headers/libs/agg/agg_span_converter.h

   1 //----------------------------------------------------------------------------
   2 // Anti-Grain Geometry - Version 2.4
   3 // Copyright (C) 2002-2005 Maxim Shemanarev (http://www.antigrain.com)
   4 //
   5 // Permission to copy, use, modify, sell and distribute this software
   6 // is granted provided this copyright notice appears in all copies.
   7 // This software is provided "as is" without express or implied
   8 // warranty, and with no claim as to its suitability for any purpose.
   9 //
  10 //----------------------------------------------------------------------------
  11 // Contact: mcseem@antigrain.com
  12 //          mcseemagg@yahoo.com
  13 //          http://www.antigrain.com
  14 //----------------------------------------------------------------------------
  15
  16 #ifndef AGG_SPAN_CONVERTER_INCLUDED
  17 #define AGG_SPAN_CONVERTER_INCLUDED
  18
  19 #include "agg_basics.h"
  20
  21 namespace agg
  22 {
  23     //----------------------------------------------------------span_converter
  24     template<class SpanGenerator, class SpanConverter> class span_converter
  25     {
  26     public:
  27         typedef typename SpanGenerator::color_type color_type;
  28
  29         span_converter(SpanGenerator& span_gen, SpanConverter& span_cnv) :
  30             m_span_gen(&span_gen), m_span_cnv(&span_cnv) {}
  31
  32         void attach_generator(SpanGenerator& span_gen) { m_span_gen = &span_gen; }
  33         void attach_converter(SpanConverter& span_cnv) { m_span_cnv = &span_cnv; }
  34
  35         //--------------------------------------------------------------------
  36         void prepare()
  37         {
  38             m_span_gen->prepare();
  39             m_span_cnv->prepare();
  40         }
  41
  42         //--------------------------------------------------------------------
  43         void generate(color_type* span, int x, int y, unsigned len)
  44         {
  45             m_span_gen->generate(span, x, y, len);
  46             m_span_cnv->generate(span, x, y, len);
  47         }
  48
  49     private:
  50         SpanGenerator* m_span_gen;
  51         SpanConverter* m_span_cnv;
  52     };
  53
  54 }
  55
  56 #endif