152 lines
4.9 KiB
Java
152 lines
4.9 KiB
Java
/* Copyright (C) 2000, 2002 Free Software Foundation
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This file is part of GNU Classpath.
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GNU Classpath is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU Classpath is distributed in the hope that it will be useful, but
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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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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Classpath; see the file COPYING. If not, write to the
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Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA.
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Linking this library statically or dynamically with other modules is
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making a combined work based on this library. Thus, the terms and
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conditions of the GNU General Public License cover the whole
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combination.
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As a special exception, the copyright holders of this library give you
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permission to link this library with independent modules to produce an
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executable, regardless of the license terms of these independent
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modules, and to copy and distribute the resulting executable under
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terms of your choice, provided that you also meet, for each linked
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independent module, the terms and conditions of the license of that
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module. An independent module is a module which is not derived from
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or based on this library. If you modify this library, you may extend
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this exception to your version of the library, but you are not
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obligated to do so. If you do not wish to do so, delete this
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exception statement from your version. */
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package gnu.java.awt;
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import java.awt.geom.*;
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import java.awt.image.*;
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import java.awt.RenderingHints;
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/**
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* This raster copy operation assumes that both source and destination
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* sample models are tightly pixel packed and contain the same number
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* of bands.
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*
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* @throws java.lang.ClassCastException if the sample models of the
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* rasters are not of type ComponentSampleModel.
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*
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* @author Rolf W. Rasmussen <rolfwr@ii.uib.no>
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*/
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public class ComponentDataBlitOp implements RasterOp
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{
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public static ComponentDataBlitOp INSTANCE = new ComponentDataBlitOp();
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public WritableRaster filter(Raster src, WritableRaster dest)
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{
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if (dest == null)
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dest = createCompatibleDestRaster(src);
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DataBuffer srcDB = src.getDataBuffer();
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DataBuffer destDB = dest.getDataBuffer();
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ComponentSampleModel srcSM = (ComponentSampleModel) src.getSampleModel();
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ComponentSampleModel destSM = (ComponentSampleModel) dest.getSampleModel();
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// Calculate offset to data in the underlying arrays:
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int srcScanlineStride = srcSM.getScanlineStride();
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int destScanlineStride = destSM.getScanlineStride();
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int srcX = src.getMinX() - src.getSampleModelTranslateX();
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int srcY = src.getMinY() - src.getSampleModelTranslateY();
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int destX = dest.getMinX() - dest.getSampleModelTranslateX();
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int destY = dest.getMinY() - dest.getSampleModelTranslateY();
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int numBands = srcSM.getNumBands();
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/* We can't use getOffset(x, y) from the sample model since we
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don't want the band offset added in. */
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int srcOffset =
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numBands*srcX + srcScanlineStride*srcY + // from sample model
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srcDB.getOffset(); // from data buffer
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int destOffset =
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numBands*destX + destScanlineStride*destY + // from sample model
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destDB.getOffset(); // from data buffer
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// Determine how much, and how many times to blit.
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int rowSize = src.getWidth()*numBands;
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int h = src.getHeight();
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if ((rowSize == srcScanlineStride) &&
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(rowSize == destScanlineStride))
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{
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// collapse scan line blits to one large blit.
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rowSize *= h;
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h = 1;
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}
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// Do blitting
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Object srcArray = Buffers.getData(srcDB);
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Object destArray = Buffers.getData(destDB);
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for (int yd = 0; yd<h; yd++)
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{
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System.arraycopy(srcArray, srcOffset,
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destArray, destOffset,
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rowSize);
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srcOffset += srcScanlineStride;
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destOffset += destScanlineStride;
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}
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return dest;
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}
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public Rectangle2D getBounds2D(Raster src)
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{
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return src.getBounds();
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}
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public WritableRaster createCompatibleDestRaster(Raster src) {
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/* FIXME: Maybe we should explicitly create a raster with a
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tightly pixel packed sample model, rather than assuming
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that the createCompatibleWritableRaster() method in Raster
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will create one. */
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return src.createCompatibleWritableRaster();
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}
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public Point2D getPoint2D(Point2D srcPoint, Point2D destPoint)
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{
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if (destPoint == null)
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return (Point2D) srcPoint.clone();
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destPoint.setLocation(srcPoint);
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return destPoint;
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}
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public RenderingHints getRenderingHints()
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{
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throw new UnsupportedOperationException("not implemented");
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}
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}
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