//---------------------------------------------------------------------------- // 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 //---------------------------------------------------------------------------- // // polyline clipping converter // There an optimized Liang-Basky algorithm is used. // The algorithm doesn't optimize the degenerate edges, i.e. it will never // break a closed polyline into two or more ones, instead, there will be // degenerate edges coinciding with the respective clipping boundaries. // This is a sub-optimal solution, because that optimization would require // extra, rather expensive math while the rasterizer tolerates it quite well, // without any considerable overhead. // //---------------------------------------------------------------------------- #ifndef AGG_CONV_CLIP_polyline_INCLUDED #define AGG_CONV_CLIP_polyline_INCLUDED #include "agg_basics.h" #include "agg_conv_adaptor_vpgen.h" #include "agg_vpgen_clip_polyline.h" namespace agg { //=======================================================conv_clip_polyline template<class VertexSource> struct conv_clip_polyline : public conv_adaptor_vpgen<VertexSource, vpgen_clip_polyline> { typedef conv_adaptor_vpgen<VertexSource, vpgen_clip_polyline> base_type; conv_clip_polyline(VertexSource& vs) : conv_adaptor_vpgen<VertexSource, vpgen_clip_polyline>(vs) {} void clip_box(double x1, double y1, double x2, double y2) { base_type::vpgen().clip_box(x1, y1, x2, y2); } double x1() const { return base_type::vpgen().x1(); } double y1() const { return base_type::vpgen().y1(); } double x2() const { return base_type::vpgen().x2(); } double y2() const { return base_type::vpgen().y2(); } private: conv_clip_polyline(const conv_clip_polyline<VertexSource>&); const conv_clip_polyline<VertexSource>& operator = (const conv_clip_polyline<VertexSource>&); }; } #endif