if (c.is_opaque())
+                {
+                    p->set(c);
+                }
+                else
+                {
+                    blend_pix(p, c);
+                }
+            }
+        }
+
+    public:
+        //--------------------------------------------------------------------
+        explicit pixfmt_alpha_blend_gray(rbuf_type& rb) :
+            m_rbuf(&rb)
+        {}
+        void attach(rbuf_type& rb) { m_rbuf = &rb; }
+        //--------------------------------------------------------------------
+
+        template<class PixFmt>
+        bool attach(PixFmt& pixf, int x1, int y1, int x2, int y2)
+        {
+            rect_i r(x1, y1, x2, y2);
+            if (r.clip(rect_i(0, 0, pixf.width()-1, pixf.height()-1)))
+            {
+                int stride = pixf.stride();
+                m_rbuf->attach(pixf.pix_ptr(r.x1, stride < 0 ? r.y2 : r.y1), 
+                               (r.x2 - r.x1) + 1,
+                               (r.y2 - r.y1) + 1,
+                               stride);
+                return true;
+            }
+            return false;
+        }
+
+        //--------------------------------------------------------------------
+        AGG_INLINE unsigned width()  const { return m_rbuf->width();  }
+        AGG_INLINE unsigned height() const { return m_rbuf->height(); }
+        AGG_INLINE int      stride() const { return m_rbuf->stride(); }
+
+        //--------------------------------------------------------------------
+        int8u* row_ptr(int y)       { return m_rbuf->row_ptr(y); }
+        const int8u* row_ptr(int y) const { return m_rbuf->row_ptr(y); }
+        row_data     row(int y)     const { return m_rbuf->row(y); }
+
+        //--------------------------------------------------------------------
+        AGG_INLINE int8u* pix_ptr(int x, int y) 
+        { 
+            return m_rbuf->row_ptr(y) + sizeof(value_type) * (x * pix_step + pix_offset);
+        }
+
+        AGG_INLINE const int8u* pix_ptr(int x, int y) const 
+        { 
+            return m_rbuf->row_ptr(y) + sizeof(value_type) * (x * pix_step + pix_offset);
+        }
+
+        // Return pointer to pixel value, forcing row to be allocated.
+        AGG_INLINE pixel_type* pix_value_ptr(int x, int y, unsigned len) 
+        {
+            return (pixel_type*)(m_rbuf->row_ptr(x, y, len) + sizeof(value_type) * (x * pix_step + pix_offset));
+        }
+
+        // Return pointer to pixel value, or null if row not allocated.
+        AGG_INLINE const pixel_type* pix_value_ptr(int x, int y) const 
+        {
+            int8u* p = m_rbuf->row_ptr(y);
+            return p ? (pixel_type*)(p + sizeof(value_type) * (x * pix_step + pix_offset)) : 0;
+        }
+
+        // Get pixel pointer from raw buffer pointer.
+        AGG_INLINE static pixel_type* pix_value_ptr(void* p) 
+        {
+            return (pixel_type*)((value_type*)p + pix_offset);
+        }
+
+        // Get pixel pointer from raw buffer pointer.
+        AGG_INLINE static const pixel_type* pix_value_ptr(const void* p) 
+        {
+            return (const pixel_type*)((const value_type*)p + pix_offset);
+        }
+
+        //--------------------------------------------------------------------
+        AGG_INLINE static void write_plain_color(void* p, color_type c)
+        {
+            // Grayscale formats are implicitly premultiplied.
+            c.premultiply();
+            pix_value_ptr(p)->set(c);
+        }
+
+        //--------------------------------------------------------------------
+        AGG_INLINE static color_type read_plain_color(const void* p)
+        {
+            return pix_value_ptr(p)->get();
+        }
+
+        //--------------------------------------------------------------------
+        AGG_INLINE static void make_pix(int8u* p, const color_type& c)
+        {
+            ((pixel_type*)p)->set(c);
+        }
+
+        //--------------------------------------------------------------------
+        AGG_INLINE color_type pixel(int x, int y) const
+        {
+            if (const pixel_type* p = pix_value_ptr(x, y))
+            {
+                return p->get();
+            }
+            return color_type::no_color();
+        }
+
+        //--------------------------------------------------------------------
+        AGG_INLINE void copy_pixel(int x, int y, const color_type& c)
+        {
+            pix_value_ptr(x, y, 1)->set(c);
+        }
+
+        //--------------------------------------------------------------------
+        AGG_INLINE void blend_pixel(int x, int y, const color_type& c, int8u cover)
+        {
+            copy_or_blend_pix(pix_value_ptr(x, y, 1), c, cover);
+        }
+
+        //--------------------------------------------------------------------
+        AGG_INLINE void copy_hline(int x, int y, 
+                                   unsigned len, 
+                                   const color_type& c)
+        {
+            pixel_type* p = pix_value_ptr(x, y, len);
+            do
+            {
+                p->set(c);
+                p = p->next();
+            }
+            while(--len);
+        }
+
+
+        //--------------------------------------------------------------------
+        AGG_INLINE void copy_vline(int x, int y,
+                                   unsigned len, 
+                                   const color_type& c)
+        {
+            do
+            {
+                pix_value_ptr(x, y++, 1)->set(c);
+            }
+            while (--len);
+        }
+
+
+        //--------------------------------------------------------------------
+        void blend_hline(int x, int y,
+                         unsigned len, 
+                         const color_type& c,
+                         int8u cover)
+        {
+            if (!c.is_transparent())
+            {
+                pixel_type* p = pix_value_ptr(x, y, len);
+
+                if (c.is_opaque() && cover == cover_mask)
+                {
+                    do
+                    {
+                        p->set(c);
+                        p = p->next();
+                    }
+                    while (--len);
+                }
+                else
+                {
+                    do
+                    {
+                        blend_pix(p, c, cover);
+                        p = p->next();
+                    }
+                    while (--len);
+                }
+            }
+        }
+
+
+        //--------------------------------------------------------------------
+        void blend_vline(int x, int y,
+                         unsigned len, 
+                         const color_type& c,
+                         int8u cover)
+        {
+            if (!c.is_transparent())
+            {
+                if (c.is_opaque() && cover == cover_mask)
+                {
+                    do
+                    {
+                        pix_value_ptr(x, y++, 1)->set(c);
+                    }
+                    while (--len);
+                }
+                else
+                {
+                    do
+                    {
+                        blend_pix(pix_value_ptr(x, y++, 1), c, cover);
+                    }
+                    while (--len);
+                }
+            }
+        }
+
+
+        //--------------------------------------------------------------------
+        void blend_solid_hspan(int x, int y,
+                               unsigned len, 
+                               const color_type& c,
+                               const int8u* covers)
+        {
+            if (!c.is_transparent())
+            {
+                pixel_type* p = pix_value_ptr(x, y, len);
+
+                do 
+                {
+                    if (c.is_opaque() && *covers == cover_mask)
+                    {
+                        p->set(c);
+                    }
+                    else
+                    {
+                        blend_pix(p, c, *covers);
+                    }
+                    p = p->next();
+                    ++covers;
+                }
+                while (--len);
+            }
+        }
+
+
+        //--------------------------------------------------------------------
+        void blend_solid_vspan(int x, int y,
+                               unsigned len, 
+                               const color_type& c,
+                               const int8u* covers)
+        {
+            if (!c.is_transparent())
+            {
+                do 
+                {
+                    pixel_type* p = pix_value_ptr(x, y++, 1);
+
+                    if (c.is_opaque() && *covers == cover_mask)
+                    {
+                        p->set(c);
+                    }
+                    else
+                    {
+                        blend_pix(p, c, *covers);
+                    }
+                    ++covers;
+                }
+                while (--len);
+            }
+        }
+
+
+        //--------------------------------------------------------------------
+        void copy_color_hspan(int x, int y,
+                              unsigned len, 
+                              const color_type* colors)
+        {
+            pixel_type* p = pix_value_ptr(x, y, len);
+
+            do 
+            {
+                p->set(*colors++);
+                p = p->next();
+            }
+            while (--len);
+        }
+
+
+        //--------------------------------------------------------------------
+        void copy_color_vspan(int x, int y,
+                              unsigned len, 
+                              const color_type* colors)
+        {
+            do 
+            {
+                pix_value_ptr(x, y++, 1)->set(*colors++);
+            }
+            while (--len);
+        }
+
+
+        //--------------------------------------------------------------------
+        void blend_color_hspan(int x, int y,
+                               unsigned len, 
+                               const color_type* colors,
+                               const int8u* covers,
+                               int8u cover)
+        {
+            pixel_type* p = pix_value_ptr(x, y, len);
+
+            if (covers)
+            {
+                do 
+                {
+                    copy_or_blend_pix(p, *colors++, *covers++);
+                    p = p->next();
+                }
+                while (--len);
+            }
+            else
+            {
+                if (cover == cover_mask)
+                {
+                    do 
+                    {
+                        copy_or_blend_pix(p, *colors++);
+                        p = p->next();
+                    }
+                    while (--len);
+                }
+                else
+                {
+                    do 
+                    {
+                        copy_or_blend_pix(p, *colors++, cover);
+                        p = p->next();
+                    }
+                    while (--len);
+                }
+            }
+        }
+        
+
+        //--------------------------------------------------------------------
+        void blend_color_vspan(int x, int y,
+                               unsigned len, 
+                               const color_type* colors,
+                               const int8u* covers,
+                               int8u cover)
+        {
+            if (covers)
+            {
+                do 
+                {
+                    copy_or_blend_pix(pix_value_ptr(x, y++, 1), *colors++, *covers++);
+                }
+                while (--len);
+            }
+            else
+            {
+                if (cover == cover_mask)
+                {
+                    do 
+                    {
+                        copy_or_blend_pix(pix_value_ptr(x, y++, 1), *colors++);
+                    }
+                    while (--len);
+                }
+                else
+                {
+                    do 
+                    {
+                        copy_or_blend_pix(pix_value_ptr(x, y++, 1), *colors++, cover);
+                    }
+                    while (--len);
+                }
+            }
+        }
+
+        //--------------------------------------------------------------------
+        template<class Function> void for_each_pixel(Function f)
+        {
+            unsigned y;
+            for (y = 0; y < height(); ++y)
+            {
+                row_data r = m_rbuf->row(y);
+                if (r.ptr)
+                {
+                    unsigned len = r.x2 - r.x1 + 1;
+                    pixel_type* p = pix_value_ptr(r.x1, y, len);
+                    do
+                    {
+                        f(p->c);
+                        p = p->next();
+                    }
+                    while (--len);
+                }
+            }
+        }
+
+        //--------------------------------------------------------------------
+        template<class GammaLut> void apply_gamma_dir(const GammaLut& g)
+        {
+            for_each_pixel(apply_gamma_dir_gray<color_type, GammaLut>(g));
+        }
+
+        //--------------------------------------------------------------------
+        template<class GammaLut> void apply_gamma_inv(const GammaLut& g)
+        {
+            for_each_pixel(apply_gamma_inv_gray<color_type, GammaLut>(g));
+        }
+
+        //--------------------------------------------------------------------
+        template<class RenBuf2>
+        void copy_from(const RenBuf2& from, 
+                       int xdst, int ydst,
+                       int xsrc, int ysrc,
+                       unsigned len)
+        {
+            if (const int8u* p = from.row_ptr(ysrc))
+            {
+                std::memmove(m_rbuf->row_ptr(xdst, ydst, len) + xdst * pix_width, 
+                        p + xsrc * pix_width, 
+                        len * pix_width);
+            }
+        }
+
+        //--------------------------------------------------------------------
+        // Blend from single color, using grayscale surface as alpha channel.
+        template<class SrcPixelFormatRenderer>
+        void blend_from_color(const SrcPixelFormatRenderer& from, 
+                              const color_type& color,
+                              int xdst, int ydst,
+                              int xsrc, int ysrc,
+                              unsigned len,
+                              int8u cover)
+        {
+            typedef typename SrcPixelFormatRenderer::pixel_type src_pixel_type;
+            typedef typename SrcPixelFormatRenderer::color_type src_color_type;
+
+            if (const src_pixel_type* psrc = from.pix_value_ptr(xsrc, ysrc))
+            {
+                pixel_type* pdst = pix_value_ptr(xdst, ydst, len);
+
+                do 
+                {
+                    copy_or_blend_pix(pdst, color, src_color_type::scale_cover(cover, psrc->c[0]));
+                    psrc = psrc->next();
+                    pdst = pdst->next();
+                }
+                while (--len);
+            }
+        }
+
+        //--------------------------------------------------------------------
+        // Blend from color table, using grayscale surface as indexes into table.
+        // Obviously, this only works for integer value types.
+        template<class SrcPixelFormatRenderer>
+        void blend_from_lut(const SrcPixelFormatRenderer& from, 
+                            const color_type* color_lut,
+                            int xdst, int ydst,
+                            int xsrc, int ysrc,
+                            unsigned len,
+                            int8u cover)
+        {
+            typedef typename SrcPixelFormatRenderer::pixel_type src_pixel_type;
+
+            if (const src_pixel_type* psrc = from.pix_value_ptr(xsrc, ysrc))
+            {
+                pixel_type* pdst = pix_value_ptr(xdst, ydst, len);
+
+                do 
+                {
+                    copy_or_blend_pix(pdst, color_lut[psrc->c[0]], cover);
+                    psrc = psrc->next();
+                    pdst = pdst->next();
+                }
+                while (--len);
+            }
+        }
+
+    private:
+        rbuf_type* m_rbuf;
+    };
+
+    typedef blender_gray<gray8> blender_gray8;
+    typedef blender_gray<sgray8> blender_sgray8;
+    typedef blender_gray<gray16> blender_gray16;
+    typedef blender_gray<gray32> blender_gray32;
+
+    typedef blender_gray_pre<gray8> blender_gray8_pre;
+    typedef blender_gray_pre<sgray8> blender_sgray8_pre;
+    typedef blender_gray_pre<gray16> blender_gray16_pre;
+    typedef blender_gray_pre<gray32> blender_gray32_pre;
+
+    typedef pixfmt_alpha_blend_gray<blender_gray8, rendering_buffer> pixfmt_gray8;
+    typedef pixfmt_alpha_blend_gray<blender_sgray8, rendering_buffer> pixfmt_sgray8;
+    typedef pixfmt_alpha_blend_gray<blender_gray16, rendering_buffer> pixfmt_gray16;
+    typedef pixfmt_alpha_blend_gray<blender_gray32, rendering_buffer> pixfmt_gray32;
+
+    typedef pixfmt_alpha_blend_gray<blender_gray8_pre, rendering_buffer> pixfmt_gray8_pre;
+    typedef pixfmt_alpha_blend_gray<blender_sgray8_pre, rendering_buffer> pixfmt_sgray8_pre;
+    typedef pixfmt_alpha_blend_gray<blender_gray16_pre, rendering_buffer> pixfmt_gray16_pre;
+    typedef pixfmt_alpha_blend_gray<blender_gray32_pre, rendering_buffer> pixfmt_gray32_pre;
+}
+
+#endif
+
--- a/dep/agg/include/agg_pixfmt_rgb.h
+++ b/dep/agg/include/agg_pixfmt_rgb.h
@@ -0,0 +1,995 @@
+//----------------------------------------------------------------------------
+// Anti-Grain Geometry - Version 2.4
+// Copyright (C) 2002-2005 Maxim Shemanarev (http://www.antigrain.com)
+//
+// Permission to copy, use, modify, sell and distribute this software 
+// is granted provided this copyright notice appears in all copies. 
+// This software is provided "as is" without express or implied
+// warranty, and with no claim as to its suitability for any purpose.
+//
+//----------------------------------------------------------------------------
+// Contact: mcseem@antigrain.com
+//          mcseemagg@yahoo.com
+//          http://www.antigrain.com
+//----------------------------------------------------------------------------
+//
+// Adaptation for high precision colors has been sponsored by 
+// Liberty Technology Systems, Inc., visit http://lib-sys.com
+//
+// Liberty Technology Systems, Inc. is the provider of
+// PostScript and PDF technology for software developers.
+// 
+//----------------------------------------------------------------------------
+
+#ifndef AGG_PIXFMT_RGB_INCLUDED
+#define AGG_PIXFMT_RGB_INCLUDED
+
+#include <cstring>
+#include "agg_pixfmt_base.h"
+#include "agg_rendering_buffer.h"
+
+namespace agg
+{
+
+    //=====================================================apply_gamma_dir_rgb
+    template<class ColorT, class Order, class GammaLut> class apply_gamma_dir_rgb
+    {
+    public:
+        typedef typename ColorT::value_type value_type;
+
+        apply_gamma_dir_rgb(const GammaLut& gamma) : m_gamma(gamma) {}
+
+        AGG_INLINE void operator () (value_type* p)
+        {
+            p[Order::R] = m_gamma.dir(p[Order::R]);
+            p[Order::G] = m_gamma.dir(p[Order::G]);
+            p[Order::B] = m_gamma.dir(p[Order::B]);
+        }
+
+    private:
+        const GammaLut& m_gamma;
+    };
+
+
+
+    //=====================================================apply_gamma_inv_rgb
+    template<class ColorT, class Order, class GammaLut> class apply_gamma_inv_rgb
+    {
+    public:
+        typedef typename ColorT::value_type value_type;
+
+        apply_gamma_inv_rgb(const GammaLut& gamma) : m_gamma(gamma) {}
+
+        AGG_INLINE void operator () (value_type* p)
+        {
+            p[Order::R] = m_gamma.inv(p[Order::R]);
+            p[Order::G] = m_gamma.inv(p[Order::G]);
+            p[Order::B] = m_gamma.inv(p[Order::B]);
+        }
+
+    private:
+        const GammaLut& m_gamma;
+    };
+
+
+    //=========================================================blender_rgb
+    template<class ColorT, class Order> 
+    struct blender_rgb
+    {
+        typedef ColorT color_type;
+        typedef Order order_type;
+        typedef typename color_type::value_type value_type;
+        typedef typename color_type::calc_type calc_type;
+        typedef typename color_type::long_type long_type;
+
+        // Blend pixels using the non-premultiplied form of Alvy-Ray Smith's
+        // compositing function. Since the render buffer is opaque we skip the
+        // initial premultiply and final demultiply.
+
+        //--------------------------------------------------------------------
+        static AGG_INLINE void blend_pix(value_type* p, 
+            value_type cr, value_type cg, value_type cb, value_type alpha, cover_type cover)
+        {
+            blend_pix(p, cr, cg, cb, color_type::mult_cover(alpha, cover));
+        }
+        
+        //--------------------------------------------------------------------
+        static AGG_INLINE void blend_pix(value_type* p, 
+            value_type cr, value_type cg, value_type cb, value_type alpha)
+        {
+            p[Order::R] = color_type::lerp(p[Order::R], cr, alpha);
+            p[Order::G] = color_type::lerp(p[Order::G], cg, alpha);
+            p[Order::B] = color_type::lerp(p[Order::B], cb, alpha);
+        }
+    };
+
+    //======================================================blender_rgb_pre
+    template<class ColorT, class Order> 
+    struct blender_rgb_pre
+    {
+        typedef ColorT color_type;
+        typedef Order order_type;
+        typedef typename color_type::value_type value_type;
+        typedef typename color_type::calc_type calc_type;
+        typedef typename color_type::long_type long_type;
+
+        // Blend pixels using the premultiplied form of Alvy-Ray Smith's
+        // compositing function. 
+
+        //--------------------------------------------------------------------
+        static AGG_INLINE void blend_pix(value_type* p, 
+            value_type cr, value_type cg, value_type cb, value_type alpha, cover_type cover)
+        {
+            blend_pix(p, 
+                color_type::mult_cover(cr, cover), 
+                color_type::mult_cover(cg, cover), 
+                color_type::mult_cover(cb, cover), 
+                color_type::mult_cover(alpha, cover));
+        }
+
+        //--------------------------------------------------------------------
+        static AGG_INLINE void blend_pix(value_type* p, 
+            value_type cr, value_type cg, value_type cb, value_type alpha)
+        {
+            p[Order::R] = color_type::prelerp(p[Order::R], cr, alpha);
+            p[Order::G] = color_type::prelerp(p[Order::G], cg, alpha);
+            p[Order::B] = color_type::prelerp(p[Order::B], cb, alpha);
+        }
+    };
+
+    //===================================================blender_rgb_gamma
+    template<class ColorT, class Order, class Gamma> 
+    class blender_rgb_gamma : public blender_base<ColorT, Order>
+    {
+    public:
+        typedef ColorT color_type;
+        typedef Order order_type;
+        typedef Gamma gamma_type;
+        typedef typename color_type::value_type value_type;
+        typedef typename color_type::calc_type calc_type;
+        typedef typename color_type::long_type long_type;
+
+        //--------------------------------------------------------------------
+        blender_rgb_gamma() : m_gamma(0) {}
+        void gamma(const gamma_type& g) { m_gamma = &g; }
+
+        //--------------------------------------------------------------------
+        AGG_INLINE void blend_pix(value_type* p, 
+            value_type cr, value_type cg, value_type cb, value_type alpha, cover_type cover)
+        {
+            blend_pix(p, cr, cg, cb, color_type::mult_cover(alpha, cover));
+        }
+        
+        //--------------------------------------------------------------------
+        AGG_INLINE void blend_pix(value_type* p, 
+            value_type cr, value_type cg, value_type cb, value_type alpha)
+        {
+            calc_type r = m_gamma->dir(p[Order::R]);
+            calc_type g = m_gamma->dir(p[Order::G]);
+            calc_type b = m_gamma->dir(p[Order::B]);
+            p[Order::R] = m_gamma->inv(color_type::downscale((m_gamma->dir(cr) - r) * alpha) + r);
+            p[Order::G] = m_gamma->inv(color_type::downscale((m_gamma->dir(cg) - g) * alpha) + g);
+            p[Order::B] = m_gamma->inv(color_type::downscale((m_gamma->dir(cb) - b) * alpha) + b);
+        }
+        
+    private:
+        const gamma_type* m_gamma;
+    };
+
+
+    //==================================================pixfmt_alpha_blend_rgb
+    template<class Blender, class RenBuf, unsigned Step, unsigned Offset = 0> 
+    class pixfmt_alpha_blend_rgb
+    {
+    public:
+        typedef pixfmt_rgb_tag pixfmt_category;
+        typedef RenBuf   rbuf_type;
+        typedef Blender  blender_type;
+        typedef typename rbuf_type::row_data row_data;
+        typedef typename blender_type::color_type color_type;
+        typedef typename blender_type::order_type order_type;
+        typedef typename color_type::value_type value_type;
+        typedef typename color_type::calc_type calc_type;
+        enum 
+        {
+            num_components = 3,
+            pix_step = Step,
+            pix_offset = Offset,
+            pix_width = sizeof(value_type) * pix_step
+        };
+        struct pixel_type
+        {
+            value_type c[num_components];
+
+            void set(value_type r, value_type g, value_type b)
+            {
+                c[order_type::R] = r;
+                c[order_type::G] = g;
+                c[order_type::B] = b;
+            }
+
+            void set(const color_type& color)
+            {
+                set(color.r, color.g, color.b);
+            }
+
+            void get(value_type& r, value_type& g, value_type& b) const
+            {
+                r = c[order_type::R];
+                g = c[order_type::G];
+                b = c[order_type::B];
+            }
+
+            color_type get() const
+            {
+                return color_type(
+                    c[order_type::R], 
+                    c[order_type::G], 
+                    c[order_type::B]);
+            }
+
+            pixel_type* next()
+            {
+                return (pixel_type*)(c + pix_step);
+            }
+
+            const pixel_type* next() const
+            {
+                return (const pixel_type*)(c + pix_step);
+            }
+
+            pixel_type* advance(int n)
+            {
+                return (pixel_type*)(c + n * pix_step);
+            }
+
+            const pixel_type* advance(int n) const
+            {
+                return (const pixel_type*)(c + n * pix_step);
+            }
+        };
+
+    private:
+        //--------------------------------------------------------------------
+        AGG_INLINE void blend_pix(pixel_type* p, 
+            value_type r, value_type g, value_type b, value_type a, 
+            unsigned cover)
+        {
+            m_blender.blend_pix(p->c, r, g, b, a, cover);
+        }
+
+        //--------------------------------------------------------------------
+        AGG_INLINE void blend_pix(pixel_type* p, 
+            value_type r, value_type g, value_type b, value_type a)
+        {
+            m_blender.blend_pix(p->c, r, g, b, a);
+        }
+
+        //--------------------------------------------------------------------
+        AGG_INLINE void blend_pix(pixel_type* p, const color_type& c, unsigned cover)
+        {
+            m_blender.blend_pix(p->c, c.r, c.g, c.b, c.a, cover);
+        }
+
+        //--------------------------------------------------------------------
+        AGG_INLINE void blend_pix(pixel_type* p, const color_type& c)
+        {
+            m_blender.blend_pix(p->c, c.r, c.g, c.b, c.a);
+        }
+
+        //--------------------------------------------------------------------
+        AGG_INLINE void copy_or_blend_pix(pixel_type* p, const color_type& c, unsigned cover)
+        {
+            if (!c.is_transparent())
+            {
+                if (c.is_opaque() && cover == cover_mask)
+                {
+                    p->set(c);
+                }
+                else
+                {
+                    blend_pix(p, c, cover);
+                }
+            }
+        }
+
+        //--------------------------------------------------------------------
+        AGG_INLINE void copy_or_blend_pix(pixel_type* p, const color_type& c)
+        {
+            if (!c.is_transparent())
+            {
+                if (c.is_opaque())
+                {
+                    p->set(c);
+                }
+                else
+                {
+                    blend_pix(p, c);
+                }
+            }
+        }
+
+    public:
+        //--------------------------------------------------------------------
+        explicit pixfmt_alpha_blend_rgb(rbuf_type& rb) :
+            m_rbuf(&rb)
+        {}
+        void attach(rbuf_type& rb) { m_rbuf = &rb; }
+
+        //--------------------------------------------------------------------
+        template<class PixFmt>
+        bool attach(PixFmt& pixf, int x1, int y1, int x2, int y2)
+        {
+            rect_i r(x1, y1, x2, y2);
+            if (r.clip(rect_i(0, 0, pixf.width()-1, pixf.height()-1)))
+            {
+                int stride = pixf.stride();
+                m_rbuf->attach(pixf.pix_ptr(r.x1, stride < 0 ? r.y2 : r.y1), 
+                               (r.x2 - r.x1) + 1,
+                               (r.y2 - r.y1) + 1,
+                               stride);
+                return true;
+            }
+            return false;
+        }
+
+        //--------------------------------------------------------------------
+        Blender& blender() { return m_blender; }
+
+        //--------------------------------------------------------------------
+        AGG_INLINE unsigned width()  const { return m_rbuf->width();  }
+        AGG_INLINE unsigned height() const { return m_rbuf->height(); }
+        AGG_INLINE int      stride() const { return m_rbuf->stride(); }
+
+        //--------------------------------------------------------------------
+        AGG_INLINE       int8u* row_ptr(int y)       { return m_rbuf->row_ptr(y); }
+        AGG_INLINE const int8u* row_ptr(int y) const { return m_rbuf->row_ptr(y); }
+        AGG_INLINE row_data     row(int y)     const { return m_rbuf->row(y); }
+
+        //--------------------------------------------------------------------
+        AGG_INLINE int8u* pix_ptr(int x, int y) 
+        { 
+            return m_rbuf->row_ptr(y) + sizeof(value_type) * (x * pix_step + pix_offset);
+        }
+
+        AGG_INLINE const int8u* pix_ptr(int x, int y) const 
+        { 
+            return m_rbuf->row_ptr(y) + sizeof(value_type) * (x * pix_step + pix_offset);
+        }
+
+        // Return pointer to pixel value, forcing row to be allocated.
+        AGG_INLINE pixel_type* pix_value_ptr(int x, int y, unsigned len) 
+        {
+            return (pixel_type*)(m_rbuf->row_ptr(x, y, len) + sizeof(value_type) * (x * pix_step + pix_offset));
+        }
+
+        // Return pointer to pixel value, or null if row not allocated.
+        AGG_INLINE const pixel_type* pix_value_ptr(int x, int y) const 
+        {
+            int8u* p = m_rbuf->row_ptr(y);
+            return p ? (pixel_type*)(p + sizeof(value_type) * (x * pix_step + pix_offset)) : 0;
+        }
+
+        // Get pixel pointer from raw buffer pointer.
+        AGG_INLINE static pixel_type* pix_value_ptr(void* p) 
+        {
+            return (pixel_type*)((value_type*)p + pix_offset);
+        }
+
+        // Get pixel pointer from raw buffer pointer.
+        AGG_INLINE static const pixel_type* pix_value_ptr(const void* p) 
+        {
+            return (const pixel_type*)((const value_type*)p + pix_offset);
+        }
+
+        //--------------------------------------------------------------------
+        AGG_INLINE static void write_plain_color(void* p, color_type c)
+        {
+            // RGB formats are implicitly premultiplied.
+            c.premultiply();
+            pix_value_ptr(p)->set(c);
+        }
+
+        //--------------------------------------------------------------------
+        AGG_INLINE static color_type read_plain_color(const void* p)
+        {
+            return pix_value_ptr(p)->get();
+        }
+
+        //--------------------------------------------------------------------
+        AGG_INLINE static void make_pix(int8u* p, const color_type& c)
+        {
+            ((pixel_type*)p)->set(c);
+        }
+
+        //--------------------------------------------------------------------
+        AGG_INLINE color_type pixel(int x, int y) const
+        {
+            if (const pixel_type* p = pix_value_ptr(x, y))
+            {
+                return p->get();
+            }
+            return color_type::no_color();
+        }
+
+        //--------------------------------------------------------------------
+        AGG_INLINE void copy_pixel(int x, int y, const color_type& c)
+        {
+            pix_value_ptr(x, y, 1)->set(c);
+        }
+
+        //--------------------------------------------------------------------
+        AGG_INLINE void blend_pixel(int x, int y, const color_type& c, int8u cover)
+        {
+            copy_or_blend_pix(pix_value_ptr(x, y, 1), c, cover);
+        }
+
+        //--------------------------------------------------------------------
+        AGG_INLINE void copy_hline(int x, int y, 
+                                   unsigned len, 
+                                   const color_type& c)
+        {
+            pixel_type* p = pix_value_ptr(x, y, len);
+            do
+            {
+                p->set(c);
+                p = p->next();
+            }
+            while(--len);
+        }
+
+
+        //--------------------------------------------------------------------
+        AGG_INLINE void copy_vline(int x, int y,
+                                   unsigned len, 
+                                   const color_type& c)
+        {
+            do
+            {
+                pix_value_ptr(x, y++, 1)->set(c);
+            }
+            while (--len);
+        }
+
+        //--------------------------------------------------------------------
+        void blend_hline(int x, int y,
+                         unsigned len, 
+                         const color_type& c,
+                         int8u cover)
+        {
+            if (!c.is_transparent())
+            {
+                pixel_type* p = pix_value_ptr(x, y, len);
+
+                if (c.is_opaque() && cover == cover_mask)
+                {
+                    do
+                    {
+                        p->set(c);
+                        p = p->next();
+                    }
+                    while (--len);
+                }
+                else
+                {
+                    do
+                    {
+                        blend_pix(p, c, cover);
+                        p = p->next();
+                    }
+                    while (--len);
+                }
+            }
+        }
+
+
+        //--------------------------------------------------------------------
+        void blend_vline(int x, int y,
+                         unsigned len, 
+                         const color_type& c,
+                         int8u cover)
+        {
+            if (!c.is_transparent())
+            {
+                if (c.is_opaque() && cover == cover_mask)
+                {
+                    do
+                    {
+                        pix_value_ptr(x, y++, 1)->set(c);
+                    }
+                    while (--len);
+                }
+                else
+                {
+                    do
+                    {
+                        blend_pix(pix_value_ptr(x, y++, 1), c, cover);
+                    }
+                    while (--len);
+                }
+            }
+        }
+
+        //--------------------------------------------------------------------
+        void blend_solid_hspan(int x, int y,
+                               unsigned len, 
+                               const color_type& c,
+                               const int8u* covers)
+        {
+            if (!c.is_transparent())
+            {
+                pixel_type* p = pix_value_ptr(x, y, len);
+
+                do 
+                {
+                    if (c.is_opaque() && *covers == cover_mask)
+                    {
+                        p->set(c);
+                    }
+                    else
+                    {
+                        blend_pix(p, c, *covers);
+                    }
+                    p = p->next();
+                    ++covers;
+                }
+                while (--len);
+            }
+        }
+
+
+        //--------------------------------------------------------------------
+        void blend_solid_vspan(int x, int y,
+                               unsigned len, 
+                               const color_type& c,
+                               const int8u* covers)
+        {
+            if (!c.is_transparent())
+            {
+                do 
+                {
+                    pixel_type* p = pix_value_ptr(x, y++, 1);
+
+                    if (c.is_opaque() && *covers == cover_mask)
+                    {
+                        p->set(c);
+                    }
+                    else
+                    {
+                        blend_pix(p, c, *covers);
+                    }
+                    ++covers;
+                }
+                while (--len);
+            }
+        }
+
+        //--------------------------------------------------------------------
+        void copy_color_hspan(int x, int y,
+                              unsigned len, 
+                              const color_type* colors)
+        {
+            pixel_type* p = pix_value_ptr(x, y, len);
+
+            do 
+            {
+                p->set(*colors++);
+                p = p->next();
+            }
+            while (--len);
+        }
+
+
+        //--------------------------------------------------------------------
+        void copy_color_vspan(int x, int y,
+                              unsigned len, 
+                              const color_type* colors)
+        {
+            do 
+            {
+                pix_value_ptr(x, y++, 1)->set(*colors++);
+            }
+            while (--len);
+        }
+
+        //--------------------------------------------------------------------
+        void blend_color_hspan(int x, int y,
+                               unsigned len, 
+                               const color_type* colors,
+                               const int8u* covers,
+                               int8u cover)
+        {
+            pixel_type* p = pix_value_ptr(x, y, len);
+
+            if (covers)
+            {
+                do 
+                {
+                    copy_or_blend_pix(p, *colors++, *covers++);
+                    p = p->next();
+                }
+                while (--len);
+            }
+            else
+            {
+                if (cover == cover_mask)
+                {
+                    do 
+                    {
+                        copy_or_blend_pix(p, *colors++);
+                        p = p->next();
+                    }
+                    while (--len);
+                }
+                else
+                {
+                    do 
+                    {
+                        copy_or_blend_pix(p, *colors++, cover);
+                        p = p->next();
+                    }
+                    while (--len);
+                }
+            }
+        }
+
+        //--------------------------------------------------------------------
+        void blend_color_vspan(int x, int y,
+                               unsigned len, 
+                               const color_type* colors,
+                               const int8u* covers,
+                               int8u cover)
+        {
+            if (covers)
+            {
+                do 
+                {
+                    copy_or_blend_pix(pix_value_ptr(x, y++, 1), *colors++, *covers++);
+                }
+                while (--len);
+            }
+            else
+            {
+                if (cover == cover_mask)
+                {
+                    do 
+                    {
+                        copy_or_blend_pix(pix_value_ptr(x, y++, 1), *colors++);
+                    }
+                    while (--len);
+                }
+                else
+                {
+                    do 
+                    {
+                        copy_or_blend_pix(pix_value_ptr(x, y++, 1), *colors++, cover);
+                    }
+                    while (--len);
+                }
+            }
+        }
+
+        //--------------------------------------------------------------------
+        template<class Function> void for_each_pixel(Function f)
+        {
+            for (unsigned y = 0; y < height(); ++y)
+            {
+                row_data r = m_rbuf->row(y);
+                if (r.ptr)
+                {
+                    unsigned len = r.x2 - r.x1 + 1;
+                    pixel_type* p = pix_value_ptr(r.x1, y, len);
+                    do
+                    {
+                        f(p->c);
+                        p = p->next();
+                    }
+                    while (--len);
+                }
+            }
+        }
+
+        //--------------------------------------------------------------------
+        template<class GammaLut> void apply_gamma_dir(const GammaLut& g)
+        {
+            for_each_pixel(apply_gamma_dir_rgb<color_type, order_type, GammaLut>(g));
+        }
+
+        //--------------------------------------------------------------------
+        template<class GammaLut> void apply_gamma_inv(const GammaLut& g)
+        {
+            for_each_pixel(apply_gamma_inv_rgb<color_type, order_type, GammaLut>(g));
+        }
+
+        //--------------------------------------------------------------------
+        template<class RenBuf2>
+        void copy_from(const RenBuf2& from, 
+                       int xdst, int ydst,
+                       int xsrc, int ysrc,
+                       unsigned len)
+        {
+            if (const int8u* p = from.row_ptr(ysrc))
+            {
+                std::memmove(m_rbuf->row_ptr(xdst, ydst, len) + xdst * pix_width, 
+                        p + xsrc * pix_width, 
+                        len * pix_width);
+            }
+        }
+
+        //--------------------------------------------------------------------
+        // Blend from an RGBA surface.
+        template<class SrcPixelFormatRenderer>
+        void blend_from(const SrcPixelFormatRenderer& from, 
+                        int xdst, int ydst,
+                        int xsrc, int ysrc,
+                        unsigned len,
+                        int8u cover)
+        {
+            typedef typename SrcPixelFormatRenderer::pixel_type src_pixel_type;
+            typedef typename SrcPixelFormatRenderer::order_type src_order;
+
+            if (const src_pixel_type* psrc = from.pix_value_ptr(xsrc, ysrc))
+            {
+                pixel_type* pdst = pix_value_ptr(xdst, ydst, len);
+
+                if (cover == cover_mask)
+                {
+                    do 
+                    {
+                        value_type alpha = psrc->c[src_order::A];
+                        if (alpha <= color_type::empty_value())
+                        {
+                            if (alpha >= color_type::full_value())
+                            {
+                                pdst->c[order_type::R] = psrc->c[src_order::R];
+                                pdst->c[order_type::G] = psrc->c[src_order::G];
+                                pdst->c[order_type::B] = psrc->c[src_order::B];
+                            }
+                            else
+                            {
+                                blend_pix(pdst, 
+                                    psrc->c[src_order::R],
+                                    psrc->c[src_order::G],
+                                    psrc->c[src_order::B],
+                                    alpha);
+                            }
+                        }
+                        psrc = psrc->next();
+                        pdst = pdst->next();
+                    }
+                    while(--len);
+                }
+                else
+                {
+                    do 
+                    {
+                        copy_or_blend_pix(pdst, psrc->get(), cover);
+                        psrc = psrc->next();
+                        pdst = pdst->next();
+                    }
+                    while (--len);
+                }
+            }
+        }
+
+        //--------------------------------------------------------------------
+        // Blend from single color, using grayscale surface as alpha channel.
+        template<class SrcPixelFormatRenderer>
+        void blend_from_color(const SrcPixelFormatRenderer& from, 
+                              const color_type& color,
+                              int xdst, int ydst,
+                              int xsrc, int ysrc,
+                              unsigned len,
+                              int8u cover)
+        {
+            typedef typename SrcPixelFormatRenderer::pixel_type src_pixel_type;
+            typedef typename SrcPixelFormatRenderer::color_type src_color_type;
+
+            if (const src_pixel_type* psrc = from.pix_value_ptr(xsrc, ysrc))
+            {
+                pixel_type* pdst = pix_value_ptr(xdst, ydst, len);
+
+                do 
+                {
+                    copy_or_blend_pix(pdst, color, src_color_type::scale_cover(cover, psrc->c[0]));
+                    psrc = psrc->next();
+                    pdst = pdst->next();
+                }
+                while (--len);
+            }
+        }
+
+        //--------------------------------------------------------------------
+        // Blend from color table, using grayscale surface as indexes into table. 
+        // Obviously, this only works for integer value types.
+        template<class SrcPixelFormatRenderer>
+        void blend_from_lut(const SrcPixelFormatRenderer& from, 
+                            const color_type* color_lut,
+                            int xdst, int ydst,
+                            int xsrc, int ysrc,
+                            unsigned len,
+                            int8u cover)
+        {
+            typedef typename SrcPixelFormatRenderer::pixel_type src_pixel_type;
+
+            if (const src_pixel_type* psrc = from.pix_value_ptr(xsrc, ysrc))
+            {
+                pixel_type* pdst = pix_value_ptr(xdst, ydst, len);
+
+                if (cover == cover_mask)
+                {
+                    do 
+                    {
+                        const color_type& color = color_lut[psrc->c[0]];
+                        blend_pix(pdst, color);
+                        psrc = psrc->next();
+                        pdst = pdst->next();
+                    }
+                    while(--len);
+                }
+                else
+                {
+                    do 
+                    {
+                        copy_or_blend_pix(pdst, color_lut[psrc->c[0]], cover);
+                        psrc = psrc->next();
+                        pdst = pdst->next();
+                    }
+                    while(--len);
+                }
+            }
+        }
+
+    private:
+        rbuf_type* m_rbuf;
+        Blender    m_blender;
+    };
+    
+    //-----------------------------------------------------------------------
+    typedef blender_rgb<rgba8, order_rgb> blender_rgb24;
+    typedef blender_rgb<rgba8, order_bgr> blender_bgr24;
+    typedef blender_rgb<srgba8, order_rgb> blender_srgb24;
+    typedef blender_rgb<srgba8, order_bgr> blender_sbgr24;
+    typedef blender_rgb<rgba16, order_rgb> blender_rgb48;
+    typedef blender_rgb<rgba16, order_bgr> blender_bgr48;
+    typedef blender_rgb<rgba32, order_rgb> blender_rgb96;
+    typedef blender_rgb<rgba32, order_bgr> blender_bgr96;
+
+    typedef blender_rgb_pre<rgba8, order_rgb> blender_rgb24_pre;
+    typedef blender_rgb_pre<rgba8, order_bgr> blender_bgr24_pre;
+    typedef blender_rgb_pre<srgba8, order_rgb> blender_srgb24_pre;
+    typedef blender_rgb_pre<srgba8, order_bgr> blender_sbgr24_pre;
+    typedef blender_rgb_pre<rgba16, order_rgb> blender_rgb48_pre;
+    typedef blender_rgb_pre<rgba16, order_bgr> blender_bgr48_pre;
+    typedef blender_rgb_pre<rgba32, order_rgb> blender_rgb96_pre;
+    typedef blender_rgb_pre<rgba32, order_bgr> blender_bgr96_pre;
+
+    typedef pixfmt_alpha_blend_rgb<blender_rgb24, rendering_buffer, 3> pixfmt_rgb24;
+    typedef pixfmt_alpha_blend_rgb<blender_bgr24, rendering_buffer, 3> pixfmt_bgr24;
+    typedef pixfmt_alpha_blend_rgb<blender_srgb24, rendering_buffer, 3> pixfmt_srgb24;
+    typedef pixfmt_alpha_blend_rgb<blender_sbgr24, rendering_buffer, 3> pixfmt_sbgr24;
+    typedef pixfmt_alpha_blend_rgb<blender_rgb48, rendering_buffer, 3> pixfmt_rgb48;
+    typedef pixfmt_alpha_blend_rgb<blender_bgr48, rendering_buffer, 3> pixfmt_bgr48;
+    typedef pixfmt_alpha_blend_rgb<blender_rgb96, rendering_buffer, 3> pixfmt_rgb96;
+    typedef pixfmt_alpha_blend_rgb<blender_bgr96, rendering_buffer, 3> pixfmt_bgr96;
+
+    typedef pixfmt_alpha_blend_rgb<blender_rgb24_pre, rendering_buffer, 3> pixfmt_rgb24_pre;
+    typedef pixfmt_alpha_blend_rgb<blender_bgr24_pre, rendering_buffer, 3> pixfmt_bgr24_pre;
+    typedef pixfmt_alpha_blend_rgb<blender_srgb24_pre, rendering_buffer, 3> pixfmt_srgb24_pre;
+    typedef pixfmt_alpha_blend_rgb<blender_sbgr24_pre, rendering_buffer, 3> pixfmt_sbgr24_pre;
+    typedef pixfmt_alpha_blend_rgb<blender_rgb48_pre, rendering_buffer, 3> pixfmt_rgb48_pre;
+    typedef pixfmt_alpha_blend_rgb<blender_bgr48_pre, rendering_buffer, 3> pixfmt_bgr48_pre;
+    typedef pixfmt_alpha_blend_rgb<blender_rgb96_pre, rendering_buffer, 3> pixfmt_rgb96_pre;
+    typedef pixfmt_alpha_blend_rgb<blender_bgr96_pre, rendering_buffer, 3> pixfmt_bgr96_pre;
+
+    typedef pixfmt_alpha_blend_rgb<blender_rgb24, rendering_buffer, 4, 0> pixfmt_rgbx32;
+    typedef pixfmt_alpha_blend_rgb<blender_rgb24, rendering_buffer, 4, 1> pixfmt_xrgb32;
+    typedef pixfmt_alpha_blend_rgb<blender_bgr24, rendering_buffer, 4, 1> pixfmt_xbgr32;
+    typedef pixfmt_alpha_blend_rgb<blender_bgr24, rendering_buffer, 4, 0> pixfmt_bgrx32;
+    typedef pixfmt_alpha_blend_rgb<blender_srgb24, rendering_buffer, 4, 0> pixfmt_srgbx32;
+    typedef pixfmt_alpha_blend_rgb<blender_srgb24, rendering_buffer, 4, 1> pixfmt_sxrgb32;
+    typedef pixfmt_alpha_blend_rgb<blender_sbgr24, rendering_buffer, 4, 1> pixfmt_sxbgr32;
+    typedef pixfmt_alpha_blend_rgb<blender_sbgr24, rendering_buffer, 4, 0> pixfmt_sbgrx32;
+    typedef pixfmt_alpha_blend_rgb<blender_rgb48, rendering_buffer, 4, 0> pixfmt_rgbx64;
+    typedef pixfmt_alpha_blend_rgb<blender_rgb48, rendering_buffer, 4, 1> pixfmt_xrgb64;
+    typedef pixfmt_alpha_blend_rgb<blender_bgr48, rendering_buffer, 4, 1> pixfmt_xbgr64;
+    typedef pixfmt_alpha_blend_rgb<blender_bgr48, rendering_buffer, 4, 0> pixfmt_bgrx64;
+    typedef pixfmt_alpha_blend_rgb<blender_rgb96, rendering_buffer, 4, 0> pixfmt_rgbx128;
+    typedef pixfmt_alpha_blend_rgb<blender_rgb96, rendering_buffer, 4, 1> pixfmt_xrgb128;
+    typedef pixfmt_alpha_blend_rgb<blender_bgr96, rendering_buffer, 4, 1> pixfmt_xbgr128;
+    typedef pixfmt_alpha_blend_rgb<blender_bgr96, rendering_buffer, 4, 0> pixfmt_bgrx128;
+
+    typedef pixfmt_alpha_blend_rgb<blender_rgb24_pre, rendering_buffer, 4, 0> pixfmt_rgbx32_pre;
+    typedef pixfmt_alpha_blend_rgb<blender_rgb24_pre, rendering_buffer, 4, 1> pixfmt_xrgb32_pre;
+    typedef pixfmt_alpha_blend_rgb<blender_bgr24_pre, rendering_buffer, 4, 1> pixfmt_xbgr32_pre;
+    typedef pixfmt_alpha_blend_rgb<blender_bgr24_pre, rendering_buffer, 4, 0> pixfmt_bgrx32_pre;
+    typedef pixfmt_alpha_blend_rgb<blender_srgb24_pre, rendering_buffer, 4, 0> pixfmt_srgbx32_pre;
+    typedef pixfmt_alpha_blend_rgb<blender_srgb24_pre, rendering_buffer, 4, 1> pixfmt_sxrgb32_pre;
+    typedef pixfmt_alpha_blend_rgb<blender_sbgr24_pre, rendering_buffer, 4, 1> pixfmt_sxbgr32_pre;
+    typedef pixfmt_alpha_blend_rgb<blender_sbgr24_pre, rendering_buffer, 4, 0> pixfmt_sbgrx32_pre;
+    typedef pixfmt_alpha_blend_rgb<blender_rgb48_pre, rendering_buffer, 4, 0> pixfmt_rgbx64_pre;
+    typedef pixfmt_alpha_blend_rgb<blender_rgb48_pre, rendering_buffer, 4, 1> pixfmt_xrgb64_pre;
+    typedef pixfmt_alpha_blend_rgb<blender_bgr48_pre, rendering_buffer, 4, 1> pixfmt_xbgr64_pre;
+    typedef pixfmt_alpha_blend_rgb<blender_bgr48_pre, rendering_buffer, 4, 0> pixfmt_bgrx64_pre;
+    typedef pixfmt_alpha_blend_rgb<blender_rgb96_pre, rendering_buffer, 4, 0> pixfmt_rgbx128_pre;
+    typedef pixfmt_alpha_blend_rgb<blender_rgb96_pre, rendering_buffer, 4, 1> pixfmt_xrgb128_pre;
+    typedef pixfmt_alpha_blend_rgb<blender_bgr96_pre, rendering_buffer, 4, 1> pixfmt_xbgr128_pre;
+    typedef pixfmt_alpha_blend_rgb<blender_bgr96_pre, rendering_buffer, 4, 0> pixfmt_bgrx128_pre;
+    
+
+    //-----------------------------------------------------pixfmt_rgb24_gamma
+    template<class Gamma> class pixfmt_rgb24_gamma : 
+    public pixfmt_alpha_blend_rgb<blender_rgb_gamma<rgba8, order_rgb, Gamma>, rendering_buffer, 3>
+    {
+    public:
+        pixfmt_rgb24_gamma(rendering_buffer& rb, const Gamma& g) :
+            pixfmt_alpha_blend_rgb<blender_rgb_gamma<rgba8, order_rgb, Gamma>, rendering_buffer, 3>(rb) 
+        {
+            this->blender().gamma(g);
+        }
+    };
+        
+    //-----------------------------------------------------pixfmt_srgb24_gamma
+    template<class Gamma> class pixfmt_srgb24_gamma : 
+    public pixfmt_alpha_blend_rgb<blender_rgb_gamma<srgba8, order_rgb, Gamma>, rendering_buffer, 3>
+    {
+    public:
+        pixfmt_srgb24_gamma(rendering_buffer& rb, const Gamma& g) :
+            pixfmt_alpha_blend_rgb<blender_rgb_gamma<srgba8, order_rgb, Gamma>, rendering_buffer, 3>(rb) 
+        {
+            this->blender().gamma(g);
+        }
+    };
+        
+    //-----------------------------------------------------pixfmt_bgr24_gamma
+    template<class Gamma> class pixfmt_bgr24_gamma : 
+    public pixfmt_alpha_blend_rgb<blender_rgb_gamma<rgba8, order_bgr, Gamma>, rendering_buffer, 3>
+    {
+    public:
+        pixfmt_bgr24_gamma(rendering_buffer& rb, const Gamma& g) :
+            pixfmt_alpha_blend_rgb<blender_rgb_gamma<rgba8, order_bgr, Gamma>, rendering_buffer, 3>(rb) 
+        {
+            this->blender().gamma(g);
+        }
+    };
+
+    //-----------------------------------------------------pixfmt_sbgr24_gamma
+    template<class Gamma> class pixfmt_sbgr24_gamma : 
+    public pixfmt_alpha_blend_rgb<blender_rgb_gamma<srgba8, order_bgr, Gamma>, rendering_buffer, 3>
+    {
+    public:
+        pixfmt_sbgr24_gamma(rendering_buffer& rb, const Gamma& g) :
+            pixfmt_alpha_blend_rgb<blender_rgb_gamma<srgba8, order_bgr, Gamma>, rendering_buffer, 3>(rb) 
+        {
+            this->blender().gamma(g);
+        }
+    };
+
+    //-----------------------------------------------------pixfmt_rgb48_gamma
+    template<class Gamma> class pixfmt_rgb48_gamma : 
+    public pixfmt_alpha_blend_rgb<blender_rgb_gamma<rgba16, order_rgb, Gamma>, rendering_buffer, 3>
+    {
+    public:
+        pixfmt_rgb48_gamma(rendering_buffer& rb, const Gamma& g) :
+            pixfmt_alpha_blend_rgb<blender_rgb_gamma<rgba16, order_rgb, Gamma>, rendering_buffer, 3>(rb) 
+        {
+            this->blender().gamma(g);
+        }
+    };
+        
+    //-----------------------------------------------------pixfmt_bgr48_gamma
+    template<class Gamma> class pixfmt_bgr48_gamma : 
+    public pixfmt_alpha_blend_rgb<blender_rgb_gamma<rgba16, order_bgr, Gamma>, rendering_buffer, 3>
+    {
+    public:
+        pixfmt_bgr48_gamma(rendering_buffer& rb, const Gamma& g) :
+            pixfmt_alpha_blend_rgb<blender_rgb_gamma<rgba16, order_bgr, Gamma>, rendering_buffer, 3>(rb) 
+        {
+            this->blender().gamma(g);
+        }
+    };
+    
+}
+
+#endif
+
--- a/dep/agg/include/agg_pixfmt_rgb_packed.h
+++ b/dep/agg/include/agg_pixfmt_rgb_packed.h
--- a/dep/agg/include/agg_pixfmt_rgba.h
+++ b/dep/agg/include/agg_pixfmt_rgba.h
--- a/dep/agg/include/agg_pixfmt_transposer.h
+++ b/dep/agg/include/agg_pixfmt_transposer.h
@@ -0,0 +1,157 @@
+//----------------------------------------------------------------------------
+// Anti-Grain Geometry - Version 2.4
+// Copyright (C) 2002-2005 Maxim Shemanarev (http://www.antigrain.com)
+//
+// Permission to copy, use, modify, sell and distribute this software 
+// is granted provided this copyright notice appears in all copies. 
+// This software is provided "as is" without express or implied
+// warranty, and with no claim as to its suitability for any purpose.
+//
+//----------------------------------------------------------------------------
+// Contact: mcseem@antigrain.com
+//          mcseemagg@yahoo.com
+//          http://www.antigrain.com
+//----------------------------------------------------------------------------
+
+#ifndef AGG_PIXFMT_TRANSPOSER_INCLUDED
+#define AGG_PIXFMT_TRANSPOSER_INCLUDED
+
+#include "agg_basics.h"
+
+namespace agg
+{
+    //=======================================================pixfmt_transposer
+    template<class PixFmt> class pixfmt_transposer
+    {
+    public:
+        typedef PixFmt pixfmt_type;
+        typedef typename pixfmt_type::color_type color_type;
+        typedef typename pixfmt_type::row_data row_data;
+        typedef typename color_type::value_type value_type;
+        typedef typename color_type::calc_type calc_type;
+
+        //--------------------------------------------------------------------
+        pixfmt_transposer() : m_pixf(0) {}
+        explicit pixfmt_transposer(pixfmt_type& pixf) : m_pixf(&pixf) {}
+        void attach(pixfmt_type& pixf) { m_pixf = &pixf; }
+
+        //--------------------------------------------------------------------
+        AGG_INLINE unsigned width()  const { return m_pixf->height();  }
+        AGG_INLINE unsigned height() const { return m_pixf->width(); }
+
+        //--------------------------------------------------------------------
+        AGG_INLINE color_type pixel(int x, int y) const
+        {
+            return m_pixf->pixel(y, x);
+        }
+
+        //--------------------------------------------------------------------
+        AGG_INLINE void copy_pixel(int x, int y, const color_type& c)
+        {
+            m_pixf->copy_pixel(y, x, c);
+        }
+
+        //--------------------------------------------------------------------
+        AGG_INLINE void blend_pixel(int x, int y, 
+                                    const color_type& c, 
+                                    int8u cover)
+        {
+            m_pixf->blend_pixel(y, x, c, cover);
+        }
+
+        //--------------------------------------------------------------------
+        AGG_INLINE void copy_hline(int x, int y, 
+                                   unsigned len, 
+                                   const color_type& c)
+        {
+            m_pixf->copy_vline(y, x, len, c);
+        }
+
+        //--------------------------------------------------------------------
+        AGG_INLINE void copy_vline(int x, int y,
+                                   unsigned len, 
+                                   const color_type& c)
+        {
+            m_pixf->copy_hline(y, x, len, c);
+        }
+
+        //--------------------------------------------------------------------
+        AGG_INLINE void blend_hline(int x, int y,
+                                    unsigned len, 
+                                    const color_type& c,
+                                    int8u cover)
+        {
+            m_pixf->blend_vline(y, x, len, c, cover);
+        }
+
+        //--------------------------------------------------------------------
+        AGG_INLINE void blend_vline(int x, int y,
+                                    unsigned len, 
+                                    const color_type& c,
+                                    int8u cover)
+        {
+            m_pixf->blend_hline(y, x, len, c, cover);
+        }
+
+        //--------------------------------------------------------------------
+        AGG_INLINE void blend_solid_hspan(int x, int y,
+                                          unsigned len, 
+                                          const color_type& c,
+                                          const int8u* covers)
+        {
+            m_pixf->blend_solid_vspan(y, x, len, c, covers);
+        }
+
+        //--------------------------------------------------------------------
+        AGG_INLINE void blend_solid_vspan(int x, int y,
+                                          unsigned len, 
+                                          const color_type& c,
+                                          const int8u* covers)
+        {
+            m_pixf->blend_solid_hspan(y, x, len, c, covers);
+        }
+
+        //--------------------------------------------------------------------
+        AGG_INLINE void copy_color_hspan(int x, int y,
+                                         unsigned len, 
+                                         const color_type* colors)
+        {
+            m_pixf->copy_color_vspan(y, x, len, colors);
+        }
+
+        //--------------------------------------------------------------------
+        AGG_INLINE void copy_color_vspan(int x, int y,
+                                         unsigned len, 
+                                         const color_type* colors)
+        {
+            m_pixf->copy_color_hspan(y, x, len, colors);
+        }
+
+        //--------------------------------------------------------------------
+        AGG_INLINE void blend_color_hspan(int x, int y,
+                                          unsigned len, 
+                                          const color_type* colors,
+                                          const int8u* covers,
+                                          int8u cover)
+        {
+            m_pixf->blend_color_vspan(y, x, len, colors, covers, cover);
+        }
+
+        //--------------------------------------------------------------------
+        AGG_INLINE void blend_color_vspan(int x, int y,
+                               unsigned len, 
+                               const color_type* colors,
+                               const int8u* covers,
+                               int8u cover)
+        {
+            m_pixf->blend_color_hspan(y, x, len, colors, covers, cover);
+        }
+
+    private:
+        pixfmt_type* m_pixf;
+    };
+}
+
+#endif
+
+
--- a/dep/agg/include/agg_rasterizer_cells_aa.h
+++ b/dep/agg/include/agg_rasterizer_cells_aa.h
@@ -0,0 +1,742 @@
+//----------------------------------------------------------------------------
+// Anti-Grain Geometry - Version 2.4
+// Copyright (C) 2002-2005 Maxim Shemanarev (http://www.antigrain.com)
+//
+// Permission to copy, use, modify, sell and distribute this software 
+// is granted provided this copyright notice appears in all copies. 
+// This software is provided "as is" without express or implied
+// warranty, and with no claim as to its suitability for any purpose.
+//
+//----------------------------------------------------------------------------
+//
+// The author gratefully acknowleges the support of David Turner, 
+// Robert Wilhelm, and Werner Lemberg - the authors of the FreeType 
+// libray - in producing this work. See http://www.freetype.org for details.
+//
+//----------------------------------------------------------------------------
+// Contact: mcseem@antigrain.com
+//          mcseemagg@yahoo.com
+//          http://www.antigrain.com
+//----------------------------------------------------------------------------
+//
+// Adaptation for 32-bit screen coordinates has been sponsored by 
+// Liberty Technology Systems, Inc., visit http://lib-sys.com
+//
+// Liberty Technology Systems, Inc. is the provider of
+// PostScript and PDF technology for software developers.
+// 
+//----------------------------------------------------------------------------
+#ifndef AGG_RASTERIZER_CELLS_AA_INCLUDED
+#define AGG_RASTERIZER_CELLS_AA_INCLUDED
+
+#include <cstring>
+#include <cstdlib>
+#include <limits>
+#include "agg_math.h"
+#include "agg_array.h"
+
+
+namespace agg
+{
+
+    //-----------------------------------------------------rasterizer_cells_aa
+    // An internal class that implements the main rasterization algorithm.
+    // Used in the rasterizer. Should not be used direcly.
+    template<class Cell> class rasterizer_cells_aa
+    {
+        enum cell_block_scale_e
+        {
+            cell_block_shift = 12,
+            cell_block_size  = 1 << cell_block_shift,
+            cell_block_mask  = cell_block_size - 1,
+            cell_block_pool  = 256
+        };
+
+        struct sorted_y
+        {
+            unsigned start;
+            unsigned num;
+        };
+
+    public:
+        typedef Cell cell_type;
+        typedef rasterizer_cells_aa<Cell> self_type;
+
+        ~rasterizer_cells_aa();
+        rasterizer_cells_aa(unsigned cell_block_limit=1024);
+
+        void reset();
+        void style(const cell_type& style_cell);
+        void line(int x1, int y1, int x2, int y2);
+
+        int min_x() const { return m_min_x; }
+        int min_y() const { return m_min_y; }
+        int max_x() const { return m_max_x; }
+        int max_y() const { return m_max_y; }
+
+        void sort_cells();
+
+        unsigned total_cells() const 
+        {
+            return m_num_cells;
+        }
+
+        unsigned scanline_num_cells(unsigned y) const 
+        { 
+            return m_sorted_y[y - m_min_y].num; 
+        }
+
+        const cell_type* const* scanline_cells(unsigned y) const
+        { 
+            return m_sorted_cells.data() + m_sorted_y[y - m_min_y].start; 
+        }
+
+        bool sorted() const { return m_sorted; }
+
+    private:
+        rasterizer_cells_aa(const self_type&);
+        const self_type& operator = (const self_type&);
+
+        void set_curr_cell(int x, int y);
+        void add_curr_cell();
+        void render_hline(int ey, int x1, int y1, int x2, int y2);
+        void allocate_block();
+        
+    private:
+        unsigned                m_num_blocks;
+        unsigned                m_max_blocks;
+        unsigned                m_curr_block;
+        unsigned                m_num_cells;
+	unsigned                m_cell_block_limit;
+        cell_type**             m_cells;
+        cell_type*              m_curr_cell_ptr;
+        pod_vector<cell_type*>  m_sorted_cells;
+        pod_vector<sorted_y>    m_sorted_y;
+        cell_type               m_curr_cell;
+        cell_type               m_style_cell;
+        int                     m_min_x;
+        int                     m_min_y;
+        int                     m_max_x;
+        int                     m_max_y;
+        bool                    m_sorted;
+    };
+
+
+
+
+    //------------------------------------------------------------------------
+    template<class Cell> 
+    rasterizer_cells_aa<Cell>::~rasterizer_cells_aa()
+    {
+        if(m_num_blocks)
+        {
+            cell_type** ptr = m_cells + m_num_blocks - 1;
+            while(m_num_blocks--)
+            {
+                pod_allocator<cell_type>::deallocate(*ptr, cell_block_size);
+                ptr--;
+            }
+            pod_allocator<cell_type*>::deallocate(m_cells, m_max_blocks);
+        }
+    }
+
+    //------------------------------------------------------------------------
+    template<class Cell> 
+    rasterizer_cells_aa<Cell>::rasterizer_cells_aa(unsigned cell_block_limit) :
+        m_num_blocks(0),
+        m_max_blocks(0),
+        m_curr_block(0),
+        m_num_cells(0),
+	m_cell_block_limit(cell_block_limit),
+        m_cells(0),
+        m_curr_cell_ptr(0),
+        m_sorted_cells(),
+        m_sorted_y(),
+        m_min_x(std::numeric_limits<int>::max()),
+        m_min_y(std::numeric_limits<int>::max()),
+        m_max_x(std::numeric_limits<int>::min()),
+        m_max_y(std::numeric_limits<int>::min()),
+        m_sorted(false)
+    {
+        m_style_cell.initial();
+        m_curr_cell.initial();
+    }
+
+    //------------------------------------------------------------------------
+    template<class Cell> 
+    void rasterizer_cells_aa<Cell>::reset()
+    {
+        m_num_cells = 0; 
+        m_curr_block = 0;
+        m_curr_cell.initial();
+        m_style_cell.initial();
+        m_sorted = false;
+        m_min_x = std::numeric_limits<int>::max();
+        m_min_y = std::numeric_limits<int>::max();
+        m_max_x = std::numeric_limits<int>::min();
+        m_max_y = std::numeric_limits<int>::min();
+    }
+
+    //------------------------------------------------------------------------
+    template<class Cell> 
+    AGG_INLINE void rasterizer_cells_aa<Cell>::add_curr_cell()
+    {
+        if(m_curr_cell.area | m_curr_cell.cover)
+        {
+            if((m_num_cells & cell_block_mask) == 0)
+            {
+                if(m_num_blocks >= m_cell_block_limit) return;
+                allocate_block();
+            }
+            *m_curr_cell_ptr++ = m_curr_cell;
+            ++m_num_cells;
+        }
+    }
+
+    //------------------------------------------------------------------------
+    template<class Cell> 
+    AGG_INLINE void rasterizer_cells_aa<Cell>::set_curr_cell(int x, int y)
+    {
+        if(m_curr_cell.not_equal(x, y, m_style_cell))
+        {
+            add_curr_cell();
+            m_curr_cell.style(m_style_cell);
+            m_curr_cell.x     = x;
+            m_curr_cell.y     = y;
+            m_curr_cell.cover = 0;
+            m_curr_cell.area  = 0;
+        }
+    }
+
+    //------------------------------------------------------------------------
+    template<class Cell> 
+    AGG_INLINE void rasterizer_cells_aa<Cell>::render_hline(int ey, 
+                                                            int x1, int y1, 
+                                                            int x2, int y2)
+    {
+        int ex1 = x1 >> poly_subpixel_shift;
+        int ex2 = x2 >> poly_subpixel_shift;
+        int fx1 = x1 & poly_subpixel_mask;
+        int fx2 = x2 & poly_subpixel_mask;
+
+        int delta, p, first;
+        long long dx;
+        int incr, lift, mod, rem;
+
+        //trivial case. Happens often
+        if(y1 == y2)
+        {
+            set_curr_cell(ex2, ey);
+            return;
+        }
+
+        //everything is located in a single cell.  That is easy!
+        if(ex1 == ex2)
+        {
+            delta = y2 - y1;
+            m_curr_cell.cover += delta;
+            m_curr_cell.area  += (fx1 + fx2) * delta;
+            return;
+        }
+
+        //ok, we'll have to render a run of adjacent cells on the same
+        //hline...
+        p     = (poly_subpixel_scale - fx1) * (y2 - y1);
+        first = poly_subpixel_scale;
+        incr  = 1;
+
+        dx = (long long)x2 - (long long)x1;
+
+        if(dx < 0)
+        {
+            p     = fx1 * (y2 - y1);
+            first = 0;
+            incr  = -1;
+            dx    = -dx;
+        }
+
+        delta = (int)(p / dx);
+        mod   = (int)(p % dx);
+
+        if(mod < 0)
+        {
+            delta--;
+            mod += dx;
+        }
+
+        m_curr_cell.cover += delta;
+        m_curr_cell.area  += (fx1 + first) * delta;
+
+        ex1 += incr;
+        set_curr_cell(ex1, ey);
+        y1  += delta;
+
+        if(ex1 != ex2)
+        {
+            p     = poly_subpixel_scale * (y2 - y1 + delta);
+            lift  = (int)(p / dx);
+            rem   = (int)(p % dx);
+
+            if (rem < 0)
+            {
+                lift--;
+                rem += dx;
+            }
+
+            mod -= dx;
+
+            while (ex1 != ex2)
+            {
+                delta = lift;
+                mod  += rem;
+                if(mod >= 0)
+                {
+                    mod -= dx;
+                    delta++;
+                }
+
+                m_curr_cell.cover += delta;
+                m_curr_cell.area  += poly_subpixel_scale * delta;
+                y1  += delta;
+                ex1 += incr;
+                set_curr_cell(ex1, ey);
+            }
+        }
+        delta = y2 - y1;
+        m_curr_cell.cover += delta;
+        m_curr_cell.area  += (fx2 + poly_subpixel_scale - first) * delta;
+    }
+
+    //------------------------------------------------------------------------
+    template<class Cell> 
+    AGG_INLINE void rasterizer_cells_aa<Cell>::style(const cell_type& style_cell)
+    { 
+        m_style_cell.style(style_cell); 
+    }
+
+    //------------------------------------------------------------------------
+    template<class Cell> 
+    void rasterizer_cells_aa<Cell>::line(int x1, int y1, int x2, int y2)
+    {
+        enum dx_limit_e { dx_limit = 16384 << poly_subpixel_shift };
+
+        long long dx = (long long)x2 - (long long)x1;
+
+        if(dx >= dx_limit || dx <= -dx_limit)
+        {
+            int cx = (int)(((long long)x1 + (long long)x2) >> 1);
+            int cy = (int)(((long long)y1 + (long long)y2) >> 1);
+            line(x1, y1, cx, cy);
+            line(cx, cy, x2, y2);
+        }
+
+        long long dy = (long long)y2 - (long long)y1;
+        int ex1 = x1 >> poly_subpixel_shift;
+        int ex2 = x2 >> poly_subpixel_shift;
+        int ey1 = y1 >> poly_subpixel_shift;
+        int ey2 = y2 >> poly_subpixel_shift;
+        int fy1 = y1 & poly_subpixel_mask;
+        int fy2 = y2 & poly_subpixel_mask;
+
+        int x_from, x_to;
+        int rem, mod, lift, delta, first, incr;
+        long long p;
+
+        if(ex1 < m_min_x) m_min_x = ex1;
+        if(ex1 > m_max_x) m_max_x = ex1;
+        if(ey1 < m_min_y) m_min_y = ey1;
+        if(ey1 > m_max_y) m_max_y = ey1;
+        if(ex2 < m_min_x) m_min_x = ex2;
+        if(ex2 > m_max_x) m_max_x = ex2;
+        if(ey2 < m_min_y) m_min_y = ey2;
+        if(ey2 > m_max_y) m_max_y = ey2;
+
+        set_curr_cell(ex1, ey1);
+
+        //everything is on a single hline
+        if(ey1 == ey2)
+        {
+            render_hline(ey1, x1, fy1, x2, fy2);
+            return;
+        }
+
+        //Vertical line - we have to calculate start and end cells,
+        //and then - the common values of the area and coverage for
+        //all cells of the line. We know exactly there's only one 
+        //cell, so, we don't have to call render_hline().
+        incr  = 1;
+        if(dx == 0)
+        {
+            int ex = x1 >> poly_subpixel_shift;
+            int two_fx = (x1 - (ex << poly_subpixel_shift)) << 1;
+            int area;
+
+            first = poly_subpixel_scale;
+            if(dy < 0)
+            {
+                first = 0;
+                incr  = -1;
+            }
+
+            x_from = x1;
+
+            //render_hline(ey1, x_from, fy1, x_from, first);
+            delta = first - fy1;
+            m_curr_cell.cover += delta;
+            m_curr_cell.area  += two_fx * delta;
+
+            ey1 += incr;
+            set_curr_cell(ex, ey1);
+
+            delta = first + first - poly_subpixel_scale;
+            area = two_fx * delta;
+            while(ey1 != ey2)
+            {
+                //render_hline(ey1, x_from, poly_subpixel_scale - first, x_from, first);
+                m_curr_cell.cover = delta;
+                m_curr_cell.area  = area;
+                ey1 += incr;
+                set_curr_cell(ex, ey1);
+            }
+            //render_hline(ey1, x_from, poly_subpixel_scale - first, x_from, fy2);
+            delta = fy2 - poly_subpixel_scale + first;
+            m_curr_cell.cover += delta;
+            m_curr_cell.area  += two_fx * delta;
+            return;
+        }
+
+        //ok, we have to render several hlines
+        p     = (poly_subpixel_scale - fy1) * dx;
+        first = poly_subpixel_scale;
+
+        if(dy < 0)
+        {
+            p     = fy1 * dx;
+            first = 0;
+            incr  = -1;
+            dy    = -dy;
+        }
+
+        delta = (int)(p / dy);
+        mod   = (int)(p % dy);
+
+        if(mod < 0)
+        {
+            delta--;
+            mod += dy;
+        }
+
+        x_from = x1 + delta;
+        render_hline(ey1, x1, fy1, x_from, first);
+
+        ey1 += incr;
+        set_curr_cell(x_from >> poly_subpixel_shift, ey1);
+
+        if(ey1 != ey2)
+        {
+            p     = poly_subpixel_scale * dx;
+            lift  = (int)(p / dy);
+            rem   = (int)(p % dy);
+
+            if(rem < 0)
+            {
+                lift--;
+                rem += dy;
+            }
+            mod -= dy;
+
+            while(ey1 != ey2)
+            {
+                delta = lift;
+                mod  += rem;
+                if (mod >= 0)
+                {
+                    mod -= dy;
+                    delta++;
+                }
+
+                x_to = x_from + delta;
+                render_hline(ey1, x_from, poly_subpixel_scale - first, x_to, first);
+                x_from = x_to;
+
+                ey1 += incr;
+                set_curr_cell(x_from >> poly_subpixel_shift, ey1);
+            }
+        }
+        render_hline(ey1, x_from, poly_subpixel_scale - first, x2, fy2);
+    }
+
+    //------------------------------------------------------------------------
+    template<class Cell> 
+    void rasterizer_cells_aa<Cell>::allocate_block()
+    {
+        if(m_curr_block >= m_num_blocks)
+        {
+            if(m_num_blocks >= m_max_blocks)
+            {
+                cell_type** new_cells = 
+                    pod_allocator<cell_type*>::allocate(m_max_blocks + 
+                                                        cell_block_pool);
+
+                if(m_cells)
+                {
+                    std::memcpy(new_cells, m_cells, m_max_blocks * sizeof(cell_type*));
+                    pod_allocator<cell_type*>::deallocate(m_cells, m_max_blocks);
+                }
+                m_cells = new_cells;
+                m_max_blocks += cell_block_pool;
+            }
+
+            m_cells[m_num_blocks++] = 
+                pod_allocator<cell_type>::allocate(cell_block_size);
+
+        }
+        m_curr_cell_ptr = m_cells[m_curr_block++];
+    }
+
+
+
+    //------------------------------------------------------------------------
+    template <class T> static AGG_INLINE void swap_cells(T* a, T* b)
+    {
+        T temp = *a;
+        *a = *b;
+        *b = temp;
+    }
+
+
+    //------------------------------------------------------------------------
+    enum
+    {
+        qsort_threshold = 9
+    };
+
+
+    //------------------------------------------------------------------------
+    template<class Cell>
+    void qsort_cells(Cell** start, unsigned num)
+    {
+        Cell**  stack[80];
+        Cell*** top; 
+        Cell**  limit;
+        Cell**  base;
+
+        limit = start + num;
+        base  = start;
+        top   = stack;
+
+        for (;;)
+        {
+            int len = int(limit - base);
+
+            Cell** i;
+            Cell** j;
+            Cell** pivot;
+
+            if(len > qsort_threshold)
+            {
+                // we use base + len/2 as the pivot
+                pivot = base + len / 2;
+                swap_cells(base, pivot);
+
+                i = base + 1;
+                j = limit - 1;
+
+                // now ensure that *i <= *base <= *j 
+                if((*j)->x < (*i)->x)
+                {
+                    swap_cells(i, j);
+                }
+
+                if((*base)->x < (*i)->x)
+                {
+                    swap_cells(base, i);
+                }
+
+                if((*j)->x < (*base)->x)
+                {
+                    swap_cells(base, j);
+                }
+
+                for(;;)
+                {
+                    int x = (*base)->x;
+                    do i++; while( (*i)->x < x );
+                    do j--; while( x < (*j)->x );
+
+                    if(i > j)
+                    {
+                        break;
+                    }
+
+                    swap_cells(i, j);
+                }
+
+                swap_cells(base, j);
+
+                // now, push the largest sub-array
+                if(j - base > limit - i)
+                {
+                    top[0] = base;
+                    top[1] = j;
+                    base   = i;
+                }
+                else
+                {
+                    top[0] = i;
+                    top[1] = limit;
+                    limit  = j;
+                }
+                top += 2;
+            }
+            else
+            {
+                // the sub-array is small, perform insertion sort
+                j = base;
+                i = j + 1;
+
+                for(; i < limit; j = i, i++)
+                {
+                    for(; j[1]->x < (*j)->x; j--)
+                    {
+                        swap_cells(j + 1, j);
+                        if (j == base)
+                        {
+                            break;
+                        }
+                    }
+                }
+
+                if(top > stack)
+                {
+                    top  -= 2;
+                    base  = top[0];
+                    limit = top[1];
+                }
+                else
+                {
+                    break;
+                }
+            }
+        }
+    }
+
+
+    //------------------------------------------------------------------------
+    template<class Cell> 
+    void rasterizer_cells_aa<Cell>::sort_cells()
+    {
+        if(m_sorted) return; //Perform sort only the first time.
+
+        add_curr_cell();
+        m_curr_cell.x     = std::numeric_limits<int>::max();
+        m_curr_cell.y     = std::numeric_limits<int>::max();
+        m_curr_cell.cover = 0;
+        m_curr_cell.area  = 0;
+
+        if(m_num_cells == 0) return;
+
+// DBG: Check to see if min/max works well.
+//for(unsigned nc = 0; nc < m_num_cells; nc++)
+//{
+//    cell_type* cell = m_cells[nc >> cell_block_shift] + (nc & cell_block_mask);
+//    if(cell->x < m_min_x || 
+//       cell->y < m_min_y || 
+//       cell->x > m_max_x || 
+//       cell->y > m_max_y)
+//    {
+//        cell = cell; // Breakpoint here
+//    }
+//}
+        // Allocate the array of cell pointers
+        m_sorted_cells.allocate(m_num_cells, 16);
+
+        // Allocate and zero the Y array
+        m_sorted_y.allocate(m_max_y - m_min_y + 1, 16);
+        m_sorted_y.zero();
+
+        // Create the Y-histogram (count the numbers of cells for each Y)
+        cell_type** block_ptr = m_cells;
+        cell_type*  cell_ptr;
+        unsigned nb = m_num_cells;
+        unsigned i;
+        while(nb)
+        {
+            cell_ptr = *block_ptr++;
+            i = (nb > cell_block_size) ? unsigned(cell_block_size) : nb;
+            nb -= i;
+            while(i--) 
+            {
+                m_sorted_y[cell_ptr->y - m_min_y].start++;
+                ++cell_ptr;
+            }
+        }
+
+        // Convert the Y-histogram into the array of starting indexes
+        unsigned start = 0;
+        for(i = 0; i < m_sorted_y.size(); i++)
+        {
+            unsigned v = m_sorted_y[i].start;
+            m_sorted_y[i].start = start;
+            start += v;
+        }
+
+        // Fill the cell pointer array sorted by Y
+        block_ptr = m_cells;
+        nb = m_num_cells;
+        while(nb)
+        {
+            cell_ptr = *block_ptr++;
+            i = (nb > cell_block_size) ? unsigned(cell_block_size) : nb;
+            nb -= i;
+            while(i--)
+            {
+                sorted_y& curr_y = m_sorted_y[cell_ptr->y - m_min_y];
+                m_sorted_cells[curr_y.start + curr_y.num] = cell_ptr;
+                ++curr_y.num;
+                ++cell_ptr;
+            }
+        }
+        
+        // Finally arrange the X-arrays
+        for(i = 0; i < m_sorted_y.size(); i++)
+        {
+            const sorted_y& curr_y = m_sorted_y[i];
+            if(curr_y.num)
+            {
+                qsort_cells(m_sorted_cells.data() + curr_y.start, curr_y.num);
+            }
+        }
+        m_sorted = true;
+    }
+
+
+
+    //------------------------------------------------------scanline_hit_test
+    class scanline_hit_test
+    {
+    public:
+        scanline_hit_test(int x) : m_x(x), m_hit(false) {}
+
+        void reset_spans() {}
+        void finalize(int) {}
+        void add_cell(int x, int)
+        {
+            if(m_x == x) m_hit = true;
+        }
+        void add_span(int x, int len, int)
+        {
+            if(m_x >= x && m_x < x+len) m_hit = true;
+        }
+        unsigned num_spans() const { return 1; }
+        bool hit() const { return m_hit; }
+
+    private:
+        int  m_x;
+        bool m_hit;
+    };
+
+
+}
+
+#endif
--- a/dep/agg/include/agg_rasterizer_compound_aa.h
+++ b/dep/agg/include/agg_rasterizer_compound_aa.h
@@ -0,0 +1,665 @@
+//----------------------------------------------------------------------------
+// Anti-Grain Geometry - Version 2.3
+// Copyright (C) 2002-2005 Maxim Shemanarev (http://www.antigrain.com)
+//
+// Permission to copy, use, modify, sell and distribute this software 
+// is granted provided this copyright notice appears in all copies. 
+// This software is provided "as is" without express or implied
+// warranty, and with no claim as to its suitability for any purpose.
+//
+//----------------------------------------------------------------------------
+//
+// The author gratefully acknowleges the support of David Turner, 
+// Robert Wilhelm, and Werner Lemberg - the authors of the FreeType 
+// libray - in producing this work. See http://www.freetype.org for details.
+//
+//----------------------------------------------------------------------------
+// Contact: mcseem@antigrain.com
+//          mcseemagg@yahoo.com
+//          http://www.antigrain.com
+//----------------------------------------------------------------------------
+//
+// Adaptation for 32-bit screen coordinates has been sponsored by 
+// Liberty Technology Systems, Inc., visit http://lib-sys.com
+//
+// Liberty Technology Systems, Inc. is the provider of
+// PostScript and PDF technology for software developers.
+// 
+//----------------------------------------------------------------------------
+#ifndef AGG_RASTERIZER_COMPOUND_AA_INCLUDED
+#define AGG_RASTERIZER_COMPOUND_AA_INCLUDED
+
+#include <limits>
+#include "agg_rasterizer_cells_aa.h"
+#include "agg_rasterizer_sl_clip.h"
+
+namespace agg
+{
+
+    //-----------------------------------------------------------cell_style_aa
+    // A pixel cell. There're no constructors defined and it was done 
+    // intentionally in order to avoid extra overhead when allocating an 
+    // array of cells.
+    struct cell_style_aa
+    {
+        int   x;
+        int   y;
+        int   cover;
+        int   area;
+        int16 left, right;
+
+        void initial()
+        {
+            x     = std::numeric_limits<int>::max();
+            y     = std::numeric_limits<int>::max();
+            cover = 0;
+            area  = 0;
+            left  = -1;
+            right = -1;
+        }
+
+        void style(const cell_style_aa& c)
+        {
+            left  = c.left;
+            right = c.right;
+        }
+
+        int not_equal(int ex, int ey, const cell_style_aa& c) const
+        {
+            return ((unsigned)ex - (unsigned)x) | ((unsigned)ey - (unsigned)y) | 
+                   ((unsigned)left - (unsigned)c.left) | ((unsigned)right - (unsigned)c.right);
+        }
+    };
+
+
+    //===========================================================layer_order_e
+    enum layer_order_e
+    {
+        layer_unsorted, //------layer_unsorted
+        layer_direct,   //------layer_direct
+        layer_inverse   //------layer_inverse
+    };
+
+
+    //==================================================rasterizer_compound_aa
+    template<class Clip=rasterizer_sl_clip_int> class rasterizer_compound_aa
+    {
+        struct style_info 
+        { 
+            unsigned start_cell;
+            unsigned num_cells;
+            int      last_x;
+        };
+
+        struct cell_info
+        {
+            int x, area, cover; 
+        };
+
+    public:
+        typedef Clip                      clip_type;
+        typedef typename Clip::conv_type  conv_type;
+        typedef typename Clip::coord_type coord_type;
+
+        enum aa_scale_e
+        {
+            aa_shift  = 8,
+            aa_scale  = 1 << aa_shift,
+            aa_mask   = aa_scale - 1,
+            aa_scale2 = aa_scale * 2,
+            aa_mask2  = aa_scale2 - 1
+        };
+
+        //--------------------------------------------------------------------
+        rasterizer_compound_aa() : 
+            m_outline(),
+            m_clipper(),
+            m_filling_rule(fill_non_zero),
+            m_layer_order(layer_direct),
+            m_styles(),  // Active Styles
+            m_ast(),     // Active Style Table (unique values)
+            m_asm(),     // Active Style Mask 
+            m_cells(),
+            m_cover_buf(),
+            m_min_style(std::numeric_limits<int>::max()),
+            m_max_style(std::numeric_limits<int>::min()),
+            m_start_x(0),
+            m_start_y(0),
+            m_scan_y(std::numeric_limits<int>::max()),
+            m_sl_start(0),
+            m_sl_len(0)
+        {}
+
+        //--------------------------------------------------------------------
+        void reset(); 
+        void reset_clipping();
+        void clip_box(double x1, double y1, double x2, double y2);
+        void filling_rule(filling_rule_e filling_rule);
+        void layer_order(layer_order_e order);
+
+        //--------------------------------------------------------------------
+        void styles(int left, int right);
+        void move_to(int x, int y);
+        void line_to(int x, int y);
+        void move_to_d(double x, double y);
+        void line_to_d(double x, double y);
+        void add_vertex(double x, double y, unsigned cmd);
+
+        void edge(int x1, int y1, int x2, int y2);
+        void edge_d(double x1, double y1, double x2, double y2);
+
+        //-------------------------------------------------------------------
+        template<class VertexSource>
+        void add_path(VertexSource& vs, unsigned path_id=0)
+        {
+            double x;
+            double y;
+
+            unsigned cmd;
+            vs.rewind(path_id);
+            if(m_outline.sorted()) reset();
+            while(!is_stop(cmd = vs.vertex(&x, &y)))
+            {
+                add_vertex(x, y, cmd);
+            }
+        }
+
+        
+        //--------------------------------------------------------------------
+        int min_x()     const { return m_outline.min_x(); }
+        int min_y()     const { return m_outline.min_y(); }
+        int max_x()     const { return m_outline.max_x(); }
+        int max_y()     const { return m_outline.max_y(); }
+        int min_style() const { return m_min_style; }
+        int max_style() const { return m_max_style; }
+
+        //--------------------------------------------------------------------
+        void sort();
+        bool rewind_scanlines();
+        unsigned sweep_styles();
+        int      scanline_start()  const { return m_sl_start; }
+        unsigned scanline_length() const { return m_sl_len;   }
+        unsigned style(unsigned style_idx) const;
+
+        cover_type* allocate_cover_buffer(unsigned len);
+
+        //--------------------------------------------------------------------
+        bool navigate_scanline(int y); 
+        bool hit_test(int tx, int ty);
+
+        //--------------------------------------------------------------------
+        AGG_INLINE unsigned calculate_alpha(int area) const
+        {
+            int cover = area >> (poly_subpixel_shift*2 + 1 - aa_shift);
+            if(cover < 0) cover = -cover;
+            if(m_filling_rule == fill_even_odd)
+            {
+                cover &= aa_mask2;
+                if(cover > aa_scale)
+                {
+                    cover = aa_scale2 - cover;
+                }
+            }
+            if(cover > aa_mask) cover = aa_mask;
+            return cover;
+        }
+
+        //--------------------------------------------------------------------
+        // Sweeps one scanline with one style index. The style ID can be 
+        // determined by calling style(). 
+        template<class Scanline> bool sweep_scanline(Scanline& sl, int style_idx)
+        {
+            int scan_y = m_scan_y - 1;
+            if(scan_y > m_outline.max_y()) return false;
+
+            sl.reset_spans();
+
+            if(style_idx < 0) 
+            {
+                style_idx = 0;
+            }
+            else 
+            {
+                style_idx++;
+            }
+
+            const style_info& st = m_styles[m_ast[style_idx]];
+
+            unsigned num_cells = st.num_cells;
+            cell_info* cell = &m_cells[st.start_cell];
+
+            int cover = 0;
+            while(num_cells--)
+            {
+                unsigned alpha;
+                int x = cell->x;
+                int area = cell->area;
+
+                cover += cell->cover;
+
+                ++cell;
+
+                if(area)
+                {
+                    alpha = calculate_alpha((cover << (poly_subpixel_shift + 1)) - area);
+                    sl.add_cell(x, alpha);
+                    x++;
+                }
+
+                if(num_cells && cell->x > x)
+                {
+                    alpha = calculate_alpha(cover << (poly_subpixel_shift + 1));
+                    if(alpha)
+                    {
+                        sl.add_span(x, cell->x - x, alpha);
+                    }
+                }
+            }
+
+            if(sl.num_spans() == 0) return false;
+            sl.finalize(scan_y);
+            return true;
+        }
+
+    private:
+        void add_style(int style_id);
+
+        //--------------------------------------------------------------------
+        // Disable copying
+        rasterizer_compound_aa(const rasterizer_compound_aa<Clip>&);
+        const rasterizer_compound_aa<Clip>& 
+        operator = (const rasterizer_compound_aa<Clip>&);
+
+    private:
+        rasterizer_cells_aa<cell_style_aa> m_outline;
+        clip_type              m_clipper;
+        filling_rule_e         m_filling_rule;
+        layer_order_e          m_layer_order;
+        pod_vector<style_info> m_styles;  // Active Styles
+        pod_vector<unsigned>   m_ast;     // Active Style Table (unique values)
+        pod_vector<int8u>      m_asm;     // Active Style Mask 
+        pod_vector<cell_info>  m_cells;
+        pod_vector<cover_type> m_cover_buf;
+
+        int        m_min_style;
+        int        m_max_style;
+        coord_type m_start_x;
+        coord_type m_start_y;
+        int        m_scan_y;
+        int        m_sl_start;
+        unsigned   m_sl_len;
+    };
+
+
+
+
+
+
+
+
+
+
+    //------------------------------------------------------------------------
+    template<class Clip> 
+    void rasterizer_compound_aa<Clip>::reset() 
+    { 
+        m_outline.reset(); 
+        m_min_style = std::numeric_limits<int>::max();
+        m_max_style = std::numeric_limits<int>::min();
+        m_scan_y    = std::numeric_limits<int>::max();
+        m_sl_start  =  0;
+        m_sl_len    = 0;
+    }
+
+    //------------------------------------------------------------------------
+    template<class Clip> 
+    void rasterizer_compound_aa<Clip>::filling_rule(filling_rule_e filling_rule) 
+    { 
+        m_filling_rule = filling_rule; 
+    }
+
+    //------------------------------------------------------------------------
+    template<class Clip> 
+    void rasterizer_compound_aa<Clip>::layer_order(layer_order_e order)
+    {
+        m_layer_order = order;
+    }
+
+    //------------------------------------------------------------------------
+    template<class Clip> 
+    void rasterizer_compound_aa<Clip>::clip_box(double x1, double y1, 
+                                                double x2, double y2)
+    {
+        reset();
+        m_clipper.clip_box(conv_type::upscale(x1), conv_type::upscale(y1), 
+                           conv_type::upscale(x2), conv_type::upscale(y2));
+    }
+
+    //------------------------------------------------------------------------
+    template<class Clip> 
+    void rasterizer_compound_aa<Clip>::reset_clipping()
+    {
+        reset();
+        m_clipper.reset_clipping();
+    }
+
+    //------------------------------------------------------------------------
+    template<class Clip> 
+    void rasterizer_compound_aa<Clip>::styles(int left, int right)
+    {
+        cell_style_aa cell;
+        cell.initial();
+        cell.left = (int16)left;
+        cell.right = (int16)right;
+        m_outline.style(cell);
+        if(left  >= 0 && left  < m_min_style) m_min_style = left;
+        if(left  >= 0 && left  > m_max_style) m_max_style = left;
+        if(right >= 0 && right < m_min_style) m_min_style = right;
+        if(right >= 0 && right > m_max_style) m_max_style = right;
+    }
+
+    //------------------------------------------------------------------------
+    template<class Clip> 
+    void rasterizer_compound_aa<Clip>::move_to(int x, int y)
+    {
+        if(m_outline.sorted()) reset();
+        m_clipper.move_to(m_start_x = conv_type::downscale(x), 
+                          m_start_y = conv_type::downscale(y));
+    }
+
+    //------------------------------------------------------------------------
+    template<class Clip> 
+    void rasterizer_compound_aa<Clip>::line_to(int x, int y)
+    {
+        m_clipper.line_to(m_outline, 
+                          conv_type::downscale(x), 
+                          conv_type::downscale(y));
+    }
+
+    //------------------------------------------------------------------------
+    template<class Clip> 
+    void rasterizer_compound_aa<Clip>::move_to_d(double x, double y) 
+    { 
+        if(m_outline.sorted()) reset();
+        m_clipper.move_to(m_start_x = conv_type::upscale(x), 
+                          m_start_y = conv_type::upscale(y)); 
+    }
+
+    //------------------------------------------------------------------------
+    template<class Clip> 
+    void rasterizer_compound_aa<Clip>::line_to_d(double x, double y) 
+    { 
+        m_clipper.line_to(m_outline, 
+                          conv_type::upscale(x), 
+                          conv_type::upscale(y)); 
+    }
+
+    //------------------------------------------------------------------------
+    template<class Clip> 
+    void rasterizer_compound_aa<Clip>::add_vertex(double x, double y, unsigned cmd)
+    {
+        if(is_move_to(cmd)) 
+        {
+            move_to_d(x, y);
+        }
+        else 
+        if(is_vertex(cmd))
+        {
+            line_to_d(x, y);
+        }
+        else
+        if(is_close(cmd))
+        {
+            m_clipper.line_to(m_outline, m_start_x, m_start_y);
+        }
+    }
+
+    //------------------------------------------------------------------------
+    template<class Clip> 
+    void rasterizer_compound_aa<Clip>::edge(int x1, int y1, int x2, int y2)
+    {
+        if(m_outline.sorted()) reset();
+        m_clipper.move_to(conv_type::downscale(x1), conv_type::downscale(y1));
+        m_clipper.line_to(m_outline, 
+                          conv_type::downscale(x2), 
+                          conv_type::downscale(y2));
+    }
+    
+    //------------------------------------------------------------------------
+    template<class Clip> 
+    void rasterizer_compound_aa<Clip>::edge_d(double x1, double y1, 
+                                              double x2, double y2)
+    {
+        if(m_outline.sorted()) reset();
+        m_clipper.move_to(conv_type::upscale(x1), conv_type::upscale(y1)); 
+        m_clipper.line_to(m_outline, 
+                          conv_type::upscale(x2), 
+                          conv_type::upscale(y2)); 
+    }
+
+    //------------------------------------------------------------------------
+    template<class Clip> 
+    AGG_INLINE void rasterizer_compound_aa<Clip>::sort()
+    {
+        m_outline.sort_cells();
+    }
+
+    //------------------------------------------------------------------------
+    template<class Clip> 
+    AGG_INLINE bool rasterizer_compound_aa<Clip>::rewind_scanlines()
+    {
+        m_outline.sort_cells();
+        if(m_outline.total_cells() == 0) 
+        {
+            return false;
+        }
+        if(m_max_style < m_min_style)
+        {
+            return false;
+        }
+        m_scan_y = m_outline.min_y();
+        m_styles.allocate(m_max_style - m_min_style + 2, 128);
+        return true;
+    }
+
+    //------------------------------------------------------------------------
+    template<class Clip> 
+    AGG_INLINE void rasterizer_compound_aa<Clip>::add_style(int style_id)
+    {
+        if(style_id < 0) style_id  = 0;
+        else             style_id -= m_min_style - 1;
+
+        unsigned nbyte = style_id >> 3;
+        unsigned mask = 1 << (style_id & 7);
+
+        style_info* style = &m_styles[style_id];
+        if((m_asm[nbyte] & mask) == 0)
+        {
+            m_ast.add(style_id);
+            m_asm[nbyte] |= mask;
+            style->start_cell = 0;
+            style->num_cells = 0;
+            style->last_x = std::numeric_limits<int>::min();
+        }
+        ++style->start_cell;
+    }
+
+    //------------------------------------------------------------------------
+    // Returns the number of styles
+    template<class Clip> 
+    unsigned rasterizer_compound_aa<Clip>::sweep_styles()
+    {
+        for(;;)
+        {
+            if(m_scan_y > m_outline.max_y()) return 0;
+            unsigned num_cells = m_outline.scanline_num_cells(m_scan_y);
+            const cell_style_aa* const* cells = m_outline.scanline_cells(m_scan_y);
+            unsigned num_styles = m_max_style - m_min_style + 2;
+            const cell_style_aa* curr_cell;
+            unsigned style_id;
+            style_info* style;
+            cell_info* cell;
+
+            m_cells.allocate(num_cells * 2, 256); // Each cell can have two styles
+            m_ast.capacity(num_styles, 64);
+            m_asm.allocate((num_styles + 7) >> 3, 8);
+            m_asm.zero();
+
+            if(num_cells)
+            {
+                // Pre-add zero (for no-fill style, that is, -1).
+                // We need that to ensure that the "-1 style" would go first.
+                m_asm[0] |= 1; 
+                m_ast.add(0);
+                style = &m_styles[0];
+                style->start_cell = 0;
+                style->num_cells = 0;
+                style->last_x = std::numeric_limits<int>::min();
+
+                m_sl_start = cells[0]->x;
+                m_sl_len   = cells[num_cells-1]->x - m_sl_start + 1;
+                while(num_cells--)
+                {
+                    curr_cell = *cells++;
+                    add_style(curr_cell->left);
+                    add_style(curr_cell->right);
+                }
+
+                // Convert the Y-histogram into the array of starting indexes
+                unsigned i;
+                unsigned start_cell = 0;
+                for(i = 0; i < m_ast.size(); i++)
+                {
+                    style_info& st = m_styles[m_ast[i]];
+                    unsigned v = st.start_cell;
+                    st.start_cell = start_cell;
+                    start_cell += v;
+                }
+
+                cells = m_outline.scanline_cells(m_scan_y);
+                num_cells = m_outline.scanline_num_cells(m_scan_y);
+
+                while(num_cells--)
+                {
+                    curr_cell = *cells++;
+                    style_id = (curr_cell->left < 0) ? 0 : 
+                                curr_cell->left - m_min_style + 1;
+
+                    style = &m_styles[style_id];
+                    if(curr_cell->x == style->last_x)
+                    {
+                        cell = &m_cells[style->start_cell + style->num_cells - 1];
+                        cell->area  += curr_cell->area;
+                        cell->cover += curr_cell->cover;
+                    }
+                    else
+                    {
+                        cell = &m_cells[style->start_cell + style->num_cells];
+                        cell->x       = curr_cell->x;
+                        cell->area    = curr_cell->area;
+                        cell->cover   = curr_cell->cover;
+                        style->last_x = curr_cell->x;
+                        style->num_cells++;
+                    }
+
+                    style_id = (curr_cell->right < 0) ? 0 : 
+                                curr_cell->right - m_min_style + 1;
+
+                    style = &m_styles[style_id];
+                    if(curr_cell->x == style->last_x)
+                    {
+                        cell = &m_cells[style->start_cell + style->num_cells - 1];
+                        cell->area  -= curr_cell->area;
+                        cell->cover -= curr_cell->cover;
+                    }
+                    else
+                    {
+                        cell = &m_cells[style->start_cell + style->num_cells];
+                        cell->x       =  curr_cell->x;
+                        cell->area    = -curr_cell->area;
+                        cell->cover   = -curr_cell->cover;
+                        style->last_x =  curr_cell->x;
+                        style->num_cells++;
+                    }
+                }
+            }
+            if(m_ast.size() > 1) break;
+            ++m_scan_y;
+        }
+        ++m_scan_y;
+
+        if(m_layer_order != layer_unsorted)
+        {
+            range_adaptor<pod_vector<unsigned> > ra(m_ast, 1, m_ast.size() - 1);
+            if(m_layer_order == layer_direct) quick_sort(ra, unsigned_greater);
+            else                              quick_sort(ra, unsigned_less);
+        }
+
+        return m_ast.size() - 1;
+    }
+
+    //------------------------------------------------------------------------
+    // Returns style ID depending of the existing style index
+    template<class Clip> 
+    AGG_INLINE 
+    unsigned rasterizer_compound_aa<Clip>::style(unsigned style_idx) const
+    {
+        return m_ast[style_idx + 1] + m_min_style - 1;
+    }
+
+    //------------------------------------------------------------------------ 
+    template<class Clip> 
+    AGG_INLINE bool rasterizer_compound_aa<Clip>::navigate_scanline(int y)
+    {
+        m_outline.sort_cells();
+        if(m_outline.total_cells() == 0) 
+        {
+            return false;
+        }
+        if(m_max_style < m_min_style)
+        {
+            return false;
+        }
+        if(y < m_outline.min_y() || y > m_outline.max_y()) 
+        {
+            return false;
+        }
+        m_scan_y = y;
+        m_styles.allocate(m_max_style - m_min_style + 2, 128);
+        return true;
+    }
+    
+    //------------------------------------------------------------------------ 
+    template<class Clip> 
+    bool rasterizer_compound_aa<Clip>::hit_test(int tx, int ty)
+    {
+        if(!navigate_scanline(ty)) 
+        {
+            return false;
+        }
+
+        unsigned num_styles = sweep_styles(); 
+        if(num_styles <= 0)
+        {
+            return false;
+        }
+
+        scanline_hit_test sl(tx);
+        sweep_scanline(sl, -1);
+        return sl.hit();
+    }
+
+    //------------------------------------------------------------------------ 
+    template<class Clip> 
+    cover_type* rasterizer_compound_aa<Clip>::allocate_cover_buffer(unsigned len)
+    {
+        m_cover_buf.allocate(len, 256);
+        return &m_cover_buf[0];
+    }
+
+}
+
+
+
+#endif
+
--- a/Show More
+++ b/Show More