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Diffstat (limited to 'agg/inc/agg_conv_adaptor_vpgen.h')
-rwxr-xr-x | agg/inc/agg_conv_adaptor_vpgen.h | 166 |
1 files changed, 166 insertions, 0 deletions
diff --git a/agg/inc/agg_conv_adaptor_vpgen.h b/agg/inc/agg_conv_adaptor_vpgen.h new file mode 100755 index 000000000000..f6afdb4d7f12 --- /dev/null +++ b/agg/inc/agg_conv_adaptor_vpgen.h @@ -0,0 +1,166 @@ +//---------------------------------------------------------------------------- +// 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_ADAPTOR_VPGEN_INCLUDED +#define AGG_CONV_ADAPTOR_VPGEN_INCLUDED + +#include "agg_basics.h" +#include "agg_vertex_iterator.h" + +namespace agg +{ + + //======================================================conv_adaptor_vpgen + template<class VertexSource, class VPGen> class conv_adaptor_vpgen + { + public: + conv_adaptor_vpgen(VertexSource& source) : m_source(&source) {} + + void set_source(VertexSource& source) { m_source = &source; } + + VPGen& vpgen() { return m_vpgen; } + const VPGen& vpgen() const { return m_vpgen; } + + void rewind(unsigned path_id); + unsigned vertex(double* x, double* y); + + typedef conv_adaptor_vpgen<VertexSource, VPGen> 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_adaptor_vpgen(const conv_adaptor_vpgen<VertexSource, VPGen>&); + const conv_adaptor_vpgen<VertexSource, VPGen>& + operator = (const conv_adaptor_vpgen<VertexSource, VPGen>&); + + VertexSource* m_source; + VPGen m_vpgen; + double m_start_x; + double m_start_y; + unsigned m_poly_flags; + int m_vertices; + }; + + + + //------------------------------------------------------------------------ + template<class VertexSource, class VPGen> + void conv_adaptor_vpgen<VertexSource, VPGen>::rewind(unsigned path_id) + { + m_source->rewind(path_id); + m_vpgen.reset(); + m_start_x = 0; + m_start_y = 0; + m_poly_flags = 0; + m_vertices = 0; + } + + + //------------------------------------------------------------------------ + template<class VertexSource, class VPGen> + unsigned conv_adaptor_vpgen<VertexSource, VPGen>::vertex(double* x, double* y) + { + unsigned cmd = path_cmd_stop; + for(;;) + { + cmd = m_vpgen.vertex(x, y); + if(!is_stop(cmd)) break; + + if(m_poly_flags && !m_vpgen.auto_unclose()) + { + *x = 0.0; + *y = 0.0; + cmd = m_poly_flags; + m_poly_flags = 0; + break; + } + + if(m_vertices < 0) + { + if(m_vertices < -1) + { + m_vertices = 0; + return path_cmd_stop; + } + m_vpgen.move_to(m_start_x, m_start_y); + m_vertices = 1; + continue; + } + + double tx, ty; + cmd = m_source->vertex(&tx, &ty); + if(is_vertex(cmd)) + { + if(is_move_to(cmd)) + { + if(m_vpgen.auto_close() && m_vertices > 2) + { + m_vpgen.line_to(m_start_x, m_start_y); + m_poly_flags = path_cmd_end_poly | path_flags_close; + m_start_x = tx; + m_start_y = ty; + m_vertices = -1; + continue; + } + m_vpgen.move_to(tx, ty); + m_start_x = tx; + m_start_y = ty; + m_vertices = 1; + } + else + { + m_vpgen.line_to(tx, ty); + ++m_vertices; + } + } + else + { + if(is_end_poly(cmd)) + { + m_poly_flags = cmd; + if(is_closed(cmd) || m_vpgen.auto_close()) + { + if(m_vpgen.auto_close()) m_poly_flags |= path_flags_close; + if(m_vertices > 2) + { + m_vpgen.line_to(m_start_x, m_start_y); + } + m_vertices = 0; + } + } + else + { + // path_cmd_stop + if(m_vpgen.auto_close() && m_vertices > 2) + { + m_vpgen.line_to(m_start_x, m_start_y); + m_poly_flags = path_cmd_end_poly | path_flags_close; + m_vertices = -2; + continue; + } + break; + } + } + } + return cmd; + } + + +} + + +#endif + |