1 files changed, 87 insertions, 0 deletions
diff --git a/cppcanvas/source/tools/canvasgraphichelper.cxx b/cppcanvas/source/tools/canvasgraphichelper.cxx
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+++ b/cppcanvas/source/tools/canvasgraphichelper.cxx
@@ -0,0 +1,87 @@
+/* -*- 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 <canvasgraphichelper.hxx>
+
+#include <com/sun/star/rendering/XCanvas.hpp>
+
+#include <canvas/canvastools.hxx>
+#include <basegfx/utils/canvastools.hxx>
+#include <basegfx/matrix/b2dhommatrix.hxx>
+#include <utility>
+
+
+using namespace ::com::sun::star;
+
+/* Implementation of CanvasGraphicHelper class */
+
+namespace cppcanvas::internal
+{
+        CanvasGraphicHelper::CanvasGraphicHelper( CanvasSharedPtr xParentCanvas ) :
+            mpCanvas(std::move( xParentCanvas ))
+        {
+            OSL_ENSURE( mpCanvas && mpCanvas->getUNOCanvas().is(),
+                        "CanvasGraphicHelper::CanvasGraphicHelper: no valid canvas" );
+
+            ::canvas::tools::initRenderState( maRenderState );
+        }
+
+        void CanvasGraphicHelper::setTransformation( const ::basegfx::B2DHomMatrix& rMatrix )
+        {
+            ::canvas::tools::setRenderStateTransform( maRenderState, rMatrix );
+        }
+
+        void CanvasGraphicHelper::setClip( const ::basegfx::B2DPolyPolygon& rClipPoly )
+        {
+            // TODO(T3): not thread-safe. B2DPolyPolygon employs copy-on-write
+            maClipPolyPolygon = rClipPoly;
+            maRenderState.Clip.clear();
+        }
+
+        void CanvasGraphicHelper::setClip()
+        {
+            maClipPolyPolygon.reset();
+            maRenderState.Clip.clear();
+        }
+
+        const rendering::RenderState& CanvasGraphicHelper::getRenderState() const
+        {
+            if( maClipPolyPolygon && !maRenderState.Clip.is() )
+            {
+                uno::Reference< rendering::XCanvas > xCanvas( mpCanvas->getUNOCanvas() );
+                if( !xCanvas.is() )
+                    return maRenderState;
+
+                maRenderState.Clip = ::basegfx::unotools::xPolyPolygonFromB2DPolyPolygon(
+                    xCanvas->getDevice(),
+                    *maClipPolyPolygon );
+            }
+
+            return maRenderState;
+        }
+
+        void CanvasGraphicHelper::setCompositeOp( sal_Int8 aOp )
+        {
+            maRenderState.CompositeOperation = aOp;
+        }
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */