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Diffstat (limited to 'agg/inc/agg_conv_close_polygon.h')
-rwxr-xr-x | agg/inc/agg_conv_close_polygon.h | 132 |
1 files changed, 132 insertions, 0 deletions
diff --git a/agg/inc/agg_conv_close_polygon.h b/agg/inc/agg_conv_close_polygon.h new file mode 100755 index 000000000000..60a756a7408a --- /dev/null +++ b/agg/inc/agg_conv_close_polygon.h @@ -0,0 +1,132 @@ +//---------------------------------------------------------------------------- +// Anti-Grain Geometry - Version 2.3 +// 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_CONV_CLOSE_POLYGON_INCLUDED +#define AGG_CONV_CLOSE_POLYGON_INCLUDED + +#include "agg_basics.h" +#include "agg_vertex_iterator.h" + +namespace agg +{ + + //======================================================conv_close_polygon + template<class VertexSource> class conv_close_polygon + { + public: + conv_close_polygon(VertexSource& vs) : m_source(&vs) {} + + void set_source(VertexSource& source) { m_source = &source; } + + void rewind(unsigned path_id); + unsigned vertex(double* x, double* y); + + typedef conv_close_polygon<VertexSource> source_type; + typedef vertex_iterator<source_type> iterator; + iterator begin(unsigned id) { return iterator(*this, id); } + iterator end() { return iterator(path_cmd_stop); } + + private: + conv_close_polygon(const conv_close_polygon<VertexSource>&); + const conv_close_polygon<VertexSource>& + operator = (const conv_close_polygon<VertexSource>&); + + VertexSource* m_source; + unsigned m_cmd[2]; + double m_x[2]; + double m_y[2]; + unsigned m_vertex; + bool m_line_to; + }; + + + + //------------------------------------------------------------------------ + template<class VertexSource> + void conv_close_polygon<VertexSource>::rewind(unsigned path_id) + { + m_source->rewind(path_id); + m_vertex = 2; + m_line_to = false; + } + + + + //------------------------------------------------------------------------ + template<class VertexSource> + unsigned conv_close_polygon<VertexSource>::vertex(double* x, double* y) + { + unsigned cmd = path_cmd_stop; + for(;;) + { + if(m_vertex < 2) + { + *x = m_x[m_vertex]; + *y = m_y[m_vertex]; + cmd = m_cmd[m_vertex]; + ++m_vertex; + break; + } + + cmd = m_source->vertex(x, y); + + if(is_end_poly(cmd)) + { + cmd |= path_flags_close; + break; + } + + if(is_stop(cmd)) + { + if(m_line_to) + { + m_cmd[0] = path_cmd_end_poly | path_flags_close; + m_cmd[1] = path_cmd_stop; + m_vertex = 0; + m_line_to = false; + continue; + } + break; + } + + if(is_move_to(cmd)) + { + if(m_line_to) + { + m_x[0] = 0.0; + m_y[0] = 0.0; + m_cmd[0] = path_cmd_end_poly | path_flags_close; + m_x[1] = *x; + m_y[1] = *y; + m_cmd[1] = cmd; + m_vertex = 0; + m_line_to = false; + continue; + } + break; + } + + if(is_vertex(cmd)) + { + m_line_to = true; + break; + } + } + return cmd; + } + +} + +#endif |