1 files changed, 74 insertions, 0 deletions
diff --git a/slideshow/source/engine/transitions/fourboxwipe.cxx b/slideshow/source/engine/transitions/fourboxwipe.cxx
new file mode 100644
index 000000000..74833c2e0
--- /dev/null
+++ b/slideshow/source/engine/transitions/fourboxwipe.cxx
@@ -0,0 +1,74 @@
+/* -*- 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/b2dhommatrix.hxx>
+#include <basegfx/polygon/b2dpolypolygon.hxx>
+#include <basegfx/numeric/ftools.hxx>
+#include <basegfx/matrix/b2dhommatrixtools.hxx>
+#include "fourboxwipe.hxx"
+
+
+namespace slideshow::internal {
+
+::basegfx::B2DPolyPolygon FourBoxWipe::operator () ( double t )
+{
+    ::basegfx::B2DHomMatrix aTransform;
+    const double d = ::basegfx::pruneScaleValue( t / 2.0 );
+    if (m_cornersOut)
+    {
+        aTransform = basegfx::utils::createTranslateB2DHomMatrix(-0.5, -0.5);
+        aTransform = basegfx::utils::createScaleTranslateB2DHomMatrix(d, d, -0.25, -0.25)
+            * aTransform;
+    }
+    else
+    {
+        aTransform = basegfx::utils::createScaleTranslateB2DHomMatrix(d, d, -0.5, -0.5);
+    }
+
+    // top left:
+    ::basegfx::B2DPolygon square( m_unitRect );
+    square.transform( aTransform );
+    ::basegfx::B2DPolyPolygon res( square );
+    // bottom left, flip on x-axis:
+    aTransform.scale( -1.0, 1.0 );
+    ::basegfx::B2DPolygon square2( m_unitRect );
+    square2.transform( aTransform );
+    square2.flip(); // flip direction
+    res.append( square2 );
+    // bottom right, flip on y-axis:
+    aTransform.scale( 1.0, -1.0 );
+    ::basegfx::B2DPolygon square3( m_unitRect );
+    square3.transform( aTransform );
+    res.append( square3 );
+    // top right, flip on x-axis:
+    aTransform.scale( -1.0, 1.0 );
+    ::basegfx::B2DPolygon square4( m_unitRect );
+    square4.transform( aTransform );
+    square4.flip(); // flip direction
+    res.append( square4 );
+
+    aTransform = basegfx::utils::createTranslateB2DHomMatrix(0.5, 0.5);
+    res.transform( aTransform );
+    return res;
+}
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */