agg_color_conv_rgb8.h

windows ce 下的画各种b样条曲线

//----------------------------------------------------------------------------
// Anti-Grain Geometry (AGG) - Version 2.5
// A high quality rendering engine for C++
// Copyright (C) 2002-2006 Maxim Shemanarev
// Contact: [e-mail]
//          [e-mail]
//          http://antigrain.com
// 
// AGG is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License
// as published by the Free Software Foundation; either version 2
// of the License, or (at your option) any later version.
// 
// AGG is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
// 
// You should have received a copy of the GNU General Public License
// along with AGG; if not, write to the Free Software
// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, 
// MA 02110-1301, USA.
//----------------------------------------------------------------------------
//
// A set of functors used with color_conv(). See file agg_color_conv.h
// These functors can convert images with up to 8 bits per component.
// Use convertors in the following way:
//
// agg::color_conv(dst, src, agg::color_conv_XXXX_to_YYYY());
// whare XXXX and YYYY can be any of:
//  rgb24
//  bgr24
//  rgba32
//  abgr32
//  argb32
//  bgra32
//  rgb555
//  rgb565
//----------------------------------------------------------------------------

#ifndef AGG_COLOR_CONV_RGB8_INCLUDED
#define AGG_COLOR_CONV_RGB8_INCLUDED

#include "agg_basics.h"
#include "agg_color_conv.h"

namespace agg
{

    //-----------------------------------------------------color_conv_rgb24
    class color_conv_rgb24
    {
    public:
        void operator () (int8u* dst, 
                          const int8u* src,
                          unsigned width) const
        {
            do
            {
                *dst++ = src[2];
                *dst++ = src[1];
                *dst++ = src[0];
                src += 3;
            }
            while(--width);
        }
    };

    typedef color_conv_rgb24 color_conv_rgb24_to_bgr24;
    typedef color_conv_rgb24 color_conv_bgr24_to_rgb24;

    typedef color_conv_same<3> color_conv_bgr24_to_bgr24;
    typedef color_conv_same<3> color_conv_rgb24_to_rgb24;



    //------------------------------------------------------color_conv_rgba32
    template<int I1, int I2, int I3, int I4> class color_conv_rgba32
    {
    public:
        void operator () (int8u* dst, 
                          const int8u* src,
                          unsigned width) const
        {
            do
            {
                *dst++ = src[I1];
                *dst++ = src[I2];
                *dst++ = src[I3];
                *dst++ = src[I4]; 
                src += 4;
            }
            while(--width);
        }
    };


    //------------------------------------------------------------------------
    typedef color_conv_rgba32<0,3,2,1> color_conv_argb32_to_abgr32; //----color_conv_argb32_to_abgr32
    typedef color_conv_rgba32<3,2,1,0> color_conv_argb32_to_bgra32; //----color_conv_argb32_to_bgra32
    typedef color_conv_rgba32<1,2,3,0> color_conv_argb32_to_rgba32; //----color_conv_argb32_to_rgba32
    typedef color_conv_rgba32<3,0,1,2> color_conv_bgra32_to_abgr32; //----color_conv_bgra32_to_abgr32
    typedef color_conv_rgba32<3,2,1,0> color_conv_bgra32_to_argb32; //----color_conv_bgra32_to_argb32
    typedef color_conv_rgba32<2,1,0,3> color_conv_bgra32_to_rgba32; //----color_conv_bgra32_to_rgba32
    typedef color_conv_rgba32<3,2,1,0> color_conv_rgba32_to_abgr32; //----color_conv_rgba32_to_abgr32
    typedef color_conv_rgba32<3,0,1,2> color_conv_rgba32_to_argb32; //----color_conv_rgba32_to_argb32
    typedef color_conv_rgba32<2,1,0,3> color_conv_rgba32_to_bgra32; //----color_conv_rgba32_to_bgra32
    typedef color_conv_rgba32<0,3,2,1> color_conv_abgr32_to_argb32; //----color_conv_abgr32_to_argb32
    typedef color_conv_rgba32<1,2,3,0> color_conv_abgr32_to_bgra32; //----color_conv_abgr32_to_bgra32
    typedef color_conv_rgba32<3,2,1,0> color_conv_abgr32_to_rgba32; //----color_conv_abgr32_to_rgba32

    //------------------------------------------------------------------------
    typedef color_conv_same<4> color_conv_rgba32_to_rgba32; //----color_conv_rgba32_to_rgba32
    typedef color_conv_same<4> color_conv_argb32_to_argb32; //----color_conv_argb32_to_argb32
    typedef color_conv_same<4> color_conv_bgra32_to_bgra32; //----color_conv_bgra32_to_bgra32
    typedef color_conv_same<4> color_conv_abgr32_to_abgr32; //----color_conv_abgr32_to_abgr32


    //--------------------------------------------color_conv_rgb24_rgba32
    template<int I1, int I2, int I3, int A> class color_conv_rgb24_rgba32
    {
    public:
        void operator () (int8u* dst, 
                          const int8u* src,
                          unsigned width) const
        {
            do
            {
                dst[I1] = *src++;
                dst[I2] = *src++;
                dst[I3] = *src++;
                dst[A]  = 255; 
                dst += 4;
            }
            while(--width);
        }
    };


    //------------------------------------------------------------------------
    typedef color_conv_rgb24_rgba32<1,2,3,0> color_conv_rgb24_to_argb32; //----color_conv_rgb24_to_argb32
    typedef color_conv_rgb24_rgba32<3,2,1,0> color_conv_rgb24_to_abgr32; //----color_conv_rgb24_to_abgr32
    typedef color_conv_rgb24_rgba32<2,1,0,3> color_conv_rgb24_to_bgra32; //----color_conv_rgb24_to_bgra32
    typedef color_conv_rgb24_rgba32<0,1,2,3> color_conv_rgb24_to_rgba32; //----color_conv_rgb24_to_rgba32
    typedef color_conv_rgb24_rgba32<3,2,1,0> color_conv_bgr24_to_argb32; //----color_conv_bgr24_to_argb32
    typedef color_conv_rgb24_rgba32<1,2,3,0> color_conv_bgr24_to_abgr32; //----color_conv_bgr24_to_abgr32
    typedef color_conv_rgb24_rgba32<0,1,2,3> color_conv_bgr24_to_bgra32; //----color_conv_bgr24_to_bgra32
    typedef color_conv_rgb24_rgba32<2,1,0,3> color_conv_bgr24_to_rgba32; //----color_conv_bgr24_to_rgba32

    

    //-------------------------------------------------color_conv_rgba32_rgb24
    template<int I1, int I2, int I3> class color_conv_rgba32_rgb24
    {
    public:
        void operator () (int8u* dst, 
                          const int8u* src,
                          unsigned width) const
        {
            do
            {
                *dst++ = src[I1];
                *dst++ = src[I2];
                *dst++ = src[I3];
                src += 4;
            }
            while(--width);
        }
    };



    //------------------------------------------------------------------------
    typedef color_conv_rgba32_rgb24<1,2,3> color_conv_argb32_to_rgb24; //----color_conv_argb32_to_rgb24
    typedef color_conv_rgba32_rgb24<3,2,1> color_conv_abgr32_to_rgb24; //----color_conv_abgr32_to_rgb24
    typedef color_conv_rgba32_rgb24<2,1,0> color_conv_bgra32_to_rgb24; //----color_conv_bgra32_to_rgb24
    typedef color_conv_rgba32_rgb24<0,1,2> color_conv_rgba32_to_rgb24; //----color_conv_rgba32_to_rgb24
    typedef color_conv_rgba32_rgb24<3,2,1> color_conv_argb32_to_bgr24; //----color_conv_argb32_to_bgr24
    typedef color_conv_rgba32_rgb24<1,2,3> color_conv_abgr32_to_bgr24; //----color_conv_abgr32_to_bgr24
    typedef color_conv_rgba32_rgb24<0,1,2> color_conv_bgra32_to_bgr24; //----color_conv_bgra32_to_bgr24
    typedef color_conv_rgba32_rgb24<2,1,0> color_conv_rgba32_to_bgr24; //----color_conv_rgba32_to_bgr24


    //------------------------------------------------color_conv_rgb555_rgb24
    template<int R, int B> class color_conv_rgb555_rgb24
    {
    public:
        void operator () (int8u* dst, 
                          const int8u* src,
                          unsigned width) const
        {
            do
            {
                unsigned rgb = *(int16u*)src;
                dst[R] = (int8u)((rgb >> 7) & 0xF8);
                dst[1] = (int8u)((rgb >> 2) & 0xF8);
                dst[B] = (int8u)((rgb << 3) & 0xF8);
                src += 2;
                dst += 3;
            }
            while(--width);
        }
    };


    //------------------------------------------------------------------------
    typedef color_conv_rgb555_rgb24<2,0> color_conv_rgb555_to_bgr24; //----color_conv_rgb555_to_bgr24
    typedef color_conv_rgb555_rgb24<0,2> color_conv_rgb555_to_rgb24; //----color_conv_rgb555_to_rgb24


    //-------------------------------------------------color_conv_rgb24_rgb555
    template<int R, int B> class color_conv_rgb24_rgb555
    {
    public:
        void operator () (int8u* dst, 
                          const int8u* src,
                          unsigned width) const
        {
            do
            {
                *(int16u*)dst = (int16u)(((unsigned(src[R]) << 7) & 0x7C00) | 
                                         ((unsigned(src[1]) << 2) & 0x3E0)  |
                                         ((unsigned(src[B]) >> 3)));
                src += 3;
                dst += 2;
            }
            while(--width);
        }
    };


    //------------------------------------------------------------------------
    typedef color_conv_rgb24_rgb555<2,0> color_conv_bgr24_to_rgb555; //----color_conv_bgr24_to_rgb555
    typedef color_conv_rgb24_rgb555<0,2> color_conv_rgb24_to_rgb555; //----color_conv_rgb24_to_rgb555


    //-------------------------------------------------color_conv_rgb565_rgb24
    template<int R, int B> class color_conv_rgb565_rgb24
    {
    public: