headers/libs/agg/agg_vpgen_clip_polyline.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_VPGEN_CLIP_POLYLINE_INCLUDED
  17 #define AGG_VPGEN_CLIP_POLYLINE_INCLUDED
  18
  19 #include "agg_basics.h"
  20
  21 namespace agg
  22 {
  23
  24     //======================================================vpgen_clip_polyline
  25     //
  26     // See Implementation agg_vpgen_clip_polyline.cpp
  27     //
  28     class vpgen_clip_polyline
  29     {
  30     public:
  31         vpgen_clip_polyline() :
  32             m_clip_box(0, 0, 1, 1),
  33             m_x1(0),
  34             m_y1(0),
  35             m_num_vertices(0),
  36             m_vertex(0),
  37             m_move_to(false)
  38         {
  39         }
  40
  41         void clip_box(double x1, double y1, double x2, double y2)
  42         {
  43             m_clip_box.x1 = x1;
  44             m_clip_box.y1 = y1;
  45             m_clip_box.x2 = x2;
  46             m_clip_box.y2 = y2;
  47             m_clip_box.normalize();
  48         }
  49
  50         double x1() const { return m_clip_box.x1; }
  51         double y1() const { return m_clip_box.y1; }
  52         double x2() const { return m_clip_box.x2; }
  53         double y2() const { return m_clip_box.y2; }
  54
  55         static bool auto_close()   { return false; }
  56         static bool auto_unclose() { return true; }
  57
  58         void     reset();
  59         void     move_to(double x, double y);
  60         void     line_to(double x, double y);
  61         unsigned vertex(double* x, double* y);
  62
  63     private:
  64         rect_d        m_clip_box;
  65         double        m_x1;
  66         double        m_y1;
  67         double        m_x[2];
  68         double        m_y[2];
  69         unsigned      m_cmd[2];
  70         unsigned      m_num_vertices;
  71         unsigned      m_vertex;
  72         bool          m_move_to;
  73     };
  74
  75 }
  76
  77
  78 #endif