Repo created

3party/agg/agg_rasterizer_outline.h

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+//----------------------------------------------------------------------------
+// Anti-Grain Geometry - Version 2.4
+// 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_RASTERIZER_OUTLINE_INCLUDED
+#define AGG_RASTERIZER_OUTLINE_INCLUDED
+
+#include "agg_basics.h"
+
+namespace agg
+{
+    //======================================================rasterizer_outline
+    template<class Renderer> class rasterizer_outline
+    {
+    public:
+        explicit rasterizer_outline(Renderer& ren) : 
+            m_ren(&ren), 
+            m_start_x(0), 
+            m_start_y(0), 
+            m_vertices(0)
+        {}
+        void attach(Renderer& ren) { m_ren = &ren; }
+
+
+        //--------------------------------------------------------------------
+        void move_to(int x, int y)
+        {
+            m_vertices = 1;
+            m_ren->move_to(m_start_x = x, m_start_y = y);
+        }
+
+        //--------------------------------------------------------------------
+        void line_to(int x, int y)
+        {
+            ++m_vertices;
+            m_ren->line_to(x, y);
+        }
+
+        //--------------------------------------------------------------------
+        void move_to_d(double x, double y)
+        {
+            move_to(m_ren->coord(x), m_ren->coord(y));
+        }
+
+        //--------------------------------------------------------------------
+        void line_to_d(double x, double y)
+        {
+            line_to(m_ren->coord(x), m_ren->coord(y));
+        }
+
+        //--------------------------------------------------------------------
+        void close()
+        {
+            if(m_vertices > 2)
+            {
+                line_to(m_start_x, m_start_y);
+            }
+            m_vertices = 0;
+        }
+
+        //--------------------------------------------------------------------
+        void add_vertex(double x, double y, unsigned cmd)
+        {
+            if(is_move_to(cmd)) 
+            {
+                move_to_d(x, y);
+            }
+            else 
+            {
+                if(is_end_poly(cmd))
+                {
+                    if(is_closed(cmd)) close();
+                }
+                else
+                {
+                    line_to_d(x, y);
+                }
+            }
+        }
+
+
+        //--------------------------------------------------------------------
+        template<class VertexSource>
+        void add_path(VertexSource& vs, unsigned path_id=0)
+        {
+            double x;
+            double y;
+
+            unsigned cmd;
+            vs.rewind(path_id);
+            while(!is_stop(cmd = vs.vertex(&x, &y)))
+            {
+                add_vertex(x, y, cmd);
+            }
+        }
+
+
+        //--------------------------------------------------------------------
+        template<class VertexSource, class ColorStorage, class PathId>
+        void render_all_paths(VertexSource& vs, 
+                              const ColorStorage& colors, 
+                              const PathId& path_id,
+                              unsigned num_paths)
+        {
+            for(unsigned i = 0; i < num_paths; i++)
+            {
+                m_ren->line_color(colors[i]);
+                add_path(vs, path_id[i]);
+            }
+        }
+
+
+        //--------------------------------------------------------------------
+        template<class Ctrl> void render_ctrl(Ctrl& c)
+        {
+            unsigned i;
+            for(i = 0; i < c.num_paths(); i++)
+            {
+                m_ren->line_color(c.color(i));
+                add_path(c, i);
+            }
+        }
+
+
+    private:
+        Renderer* m_ren;
+        int       m_start_x;
+        int       m_start_y;
+        unsigned  m_vertices;
+    };
+
+
+}
+
+
+#endif
+