429e172953
2004/11/17 17:00:27 thb 1.1.2.2: #118514# Canvas module reorg 2004/09/27 20:10:17 thb 1.1.2.1: #110496# Initial revision
126 lines
4.3 KiB
C++
126 lines
4.3 KiB
C++
/*************************************************************************
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*
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* $RCSfile: bitmapbackbuffer.hxx,v $
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*
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* $Revision: 1.2 $
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*
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* last change: $Author: rt $ $Date: 2004-11-26 17:09:12 $
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*
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* The Contents of this file are made available subject to the terms of
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* either of the following licenses
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*
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* - GNU Lesser General Public License Version 2.1
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* - Sun Industry Standards Source License Version 1.1
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*
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* Sun Microsystems Inc., October, 2000
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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 2000 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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* Sun Industry Standards Source License Version 1.1
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* =================================================
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* The contents of this file are subject to the Sun Industry Standards
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* Source License Version 1.1 (the "License"); You may not use this file
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* except in compliance with the License. You may obtain a copy of the
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* License at http://www.openoffice.org/license.html.
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*
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* Software provided under this License is provided on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING,
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* WITHOUT LIMITATION, WARRANTIES THAT THE SOFTWARE IS FREE OF DEFECTS,
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* MERCHANTABLE, FIT FOR A PARTICULAR PURPOSE, OR NON-INFRINGING.
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* See the License for the specific provisions governing your rights and
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* obligations concerning the Software.
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*
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* The Initial Developer of the Original Code is: Sun Microsystems, Inc.
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*
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* Copyright: 2000 by Sun Microsystems, Inc.
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*
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* All Rights Reserved.
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*
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* Contributor(s): _______________________________________
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*
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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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#ifndef _SV_VIRDEV_HXX
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#include <vcl/virdev.hxx>
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#endif
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#include <canvas/vclwrapper.hxx>
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#include "outdevprovider.hxx"
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namespace vclcanvas
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{
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/** OutDevProvider implementation for canvas bitmap.
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This class implements the OutDevProvider interface for the
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bitmap 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 mpVDev is non-NULL, the VDev
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contains the last valid content (which must be copied back
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to the bitmap, when getBitmapReference() is called).
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*/
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mutable bool mbBitmapContentIsCurrent;
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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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