Edit report at http://bugs.php.net/bug.php?id=50610&edit=1
ID: 50610
Comment by: contact at rnmail dot de
Reported by: ceo at l-i-e dot com
Summary: imagerotate transparent gif some angles invert new
background
Status: Assigned
Type: Bug
Package: GD related
Operating System: *
PHP Version: 5.*, 6
Assigned To: pajoye
Block user comment: N
Private report: N
New Comment:
Fix in sight?
Previous Comments:
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[2009-12-31 18:00:33] [email protected]
So it seems.
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[2009-12-31 00:52:08] ceo at l-i-e dot com
Adding imagesavealpha($rotated, 1); at line 7, immediately after
imagerotate but before imagegif does not have any visible effect.
I.e., it's still broken.
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[2009-12-30 23:51:01] [email protected]
How about bug #41624 ?
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[2009-12-30 17:12:02] ceo at l-i-e dot com
I have confirmed this bug remains in 5.3.2-dev on a localhost box.
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[2009-12-30 05:59:51] ceo at l-i-e dot com
Description:
------------
imagerotate for a transparent input GIF, trying to output a transparent
output GIF.
At various angles it will fill the new / expanded background with the
wrong (non-transparent black) color.
This may be the same as http://bugs.php.net/bug.php?id=44429 but I can't
tell without the other guy's image either...
It could also be related to http://bugs.php.net/bug.php?id=39366
somehow, but that pre-dates this quite a bit, and is supposedly fixed in
CVS (now SVN). Plus that's PNG not GIF, though there may be shared code
at work.
I do have a nice repro for you below.
NOTE:
This happened to me in PHP 5.2.5, and it's conceivable that it has been
fixed, but it has also been confirmed in 5.2.6 by Jochem Maas:
[quote]
I tested on PHP5.2.6, with the following GD installed:
GD Version bundled (2.0.34 compatible)
FreeType Support enabled
FreeType Linkage with freetype
FreeType Version 2.3.7
GIF Read Support enabled
GIF Create Support enabled
JPG Support enabled
PNG Support enabled
WBMP Support enabled
XPM Support enabled
XBM Support enabled
I get the same result as you. I played with it a bit and the issue
'seems' to revolve
around transparency in the original gif. I got the following code to
output what you
want but I have no idea if it's usable for you (you may be relying on
the
transparency in
the original gif):
Reproduce code:
---------------
http://www.6112northwolcott.com/dogfight/rotate.phps
Expected result:
----------------
All the images in the actual result should have white / transparent
backgrounds, unless I'm being particularly dense today.
Actual result:
--------------
http://www.6112northwolcott.com/dogfight/rotate.htm
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Edit this bug report at http://bugs.php.net/bug.php?id=50610&edit=1
