#36418 [Fbk]: Graphics errors on multiple processes
| From: | pajoye@php.net | Date: | Thu, 16 Feb 2006 15:19:40 +0000 |
| Subject: | #36418 [Fbk]: Graphics errors on multiple processes | ||
| References: | 1 | Groups: | php.bugs |
| Request: | Send a blank email to php-bugs+get-93343@lists.php.net to get a copy of this message | ||
ID: 36418
Updated by: pajoye@php.net
Reported By: jraben at alstermedia dot de
Status: Feedback
Bug Type: GD related
Operating System: Win XP
PHP Version: 5.1.2
New Comment:
Please provide a set of source images and a valid script to reproduce
the problems. That means a working script, valid filenames, source
images, etc.
Previous Comments:
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[2006-02-16 16:10:18] tony2001@php.net
Please try using this CVS snapshot:
http://snaps.php.net/php5.1-latest.tar.gz
For Windows:
http://snaps.php.net/win32/php5.1-win32-latest.zip
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[2006-02-16 15:31:17] jraben at alstermedia dot de
Description:
------------
It's a script that joins a background .gif picture with transparent png
24-bit pictures to a thumb jpg. It actually no the complete script.
$bfile is always the same. $file and $target may vary.
Some files have corrupted backgrounds, if the script is started in
multiple instances at the same time. Seems to be a memory allocation
bug.
Reproduce code:
---------------
$img = @imagecreatefromgif("$bfile");
$imgobj = @imagecreatefrompng("$file");
imagealphablending ( $imgobj, true );
$width = imagesx($imgobj);
$height = imagesy($imgobj);
$imgnew = imagecreatetruecolor($width, $height);
imagecopyresampled($imgnew,$img,0,0,$x,$y,$width,$height,$width,$height);
imagecopyresampled($imgnew,$imgobj,0,0,0,0,$width,$height,$width,$height);
imagejpeg($imgnew, $target, 90);
Expected result:
----------------
Not currupted pictures as .jpg with $bfile gif as background and $file
.png as foreground.
Actual result:
--------------
Some files have corrupted backgrounds, if this script is started in
multiple instances at the same time. Seems to be a memory allocation
bug or something with loading the same picture multiple times at the
same time.
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Edit this bug report at http://bugs.php.net/?id=36418&edit=1