using JAI to create a thu

From	"mlevin" <mlevin@THRWHITE.remove-dii-this>
Subject	using JAI to create a thu
Message-ID	<1178377882.053099.72580@p77g2000hsh.googlegroups.com> (permalink)
Newsgroups	comp.lang.java.gui
Date	2011-04-27 15:34 +0000
Organization	TDS.net

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  To: comp.lang.java.programmer
I'm trying to use JAI to create a thumbnail of a JPEG and no matter
what I do, I keep getting the following stack trace:

exception

javax.servlet.ServletException: All factories fail for the operation
"encode"
	
org.apache.struts.action.RequestProcessor.processException(RequestProcessor.java:
523)
	
org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:
421)
	
org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:
224)
	org.apache.struts.action.ActionServlet.process(ActionServlet.java:
1194)
	org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:432)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:709)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:802)

root cause

javax.media.jai.util.ImagingException: All factories fail for the
operation "encode"
	
javax.media.jai.OperationRegistry.invokeFactory(OperationRegistry.java:
1687)
	
javax.media.jai.ThreadSafeOperationRegistry.invokeFactory(ThreadSafeOperationRegistry.java:
473)
	javax.media.jai.registry.RIFRegistry.create(RIFRegistry.java:332)
	javax.media.jai.RenderedOp.createInstance(RenderedOp.java:819)
	javax.media.jai.RenderedOp.createRendering(RenderedOp.java:867)
	javax.media.jai.RenderedOp.getRendering(RenderedOp.java:888)
	javax.media.jai.JAI.createNS(JAI.java:1099)
	javax.media.jai.JAI.create(JAI.java:973)
	javax.media.jai.JAI.create(JAI.java:1395)
	UploadAction.resizeImage(UploadAction.java:111)
	UploadAction.execute(UploadAction.java:71)
	
org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:
419)
	
org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:
224)
	org.apache.struts.action.ActionServlet.process(ActionServlet.java:
1194)
	org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:432)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:709)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:802)

root cause

java.io.IOException: reading encoded JPEG Stream
	sun.awt.image.codec.JPEGImageEncoderImpl.writeJPEGStream(Native
Method)
	
sun.awt.image.codec.JPEGImageEncoderImpl.encode(JPEGImageEncoderImpl.java:
472)
	
sun.awt.image.codec.JPEGImageEncoderImpl.encode(JPEGImageEncoderImpl.java:
228)
	
com.sun.media.jai.codecimpl.JPEGImageEncoder.encode(JPEGImageEncoder.java:
277)
	com.sun.media.jai.opimage.EncodeRIF.create(EncodeRIF.java:70)
	sun.reflect.GeneratedMethodAccessor51.invoke(Unknown Source)
	
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:
25)
	java.lang.reflect.Method.invoke(Method.java:585)
	javax.media.jai.FactoryCache.invoke(FactoryCache.java:122)
	
javax.media.jai.OperationRegistry.invokeFactory(OperationRegistry.java:
1674)
	
javax.media.jai.ThreadSafeOperationRegistry.invokeFactory(ThreadSafeOperationRegistry.java:
473)
	javax.media.jai.registry.RIFRegistry.create(RIFRegistry.java:332)
	javax.media.jai.RenderedOp.createInstance(RenderedOp.java:819)
	javax.media.jai.RenderedOp.createRendering(RenderedOp.java:867)
	javax.media.jai.RenderedOp.getRendering(RenderedOp.java:888)
	javax.media.jai.JAI.createNS(JAI.java:1099)
	javax.media.jai.JAI.create(JAI.java:973)
	javax.media.jai.JAI.create(JAI.java:1395)
	UploadAction.resizeImage(UploadAction.java:111)
	UploadAction.execute(UploadAction.java:71)
	
org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:
419)
	
org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:
224)
	org.apache.struts.action.ActionServlet.process(ActionServlet.java:
1194)
	org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:432)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:709)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:802)

The code I'm using is cobbled together from several examples and
clearly I'm not doing something right. Here's what I've got so far:

import java.awt.RenderingHints;
import java.awt.image.BufferedImage;
import java.awt.image.renderable.ParameterBlock;
import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;

import javax.media.jai.Interpolation;
import javax.media.jai.JAI;
import javax.media.jai.OpImage;
import javax.media.jai.RenderedOp;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.struts.action.Action;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;

import com.sun.media.jai.codec.JPEGEncodeParam;
import com.sun.media.jai.codec.PNGEncodeParam;
import com.sun.media.jai.codec.SeekableStream;

public class UploadAction extends Action {

	public ActionForward execute(ActionMapping mapping, ActionForm form,
HttpServletRequest request, HttpServletResponse response) throws
IOException {

		String basePath = "C:\\Program Files\\Apache Software Foundation\
\Tomcat 5.5\\webapps\\strutsTest\\";

		UploadForm upload = (UploadForm) form;

		if (upload.getFile() != null) {
			/*
			 *
			 *
			 *
			 *
			 *
			 */

			// open input stream from uploaded file and copy into byte array
			InputStream is = new
BufferedInputStream(upload.getFile().getInputStream());
			ByteArrayOutputStream bos = new ByteArrayOutputStream();
			int bytesRead = 0;
			byte[] buffer = new byte[8192];
			while ((bytesRead = is.read(buffer, 0, 8192)) != -1) {
				bos.write(buffer, 0, bytesRead);
			}
			bos.close();
			is.close();
			byte[] image = bos.toByteArray();

			// write original (unresized) file
			OutputStream os = new BufferedOutputStream(new
FileOutputStream(basePath + upload.getFile().getFileName()));
			ByteArrayInputStream bis = new ByteArrayInputStream(image);
			bytesRead = 0;
			buffer = new byte[8192];
			while ((bytesRead = bis.read(buffer, 0, 8192)) != -1) {
				os.write(buffer, 0, bytesRead);
			}
			os.close();

			// resize image
			bis.reset();
			OutputStream osThumb = new BufferedOutputStream(new
FileOutputStream(basePath + "THUMB_" +
upload.getFile().getFileName()));
			resizeImage(bis, os, 150, 150);
			osThumb.close();

			// close input stream
			bis.close();

		}

		return mapping.findForward("success");

	}

	// based on code examples from http://www.i-proving.ca/space/Technologies/Java+Advanced+Imaging,
http://forums.java.net/jive/thread.jspa?messageID=64672 and
http://archives.java.sun.com/cgi-bin/wa?A2=ind0208&L=java-imageio-interest&P=242
	private void resizeImage(InputStream is, OutputStream os, int width,
int height) {

		// read in the original image from an input stream
		SeekableStream s = SeekableStream.wrapInputStream(is, true);
		RenderedOp image = JAI.create("stream", s);
		((OpImage) image.getRendering()).setTileCache(null);

		// now resize the image
		double hRatio = ((double) height) / ((double) image.getHeight());
		double wRatio = ((double) width) / ((double) image.getWidth());
		double scale = Math.min(hRatio, wRatio);
		ParameterBlock pb = new ParameterBlock();
		pb.addSource(image).add(scale).add(scale);
		pb.add(Interpolation.getInstance(Interpolation.INTERP_BICUBIC));
		RenderingHints qualityHints = new
RenderingHints(RenderingHints.KEY_RENDERING,
RenderingHints.VALUE_RENDER_QUALITY);
		RenderedOp resizedImage = JAI.create("SubsampleAverage", pb,
qualityHints);

		// lastly, write the newly-resized image to an
		// output stream, in a specific encoding
		pb = new ParameterBlock();
		BufferedImage bi = resizedImage.getAsBufferedImage();
		pb.addSource(bi);
		pb.add(os);
		pb.add("jpeg");
		JPEGEncodeParam ep = new JPEGEncodeParam();
		ep.setQuality(0.75f);
		pb.add(ep);
		JAI.create("encode", pb);

	}

}

Any suggestions? I'm baffled.

Thanks

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using JAI to create a thu "mlevin" <mlevin@THRWHITE.remove-dii-this> - 2011-04-27 15:34 +0000
  Re: using JAI to create a "Andrew Thompson" <andrew.thompson@THRWHITE.remove-dii-this> - 2011-04-27 15:34 +0000

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