INTEGRATION: CWS presentationengine01 (1.1.2); FILE ADDED

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

1 files changed, 125 insertions, 0 deletions

diff --git a/canvas/source/vcl/bitmapbackbuffer.hxx b/canvas/source/vcl/bitmapbackbuffer.hxx
new file mode 100644
index 000000000000..0b8fe7837798
--- /dev/null
+++ b/canvas/source/vcl/bitmapbackbuffer.hxx
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+/*************************************************************************
+ *
+ *  $RCSfile: bitmapbackbuffer.hxx,v $
+ *
+ *  $Revision: 1.2 $
+ *
+ *  last change: $Author: rt $ $Date: 2004-11-26 17:09:12 $
+ *
+ *  The Contents of this file are made available subject to the terms of
+ *  either of the following licenses
+ *
+ *         - GNU Lesser General Public License Version 2.1
+ *         - Sun Industry Standards Source License Version 1.1
+ *
+ *  Sun Microsystems Inc., October, 2000
+ *
+ *  GNU Lesser General Public License Version 2.1
+ *  =============================================
+ *  Copyright 2000 by Sun Microsystems, Inc.
+ *  901 San Antonio Road, Palo Alto, CA 94303, USA
+ *
+ *  This library is free software; you can redistribute it and/or
+ *  modify it under the terms of the GNU Lesser General Public
+ *  License version 2.1, as published by the Free Software Foundation.
+ *
+ *  This library 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 for more details.
+ *
+ *  You should have received a copy of the GNU Lesser General Public
+ *  License along with this library; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ *  MA  02111-1307  USA
+ *
+ *
+ *  Sun Industry Standards Source License Version 1.1
+ *  =================================================
+ *  The contents of this file are subject to the Sun Industry Standards
+ *  Source License Version 1.1 (the "License"); You may not use this file
+ *  except in compliance with the License. You may obtain a copy of the
+ *  License at http://www.openoffice.org/license.html.
+ *
+ *  Software provided under this License is provided on an "AS IS" basis,
+ *  WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING,
+ *  WITHOUT LIMITATION, WARRANTIES THAT THE SOFTWARE IS FREE OF DEFECTS,
+ *  MERCHANTABLE, FIT FOR A PARTICULAR PURPOSE, OR NON-INFRINGING.
+ *  See the License for the specific provisions governing your rights and
+ *  obligations concerning the Software.
+ *
+ *  The Initial Developer of the Original Code is: Sun Microsystems, Inc.
+ *
+ *  Copyright: 2000 by Sun Microsystems, Inc.
+ *
+ *  All Rights Reserved.
+ *
+ *  Contributor(s): _______________________________________
+ *
+ *
+ ************************************************************************/
+
+#ifndef _VCLCANVAS_BITMAPBACKBUFFER_HXX_
+#define _VCLCANVAS_BITMAPBACKBUFFER_HXX_
+
+#ifndef _SV_VIRDEV_HXX
+#include <vcl/virdev.hxx>
+#endif
+
+#include <canvas/vclwrapper.hxx>
+#include "outdevprovider.hxx"
+
+
+namespace vclcanvas
+{
+    /** OutDevProvider implementation for canvas bitmap.
+
+        This class implements the OutDevProvider interface for the
+        bitmap canvas. The actual VirtualDevice is only created when
+        necessary, which makes read-only bitmaps a lot smaller.
+    */
+    class BitmapBackBuffer : public OutDevProvider
+    {
+    public:
+        /** Create a backbuffer for given reference device
+         */
+        BitmapBackBuffer( const BitmapEx&       rBitmap,
+                          const OutputDevice&   rRefDevice );
+
+        ~BitmapBackBuffer();
+
+        virtual OutputDevice&           getOutDev();
+        virtual const OutputDevice&     getOutDev() const;
+
+        VirtualDevice&                  getVirDev();
+        const VirtualDevice&            getVirDev() const;
+
+        /** Exposing our internal bitmap. Only to be used from
+            CanvasBitmapHelper
+
+            @internal
+        */
+        BitmapEx&                       getBitmapReference();
+
+    private:
+        void createVDev() const;
+        void updateVDev() const;
+
+        ::canvas::vcltools::VCLObject<BitmapEx> maBitmap;
+        mutable VirtualDevice*                  mpVDev; // created only on demand
+
+        const OutputDevice&                     mrRefDevice;
+
+        /** When true, the bitmap contains the last valid
+            content. When false, and mpVDev is non-NULL, the VDev
+            contains the last valid content (which must be copied back
+            to the bitmap, when getBitmapReference() is called).
+         */
+        mutable bool                            mbBitmapContentIsCurrent;
+    };
+
+    typedef ::boost::shared_ptr< BitmapBackBuffer > BitmapBackBufferSharedPtr;
+
+}
+
+#endif /* #ifndef _VCLCANVAS_BITMAPBACKBUFFER_HXX_ */