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Diffstat (limited to 'canvas/source/vcl/bitmapbackbuffer.cxx')
| -rw-r--r-- | canvas/source/vcl/bitmapbackbuffer.cxx | 165 |
1 files changed, 165 insertions, 0 deletions
diff --git a/canvas/source/vcl/bitmapbackbuffer.cxx b/canvas/source/vcl/bitmapbackbuffer.cxx new file mode 100644 index 000000000000..53bb67dc32c2 --- /dev/null +++ b/canvas/source/vcl/bitmapbackbuffer.cxx @@ -0,0 +1,165 @@ +/************************************************************************* + * + * 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( sal_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( sal_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( sal_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; + } +} + |