1 files changed, 66 insertions, 0 deletions
diff --git a/slideshow/source/engine/transitions/doublediamondwipe.cxx b/slideshow/source/engine/transitions/doublediamondwipe.cxx
new file mode 100644
index 000000000000..62a9f342ed86
--- /dev/null
+++ b/slideshow/source/engine/transitions/doublediamondwipe.cxx
@@ -0,0 +1,66 @@
+/*************************************************************************
+ *
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * Copyright 2000, 2010 Oracle and/or its affiliates.
+ *
+ * OpenOffice.org - a multi-platform office productivity suite
+ *
+ * This file is part of OpenOffice.org.
+ *
+ * OpenOffice.org is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License version 3
+ * only, as published by the Free Software Foundation.
+ *
+ * OpenOffice.org is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Lesser General Public License version 3 for more details
+ * (a copy is included in the LICENSE file that accompanied this code).
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * version 3 along with OpenOffice.org.  If not, see
+ * <http://www.openoffice.org/license.html>
+ * for a copy of the LGPLv3 License.
+ *
+ ************************************************************************/
+
+// MARKER(update_precomp.py): autogen include statement, do not remove
+#include "precompiled_slideshow.hxx"
+
+#include <canvas/debug.hxx>
+#include <basegfx/matrix/b2dhommatrix.hxx>
+#include <basegfx/point/b2dpoint.hxx>
+#include "doublediamondwipe.hxx"
+
+
+namespace slideshow {
+namespace internal {
+
+::basegfx::B2DPolyPolygon DoubleDiamondWipe::operator () ( double t )
+{
+    // outer:
+    const double a = ::basegfx::pruneScaleValue( 0.25 + (t * 0.75) );
+    ::basegfx::B2DPolygon poly;
+    poly.append( ::basegfx::B2DPoint( 0.5 + a, 0.5 ) );
+    poly.append( ::basegfx::B2DPoint( 0.5, 0.5 - a ) );
+    poly.append( ::basegfx::B2DPoint( 0.5 - a, 0.5 ) );
+    poly.append( ::basegfx::B2DPoint( 0.5, 0.5 + a ) );
+    poly.setClosed(true);
+    ::basegfx::B2DPolyPolygon res(poly);
+
+    // inner (reverse order to clip):
+    const double b = ::basegfx::pruneScaleValue( (1.0 - t) * 0.25 );
+    poly.clear();
+    poly.append( ::basegfx::B2DPoint( 0.5 + b, 0.5 ) );
+    poly.append( ::basegfx::B2DPoint( 0.5, 0.5 + b ) );
+    poly.append( ::basegfx::B2DPoint( 0.5 - b, 0.5 ) );
+    poly.append( ::basegfx::B2DPoint( 0.5, 0.5 - b ) );
+    poly.setClosed(true);
+    res.append(poly);
+
+    return res;
+}
+
+}
+}