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Diffstat (limited to 'gcc-4.4.3/libjava/classpath/gnu/java/awt/image/ImageDecoder.java')
| -rw-r--r-- | gcc-4.4.3/libjava/classpath/gnu/java/awt/image/ImageDecoder.java | 188 |
1 files changed, 188 insertions, 0 deletions
diff --git a/gcc-4.4.3/libjava/classpath/gnu/java/awt/image/ImageDecoder.java b/gcc-4.4.3/libjava/classpath/gnu/java/awt/image/ImageDecoder.java new file mode 100644 index 000000000..8e8eecb25 --- /dev/null +++ b/gcc-4.4.3/libjava/classpath/gnu/java/awt/image/ImageDecoder.java @@ -0,0 +1,188 @@ +/* ImageDecoder.java -- + Copyright (C) 1999, 2000, 2004 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.java.awt.image; + +import java.awt.image.ImageConsumer; +import java.awt.image.ImageProducer; +import java.io.ByteArrayInputStream; +import java.io.DataInput; +import java.io.EOFException; +import java.io.FileInputStream; +import java.io.IOException; +import java.io.InputStream; +import java.net.URL; +import java.util.Vector; + +public abstract class ImageDecoder implements ImageProducer +{ + Vector consumers = new Vector (); + String filename; + URL url; + byte[] data; + int offset; + int length; + InputStream input; + DataInput datainput; + + static + { + // FIXME: there was some broken code here that looked like + // it wanted to rely on this property. I don't have any idea + // what it was intended to do. + // String endian = System.getProperties ().getProperty ("gnu.cpu.endian"); + } + + public ImageDecoder (String filename) + { + this.filename = filename; + } + + public ImageDecoder (URL url) + { + this.url = url; + } + + public ImageDecoder (InputStream is) + { + this.input = is; + } + + public ImageDecoder (DataInput datainput) + { + this.datainput = datainput; + } + + public ImageDecoder (byte[] imagedata, int imageoffset, int imagelength) + { + data = imagedata; + offset = imageoffset; + length = imagelength; + } + + public void addConsumer (ImageConsumer ic) + { + consumers.addElement (ic); + } + + public boolean isConsumer (ImageConsumer ic) + { + return consumers.contains (ic); + } + + public void removeConsumer (ImageConsumer ic) + { + consumers.removeElement (ic); + } + + public void startProduction (ImageConsumer ic) + { + if (!isConsumer(ic)) + addConsumer(ic); + + Vector list = (Vector) consumers.clone (); + try + { + // Create the input stream here rather than in the + // ImageDecoder constructors so that exceptions cause + // imageComplete to be called with an appropriate error + // status. + if (input == null) + { + try + { + if (url != null) + input = url.openStream(); + else if (datainput != null) + input = new DataInputStreamWrapper(datainput); + else + { + if (filename != null) + input = new FileInputStream (filename); + else + input = new ByteArrayInputStream (data, offset, length); + } + produce (list, input); + } + finally + { + input = null; + } + } + else + { + produce (list, input); + } + } + catch (Exception e) + { + for (int i = 0; i < list.size (); i++) + { + ImageConsumer ic2 = (ImageConsumer) list.elementAt (i); + ic2.imageComplete (ImageConsumer.IMAGEERROR); + } + } + } + + public void requestTopDownLeftRightResend (ImageConsumer ic) + { + } + + public abstract void produce (Vector v, InputStream is) throws IOException; + + private static class DataInputStreamWrapper extends InputStream + { + private final DataInput datainput; + + DataInputStreamWrapper(DataInput datainput) + { + this.datainput = datainput; + } + + public int read() throws IOException + { + try + { + return datainput.readByte() & 0xFF; + } + catch (EOFException eofe) + { + return -1; + } + } + } +} |