agg_color_conv.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.
//----------------------------------------------------------------------------

#ifndef AGG_COLOR_CONV_INCLUDED
#define AGG_COLOR_CONV_INCLUDED

#include <string.h>
#include "agg_basics.h"
#include "agg_rendering_buffer.h"




namespace agg
{

    //--------------------------------------------------------------color_conv
    template<class RenBuf, class CopyRow> 
    void color_conv(RenBuf* dst, const RenBuf* src, CopyRow copy_row_functor)
    {
        unsigned width = src->width();
        unsigned height = src->height();

        if(dst->width()  < width)  width  = dst->width();
        if(dst->height() < height) height = dst->height();

        if(width)
        {
            unsigned y;
            for(y = 0; y < height; y++)
            {
                copy_row_functor(dst->row_ptr(0, y, width), 
                                 src->row_ptr(y), 
                                 width);
            }
        }
    }


    //---------------------------------------------------------color_conv_row
    template<class CopyRow> 
    void color_conv_row(int8u* dst, 
                        const int8u* src,
                        unsigned width,
                        CopyRow copy_row_functor)
    {
        copy_row_functor(dst, src, width);
    }


    //---------------------------------------------------------color_conv_same
    template<int BPP> class color_conv_same
    {
    public:
        void operator () (int8u* dst, 
                          const int8u* src,
                          unsigned width) const
        {
            memmove(dst, src, width*BPP);
        }
    };


}



#endif