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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/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 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(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),
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);
#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: */
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