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Diffstat (limited to 'agg/inc/agg_conv_adaptor_vcgen.h')
-rwxr-xr-x | agg/inc/agg_conv_adaptor_vcgen.h | 169 |
1 files changed, 169 insertions, 0 deletions
diff --git a/agg/inc/agg_conv_adaptor_vcgen.h b/agg/inc/agg_conv_adaptor_vcgen.h new file mode 100755 index 000000000000..f8233a388357 --- /dev/null +++ b/agg/inc/agg_conv_adaptor_vcgen.h @@ -0,0 +1,169 @@ +//---------------------------------------------------------------------------- +// 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_VCGEN_INCLUDED +#define AGG_CONV_ADAPTOR_VCGEN_INCLUDED + +#include "agg_basics.h" +#include "agg_vertex_iterator.h" + +namespace agg +{ + //------------------------------------------------------------null_markers + struct null_markers + { + void remove_all() {} + void add_vertex(double, double, unsigned) {} + void prepare_src() {} + + void rewind(unsigned) {} + unsigned vertex(double*, double*) { return path_cmd_stop; } + + typedef null_markers source_type; + typedef vertex_iterator<source_type> iterator; + iterator begin(unsigned id) { return iterator(*this, id); } + iterator end() { return iterator(path_cmd_stop); } + }; + + + //------------------------------------------------------conv_adaptor_vcgen + template<class VertexSource, + class Generator, + class Markers=null_markers> class conv_adaptor_vcgen + { + enum status + { + initial, + accumulate, + generate + }; + + public: + conv_adaptor_vcgen(VertexSource& source) : + m_source(&source), + m_status(initial) + {} + + void set_source(VertexSource& source) { m_source = &source; } + + Generator& generator() { return m_generator; } + const Generator& generator() const { return m_generator; } + + Markers& markers() { return m_markers; } + const Markers& markers() const { return m_markers; } + + void rewind(unsigned id) + { + m_source->rewind(id); + m_status = initial; + } + + unsigned vertex(double* x, double* y); + + typedef conv_adaptor_vcgen<VertexSource, Generator, Markers> source_type; + typedef vertex_iterator<source_type> iterator; + iterator begin(unsigned id) { return iterator(*this, id); } + iterator end() { return iterator(path_cmd_stop); } + + private: + // Prohibit copying + conv_adaptor_vcgen(const conv_adaptor_vcgen<VertexSource, Generator, Markers>&); + const conv_adaptor_vcgen<VertexSource, Generator, Markers>& + operator = (const conv_adaptor_vcgen<VertexSource, Generator, Markers>&); + + VertexSource* m_source; + Generator m_generator; + Markers m_markers; + status m_status; + unsigned m_last_cmd; + double m_start_x; + double m_start_y; + }; + + + + + + //------------------------------------------------------------------------ + template<class VertexSource, class Generator, class Markers> + unsigned conv_adaptor_vcgen<VertexSource, Generator, Markers>::vertex(double* x, double* y) + { + unsigned cmd = path_cmd_stop; + bool done = false; + while(!done) + { + switch(m_status) + { + case initial: + m_markers.remove_all(); + m_last_cmd = m_source->vertex(&m_start_x, &m_start_y); + m_status = accumulate; + + case accumulate: + if(is_stop(m_last_cmd)) return path_cmd_stop; + + m_generator.remove_all(); + m_generator.add_vertex(m_start_x, m_start_y, path_cmd_move_to); + m_markers.add_vertex(m_start_x, m_start_y, path_cmd_move_to); + + for(;;) + { + cmd = m_source->vertex(x, y); + if(is_vertex(cmd)) + { + m_last_cmd = cmd; + if(is_move_to(cmd)) + { + m_start_x = *x; + m_start_y = *y; + break; + } + m_generator.add_vertex(*x, *y, cmd); + m_markers.add_vertex(*x, *y, path_cmd_line_to); + } + else + { + if(is_stop(cmd)) + { + m_last_cmd = path_cmd_stop; + break; + } + if(is_end_poly(cmd)) + { + m_generator.add_vertex(*x, *y, cmd); + break; + } + } + } + m_generator.rewind(0); + m_status = generate; + + case generate: + cmd = m_generator.vertex(x, y); + if(is_stop(cmd)) + { + m_status = accumulate; + break; + } + done = true; + break; + } + } + return cmd; + } + +} + +#endif |