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 20:10:26 thb 1.1.2.1: #110496# Initial revision

1 files changed, 180 insertions, 0 deletions

diff --git a/canvas/source/vcl/bitmapbackbuffer.cxx b/canvas/source/vcl/bitmapbackbuffer.cxx
new file mode 100644
index 000000000000..e2fa91fda391
--- /dev/null
+++ b/canvas/source/vcl/bitmapbackbuffer.cxx
@@ -0,0 +1,180 @@
+/*************************************************************************
+ *
+ *  $RCSfile: bitmapbackbuffer.cxx,v $
+ *
+ *  $Revision: 1.2 $
+ *
+ *  last change: $Author: rt $ $Date: 2004-11-26 17:09:00 $
+ *
+ *  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): _______________________________________
+ *
+ *
+ ************************************************************************/
+
+#include "bitmapbackbuffer.hxx"
+
+#ifndef _OSL_MUTEX_HXX_
+#include <osl/mutex.hxx>
+#endif
+#ifndef _VOS_MUTEX_HXX_
+#include <vos/mutex.hxx>
+#endif
+
+#ifndef _SV_SVAPP_HXX
+#include <vcl/svapp.hxx>
+#endif
+#ifndef _SV_BITMAPEX_HXX
+#include <vcl/bitmapex.hxx>
+#endif
+#ifndef _SV_BMPACC_HXX
+#include <vcl/bmpacc.hxx>
+#endif
+
+
+namespace vclcanvas
+{
+    BitmapBackBuffer::BitmapBackBuffer( const BitmapEx&         rBitmap,
+                                        const OutputDevice&     rRefDevice ) :
+        maBitmap( rBitmap ),
+        mpVDev( NULL ),
+        mrRefDevice( rRefDevice ),
+        mbBitmapContentIsCurrent( true )
+    {
+    }
+
+    BitmapBackBuffer::~BitmapBackBuffer()
+    {
+        // make sure solar mutex is held on deletion (other methods
+        // are supposed to already hold the 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;
+    }
+
+    VirtualDevice& BitmapBackBuffer::getVirDev()
+    {
+        createVDev();
+        updateVDev();
+        return *mpVDev;
+    }
+
+    const VirtualDevice& BitmapBackBuffer::getVirDev() const
+    {
+        createVDev();
+        updateVDev();
+        return *mpVDev;
+    }
+
+    BitmapEx& BitmapBackBuffer::getBitmapReference()
+    {
+        if( !mbBitmapContentIsCurrent && 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;
+
+        return *maBitmap;
+    }
+
+    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() );
+        }
+    }
+
+    void BitmapBackBuffer::updateVDev() const
+    {
+        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
+            mbBitmapContentIsCurrent = false;
+        }
+    }
+
+}