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https://issues.apache.org/jira/browse/PDFBOX-1067?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13494182#comment-13494182
]
Dave Smith commented on PDFBOX-1067:
------------------------------------
OK. the above patch turns out was SOOO close.
This fixes the problem. Turns out http://code.google.com/p/jbig2-imageio/ was
returning a 8 bit pixel image. So I added a convert method and that did the
trick. I copied the whole code above. JBIG2Filter.java ...
@Override
public void decode( InputStream compressedData, OutputStream result,
COSDictionary options, int filterIndex )
throws IOException
{
Iterator<ImageReader> readers =
ImageIO.getImageReadersByFormatName("JBIG2");
if (!readers.hasNext())
{
log.error( "Can't find an ImageIO plugin to decode the JBIG2
encoded datastream.");
return;
}
ImageReader reader = readers.next();
COSDictionary decodeP = (COSDictionary)
options.getDictionaryObject(COSName.DECODE_PARMS);
COSInteger bits = (COSInteger)
options.getDictionaryObject(COSName.BITS_PER_COMPONENT);
COSStream st = (COSStream)
decodeP.getDictionaryObject(COSName.getPDFName("JBIG2Globals"));
reader.setInput(ImageIO.createImageInputStream(JBIG2StreamMerge(st.getFilteredStream(),compressedData)));
BufferedImage bi = reader.read(0);
reader.dispose();
if ( bi != null )
{
if(bi.getColorModel().getPixelSize() != bits.intValue()) // I
am assuming since JBIG2 is always black and white depending on your renderer
this might or might be needed
{
if(bits.intValue()!=1)
{
log.error("Do not know how to deal with JBIG2
with more than 1 bit");
return;
}
BufferedImage packaedImage = new
BufferedImage(bi.getWidth(), bi.getHeight(), BufferedImage.TYPE_BYTE_BINARY);
packaedImage.getGraphics().drawImage(bi, 0, 0, null);
bi=packaedImage;
}
DataBuffer dBuf = bi.getData().getDataBuffer();
if ( dBuf.getDataType() == DataBuffer.TYPE_BYTE )
{
result.write( ( ( DataBufferByte ) dBuf ).getData() );
}
else
{
log.error( "Image data buffer not of type byte but type " +
dBuf.getDataType() );
}
}
else
{
log.error( "Something went wrong when decoding the JBIG2 encoded
datastream.");
}
}
// ugly. Should use some sort of stream merge ...
protected static InputStream JBIG2StreamMerge(InputStream
globals,InputStream body)
throws IOException
{
ByteArrayOutputStream out = new ByteArrayOutputStream();
byte buf[] = new byte[1024];
int read = globals.read(buf);
while(read != -1)
{
out.write(buf, 0, read);
read = globals.read(buf);
}
read = body.read(buf);
while(read != -1)
{
out.write(buf, 0, read);
read = body.read(buf);
}
out.close();
return new ByteArrayInputStream(out.toByteArray());
}
> PDF Scan from Xerox WorkCentre 5030 renders as all black
> --------------------------------------------------------
>
> Key: PDFBOX-1067
> URL: https://issues.apache.org/jira/browse/PDFBOX-1067
> Project: PDFBox
> Issue Type: New Feature
> Components: PDModel
> Affects Versions: 1.6.0
> Environment: Tested on MacOS X 10.6.7, Ubuntu 10.10, Windows 7
> Reporter: Sarah Kelley
> Labels: JBIG2
> Attachments: ItDoesntWorkScan.jbig2, ItDoesntWorkScan.pdf,
> sakelley_pdf_rendering_problem.zip
>
>
> The file "ItDoesntWorkScan.pdf" renders to an empty
> black page. This file is a copy of "ItDoesntWorkPrinted.pdf"
> that has been printed on paper, and then scanned with
> a Xerox WorkCentre 5030 scanner, which then emails a pdf file
> back to the user.
> Tested On:
> - Mac OS 10.6
> - Windows 7
> - Ubuntu 10.10
> Unfortunately, the WorkCentre 5030 doesn't appear to have
> many user-settable options for scanning to PDF, so we weren't
> really able to try scanning with settings other than the defaults.
> Will attach pdf and code to demonstrate.
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