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_POLYGON_INCLUDED 17 #define AGG_VPGEN_CLIP_POLYGON_INCLUDED 18 19 #include "agg_basics.h" 20 21 namespace agg 22 { 23 24 //======================================================vpgen_clip_polygon 25 // 26 // See Implementation agg_vpgen_clip_polygon.cpp 27 // 28 class vpgen_clip_polygon 29 { 30 public: 31 vpgen_clip_polygon() : 32 m_clip_box(0, 0, 1, 1), 33 m_x1(0), 34 m_y1(0), 35 m_clip_flags(0), 36 m_num_vertices(0), 37 m_vertex(0), 38 m_cmd(path_cmd_move_to) 39 { 40 } 41 42 void clip_box(double x1, double y1, double x2, double y2) 43 { 44 m_clip_box.x1 = x1; 45 m_clip_box.y1 = y1; 46 m_clip_box.x2 = x2; 47 m_clip_box.y2 = y2; 48 m_clip_box.normalize(); 49 } 50 51 52 double x1() const { return m_clip_box.x1; } 53 double y1() const { return m_clip_box.y1; } 54 double x2() const { return m_clip_box.x2; } 55 double y2() const { return m_clip_box.y2; } 56 57 static bool auto_close() { return true; } 58 static bool auto_unclose() { return false; } 59 60 void reset(); 61 void move_to(double x, double y); 62 void line_to(double x, double y); 63 unsigned vertex(double* x, double* y); 64 65 private: 66 unsigned clipping_flags(double x, double y); 67 68 private: 69 rect_d m_clip_box; 70 double m_x1; 71 double m_y1; 72 unsigned m_clip_flags; 73 double m_x[4]; 74 double m_y[4]; 75 unsigned m_num_vertices; 76 unsigned m_vertex; 77 unsigned m_cmd; 78 }; 79 80 } 81 82 83 #endif 84