1 files changed, 65 insertions, 0 deletions
diff --git a/slideshow/source/engine/transitions/checkerboardwipe.cxx b/slideshow/source/engine/transitions/checkerboardwipe.cxx
new file mode 100644
index 000000000000..630c046d438f
--- /dev/null
+++ b/slideshow/source/engine/transitions/checkerboardwipe.cxx
@@ -0,0 +1,65 @@
+/*************************************************************************
+ *
+ * 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 "checkerboardwipe.hxx"
+
+
+namespace slideshow {
+namespace internal {
+
+::basegfx::B2DPolyPolygon CheckerBoardWipe::operator () ( double t )
+{
+    const double d = (1.0 / m_unitsPerEdge);
+    ::basegfx::B2DHomMatrix aTransform;
+    aTransform.scale( ::basegfx::pruneScaleValue( d * 2.0 * t ),
+                      ::basegfx::pruneScaleValue( d ) );
+
+    ::basegfx::B2DPolyPolygon res;
+    for ( sal_Int32 i = m_unitsPerEdge; i--; )
+    {
+        ::basegfx::B2DHomMatrix transform( aTransform );
+        if ((i % 2) == 1) // odd line
+            transform.translate( -d, 0.0 );
+        for ( sal_Int32 j = (m_unitsPerEdge / 2) + 1; j--; )
+        {
+            ::basegfx::B2DPolyPolygon poly( m_unitRect );
+            poly.transform( transform );
+            res.append( poly );
+            transform.translate( d * 2.0, 0.0 );
+        }
+        aTransform.translate( 0.0, d ); // next line
+    }
+    return res;
+}
+
+}
+}