131 lines
4.1 KiB
Java
131 lines
4.1 KiB
Java
/*************************************************************************
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*
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* Copyright 2008 by Sun Microsystems, Inc.
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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: BackBuffer.java,v $
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* $Revision: 1.6 $
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*
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* This file is part of OpenOffice.org.
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*
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* OpenOffice.org is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License version 3
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* only, as published by the Free Software Foundation.
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*
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* OpenOffice.org 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
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* GNU Lesser General Public License version 3 for more details
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* (a copy is included in the LICENSE file that accompanied this code).
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*
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* You should have received a copy of the GNU Lesser General Public License
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* version 3 along with OpenOffice.org. If not, see
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* <http://www.openoffice.org/license.html>
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* for a copy of the LGPLv3 License.
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*
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************************************************************************/
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// UNO
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import com.sun.star.uno.UnoRuntime;
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import com.sun.star.uno.XComponentContext;
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import com.sun.star.uno.AnyConverter;
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import com.sun.star.uno.IQueryInterface;
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import com.sun.star.lang.XInitialization;
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import com.sun.star.lib.uno.helper.WeakBase;
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// OOo AWT
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import com.sun.star.awt.*;
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// Canvas
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import com.sun.star.rendering.*;
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// Java AWT
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import java.awt.*;
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import java.awt.image.*;
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import java.awt.geom.*;
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public class BackBuffer
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{
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private BufferedImage backBuffer;
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//private VolatileImage backBuffer;
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private Graphics2D backBufferGraphics;
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private Graphics2D referenceDevice;
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public BackBuffer( Graphics2D _referenceDevice,
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int width,
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int height )
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{
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referenceDevice = _referenceDevice;
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setSize( width, height );
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}
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public Graphics2D getGraphics()
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{
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return backBufferGraphics;
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}
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public void setSize( int width,
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int height )
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{
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if( backBuffer != null &&
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width == backBuffer.getWidth() &&
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height == backBuffer.getHeight() )
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{
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return;
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}
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if( backBufferGraphics != null )
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backBufferGraphics.dispose();
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if( backBuffer != null )
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backBuffer.flush();
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// TODO: Maybe VolatileImage with another BufferedImage as a backup is
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// a tad faster here.
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backBuffer = referenceDevice.getDeviceConfiguration().createCompatibleImage(width,
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height);
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// backBuffer = referenceDevice.getDeviceConfiguration().createCompatibleVolatileImage(width,
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// height);
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backBufferGraphics = backBuffer.createGraphics();
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CanvasUtils.initGraphics( backBufferGraphics );
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// clear the buffer to white (to have a defined state here)
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backBufferGraphics.setColor( java.awt.Color.white );
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backBufferGraphics.fillRect( 0,0,width,height );
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}
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public void redraw( Graphics2D graph )
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{
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if( graph != null &&
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backBuffer != null )
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{
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CanvasUtils.printLog("BackBuffer.redraw(): using buffer of size (" +
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backBuffer.getWidth() + "," + backBuffer.getHeight() + ")" );
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graph.drawImage(backBuffer, 0, 0, null);
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// TODO: this is just twiddled to work. I cannot be sure
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// that this volatile backbuffer will survive in the first
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// place, nor that it wise to leave it in VRAM.
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// only flush non-volatile images
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// CanvasUtils.postRenderImageTreatment( backBuffer );
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}
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}
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public java.awt.Image getBackBuffer()
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{
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return backBuffer;
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}
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public void dispose()
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{
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backBufferGraphics.dispose();
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backBuffer.flush();
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}
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}
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