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author | upstream source tree <ports@midipix.org> | 2015-03-15 20:14:05 -0400 |
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committer | upstream source tree <ports@midipix.org> | 2015-03-15 20:14:05 -0400 |
commit | 554fd8c5195424bdbcabf5de30fdc183aba391bd (patch) | |
tree | 976dc5ab7fddf506dadce60ae936f43f58787092 /libjava/classpath/gnu/java/awt/ComponentDataBlitOp.java | |
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Diffstat (limited to 'libjava/classpath/gnu/java/awt/ComponentDataBlitOp.java')
-rw-r--r-- | libjava/classpath/gnu/java/awt/ComponentDataBlitOp.java | 156 |
1 files changed, 156 insertions, 0 deletions
diff --git a/libjava/classpath/gnu/java/awt/ComponentDataBlitOp.java b/libjava/classpath/gnu/java/awt/ComponentDataBlitOp.java new file mode 100644 index 000000000..becf54167 --- /dev/null +++ b/libjava/classpath/gnu/java/awt/ComponentDataBlitOp.java @@ -0,0 +1,156 @@ +/* Copyright (C) 2000, 2002, 2004 Free Software Foundation + +This file is part of GNU Classpath. + +GNU Classpath is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU Classpath 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 +General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 USA. + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + +package gnu.java.awt; + +import java.awt.RenderingHints; +import java.awt.geom.Point2D; +import java.awt.geom.Rectangle2D; +import java.awt.image.ComponentSampleModel; +import java.awt.image.DataBuffer; +import java.awt.image.Raster; +import java.awt.image.RasterOp; +import java.awt.image.WritableRaster; + +/** + * This raster copy operation assumes that both source and destination + * sample models are tightly pixel packed and contain the same number + * of bands. + * + * @throws java.lang.ClassCastException if the sample models of the + * rasters are not of type ComponentSampleModel. + * + * @author Rolf W. Rasmussen (rolfwr@ii.uib.no) + */ +public class ComponentDataBlitOp implements RasterOp +{ + public static final ComponentDataBlitOp INSTANCE = new ComponentDataBlitOp(); + + public WritableRaster filter(Raster src, WritableRaster dest) + { + if (dest == null) + dest = createCompatibleDestRaster(src); + + DataBuffer srcDB = src.getDataBuffer(); + DataBuffer destDB = dest.getDataBuffer(); + + ComponentSampleModel srcSM = (ComponentSampleModel) src.getSampleModel(); + ComponentSampleModel destSM = (ComponentSampleModel) dest.getSampleModel(); + + + // Calculate offset to data in the underlying arrays: + + int srcScanlineStride = srcSM.getScanlineStride(); + int destScanlineStride = destSM.getScanlineStride(); + int srcX = src.getMinX() - src.getSampleModelTranslateX(); + int srcY = src.getMinY() - src.getSampleModelTranslateY(); + int destX = dest.getMinX() - dest.getSampleModelTranslateX(); + int destY = dest.getMinY() - dest.getSampleModelTranslateY(); + + int numBands = srcSM.getNumBands(); + + /* We can't use getOffset(x, y) from the sample model since we + don't want the band offset added in. */ + + int srcOffset = + numBands*srcX + srcScanlineStride*srcY + // from sample model + srcDB.getOffset(); // from data buffer + + int destOffset = + numBands*destX + destScanlineStride*destY + // from sample model + destDB.getOffset(); // from data buffer + + // Determine how much, and how many times to blit. + + int rowSize = src.getWidth()*numBands; + int h = src.getHeight(); + + if ((rowSize == srcScanlineStride) && + (rowSize == destScanlineStride)) + { + // collapse scan line blits to one large blit. + rowSize *= h; + h = 1; + } + + + // Do blitting + + Object srcArray = Buffers.getData(srcDB); + Object destArray = Buffers.getData(destDB); + + for (int yd = 0; yd<h; yd++) + { + System.arraycopy(srcArray, srcOffset, + destArray, destOffset, + rowSize); + srcOffset += srcScanlineStride; + destOffset += destScanlineStride; + } + + + return dest; + } + + public Rectangle2D getBounds2D(Raster src) + { + return src.getBounds(); + } + + public WritableRaster createCompatibleDestRaster(Raster src) { + + /* FIXME: Maybe we should explicitly create a raster with a + tightly pixel packed sample model, rather than assuming + that the createCompatibleWritableRaster() method in Raster + will create one. */ + + return src.createCompatibleWritableRaster(); + } + + public Point2D getPoint2D(Point2D srcPoint, Point2D destPoint) + { + if (destPoint == null) + return (Point2D) srcPoint.clone(); + + destPoint.setLocation(srcPoint); + return destPoint; + } + + public RenderingHints getRenderingHints() + { + throw new UnsupportedOperationException("not implemented"); + } +} |