diff options
Diffstat (limited to 'gcc-4.4.3/libjava/classpath/gnu/javax/imageio/bmp/DecodeRGB4.java')
| -rw-r--r-- | gcc-4.4.3/libjava/classpath/gnu/javax/imageio/bmp/DecodeRGB4.java | 92 |
1 files changed, 92 insertions, 0 deletions
diff --git a/gcc-4.4.3/libjava/classpath/gnu/javax/imageio/bmp/DecodeRGB4.java b/gcc-4.4.3/libjava/classpath/gnu/javax/imageio/bmp/DecodeRGB4.java new file mode 100644 index 000000000..a10d390ab --- /dev/null +++ b/gcc-4.4.3/libjava/classpath/gnu/javax/imageio/bmp/DecodeRGB4.java @@ -0,0 +1,92 @@ +/* DecodeRGB4.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.MultiPixelPackedSampleModel; +import java.awt.image.SampleModel; +import java.awt.Dimension; + +public class DecodeRGB4 extends BMPDecoder { + + public DecodeRGB4(BMPFileHeader fh, BMPInfoHeader ih){ + super(fh, ih); + } + + 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(); + int size = (w*h) >> 1; + + // Scanline padded to dword offsets + int wbytes = (w + (w & 1)) >> 1; + int scansize = ((wbytes & 3) != 0)? (wbytes + 4 - (wbytes&3)) : wbytes; + + byte[] data = new byte[wbytes*h]; + + for(int y=h-1;y>=0;y--){ + byte[] scanline = new byte[scansize]; + if(in.read(scanline) != scansize) + throw new IOException("Couldn't read image data."); + + for(int x=0;x<wbytes;x++) + data[x + y*wbytes] = scanline[x]; + } + SampleModel sm = new MultiPixelPackedSampleModel(DataBuffer.TYPE_BYTE, + w, h, 4); + + DataBuffer db = new DataBufferByte(data, w*h, 0); + WritableRaster raster = Raster.createWritableRaster(sm, db, null); + + return new BufferedImage(palette, raster, false, null); + } + +} + + |