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Posted to dev@pdfbox.apache.org by "Andreas Lehmkühler (Resolved JIRA)" <ji...@apache.org> on 2012/03/11 14:59:58 UTC
[jira] [Resolved] (PDFBOX-1233) CCITTFaxG31DDecodeInputStream -
Extended codes have wrong length
[ https://issues.apache.org/jira/browse/PDFBOX-1233?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Andreas Lehmkühler resolved PDFBOX-1233.
----------------------------------------
Resolution: Fixed
Fix Version/s: 1.7.0
Assignee: Andreas Lehmkühler
I was able to double check the patch using a sample pdf Dave sent me in private as it is confidential.
I added the patch in revision 1299358 as proposed.
Thanks for the contribution!
> CCITTFaxG31DDecodeInputStream - Extended codes have wrong length
> ----------------------------------------------------------------
>
> Key: PDFBOX-1233
> URL: https://issues.apache.org/jira/browse/PDFBOX-1233
> Project: PDFBox
> Issue Type: Bug
> Reporter: Dave Smith
> Assignee: Andreas Lehmkühler
> Fix For: 1.7.0
>
>
> When dealing with large fax images there are Extended Make Up Codes.
> They are added to the tree as ...
> buildUpMakeUp(LONG_MAKE_UP, WHITE_LOOKUP_TREE_ROOT);
> buildUpMakeUp(LONG_MAKE_UP, BLACK_LOOKUP_TREE_ROOT);
> Accept, the length is 0 based not starting at 1792.
> The quick hack is to create a new method so the length of the node is correct
> private static void buildUpMakeUpLong(short[] codes,
> NonLeafLookupTreeNode root)
> {
> for (int len = 0, c = codes.length; len < c; len++)
> {
> LookupTreeNode leaf = new MakeUpTreeNode((len + 28) * 64);
> addLookupTreeNode(codes[len], root, leaf);
> }
> }
> as thus ...
> buildUpMakeUpLong(LONG_MAKE_UP, WHITE_LOOKUP_TREE_ROOT);
> buildUpMakeUpLong(LONG_MAKE_UP, BLACK_LOOKUP_TREE_ROOT);
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