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Posted to dev@pdfbox.apache.org by "Andreas Lehmkühler (JIRA)" <ji...@apache.org> on 2013/02/10 13:49:13 UTC
[jira] [Commented] (PDFBOX-1475) Exception thrown during rendering
page if /DecodeParms specified indirectly (like [9 0 R]) in XObject/Image
[ https://issues.apache.org/jira/browse/PDFBOX-1475?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13575428#comment-13575428 ]
Andreas Lehmkühler commented on PDFBOX-1475:
--------------------------------------------
Thanks for your contribution Alexey. At least your solution is the same than mine .... but I guess mine is a little bit more elegant ;-)
> Exception thrown during rendering page if /DecodeParms specified indirectly (like [9 0 R]) in XObject/Image
> -----------------------------------------------------------------------------------------------------------
>
> Key: PDFBOX-1475
> URL: https://issues.apache.org/jira/browse/PDFBOX-1475
> Project: PDFBox
> Issue Type: Bug
> Components: PDModel
> Affects Versions: 1.7.0, 1.7.1
> Environment: Not important
> Reporter: Alexey Gavrilov
> Assignee: Andreas Lehmkühler
> Labels: DecodeParms, Image, XObject
> Fix For: 1.8.0
>
> Attachments: CCITTFaxDecodeFilter.java, Exception info.jpg, PDCcitt.java, TC11.pdf
>
>
> PROBLEM:
> Exception is thrown during rendering TC11.pdf. Empty image is generated.
> TEST:
> java -jar pdfbox-app-1.7.1.jar PDFToImage -resolution 300 TC11.pdf
> DETAILS:
> There are 2 objects in TC11.pdf.
> . . .
> Object 7:
> <<
>
> /Type /XObject
> /Subtype /Image
> /Width 2496
> /Height 3504
> /BitsPerComponent 1
> /ColorSpace /DeviceGray
> /Filter [/CCITTFaxDecode]
> /DecodeParms [9 0 R]
> /Length 10 0 R
> >>
> . . .
> Object 9:
> <<
>
> /Columns 2496
> /Rows 3504
> /K -1
> /BlackIs1 false
> >>
> . . .
> when rendering the page exception is thrown as the library doesn't resolve indirect reference to object 9 for /DecodeParms.
> RESOLUTION:
> I can specify what is to be changed in CCITTFaxDecoderFilter.java and PDCcitt.java to resolve the issue.
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