Last modified: 2010-05-15 15:48:18 UTC

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Bug 9055 - some PNG thumbnails can be discolored
some PNG thumbnails can be discolored
Status: RESOLVED DUPLICATE of bug 8038
Product: MediaWiki
Classification: Unclassified
File management (Other open bugs)
1.9.x
Macintosh Mac OS X 10.0
: Normal normal (vote)
: ---
Assigned To: Nobody - You can work on this!
http://wikidiy.com/mediawiki-1.9.1/in...
:
Depends on:
Blocks:
  Show dependency treegraph
 
Reported: 2007-02-21 19:03 UTC by Travis D
Modified: 2010-05-15 15:48 UTC (History)
0 users

See Also:
Web browser: ---
Mobile Platform: ---
Assignee Huggle Beta Tester: ---


Attachments

Description Travis D 2007-02-21 19:03:15 UTC
Certain, but not all PNG thumbnails can be discolored, as seen here. 

This image:
http://wikidiy.com/mediawiki-1.9.1/index.php/Image:Looking_over_paper_657.png

is RGB, true color, 24 bits

This image:

http://wikidiy.com/mediawiki-1.9.1/index.php/Image:Red_copyright.png

is RGB, indexed color (127 colors), 24 bits. 

Forcing imagecreatetruecolor in Image.php seems to fix the first thumbnail:

     if ( true ) {
          $dst_image = imagecreatetruecolor( $width, $height );

but doesn't work for the second image, possibly because it has a transparent
background. 

I'm unsure if this is related to bugs 6205, 5994 or 234, but is reproducible on
our installation with libpng 1.2.16 and gd 2.0.34.
Comment 1 Rob Church 2007-02-21 21:52:34 UTC
GD is a bit rubbish for this sort of thing; use ImageMagick if possible.
Comment 2 Travis D 2007-02-22 18:00:51 UTC
Great! This seems to fix the issue for me.
Comment 3 Brion Vibber 2007-08-23 19:34:31 UTC
Duping this to bug 8038...

*** This bug has been marked as a duplicate of bug 8038 ***

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