/**
* 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;
}
}