mirror of git://gcc.gnu.org/git/gcc.git
95 lines
3.4 KiB
Java
95 lines
3.4 KiB
Java
/* DecodeRGB1.java --
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Copyright (C) 2005 Free Software Foundation, Inc.
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This file is part of GNU Classpath.
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GNU Classpath is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU Classpath is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Classpath; see the file COPYING. If not, write to the
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Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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02110-1301 USA.
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Linking this library statically or dynamically with other modules is
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making a combined work based on this library. Thus, the terms and
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conditions of the GNU General Public License cover the whole
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combination.
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As a special exception, the copyright holders of this library give you
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permission to link this library with independent modules to produce an
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executable, regardless of the license terms of these independent
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modules, and to copy and distribute the resulting executable under
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terms of your choice, provided that you also meet, for each linked
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independent module, the terms and conditions of the license of that
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module. An independent module is a module which is not derived from
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or based on this library. If you modify this library, you may extend
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this exception to your version of the library, but you are not
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obligated to do so. If you do not wish to do so, delete this
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exception statement from your version. */
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package gnu.javax.imageio.bmp;
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import java.io.IOException;
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import javax.imageio.stream.ImageInputStream;
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import java.awt.image.BufferedImage;
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import java.awt.image.IndexColorModel;
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import java.awt.image.Raster;
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import java.awt.image.WritableRaster;
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import java.awt.image.DataBuffer;
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import java.awt.image.DataBufferByte;
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import java.awt.image.MultiPixelPackedSampleModel;
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import java.awt.image.SampleModel;
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import java.awt.Dimension;
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public class DecodeRGB1 extends BMPDecoder {
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public DecodeRGB1(BMPFileHeader fh, BMPInfoHeader ih){
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super(fh, ih);
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}
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public BufferedImage decode(ImageInputStream in)
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throws IOException, BMPException {
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IndexColorModel palette = readPalette(in);
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skipToImage(in);
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Dimension d = infoHeader.getSize();
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int h = (int)d.getHeight();
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int w = (int)d.getWidth();
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int size = (w*h)>>3;
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int scansize = w>>3;
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byte[] data = new byte[size];
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for(int y=h-1;y>=0;y--){
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// Scanlines are padded to dword boundries
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int readsize = scansize;
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if((readsize & 3) != 0) readsize += (4 - (scansize & 3));
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byte[] scanline = new byte[readsize];
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if(in.read(scanline) != readsize)
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throw new IOException("Couldn't read image data.");
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for(int x=0;x<scansize;x++)
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data[x + y*scansize] = scanline[x];
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}
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SampleModel sm = new MultiPixelPackedSampleModel(DataBuffer.TYPE_BYTE,
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w, h, 1);
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DataBuffer db = new DataBufferByte(data, size, 0);
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WritableRaster raster = Raster.createWritableRaster(sm, db, null);
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return new BufferedImage(palette, raster, false, null);
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}
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}
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