136 lines
3.7 KiB
C++
136 lines
3.7 KiB
C++
//----------------------------------------------------------------------------
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// Anti-Grain Geometry - Version 2.4
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// Copyright (C) 2002-2005 Maxim Shemanarev (http://www.antigrain.com)
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//
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// Permission to copy, use, modify, sell and distribute this software
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// is granted provided this copyright notice appears in all copies.
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// This software is provided "as is" without express or implied
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// warranty, and with no claim as to its suitability for any purpose.
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//
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//----------------------------------------------------------------------------
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// Contact: mcseem@antigrain.com
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// mcseemagg@yahoo.com
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// http://www.antigrain.com
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//----------------------------------------------------------------------------
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#ifndef AGG_VCGEN_VERTEX_SEQUENCE_INCLUDED
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#define AGG_VCGEN_VERTEX_SEQUENCE_INCLUDED
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#include "agg_basics.h"
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#include "agg_vertex_sequence.h"
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#include "agg_shorten_path.h"
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namespace agg
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{
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//===================================================vcgen_vertex_sequence
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class vcgen_vertex_sequence
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{
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public:
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typedef vertex_dist_cmd vertex_type;
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typedef vertex_sequence<vertex_type, 6> vertex_storage;
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vcgen_vertex_sequence() :
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m_flags(0),
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m_cur_vertex(0),
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m_shorten(0.0),
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m_ready(false)
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{
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}
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// Vertex Generator Interface
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void remove_all();
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void add_vertex(double x, double y, unsigned cmd);
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// Vertex Source Interface
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void rewind(unsigned path_id);
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unsigned vertex(double* x, double* y);
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void shorten(double s) { m_shorten = s; }
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double shorten() const { return m_shorten; }
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private:
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vcgen_vertex_sequence(const vcgen_vertex_sequence&);
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const vcgen_vertex_sequence& operator = (const vcgen_vertex_sequence&);
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vertex_storage m_src_vertices;
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unsigned m_flags;
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unsigned m_cur_vertex;
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double m_shorten;
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bool m_ready;
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};
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//------------------------------------------------------------------------
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inline void vcgen_vertex_sequence::remove_all()
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{
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m_ready = false;
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m_src_vertices.remove_all();
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m_cur_vertex = 0;
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m_flags = 0;
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}
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//------------------------------------------------------------------------
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inline void vcgen_vertex_sequence::add_vertex(double x, double y, unsigned cmd)
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{
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m_ready = false;
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if(is_move_to(cmd))
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{
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m_src_vertices.modify_last(vertex_dist_cmd(x, y, cmd));
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}
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else
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{
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if(is_vertex(cmd))
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{
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m_src_vertices.add(vertex_dist_cmd(x, y, cmd));
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}
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else
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{
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m_flags = cmd & path_flags_mask;
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}
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}
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}
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//------------------------------------------------------------------------
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inline void vcgen_vertex_sequence::rewind(unsigned)
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{
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if(!m_ready)
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{
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m_src_vertices.close(is_closed(m_flags));
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shorten_path(m_src_vertices, m_shorten, get_close_flag(m_flags));
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}
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m_ready = true;
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m_cur_vertex = 0;
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}
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//------------------------------------------------------------------------
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inline unsigned vcgen_vertex_sequence::vertex(double* x, double* y)
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{
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if(!m_ready)
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{
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rewind(0);
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}
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if(m_cur_vertex == m_src_vertices.size())
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{
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++m_cur_vertex;
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return path_cmd_end_poly | m_flags;
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}
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if(m_cur_vertex > m_src_vertices.size())
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{
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return path_cmd_stop;
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}
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vertex_type& v = m_src_vertices[m_cur_vertex++];
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*x = v.x;
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*y = v.y;
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return v.cmd;
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}
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}
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#endif
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