Bug 691246 - jbig2dec doesn't handle 042_25 (inverted symbol region)
Summary: jbig2dec doesn't handle 042_25 (inverted symbol region)
Status: RESOLVED FIXED
Alias: None
Product: jbig2dec
Classification: Unclassified
Component: Missing Feature (show other bugs)
Version: master
Hardware: PC Linux
: P4 normal
Assignee: Alex Cherepanov
URL:
Keywords: bountiable
Depends on:
Blocks:
 
Reported: 2010-04-16 06:03 UTC by Ralph Giles
Modified: 2013-01-28 19:47 UTC (History)
1 user (show)

See Also:
Customer:
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Attachments
Patch to handle inverted symbol region (1.33 KB, patch)
2013-01-23 21:51 UTC, Shailesh Mistry 		Details | Diff
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Description Ralph Giles 2010-04-16 06:03:18 UTC 
jbig2dec doesn't handle the ubc testsuite file 042_25 "Symbol Region, inverted".

The program runs without error:

$ ./jbig2dec ../ubc/042_25.jb2
[no terminal output]

but the resulting image has black and white inverted.

The library should be updated to handle this case.
Comment 1 Shailesh Mistry 2013-01-23 21:51:55 UTC 
Created attachment 9242 [details]
Patch to handle inverted symbol region

The error was due to the combination operator not being propagated and also because the XNOR operator was incorrectly coded.

The attached patch corrects both problems.
Comment 2 Alex Cherepanov 2013-01-27 19:12:49 UTC 
Thank you for contributing to Ghostscript. Your patch has been adopted and
committed as a rev. 07d5a619b525898759a7468631a6cb775edf5bd6 .
Comment 3 Henry Stiles 2013-01-28 19:47:31 UTC 
(In reply to comment #2)
> Thank you for contributing to Ghostscript. Your patch has been adopted and
> committed as a rev. 07d5a619b525898759a7468631a6cb775edf5bd6 .

Please collect the bounty.  Thanks.