1 files changed, 60 insertions, 0 deletions
diff --git a/slideshow/source/engine/transitions/fanwipe.cxx b/slideshow/source/engine/transitions/fanwipe.cxx
new file mode 100644
index 000000000..b86b0def2
--- /dev/null
+++ b/slideshow/source/engine/transitions/fanwipe.cxx
@@ -0,0 +1,60 @@
+/* -*- 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 <basegfx/matrix/b2dhommatrixtools.hxx>
+#include <sal/log.hxx>
+#include "transitiontools.hxx"
+#include "clockwipe.hxx"
+#include "fanwipe.hxx"
+
+
+namespace slideshow::internal {
+
+::basegfx::B2DPolyPolygon FanWipe::operator () ( double t )
+{
+    ::basegfx::B2DPolyPolygon res;
+    ::basegfx::B2DPolygon poly(
+        ClockWipe::calcCenteredClock(
+            t / ((m_center && m_single) ? 2.0 : 4.0) ) );
+
+    res.append( poly );
+    // flip on y-axis:
+    poly.transform(basegfx::utils::createScaleB2DHomMatrix(-1.0, 1.0));
+    poly.flip();
+    res.append( poly );
+
+    if (m_center)
+    {
+        res.transform(basegfx::utils::createScaleTranslateB2DHomMatrix(0.5, 0.5, 0.5, 0.5));
+
+        if (! m_single)
+            res.append( flipOnXAxis(res) );
+    }
+    else
+    {
+        SAL_WARN_IF( m_fanIn, "slideshow.opengl", "FanWipe: m_fanIn is true ?" );
+        res.transform(basegfx::utils::createScaleTranslateB2DHomMatrix(0.5, 1.0, 0.5, 1.0));
+    }
+    return res;
+}
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */