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/*************************************************************************
*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* Copyright 2000, 2010 Oracle and/or its affiliates.
*
* OpenOffice.org - a multi-platform office productivity suite
*
* This file is part of OpenOffice.org.
*
* OpenOffice.org is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License version 3
* only, as published by the Free Software Foundation.
*
* OpenOffice.org is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License version 3 for more details
* (a copy is included in the LICENSE file that accompanied this code).
*
* You should have received a copy of the GNU Lesser General Public License
* version 3 along with OpenOffice.org. If not, see
* <http://www.openoffice.org/license.html>
* for a copy of the LGPLv3 License.
*
************************************************************************/
// MARKER(update_precomp.py): autogen include statement, do not remove
#include "precompiled_canvas.hxx"
#include "bitmapbackbuffer.hxx"
#include <osl/mutex.hxx>
#include <vos/mutex.hxx>
#include <vcl/svapp.hxx>
#include <vcl/bitmapex.hxx>
#include <vcl/bmpacc.hxx>
namespace vclcanvas
{
BitmapBackBuffer::BitmapBackBuffer( const BitmapEx& rBitmap,
const OutputDevice& rRefDevice ) :
maBitmap( rBitmap ),
mpVDev( NULL ),
mrRefDevice( rRefDevice ),
mbBitmapContentIsCurrent( false ),
mbVDevContentIsCurrent( false )
{
}
BitmapBackBuffer::~BitmapBackBuffer()
{
// make sure solar mutex is held on deletion (other methods
// are supposed to be called with already locked solar mutex)
::vos::OGuard aGuard( Application::GetSolarMutex() );
if( mpVDev )
delete mpVDev;
}
OutputDevice& BitmapBackBuffer::getOutDev()
{
createVDev();
updateVDev();
return *mpVDev;
}
const OutputDevice& BitmapBackBuffer::getOutDev() const
{
createVDev();
updateVDev();
return *mpVDev;
}
void BitmapBackBuffer::clear()
{
// force current content to bitmap, make all transparent white
getBitmapReference().Erase(COL_TRANSPARENT);
}
BitmapEx& BitmapBackBuffer::getBitmapReference()
{
OSL_ENSURE( !mbBitmapContentIsCurrent || !mbVDevContentIsCurrent,
"BitmapBackBuffer::getBitmapReference(): Both bitmap and VDev are valid?!" );
if( mbVDevContentIsCurrent && mpVDev )
{
// VDev content is more current than bitmap - copy contents before!
mpVDev->EnableMapMode( FALSE );
const Point aEmptyPoint;
*maBitmap = mpVDev->GetBitmapEx( aEmptyPoint,
mpVDev->GetOutputSizePixel() );
}
// client queries bitmap, and will possibly alter content -
// next time, VDev needs to be updated
mbBitmapContentIsCurrent = true;
mbVDevContentIsCurrent = false;
return *maBitmap;
}
Size BitmapBackBuffer::getBitmapSizePixel() const
{
Size aSize = maBitmap->GetSizePixel();
if( mbVDevContentIsCurrent && mpVDev )
{
mpVDev->EnableMapMode( FALSE );
aSize = mpVDev->GetOutputSizePixel();
}
return aSize;
}
void BitmapBackBuffer::createVDev() const
{
if( !mpVDev )
{
// VDev not yet created, do it now. Create an alpha-VDev,
// if bitmap has transparency.
mpVDev = maBitmap->IsTransparent() ?
new VirtualDevice( mrRefDevice, 0, 0 ) :
new VirtualDevice( mrRefDevice );
OSL_ENSURE( mpVDev,
"BitmapBackBuffer::createVDev(): Unable to create VirtualDevice" );
mpVDev->SetOutputSizePixel( maBitmap->GetSizePixel() );
// #i95645#
#if defined( QUARTZ )
// use AA on VCLCanvas for Mac
mpVDev->SetAntialiasing( ANTIALIASING_ENABLE_B2DDRAW | mpVDev->GetAntialiasing() );
#else
// switch off AA for WIN32 and UNIX, the VCLCanvas does not look good with it and
// is not required to do AA. It would need to be adapted to use it correctly
// (especially gradient painting). This will need extra work.
mpVDev->SetAntialiasing(mpVDev->GetAntialiasing() & !ANTIALIASING_ENABLE_B2DDRAW);
#endif
}
}
void BitmapBackBuffer::updateVDev() const
{
OSL_ENSURE( !mbBitmapContentIsCurrent || !mbVDevContentIsCurrent,
"BitmapBackBuffer::updateVDev(): Both bitmap and VDev are valid?!" );
if( mpVDev && mbBitmapContentIsCurrent )
{
// fill with bitmap content
mpVDev->EnableMapMode( FALSE );
const Point aEmptyPoint;
mpVDev->DrawBitmapEx( aEmptyPoint, *maBitmap );
}
// canvas queried the VDev, and will possibly paint into
// it. Next time, bitmap must be updated
mbBitmapContentIsCurrent = false;
mbVDevContentIsCurrent = true;
}
}
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