| /* DecodeBF16.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.nio.ByteBuffer; |
| import java.nio.ByteOrder; |
| import java.awt.image.BufferedImage; |
| import java.awt.image.ColorModel; |
| import java.awt.image.DirectColorModel; |
| import java.awt.image.Raster; |
| import java.awt.image.WritableRaster; |
| import java.awt.image.DataBuffer; |
| import java.awt.image.DataBufferUShort; |
| import java.awt.image.SinglePixelPackedSampleModel; |
| import java.awt.image.SampleModel; |
| import java.awt.Dimension; |
| |
| public class DecodeBF16 extends BMPDecoder { |
| private int[] bitmasks; |
| private boolean useDefaultMasks; |
| |
| public DecodeBF16(BMPFileHeader fh, BMPInfoHeader ih, |
| boolean udm){ |
| super(fh,ih); |
| |
| useDefaultMasks = udm; |
| if(useDefaultMasks) // 5-6-5 mask, B,G,R |
| bitmasks = new int[] { 0x00F800, 0x0007E0, 0x00001F }; |
| } |
| |
| public BufferedImage decode(ImageInputStream in) throws IOException, BMPException { |
| if(!useDefaultMasks) |
| bitmasks = readBitMasks(in); |
| skipToImage(in); |
| |
| Dimension d = infoHeader.getSize(); |
| int h = (int)d.getHeight(); |
| int w = (int)d.getWidth(); |
| |
| // BMP scanlines are padded to dword offsets |
| int scansize = (w + (w&1)) << 1; |
| short[] data = new short[w*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<w;x++) |
| data[x + y*w] = (short)((scanline[x*2] & (0xFF)) | |
| ((scanline[x*2+1] & (0xFF)) << 8)); |
| } |
| |
| ColorModel cm = new DirectColorModel(16, |
| bitmasks[0], bitmasks[1], bitmasks[2]); |
| SampleModel sm = new SinglePixelPackedSampleModel(DataBuffer.TYPE_USHORT, |
| w, h, |
| bitmasks); |
| DataBuffer db = new DataBufferUShort(data, w*h, 0); |
| WritableRaster raster = Raster.createWritableRaster(sm, db, null); |
| return new BufferedImage(cm, raster, false, null); |
| } |
| |
| } |
| |
| |
| |