1 files changed, 164 insertions, 0 deletions
diff --git a/agg/source/agg_rounded_rect.cpp b/agg/source/agg_rounded_rect.cpp
new file mode 100755
index 000000000000..8f6e532e7096
--- /dev/null
+++ b/agg/source/agg_rounded_rect.cpp
@@ -0,0 +1,164 @@
+//----------------------------------------------------------------------------
+// Anti-Grain Geometry - Version 2.3
+// 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
+//----------------------------------------------------------------------------
+//
+// Rounded rectangle vertex generator
+//
+//----------------------------------------------------------------------------
+
+#include <math.h>
+#include "agg_rounded_rect.h"
+
+
+namespace agg
+{
+    //------------------------------------------------------------------------
+    rounded_rect::rounded_rect(double x1, double y1, double x2, double y2, double r) :
+        m_x1(x1), m_y1(y1), m_x2(x2), m_y2(y2),
+        m_rx1(r), m_ry1(r), m_rx2(r), m_ry2(r),
+        m_rx3(r), m_ry3(r), m_rx4(r), m_ry4(r)
+    {
+        if(x1 > x2) { m_x1 = x2; m_x2 = x1; }
+        if(y1 > y2) { m_y1 = y2; m_y2 = y1; }
+    }
+
+    //--------------------------------------------------------------------
+    void rounded_rect::rect(double x1, double y1, double x2, double y2)
+    {
+        m_x1 = x1;
+        m_y1 = y1;
+        m_x2 = x2;
+        m_y2 = y2;
+        if(x1 > x2) { m_x1 = x2; m_x2 = x1; }
+        if(y1 > y2) { m_y1 = y2; m_y2 = y1; }
+    }
+
+    //--------------------------------------------------------------------
+    void rounded_rect::radius(double r)
+    {
+        m_rx1 = m_ry1 = m_rx2 = m_ry2 = m_rx3 = m_ry3 = m_rx4 = m_ry4 = r;
+    }
+
+    //--------------------------------------------------------------------
+    void rounded_rect::radius(double rx, double ry)
+    {
+        m_rx1 = m_rx2 = m_rx3 = m_rx4 = rx;
+        m_ry1 = m_ry2 = m_ry3 = m_ry4 = ry;
+    }
+
+    //--------------------------------------------------------------------
+    void rounded_rect::radius(double rx_bottom, double ry_bottom,
+                              double rx_top,    double ry_top)
+    {
+        m_rx1 = m_rx2 = rx_bottom;
+        m_rx3 = m_rx4 = rx_top;
+        m_ry1 = m_ry2 = ry_bottom;
+        m_ry3 = m_ry4 = ry_top;
+    }
+
+    //--------------------------------------------------------------------
+    void rounded_rect::radius(double rx1, double ry1, double rx2, double ry2,
+                              double rx3, double ry3, double rx4, double ry4)
+    {
+        m_rx1 = rx1; m_ry1 = ry1; m_rx2 = rx2; m_ry2 = ry2;
+        m_rx3 = rx3; m_ry3 = ry3; m_rx4 = rx4; m_ry4 = ry4;
+    }
+
+    //--------------------------------------------------------------------
+    void rounded_rect::normalize_radius()
+    {
+        double dx = fabs(m_y2 - m_y1);
+        double dy = fabs(m_x2 - m_x1);
+
+        double k = 1.0;
+        double t;
+        t = dx / (m_rx1 + m_rx2); if(t < k) k = t;
+        t = dx / (m_rx3 + m_rx4); if(t < k) k = t;
+        t = dy / (m_ry1 + m_ry2); if(t < k) k = t;
+        t = dy / (m_ry3 + m_ry4); if(t < k) k = t;
+
+        if(k < 1.0)
+        {
+            m_rx1 *= k; m_ry1 *= k; m_rx2 *= k; m_ry2 *= k;
+            m_rx3 *= k; m_ry3 *= k; m_rx4 *= k; m_ry4 *= k;
+        }
+    }
+
+    //--------------------------------------------------------------------
+    void rounded_rect::rewind(unsigned)
+    {
+        m_status = 0;
+    }
+
+    //--------------------------------------------------------------------
+    unsigned rounded_rect::vertex(double* x, double* y)
+    {
+        unsigned cmd = path_cmd_stop;
+        switch(m_status)
+        {
+        case 0:
+            m_arc.init(m_x1 + m_rx1, m_y1 + m_ry1, m_rx1, m_ry1,
+                       pi, pi+pi*0.5);
+            m_arc.rewind(0);
+            m_status++;
+
+        case 1:
+            cmd = m_arc.vertex(x, y);
+            if(is_stop(cmd)) m_status++;
+            else return cmd;
+
+        case 2:
+            m_arc.init(m_x2 - m_rx2, m_y1 + m_ry2, m_rx2, m_ry2,
+                       pi+pi*0.5, 0.0);
+            m_arc.rewind(0);
+            m_status++;
+
+        case 3:
+            cmd = m_arc.vertex(x, y);
+            if(is_stop(cmd)) m_status++;
+            else return path_cmd_line_to;
+
+        case 4:
+            m_arc.init(m_x2 - m_rx3, m_y2 - m_ry3, m_rx3, m_ry3,
+                       0.0, pi*0.5);
+            m_arc.rewind(0);
+            m_status++;
+
+        case 5:
+            cmd = m_arc.vertex(x, y);
+            if(is_stop(cmd)) m_status++;
+            else return path_cmd_line_to;
+
+        case 6:
+            m_arc.init(m_x1 + m_rx4, m_y2 - m_ry4, m_rx4, m_ry4,
+                       pi*0.5, pi);
+            m_arc.rewind(0);
+            m_status++;
+
+        case 7:
+            cmd = m_arc.vertex(x, y);
+            if(is_stop(cmd)) m_status++;
+            else return path_cmd_line_to;
+
+        case 8:
+            cmd = (unsigned)path_cmd_end_poly | (unsigned)path_flags_close | (unsigned)path_flags_ccw;
+            m_status++;
+            break;
+        }
+        return cmd;
+    }
+
+
+}
+