100 lines
2.8 KiB
C
100 lines
2.8 KiB
C
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//----------------------------------------------------------------------------
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// Anti-Grain Geometry - Version 2.2
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// Copyright (C) 2002-2004 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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//
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// Line dash generator
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//
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//----------------------------------------------------------------------------
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#ifndef AGG_VCGEN_DASH_INCLUDED
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#define AGG_VCGEN_DASH_INCLUDED
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#include "agg_basics.h"
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#include "agg_vertex_sequence.h"
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#include "agg_vertex_iterator.h"
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namespace agg
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{
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//---------------------------------------------------------------vcgen_dash
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//
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// See Implementation agg_vcgen_dash.cpp
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//
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class vcgen_dash
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{
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enum
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{
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max_dashes = 32
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};
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enum status_e
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{
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initial,
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ready,
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polyline,
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stop
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};
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public:
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typedef vertex_sequence<vertex_dist, 6> vertex_storage;
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vcgen_dash();
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void remove_all_dashes();
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void add_dash(double dash_len, double gap_len);
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void dash_start(double ds);
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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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// 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 id);
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unsigned vertex(double* x, double* y);
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typedef vcgen_dash source_type;
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typedef vertex_iterator<source_type> iterator;
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iterator begin(unsigned id) { return iterator(*this, id); }
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iterator end() { return iterator(path_cmd_stop); }
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private:
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vcgen_dash(const vcgen_dash&);
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const vcgen_dash& operator = (const vcgen_dash&);
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void calc_dash_start(double ds);
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double m_dashes[max_dashes];
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double m_total_dash_len;
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unsigned m_num_dashes;
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double m_dash_start;
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double m_shorten;
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double m_curr_dash_start;
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unsigned m_curr_dash;
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double m_curr_rest;
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const vertex_dist* m_v1;
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const vertex_dist* m_v2;
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vertex_storage m_src_vertices;
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unsigned m_closed;
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status_e m_status;
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unsigned m_src_vertex;
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};
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}
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#endif
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