Initial checkin

git-svn-id: file:///srv/svn/repos/haiku/trunk/current@9933 a95241bf-73f2-0310-859d-f6bbb57e9c96
2004-11-12 02:02:58 +00:00
parent 5344cdf47b
commit 39241fe228
157 changed files with 50650 additions and 0 deletions
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+//----------------------------------------------------------------------------
+// Anti-Grain Geometry - Version 2.2
+// Copyright (C) 2002-2004 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: [email protected]
+//          [email protected]
+//          http://www.antigrain.com
+//----------------------------------------------------------------------------
+
+#ifndef AGG_CONV_CLOSE_POLYGON_INCLUDED
+#define AGG_CONV_CLOSE_POLYGON_INCLUDED
+
+#include "agg_basics.h"
+#include "agg_vertex_iterator.h"
+
+namespace agg
+{
+
+    //======================================================conv_close_polygon
+    template<class VertexSource> class conv_close_polygon
+    {
+    public:
+        conv_close_polygon(VertexSource& vs) : m_source(&vs) {}
+
+        void set_source(VertexSource& source) { m_source = &source; }
+
+        void rewind(unsigned path_id);
+        unsigned vertex(double* x, double* y);
+
+        typedef conv_close_polygon<VertexSource> source_type;
+        typedef vertex_iterator<source_type> iterator;
+        iterator begin(unsigned id) { return iterator(*this, id); }
+        iterator end() { return iterator(path_cmd_stop); }
+
+    private:
+        conv_close_polygon(const conv_close_polygon<VertexSource>&);
+        const conv_close_polygon<VertexSource>& 
+            operator = (const conv_close_polygon<VertexSource>&);
+
+        VertexSource* m_source;
+        unsigned      m_cmd[2];
+        double        m_x[2];
+        double        m_y[2];
+        unsigned      m_vertex;
+        bool          m_line_to;
+    };
+
+
+
+    //------------------------------------------------------------------------
+    template<class VertexSource> 
+    void conv_close_polygon<VertexSource>::rewind(unsigned path_id)
+    {
+        m_source->rewind(path_id);
+        m_vertex = 2;
+        m_line_to = false;
+    }
+
+
+    
+    //------------------------------------------------------------------------
+    template<class VertexSource> 
+    unsigned conv_close_polygon<VertexSource>::vertex(double* x, double* y)
+    {
+        unsigned cmd = path_cmd_stop;
+        for(;;)
+        {
+            if(m_vertex < 2)
+            {
+                *x = m_x[m_vertex];
+                *y = m_y[m_vertex];
+                cmd = m_cmd[m_vertex];
+                ++m_vertex;
+                break;
+            }
+
+            cmd = m_source->vertex(x, y);
+
+            if(is_end_poly(cmd))
+            {
+                cmd |= path_flags_close;
+                break;
+            }
+
+            if(is_stop(cmd))
+            {
+                if(m_line_to)
+                {
+                    m_cmd[0]  = path_cmd_end_poly | path_flags_close;
+                    m_cmd[1]  = path_cmd_stop;
+                    m_vertex  = 0;
+                    m_line_to = false;
+                    continue;
+                }
+                break;
+            }
+
+            if(is_move_to(cmd))
+            {
+                if(m_line_to)
+                {
+                    m_x[0]    = 0.0;
+                    m_y[0]    = 0.0;
+                    m_cmd[0]  = path_cmd_end_poly | path_flags_close;
+                    m_x[1]    = *x;
+                    m_y[1]    = *y;
+                    m_cmd[1]  = cmd;
+                    m_vertex  = 0;
+                    m_line_to = false;
+                    continue;
+                }
+                break;
+            }
+
+            if(is_vertex(cmd))
+            {
+                m_line_to = true;
+                break;
+            }
+        }
+        return cmd;
+    }
+
+}
+
+#endif