[PDFBOX-2204] Indexed color space in JPX

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.0.0
• Fix Version/s: 2.0.0
• Component/s: Rendering
• Labels: JPEG2000 JPXDecode JPXFilter
• Assignee: John Hewson
• Reporter: Tilman Hausherr
• Created: 12/Jul/14 12:52
• Updated: 29/Sep/18 11:46
• Resolved: 11/Aug/15 03:17

Description

I get this with the attached file on page 11:

java.lang.ArrayIndexOutOfBoundsException: 8296
	at org.apache.pdfbox.pdmodel.graphics.image.SampledImageReader.from8bit(SampledImageReader.java:253)
	at org.apache.pdfbox.pdmodel.graphics.image.SampledImageReader.getRGBImage(SampledImageReader.java:146)
	at org.apache.pdfbox.pdmodel.graphics.image.PDImageXObject.getImage(PDImageXObject.java:188)
	at org.apache.pdfbox.util.operator.pagedrawer.Invoke.process(Invoke.java:80)

The problem is in JPXFilter. Per the spec, we must ignore the BITS_PER_COMPONENT value from the PDF and use the one from the image. We set BITS_PER_COMPONENT to 8 because colorModel.getComponentSize(0) is 8. colorModel.getPixelSize() is 4. In "normal" images, the sum of the colorModel.getComponentSize() values equals colorModel.getPixelSize().

I'm not sure what to do. I am using this code locally:

            ColorModel colorModel = image.getColorModel();
            int pixelSize = colorModel.getPixelSize();
            int[] componentSize = colorModel.getComponentSize();
            if (pixelSize < componentSize[0])
            {
                LOG.warn("componentSize[0] of image ignored, because pixelSize < componentSize[0]");
                LOG.warn("pixelSize: " + pixelSize);
                LOG.warn("componentSize.length " + componentSize.length);
                for (int i = 0; i < componentSize.length; ++i)
                {
                    LOG.warn("componentSize[" + i + "]: " + componentSize[i]);
                }
            }
            else
            {
                parameters.setInt(COSName.BITS_PER_COMPONENT, componentSize[0]);
            }

and now the PDF renders properly and the image at the bottom right is almost correct. (A circle on the left is missing)

Issue Links

• is related to: PDFBOX-4326 PDF with JPEG2000 image can't be rendered