Batik rasterizer creates blank JPEG files

[Paul Warner]

Hello,

I am a newbie, trying out Batik to learn how it works.
 I am running it on Redhat 8.0.  

When trying to create jpegs from svg files, the
rasterizer creates only blank or empty files.  This is
true from the command line utility or the included
java example app.  However, the command line utility
works correctly when creating png files.

command line example:
java -jar batik-rasterizer.jar -d /home/paul/ -m
image/jpeg samples/anne.svg

(substituting image/png produces a viewable .png file)

the sample code comes from:
http://xml.apache.org/batik/rasterizerTutorial.html

SaveAsJPEGTiles.java
====================

import java.io.*;
import java.awt.*;
import
org.apache.batik.transcoder.image.JPEGTranscoder;
import org.apache.batik.transcoder.TranscoderInput;
import org.apache.batik.transcoder.TranscoderOutput;

public class SaveAsJPEGTiles {

    JPEGTranscoder trans = new JPEGTranscoder();

    public SaveAsJPEGTiles() {
       
trans.addTranscodingHint(JPEGTranscoder.KEY_QUALITY,
                                 new Float(.8));
    }

    public void tile(String inputFilename,
                     String outputFilename,
                     Rectangle aoi) throws Exception {
       
trans.addTranscodingHint(JPEGTranscoder.KEY_WIDTH,
                                 new
Float(aoi.width));
       
trans.addTranscodingHint(JPEGTranscoder.KEY_HEIGHT,
                                 new
Float(aoi.height));
       
trans.addTranscodingHint(JPEGTranscoder.KEY_AOI, aoi);
        String svgURI = new
File(inputFilename).toURL().toString();
        TranscoderInput input = new
TranscoderInput(svgURI);
        OutputStream ostream = new
FileOutputStream(outputFilename);
        TranscoderOutput output = new
TranscoderOutput(ostream);
        trans.transcode(input, output);
        ostream.flush();
        ostream.close();
    }

    public static void main(String [] args) throws
Exception {
        SaveAsJPEGTiles p = new SaveAsJPEGTiles();
        String in = "samples/anne.svg";
        int documentWidth = 450;
        int documentHeight = 500;
        int dw2 = documentWidth / 2;
        int dh2 = documentHeight / 2;
        p.tile(in, "tileTopLeft.jpg", new Rectangle(0,
0, dw2, dh2));
        p.tile(in, "tileTopRight.jpg", new
Rectangle(dw2, 0, dw2, dh2));
        p.tile(in, "tileBottomLeft.jpg", new
Rectangle(0, dh2, dw2, dh2));
        p.tile(in, "tileBottomRight.jpg", new
Rectangle(dw2, dh2, dw2, dh2));
        System.exit(0);
    }
}


Thanks,
Paul Warner

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