1 files changed, 80 insertions, 0 deletions
diff --git a/cppcanvas/source/mtfrenderer/cachedprimitivebase.cxx b/cppcanvas/source/mtfrenderer/cachedprimitivebase.cxx
new file mode 100644
index 0000000000..e5664cabfc
--- /dev/null
+++ b/cppcanvas/source/mtfrenderer/cachedprimitivebase.cxx
@@ -0,0 +1,80 @@
+/* -*- 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: */