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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 <comphelper/diagnose_ex.hxx>
#include <drawinglayer/converters.hxx>
#ifdef DBG_UTIL
#include <tools/stream.hxx>
#include <vcl/filter/PngImageWriter.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())
return aRetval;
if(nDiscreteWidth <= 0 || nDiscreteHeight <= 0)
return aRetval;
// get destination size in pixels
const MapMode aMapModePixel(MapUnit::MapPixel);
const sal_uInt32 nViewVisibleArea(nDiscreteWidth * nDiscreteHeight);
drawinglayer::primitive2d::Primitive2DContainer aSequence(std::move(rSeq));
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(aSequence)));
aSequence = drawinglayer::primitive2d::Primitive2DContainer { aEmbed };
}
const Point aEmptyPoint;
const Size aSizePixel(nDiscreteWidth, nDiscreteHeight);
// Create target VirtualDevice. Use a VirtualDevice in the Alpha-mode.
// This creates the needed alpha channel 'in parallel'. It is not
// cheaper though since the VDev in that mode internally uses two VDevs,
// so ressoure-wise it's more expensive, speed-wise pretty much the same
// (the former two-path rendering created content & alpha separately in
// two runs). The former method always created the correct Alpha, but
// when transparent geometry was involved, the created content was
// blended against white (COL_WHITE) due to the starting conditions of
// creation.
// There are more ways than this to do this correctly, but this is the
// most simple for now. Due to hoping to be able to render to RGBA in the
// future anyways there is no need to experiment trying to do the correct
// thing using an expanded version of the former method.
ScopedVclPtrInstance<VirtualDevice> pContent(
*Application::GetDefaultDevice(), DeviceFormat::DEFAULT, DeviceFormat::DEFAULT);
// prepare vdev
if (!pContent->SetOutputSizePixel(aSizePixel, false))
{
SAL_WARN("vcl", "Cannot set VirtualDevice to size : " << aSizePixel.Width() << "x" << aSizePixel.Height());
return aRetval;
}
// We map to pixel, use that MapMode. Init by erasing.
pContent->SetMapMode(aMapModePixel);
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);
// render content
pContentProcessor->process(aSequence);
// create final BitmapEx result
aRetval = pContent->GetBitmapEx(aEmptyPoint, aSizePixel);
#ifdef DBG_UTIL
static bool bDoSaveForVisualControl(false); // loplugin:constvars:ignore
if(bDoSaveForVisualControl)
{
SvFileStream aNew(
#ifdef _WIN32
"c:\\test_combined.png"
#else
"~/test_combined.png"
#endif
, StreamMode::WRITE|StreamMode::TRUNC);
vcl::PngImageWriter aPNGWriter(aNew);
aPNGWriter.write(aRetval);
}
#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: */
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