/*
* $RCSfile: FileLoadRIF.java,v $
*
* Copyright (c) 2005 Sun Microsystems, Inc. All rights reserved.
*
* Use is subject to license terms.
*
* $Revision: 1.3 $
* $Date: 2006/06/17 00:02:28 $
* $State: Exp $
*/
package com.lightcrafts.media.jai.opimage;
import java.awt.RenderingHints;
import java.awt.image.RenderedImage;
import java.awt.image.renderable.ParameterBlock;
import java.awt.image.renderable.RenderedImageFactory;
import java.io.FileNotFoundException;
import java.io.InputStream;
import java.lang.reflect.AccessibleObject;
import java.lang.reflect.Method;
import com.lightcrafts.mediax.jai.JAI;
import com.lightcrafts.mediax.jai.OperationRegistry;
import com.lightcrafts.mediax.jai.OpImage;
import com.lightcrafts.mediax.jai.RenderedImageAdapter;
import com.lightcrafts.mediax.jai.registry.RIFRegistry;
import com.lightcrafts.mediax.jai.util.ImagingListener;
import com.lightcrafts.media.jai.codec.FileSeekableStream;
import com.lightcrafts.media.jai.codec.ImageDecodeParam;
import com.lightcrafts.media.jai.codec.SeekableStream;
import com.lightcrafts.media.jai.util.ImageUtil;
/*
* Package-scope class which merely adds a finalize() method to close
* the associated stream and a dispose() method to forward the dispose()
* call if possible.
*/
class StreamImage extends RenderedImageAdapter {
private InputStream stream;
/*
* Create the object and cache the stream.
*/
public StreamImage(RenderedImage image,
InputStream stream) {
super(image);
this.stream = stream;
if(image instanceof OpImage) {
// Set the properties related to TileCache key as used in
// RenderedOp.
setProperty("tile_cache_key", image);
Object tileCache = ((OpImage)image).getTileCache();
setProperty("tile_cache",
tileCache == null ?
java.awt.Image.UndefinedProperty : tileCache);
}
}
public void dispose() {
// Use relection to invoke dispose();
RenderedImage trueSrc = getWrappedImage();
Method disposeMethod = null;
try {
Class cls = trueSrc.getClass();
disposeMethod = cls.getMethod("dispose", null);
if(!disposeMethod.isAccessible()) {
AccessibleObject.setAccessible(new AccessibleObject[] {
disposeMethod
}, true);
}
disposeMethod.invoke(trueSrc, null);
} catch(Exception e) {
// Ignore it.
}
}
/*
* Close the stream.
*/
protected void finalize() throws Throwable {
stream.close();
super.finalize();
}
}
/**
* @see com.lightcrafts.mediax.jai.operator.FileDescriptor
*
* @since EA3
*
*/
public class FileLoadRIF implements RenderedImageFactory {
/** Constructor. */
public FileLoadRIF() {}
/**
* Creates an image from a String containing a file name.
*/
public RenderedImage create(ParameterBlock args,
RenderingHints hints) {
ImagingListener listener = ImageUtil.getImagingListener(hints);
try {
// Create a SeekableStream from the file name (first parameter).
String fileName = (String)args.getObjectParameter(0);
SeekableStream src = null;
try {
src = new FileSeekableStream(fileName);
} catch (FileNotFoundException fnfe) {
// Try to get the file as an InputStream resource. This would
// happen when the application and image file are packaged in
// a JAR file
InputStream is = this.getClass().getClassLoader().getResourceAsStream(fileName);
if (is != null)
src = SeekableStream.wrapInputStream(is, true);
}
ImageDecodeParam param = null;
if (args.getNumParameters() > 1) {
param = (ImageDecodeParam)args.getObjectParameter(1);
}
ParameterBlock newArgs = new ParameterBlock();
newArgs.add(src);
newArgs.add(param);
RenderingHints.Key key = JAI.KEY_OPERATION_BOUND;
int bound = OpImage.OP_IO_BOUND;
if (hints == null) {
hints = new RenderingHints(key, new Integer(bound));
} else if (!hints.containsKey(key)) {
hints = (RenderingHints)hints.clone();
hints.put(key, new Integer(bound));
}
// Get the registry from the hints, if any.
// Don't check for null hints as it cannot be null here.
OperationRegistry registry =
(OperationRegistry)hints.get(JAI.KEY_OPERATION_REGISTRY);
// Create the image using the most preferred RIF for "stream".
RenderedImage image =
RIFRegistry.create(registry, "stream", newArgs, hints);
return image == null ? null : new StreamImage(image, src);
} catch (FileNotFoundException e) {
String message =
JaiI18N.getString("FileLoadRIF0") + args.getObjectParameter(0);
listener.errorOccurred(message, e, this, false);
// e.printStackTrace();
return null;
} catch (Exception e) {
String message = JaiI18N.getString("FileLoadRIF1");
listener.errorOccurred(message, e, this, false);
// e.printStackTrace();
return null;
}
}
}