1 files changed, 143 insertions, 0 deletions
diff --git a/gcc-4.4.3/libjava/classpath/gnu/javax/imageio/bmp/DecodeRLE8.java b/gcc-4.4.3/libjava/classpath/gnu/javax/imageio/bmp/DecodeRLE8.java
new file mode 100644
index 000000000..1d00e6751
--- /dev/null
+++ b/gcc-4.4.3/libjava/classpath/gnu/javax/imageio/bmp/DecodeRLE8.java
@@ -0,0 +1,143 @@
+/* DecodeRLE8.java --
+   Copyright (C)  2005  Free Software Foundation, Inc.
+
+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.javax.imageio.bmp;
+
+import java.io.IOException;
+import javax.imageio.stream.ImageInputStream;
+import java.awt.image.BufferedImage;
+import java.awt.image.IndexColorModel;
+import java.awt.image.Raster;
+import java.awt.image.WritableRaster;
+import java.awt.image.DataBuffer;
+import java.awt.image.DataBufferByte;
+import java.awt.image.SinglePixelPackedSampleModel;
+import java.awt.image.SampleModel;
+import java.awt.Dimension;
+
+public class DecodeRLE8 extends BMPDecoder {
+
+    public DecodeRLE8(BMPFileHeader fh, BMPInfoHeader ih){
+	super(fh, ih);
+    }
+
+    /**
+     * RLE control codes
+     */
+    private static final byte ESCAPE = (byte)0;
+    private static final byte EOL = (byte)0; // end of line
+    private static final byte EOB = (byte)1; // end of bitmap
+    private static final byte DELTA = (byte)2; // delta
+    
+    public BufferedImage decode(ImageInputStream in) throws IOException, BMPException {
+	IndexColorModel palette = readPalette(in);
+	skipToImage(in);
+
+	Dimension d = infoHeader.getSize();
+	int h = (int)d.getHeight();
+	int w = (int)d.getWidth();
+
+	byte[] data = uncompress(w, h, in);
+	SampleModel sm = new SinglePixelPackedSampleModel(DataBuffer.TYPE_BYTE, 
+							  w, h, 
+							  new int[] {0xFF});
+	DataBuffer db = new DataBufferByte(data, w*h, 0);
+	WritableRaster raster = Raster.createWritableRaster(sm, db, null);
+    
+	return new BufferedImage(palette, raster, false, null);
+    }
+    
+    private byte[] uncompress(int w, int h, ImageInputStream in) 
+	throws BMPException, IOException {
+	byte[] cmd = new byte[2];
+	byte[] data = new byte[w*h];
+	int offIn = 0;
+	int x=0,y=0;
+
+	try {
+	    while((x + y*w) < w*h){
+		if(in.read(cmd) != 2)
+		    throw new IOException("Error reading compressed data.");
+
+		if(cmd[0] == ESCAPE){
+		    switch(cmd[1]){
+		    case EOB: // end of bitmap
+			return data;
+		    case EOL: // end of line
+			x = 0;
+			y++;
+			break;
+		    case DELTA: // delta
+			if(in.read(cmd) != 2)
+			    throw new IOException("Error reading compressed data.");
+			int dx = cmd[0] & (0xFF);
+			int dy = cmd[1] & (0xFF);
+			x += dx;
+			y += dy;
+			break;
+			
+		    default:
+			// decode a literal run
+			int length = cmd[1] & (0xFF);
+			int copylength = length;
+
+			// absolute mode must be word-aligned
+			length += (length & 1);
+
+			byte[] run = new byte[length];
+			if(in.read(run) != length)
+			    throw new IOException("Error reading compressed data.");
+
+			System.arraycopy(run, 0, data, (x+w*(h-y-1)), 
+					 copylength);
+			x += copylength;
+			break;
+		    }
+		} else {
+		    // decode a byte run
+		    int length = cmd[0] & (0xFF);
+		    for(int i=0;i<length;i++)
+			data[(h-y-1)*w + x++] = cmd[1];
+		}
+	    }
+	    return data;
+ 	} catch(ArrayIndexOutOfBoundsException e){
+ 	    throw new BMPException("Invalid RLE data.");
+ 	}
+    }
+}
+