1 files changed, 51 insertions, 0 deletions
diff --git a/slideshow/source/engine/transitions/ellipsewipe.cxx b/slideshow/source/engine/transitions/ellipsewipe.cxx
new file mode 100644
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+++ b/slideshow/source/engine/transitions/ellipsewipe.cxx
@@ -0,0 +1,51 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#include <com/sun/star/animations/TransitionSubType.hpp>
+#include <basegfx/numeric/ftools.hxx>
+#include <basegfx/polygon/b2dpolygontools.hxx>
+#include "ellipsewipe.hxx"
+
+
+namespace slideshow::internal {
+
+::basegfx::B2DPolyPolygon EllipseWipe::operator () ( double t )
+{
+    ::basegfx::B2DPoint rCenter(0.5,0.5);
+    double fRadius = ::basegfx::pruneScaleValue( t * M_SQRT2 / 2.0 );
+
+    if( mnSubType == com::sun::star::animations::TransitionSubType::VERTICAL )
+    {
+        // oval:
+        ::basegfx::B2DPolygon poly (
+            ::basegfx::utils::createPolygonFromEllipse( rCenter, fRadius*2, fRadius ) ); //Horizontal Ellipse is rotated by 90 degrees
+        return ::basegfx::B2DPolyPolygon( poly );
+    }
+    else
+    {
+         // circle:
+        ::basegfx::B2DPolygon poly(
+            ::basegfx::utils::createPolygonFromCircle( rCenter, fRadius ) );
+        return ::basegfx::B2DPolyPolygon( poly );
+    }
+}
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */