aboutsummaryrefslogtreecommitdiffstats
path: root/gcc-4.4.3/libjava/classpath/gnu/java/awt/ComponentDataBlitOp.java
diff options
context:
space:
mode:
Diffstat (limited to 'gcc-4.4.3/libjava/classpath/gnu/java/awt/ComponentDataBlitOp.java')
-rw-r--r--gcc-4.4.3/libjava/classpath/gnu/java/awt/ComponentDataBlitOp.java156
1 files changed, 156 insertions, 0 deletions
diff --git a/gcc-4.4.3/libjava/classpath/gnu/java/awt/ComponentDataBlitOp.java b/gcc-4.4.3/libjava/classpath/gnu/java/awt/ComponentDataBlitOp.java
new file mode 100644
index 000000000..545427ea7
--- /dev/null
+++ b/gcc-4.4.3/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");
+ }
+}