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Diffstat (limited to 'drawinglayer/source/tools/converters.cxx')
| -rw-r--r-- | drawinglayer/source/tools/converters.cxx | 176 |
1 files changed, 176 insertions, 0 deletions
diff --git a/drawinglayer/source/tools/converters.cxx b/drawinglayer/source/tools/converters.cxx new file mode 100644 index 000000000..ff9b79a68 --- /dev/null +++ b/drawinglayer/source/tools/converters.cxx @@ -0,0 +1,176 @@ +/* -*- 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/geometry/viewinformation2d.hxx> +#include <drawinglayer/primitive2d/modifiedcolorprimitive2d.hxx> +#include <basegfx/matrix/b2dhommatrixtools.hxx> +#include <drawinglayer/primitive2d/transformprimitive2d.hxx> +#include <drawinglayer/processor2d/baseprocessor2d.hxx> +#include <drawinglayer/processor2d/processor2dtools.hxx> +#include <vcl/virdev.hxx> + +#include <converters.hxx> + +#ifdef DBG_UTIL +#include <tools/stream.hxx> +#include <vcl/pngwrite.hxx> +#endif + +namespace drawinglayer +{ + + BitmapEx convertToBitmapEx( + const drawinglayer::primitive2d::Primitive2DContainer& rSeq, + const geometry::ViewInformation2D& rViewInformation2D, + sal_uInt32 nDiscreteWidth, + sal_uInt32 nDiscreteHeight, + sal_uInt32 nMaxQuadratPixels) + { + BitmapEx aRetval; + + if(!rSeq.empty() && nDiscreteWidth && nDiscreteHeight) + { + // get destination size in pixels + const MapMode aMapModePixel(MapUnit::MapPixel); + const sal_uInt32 nViewVisibleArea(nDiscreteWidth * nDiscreteHeight); + drawinglayer::primitive2d::Primitive2DContainer aSequence(rSeq); + + if(nViewVisibleArea > nMaxQuadratPixels) + { + // reduce render size + double fReduceFactor = sqrt(static_cast<double>(nMaxQuadratPixels) / static_cast<double>(nViewVisibleArea)); + nDiscreteWidth = basegfx::fround(static_cast<double>(nDiscreteWidth) * fReduceFactor); + nDiscreteHeight = basegfx::fround(static_cast<double>(nDiscreteHeight) * fReduceFactor); + + const drawinglayer::primitive2d::Primitive2DReference aEmbed( + new drawinglayer::primitive2d::TransformPrimitive2D( + basegfx::utils::createScaleB2DHomMatrix(fReduceFactor, fReduceFactor), + rSeq)); + + aSequence = drawinglayer::primitive2d::Primitive2DContainer { aEmbed }; + } + + const Point aEmptyPoint; + const Size aSizePixel(nDiscreteWidth, nDiscreteHeight); + ScopedVclPtrInstance< VirtualDevice > pContent; + + // prepare vdev + pContent->SetOutputSizePixel(aSizePixel, false); + pContent->SetMapMode(aMapModePixel); + + // set to all white + pContent->SetBackground(Wallpaper(COL_WHITE)); + pContent->Erase(); + + // create pixel processor, also already takes care of AAing and + // checking the getOptionsDrawinglayer().IsAntiAliasing() switch. If + // not wanted, change after this call as needed + std::unique_ptr<processor2d::BaseProcessor2D> pContentProcessor = processor2d::createPixelProcessor2DFromOutputDevice( + *pContent, + rViewInformation2D); + + if(pContentProcessor) + { +#ifdef DBG_UTIL + static bool bDoSaveForVisualControl(false); // loplugin:constvars:ignore +#endif + // render content + pContentProcessor->process(aSequence); + + // get content + pContent->EnableMapMode(false); + const Bitmap aContent(pContent->GetBitmap(aEmptyPoint, aSizePixel)); + +#ifdef DBG_UTIL + if(bDoSaveForVisualControl) + { + SvFileStream aNew( +#ifdef _WIN32 + "c:\\test_content.png" +#else + "~/test_content.png" +#endif + , StreamMode::WRITE|StreamMode::TRUNC); + BitmapEx aContentEx(aContent); + vcl::PNGWriter aPNGWriter(aContentEx); + aPNGWriter.Write(aNew); + } +#endif + // prepare for mask creation + pContent->SetMapMode(aMapModePixel); + + // set alpha to all white (fully transparent) + pContent->Erase(); + + // embed primitives to paint them black + const primitive2d::Primitive2DReference xRef( + new primitive2d::ModifiedColorPrimitive2D( + aSequence, + std::make_shared<basegfx::BColorModifier_replace>( + basegfx::BColor(0.0, 0.0, 0.0)))); + const primitive2d::Primitive2DContainer xSeq { xRef }; + + // render + pContentProcessor->process(xSeq); + pContentProcessor.reset(); + + // get alpha channel from vdev + pContent->EnableMapMode(false); + const Bitmap aAlpha(pContent->GetBitmap(aEmptyPoint, aSizePixel)); +#ifdef DBG_UTIL + if(bDoSaveForVisualControl) + { + SvFileStream aNew( +#ifdef _WIN32 + "c:\\test_alpha.png" +#else + "~/test_alpha.png" +#endif + , StreamMode::WRITE|StreamMode::TRUNC); + BitmapEx aAlphaEx(aAlpha); + vcl::PNGWriter aPNGWriter(aAlphaEx); + aPNGWriter.Write(aNew); + } +#endif + + // create BitmapEx result + aRetval = BitmapEx(aContent, AlphaMask(aAlpha)); +#ifdef DBG_UTIL + if(bDoSaveForVisualControl) + { + SvFileStream aNew( +#ifdef _WIN32 + "c:\\test_combined.png" +#else + "~/test_combined.png" +#endif + , StreamMode::WRITE|StreamMode::TRUNC); + vcl::PNGWriter aPNGWriter(aRetval); + aPNGWriter.Write(aNew); + } +#endif + } + } + + return aRetval; + } + +} // end of namespace drawinglayer + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |