165 lines
4.9 KiB
C++
165 lines
4.9 KiB
C++
/*************************************************************************
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*
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* OpenOffice.org - a multi-platform office productivity suite
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*
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* $RCSfile: bitmapbackbuffer.cxx,v $
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*
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* $Revision: 1.4 $
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*
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* last change: $Author: rt $ $Date: 2005-09-07 23:16:12 $
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*
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* The Contents of this file are made available subject to
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* the terms of GNU Lesser General Public License Version 2.1.
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*
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*
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* GNU Lesser General Public License Version 2.1
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* =============================================
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* Copyright 2005 by Sun Microsystems, Inc.
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* 901 San Antonio Road, Palo Alto, CA 94303, USA
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License version 2.1, as published by the Free Software Foundation.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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* MA 02111-1307 USA
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*
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************************************************************************/
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#include "bitmapbackbuffer.hxx"
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#ifndef _OSL_MUTEX_HXX_
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#include <osl/mutex.hxx>
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#endif
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#ifndef _VOS_MUTEX_HXX_
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#include <vos/mutex.hxx>
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#endif
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#ifndef _SV_SVAPP_HXX
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#include <vcl/svapp.hxx>
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#endif
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#ifndef _SV_BITMAPEX_HXX
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#include <vcl/bitmapex.hxx>
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#endif
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#ifndef _SV_BMPACC_HXX
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#include <vcl/bmpacc.hxx>
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#endif
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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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::vos::OGuard aGuard( Application::GetSolarMutex() );
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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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VirtualDevice& BitmapBackBuffer::getVirDev()
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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 VirtualDevice& BitmapBackBuffer::getVirDev() 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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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( 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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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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}
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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( 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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