Clean up the sequencer firmware somewhat, trying to look for this Amiga write

issue.

.appveyor.yml

@@ -1,41 +0,0 @@
-version: '{branch}.{build}'
-clone_depth: 1
-skip_tags: true
-
-environment:
-  MSYSTEM: MINGW32
-
-init:
-  - git config --global core.autocrlf input
-
-install:
-  - set PATH=c:\msys64\mingw32\bin;c:\msys64\usr\bin;c:\msys64\bin;%PATH%
-  - echo %PATH%
-  - pacman -S --noconfirm --needed make ninja mingw-w64-i686-libusb mingw-w64-i686-sqlite3 mingw-w64-i686-zlib mingw-w64-i686-gcc zip
-
-build_script:
-  - make
-  - zip -9 fluxengine.zip fluxengine.exe brother120tool.exe brother240tool.exe FluxEngine.cydsn/CortexM3/ARM_GCC_541/Release/FluxEngine.hex
-
-artifacts:
-  - path: fluxengine.zip
-    name: fluxengine.zip
-
-deploy:
-  release: FluxEngine Windows client version $(APPVEYOR_BUILD_NUMBER)
-  description: >
-    This is an automatically built version of the FluxEngine Windows client
-    which is generated whenever a significant checkin has happened. It's had
-    no testing whatsoever.
-
-    To use, download it, put it somewhere, and then run it from a cmd window
-    or other command line shell.
-  provider: GitHub
-  auth_token:
-    secure: dfJjj7fWCoDUz+Ni11OcNPB/U3TNJFwNA2AsL++ChFjniUsZLlC6SDWHiL/t4FZo
-  artifact: fluxengine.zip
-  draft: false
-  prerelease: false
-  on:
-    branch: master
-

.github/workflows/ccpp.yml

@@ -10,32 +10,45 @@ jobs:
       with:
         fetch-depth: 1
     - name: apt
-      run: sudo apt install libusb-1.0-0-dev libsqlite3-dev ninja-build
+      run: sudo apt update && sudo apt install libusb-1.0-0-dev libsqlite3-dev ninja-build protobuf-compiler
     - name: make
       run: make
 
   build-macos:
     runs-on: macos-latest
     steps:
-    - uses: actions/checkout@v1
+    - uses: actions/checkout@v2
       with:
         fetch-depth: 1
     - name: brew
-      run: brew install sqlite pkg-config libusb ninja
+      run: brew install sqlite pkg-config libusb ninja protobuf
     - 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
+  build-windows:
+    runs-on: windows-latest
+    defaults:
+      run:
+        shell: msys2 {0}
+    steps:
+    - uses: msys2/setup-msys2@v2
+      with:
+        update: true
+        msystem: MINGW32
+        install: >-
+          make
+          ninja
+          mingw-w64-i686-libusb
+          mingw-w64-i686-sqlite3
+          mingw-w64-i686-zlib
+          mingw-w64-i686-gcc
+          zip
+          mingw-w64-i686-protobuf
+          vim
+    - uses: actions/checkout@v1
+      with:
+        fetch-depth: 1
+    - name: build
+      run: |
+        make
 

.github/workflows/release.yml

@@ -0,0 +1,63 @@
+name: Autorelease
+
+on:
+  push:
+    branches:
+      - "master"
+
+jobs:
+  dev-release:
+    runs-on: windows-latest
+    defaults:
+      run:
+        shell: msys2 {0}
+    steps:
+    - uses: msys2/setup-msys2@v2
+      with:
+        update: true
+        msystem: MINGW32
+        install: >-
+          make
+          ninja
+          mingw-w64-i686-libusb
+          mingw-w64-i686-sqlite3
+          mingw-w64-i686-zlib
+          mingw-w64-i686-gcc
+          zip
+          mingw-w64-i686-protobuf
+          vim
+    - uses: actions/checkout@v2
+      with:
+        fetch-depth: 1
+    - name: build
+      run: |
+        make
+    - name: zip
+      run: |
+        zip -9 fluxengine.zip fluxengine.exe brother120tool.exe brother240tool.exe FluxEngine.cydsn/CortexM3/ARM_GCC_541/Release/FluxEngine.hex
+    - name: date
+      run: |
+        echo "RELEASE_DATE=$(date --rfc-3339=date)" >> ${GITHUB_ENV}
+    - name: tag
+      uses: EndBug/latest-tag@latest
+      with:
+        tag-name: dev
+      env:
+        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+    - name: delete-old-assets
+      uses: mknejp/delete-release-assets@v1
+      with:
+        token: ${{ github.token }}
+        tag: dev
+        assets: | 
+          fluxengine.zip
+        fail-if-no-assets: false
+    - name: release
+      uses: softprops/action-gh-release@v1
+      with:
+        name: Development build ${{ env.RELEASE_DATE }}
+        files: |
+          fluxengine.zip
+        tag_name: dev
+      env:
+        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

FluxEngine.cydsn/CortexM3/ARM_GCC_541/Release/FluxEngine.hex

@@ -1,246 +1,246 @@
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-:400040000448AFF300800123237010BD6081FF1F0000000028360000084B10B51BB108490848AFF300800848036803B910BD074B002BFBD0BDE81040184700BF00000000EB
-:400080006481FF1F28360000C880FF1F000000000A4A0B4B116801310B40002BBEBF03F1FF3363F00F030133136011685368994202BF024B01221A72704700BF8081FF1F9E
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 :00000001FF

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),

FluxEngine.cydsn/FluxEngine.cydwr

@@ -272,7 +272,7 @@
         <Data key="derive_type" value="AUTO" />
         <Data key="desired_freq" value="1600000" />
         <Data key="desired_unit" value="0" />
-        <Data key="divider" value="40" />
+        <Data key="divider" value="30" />
         <Data key="domain" value="DIGITAL" />
         <Data key="enabled" value="True" />
         <Data key="minus_accuracy" value="0.25" />
@@ -390,7 +390,7 @@
         <Data key="derive_type" value="AUTO" />
         <Data key="desired_freq" value="1600000" />
         <Data key="desired_unit" value="0" />
-        <Data key="divider" value="40" />
+        <Data key="divider" value="30" />
         <Data key="domain" value="DIGITAL" />
         <Data key="enabled" value="True" />
         <Data key="minus_accuracy" value="0.25" />
@@ -604,7 +604,7 @@
         <Data key="check_tolerance" value="True" />
         <Data key="clock_version" value="v1" />
         <Data key="derive_type" value="BUILTIN" />
-        <Data key="desired_freq" value="64" />
+        <Data key="desired_freq" value="48" />
         <Data key="desired_unit" value="6" />
         <Data key="divider" value="0" />
         <Data key="domain" value="0" />
@@ -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_v6_10" />
       <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" />
@@ -4190,7 +4214,7 @@
   </Group>
   <Group key="System3">
     <Data key="CYDEV_CONFIG_FASTBOOT_ENABLED" value="True" />
-    <Data key="CYDEV_CONFIG_UNUSED_IO" value="AllowButWarn" />
+    <Data key="CYDEV_CONFIG_UNUSED_IO" value="Disallowed" />
     <Data key="CYDEV_CONFIGURATION_ECC" value="True" />
     <Data key="CYDEV_CONFIGURATION_MODE" value="COMPRESSED" />
     <Data key="CYDEV_DEBUGGING_DPS" value="Disable" />

FluxEngine.cydsn/FluxEngine.cyprj

@@ -39,20 +39,6 @@
 <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="crunch.c" persistent="..\lib\common\crunch.c">
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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.h" persistent="..\lib\common\crunch.h">
-<Hidden v="False" />
-</CyGuid_31768f72-0253-412b-af77-e7dba74d1330>
-<build_action v="HEADER;;;;" />
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-</CyGuid_8b8ab257-35d3-4473-b57b-36315200b38b>
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 </CyGuid_0820c2e7-528d-4137-9a08-97257b946089>
 </CyGuid_2f73275c-45bf-46ba-b3b1-00a2fe0c8dd8>
@@ -1533,20 +1519,20 @@
 <CyGuid_ebc4f06d-207f-49c2-a540-72acf4adabc0 type_name="CyDesigner.Common.ProjMgmt.Model.CyPrjMgmtFolderSerialize" version="3">
 <CyGuid_2f73275c-45bf-46ba-b3b1-00a2fe0c8dd8 type_name="CyDesigner.Common.ProjMgmt.Model.CyPrjMgmtBaseContainerSerialize" version="1">
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-<Hidden v="True" />
+<Hidden v="False" />
 </CyGuid_31768f72-0253-412b-af77-e7dba74d1330>
 <CyGuid_0820c2e7-528d-4137-9a08-97257b946089 type_name="CyDesigner.Common.ProjMgmt.Model.CyPrjMgmtItemListSerialize" version="2">
 <dependencies>
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 <CyGuid_31768f72-0253-412b-af77-e7dba74d1330 type_name="CyDesigner.Common.ProjMgmt.Model.CyPrjMgmtItemSerialize" version="2" name="USBFS_ep4_dma.c" persistent="Generated_Source\PSoC5\USBFS_ep4_dma.c">
-<Hidden v="True" />
+<Hidden v="False" />
 </CyGuid_31768f72-0253-412b-af77-e7dba74d1330>
 <build_action v="SOURCE_C;CortexM3;;;" />
 <PropertyDeltas />
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 <CyGuid_31768f72-0253-412b-af77-e7dba74d1330 type_name="CyDesigner.Common.ProjMgmt.Model.CyPrjMgmtItemSerialize" version="2" name="USBFS_ep4_dma.h" persistent="Generated_Source\PSoC5\USBFS_ep4_dma.h">
-<Hidden v="True" />
+<Hidden v="False" />
 </CyGuid_31768f72-0253-412b-af77-e7dba74d1330>
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@@ -1559,20 +1545,20 @@
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-<Hidden v="True" />
+<Hidden v="False" />
 </CyGuid_31768f72-0253-412b-af77-e7dba74d1330>
 <CyGuid_0820c2e7-528d-4137-9a08-97257b946089 type_name="CyDesigner.Common.ProjMgmt.Model.CyPrjMgmtItemListSerialize" version="2">
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 <CyGuid_31768f72-0253-412b-af77-e7dba74d1330 type_name="CyDesigner.Common.ProjMgmt.Model.CyPrjMgmtItemSerialize" version="2" name="USBFS_ep3_dma.c" persistent="Generated_Source\PSoC5\USBFS_ep3_dma.c">
-<Hidden v="True" />
+<Hidden v="False" />
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-<Hidden v="True" />
+<Hidden v="False" />
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@@ -1585,20 +1571,20 @@
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-<Hidden v="True" />
+<Hidden v="False" />
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 <CyGuid_0820c2e7-528d-4137-9a08-97257b946089 type_name="CyDesigner.Common.ProjMgmt.Model.CyPrjMgmtItemListSerialize" version="2">
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-<Hidden v="True" />
+<Hidden v="False" />
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-<Hidden v="True" />
+<Hidden v="False" />
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@@ -1611,20 +1597,20 @@
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-<Hidden v="True" />
+<Hidden v="False" />
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 <CyGuid_0820c2e7-528d-4137-9a08-97257b946089 type_name="CyDesigner.Common.ProjMgmt.Model.CyPrjMgmtItemListSerialize" version="2">
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-<Hidden v="True" />
+<Hidden v="False" />
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+<Hidden v="False" />
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+<CyGuid_31768f72-0253-412b-af77-e7dba74d1330 type_name="CyDesigner.Common.ProjMgmt.Model.CyPrjMgmtItemSerialize" version="2" name="USBFS_ep5_dma.h" persistent="Generated_Source\PSoC5\USBFS_ep5_dma.h">
+<Hidden v="True" />
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+<build_action v="HEADER;;;;" />
+<PropertyDeltas />
+</CyGuid_8b8ab257-35d3-4473-b57b-36315200b38b>
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 </CyGuid_2f73275c-45bf-46ba-b3b1-00a2fe0c8dd8>
@@ -3329,8 +3584,8 @@
 </platforms>
 <project_current_platform v="c9323d49-d323-40b8-9b59-cc008d68a989" />
 <last_selected_tab v="Cypress" />
-<WriteAppVersionLastSavedWith v="4.2.0.641" />
-<WriteAppMarketingVersionLastSavedWith v=" 4.2" />
+<WriteAppVersionLastSavedWith v="4.4.0.80" />
+<WriteAppMarketingVersionLastSavedWith v=" 4.4" />
 <project_id v="ff3eb327-f593-4eb3-a00f-72497469e963" />
 <GenerateDescriptionFiles v="False" />
 </CyGuid_49cfd574-032a-4a64-b7be-d4eeeaf25e43>
@@ -3342,11 +3597,9 @@
 <library_dep persistent="${CyRoot}\psoc\content\default\CyAnnotationLibrary\CyAnnotationLibrary.cylib\CyAnnotationLibrary.cyprj" />
 </library_deps>
 <CyGuid_b0d670ad-d48f-47cb-9d0b-b1642bab195c type_name="CyDesigner.Common.Base.CyExprTypeMgr" version="1" />
-<ignored_deps>
-<library_dep persistent="C:\Users\dg\Documents\PSoC Creator\4.1\Downloads ( 4.1).cylib\Downloads ( 4.1).cyprj" />
-</ignored_deps>
+<ignored_deps />
 </CyGuid_495451fe-d201-4d01-b22d-5d3f5609ac37>
 <boot_component v="" />
-<current_generation v="114" />
+<current_generation v="150" />
 </CyGuid_fec8f9e8-2365-4bdb-96d3-a4380222e01b>
 </CyXmlSerializer>

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: /* counter changes here */
-                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

FluxEngine.cydsn/Sequencer/Sequencer.v

@@ -18,21 +18,17 @@ module Sequencer (
 
 //`#start body` -- edit after this line, do not edit this line
 
-localparam STATE_IDLE = 0;
-localparam STATE_LOAD = 1;
+localparam STATE_LOAD = 0;
+localparam STATE_WRITING = 1;
 localparam STATE_WAITING = 2;
-localparam STATE_PULSING = 3;
-localparam STATE_INDEXING = 4;
 
-localparam OPCODE_PULSE = 8'h80;
-localparam OPCODE_INDEX = 8'h81;
+reg [1:0] 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_WAITING) && (countdown == 0) && pulsepending);
+assign debug_state = 0;
 
 reg olddataclock;
 wire dataclocked;
@@ -40,61 +36,53 @@ always @(posedge clock) olddataclock <= dataclock;
 assign dataclocked = !olddataclock && dataclock;
 
 reg oldsampleclock;
-wire sampleclocked;
-always @(posedge clock) oldsampleclock <= sampleclock;
-assign sampleclocked = !oldsampleclock && sampleclock;
-
-reg oldindex;
-wire indexed;
-always @(posedge clock) oldindex <= index;
-assign indexed = !oldindex && index;
+reg sampleclocked;
 
 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] - 1; /* compensate for extra tick in state machine */
+                    
+                    state <= STATE_WRITING;
+                end
+            end
             
-            STATE_WAITING:
+            STATE_WRITING:
+            begin
                 if (sampleclocked)
                 begin
                     if (countdown == 0)
-                        state <= STATE_LOAD;
+                        state <= STATE_WAITING;
                     else
                         countdown <= countdown - 1;
+                    sampleclocked <= 0;
                 end
+            end
             
-            STATE_PULSING:
+            STATE_WAITING:
                 state <= STATE_LOAD;
-            
-            STATE_INDEXING:
-                if (indexed)
-                    state <= STATE_LOAD;
-                else
-                    state <= STATE_INDEXING;
         endcase
+    end
 end
 
 //`#end` -- edit above this line, do not edit this line

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 */
@@ -14,11 +13,18 @@
 #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 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;
@@ -26,7 +32,7 @@ static bool homed = false;
 static int current_track = 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()));
@@ -41,6 +47,8 @@ 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;
@@ -65,12 +73,41 @@ static void system_timer_cb(void)
 
 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;
+    uint32_t index_pulse_duration = clock - hardsec_last_pulse_time;
+
+    if (!hardsec_index_threshold)
+    {
+        index_irq = true;
+        hardsec_index_irq_primed = false;
+    }
+    else
+    {
+        /* It's only an index pulse if the previous pulse is less than
+         * the threshold.
+         */
+        index_irq = (index_pulse_duration <= hardsec_index_threshold) ?
+            hardsec_index_irq_primed : false;
+
+        if (index_irq)
+            hardsec_index_irq_primed = false;
+        else
+            hardsec_index_irq_primed =
+                index_pulse_duration <= 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)
@@ -103,7 +140,10 @@ static void print(const char* msg, ...)
 static void set_drive_flags(struct set_drive_frame* flags)
 {
     if (current_drive_flags.drive != flags->drive)
+    {
+        stop_motor();
         homed = false;
+    }
     
     current_drive_flags = *flags;
     DRIVESELECT_REG_Write(flags->drive ? 2 : 1); /* select drive 1 or 0 */
@@ -142,6 +182,12 @@ 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);
@@ -159,9 +205,15 @@ 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;
 }
@@ -183,19 +235,19 @@ 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)
@@ -230,6 +282,7 @@ 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");
 }
 
@@ -248,7 +301,7 @@ 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();
     
@@ -258,7 +311,7 @@ static void cmd_measure_speed(struct any_frame* f)
     while (!index_irq)
     {
         elapsed = clock - start_clock;
-        if (elapsed > 1000)
+        if (elapsed > 1500)
         {
             elapsed = 0;
             break;
@@ -267,10 +320,14 @@ static void cmd_measure_speed(struct any_frame* f)
 
     if (elapsed != 0)
     {
-        index_irq = false;
+        int target_pulse_count = f->hard_sector_count + 1;
         start_clock = clock;
-        while (!index_irq)
-            elapsed = clock - start_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);
@@ -278,12 +335,14 @@ static void cmd_measure_speed(struct any_frame* f)
     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++)
@@ -292,11 +351,44 @@ 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++)
@@ -306,7 +398,7 @@ 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));
@@ -327,14 +419,14 @@ 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);
@@ -347,16 +439,14 @@ static void cmd_read(struct read_frame* f)
         
     if (f->synced)
     {
+        hardsec_index_threshold = f->hardsec_threshold_ms;
         index_irq = false;
         while (!index_irq)
             ;
         index_irq = false;
+        hardsec_index_threshold = 0;
     }
     
-    crunch_state_t cs = {};
-    cs.outputptr = usb_buffer;
-    cs.outputlen = BUFFER_SIZE;
-    
     dma_writing_to_td = 0;
     dma_reading_from_td = -1;
     dma_underrun = false;
@@ -371,75 +461,64 @@ static void cmd_read(struct read_frame* f)
     while (dma_writing_to_td == 0)
         ;
     dma_reading_from_td = 0;
+    bool dma_running = true;
     
     /* Start transferring. */
 
     uint32_t start_time = clock;
-    while (!dma_underrun)
+    for (;;)
     {
         CyWdtClear();
 
-        /* Wait for the next block to be read. */
-        while (dma_reading_from_td == dma_writing_to_td)
+        /* If the sample session is over, stop reading but continue processing until
+         * the DMA chain is empty. */
+        
+        if ((clock - start_time) >= f->milliseconds)
         {
-            /* On an underrun, give up immediately. */
-            if (dma_underrun)
-                goto abort;
-            
-            /* Also finish if the sample session is over. */
-            if ((clock - start_time) >= f->milliseconds)
-                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 there is no available space in the output buffer, flush the buffer via
-             * USB and go again. */
-            if (cs.outputlen == 0)
+            if (dma_running)
             {
-                wait_until_writeable(FLUXENGINE_DATA_IN_EP_NUM);
-                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:;
     bool saved_dma_underrun = dma_underrun;
-    CyDmaChSetRequest(dma_channel, CY_DMA_CPU_TERM_CHAIN);
-    while (CyDmaChGetRequest(dma_channel))
-        ;
 
-    donecrunch(&cs);
+    /* Terminate the transfer (all transfers are an exact number of fragments). */
     wait_until_writeable(FLUXENGINE_DATA_IN_EP_NUM);
-    /* If there's a complete packet waiting, send it. */
-    if (cs.outputlen != BUFFER_SIZE)
-    {
-        USBFS_LoadInEP(FLUXENGINE_DATA_IN_EP_NUM, usb_buffer, BUFFER_SIZE);
-        wait_until_writeable(FLUXENGINE_DATA_IN_EP_NUM);
-    }
-    if ((cs.outputlen != 0) && (cs.outputlen != BUFFER_SIZE))
-    {
-        /* If there's a partial packet waiting, send it; this will also terminate the transfer. */
-        USBFS_LoadInEP(FLUXENGINE_DATA_IN_EP_NUM, usb_buffer, BUFFER_SIZE-cs.outputlen);
-    }
-    else
-    {
-        /* Otherwise just terminate the transfer. */
-        USBFS_LoadInEP(FLUXENGINE_DATA_IN_EP_NUM, NULL, 0);
-    }
+    USBFS_LoadInEP(FLUXENGINE_DATA_IN_EP_NUM, NULL, 0);
     wait_until_writeable(FLUXENGINE_DATA_IN_EP_NUM);
     deinit_dma();
 
+    STEP_REG_Write(0);
     if (saved_dma_underrun)
     {
         print("underrun after %d packets");
@@ -485,36 +564,32 @@ 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();
+        //CyWdtClear();
 
         /* Read data from USB into the buffers. */
         
@@ -523,54 +598,25 @@ 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;
@@ -585,7 +631,7 @@ 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)
                     ;
@@ -596,7 +642,7 @@ static void cmd_write(struct write_frame* f)
                 SEQUENCER_CONTROL_Write(0); /* start writing! */
             }
         }
-        
+
         if (writing && (dma_underrun || index_irq))
             goto abort;
 
@@ -620,31 +666,29 @@ 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);
 }
@@ -652,10 +696,11 @@ abort:
 static void cmd_erase(struct erase_frame* f)
 {
     SIDE_REG_Write(f->side);
-    seek_to(current_track);    
+    seek_to(current_track);
     /* Disk is now spinning. */
     
     print("start erasing");
+    hardsec_index_threshold = f->hardsec_threshold_ms;
     index_irq = false;
     while (!index_irq)
         ;
@@ -664,6 +709,7 @@ 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);
@@ -672,6 +718,10 @@ static void cmd_erase(struct erase_frame* f)
 
 static void cmd_set_drive(struct set_drive_frame* f)
 {
+    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);
@@ -785,11 +835,15 @@ 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:
@@ -821,6 +875,21 @@ 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;
@@ -834,11 +903,11 @@ 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();
@@ -854,7 +923,7 @@ int main(void)
         {
             print("Waiting for USB...");
             while (!USBFS_GetConfiguration())
-                ;
+                CyWdtClear();
             print("USB ready");
             USBFS_EnableOutEP(FLUXENGINE_CMD_OUT_EP_NUM);
         }

Makefile

@@ -1,21 +1,23 @@
-PACKAGES = zlib sqlite3 libusb-1.0
+PACKAGES = zlib sqlite3 libusb-1.0 protobuf
 
-export CFLAGS = --std=c++14 -ffunction-sections -fdata-sections
-export LDFLAGS =
+export CFLAGS = -x c++ --std=c++14 -ffunction-sections -fdata-sections
+export LDFLAGS = -pthread
 
 export COPTFLAGS = -Os
-export LDOPTFLAGS = -Os -s
+export LDOPTFLAGS = -Os
 
 export CDBGFLAGS = -O0 -g
 export LDDBGFLAGS = -O0 -g
 
 ifeq ($(OS), Windows_NT)
+export PROTOC = /mingw32/bin/protoc
 export CXX = /mingw32/bin/g++
-export AR = /mingw32/bin/ar rcs
+export AR = /mingw32/bin/ar rc
+export RANLIB = /mingw32/bin/ranlib
 export STRIP = /mingw32/bin/strip
-export CFLAGS += -I/mingw32/include/libusb-1.0
+export CFLAGS += -I/mingw32/include/libusb-1.0 -I/mingw32/include
 export LDFLAGS +=
-export LIBS = -static -lz -lsqlite3 -lusb-1.0
+export LIBS += -L/mingw32/lib -static -lz -lsqlite3 -lusb-1.0 -lprotobuf
 export EXTENSION = .exe
 else
 
@@ -25,21 +27,31 @@ $(warning These pkg-config packages are installed: $(shell pkg-config --list-all
 $(error You must have these pkg-config packages installed: $(PACKAGES))
 endif
 
+export PROTOC = protoc
 export CXX = g++
-export AR = ar rcs
+export AR = ar rc
+export RANLIB = ranlib
 export STRIP = strip
 export CFLAGS += $(shell pkg-config --cflags $(PACKAGES))
 export LDFLAGS +=
-export LIBS = $(shell pkg-config --libs $(PACKAGES))
+export LIBS += $(shell pkg-config --libs $(PACKAGES))
 export EXTENSION =
+
+ifeq ($(shell uname),Darwin)
+AR = ar rcS
+RANLIB += -c -no_warning_for_no_symbols
 endif
 
+endif
+export XXD = xxd
+
 CFLAGS += -Ilib -Idep/fmt -Iarch
 
 export OBJDIR = .obj
 
 all: .obj/build.ninja
-	@ninja -f .obj/build.ninja -v
+	@ninja -f .obj/build.ninja
+	@if command -v cscope > /dev/null; then cscope -bRq; fi
 
 clean:
 	@echo CLEAN

README.md

@@ -4,6 +4,11 @@ FluxEngine
 (If you're reading this on GitHub, the formatting's a bit messed up. [Try the
 version on cowlark.com instead.](http://cowlark.com/fluxengine/)
 
+**Breaking news!** As of 2021-05-21, the command line environment has changed
+_substantially_ (to make it more consistent and flexible, and allow some new
+backend features like multi-format IBM scheme disks, which are popular with
+CP/M). If things don't work the way you expect, please check the documentation.
+
 What?
 -----
 
@@ -24,17 +29,18 @@ 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 +65,15 @@ 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?
 ------
@@ -77,22 +90,26 @@ people who've had it work).
 
 ### Old disk formats
 
-| Format                                   | Read? | Write? | Notes |
-|:-----------------------------------------|:-----:|:------:|-------|
-| [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 |
+| Format                                    | Read? | Write? | Notes |
+|:------------------------------------------|:-----:|:------:|-------|
+| [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 1541/1581](doc/disk-c64.md) |  🦄   |   🦄   | and probably the other 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 |
 {: .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 +123,12 @@ 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 |
+| [VDS Eco1](doc/disk-eco1.md)             |  🦖   |        | 8" mixed format |
+| [Micropolis](doc/disk-micropolis.md)     |  🦄   |        | Micropolis 100tpi drives |
+| [Northstar(doc/disk-northstar.md)        |  🦖   |   🦖   | 5.25" hard sectors |
+| [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 +212,21 @@ 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.
+
+As an exception, `dep/snowhouse` contains the snowhouse assertion library,
+taken from https://github.com/banditcpp/snowhouse. It is Boost Standard License
+1.0 licensed. Please see the contents of the directory for the full text.
+

arch/aeslanier/aeslanier.h

@@ -7,10 +7,12 @@
 
 class Sector;
 class Fluxmap;
+class AesLanierDecoderProto;
 
 class AesLanierDecoder : public AbstractDecoder
 {
 public:
+	AesLanierDecoder(const AesLanierDecoderProto&) {}
     virtual ~AesLanierDecoder() {}
 
     RecordType advanceToNextRecord();

arch/aeslanier/aeslanier.proto

@@ -0,0 +1,4 @@
+syntax = "proto2";
+
+message AesLanierDecoderProto {}
+

arch/amiga/amiga.h

@@ -12,26 +12,34 @@
 class Sector;
 class Fluxmap;
 class SectorSet;
+class AmigaDecoderProto;
+class AmigaEncoderProto;
 
 class AmigaDecoder : public AbstractDecoder
 {
 public:
+	AmigaDecoder(const AmigaDecoderProto&) {}
     virtual ~AmigaDecoder() {}
 
     RecordType advanceToNextRecord();
     void decodeSectorRecord();
+
+	std::set<unsigned> requiredSectors(Track& track) const;
 };
 
 class AmigaEncoder : public AbstractEncoder
 {
 public:
+	AmigaEncoder(const AmigaEncoderProto& config):
+		_config(config) {}
 	virtual ~AmigaEncoder() {}
 
 public:
     std::unique_ptr<Fluxmap> encode(int physicalTrack, int physicalSide, const SectorSet& allSectors);
-};
 
-extern FlagGroup amigaEncoderFlags;
+private:
+	const AmigaEncoderProto& _config;
+};
 
 extern uint32_t amigaChecksum(const Bytes& bytes);
 extern Bytes amigaInterleave(const Bytes& input);

arch/amiga/amiga.proto

@@ -0,0 +1,13 @@
+syntax = "proto2";
+
+import "lib/common.proto";
+
+message AmigaDecoderProto {}
+
+message AmigaEncoderProto {
+	optional double clock_rate_us = 1
+		[default=2.00, (help)="Encoded data clock rate."];
+	optional double post_index_gap_ms = 2
+		[default=0.5, (help)="Post-index gap before first sector header."];
+}
+

arch/amiga/decoder.cc

@@ -32,6 +32,8 @@ 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);
 
@@ -56,3 +58,10 @@ void AmigaDecoder::decodeSectorRecord()
     _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;
+}
+

arch/amiga/encoder.cc

@@ -6,18 +6,9 @@
 #include "crc.h"
 #include "sectorset.h"
 #include "writer.h"
+#include "arch/amiga/amiga.pb.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)
 {
@@ -31,13 +22,14 @@ static void write_bits(std::vector<bool>& bits, unsigned& cursor, const std::vec
 	for (bool bit : src)
 	{
 		if (cursor < bits.size())
-			bits[cursor++] = bit;
+			lastBit = bits[cursor++] = bit;
 	}
 }
 
 static void write_bits(std::vector<bool>& bits, unsigned& cursor, uint64_t data, int width)
 {
 	cursor += width;
+	lastBit = data & 1;
 	for (int i=0; i<width; i++)
 	{
 		unsigned pos = cursor - i - 1;
@@ -47,19 +39,16 @@ static void write_bits(std::vector<bool>& bits, unsigned& cursor, uint64_t data,
 	}
 }
 
-static void write_interleaved_bytes(std::vector<bool>& bits, unsigned& cursor, const Bytes& bytes)
+static void write_bits(std::vector<bool>& bits, unsigned& cursor, const Bytes& bytes)
 {
-	assert(!(bytes.size() & 3));
-	Bytes interleaved = amigaInterleave(bytes);
-	encodeMfm(bits, cursor, interleaved);
-}
+	ByteReader br(bytes);
+	BitReader bitr(br);
 
-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);
+	while (!bitr.eof())
+	{
+		if (cursor < bits.size())
+			bits[cursor++] = bitr.get();
+	}
 }
 
 static void write_sector(std::vector<bool>& bits, unsigned& cursor, const Sector* sector)
@@ -67,11 +56,27 @@ static void write_sector(std::vector<bool>& bits, unsigned& cursor, const Sector
 	if ((sector->data.size() != 512) && (sector->data.size() != 528))
 		Error() << "unsupported sector size --- you must pick 512 or 528";
 
+	uint32_t checksum = 0;
+
+	auto write_interleaved_bytes = [&](const Bytes& bytes)
+	{
+		Bytes interleaved = amigaInterleave(bytes);
+		Bytes mfm = encodeMfm(interleaved, lastBit);
+		checksum ^= amigaChecksum(mfm);
+		checksum &= 0x55555555;
+		write_bits(bits, cursor, mfm);
+	};
+
+	auto write_interleaved_word = [&](uint32_t word)
+	{
+		Bytes b(4);
+		b.writer().write_be32(word);
+		write_interleaved_bytes(b);
+	};
+
     write_bits(bits, cursor, AMIGA_SECTOR_RECORD, 6*8);
 
-	std::vector<bool> headerBits(20*16);
-	unsigned headerCursor = 0;
-
+	checksum = 0;
 	Bytes header = 
 		{
 			0xff, /* Amiga 1.0 format byte */
@@ -79,22 +84,16 @@ static void write_sector(std::vector<bool>& bits, unsigned& cursor, const Sector
 			(uint8_t) sector->logicalSector,
 			(uint8_t) (AMIGA_SECTORS_PER_TRACK - sector->logicalSector)
 		};
-	write_interleaved_bytes(headerBits, headerCursor, header);
+	write_interleaved_bytes(header);
 	Bytes recoveryInfo(16);
 	if (sector->data.size() == 528)
 		recoveryInfo = sector->data.slice(512, 16);
-	write_interleaved_bytes(headerBits, headerCursor, recoveryInfo);
+	write_interleaved_bytes(recoveryInfo);
+	write_interleaved_word(checksum);
 
-	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);
+	Bytes data = sector->data.slice(0, 512);
+	write_interleaved_word(amigaChecksum(encodeMfm(amigaInterleave(data), lastBit)));
+	write_interleaved_bytes(data);
 }
 
 std::unique_ptr<Fluxmap> AmigaEncoder::encode(
@@ -103,11 +102,12 @@ std::unique_ptr<Fluxmap> AmigaEncoder::encode(
 	if ((physicalTrack < 0) || (physicalTrack >= AMIGA_TRACKS_PER_DISK))
 		return std::unique_ptr<Fluxmap>();
 
-	int bitsPerRevolution = 200000.0 / clockRateUs;
+	int bitsPerRevolution = 200000.0 / _config.clock_rate_us();
 	std::vector<bool> bits(bitsPerRevolution);
 	unsigned cursor = 0;
 
-    fillBitmapTo(bits, cursor, postIndexGapMs * 1000 / clockRateUs, { true, false });
+    fillBitmapTo(bits, cursor, _config.post_index_gap_ms() * 1000 / _config.clock_rate_us(), { true, false });
+	lastBit = false;
 
 	for (int sectorId=0; sectorId<AMIGA_SECTORS_PER_TRACK; sectorId++)
 	{
@@ -120,7 +120,7 @@ std::unique_ptr<Fluxmap> AmigaEncoder::encode(
 	fillBitmapTo(bits, cursor, bits.size(), { true, false });
 
 	std::unique_ptr<Fluxmap> fluxmap(new Fluxmap);
-	fluxmap->appendBits(bits, clockRateUs*1e3);
+	fluxmap->appendBits(bits, _config.clock_rate_us()*1e3);
 	return fluxmap;
 }
 

arch/apple2/apple2.h

@@ -9,10 +9,12 @@
 
 class Sector;
 class Fluxmap;
+class Apple2DecoderProto;
 
 class Apple2Decoder : public AbstractDecoder
 {
 public:
+	Apple2Decoder(const Apple2DecoderProto&) {}
     virtual ~Apple2Decoder() {}
 
     RecordType advanceToNextRecord();

arch/apple2/apple2.proto

@@ -0,0 +1,4 @@
+syntax = "proto2";
+
+message Apple2DecoderProto {}
+

arch/brother/brother.h

@@ -9,15 +9,20 @@
 #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;
+class SectorSet;
 class Fluxmap;
+class BrotherDecoderProto;
+class BrotherEncoderProto;
 
 class BrotherDecoder : public AbstractDecoder
 {
 public:
+    BrotherDecoder(const BrotherDecoderProto& config) {}
     virtual ~BrotherDecoder() {}
 
     RecordType advanceToNextRecord();
@@ -28,12 +33,17 @@ public:
 class BrotherEncoder : public AbstractEncoder
 {
 public:
+	BrotherEncoder(const BrotherEncoderProto& config):
+		_config(config)
+	{}
+
 	virtual ~BrotherEncoder() {}
 
+private:
+	const BrotherEncoderProto& _config;
+
 public:
     std::unique_ptr<Fluxmap> encode(int physicalTrack, int physicalSide, const SectorSet& allSectors);
 };
 
-extern FlagGroup brotherEncoderFlags;
-
 #endif

arch/brother/brother.proto

@@ -0,0 +1,20 @@
+syntax = "proto2";
+
+message BrotherDecoderProto {}
+
+enum BrotherFormat {
+	BROTHER240 = 0;
+	BROTHER120 = 1;
+};
+
+message BrotherEncoderProto {
+	optional double clock_rate_us = 1 [default = 3.83];
+	optional double post_index_gap_ms = 2 [default = 1.0];
+	optional double sector_spacing_ms = 3 [default = 16.2];
+	optional double post_header_spacing_ms = 4 [default = 0.69];
+	optional string sector_skew = 5 [default = "05a3816b4927"];
+
+	optional BrotherFormat format = 6 [default = BROTHER240];
+	optional int32 bias = 7 [default = 0];
+}
+

arch/brother/encoder.cc

@@ -6,6 +6,7 @@
 #include "crc.h"
 #include "sectorset.h"
 #include "writer.h"
+#include "arch/brother/brother.pb.h"
 
 FlagGroup brotherEncoderFlags;
 
@@ -129,9 +130,25 @@ 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 -= _config.bias();
+	switch (_config.format())
+	{
+		case BROTHER120:
+			if ((physicalTrack < 0) || (physicalTrack >= (BROTHER_TRACKS_PER_120KB_DISK*2))
+					|| (physicalTrack & 1))
+				return std::unique_ptr<Fluxmap>();
+			logicalTrack = physicalTrack/2;
+			break;
+
+		case BROTHER240:
+			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();
@@ -146,10 +163,10 @@ 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);
 	}

arch/c64/c64.h

@@ -1,16 +1,42 @@
 #ifndef C64_H
 #define C64_H
 
+#include "decoders/decoders.h"
+#include "encoders/encoders.h"
+
 #define C64_SECTOR_RECORD    0xffd49
 #define C64_DATA_RECORD      0xffd57
 #define C64_SECTOR_LENGTH    256
 
+/* Source: http://www.unusedino.de/ec64/technical/formats/g64.html 
+   1. Header sync       FF FF FF FF FF (40 'on' bits, not GCR)
+   2. Header info       52 54 B5 29 4B 7A 5E 95 55 55 (10 GCR bytes)
+   3. Header gap        55 55 55 55 55 55 55 55 55 (9 bytes, never read)
+   4. Data sync         FF FF FF FF FF (40 'on' bits, not GCR)
+   5. Data block        55...4A (325 GCR bytes)
+   6. Inter-sector gap  55 55 55 55...55 55 (4 to 12 bytes, never read)
+   1. Header sync       (SYNC for the next sector)
+*/
+#define C64_HEADER_DATA_SYNC        0xFF
+#define C64_HEADER_BLOCK_ID         0x08
+#define C64_DATA_BLOCK_ID           0x07
+#define C64_HEADER_GAP              0x55
+#define C64_INTER_SECTOR_GAP        0x55
+#define C64_PADDING                 0x0F
+
+#define C64_TRACKS_PER_DISK         40
+#define C64_BAM_TRACK               17
+
+
 class Sector;
 class Fluxmap;
+class Commodore64DecoderProto;
+class Commodore64EncoderProto;
 
 class Commodore64Decoder : public AbstractDecoder
 {
 public:
+	Commodore64Decoder(const Commodore64DecoderProto&) {}
     virtual ~Commodore64Decoder() {}
 
     RecordType advanceToNextRecord();
@@ -18,4 +44,25 @@ public:
     void decodeDataRecord();
 };
 
+class Commodore64Encoder : public AbstractEncoder
+{
+public:
+	Commodore64Encoder(const Commodore64EncoderProto& config):
+		_config(config)
+	{}
+
+	virtual ~Commodore64Encoder() {}
+
+public:
+    std::unique_ptr<Fluxmap> encode(int physicalTrack, int physicalSide, const SectorSet& allSectors);
+
+private:
+	void writeSector(std::vector<bool>& bits, unsigned& cursor, const Sector* sector) const;
+	
+private:
+	const Commodore64EncoderProto& _config;
+	uint8_t _formatByte1;
+	uint8_t _formatByte2;
+};
+
 #endif

arch/c64/c64.proto

@@ -0,0 +1,13 @@
+syntax = "proto2";
+
+import "lib/common.proto";
+
+message Commodore64DecoderProto {}
+
+message Commodore64EncoderProto {
+	optional double post_index_gap_us = 1 [default=0.0,
+		(help) = "post-index gap before first sector header."];
+	optional double clock_compensation_factor = 2 [default=1.0,
+		(help) = "scale the output clock by this much."];
+}
+

arch/c64/encoder.cc

@@ -0,0 +1,349 @@
+#include "globals.h"
+#include "record.h"
+#include "decoders/decoders.h"
+#include "encoders/encoders.h"
+#include "c64.h"
+#include "crc.h"
+#include "sectorset.h"
+#include "sector.h"
+#include "writer.h"
+#include "fmt/format.h"
+#include "arch/c64/c64.pb.h"
+#include <ctype.h>
+#include "bytes.h"
+
+static bool lastBit;
+
+static double clockRateUsForTrack(unsigned track)
+{
+    /*
+     * Track   # Sectors/Track Speed Zone  bits/rotation       
+     * 1 – 17          21          3       61,538.4
+     * 18 – 24         19          2       57,142.8
+     * 25 – 30         18          1       53,333.4
+     * 31 – 35         17          0       50,000.0
+    */
+    if (track < 17)
+        return 200000.0/61538.4;
+    if (track < 24)
+        return 200000.0/57142.8;
+    if (track < 30)
+        return 200000.0/53333.4;
+    return 200000.0/50000.0;
+
+}
+
+static unsigned sectorsForTrack(unsigned track)
+{
+    /*
+     * Track   Sectors/track   # Sectors   Storage in Bytes
+     *   -----   -------------   ---------   ----------------
+     *    1-17        21            357           7820
+     *   18-24        19            133           7170
+     *   25-30        18            108           6300
+     *   31-40(*)     17             85           6020
+     *                              ---
+     *                              683 (for a 35 track image)
+     */
+    if (track < 17)
+        return 21;
+    if (track < 24)
+        return 19;
+    if (track < 30)
+        return 18;
+    return 17;
+}
+
+static int encode_data_gcr(uint8_t data)
+{
+    switch (data)
+    {
+        #define GCR_ENTRY(gcr, data) \
+            case data: return gcr;
+        #include "data_gcr.h"
+        #undef GCR_ENTRY
+    }
+    return -1;
+};
+
+static void write_bits(std::vector<bool>& bits, unsigned& cursor, const std::vector<bool>& src)
+{
+    for (bool bit : src)  //Range-based for loop
+    {
+        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;
+    }
+}
+
+void bindump(std::ostream& stream, std::vector<bool>& buffer)
+{
+    size_t pos = 0;
+
+    while ((pos < buffer.size()) and (pos <520))
+    {
+        stream << fmt::format("{:5d} : ", pos);
+        for (int i=0; i<40; i++)
+        {
+            if ((pos+i) < buffer.size())
+                stream << fmt::format("{:01b}", (buffer[pos+i]));
+            else
+                stream << "-- ";
+            if ((((pos + i + 1) % 8) == 0) and i != 0)
+                stream << "  ";
+
+        }
+        stream << std::endl;
+        pos += 40;
+    }
+}
+static std::vector<bool> encode_data(uint8_t input)
+{
+    /*
+    * Four 8-bit data bytes are converted to four 10-bit GCR bytes at a time by
+    * the 1541 DOS.  RAM is only an 8-bit storage device though. This hardware
+    * limitation prevents a 10-bit GCR byte from being stored in a single
+    * memory location. Four 10-bit GCR bytes total 40 bits - a number evenly
+    * divisible by our overriding 8-bit constraint. Commodore sub- divides the
+    * 40 GCR bits into five 8-bit bytes to solve this dilemma. This explains
+    * why four 8-bit data bytes are converted to GCR form at a time. The
+    * following step by step example demonstrates how this bit manipulation is
+    * performed by the DOS.
+    *
+    * STEP 1. Four 8-bit Data Bytes
+    * $08 $10 $00 $12
+    *
+    * STEP 2. Hexadecimal to Binary Conversion
+    * 1. Binary Equivalents
+    * $08       $10         $00         $12
+    * 00001000  00010000    00000000    00010010
+    *
+    * STEP 3. Binary to GCR Conversion
+    * 1. Four 8-bit Data Bytes
+    * 00001000 00010000 00000000 00010010
+    * 2. High and Low Nybbles
+    * 0000 1000 0001 0000 0000 0000 0001 0010
+    * 3. High and Low Nybble GCR Equivalents
+    * 01010 01001 01011 01010 01010 01010 01011 10010
+    * 4. Four 10-bit GCR Bytes
+    * 0101001001 0101101010 0101001010 0101110010
+    *
+    * STEP 4. 10-bit GCR to 8-bit GCR Conversion
+    *   1. Concatenate Four 10-bit GCR Bytes
+    *   0101001001010110101001010010100101110010
+    *   2. Five 8-bit Subdivisions
+    *   01010010 01010110 10100101 00101001 01110010
+    *
+    * STEP 5. Binary to Hexadecimal Conversion
+    * 1. Hexadecimal Equivalents
+    *   01010010    01010110    10100101    00101001    01110010
+    *   $52         $56         $A5         $29         $72
+    *
+    * STEP 6. Four 8-bit Data Bytes are Recorded as Five 8-bit GCR Bytes
+    *   $08 $10 $00 $12
+    *
+    * are recorded as
+    *   $52 $56 $A5 $29 $72
+    */
+
+    std::vector<bool> output(10, false);
+    uint8_t hi = 0;
+    uint8_t lo = 0;
+    uint8_t lo_GCR = 0;
+    uint8_t hi_GCR = 0;
+
+    //Convert the byte in high and low nibble
+    lo = input >> 4; //get the lo nibble shift the bits 4 to the right          
+    hi = input & 15; //get the hi nibble bij masking the lo bits (00001111)     
+
+
+    lo_GCR = encode_data_gcr(lo);   //example value: 0000   GCR = 01010
+    hi_GCR = encode_data_gcr(hi);   //example value: 1000   GCR = 01001
+    //output = [0,1,2,3,4,5,6,7,8,9]
+    //value  = [0,1,0,1,0,0,1,0,0,1]
+    //          01010 01001
+
+    int b = 4;
+    for (int i = 0; i < 10; i++)
+    {
+        if (i < 5) //01234
+        {       //i = 0 op 
+            output[4-i] = (lo_GCR & 1); //01010
+
+            //01010 -> & 00001 -> 00000 output[4] = 0
+            //00101 -> & 00001 -> 00001 output[3] = 1
+            //00010 -> & 00001 -> 00000 output[2] = 0
+            //00001 -> & 00001 -> 00001 output[1] = 1
+            //00000 -> & 00001 -> 00000 output[0] = 0
+            lo_GCR >>= 1;
+        } else  
+        {
+            output[i+b] = (hi_GCR & 1); //01001
+            //01001 -> & 00001 -> 00001 output[9] = 1
+            //00100 -> & 00001 -> 00000 output[8] = 0
+            //00010 -> & 00001 -> 00000 output[7] = 0
+            //00001 -> & 00001 -> 00001 output[6] = 1
+            //00000 -> & 00001 -> 00000 output[5] = 0
+            hi_GCR >>= 1;
+            b = b-2;
+        }
+    }
+    return output;
+}
+
+void Commodore64Encoder::writeSector(std::vector<bool>& bits, unsigned& cursor, const Sector* sector) const
+{
+    /* Source: http://www.unusedino.de/ec64/technical/formats/g64.html 
+     * 1. Header sync       FF FF FF FF FF (40 'on' bits, not GCR)
+     * 2. Header info       52 54 B5 29 4B 7A 5E 95 55 55 (10 GCR bytes)
+     * 3. Header gap        55 55 55 55 55 55 55 55 55 (9 bytes, never read)
+     * 4. Data sync         FF FF FF FF FF (40 'on' bits, not GCR)
+     * 5. Data block        55...4A (325 GCR bytes)
+     * 6. Inter-sector gap  55 55 55 55...55 55 (4 to 12 bytes, never read)
+     * 1. Header sync       (SYNC for the next sector)
+    */
+    if ((sector->status == Sector::OK) or (sector->status == Sector::BAD_CHECKSUM))
+    {
+        // There is data to encode to disk.
+        if ((sector->data.size() != C64_SECTOR_LENGTH))
+            Error() << fmt::format("unsupported sector size {} --- you must pick 256", sector->data.size());    
+
+        // 1. Write header Sync (not GCR)
+        for (int i=0; i<6; i++)
+            write_bits(bits, cursor, C64_HEADER_DATA_SYNC, 1*8); /* sync */
+
+        // 2. Write Header info 10 GCR bytes
+        /*
+         * The 10 byte header info (#2) is GCR encoded and must be decoded  to
+         * it's normal 8 bytes to be understood. Once decoded, its breakdown is
+         * as follows:
+         * 
+         * Byte $00 - header block ID           ($08)
+         *   01 - header block checksum 16  (EOR of $02-$05)
+         *   02 - Sector
+         *   03 - Track
+         *   04 - Format ID byte #2
+         *   05 - Format ID byte #1
+         *   06-07 - $0F ("off" bytes)
+         */
+        uint8_t encodedTrack = ((sector->logicalTrack) + 1); // C64 track numbering starts with 1. Fluxengine with 0.
+        uint8_t encodedSector = sector->logicalSector;
+        // uint8_t formatByte1 = C64_FORMAT_ID_BYTE1;
+        // uint8_t formatByte2 = C64_FORMAT_ID_BYTE2;
+        uint8_t headerChecksum = (encodedTrack ^ encodedSector ^ _formatByte1 ^ _formatByte2);
+        write_bits(bits, cursor, encode_data(C64_HEADER_BLOCK_ID));
+        write_bits(bits, cursor, encode_data(headerChecksum));
+        write_bits(bits, cursor, encode_data(encodedSector));
+        write_bits(bits, cursor, encode_data(encodedTrack));
+        write_bits(bits, cursor, encode_data(_formatByte2));
+        write_bits(bits, cursor, encode_data(_formatByte1));
+        write_bits(bits, cursor, encode_data(C64_PADDING));
+        write_bits(bits, cursor, encode_data(C64_PADDING));
+
+        // 3. Write header GAP not GCR
+        for (int i=0; i<9; i++)
+            write_bits(bits, cursor, C64_HEADER_GAP, 1*8); /* header gap */
+
+        // 4. Write Data sync not GCR
+        for (int i=0; i<6; i++)
+            write_bits(bits, cursor, C64_HEADER_DATA_SYNC, 1*8); /* sync */
+
+        // 5. Write data block 325 GCR bytes
+        /*
+         * The 325 byte data block (#5) is GCR encoded and must be  decoded  to  its
+         * normal 260 bytes to be understood. The data block is made up of the following:
+         * 
+         * Byte    $00 - data block ID ($07)
+         *      01-100 - 256 bytes data
+         *      101 - data block checksum (EOR of $01-100)
+         *      102-103 - $00 ("off" bytes, to make the sector size a multiple of 5)
+         */
+
+        write_bits(bits, cursor, encode_data(C64_DATA_BLOCK_ID));
+        uint8_t dataChecksum = xorBytes(sector->data);
+        ByteReader br(sector->data);
+        int i = 0;
+        for (i = 0; i < C64_SECTOR_LENGTH; i++)
+        {
+            uint8_t val = br.read_8();
+            write_bits(bits, cursor, encode_data(val));     
+        }
+        write_bits(bits, cursor, encode_data(dataChecksum));
+        write_bits(bits, cursor, encode_data(C64_PADDING));
+        write_bits(bits, cursor, encode_data(C64_PADDING));
+
+        //6. Write inter-sector gap 9 - 12 bytes nor gcr
+        for (int i=0; i<9; i++)
+            write_bits(bits, cursor, C64_INTER_SECTOR_GAP, 1*8); /* sync */
+
+    }
+}
+
+std::unique_ptr<Fluxmap> Commodore64Encoder::encode(
+    int physicalTrack, int physicalSide, const SectorSet& allSectors)
+{
+    /* The format ID Character # 1 and # 2 are in the .d64 image only present
+     * in track 18 sector zero which contains the BAM info in byte 162 and 163.
+     * it is written in every header of every sector and track. headers are not
+     * stored in a d64 disk image so we have to get it from track 18 which
+     * contains the BAM.
+    */
+
+    const auto& sectorData = allSectors.get(C64_BAM_TRACK*2, 0, 0); //Read de BAM to get the DISK ID bytes
+    if (sectorData)
+    {
+        ByteReader br(sectorData->data);
+        br.seek(162); //goto position of the first Disk ID Byte
+        _formatByte1 = br.read_8();
+        _formatByte2 = br.read_8();
+    }
+    else
+        _formatByte1 = _formatByte2 = 0;
+    
+    int logicalTrack = physicalTrack / 2;
+    double clockRateUs = clockRateUsForTrack(logicalTrack) * _config.clock_compensation_factor();
+
+    int bitsPerRevolution = 200000.0 / clockRateUs;
+
+    std::vector<bool> bits(bitsPerRevolution);
+    unsigned cursor = 0;
+
+    fillBitmapTo(bits, cursor, _config.post_index_gap_us() / clockRateUs, { true, false });
+    lastBit = false;
+
+    unsigned numSectors = sectorsForTrack(logicalTrack);
+    unsigned writtenSectors = 0;
+    for (int sectorId=0; sectorId<numSectors; sectorId++)
+    {
+        const auto& sectorData = allSectors.get(physicalTrack, physicalSide, sectorId);
+        if (sectorData)
+        {
+            writeSector(bits, cursor, sectorData);
+            writtenSectors++;
+        }
+    }
+    if (writtenSectors == 0)
+        return std::unique_ptr<Fluxmap>();
+
+    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;
+}
+
+// vim: sw=4 ts=4 et
+

arch/f85/f85.h

@@ -7,10 +7,12 @@
 
 class Sector;
 class Fluxmap;
+class F85DecoderProto;
 
 class DurangoF85Decoder : public AbstractDecoder
 {
 public:
+	DurangoF85Decoder(const F85DecoderProto&) {}
     virtual ~DurangoF85Decoder() {}
 
     RecordType advanceToNextRecord();

arch/f85/f85.proto

@@ -0,0 +1,4 @@
+syntax = "proto2";
+
+message F85DecoderProto {}
+

arch/fb100/fb100.h

@@ -8,10 +8,12 @@
 class Sector;
 class Fluxmap;
 class Track;
+class Fb100DecoderProto;
 
 class Fb100Decoder : public AbstractDecoder
 {
 public:
+	Fb100Decoder(const Fb100DecoderProto&) {}
     virtual ~Fb100Decoder() {}
 
     RecordType advanceToNextRecord();

arch/fb100/fb100.proto

@@ -0,0 +1,4 @@
+syntax = "proto2";
+
+message Fb100DecoderProto {}
+

arch/ibm/decoder.cc

@@ -6,6 +6,8 @@
 #include "decoders/fluxmapreader.h"
 #include "sector.h"
 #include "record.h"
+#include "arch/ibm/ibm.pb.h"
+#include "proto.h"
 #include <string.h>
 
 static_assert(std::is_trivially_copyable<IbmIdam>::value,
@@ -57,11 +59,11 @@ 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:
@@ -89,6 +91,11 @@ const FluxMatchers ANY_RECORD_PATTERN(
     }
 );
 
+std::set<unsigned> IbmDecoder::requiredSectors(Track& track) const
+{
+	return iterate(_config.required_sectors());
+}
+
 AbstractDecoder::RecordType IbmDecoder::advanceToNextRecord()
 {
 	const FluxMatcher* matcher = nullptr;
@@ -131,14 +138,14 @@ void IbmDecoder::decodeSectorRecord()
     br.read_8(); /* skip ID byte */
     _sector->logicalTrack = br.read_8();
     _sector->logicalSide = br.read_8();
-    _sector->logicalSector = br.read_8() - _sectorBase;
+    _sector->logicalSector = br.read_8() - _config.sector_id_base();
     _currentSectorSize = 1 << (br.read_8() + 7);
     uint16_t wantCrc = br.read_be16();
     uint16_t gotCrc = crc16(CCITT_POLY, bytes.slice(0, _currentHeaderLength + 5));
     if (wantCrc == gotCrc)
         _sector->status = Sector::DATA_MISSING; /* correct but unintuitive */
 
-    if (_ignoreSideByte)
+    if (_config.ignore_side_byte())
         _sector->logicalSide = _sector->physicalSide;
 }
 

arch/ibm/encoder.cc

@@ -0,0 +1,258 @@
+#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 "arch/ibm/ibm.pb.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;
+	}
+}
+
+static uint8_t decodeUint16(uint16_t raw)
+{
+	Bytes b;
+	ByteWriter bw(b);
+	bw.write_be16(raw);
+	return decodeFmMfm(b.toBits())[0];
+}
+
+void IbmEncoder::getTrackFormat(IbmEncoderProto::TrackdataProto& trackdata, unsigned cylinder, unsigned head)
+{
+	trackdata.Clear();
+	for (const auto& f : _config.trackdata())
+	{
+		if (f.has_cylinder() && (f.cylinder() != cylinder))
+			continue;
+		if (f.has_head() && (f.head() != head))
+			continue;
+
+		trackdata.MergeFrom(f);
+	}
+}
+
+std::unique_ptr<Fluxmap> IbmEncoder::encode(
+	int physicalTrack, int physicalSide, const SectorSet& allSectors)
+{
+	IbmEncoderProto::TrackdataProto trackdata;
+	getTrackFormat(trackdata, physicalTrack, physicalSide);
+
+	auto writeBytes = [&](const Bytes& bytes)
+	{
+		if (trackdata.use_fm())
+			encodeFm(_bits, _cursor, bytes);
+		else
+			encodeMfm(_bits, _cursor, bytes, _lastBit);
+	};
+
+	auto writeFillerBytes = [&](int count, uint8_t byte)
+	{
+		Bytes bytes = { byte };
+		for (int i=0; i<count; i++)
+			writeBytes(bytes);
+	};
+
+	if (trackdata.swap_sides())
+		physicalSide = 1 - physicalSide;
+	double clockRateUs = 1e3 / trackdata.clock_rate_khz();
+	if (!trackdata.use_fm())
+		clockRateUs /= 2.0;
+	int bitsPerRevolution = (trackdata.track_length_ms() * 1000.0) / clockRateUs;
+	_bits.resize(bitsPerRevolution);
+	_cursor = 0;
+
+	uint8_t idamUnencoded = decodeUint16(trackdata.idam_byte());
+	uint8_t damUnencoded = decodeUint16(trackdata.dam_byte());
+
+	uint8_t sectorSize = 0;
+	{
+		int s = trackdata.sector_size() >> 7;
+		while (s > 1)
+		{
+			s >>= 1;
+			sectorSize += 1;
+		}
+	}
+
+	uint8_t gapFill = trackdata.use_fm() ? 0x00 : 0x4e;
+
+	writeFillerBytes(trackdata.gap0(), gapFill);
+	if (trackdata.emit_iam())
+	{
+		writeFillerBytes(trackdata.use_fm() ? 6 : 12, 0x00);
+		if (!trackdata.use_fm())
+		{
+			for (int i=0; i<3; i++)
+				writeRawBits(MFM_IAM_SEPARATOR, 16);
+		}
+		writeRawBits(trackdata.use_fm() ? FM_IAM_RECORD : MFM_IAM_RECORD, 16);
+		writeFillerBytes(trackdata.gap1(), gapFill);
+	}
+
+	bool first = true;
+	for (char sectorChar : trackdata.sector_skew())
+	{
+		int sectorId = charToInt(sectorChar);
+		if (!first)
+			writeFillerBytes(trackdata.gap3(), gapFill);
+		first = false;
+
+		const auto& sectorData = allSectors.get(physicalTrack, physicalSide, sectorId);
+		if (!sectorData)
+		{
+			/* If there are any missing sectors, this is an empty track. */
+			return std::unique_ptr<Fluxmap>();
+		}
+
+		/* 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);
+
+			writeFillerBytes(trackdata.use_fm() ? 6 : 12, 0x00);
+			if (!trackdata.use_fm())
+			{
+				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 + trackdata.start_sector_id());
+			bw.write_8(sectorSize);
+			uint16_t crc = crc16(CCITT_POLY, header);
+			bw.write_be16(crc);
+
+			int conventionalHeaderStart = 0;
+			if (!trackdata.use_fm())
+			{
+				for (int i=0; i<3; i++)
+					writeRawBits(MFM_RECORD_SEPARATOR, 16);
+				conventionalHeaderStart += 3;
+
+			}
+			writeRawBits(trackdata.idam_byte(), 16);
+			conventionalHeaderStart += 1;
+
+			writeBytes(header.slice(conventionalHeaderStart));
+		}
+
+		writeFillerBytes(trackdata.gap2(), gapFill);
+
+		{
+			Bytes data;
+			ByteWriter bw(data);
+
+			writeFillerBytes(trackdata.use_fm() ? 6 : 12, 0x00);
+			if (!trackdata.use_fm())
+			{
+				for (int i=0; i<3; i++)
+					bw.write_8(MFM_RECORD_SEPARATOR_BYTE);
+			}
+			bw.write_8(damUnencoded);
+
+			Bytes truncatedData = sectorData->data.slice(0, trackdata.sector_size());
+			bw += truncatedData;
+			uint16_t crc = crc16(CCITT_POLY, data);
+			bw.write_be16(crc);
+
+			int conventionalHeaderStart = 0;
+			if (!trackdata.use_fm())
+			{
+				for (int i=0; i<3; i++)
+					writeRawBits(MFM_RECORD_SEPARATOR, 16);
+				conventionalHeaderStart += 3;
+
+			}
+			writeRawBits(trackdata.dam_byte(), 16);
+			conventionalHeaderStart += 1;
+
+			writeBytes(data.slice(conventionalHeaderStart));
+		}
+    }
+
+	if (_cursor >= _bits.size())
+		Error() << "track data overrun";
+	while (_cursor < _bits.size())
+		writeFillerBytes(1, gapFill);
+
+	std::unique_ptr<Fluxmap> fluxmap(new Fluxmap);
+	fluxmap->appendBits(_bits, clockRateUs*1e3);
+	return fluxmap;
+}
+

arch/ibm/ibm.h

@@ -2,6 +2,8 @@
 #define IBM_H
 
 #include "decoders/decoders.h"
+#include "encoders/encoders.h"
+#include "arch/ibm/ibm.pb.h"
 
 /* IBM format (i.e. ordinary PC floppies). */
 
@@ -31,68 +33,45 @@ struct IbmIdam
 class IbmDecoder : public AbstractDecoder
 {
 public:
-    IbmDecoder(unsigned sectorBase, bool ignoreSideByte=false):
-        _sectorBase(sectorBase),
-        _ignoreSideByte(ignoreSideByte)
+    IbmDecoder(const IbmDecoderProto& config):
+		_config(config)
     {}
 
     RecordType advanceToNextRecord();
     void decodeSectorRecord();
     void decodeDataRecord();
 
+	std::set<unsigned> requiredSectors(Track& track) const;
+
 private:
-    unsigned _sectorBase;
-    bool _ignoreSideByte;
+	const IbmDecoderProto& _config;
     unsigned _currentSectorSize;
     unsigned _currentHeaderLength;
 };
 
-#if 0
-class AbstractIbmDecoder : public AbstractSoftSectorDecoder
+class IbmEncoder : public AbstractEncoder
 {
 public:
-    AbstractIbmDecoder(unsigned sectorIdBase):
-        _sectorIdBase(sectorIdBase)
-    {}
-    virtual ~AbstractIbmDecoder() {}
+	IbmEncoder(const IbmEncoderProto& config):
+		_config(config)
+	{}
 
-    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 writeSync();
+	
+	void getTrackFormat(IbmEncoderProto::TrackdataProto& format, unsigned track, unsigned side);
+
+private:
+	const IbmEncoderProto& _config;
+	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

arch/ibm/ibm.proto

@@ -0,0 +1,34 @@
+syntax = "proto2";
+
+import "lib/common.proto";
+
+message IbmDecoderProto {
+	optional int32 sector_id_base = 1        [default = 1, (help) = "ID of first sector"];
+	optional bool ignore_side_byte = 2       [default = false, (help) = "ignore side byte in sector header"];
+	optional RangeProto required_sectors = 3 [(help) = "require these sectors to exist for a good read"];
+}
+
+message IbmEncoderProto {
+	message TrackdataProto {
+		optional int32 cylinder = 15        [(help) = "if set, the format applies only to this track"];
+		optional int32 head = 16            [(help) = "if set, the format applies only to this head"];
+
+		optional double track_length_ms = 1 [(help) = "length of track"];
+		optional int32 sector_size = 2      [default=512, (help) = "number of bytes per sector"];
+		optional bool emit_iam = 3          [default=true, (help) = "whether to emit an IAM record"];
+		optional int32 start_sector_id = 4  [default=1, (help) = "ID of first sector"];
+		optional double clock_rate_khz = 5  [(help) = "data clock rate"];
+		optional bool use_fm = 6            [default=false, (help) = "whether to use FM encoding rather than MFM"];
+		optional int32 idam_byte = 7        [default=0x5554, (help) = "16-bit raw bit pattern of IDAM byte"];
+		optional int32 dam_byte = 8         [default=0x5545, (help) = "16-bit raw bit pattern of DAM byte"];
+		optional int32 gap0 = 9             [default=80, (help) = "size of gap 1 (the post-index gap)"];
+		optional int32 gap1 = 10            [default=50, (help) = "size of gap 2 (the post-ID gap)"];
+		optional int32 gap2 = 11            [default=22, (help) = "size of gap 3 (the pre-data gap)"];
+		optional int32 gap3 = 12            [default=80, (help) = "size of gap 4 (the post-data or format gap)"];
+		optional string sector_skew = 13    [(help) = "order to emit sectors"];
+		optional bool swap_sides = 14       [default=false, (help) = "swap side bytes when writing"];
+	}
+
+	repeated TrackdataProto trackdata = 1;
+}
+

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;
+}
+
+

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;
+}
+

arch/macintosh/macintosh.h

@@ -1,24 +1,48 @@
 #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;
+class MacintoshDecoderProto;
+class MacintoshEncoderProto;
 
 class MacintoshDecoder : public AbstractDecoder
 {
 public:
+	MacintoshDecoder(const MacintoshDecoderProto&) {}
     virtual ~MacintoshDecoder() {}
 
     RecordType advanceToNextRecord();
     void decodeSectorRecord();
     void decodeDataRecord();
+
+	std::set<unsigned> requiredSectors(Track& track) const;
 };
 
+class MacintoshEncoder : public AbstractEncoder
+{
+public:
+	MacintoshEncoder(const MacintoshEncoderProto&) {}
+	virtual ~MacintoshEncoder() {}
+
+public:
+    std::unique_ptr<Fluxmap> encode(int physicalTrack, int physicalSide, const SectorSet& allSectors);
+};
+
+extern FlagGroup macintoshEncoderFlags;
+
+
 #endif
 

arch/macintosh/macintosh.proto

@@ -0,0 +1,5 @@
+syntax = "proto2";
+
+message MacintoshDecoderProto {}
+message MacintoshEncoderProto {}
+

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;
+}

arch/micropolis/micropolis.h

@@ -0,0 +1,20 @@
+#ifndef MICROPOLIS_H
+#define MICROPOLIS_H
+
+#define MICROPOLIS_ENCODED_SECTOR_SIZE (1+2+266+6)
+
+class Sector;
+class Fluxmap;
+class MicropolisDecoderProto;
+
+class MicropolisDecoder : public AbstractDecoder
+{
+public:
+	MicropolisDecoder(const MicropolisDecoderProto&) {}
+	virtual ~MicropolisDecoder() {}
+
+	RecordType advanceToNextRecord();
+	void decodeSectorRecord();
+};
+
+#endif

arch/micropolis/micropolis.proto

@@ -0,0 +1,4 @@
+syntax = "proto2";
+
+message MicropolisDecoderProto {}
+

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)
     {

arch/mx/mx.h

@@ -3,9 +3,12 @@
 
 #include "decoders/decoders.h"
 
+class MxDecoderProto;
+
 class MxDecoder : public AbstractDecoder
 {
 public:
+	MxDecoder(const MxDecoderProto&) {}
     virtual ~MxDecoder() {}
 
     void beginTrack();

arch/mx/mx.proto

@@ -0,0 +1,4 @@
+syntax = "proto2";
+
+message MxDecoderProto {}
+

arch/northstar/decoder.cc

@@ -0,0 +1,175 @@
+/* Decoder for North Star 10-sector hard-sectored disks.
+ *
+ * Supports both single- and double-density.  For the sector format and
+ * checksum algorithm, see pp. 33 of the North Star Double Density Controller
+ * manual:
+ *
+ * http://bitsavers.org/pdf/northstar/boards/Northstar_MDS-A-D_1978.pdf
+ *
+ * North Star disks do not contain any track/head/sector information
+ * encoded in the sector record.  For this reason, we have to be absolutely
+ * sure that the hardSectorId is correct.
+ */
+
+#include "globals.h"
+#include "fluxmap.h"
+#include "decoders/fluxmapreader.h"
+#include "decoders/decoders.h"
+#include "sector.h"
+#include "northstar.h"
+#include "bytes.h"
+#include "fmt/format.h"
+
+/*
+ * MFM sectors have 32 bytes of 00's followed by two sync characters,
+ * specified in the North Star MDS manual as 0xFBFB.
+ *
+ * This is true for most disks; however, I found a few disks, including an
+ * original North Star DOS/BASIC v2.2.1 DQ disk) that uses 0xFBnn, where
+ * nn is an incrementing pattern.
+ *
+ * 00        00        00        F         B
+ * 0000 0000 0000 0000 0000 0000 0101 0101 0100 0101
+ * A    A    A    A    A    A    5    5    4    5
+ */
+static const FluxPattern MFM_PATTERN(64, 0xAAAAAAAAAAAA5545LL);
+
+/* FM sectors have 16 bytes of 00's followed by 0xFB.
+ * 00        FB
+ * 0000 0000 1111 1111 1110 1111
+ * A    A    F    F    E    F
+ */
+static const FluxPattern FM_PATTERN(64, 0xAAAAAAAAAAAAFFEFLL);
+
+const FluxMatchers ANY_SECTOR_PATTERN(
+	{
+		&MFM_PATTERN,
+		&FM_PATTERN,
+	}
+);
+
+/* Search for FM or MFM sector record */
+AbstractDecoder::RecordType NorthstarDecoder::advanceToNextRecord()
+{
+	nanoseconds_t now = _fmr->tell().ns();
+
+	/* For all but the first sector, seek to the next sector pulse.
+	 * The first sector does not contain the sector pulse in the fluxmap.
+	 */
+	if (now != 0) {
+		_fmr->seekToIndexMark();
+		now = _fmr->tell().ns();
+	}
+
+	/* Discard a possible partial sector at the end of the track.
+	 * This partial sector could be mistaken for a conflicted sector, if
+	 * whatever data read happens to match the checksum of 0, which is
+	 * rare, but has been observed on some disks.
+	 */
+	if (now > (_fmr->getDuration() - 21e6)) {
+		_fmr->seekToIndexMark();
+		return(UNKNOWN_RECORD);
+	}
+
+	int msSinceIndex = std::round(now / 1e6);
+
+	const FluxMatcher* matcher = nullptr;
+
+	/* Note that the seekToPattern ignores the sector pulses, so if
+	 * a sector is not found for some reason, the seek will advance
+	 * past one or more sector pulses.  For this reason, calculate
+	 * _hardSectorId after the sector header is found.
+	 */
+	_sector->clock = _fmr->seekToPattern(ANY_SECTOR_PATTERN, matcher);
+
+	int sectorFoundTimeRaw = std::round((_fmr->tell().ns()) / 1e6);
+	int sectorFoundTime;
+
+	/* Round time to the nearest 20ms */
+	if ((sectorFoundTimeRaw % 20) < 10) {
+		sectorFoundTime = (sectorFoundTimeRaw / 20) * 20;
+	}
+	else {
+		sectorFoundTime = ((sectorFoundTimeRaw + 20) / 20) * 20;
+	}
+
+	/* Calculate the sector ID based on time since the index */
+	_hardSectorId = (sectorFoundTime / 20) % 10;
+
+//	std::cout << fmt::format(
+//		"Sector ID {}: hole at {}ms, sector start at {}ms",
+//		_hardSectorId, msSinceIndex, sectorFoundTimeRaw) << std::endl;
+
+	if (matcher == &MFM_PATTERN) {
+		_sectorType = SECTOR_TYPE_MFM;
+		readRawBits(48);
+		return SECTOR_RECORD;
+	}
+
+	if (matcher == &FM_PATTERN) {
+		_sectorType = SECTOR_TYPE_FM;
+		readRawBits(48);
+		return SECTOR_RECORD;
+	}
+
+	return UNKNOWN_RECORD;
+}
+
+/* Checksum is initially 0.
+ * For each data byte, XOR with the current checksum.
+ * Rotate checksum left, carrying bit 7 to bit 0.
+ */
+uint8_t northstarChecksum(const Bytes& bytes) {
+	ByteReader br(bytes);
+	uint8_t checksum = 0;
+
+	while (!br.eof()) {
+		checksum ^= br.read_8();
+		checksum = ((checksum << 1) | ((checksum >> 7)));
+	}
+
+	return checksum;
+}
+
+void NorthstarDecoder::decodeSectorRecord()
+{
+	unsigned recordSize, payloadSize, headerSize;
+
+	if (_sectorType == SECTOR_TYPE_MFM) {
+		recordSize = NORTHSTAR_ENCODED_SECTOR_SIZE_DD;
+		payloadSize = NORTHSTAR_PAYLOAD_SIZE_DD;
+		headerSize = NORTHSTAR_HEADER_SIZE_DD;
+	}
+	else {
+		recordSize = NORTHSTAR_ENCODED_SECTOR_SIZE_SD;
+		payloadSize = NORTHSTAR_PAYLOAD_SIZE_SD;
+		headerSize = NORTHSTAR_HEADER_SIZE_SD;
+	}
+
+	auto rawbits = readRawBits(recordSize * 16);
+	auto bytes = decodeFmMfm(rawbits).slice(0, recordSize);
+	ByteReader br(bytes);
+	uint8_t sync_char;
+
+	_sector->logicalSide = _sector->physicalSide;
+	_sector->logicalSector = _hardSectorId;
+	_sector->logicalTrack = _sector->physicalTrack;
+
+	sync_char = br.read_8();	/* Sync char: 0xFB */
+	if (_sectorType == SECTOR_TYPE_MFM) {
+		sync_char = br.read_8();/* MFM second Sync char, usually 0xFB */
+	}
+
+	_sector->data = br.read(payloadSize);
+
+	uint8_t wantChecksum = br.read_8();
+	uint8_t gotChecksum = northstarChecksum(bytes.slice(headerSize, payloadSize));
+
+	_sector->status = (wantChecksum == gotChecksum) ? Sector::OK : Sector::BAD_CHECKSUM;
+}
+
+std::set<unsigned> NorthstarDecoder::requiredSectors(Track& track) const
+{
+	static std::set<unsigned> sectors = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 };
+	return sectors;
+}

arch/northstar/encoder.cc

@@ -0,0 +1,130 @@
+#include "globals.h"
+#include "northstar.h"
+#include "sectorset.h"
+
+#define GAP_FILL_SIZE_SD 30
+#define PRE_HEADER_GAP_FILL_SIZE_SD 9
+#define GAP_FILL_SIZE_DD 62
+#define PRE_HEADER_GAP_FILL_SIZE_DD 16
+
+#define GAP1_FILL_BYTE	(0x4F)
+#define GAP2_FILL_BYTE	(0x4F)
+
+#define TOTAL_SECTOR_BYTES ()
+
+static void write_sector(std::vector<bool>& bits, unsigned& cursor, const Sector* sector)
+{
+	int preambleSize = 0;
+	int encodedSectorSize = 0;
+	int gapFillSize = 0;
+	int preHeaderGapFillSize = 0;
+
+	bool doubleDensity;
+
+	switch (sector->data.size()) {
+	case NORTHSTAR_PAYLOAD_SIZE_SD:
+		preambleSize = NORTHSTAR_PREAMBLE_SIZE_SD;
+		encodedSectorSize = PRE_HEADER_GAP_FILL_SIZE_SD + NORTHSTAR_ENCODED_SECTOR_SIZE_SD + GAP_FILL_SIZE_SD;
+		gapFillSize = GAP_FILL_SIZE_SD;
+		preHeaderGapFillSize = PRE_HEADER_GAP_FILL_SIZE_SD;
+		doubleDensity = false;
+		break;
+	case NORTHSTAR_PAYLOAD_SIZE_DD:
+		preambleSize = NORTHSTAR_PREAMBLE_SIZE_DD;
+		encodedSectorSize = PRE_HEADER_GAP_FILL_SIZE_DD + NORTHSTAR_ENCODED_SECTOR_SIZE_DD + GAP_FILL_SIZE_DD;
+		gapFillSize = GAP_FILL_SIZE_DD;
+		preHeaderGapFillSize = PRE_HEADER_GAP_FILL_SIZE_DD;
+		doubleDensity = true;
+		break;
+	default:
+		Error() << "unsupported sector size --- you must pick 256 or 512";
+		break;
+	}
+
+	int fullSectorSize = preambleSize + encodedSectorSize;
+	auto fullSector = std::make_shared<std::vector<uint8_t>>();
+	fullSector->reserve(fullSectorSize);
+
+	/* sector gap after index pulse */
+	for (int i = 0; i < preHeaderGapFillSize; i++)
+		fullSector->push_back(GAP1_FILL_BYTE);
+
+	/* sector preamble */
+	for (int i = 0; i < preambleSize; i++)
+		fullSector->push_back(0);
+
+	Bytes sectorData;
+	if (sector->data.size() == encodedSectorSize)
+		sectorData = sector->data;
+	else {
+		ByteWriter writer(sectorData);
+		writer.write_8(0xFB);     /* sync character */
+		if (doubleDensity == true) {
+			writer.write_8(0xFB); /* Double-density has two sync characters */
+		}
+		writer += sector->data;
+		if (doubleDensity == true) {
+			writer.write_8(northstarChecksum(sectorData.slice(2)));
+		} else {
+			writer.write_8(northstarChecksum(sectorData.slice(1)));
+		}
+	}
+	for (uint8_t b : sectorData)
+		fullSector->push_back(b);
+
+	if (sector->logicalSector != 9) {
+		/* sector postamble */
+		for (int i = 0; i < gapFillSize; i++)
+			fullSector->push_back(GAP2_FILL_BYTE);
+
+		if (fullSector->size() != fullSectorSize)
+			Error() << "sector mismatched length (" << sector->data.size() << ") expected: " << fullSector->size() << " got " << fullSectorSize;
+	} else {
+		/* sector postamble */
+		for (int i = 0; i < gapFillSize; i++)
+			fullSector->push_back(GAP2_FILL_BYTE);
+	}
+
+	bool lastBit = false;
+
+	if (doubleDensity == true) {
+		encodeMfm(bits, cursor, fullSector, lastBit);
+	}
+	else {
+		encodeFm(bits, cursor, fullSector);
+	}
+}
+
+std::unique_ptr<Fluxmap> NorthstarEncoder::encode(
+	int physicalTrack, int physicalSide, const SectorSet& allSectors)
+{
+	int bitsPerRevolution = 100000;
+	double clockRateUs = 4.00;
+
+	if ((physicalTrack < 0) || (physicalTrack >= 35))
+		return std::unique_ptr<Fluxmap>();
+
+	const auto& sector = allSectors.get(physicalTrack, physicalSide, 0);
+
+	if (sector->data.size() == NORTHSTAR_PAYLOAD_SIZE_SD) {
+		bitsPerRevolution /= 2;		// FM
+	} else {
+		clockRateUs /= 2.00;
+	}
+
+	std::vector<bool> bits(bitsPerRevolution);
+	unsigned cursor = 0;
+
+	for (int sectorId = 0; sectorId < 10; sectorId++)
+	{
+		const auto& sectorData = allSectors.get(physicalTrack, physicalSide, sectorId);
+		write_sector(bits, cursor, sectorData);
+	}
+
+	if (cursor > bits.size())
+		Error() << "track data overrun";
+
+	std::unique_ptr<Fluxmap> fluxmap(new Fluxmap);
+	fluxmap->appendBits(bits, clockRateUs * 1e3);
+	return fluxmap;
+}

arch/northstar/northstar.h

@@ -0,0 +1,72 @@
+#ifndef NORTHSTAR_H
+#define NORTHSTAR_H
+
+/* Northstar floppies are 10-hard sectored disks with a sector format as follows:
+ *
+ * |----------------------------------|
+ * | SYNC Byte  | Payload  | Checksum |
+ * |------------+----------+----------|
+ * | 1 (0xFB)   | 256 (SD) |    1     |
+ * | 2 (0xFBFB) | 512 (DD) |          |
+ * |----------------------------------|
+ *
+ */
+
+#include "decoders/decoders.h"
+#include "encoders/encoders.h"
+
+#define NORTHSTAR_PREAMBLE_SIZE_SD		(16)
+#define NORTHSTAR_PREAMBLE_SIZE_DD		(32)
+#define NORTHSTAR_HEADER_SIZE_SD		(1)
+#define NORTHSTAR_HEADER_SIZE_DD		(2)
+#define NORTHSTAR_PAYLOAD_SIZE_SD		(256)
+#define NORTHSTAR_PAYLOAD_SIZE_DD		(512)
+#define NORTHSTAR_CHECKSUM_SIZE		(1)
+#define NORTHSTAR_ENCODED_SECTOR_SIZE_SD	(NORTHSTAR_HEADER_SIZE_SD + NORTHSTAR_PAYLOAD_SIZE_SD + NORTHSTAR_CHECKSUM_SIZE)
+#define NORTHSTAR_ENCODED_SECTOR_SIZE_DD	(NORTHSTAR_HEADER_SIZE_DD + NORTHSTAR_PAYLOAD_SIZE_DD + NORTHSTAR_CHECKSUM_SIZE)
+
+#define SECTOR_TYPE_MFM			(0)
+#define SECTOR_TYPE_FM				(1)
+
+class NorthstarEncoderProto;
+class NorthstarDecoderProto;
+
+class NorthstarDecoder : public AbstractDecoder
+{
+public:
+	NorthstarDecoder(const NorthstarDecoderProto& config):
+		_config(config)
+	{
+		_sectorType = SECTOR_TYPE_MFM;
+	}
+
+	virtual ~NorthstarDecoder() {}
+
+	RecordType advanceToNextRecord();
+	void decodeSectorRecord();
+	std::set<unsigned> requiredSectors(Track& track) const;
+
+private:
+	const NorthstarDecoderProto& _config;
+	uint8_t _sectorType;
+	uint8_t _hardSectorId;
+};
+
+class NorthstarEncoder : public AbstractEncoder
+{
+public:
+	NorthstarEncoder(const NorthstarEncoderProto& config):
+		_config(config)
+	{}
+
+	virtual ~NorthstarEncoder() {}
+	std::unique_ptr<Fluxmap> encode(int physicalTrack, int physicalSide, const SectorSet& allSectors);
+
+private:
+	const NorthstarEncoderProto& _config;
+};
+
+extern FlagGroup northstarEncoderFlags;
+extern uint8_t northstarChecksum(const Bytes& bytes);
+
+#endif /* NORTHSTAR */

arch/northstar/northstar.proto

@@ -0,0 +1,5 @@
+syntax = "proto2";
+
+message NorthstarDecoderProto {}
+message NorthstarEncoderProto {}
+

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;
+}
+

arch/tids990/encoder.cc

@@ -0,0 +1,130 @@
+#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 "arch/tids990/tids990.pb.h"
+#include <fmt/format.h>
+
+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 / _config.clock_rate_khz() / 2.0;
+	int bitsPerRevolution = (_config.track_length_ms() * 1000.0) / clockRateUs;
+	_bits.resize(bitsPerRevolution);
+	_cursor = 0;
+
+	uint8_t am1Unencoded = decodeUint16(_config.am1_byte());
+	uint8_t am2Unencoded = decodeUint16(_config.am2_byte());
+
+	writeBytes(_config.gap1_bytes(), 0x55);
+
+	bool first = true;
+	for (char sectorChar : _config.sector_skew())
+	{
+		int sectorId = charToInt(sectorChar);
+		if (!first)
+			writeBytes(_config.gap3_bytes(), 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(_config.sector_count());
+			bw.write_8(sectorData->logicalSector);
+			bw.write_be16(sectorData->data.size());
+			uint16_t crc = crc16(CCITT_POLY, header);
+			bw.write_be16(crc);
+
+			writeRawBits(_config.am1_byte(), 16);
+			writeBytes(header.slice(1));
+		}
+
+		writeBytes(_config.gap2_bytes(), 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(_config.am2_byte(), 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;
+}
+

arch/tids990/tids990.h

@@ -0,0 +1,54 @@
+#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 Tids990DecoderProto;
+class Tids990EncoderProto;
+
+class Tids990Decoder : public AbstractDecoder
+{
+public:
+	Tids990Decoder(const Tids990DecoderProto&) {}
+    virtual ~Tids990Decoder() {}
+
+    RecordType advanceToNextRecord();
+    void decodeSectorRecord();
+	void decodeDataRecord();
+};
+
+class Tids990Encoder : public AbstractEncoder
+{
+public:
+	Tids990Encoder(const Tids990EncoderProto& config):
+		_config(config)
+	{}
+	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:
+	const Tids990EncoderProto& _config;
+	std::vector<bool> _bits;
+	unsigned _cursor;
+	bool _lastBit;
+};
+
+extern FlagGroup tids990EncoderFlags;
+
+#endif
+
+

arch/tids990/tids990.proto

@@ -0,0 +1,26 @@
+syntax = "proto2";
+
+import "lib/common.proto";
+
+message Tids990DecoderProto {}
+message Tids990EncoderProto {
+	optional double track_length_ms = 1 [ default = 166,
+		(help) = "length of a track" ];
+	optional int32 sector_count = 2 [ default = 26,
+		(help) = "number of sectors per track" ];
+	optional double clock_rate_khz = 3 [ default = 500,
+		(help) = "clock rate of data to write" ];
+	optional int32 am1_byte = 4 [ default = 0x2244,
+		(help) = "16-bit RAW bit pattern to use for the AM1 ID byte" ];
+	optional int32 am2_byte = 5 [ default = 0x2245,
+		(help) = "16-bit RAW bit pattern to use for the AM2 ID byte" ];
+	optional int32 gap1_bytes = 6 [ default = 80,
+		(help) = "size of gap 1 (the post-index gap)" ];
+	optional int32 gap2_bytes = 7 [ default = 21,
+		(help) = "size of gap 2 (the post-ID gap)" ];
+	optional int32 gap3_bytes = 8 [ default = 51,
+		(help) = "size of gap 3 (the post-data or format gap)" ];
+	optional string sector_skew = 9 [ default = "1mhc72nid83oje94pkfa50lgb6",
+		(help) = "order to emit sectors" ];
+}
+

arch/victor9k/victor9k.h

@@ -8,10 +8,12 @@
 
 class Sector;
 class Fluxmap;
+class Victor9kDecoderProto;
 
 class Victor9kDecoder : public AbstractDecoder
 {
 public:
+	Victor9kDecoder(const Victor9kDecoderProto&) {}
     virtual ~Victor9kDecoder() {}
 
     RecordType advanceToNextRecord();

arch/victor9k/victor9k.proto

@@ -0,0 +1,4 @@
+syntax = "proto2";
+
+message Victor9kDecoderProto {}
+

arch/zilogmcz/zilogmcz.h

@@ -3,10 +3,12 @@
 
 class Sector;
 class Fluxmap;
+class ZilogMczDecoderProto;
 
 class ZilogMczDecoder : public AbstractDecoder
 {
 public:
+	ZilogMczDecoder(const ZilogMczDecoderProto&) {}
     virtual ~ZilogMczDecoder() {}
 
     RecordType advanceToNextRecord();

arch/zilogmcz/zilogmcz.proto

@@ -0,0 +1,4 @@
+syntax = "proto2";
+
+message ZilogMczDecoderProto {}
+

dep/agg/AUTHORS

@@ -0,0 +1,2 @@
+Anti-Grain Geometry - Version 2.4
+Copyright (C) 2002-2005 Maxim Shemanarev (McSeem) 

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.
+
+---------------------------------

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.
+

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.
+

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

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
+
+

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

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

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

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
+

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

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

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

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

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

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

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

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
+

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
+

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

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

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

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

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

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

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

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

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
+

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

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
+

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

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
+

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

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

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

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

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

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
+
+

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
+