2eb92dae04
2005/10/08 12:52:04 thb 1.3.10.2: RESYNC: (1.3-1.4); FILE MERGED 2005/06/17 23:49:48 thb 1.3.10.1: #i48939# Huge refactoring of canvas; as much functionality as possible is now common in a bunch of shared base classes (input checking, locking, sprite redraw, etc.); added scroll update optimization, transparently to all canvas implementations
111 lines
3.7 KiB
C++
111 lines
3.7 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.hxx,v $
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*
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* $Revision: 1.5 $
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*
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* last change: $Author: kz $ $Date: 2005-11-02 12:57:35 $
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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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#ifndef _VCLCANVAS_BITMAPBACKBUFFER_HXX_
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#define _VCLCANVAS_BITMAPBACKBUFFER_HXX_
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#include <vcl/virdev.hxx>
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#include <vcl/bitmapex.hxx>
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#include <canvas/vclwrapper.hxx>
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#include "outdevprovider.hxx"
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#include <boost/shared_ptr.hpp>
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namespace vclcanvas
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{
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/** Backbuffer implementation for canvas bitmap.
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This class abstracts away the renderable bitmap for the bitmap
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canvas. The actual VirtualDevice is only created when
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necessary, which makes read-only bitmaps a lot smaller.
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*/
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class BitmapBackBuffer : public OutDevProvider
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{
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public:
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/** Create a backbuffer for given reference device
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*/
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BitmapBackBuffer( const BitmapEx& rBitmap,
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const OutputDevice& rRefDevice );
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~BitmapBackBuffer();
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virtual OutputDevice& getOutDev();
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virtual const OutputDevice& getOutDev() const;
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VirtualDevice& getVirDev();
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const VirtualDevice& getVirDev() const;
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/** Exposing our internal bitmap. Only to be used from
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CanvasBitmapHelper
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@internal
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*/
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BitmapEx& getBitmapReference();
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private:
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void createVDev() const;
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void updateVDev() const;
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::canvas::vcltools::VCLObject<BitmapEx> maBitmap;
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mutable VirtualDevice* mpVDev; // created only on demand
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const OutputDevice& mrRefDevice;
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/** When true, the bitmap contains the last valid
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content. When false, and mbVDevContentIsCurrent is true,
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the VDev contains the last valid content (which must be
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copied back to the bitmap, when getBitmapReference() is
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called). When both are false, this object is just
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initialized.
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*/
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mutable bool mbBitmapContentIsCurrent;
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/** When true, and mpVDev is non-NULL, the VDev contains the
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last valid content. When false, and
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mbBitmapContentIsCurrent is true, the bitmap contains the
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last valid content. When both are false, this object is
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just initialized.
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*/
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mutable bool mbVDevContentIsCurrent;
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};
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typedef ::boost::shared_ptr< BitmapBackBuffer > BitmapBackBufferSharedPtr;
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}
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#endif /* #ifndef _VCLCANVAS_BITMAPBACKBUFFER_HXX_ */
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