Java JAI JPEG image encode RuntimeException
I'm trying to build an application that encodes and resize images off any type of image and store it as a JPEG.
I use this kind of weird jpeg and use for testing.
For some reason JAI cannot render this image as a JPEG. I use the following code:
private SeekableStream seekableStream;
...
public RenderedOp builRenderedOp(byte[] bytes) {
seekableStream = SeekableStream.wrapInputStream(new ByteArrayInputStream(bytes),true);
RenderedOp img = JAI.create("stream", seekableStream);
return img ;
}
...
public void writeImageToJPEG(OutputStream out,RenderedOp image,float quality) throws IOException {
JPEGEncodeParam encodeParam = new JPEGEncodeParam();
encodeParam.setQuality(quality);
ImageEncoder encoder = ImageCodec.createImageEncoder("JPEG", out, encodeParam);
encoder.encode(image);
}
on encoder.encode(image)
a RuntimeException
is thrown.
java.lan开发者_JAVA百科g.RuntimeException: - Unable to render RenderedOp for this operation.
at javax.media.jai.RenderedOp.createInstance(RenderedOp.java:838)
at javax.media.jai.RenderedOp.createRendering(RenderedOp.java:878)
at javax.media.jai.RenderedOp.getWidth(RenderedOp.java:2190)
....
Any suggestions?
A RuntimeException
is a wrapper for exceptions. Try using the getCause
to print the stack trace of the actaul exception being thrown:
http://java.sun.com/j2se/1.4.2/docs/api/java/lang/RuntimeException.html
It's also possible this JPEG file isn't supported by the library being used, such as libjpeg
or something related to JPEG 2000 or something out-of-spec.
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