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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/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/svapp.hxx>
+#include <vcl/virdev.hxx>
+#include <com/sun/star/geometry/RealRectangle2D.hpp>
+#include <tools/diagnose_ex.h>
+
+#include <drawinglayer/converters.hxx>
+
+#ifdef DBG_UTIL
+#include <tools/stream.hxx>
+#include <vcl/pngwrite.hxx>
+#endif
+
+namespace drawinglayer
+{
+
+ BitmapEx convertToBitmapEx(
+ drawinglayer::primitive2d::Primitive2DContainer&& rSeq,
+ const geometry::ViewInformation2D& rViewInformation2D,
+ sal_uInt32 nDiscreteWidth,
+ sal_uInt32 nDiscreteHeight,
+ sal_uInt32 nMaxSquarePixels)
+ {
+ 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;
+
+ if(nViewVisibleArea > nMaxSquarePixels)
+ {
+ // reduce render size
+ double fReduceFactor = sqrt(static_cast<double>(nMaxSquarePixels) / 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),
+ std::move(rSeq)));
+
+ aSequence = drawinglayer::primitive2d::Primitive2DContainer { aEmbed };
+ }
+ else
+ aSequence = std::move(rSeq);
+
+ 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);
+
+#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(
+ std::move(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;
+ }
+
+ BitmapEx convertPrimitive2DContainerToBitmapEx(
+ primitive2d::Primitive2DContainer&& rSequence,
+ const basegfx::B2DRange& rTargetRange,
+ sal_uInt32 nMaximumQuadraticPixels,
+ const o3tl::Length eTargetUnit,
+ const std::optional<Size>& rTargetDPI)
+ {
+ if(rSequence.empty())
+ return BitmapEx();
+
+ try
+ {
+ css::geometry::RealRectangle2D aRealRect;
+ aRealRect.X1 = rTargetRange.getMinX();
+ aRealRect.Y1 = rTargetRange.getMinY();
+ aRealRect.X2 = rTargetRange.getMaxX();
+ aRealRect.Y2 = rTargetRange.getMaxY();
+
+ // get system DPI
+ Size aDPI(Application::GetDefaultDevice()->LogicToPixel(Size(1, 1), MapMode(MapUnit::MapInch)));
+ if (rTargetDPI.has_value())
+ {
+ aDPI = *rTargetDPI;
+ }
+
+ ::sal_uInt32 DPI_X = aDPI.getWidth();
+ ::sal_uInt32 DPI_Y = aDPI.getHeight();
+ const basegfx::B2DRange aRange(aRealRect.X1, aRealRect.Y1, aRealRect.X2, aRealRect.Y2);
+ const double fWidth(aRange.getWidth());
+ const double fHeight(aRange.getHeight());
+
+ if(!(basegfx::fTools::more(fWidth, 0.0) && basegfx::fTools::more(fHeight, 0.0)))
+ return BitmapEx();
+
+ if(0 == DPI_X)
+ {
+ DPI_X = 75;
+ }
+
+ if(0 == DPI_Y)
+ {
+ DPI_Y = 75;
+ }
+
+ if(0 == nMaximumQuadraticPixels)
+ {
+ nMaximumQuadraticPixels = 500000;
+ }
+
+ const auto aViewInformation2D = geometry::createViewInformation2D({});
+ const sal_uInt32 nDiscreteWidth(basegfx::fround(o3tl::convert(fWidth, eTargetUnit, o3tl::Length::in) * DPI_X));
+ const sal_uInt32 nDiscreteHeight(basegfx::fround(o3tl::convert(fHeight, eTargetUnit, o3tl::Length::in) * DPI_Y));
+
+ basegfx::B2DHomMatrix aEmbedding(
+ basegfx::utils::createTranslateB2DHomMatrix(
+ -aRange.getMinX(),
+ -aRange.getMinY()));
+
+ aEmbedding.scale(
+ nDiscreteWidth / fWidth,
+ nDiscreteHeight / fHeight);
+
+ const primitive2d::Primitive2DReference xEmbedRef(
+ new primitive2d::TransformPrimitive2D(
+ aEmbedding,
+ std::move(rSequence)));
+ primitive2d::Primitive2DContainer xEmbedSeq { xEmbedRef };
+
+ BitmapEx aBitmapEx(
+ convertToBitmapEx(
+ std::move(xEmbedSeq),
+ aViewInformation2D,
+ nDiscreteWidth,
+ nDiscreteHeight,
+ nMaximumQuadraticPixels));
+
+ if(aBitmapEx.IsEmpty())
+ return BitmapEx();
+ aBitmapEx.SetPrefMapMode(MapMode(MapUnit::Map100thMM));
+ aBitmapEx.SetPrefSize(Size(basegfx::fround(fWidth), basegfx::fround(fHeight)));
+
+ return aBitmapEx;
+ }
+ catch (const css::uno::Exception&)
+ {
+ TOOLS_WARN_EXCEPTION("vcl", "Got no graphic::XPrimitive2DRenderer!");
+ }
+ catch (const std::exception& e)
+ {
+ SAL_WARN("vcl", "Got no graphic::XPrimitive2DRenderer! : " << e.what());
+ }
+
+ return BitmapEx();
+ }
+} // end of namespace drawinglayer
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
generated by cgit v1.2.3 (git 2.39.1) at 2024-06-07 15:19:06 +0000