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diff --git a/cppcanvas/source/mtfrenderer/cachedprimitivebase.cxx b/cppcanvas/source/mtfrenderer/cachedprimitivebase.cxx
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+/* -*- 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/rendering/RepaintResult.hpp>
+
+#include <basegfx/matrix/b2dhommatrix.hxx>
+#include <canvas/canvastools.hxx>
+#include <cppcanvas/canvas.hxx>
+
+#include "cachedprimitivebase.hxx"
+#include <sal/log.hxx>
+#include <utility>
+
+using namespace ::com::sun::star;
+
+namespace cppcanvas::internal
+{
+ CachedPrimitiveBase::CachedPrimitiveBase( CanvasSharedPtr xCanvas,
+ bool bOnlyRedrawWithSameTransform ) :
+ mpCanvas(std::move( xCanvas )),
+ mbOnlyRedrawWithSameTransform( bOnlyRedrawWithSameTransform )
+ {
+ // TODO(F2): also store last view transform, and refuse to
+ // redraw if changed.
+ }
+
+ bool CachedPrimitiveBase::render( const ::basegfx::B2DHomMatrix& rTransformation ) const
+ {
+ SAL_INFO( "cppcanvas.emf", "::cppcanvas::internal::CachedPrimitiveBase::render()" );
+ SAL_INFO( "cppcanvas.emf", "::cppcanvas::internal::CachedPrimitiveBase: 0x" << std::hex << this );
+
+ const rendering::ViewState& rViewState( mpCanvas->getViewState() );
+ ::basegfx::B2DHomMatrix aTotalTransform;
+
+ ::canvas::tools::getViewStateTransform( aTotalTransform,
+ rViewState );
+ aTotalTransform *= rTransformation;
+
+ // can we use the cached primitive? For that, it must be
+ // present in the first place, and, if
+ // mbOnlyRedrawWithSameTransform is true, the overall
+ // transformation must be the same.
+ if( mxCachedPrimitive.is() &&
+ (!mbOnlyRedrawWithSameTransform ||
+ maLastTransformation == aTotalTransform) )
+ {
+ if( mxCachedPrimitive->redraw( rViewState ) ==
+ rendering::RepaintResult::REDRAWN )
+ {
+ // cached repaint succeeded, done.
+ return true;
+ }
+ }
+
+ maLastTransformation = aTotalTransform;
+
+ // delegate rendering to derived classes
+ return renderPrimitive( mxCachedPrimitive,
+ rTransformation );
+ }
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */