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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);
drawinglayer::primitive2d::Primitive2DSequence aSequence(rSeq);
if(nViewVisibleArea > nMaxQuadratPixels)
{
// reduce render size
double 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(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: */
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