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Diffstat (limited to 'agg/inc/agg_vcgen_vertex_sequence.h')
-rwxr-xr-x | agg/inc/agg_vcgen_vertex_sequence.h | 135 |
1 files changed, 135 insertions, 0 deletions
diff --git a/agg/inc/agg_vcgen_vertex_sequence.h b/agg/inc/agg_vcgen_vertex_sequence.h new file mode 100755 index 000000000000..7c4e9e4253e5 --- /dev/null +++ b/agg/inc/agg_vcgen_vertex_sequence.h @@ -0,0 +1,135 @@ +//---------------------------------------------------------------------------- +// 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_VCGEN_VERTEX_SEQUENCE_INCLUDED +#define AGG_VCGEN_VERTEX_SEQUENCE_INCLUDED + +#include "agg_basics.h" +#include "agg_vertex_sequence.h" +#include "agg_shorten_path.h" + +namespace agg +{ + + //===================================================vcgen_vertex_sequence + class vcgen_vertex_sequence + { + public: + typedef vertex_dist_cmd vertex_type; + typedef vertex_sequence<vertex_type, 6> vertex_storage; + + vcgen_vertex_sequence() : + m_flags(0), + m_cur_vertex(0), + m_shorten(0.0), + m_ready(false) + { + } + + // Vertex Generator Interface + void remove_all(); + void add_vertex(double x, double y, unsigned cmd); + + // Vertex Source Interface + void rewind(unsigned id); + unsigned vertex(double* x, double* y); + + void shorten(double s) { m_shorten = s; } + double shorten() const { return m_shorten; } + + private: + vcgen_vertex_sequence(const vcgen_vertex_sequence&); + const vcgen_vertex_sequence& operator = (const vcgen_vertex_sequence&); + + vertex_storage m_src_vertices; + unsigned m_flags; + unsigned m_cur_vertex; + double m_shorten; + bool m_ready; + }; + + + //------------------------------------------------------------------------ + inline void vcgen_vertex_sequence::remove_all() + { + m_ready = false; + m_src_vertices.remove_all(); + m_cur_vertex = 0; + m_flags = 0; + } + + //------------------------------------------------------------------------ + inline void vcgen_vertex_sequence::add_vertex(double x, double y, unsigned cmd) + { + m_ready = false; + if(is_move_to(cmd)) + { + m_src_vertices.modify_last(vertex_dist_cmd(x, y, cmd)); + } + else + { + if(is_vertex(cmd)) + { + m_src_vertices.add(vertex_dist_cmd(x, y, cmd)); + } + else + { + m_flags = cmd & path_flags_mask; + } + } + } + + + //------------------------------------------------------------------------ + inline void vcgen_vertex_sequence::rewind(unsigned) + { + if(!m_ready) + { + m_src_vertices.close(is_closed(m_flags)); + shorten_path(m_src_vertices, m_shorten, get_close_flag(m_flags)); + } + m_ready = true; + m_cur_vertex = 0; + } + + //------------------------------------------------------------------------ + inline unsigned vcgen_vertex_sequence::vertex(double* x, double* y) + { + if(!m_ready) + { + rewind(0); + } + + if(m_cur_vertex == m_src_vertices.size()) + { + ++m_cur_vertex; + return path_cmd_end_poly | m_flags; + } + + if(m_cur_vertex > m_src_vertices.size()) + { + return path_cmd_stop; + } + + vertex_type& v = m_src_vertices[m_cur_vertex++]; + *x = v.x; + *y = v.y; + return v.cmd; + } + + +} + +#endif |