155 lines
5 KiB
C++
155 lines
5 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/*
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* This file is part of the LibreOffice project.
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*
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* This file incorporates work covered by the following license notice:
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed
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* with this work for additional information regarding copyright
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* ownership. The ASF licenses this file to you under the Apache
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* License, Version 2.0 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.apache.org/licenses/LICENSE-2.0 .
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*/
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#include "bitmapbackbuffer.hxx"
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#include <osl/mutex.hxx>
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#include <vcl/svapp.hxx>
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#include <vcl/bitmapex.hxx>
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#include <vcl/bmpacc.hxx>
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namespace vclcanvas
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{
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BitmapBackBuffer::BitmapBackBuffer( const BitmapEx& rBitmap,
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const OutputDevice& rRefDevice ) :
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maBitmap( rBitmap ),
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mpVDev( NULL ),
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mrRefDevice( rRefDevice ),
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mbBitmapContentIsCurrent( false ),
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mbVDevContentIsCurrent( false )
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{
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}
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BitmapBackBuffer::~BitmapBackBuffer()
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{
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// make sure solar mutex is held on deletion (other methods
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// are supposed to be called with already locked solar mutex)
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SolarMutexGuard aGuard;
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if( mpVDev )
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delete mpVDev;
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}
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OutputDevice& BitmapBackBuffer::getOutDev()
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{
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createVDev();
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updateVDev();
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return *mpVDev;
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}
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const OutputDevice& BitmapBackBuffer::getOutDev() const
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{
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createVDev();
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updateVDev();
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return *mpVDev;
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}
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void BitmapBackBuffer::clear()
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{
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// force current content to bitmap, make all transparent white
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getBitmapReference().Erase(COL_TRANSPARENT);
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}
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BitmapEx& BitmapBackBuffer::getBitmapReference()
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{
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OSL_ENSURE( !mbBitmapContentIsCurrent || !mbVDevContentIsCurrent,
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"BitmapBackBuffer::getBitmapReference(): Both bitmap and VDev are valid?!" );
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if( mbVDevContentIsCurrent && mpVDev )
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{
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// VDev content is more current than bitmap - copy contents before!
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mpVDev->EnableMapMode( sal_False );
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const Point aEmptyPoint;
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*maBitmap = mpVDev->GetBitmapEx( aEmptyPoint,
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mpVDev->GetOutputSizePixel() );
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}
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// client queries bitmap, and will possibly alter content -
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// next time, VDev needs to be updated
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mbBitmapContentIsCurrent = true;
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mbVDevContentIsCurrent = false;
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return *maBitmap;
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}
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Size BitmapBackBuffer::getBitmapSizePixel() const
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{
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Size aSize = maBitmap->GetSizePixel();
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if( mbVDevContentIsCurrent && mpVDev )
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{
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mpVDev->EnableMapMode( sal_False );
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aSize = mpVDev->GetOutputSizePixel();
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}
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return aSize;
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}
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void BitmapBackBuffer::createVDev() const
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{
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if( !mpVDev )
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{
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// VDev not yet created, do it now. Create an alpha-VDev,
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// if bitmap has transparency.
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mpVDev = maBitmap->IsTransparent() ?
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new VirtualDevice( mrRefDevice, 0, 0 ) :
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new VirtualDevice( mrRefDevice );
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OSL_ENSURE( mpVDev,
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"BitmapBackBuffer::createVDev(): Unable to create VirtualDevice" );
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mpVDev->SetOutputSizePixel( maBitmap->GetSizePixel() );
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// #i95645#
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#if defined( QUARTZ )
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// use AA on VCLCanvas for Mac
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mpVDev->SetAntialiasing( ANTIALIASING_ENABLE_B2DDRAW | mpVDev->GetAntialiasing() );
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#else
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// switch off AA for WIN32 and UNIX, the VCLCanvas does not look good with it and
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// is not required to do AA. It would need to be adapted to use it correctly
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// (especially gradient painting). This will need extra work.
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mpVDev->SetAntialiasing(mpVDev->GetAntialiasing() & ~ANTIALIASING_ENABLE_B2DDRAW);
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#endif
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}
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}
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void BitmapBackBuffer::updateVDev() const
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{
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OSL_ENSURE( !mbBitmapContentIsCurrent || !mbVDevContentIsCurrent,
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"BitmapBackBuffer::updateVDev(): Both bitmap and VDev are valid?!" );
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if( mpVDev && mbBitmapContentIsCurrent )
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{
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// fill with bitmap content
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mpVDev->EnableMapMode( sal_False );
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const Point aEmptyPoint;
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mpVDev->DrawBitmapEx( aEmptyPoint, *maBitmap );
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}
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// canvas queried the VDev, and will possibly paint into
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// it. Next time, bitmap must be updated
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mbBitmapContentIsCurrent = false;
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mbVDevContentIsCurrent = true;
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}
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}
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/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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