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+//----------------------------------------------------------------------------
+// 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
+//----------------------------------------------------------------------------
+
+#include <math.h>
+#include "agg_trans_warp_magnifier.h"
+
+namespace agg
+{
+
+ //------------------------------------------------------------------------
+ void trans_warp_magnifier::transform(double* x, double* y) const
+ {
+ double dx = *x - m_xc;
+ double dy = *y - m_yc;
+ double r = sqrt(dx * dx + dy * dy);
+ if(r < m_radius)
+ {
+ *x = m_xc + dx * m_magn;
+ *y = m_yc + dy * m_magn;
+ return;
+ }
+
+ double m = (r + m_radius * (m_magn - 1.0)) / r;
+ *x = m_xc + dx * m;
+ *y = m_yc + dy * m;
+ }
+
+ //------------------------------------------------------------------------
+ void trans_warp_magnifier::inverse_transform(double* x, double* y) const
+ {
+ trans_warp_magnifier t(*this);
+ t.magnification(1.0 / m_magn);
+ t.radius(m_radius * m_magn);
+ t.transform(x, y);
+ }
+
+
+}