[gs-bugs] [Bug 691172] Changes to TIFF in 8.71 result in invalid TIFFG3 files

bugzilla-daemon at ghostscript.com bugzilla-daemon at ghostscript.com
Fri May 21 09:15:10 UTC 2010


http://bugs.ghostscript.com/show_bug.cgi?id=691172

Mats E. Sjöblom <mats.sjoblom at cision.com> changed:

           What    |Removed                     |Added
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                 CC|                            |mats.sjoblom at cision.com

--- Comment #15 from Mats E. Sjöblom <mats.sjoblom at cision.com> 2010-05-21 09:15:06 UTC ---
I have a similiar problem with old GammaFax cards. It's more insidious, though,
as the faxes are sent without signalling errors - but with blank pages.

I did notice one thing, though:
8.70 output: 
Tag 282 (011a: X Resolution), RATIONAL × 1, 204/1 (000000cc/00000001)
Tag 283 (011b: Y Resolution), RATIONAL × 1, 98/1 (00000062/00000001)

8.71 output:
Tag 282 (011a: X Resolution), RATIONAL × 1, 427819008/2097152
(19800000/00200000)
Tag 283 (011b: Y Resolution), RATIONAL × 1, 1644167168/16777216
(62000000/01000000)

My first assumption was that these insane fractions were a byte order problem
affecting Intel implementations, but the X resolution clearly has the right
byte order within the word even though the word order is wrong.

So I changed the resolutions to more sensible fractions using a hex editor.
Still blank pages.

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