agg/inc/agg_span_converter.h

   1 //----------------------------------------------------------------------------
   2 // Anti-Grain Geometry - Version 2.3
   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 Conv> class span_converter
  25     {
  26     public:
  27         typedef typename SpanGenerator::color_type color_type;
  28
  29         span_converter(SpanGenerator& span_gen, Conv& conv) :
  30             m_span_gen(&span_gen), m_conv(&conv) {}
  31
  32         //--------------------------------------------------------------------
  33         void prepare(unsigned max_span_len)
  34         {
  35             m_span_gen->prepare(max_span_len);
  36         }
  37
  38         //--------------------------------------------------------------------
  39         color_type* generate(int x, int y, unsigned len)
  40         {
  41             color_type* span = m_span_gen->generate(x, y, len);
  42             m_conv->convert(span, x, y, len);
  43             return span;
  44         }
  45
  46     private:
  47         SpanGenerator* m_span_gen;
  48         Conv*          m_conv;
  49     };
  50
  51 }
  52
  53 #endif