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+/* Copyright © 2000 Free Software Foundation
+
+ This file is part of libgcj.
+
+This software is copyrighted work licensed under the terms of the
+Libgcj License. Please consult the file "LIBGCJ_LICENSE" for
+details. */
+
+package gnu.gcj.awt;
+
+import java.awt.geom.*;
+import java.awt.image.*;
+import java.awt.RenderingHints;
+
+/**
+ * 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 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");
+ }
+}
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