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https://issues.apache.org/jira/browse/PDFBOX-1983?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13936348#comment-13936348
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John Hewson commented on PDFBOX-1983:
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Yes, ximage.getImage() should be returning an image. I took a look at this and
it was a caused by a combination of the way that JPEGFactory and CCITTFactory
use PDStream, the fact that PDStream performs caching when it probably
shouldn't, and the fact that COSStream#getLength() returns the dictionay value
and not the current stream length.
There's a fundamental problem here which is that COSStream allows its stream to
be written to but does not return the length in getLength. I think that the
fact that the underlying stream can be manipulated by classes outside of
COSStream is the issue. COSStream has no way to know when its stream has been
modified! I think we need to rethink the design of this at some point, it looks
like COSStream should subclass InputStream and/or OutputStream so that it knows
when the stream is being manipulated, rather than just returning e.g. an
InputStream which anyone can mess with via e.g. getFilteredStream().
Anyway, I've basically just added a workaround in 1577959 to sidestep the
problem for now and enabled the portions of the tests which were commented out.
> Unable to add TIF images, CCITTFactory not working
> --------------------------------------------------
>
> Key: PDFBOX-1983
> URL: https://issues.apache.org/jira/browse/PDFBOX-1983
> Project: PDFBox
> Issue Type: Bug
> Components: PDModel
> Affects Versions: 2.0.0
> Reporter: Joel Kääpä
> Assignee: Tilman Hausherr
> Fix For: 2.0.0
>
> Attachments: G4.tif, huhu.pdf
>
>
> As used in the AddImageToPDF example, the following line generates an error
> with tif image:
> PDImageXObject ximage = CCITTFactory.createFromRandomAccess(document, new
> RandomAccessFile(new File(imagePath), "r"));
> java.io.IOException: Stream was not read
> at org.apache.pdfbox.cos.COSStream.getDecodeResult(COSStream.java:235)
> at
> org.apache.pdfbox.pdmodel.graphics.image.PDImageXObject.<init>(PDImageXObject.java:80)
> at
> org.apache.pdfbox.pdmodel.graphics.image.PDImageXObject.<init>(PDImageXObject.java:70)
> at
> org.apache.pdfbox.pdmodel.graphics.image.CCITTFactory.createFromRandomAccess(CCITTFactory.java:50)
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