From: jraben at alstermedia dot de
Operating system: Win XP
PHP version: 5.1.2
PHP Bug Type: *Graphics related
Bug description: Graphics errors on multiple processes
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.
--
Edit bug report at http://bugs.php.net/?id=36418&edit=1
--
Try a CVS snapshot (PHP 4.4):
http://bugs.php.net/fix.php?id=36418&r=trysnapshot44
Try a CVS snapshot (PHP 5.1):
http://bugs.php.net/fix.php?id=36418&r=trysnapshot51
Try a CVS snapshot (PHP 6.0):
http://bugs.php.net/fix.php?id=36418&r=trysnapshot60
Fixed in CVS: http://bugs.php.net/fix.php?id=36418&r=fixedcvs
Fixed in release:
http://bugs.php.net/fix.php?id=36418&r=alreadyfixed
Need backtrace: http://bugs.php.net/fix.php?id=36418&r=needtrace
Need Reproduce Script: http://bugs.php.net/fix.php?id=36418&r=needscript
Try newer version: http://bugs.php.net/fix.php?id=36418&r=oldversion
Not developer issue: http://bugs.php.net/fix.php?id=36418&r=support
Expected behavior: http://bugs.php.net/fix.php?id=36418&r=notwrong
Not enough info:
http://bugs.php.net/fix.php?id=36418&r=notenoughinfo
Submitted twice:
http://bugs.php.net/fix.php?id=36418&r=submittedtwice
register_globals: http://bugs.php.net/fix.php?id=36418&r=globals
PHP 3 support discontinued: http://bugs.php.net/fix.php?id=36418&r=php3
Daylight Savings: http://bugs.php.net/fix.php?id=36418&r=dst
IIS Stability: http://bugs.php.net/fix.php?id=36418&r=isapi
Install GNU Sed: http://bugs.php.net/fix.php?id=36418&r=gnused
Floating point limitations: http://bugs.php.net/fix.php?id=36418&r=float
No Zend Extensions: http://bugs.php.net/fix.php?id=36418&r=nozend
MySQL Configuration Error: http://bugs.php.net/fix.php?id=36418&r=mysqlcfg
