agg/inc/agg_span_generator.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_GENERATOR_INCLUDED
  17 #define AGG_SPAN_GENERATOR_INCLUDED
  18
  19 #include "agg_basics.h"
  20 #include "agg_span_allocator.h"
  21
  22 namespace agg
  23 {
  24
  25     //==========================================================span_generator
  26     template<class ColorT, class Allocator> class span_generator
  27     {
  28     public:
  29         typedef ColorT color_type;
  30         typedef Allocator alloc_type;
  31
  32         //--------------------------------------------------------------------
  33         span_generator(alloc_type& alloc) : m_alloc(&alloc) {}
  34
  35         //--------------------------------------------------------------------
  36         void allocator(alloc_type& alloc) { m_alloc = &alloc; }
  37         alloc_type& allocator() { return *m_alloc; }
  38
  39         //--------------------------------------------------------------------
  40         void prepare(unsigned max_span_len)
  41         {
  42             m_alloc->allocate(max_span_len);
  43         }
  44
  45     private:
  46         alloc_type* m_alloc;
  47     };
  48 }
  49
  50 #endif