headers/libs/agg/agg_conv_unclose_polygon.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_CONV_UNCLOSE_POLYGON_INCLUDED
  17 #define AGG_CONV_UNCLOSE_POLYGON_INCLUDED
  18
  19 #include "agg_basics.h"
  20
  21 namespace agg
  22 {
  23     //====================================================conv_unclose_polygon
  24     template<class VertexSource> class conv_unclose_polygon
  25     {
  26     public:
  27         conv_unclose_polygon(VertexSource& vs) : m_source(&vs) {}
  28         void attach(VertexSource& source) { m_source = &source; }
  29
  30         void rewind(unsigned path_id)
  31         {
  32             m_source->rewind(path_id);
  33         }
  34
  35         unsigned vertex(double* x, double* y)
  36         {
  37             unsigned cmd = m_source->vertex(x, y);
  38             if(is_end_poly(cmd)) cmd &= ~path_flags_close;
  39             return cmd;
  40         }
  41
  42     private:
  43         conv_unclose_polygon(const conv_unclose_polygon<VertexSource>&);
  44         const conv_unclose_polygon<VertexSource>&
  45             operator = (const conv_unclose_polygon<VertexSource>&);
  46
  47         VertexSource* m_source;
  48     };
  49
  50 }
  51
  52 #endif