1 files changed, 140 insertions, 0 deletions
diff --git a/libjava/gnu/java/awt/ComponentDataBlitOp.java b/libjava/gnu/java/awt/ComponentDataBlitOp.java
new file mode 100644
index 00000000000..ac6eb3ed24e
--- /dev/null
+++ b/libjava/gnu/java/awt/ComponentDataBlitOp.java
@@ -0,0 +1,140 @@
+/* Copyright (C) 2000, 2002  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., 59 Temple Place, Suite 330, Boston, MA
+02111-1307 USA.
+
+As a special exception, if you link this library with other files to
+produce an executable, this library does not by itself cause the
+resulting executable to be covered by the GNU General Public License.
+This exception does not however invalidate any other reasons why the
+executable file might be covered by the GNU General Public License. */
+
+package gnu.java.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");
+  }
+}