1 2 //---------------------------------------------------------------------------- 3 // Anti-Grain Geometry - Version 2.3 4 // Copyright (C) 2002-2005 Maxim Shemanarev (http://www.antigrain.com) 5 // 6 // Permission to copy, use, modify, sell and distribute this software 7 // is granted provided this copyright notice appears in all copies. 8 // This software is provided "as is" without express or implied 9 // warranty, and with no claim as to its suitability for any purpose. 10 // 11 //---------------------------------------------------------------------------- 12 // Contact: mcseem (at) antigrain.com 13 // mcseemagg (at) yahoo.com 14 // http://www.antigrain.com 15 //---------------------------------------------------------------------------- 16 // 17 // Line dash generator 18 // 19 //---------------------------------------------------------------------------- 20 #ifndef AGG_VCGEN_DASH_INCLUDED 21 #define AGG_VCGEN_DASH_INCLUDED 22 #include "agg_basics.h" 23 #include "agg_vertex_sequence.h" 24 namespace agg 25 { 26 class vcgen_dash 27 { 28 enum max_dashes_e { 29 max_dashes = 32 30 }; 31 enum status_e { 32 initial, 33 ready, 34 polyline, 35 stop 36 }; 37 public: 38 typedef vertex_sequence<vertex_dist, 6> vertex_storage; 39 vcgen_dash(); 40 void remove_all_dashes(); 41 void add_dash(FX_FLOAT dash_len, FX_FLOAT gap_len); 42 void dash_start(FX_FLOAT ds); 43 void shorten(FX_FLOAT s) 44 { 45 m_shorten = s; 46 } 47 double shorten() const 48 { 49 return m_shorten; 50 } 51 void remove_all(); 52 void add_vertex(FX_FLOAT x, FX_FLOAT y, unsigned cmd); 53 void rewind(unsigned path_id); 54 unsigned vertex(FX_FLOAT* x, FX_FLOAT* y); 55 private: 56 vcgen_dash(const vcgen_dash&); 57 const vcgen_dash& operator = (const vcgen_dash&); 58 void calc_dash_start(FX_FLOAT ds); 59 FX_FLOAT m_dashes[max_dashes]; 60 FX_FLOAT m_total_dash_len; 61 unsigned m_num_dashes; 62 FX_FLOAT m_dash_start; 63 FX_FLOAT m_shorten; 64 FX_FLOAT m_curr_dash_start; 65 unsigned m_curr_dash; 66 FX_FLOAT m_curr_rest; 67 const vertex_dist* m_v1; 68 const vertex_dist* m_v2; 69 vertex_storage m_src_vertices; 70 unsigned m_closed; 71 status_e m_status; 72 unsigned m_src_vertex; 73 }; 74 } 75 #endif 76
