//---------------------------------------------------------------------------- // Anti-Grain Geometry - Version 2.4 // Copyright (C) 2002-2005 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_VPGEN_CLIP_POLYGON_INCLUDED #define AGG_VPGEN_CLIP_POLYGON_INCLUDED #include "agg_basics.h" // https://github.com/mapnik/mapnik/issues/1860 #include <mapnik/config.hpp> namespace agg { //======================================================vpgen_clip_polygon // // See Implementation agg_vpgen_clip_polygon.cpp // class MAPNIK_DECL vpgen_clip_polygon { public: vpgen_clip_polygon() : m_clip_box(0, 0, 1, 1), m_x1(0), m_y1(0), m_clip_flags(0), m_num_vertices(0), m_vertex(0), m_cmd(path_cmd_move_to) { } void clip_box(double x1, double y1, double x2, double y2) { m_clip_box.x1 = x1; m_clip_box.y1 = y1; m_clip_box.x2 = x2; m_clip_box.y2 = y2; m_clip_box.normalize(); } double x1() const { return m_clip_box.x1; } double y1() const { return m_clip_box.y1; } double x2() const { return m_clip_box.x2; } double y2() const { return m_clip_box.y2; } static bool auto_close() { return true; } static bool auto_unclose() { return false; } void reset(); void move_to(double x, double y); void line_to(double x, double y); unsigned vertex(double* x, double* y); private: unsigned clipping_flags(double x, double y); private: rect_d m_clip_box; double m_x1; double m_y1; unsigned m_clip_flags; double m_x[4]; double m_y[4]; unsigned m_num_vertices; unsigned m_vertex; unsigned m_cmd; }; } #endif