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https://issues.apache.org/jira/browse/PDFBOX-2274?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14104393#comment-14104393
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Tilman Hausherr commented on PDFBOX-2274:
-----------------------------------------
{quote}
Another thing I thought about when looking at the code: Should it be ensured in
COSStream.setFilters() that unfilteredStream is not null by decoding the stream
before setting the filter? Otherwise the stream's content is lost and a call of
getFilteredStream() or getUnfilteredStream() would trigger a
NullPointerException.
{quote}
Can't tell... you're welcome to provide some new code that fails (but open a
new issue).
> Decoding issue in PDImageXObject
> --------------------------------
>
> Key: PDFBOX-2274
> URL: https://issues.apache.org/jira/browse/PDFBOX-2274
> Project: PDFBox
> Issue Type: Bug
> Components: PDModel
> Affects Versions: 2.0.0
> Reporter: Dominic Tubach
>
> I'm using JpegFactory to create an PDImageXObject from a content stream.
> There the constrcutor
> {code}
> PDImageXObject(PDDocument document, InputStream filteredStream,
> COSBase cosFilter, int width, int height, int bitsPerComponent,
> PDColorSpace initColorSpace)
> {code}
> is used.
> I've found the following issue:
> The method getUnfilteredStream() of the COSStream in the PDImageXObject
> returns an input stream containing a RandomAccessFileInputStream with
> {{currentPosition = 50814}} and {{endPosition = 1440000}} and my following
> operation fails.
> If the method doDecode() of the COSStream is called before the filter is set
> in the COSStream the input stream returned by getUnfilteredStream() contains
> a RandomAccessFileInputStream with {{currentPosition = 0}} and {{endPosition
> = 50814}} and the result is as expected.
> I've achieved this by adding
> {code}
> getStream().getStream().getDecodeResult();
> {code}
> before
> {code}
> getCOSStream().setItem(COSName.FILTER, cosFilter);
> {code}
> in the PDImageXObject contructor.
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