//---------------------------------------------------------------------------- // Anti-Grain Geometry - Version 2.2 // Copyright (C) 2002-2004 Maxim Shemanarev (http://www.antigrain.com) // // Permission to copy, use, modify, sell and distribute this software // is granted provided this copyright notice appears in all copies. // This software is provided "as is" without express or implied // warranty, and with no claim as to its suitability for any purpose. // //---------------------------------------------------------------------------- // Contact: mcseem@antigrain.com // mcseemagg@yahoo.com // http://www.antigrain.com //---------------------------------------------------------------------------- #ifndef AGG_VCGEN_VERTEX_SEQUENCE_INCLUDED #define AGG_VCGEN_VERTEX_SEQUENCE_INCLUDED #include "agg_basics.h" #include "agg_vertex_sequence.h" #include "agg_shorten_path.h" namespace agg { //===================================================vcgen_vertex_sequence class vcgen_vertex_sequence { public: typedef vertex_dist_cmd vertex_type; typedef vertex_sequence<vertex_type, 6> vertex_storage; vcgen_vertex_sequence() : m_flags(0), m_cur_vertex(0), m_shorten(0.0), m_ready(false) { } // Vertex Generator Interface void remove_all(); void add_vertex(double x, double y, unsigned cmd); // Vertex Source Interface void rewind(unsigned id); unsigned vertex(double* x, double* y); void shorten(double s) { m_shorten = s; } double shorten() const { return m_shorten; } private: vcgen_vertex_sequence(const vcgen_vertex_sequence&); const vcgen_vertex_sequence& operator = (const vcgen_vertex_sequence&); vertex_storage m_src_vertices; unsigned m_flags; unsigned m_cur_vertex; double m_shorten; bool m_ready; }; //------------------------------------------------------------------------ inline void vcgen_vertex_sequence::remove_all() { m_ready = false; m_src_vertices.remove_all(); m_cur_vertex = 0; m_flags = 0; } //------------------------------------------------------------------------ inline void vcgen_vertex_sequence::add_vertex(double x, double y, unsigned cmd) { m_ready = false; if(is_move_to(cmd)) { m_src_vertices.modify_last(vertex_dist_cmd(x, y, cmd)); } else { if(is_vertex(cmd)) { m_src_vertices.add(vertex_dist_cmd(x, y, cmd)); } else { m_flags = cmd & path_flags_mask; } } } //------------------------------------------------------------------------ inline void vcgen_vertex_sequence::rewind(unsigned) { if(!m_ready) { m_src_vertices.close(is_closed(m_flags)); shorten_path(m_src_vertices, m_shorten, get_close_flag(m_flags)); } m_ready = true; m_cur_vertex = 0; } //------------------------------------------------------------------------ inline unsigned vcgen_vertex_sequence::vertex(double* x, double* y) { if(!m_ready) { rewind(0); } if(m_cur_vertex == m_src_vertices.size()) { ++m_cur_vertex; return path_cmd_end_poly | m_flags; } if(m_cur_vertex > m_src_vertices.size()) { return path_cmd_stop; } vertex_type& v = m_src_vertices[m_cur_vertex++]; *x = v.x; *y = v.y; return v.cmd; } } #endif