fluxengine/dep/agg/include/agg_pixfmt_rgb_packed.h

//----------------------------------------------------------------------------
// Anti-Grain Geometry - Version 2.4
// Copyright (C) 2002-2005 Maxim Shemanarev (http://www.antigrain.com)
//
// Permission to copy, use, modify, sell and distribute this software
// is granted provided this copyright notice appears in all copies.
// This software is provided "as is" without express or implied
// warranty, and with no claim as to its suitability for any purpose.
//
//----------------------------------------------------------------------------
// Contact: mcseem@antigrain.com
//          mcseemagg@yahoo.com
//          http://www.antigrain.com
//----------------------------------------------------------------------------
//
// Adaptation for high precision colors has been sponsored by
// Liberty Technology Systems, Inc., visit http://lib-sys.com
//
// Liberty Technology Systems, Inc. is the provider of
// PostScript and PDF technology for software developers.
//
//----------------------------------------------------------------------------

#ifndef AGG_PIXFMT_RGB_PACKED_INCLUDED
#define AGG_PIXFMT_RGB_PACKED_INCLUDED

#include <cstring>
#include "agg_basics.h"
#include "agg_color_rgba.h"
#include "agg_rendering_buffer.h"

namespace agg
{
    //=========================================================blender_rgb555
    struct blender_rgb555
    {
        typedef rgba8 color_type;
        typedef color_type::value_type value_type;
        typedef color_type::calc_type calc_type;
        typedef int16u pixel_type;

        static AGG_INLINE void blend_pix(pixel_type* p,
            unsigned cr,
            unsigned cg,
            unsigned cb,
            unsigned alpha,
            unsigned)
        {
            pixel_type rgb = *p;
            calc_type r = (rgb >> 7) & 0xF8;
            calc_type g = (rgb >> 2) & 0xF8;
            calc_type b = (rgb << 3) & 0xF8;
            *p = (pixel_type)(((((cr - r) * alpha + (r << 8)) >> 1) & 0x7C00) |
                              ((((cg - g) * alpha + (g << 8)) >> 6) & 0x03E0) |
                              (((cb - b) * alpha + (b << 8)) >> 11) | 0x8000);
        }

        static AGG_INLINE pixel_type make_pix(
            unsigned r, unsigned g, unsigned b)
        {
            return (pixel_type)(((r & 0xF8) << 7) | ((g & 0xF8) << 2) |
                                (b >> 3) | 0x8000);
        }

        static AGG_INLINE color_type make_color(pixel_type p)
        {
            return color_type(
                (p >> 7) & 0xF8, (p >> 2) & 0xF8, (p << 3) & 0xF8);
        }
    };

    //=====================================================blender_rgb555_pre
    struct blender_rgb555_pre
    {
        typedef rgba8 color_type;
        typedef color_type::value_type value_type;
        typedef color_type::calc_type calc_type;
        typedef int16u pixel_type;

        static AGG_INLINE void blend_pix(pixel_type* p,
            unsigned cr,
            unsigned cg,
            unsigned cb,
            unsigned alpha,
            unsigned cover)
        {
            alpha = color_type::base_mask - alpha;
            pixel_type rgb = *p;
            calc_type r = (rgb >> 7) & 0xF8;
            calc_type g = (rgb >> 2) & 0xF8;
            calc_type b = (rgb << 3) & 0xF8;
            *p = (pixel_type)((((r * alpha + cr * cover) >> 1) & 0x7C00) |
                              (((g * alpha + cg * cover) >> 6) & 0x03E0) |
                              ((b * alpha + cb * cover) >> 11) | 0x8000);
        }

        static AGG_INLINE pixel_type make_pix(
            unsigned r, unsigned g, unsigned b)
        {
            return (pixel_type)(((r & 0xF8) << 7) | ((g & 0xF8) << 2) |
                                (b >> 3) | 0x8000);
        }

        static AGG_INLINE color_type make_color(pixel_type p)
        {
            return color_type(
                (p >> 7) & 0xF8, (p >> 2) & 0xF8, (p << 3) & 0xF8);
        }
    };

    //=====================================================blender_rgb555_gamma
    template <class Gamma>
    class blender_rgb555_gamma
    {
    public:
        typedef rgba8 color_type;
        typedef color_type::value_type value_type;
        typedef color_type::calc_type calc_type;
        typedef int16u pixel_type;
        typedef Gamma gamma_type;

        blender_rgb555_gamma(): m_gamma(0) {}
        void gamma(const gamma_type& g)
        {
            m_gamma = &g;
        }

        AGG_INLINE void blend_pix(pixel_type* p,
            unsigned cr,
            unsigned cg,
            unsigned cb,
            unsigned alpha,
            unsigned)
        {
            pixel_type rgb = *p;
            calc_type r = m_gamma->dir((rgb >> 7) & 0xF8);
            calc_type g = m_gamma->dir((rgb >> 2) & 0xF8);
            calc_type b = m_gamma->dir((rgb << 3) & 0xF8);
            *p = (pixel_type)(((m_gamma->inv(((m_gamma->dir(cr) - r) * alpha +
                                                 (r << 8)) >>
                                             8)
                                   << 7) &
                                  0x7C00) |
                              ((m_gamma->inv(((m_gamma->dir(cg) - g) * alpha +
                                                 (g << 8)) >>
                                             8)
                                   << 2) &
                                  0x03E0) |
                              (m_gamma->inv(((m_gamma->dir(cb) - b) * alpha +
                                                (b << 8)) >>
                                            8) >>
                                  3) |
                              0x8000);
        }

        static AGG_INLINE pixel_type make_pix(
            unsigned r, unsigned g, unsigned b)
        {
            return (pixel_type)(((r & 0xF8) << 7) | ((g & 0xF8) << 2) |
                                (b >> 3) | 0x8000);
        }

        static AGG_INLINE color_type make_color(pixel_type p)
        {
            return color_type(
                (p >> 7) & 0xF8, (p >> 2) & 0xF8, (p << 3) & 0xF8);
        }

    private:
        const Gamma* m_gamma;
    };

    //=========================================================blender_rgb565
    struct blender_rgb565
    {
        typedef rgba8 color_type;
        typedef color_type::value_type value_type;
        typedef color_type::calc_type calc_type;
        typedef int16u pixel_type;

        static AGG_INLINE void blend_pix(pixel_type* p,
            unsigned cr,
            unsigned cg,
            unsigned cb,
            unsigned alpha,
            unsigned)
        {
            pixel_type rgb = *p;
            calc_type r = (rgb >> 8) & 0xF8;
            calc_type g = (rgb >> 3) & 0xFC;
            calc_type b = (rgb << 3) & 0xF8;
            *p = (pixel_type)(((((cr - r) * alpha + (r << 8))) & 0xF800) |
                              ((((cg - g) * alpha + (g << 8)) >> 5) & 0x07E0) |
                              (((cb - b) * alpha + (b << 8)) >> 11));
        }

        static AGG_INLINE pixel_type make_pix(
            unsigned r, unsigned g, unsigned b)
        {
            return (
                pixel_type)(((r & 0xF8) << 8) | ((g & 0xFC) << 3) | (b >> 3));
        }

        static AGG_INLINE color_type make_color(pixel_type p)
        {
            return color_type(
                (p >> 8) & 0xF8, (p >> 3) & 0xFC, (p << 3) & 0xF8);
        }
    };

    //=====================================================blender_rgb565_pre
    struct blender_rgb565_pre
    {
        typedef rgba8 color_type;
        typedef color_type::value_type value_type;
        typedef color_type::calc_type calc_type;
        typedef int16u pixel_type;

        static AGG_INLINE void blend_pix(pixel_type* p,
            unsigned cr,
            unsigned cg,
            unsigned cb,
            unsigned alpha,
            unsigned cover)
        {
            alpha = color_type::base_mask - alpha;
            pixel_type rgb = *p;
            calc_type r = (rgb >> 8) & 0xF8;
            calc_type g = (rgb >> 3) & 0xFC;
            calc_type b = (rgb << 3) & 0xF8;
            *p = (pixel_type)((((r * alpha + cr * cover)) & 0xF800) |
                              (((g * alpha + cg * cover) >> 5) & 0x07E0) |
                              ((b * alpha + cb * cover) >> 11));
        }

        static AGG_INLINE pixel_type make_pix(
            unsigned r, unsigned g, unsigned b)
        {
            return (
                pixel_type)(((r & 0xF8) << 8) | ((g & 0xFC) << 3) | (b >> 3));
        }

        static AGG_INLINE color_type make_color(pixel_type p)
        {
            return color_type(
                (p >> 8) & 0xF8, (p >> 3) & 0xFC, (p << 3) & 0xF8);
        }
    };

    //=====================================================blender_rgb565_gamma
    template <class Gamma>
    class blender_rgb565_gamma
    {
    public:
        typedef rgba8 color_type;
        typedef color_type::value_type value_type;
        typedef color_type::calc_type calc_type;
        typedef int16u pixel_type;
        typedef Gamma gamma_type;

        blender_rgb565_gamma(): m_gamma(0) {}
        void gamma(const gamma_type& g)
        {
            m_gamma = &g;
        }

        AGG_INLINE void blend_pix(pixel_type* p,
            unsigned cr,
            unsigned cg,
            unsigned cb,
            unsigned alpha,
            unsigned)
        {
            pixel_type rgb = *p;
            calc_type r = m_gamma->dir((rgb >> 8) & 0xF8);
            calc_type g = m_gamma->dir((rgb >> 3) & 0xFC);
            calc_type b = m_gamma->dir((rgb << 3) & 0xF8);
            *p = (pixel_type)(((m_gamma->inv(((m_gamma->dir(cr) - r) * alpha +
                                                 (r << 8)) >>
                                             8)
                                   << 8) &
                                  0xF800) |
                              ((m_gamma->inv(((m_gamma->dir(cg) - g) * alpha +
                                                 (g << 8)) >>
                                             8)
                                   << 3) &
                                  0x07E0) |
                              (m_gamma->inv(((m_gamma->dir(cb) - b) * alpha +
                                                (b << 8)) >>
                                            8) >>
                                  3));
        }

        static AGG_INLINE pixel_type make_pix(
            unsigned r, unsigned g, unsigned b)
        {
            return (
                pixel_type)(((r & 0xF8) << 8) | ((g & 0xFC) << 3) | (b >> 3));
        }

        static AGG_INLINE color_type make_color(pixel_type p)
        {
            return color_type(
                (p >> 8) & 0xF8, (p >> 3) & 0xFC, (p << 3) & 0xF8);
        }

    private:
        const Gamma* m_gamma;
    };

    //=====================================================blender_rgbAAA
    struct blender_rgbAAA
    {
        typedef rgba16 color_type;
        typedef color_type::value_type value_type;
        typedef color_type::calc_type calc_type;
        typedef int32u pixel_type;

        static AGG_INLINE void blend_pix(pixel_type* p,
            unsigned cr,
            unsigned cg,
            unsigned cb,
            unsigned alpha,
            unsigned)
        {
            pixel_type rgb = *p;
            calc_type r = (rgb >> 14) & 0xFFC0;
            calc_type g = (rgb >> 4) & 0xFFC0;
            calc_type b = (rgb << 6) & 0xFFC0;
            *p = (pixel_type)(((((cr - r) * alpha + (r << 16)) >> 2) &
                                  0x3FF00000) |
                              ((((cg - g) * alpha + (g << 16)) >> 12) &
                                  0x000FFC00) |
                              (((cb - b) * alpha + (b << 16)) >> 22) |
                              0xC0000000);
        }

        static AGG_INLINE pixel_type make_pix(
            unsigned r, unsigned g, unsigned b)
        {
            return (pixel_type)(((r & 0xFFC0) << 14) | ((g & 0xFFC0) << 4) |
                                (b >> 6) | 0xC0000000);
        }

        static AGG_INLINE color_type make_color(pixel_type p)
        {
            return color_type(
                (p >> 14) & 0xFFC0, (p >> 4) & 0xFFC0, (p << 6) & 0xFFC0);
        }
    };

    //==================================================blender_rgbAAA_pre
    struct blender_rgbAAA_pre
    {
        typedef rgba16 color_type;
        typedef color_type::value_type value_type;
        typedef color_type::calc_type calc_type;
        typedef int32u pixel_type;

        static AGG_INLINE void blend_pix(pixel_type* p,
            unsigned cr,
            unsigned cg,
            unsigned cb,
            unsigned alpha,
            unsigned cover)
        {
            alpha = color_type::base_mask - alpha;
            cover = (cover + 1) << (color_type::base_shift - 8);
            pixel_type rgb = *p;
            calc_type r = (rgb >> 14) & 0xFFC0;
            calc_type g = (rgb >> 4) & 0xFFC0;
            calc_type b = (rgb << 6) & 0xFFC0;
            *p = (pixel_type)((((r * alpha + cr * cover) >> 2) & 0x3FF00000) |
                              (((g * alpha + cg * cover) >> 12) & 0x000FFC00) |
                              ((b * alpha + cb * cover) >> 22) | 0xC0000000);
        }

        static AGG_INLINE pixel_type make_pix(
            unsigned r, unsigned g, unsigned b)
        {
            return (pixel_type)(((r & 0xFFC0) << 14) | ((g & 0xFFC0) << 4) |
                                (b >> 6) | 0xC0000000);
        }

        static AGG_INLINE color_type make_color(pixel_type p)
        {
            return color_type(
                (p >> 14) & 0xFFC0, (p >> 4) & 0xFFC0, (p << 6) & 0xFFC0);
        }
    };

    //=================================================blender_rgbAAA_gamma
    template <class Gamma>
    class blender_rgbAAA_gamma
    {
    public:
        typedef rgba16 color_type;
        typedef color_type::value_type value_type;
        typedef color_type::calc_type calc_type;
        typedef int32u pixel_type;
        typedef Gamma gamma_type;

        blender_rgbAAA_gamma(): m_gamma(0) {}
        void gamma(const gamma_type& g)
        {
            m_gamma = &g;
        }

        AGG_INLINE void blend_pix(pixel_type* p,
            unsigned cr,
            unsigned cg,
            unsigned cb,
            unsigned alpha,
            unsigned)
        {
            pixel_type rgb = *p;
            calc_type r = m_gamma->dir((rgb >> 14) & 0xFFC0);
            calc_type g = m_gamma->dir((rgb >> 4) & 0xFFC0);
            calc_type b = m_gamma->dir((rgb << 6) & 0xFFC0);
            *p = (pixel_type)(((m_gamma->inv(((m_gamma->dir(cr) - r) * alpha +
                                                 (r << 16)) >>
                                             16)
                                   << 14) &
                                  0x3FF00000) |
                              ((m_gamma->inv(((m_gamma->dir(cg) - g) * alpha +
                                                 (g << 16)) >>
                                             16)
                                   << 4) &
                                  0x000FFC00) |
                              (m_gamma->inv(((m_gamma->dir(cb) - b) * alpha +
                                                (b << 16)) >>
                                            16) >>
                                  6) |
                              0xC0000000);
        }

        static AGG_INLINE pixel_type make_pix(
            unsigned r, unsigned g, unsigned b)
        {
            return (pixel_type)(((r & 0xFFC0) << 14) | ((g & 0xFFC0) << 4) |
                                (b >> 6) | 0xC0000000);
        }

        static AGG_INLINE color_type make_color(pixel_type p)
        {
            return color_type(
                (p >> 14) & 0xFFC0, (p >> 4) & 0xFFC0, (p << 6) & 0xFFC0);
        }

    private:
        const Gamma* m_gamma;
    };

    //=====================================================blender_bgrAAA
    struct blender_bgrAAA
    {
        typedef rgba16 color_type;
        typedef color_type::value_type value_type;
        typedef color_type::calc_type calc_type;
        typedef int32u pixel_type;

        static AGG_INLINE void blend_pix(pixel_type* p,
            unsigned cr,
            unsigned cg,
            unsigned cb,
            unsigned alpha,
            unsigned)
        {
            pixel_type bgr = *p;
            calc_type b = (bgr >> 14) & 0xFFC0;
            calc_type g = (bgr >> 4) & 0xFFC0;
            calc_type r = (bgr << 6) & 0xFFC0;
            *p = (pixel_type)(((((cb - b) * alpha + (b << 16)) >> 2) &
                                  0x3FF00000) |
                              ((((cg - g) * alpha + (g << 16)) >> 12) &
                                  0x000FFC00) |
                              (((cr - r) * alpha + (r << 16)) >> 22) |
                              0xC0000000);
        }

        static AGG_INLINE pixel_type make_pix(
            unsigned r, unsigned g, unsigned b)
        {
            return (pixel_type)(((b & 0xFFC0) << 14) | ((g & 0xFFC0) << 4) |
                                (r >> 6) | 0xC0000000);
        }

        static AGG_INLINE color_type make_color(pixel_type p)
        {
            return color_type(
                (p << 6) & 0xFFC0, (p >> 4) & 0xFFC0, (p >> 14) & 0xFFC0);
        }
    };

    //=================================================blender_bgrAAA_pre
    struct blender_bgrAAA_pre
    {
        typedef rgba16 color_type;
        typedef color_type::value_type value_type;
        typedef color_type::calc_type calc_type;
        typedef int32u pixel_type;

        static AGG_INLINE void blend_pix(pixel_type* p,
            unsigned cr,
            unsigned cg,
            unsigned cb,
            unsigned alpha,
            unsigned cover)
        {
            alpha = color_type::base_mask - alpha;
            cover = (cover + 1) << (color_type::base_shift - 8);
            pixel_type bgr = *p;
            calc_type b = (bgr >> 14) & 0xFFC0;
            calc_type g = (bgr >> 4) & 0xFFC0;
            calc_type r = (bgr << 6) & 0xFFC0;
            *p = (pixel_type)((((b * alpha + cb * cover) >> 2) & 0x3FF00000) |
                              (((g * alpha + cg * cover) >> 12) & 0x000FFC00) |
                              ((r * alpha + cr * cover) >> 22) | 0xC0000000);
        }

        static AGG_INLINE pixel_type make_pix(
            unsigned r, unsigned g, unsigned b)
        {
            return (pixel_type)(((b & 0xFFC0) << 14) | ((g & 0xFFC0) << 4) |
                                (r >> 6) | 0xC0000000);
        }

        static AGG_INLINE color_type make_color(pixel_type p)
        {
            return color_type(
                (p << 6) & 0xFFC0, (p >> 4) & 0xFFC0, (p >> 14) & 0xFFC0);
        }
    };

    //=================================================blender_bgrAAA_gamma
    template <class Gamma>
    class blender_bgrAAA_gamma
    {
    public:
        typedef rgba16 color_type;
        typedef color_type::value_type value_type;
        typedef color_type::calc_type calc_type;
        typedef int32u pixel_type;
        typedef Gamma gamma_type;

        blender_bgrAAA_gamma(): m_gamma(0) {}
        void gamma(const gamma_type& g)
        {
            m_gamma = &g;
        }

        AGG_INLINE void blend_pix(pixel_type* p,
            unsigned cr,
            unsigned cg,
            unsigned cb,
            unsigned alpha,
            unsigned)
        {
            pixel_type bgr = *p;
            calc_type b = m_gamma->dir((bgr >> 14) & 0xFFC0);
            calc_type g = m_gamma->dir((bgr >> 4) & 0xFFC0);
            calc_type r = m_gamma->dir((bgr << 6) & 0xFFC0);
            *p = (pixel_type)(((m_gamma->inv(((m_gamma->dir(cb) - b) * alpha +
                                                 (b << 16)) >>
                                             16)
                                   << 14) &
                                  0x3FF00000) |
                              ((m_gamma->inv(((m_gamma->dir(cg) - g) * alpha +
                                                 (g << 16)) >>
                                             16)
                                   << 4) &
                                  0x000FFC00) |
                              (m_gamma->inv(((m_gamma->dir(cr) - r) * alpha +
                                                (r << 16)) >>
                                            16) >>
                                  6) |
                              0xC0000000);
        }

        static AGG_INLINE pixel_type make_pix(
            unsigned r, unsigned g, unsigned b)
        {
            return (pixel_type)(((b & 0xFFC0) << 14) | ((g & 0xFFC0) << 4) |
                                (r >> 6) | 0xC0000000);
        }

        static AGG_INLINE color_type make_color(pixel_type p)
        {
            return color_type(
                (p << 6) & 0xFFC0, (p >> 4) & 0xFFC0, (p >> 14) & 0xFFC0);
        }

    private:
        const Gamma* m_gamma;
    };

    //=====================================================blender_rgbBBA
    struct blender_rgbBBA
    {
        typedef rgba16 color_type;
        typedef color_type::value_type value_type;
        typedef color_type::calc_type calc_type;
        typedef int32u pixel_type;

        static AGG_INLINE void blend_pix(pixel_type* p,
            unsigned cr,
            unsigned cg,
            unsigned cb,
            unsigned alpha,
            unsigned)
        {
            pixel_type rgb = *p;
            calc_type r = (rgb >> 16) & 0xFFE0;
            calc_type g = (rgb >> 5) & 0xFFE0;
            calc_type b = (rgb << 6) & 0xFFC0;
            *p = (pixel_type)(((((cr - r) * alpha + (r << 16))) & 0xFFE00000) |
                              ((((cg - g) * alpha + (g << 16)) >> 11) &
                                  0x001FFC00) |
                              (((cb - b) * alpha + (b << 16)) >> 22));
        }

        static AGG_INLINE pixel_type make_pix(
            unsigned r, unsigned g, unsigned b)
        {
            return (pixel_type)(((r & 0xFFE0) << 16) | ((g & 0xFFE0) << 5) |
                                (b >> 6));
        }

        static AGG_INLINE color_type make_color(pixel_type p)
        {
            return color_type(
                (p >> 16) & 0xFFE0, (p >> 5) & 0xFFE0, (p << 6) & 0xFFC0);
        }
    };

    //=================================================blender_rgbBBA_pre
    struct blender_rgbBBA_pre
    {
        typedef rgba16 color_type;
        typedef color_type::value_type value_type;
        typedef color_type::calc_type calc_type;
        typedef int32u pixel_type;

        static AGG_INLINE void blend_pix(pixel_type* p,
            unsigned cr,
            unsigned cg,
            unsigned cb,
            unsigned alpha,
            unsigned cover)
        {
            alpha = color_type::base_mask - alpha;
            cover = (cover + 1) << (color_type::base_shift - 8);
            pixel_type rgb = *p;
            calc_type r = (rgb >> 16) & 0xFFE0;
            calc_type g = (rgb >> 5) & 0xFFE0;
            calc_type b = (rgb << 6) & 0xFFC0;
            *p = (pixel_type)((((r * alpha + cr * cover)) & 0xFFE00000) |
                              (((g * alpha + cg * cover) >> 11) & 0x001FFC00) |
                              ((b * alpha + cb * cover) >> 22));
        }

        static AGG_INLINE pixel_type make_pix(
            unsigned r, unsigned g, unsigned b)
        {
            return (pixel_type)(((r & 0xFFE0) << 16) | ((g & 0xFFE0) << 5) |
                                (b >> 6));
        }

        static AGG_INLINE color_type make_color(pixel_type p)
        {
            return color_type(
                (p >> 16) & 0xFFE0, (p >> 5) & 0xFFE0, (p << 6) & 0xFFC0);
        }
    };

    //=================================================blender_rgbBBA_gamma
    template <class Gamma>
    class blender_rgbBBA_gamma
    {
    public:
        typedef rgba16 color_type;
        typedef color_type::value_type value_type;
        typedef color_type::calc_type calc_type;
        typedef int32u pixel_type;
        typedef Gamma gamma_type;

        blender_rgbBBA_gamma(): m_gamma(0) {}
        void gamma(const gamma_type& g)
        {
            m_gamma = &g;
        }

        AGG_INLINE void blend_pix(pixel_type* p,
            unsigned cr,
            unsigned cg,
            unsigned cb,
            unsigned alpha,
            unsigned)
        {
            pixel_type rgb = *p;
            calc_type r = m_gamma->dir((rgb >> 16) & 0xFFE0);
            calc_type g = m_gamma->dir((rgb >> 5) & 0xFFE0);
            calc_type b = m_gamma->dir((rgb << 6) & 0xFFC0);
            *p = (pixel_type)(((m_gamma->inv(((m_gamma->dir(cr) - r) * alpha +
                                                 (r << 16)) >>
                                             16)
                                   << 16) &
                                  0xFFE00000) |
                              ((m_gamma->inv(((m_gamma->dir(cg) - g) * alpha +
                                                 (g << 16)) >>
                                             16)
                                   << 5) &
                                  0x001FFC00) |
                              (m_gamma->inv(((m_gamma->dir(cb) - b) * alpha +
                                                (b << 16)) >>
                                            16) >>
                                  6));
        }

        static AGG_INLINE pixel_type make_pix(
            unsigned r, unsigned g, unsigned b)
        {
            return (pixel_type)(((r & 0xFFE0) << 16) | ((g & 0xFFE0) << 5) |
                                (b >> 6));
        }

        static AGG_INLINE color_type make_color(pixel_type p)
        {
            return color_type(
                (p >> 16) & 0xFFE0, (p >> 5) & 0xFFE0, (p << 6) & 0xFFC0);
        }

    private:
        const Gamma* m_gamma;
    };

    //=====================================================blender_bgrABB
    struct blender_bgrABB
    {
        typedef rgba16 color_type;
        typedef color_type::value_type value_type;
        typedef color_type::calc_type calc_type;
        typedef int32u pixel_type;

        static AGG_INLINE void blend_pix(pixel_type* p,
            unsigned cr,
            unsigned cg,
            unsigned cb,
            unsigned alpha,
            unsigned)
        {
            pixel_type bgr = *p;
            calc_type b = (bgr >> 16) & 0xFFC0;
            calc_type g = (bgr >> 6) & 0xFFE0;
            calc_type r = (bgr << 5) & 0xFFE0;
            *p = (pixel_type)(((((cb - b) * alpha + (b << 16))) & 0xFFC00000) |
                              ((((cg - g) * alpha + (g << 16)) >> 10) &
                                  0x003FF800) |
                              (((cr - r) * alpha + (r << 16)) >> 21));
        }

        static AGG_INLINE pixel_type make_pix(
            unsigned r, unsigned g, unsigned b)
        {
            return (pixel_type)(((b & 0xFFC0) << 16) | ((g & 0xFFE0) << 6) |
                                (r >> 5));
        }

        static AGG_INLINE color_type make_color(pixel_type p)
        {
            return color_type(
                (p << 5) & 0xFFE0, (p >> 6) & 0xFFE0, (p >> 16) & 0xFFC0);
        }
    };

    //=================================================blender_bgrABB_pre
    struct blender_bgrABB_pre
    {
        typedef rgba16 color_type;
        typedef color_type::value_type value_type;
        typedef color_type::calc_type calc_type;
        typedef int32u pixel_type;

        static AGG_INLINE void blend_pix(pixel_type* p,
            unsigned cr,
            unsigned cg,
            unsigned cb,
            unsigned alpha,
            unsigned cover)
        {
            alpha = color_type::base_mask - alpha;
            cover = (cover + 1) << (color_type::base_shift - 8);
            pixel_type bgr = *p;
            calc_type b = (bgr >> 16) & 0xFFC0;
            calc_type g = (bgr >> 6) & 0xFFE0;
            calc_type r = (bgr << 5) & 0xFFE0;
            *p = (pixel_type)((((b * alpha + cb * cover)) & 0xFFC00000) |
                              (((g * alpha + cg * cover) >> 10) & 0x003FF800) |
                              ((r * alpha + cr * cover) >> 21));
        }

        static AGG_INLINE pixel_type make_pix(
            unsigned r, unsigned g, unsigned b)
        {
            return (pixel_type)(((b & 0xFFC0) << 16) | ((g & 0xFFE0) << 6) |
                                (r >> 5));
        }

        static AGG_INLINE color_type make_color(pixel_type p)
        {
            return color_type(
                (p << 5) & 0xFFE0, (p >> 6) & 0xFFE0, (p >> 16) & 0xFFC0);
        }
    };

    //=================================================blender_bgrABB_gamma
    template <class Gamma>
    class blender_bgrABB_gamma
    {
    public:
        typedef rgba16 color_type;
        typedef color_type::value_type value_type;
        typedef color_type::calc_type calc_type;
        typedef int32u pixel_type;
        typedef Gamma gamma_type;

        blender_bgrABB_gamma(): m_gamma(0) {}
        void gamma(const gamma_type& g)
        {
            m_gamma = &g;
        }

        AGG_INLINE void blend_pix(pixel_type* p,
            unsigned cr,
            unsigned cg,
            unsigned cb,
            unsigned alpha,
            unsigned)
        {
            pixel_type bgr = *p;
            calc_type b = m_gamma->dir((bgr >> 16) & 0xFFC0);
            calc_type g = m_gamma->dir((bgr >> 6) & 0xFFE0);
            calc_type r = m_gamma->dir((bgr << 5) & 0xFFE0);
            *p = (pixel_type)(((m_gamma->inv(((m_gamma->dir(cb) - b) * alpha +
                                                 (b << 16)) >>
                                             16)
                                   << 16) &
                                  0xFFC00000) |
                              ((m_gamma->inv(((m_gamma->dir(cg) - g) * alpha +
                                                 (g << 16)) >>
                                             16)
                                   << 6) &
                                  0x003FF800) |
                              (m_gamma->inv(((m_gamma->dir(cr) - r) * alpha +
                                                (r << 16)) >>
                                            16) >>
                                  5));
        }

        static AGG_INLINE pixel_type make_pix(
            unsigned r, unsigned g, unsigned b)
        {
            return (pixel_type)(((b & 0xFFC0) << 16) | ((g & 0xFFE0) << 6) |
                                (r >> 5));
        }

        static AGG_INLINE color_type make_color(pixel_type p)
        {
            return color_type(
                (p << 5) & 0xFFE0, (p >> 6) & 0xFFE0, (p >> 16) & 0xFFC0);
        }

    private:
        const Gamma* m_gamma;
    };

    //===========================================pixfmt_alpha_blend_rgb_packed
    template <class Blender, class RenBuf>
    class pixfmt_alpha_blend_rgb_packed
    {
    public:
        typedef RenBuf rbuf_type;
        typedef typename rbuf_type::row_data row_data;
        typedef Blender blender_type;
        typedef typename blender_type::color_type color_type;
        typedef typename blender_type::pixel_type pixel_type;
        typedef int order_type; // A fake one
        typedef typename color_type::value_type value_type;
        typedef typename color_type::calc_type calc_type;
        enum base_scale_e
        {
            base_shift = color_type::base_shift,
            base_scale = color_type::base_scale,
            base_mask = color_type::base_mask,
            pix_width = sizeof(pixel_type),
        };

    private:
        //--------------------------------------------------------------------
        AGG_INLINE void copy_or_blend_pix(
            pixel_type* p, const color_type& c, unsigned cover)
        {
            if (c.a)
            {
                calc_type alpha = (calc_type(c.a) * (cover + 1)) >> 8;
                if (alpha == base_mask)
                {
                    *p = m_blender.make_pix(c.r, c.g, c.b);
                }
                else
                {
                    m_blender.blend_pix(p, c.r, c.g, c.b, alpha, cover);
                }
            }
        }

    public:
        //--------------------------------------------------------------------
        explicit pixfmt_alpha_blend_rgb_packed(rbuf_type& rb): m_rbuf(&rb) {}
        void attach(rbuf_type& rb)
        {
            m_rbuf = &rb;
        }

        //--------------------------------------------------------------------
        template <class PixFmt>
        bool attach(PixFmt& pixf, int x1, int y1, int x2, int y2)
        {
            rect_i r(x1, y1, x2, y2);
            if (r.clip(rect_i(0, 0, pixf.width() - 1, pixf.height() - 1)))
            {
                int stride = pixf.stride();
                m_rbuf->attach(pixf.pix_ptr(r.x1, stride < 0 ? r.y2 : r.y1),
                    (r.x2 - r.x1) + 1,
                    (r.y2 - r.y1) + 1,
                    stride);
                return true;
            }
            return false;
        }

        Blender& blender()
        {
            return m_blender;
        }

        //--------------------------------------------------------------------
        AGG_INLINE unsigned width() const
        {
            return m_rbuf->width();
        }
        AGG_INLINE unsigned height() const
        {
            return m_rbuf->height();
        }
        AGG_INLINE int stride() const
        {
            return m_rbuf->stride();
        }

        //--------------------------------------------------------------------
        AGG_INLINE int8u* row_ptr(int y)
        {
            return m_rbuf->row_ptr(y);
        }
        AGG_INLINE const int8u* row_ptr(int y) const
        {
            return m_rbuf->row_ptr(y);
        }
        AGG_INLINE row_data row(int y) const
        {
            return m_rbuf->row(y);
        }

        //--------------------------------------------------------------------
        AGG_INLINE int8u* pix_ptr(int x, int y)
        {
            return m_rbuf->row_ptr(y) + x * pix_width;
        }

        AGG_INLINE const int8u* pix_ptr(int x, int y) const
        {
            return m_rbuf->row_ptr(y) + x * pix_width;
        }

        //--------------------------------------------------------------------
        AGG_INLINE void make_pix(int8u* p, const color_type& c)
        {
            *(pixel_type*)p = m_blender.make_pix(c.r, c.g, c.b);
        }

        //--------------------------------------------------------------------
        AGG_INLINE color_type pixel(int x, int y) const
        {
            return m_blender.make_color(((pixel_type*)m_rbuf->row_ptr(y))[x]);
        }

        //--------------------------------------------------------------------
        AGG_INLINE void copy_pixel(int x, int y, const color_type& c)
        {
            ((pixel_type*)m_rbuf->row_ptr(x, y, 1))[x] =
                m_blender.make_pix(c.r, c.g, c.b);
        }

        //--------------------------------------------------------------------
        AGG_INLINE void blend_pixel(
            int x, int y, const color_type& c, int8u cover)
        {
            copy_or_blend_pix(
                (pixel_type*)m_rbuf->row_ptr(x, y, 1) + x, c, cover);
        }

        //--------------------------------------------------------------------
        AGG_INLINE void copy_hline(
            int x, int y, unsigned len, const color_type& c)
        {
            pixel_type* p = (pixel_type*)m_rbuf->row_ptr(x, y, len) + x;
            pixel_type v = m_blender.make_pix(c.r, c.g, c.b);
            do
            {
                *p++ = v;
            } while (--len);
        }

        //--------------------------------------------------------------------
        AGG_INLINE void copy_vline(
            int x, int y, unsigned len, const color_type& c)
        {
            pixel_type v = m_blender.make_pix(c.r, c.g, c.b);
            do
            {
                pixel_type* p = (pixel_type*)m_rbuf->row_ptr(x, y++, 1) + x;
                *p = v;
            } while (--len);
        }

        //--------------------------------------------------------------------
        void blend_hline(
            int x, int y, unsigned len, const color_type& c, int8u cover)
        {
            if (c.a)
            {
                pixel_type* p = (pixel_type*)m_rbuf->row_ptr(x, y, len) + x;
                calc_type alpha = (calc_type(c.a) * (cover + 1)) >> 8;
                if (alpha == base_mask)
                {
                    pixel_type v = m_blender.make_pix(c.r, c.g, c.b);
                    do
                    {
                        *p++ = v;
                    } while (--len);
                }
                else
                {
                    do
                    {
                        m_blender.blend_pix(p, c.r, c.g, c.b, alpha, cover);
                        ++p;
                    } while (--len);
                }
            }
        }

        //--------------------------------------------------------------------
        void blend_vline(
            int x, int y, unsigned len, const color_type& c, int8u cover)
        {
            if (c.a)
            {
                calc_type alpha = (calc_type(c.a) * (cover + 1)) >> 8;
                if (alpha == base_mask)
                {
                    pixel_type v = m_blender.make_pix(c.r, c.g, c.b);
                    do
                    {
                        ((pixel_type*)m_rbuf->row_ptr(x, y++, 1))[x] = v;
                    } while (--len);
                }
                else
                {
                    do
                    {
                        m_blender.blend_pix(
                            (pixel_type*)m_rbuf->row_ptr(x, y++, 1),
                            c.r,
                            c.g,
                            c.b,
                            alpha,
                            cover);
                    } while (--len);
                }
            }
        }

        //--------------------------------------------------------------------
        void blend_solid_hspan(int x,
            int y,
            unsigned len,
            const color_type& c,
            const int8u* covers)
        {
            pixel_type* p = (pixel_type*)m_rbuf->row_ptr(x, y, len) + x;
            do
            {
                copy_or_blend_pix(p, c, *covers++);
                ++p;
            } while (--len);
        }

        //--------------------------------------------------------------------
        void blend_solid_vspan(int x,
            int y,
            unsigned len,
            const color_type& c,
            const int8u* covers)
        {
            do
            {
                copy_or_blend_pix(
                    (pixel_type*)m_rbuf->row_ptr(x, y++, 1) + x, c, *covers++);
            } while (--len);
        }

        //--------------------------------------------------------------------
        void copy_color_hspan(
            int x, int y, unsigned len, const color_type* colors)
        {
            pixel_type* p = (pixel_type*)m_rbuf->row_ptr(x, y, len) + x;
            do
            {
                *p++ = m_blender.make_pix(colors->r, colors->g, colors->b);
                ++colors;
            } while (--len);
        }

        //--------------------------------------------------------------------
        void copy_color_vspan(
            int x, int y, unsigned len, const color_type* colors)
        {
            do
            {
                pixel_type* p = (pixel_type*)m_rbuf->row_ptr(x, y++, 1) + x;
                *p = m_blender.make_pix(colors->r, colors->g, colors->b);
                ++colors;
            } while (--len);
        }

        //--------------------------------------------------------------------
        void blend_color_hspan(int x,
            int y,
            unsigned len,
            const color_type* colors,
            const int8u* covers,
            int8u cover)
        {
            pixel_type* p = (pixel_type*)m_rbuf->row_ptr(x, y, len) + x;
            do
            {
                copy_or_blend_pix(p++, *colors++, covers ? *covers++ : cover);
            } while (--len);
        }

        //--------------------------------------------------------------------
        void blend_color_vspan(int x,
            int y,
            unsigned len,
            const color_type* colors,
            const int8u* covers,
            int8u cover)
        {
            do
            {
                copy_or_blend_pix((pixel_type*)m_rbuf->row_ptr(x, y++, 1) + x,
                    *colors++,
                    covers ? *covers++ : cover);
            } while (--len);
        }

        //--------------------------------------------------------------------
        template <class RenBuf2>
        void copy_from(const RenBuf2& from,
            int xdst,
            int ydst,
            int xsrc,
            int ysrc,
            unsigned len)
        {
            const int8u* p = from.row_ptr(ysrc);
            if (p)
            {
                std::memmove(
                    m_rbuf->row_ptr(xdst, ydst, len) + xdst * pix_width,
                    p + xsrc * pix_width,
                    len * pix_width);
            }
        }

        //--------------------------------------------------------------------
        template <class SrcPixelFormatRenderer>
        void blend_from(const SrcPixelFormatRenderer& from,
            int xdst,
            int ydst,
            int xsrc,
            int ysrc,
            unsigned len,
            int8u cover)
        {
            typedef typename SrcPixelFormatRenderer::order_type src_order;

            const value_type* psrc = (const value_type*)from.row_ptr(ysrc);
            if (psrc)
            {
                psrc += xsrc * 4;
                pixel_type* pdst =
                    (pixel_type*)m_rbuf->row_ptr(xdst, ydst, len) + xdst;
                do
                {
                    value_type alpha = psrc[src_order::A];
                    if (alpha)
                    {
                        if (alpha == base_mask && cover == 255)
                        {
                            *pdst = m_blender.make_pix(psrc[src_order::R],
                                psrc[src_order::G],
                                psrc[src_order::B]);
                        }
                        else
                        {
                            m_blender.blend_pix(pdst,
                                psrc[src_order::R],
                                psrc[src_order::G],
                                psrc[src_order::B],
                                alpha,
                                cover);
                        }
                    }
                    psrc += 4;
                    ++pdst;
                } while (--len);
            }
        }

        //--------------------------------------------------------------------
        template <class SrcPixelFormatRenderer>
        void blend_from_color(const SrcPixelFormatRenderer& from,
            const color_type& color,
            int xdst,
            int ydst,
            int xsrc,
            int ysrc,
            unsigned len,
            int8u cover)
        {
            typedef typename SrcPixelFormatRenderer::value_type src_value_type;
            typedef typename SrcPixelFormatRenderer::color_type src_color_type;
            const src_value_type* psrc = (src_value_type*)from.row_ptr(ysrc);
            if (psrc)
            {
                psrc += xsrc * SrcPixelFormatRenderer::pix_step +
                        SrcPixelFormatRenderer::pix_offset;
                pixel_type* pdst =
                    (pixel_type*)m_rbuf->row_ptr(xdst, ydst, len) + xdst;

                do
                {
                    m_blender.blend_pix(
                        pdst, color.r, color.g, color.b, color.a, cover);
                    psrc += SrcPixelFormatRenderer::pix_step;
                    ++pdst;
                } while (--len);
            }
        }

        //--------------------------------------------------------------------
        template <class SrcPixelFormatRenderer>
        void blend_from_lut(const SrcPixelFormatRenderer& from,
            const color_type* color_lut,
            int xdst,
            int ydst,
            int xsrc,
            int ysrc,
            unsigned len,
            int8u cover)
        {
            typedef typename SrcPixelFormatRenderer::value_type src_value_type;
            const src_value_type* psrc = (src_value_type*)from.row_ptr(ysrc);
            if (psrc)
            {
                psrc += xsrc * SrcPixelFormatRenderer::pix_step +
                        SrcPixelFormatRenderer::pix_offset;
                pixel_type* pdst =
                    (pixel_type*)m_rbuf->row_ptr(xdst, ydst, len) + xdst;

                do
                {
                    const color_type& color = color_lut[*psrc];
                    m_blender.blend_pix(
                        pdst, color.r, color.g, color.b, color.a, cover);
                    psrc += SrcPixelFormatRenderer::pix_step;
                    ++pdst;
                } while (--len);
            }
        }

    private:
        rbuf_type* m_rbuf;
        Blender m_blender;
    };

    typedef pixfmt_alpha_blend_rgb_packed<blender_rgb555, rendering_buffer>
        pixfmt_rgb555; //----pixfmt_rgb555
    typedef pixfmt_alpha_blend_rgb_packed<blender_rgb565, rendering_buffer>
        pixfmt_rgb565; //----pixfmt_rgb565

    typedef pixfmt_alpha_blend_rgb_packed<blender_rgb555_pre, rendering_buffer>
        pixfmt_rgb555_pre; //----pixfmt_rgb555_pre
    typedef pixfmt_alpha_blend_rgb_packed<blender_rgb565_pre, rendering_buffer>
        pixfmt_rgb565_pre; //----pixfmt_rgb565_pre

    typedef pixfmt_alpha_blend_rgb_packed<blender_rgbAAA, rendering_buffer>
        pixfmt_rgbAAA; //----pixfmt_rgbAAA
    typedef pixfmt_alpha_blend_rgb_packed<blender_bgrAAA, rendering_buffer>
        pixfmt_bgrAAA; //----pixfmt_bgrAAA
    typedef pixfmt_alpha_blend_rgb_packed<blender_rgbBBA, rendering_buffer>
        pixfmt_rgbBBA; //----pixfmt_rgbBBA
    typedef pixfmt_alpha_blend_rgb_packed<blender_bgrABB, rendering_buffer>
        pixfmt_bgrABB; //----pixfmt_bgrABB

    typedef pixfmt_alpha_blend_rgb_packed<blender_rgbAAA_pre, rendering_buffer>
        pixfmt_rgbAAA_pre; //----pixfmt_rgbAAA_pre
    typedef pixfmt_alpha_blend_rgb_packed<blender_bgrAAA_pre, rendering_buffer>
        pixfmt_bgrAAA_pre; //----pixfmt_bgrAAA_pre
    typedef pixfmt_alpha_blend_rgb_packed<blender_rgbBBA_pre, rendering_buffer>
        pixfmt_rgbBBA_pre; //----pixfmt_rgbBBA_pre
    typedef pixfmt_alpha_blend_rgb_packed<blender_bgrABB_pre, rendering_buffer>
        pixfmt_bgrABB_pre; //----pixfmt_bgrABB_pre

    //-----------------------------------------------------pixfmt_rgb555_gamma
    template <class Gamma>
    class pixfmt_rgb555_gamma :
        public pixfmt_alpha_blend_rgb_packed<blender_rgb555_gamma<Gamma>,
            rendering_buffer>
    {
    public:
        pixfmt_rgb555_gamma(rendering_buffer& rb, const Gamma& g):
            pixfmt_alpha_blend_rgb_packed<blender_rgb555_gamma<Gamma>,
                rendering_buffer>(rb)
        {
            this->blender().gamma(g);
        }
    };

    //-----------------------------------------------------pixfmt_rgb565_gamma
    template <class Gamma>
    class pixfmt_rgb565_gamma :
        public pixfmt_alpha_blend_rgb_packed<blender_rgb565_gamma<Gamma>,
            rendering_buffer>
    {
    public:
        pixfmt_rgb565_gamma(rendering_buffer& rb, const Gamma& g):
            pixfmt_alpha_blend_rgb_packed<blender_rgb565_gamma<Gamma>,
                rendering_buffer>(rb)
        {
            this->blender().gamma(g);
        }
    };

    //-----------------------------------------------------pixfmt_rgbAAA_gamma
    template <class Gamma>
    class pixfmt_rgbAAA_gamma :
        public pixfmt_alpha_blend_rgb_packed<blender_rgbAAA_gamma<Gamma>,
            rendering_buffer>
    {
    public:
        pixfmt_rgbAAA_gamma(rendering_buffer& rb, const Gamma& g):
            pixfmt_alpha_blend_rgb_packed<blender_rgbAAA_gamma<Gamma>,
                rendering_buffer>(rb)
        {
            this->blender().gamma(g);
        }
    };

    //-----------------------------------------------------pixfmt_bgrAAA_gamma
    template <class Gamma>
    class pixfmt_bgrAAA_gamma :
        public pixfmt_alpha_blend_rgb_packed<blender_bgrAAA_gamma<Gamma>,
            rendering_buffer>
    {
    public:
        pixfmt_bgrAAA_gamma(rendering_buffer& rb, const Gamma& g):
            pixfmt_alpha_blend_rgb_packed<blender_bgrAAA_gamma<Gamma>,
                rendering_buffer>(rb)
        {
            this->blender().gamma(g);
        }
    };

    //-----------------------------------------------------pixfmt_rgbBBA_gamma
    template <class Gamma>
    class pixfmt_rgbBBA_gamma :
        public pixfmt_alpha_blend_rgb_packed<blender_rgbBBA_gamma<Gamma>,
            rendering_buffer>
    {
    public:
        pixfmt_rgbBBA_gamma(rendering_buffer& rb, const Gamma& g):
            pixfmt_alpha_blend_rgb_packed<blender_rgbBBA_gamma<Gamma>,
                rendering_buffer>(rb)
        {
            this->blender().gamma(g);
        }
    };

    //-----------------------------------------------------pixfmt_bgrABB_gamma
    template <class Gamma>
    class pixfmt_bgrABB_gamma :
        public pixfmt_alpha_blend_rgb_packed<blender_bgrABB_gamma<Gamma>,
            rendering_buffer>
    {
    public:
        pixfmt_bgrABB_gamma(rendering_buffer& rb, const Gamma& g):
            pixfmt_alpha_blend_rgb_packed<blender_bgrABB_gamma<Gamma>,
                rendering_buffer>(rb)
        {
            this->blender().gamma(g);
        }
    };

}

#endif