147 lines
4.2 KiB
C++
147 lines
4.2 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_RASTERIZER_OUTLINE_INCLUDED
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#define AGG_RASTERIZER_OUTLINE_INCLUDED
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#include "agg_basics.h"
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namespace agg
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{
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//======================================================rasterizer_outline
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template<class Renderer> class rasterizer_outline
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{
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public:
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explicit rasterizer_outline(Renderer& ren) :
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m_ren(&ren),
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m_start_x(0),
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m_start_y(0),
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m_vertices(0)
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{}
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void attach(Renderer& ren) { m_ren = &ren; }
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//--------------------------------------------------------------------
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void move_to(int x, int y)
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{
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m_vertices = 1;
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m_ren->move_to(m_start_x = x, m_start_y = y);
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}
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//--------------------------------------------------------------------
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void line_to(int x, int y)
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{
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++m_vertices;
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m_ren->line_to(x, y);
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}
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//--------------------------------------------------------------------
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void move_to_d(double x, double y)
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{
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move_to(m_ren->coord(x), m_ren->coord(y));
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}
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//--------------------------------------------------------------------
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void line_to_d(double x, double y)
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{
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line_to(m_ren->coord(x), m_ren->coord(y));
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}
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//--------------------------------------------------------------------
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void close()
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{
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if(m_vertices > 2)
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{
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line_to(m_start_x, m_start_y);
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}
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m_vertices = 0;
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}
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//--------------------------------------------------------------------
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void add_vertex(double x, double y, unsigned cmd)
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{
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if(is_move_to(cmd))
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{
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move_to_d(x, y);
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}
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else
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{
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if(is_end_poly(cmd))
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{
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if(is_closed(cmd)) close();
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}
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else
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{
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line_to_d(x, y);
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}
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}
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}
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//--------------------------------------------------------------------
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template<class VertexSource>
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void add_path(VertexSource& vs, unsigned path_id=0)
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{
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double x;
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double y;
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unsigned cmd;
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vs.rewind(path_id);
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while(!is_stop(cmd = vs.vertex(&x, &y)))
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{
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add_vertex(x, y, cmd);
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}
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}
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//--------------------------------------------------------------------
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template<class VertexSource, class ColorStorage, class PathId>
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void render_all_paths(VertexSource& vs,
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const ColorStorage& colors,
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const PathId& path_id,
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unsigned num_paths)
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{
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for(unsigned i = 0; i < num_paths; i++)
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{
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m_ren->line_color(colors[i]);
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add_path(vs, path_id[i]);
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}
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}
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//--------------------------------------------------------------------
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template<class Ctrl> void render_ctrl(Ctrl& c)
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{
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unsigned i;
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for(i = 0; i < c.num_paths(); i++)
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{
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m_ren->line_color(c.color(i));
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add_path(c, i);
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}
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}
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private:
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Renderer* m_ren;
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int m_start_x;
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int m_start_y;
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unsigned m_vertices;
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};
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}
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#endif
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