1 files changed, 137 insertions, 0 deletions
diff --git a/drawinglayer/source/tools/converters.cxx b/drawinglayer/source/tools/converters.cxx
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index 000000000000..33b1fe4acd7f
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+++ b/drawinglayer/source/tools/converters.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 <drawinglayer/tools/converters.hxx>
+#include <drawinglayer/geometry/viewinformation2d.hxx>
+#include <drawinglayer/processor2d/vclpixelprocessor2d.hxx>
+#include <drawinglayer/primitive2d/modifiedcolorprimitive2d.hxx>
+#include <basegfx/matrix/b2dhommatrixtools.hxx>
+#include <drawinglayer/primitive2d/transformprimitive2d.hxx>
+#include <vcl/virdev.hxx>
+
+#ifdef DBG_UTIL
+#include <tools/stream.hxx>
+#endif
+
+//////////////////////////////////////////////////////////////////////////////
+
+namespace drawinglayer
+{
+    namespace tools
+    {
+        BitmapEx DRAWINGLAYER_DLLPUBLIC convertToBitmapEx(
+            const drawinglayer::primitive2d::Primitive2DSequence& rSeq,
+            const geometry::ViewInformation2D& rViewInformation2D,
+            sal_uInt32 nDiscreteWidth,
+            sal_uInt32 nDiscreteHeight,
+            sal_uInt32 nMaxQuadratPixels)
+        {
+            BitmapEx aRetval;
+
+            if(rSeq.hasElements() && nDiscreteWidth && nDiscreteHeight)
+            {
+                // get destination size in pixels
+                const MapMode aMapModePixel(MAP_PIXEL);
+                const sal_uInt32 nViewVisibleArea(nDiscreteWidth * nDiscreteHeight);
+                double fReduceFactor(1.0);
+                drawinglayer::primitive2d::Primitive2DSequence aSequence(rSeq);
+
+                if(nViewVisibleArea > nMaxQuadratPixels)
+                {
+                    // reduce render size
+                    fReduceFactor = sqrt((double)nMaxQuadratPixels / (double)nViewVisibleArea);
+                    nDiscreteWidth = basegfx::fround((double)nDiscreteWidth * fReduceFactor);
+                    nDiscreteHeight = basegfx::fround((double)nDiscreteHeight * fReduceFactor);
+
+                    const drawinglayer::primitive2d::Primitive2DReference aEmbed(
+                        new drawinglayer::primitive2d::TransformPrimitive2D(
+                            basegfx::tools::createScaleB2DHomMatrix(fReduceFactor, fReduceFactor),
+                            rSeq));
+
+                    aSequence = drawinglayer::primitive2d::Primitive2DSequence(&aEmbed, 1);
+                }
+
+                const Point aEmptyPoint;
+                const Size aSizePixel(nDiscreteWidth, nDiscreteHeight);
+                geometry::ViewInformation2D aViewInformation2D(rViewInformation2D);
+                VirtualDevice maContent;
+
+                // prepare vdev
+                maContent.SetOutputSizePixel(aSizePixel, false);
+                maContent.SetMapMode(aMapModePixel);
+                maContent.SetAntialiasing(true);
+
+                // set to all white
+                maContent.SetBackground(Wallpaper(Color(COL_WHITE)));
+                maContent.Erase();
+
+                // create processor
+                processor2d::VclPixelProcessor2D aContentProcessor(aViewInformation2D, maContent);
+
+                // render content
+                aContentProcessor.process(aSequence);
+
+                // get content
+                maContent.EnableMapMode(false);
+                const Bitmap aContent(maContent.GetBitmap(aEmptyPoint, aSizePixel));
+
+                // prepare for mask creation
+                maContent.SetMapMode(aMapModePixel);
+                maContent.SetAntialiasing(true);
+
+                // set alpha to all white (fully transparent)
+                maContent.Erase();
+
+                // embed primitives to paint them black
+                const primitive2d::Primitive2DReference xRef(
+                    new primitive2d::ModifiedColorPrimitive2D(
+                        aSequence,
+                        basegfx::BColorModifier(
+                            basegfx::BColor(0.0, 0.0, 0.0),
+                            0.5,
+                            basegfx::BCOLORMODIFYMODE_REPLACE)));
+                const primitive2d::Primitive2DSequence xSeq(&xRef, 1);
+
+                // render
+                aContentProcessor.process(xSeq);
+
+                // get alpha cahannel from vdev
+                maContent.EnableMapMode(false);
+                const AlphaMask aAlphaMask(maContent.GetBitmap(aEmptyPoint, aSizePixel));
+
+                // create BitmapEx result
+                aRetval = BitmapEx(aContent, aAlphaMask);
+            }
+
+#ifdef DBG_UTIL
+            static bool bDoSaveForVisualControl(false);
+            if(bDoSaveForVisualControl)
+            {
+                SvFileStream aNew(rtl::OUString("c:\\test.png"), STREAM_WRITE|STREAM_TRUNC);
+                aNew << aRetval;
+            }
+#endif
+
+            return aRetval;
+        }
+
+    } // end of namespace tools
+} // end of namespace drawinglayer
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */