#34131 [NEW]: Artifact left on transparent gifs using image filters

From: mtjo at conninc dot com Operating system: Win 2K PHP version: 5.0.4 PHP Bug Type: GD related Bug description: Artifact left on transparent gifs using image filters Description: ------------ When using the image filters on transparent gif images, it leaves an artifact at x,y:1,1 that is approx 170px long. It appears to be the background color used when the gif is created in a desktop app. This does not affect transparent pngs. This was tested on PHP5.02 and 5.04 with the bundled gd 2.0.28. See http://mike.aplosmedia.com/dev/brightness/test_brightness.php for an example using the brightness filter. Loaded modules: core mod_win32 mpm_winnt http_core mod_so mod_access mod_actions mod_alias mod_asis mod_auth mod_autoindex mod_cgi mod_dir mod_env mod_imap mod_include mod_isapi mod_log_config mod_mime mod_negotiation mod_rewrite mod_setenvif mod_userdir mod_php5 Reproduce code: --------------- <?php header( 'Content-type: image/gif' ); $filename = 'sample.gif'; // any transparent gif $source = imagecreatefromgif( $filename ); imagefilter( $source, IMG_FILTER_GAUSSIAN_BLUR ); // Set background transparent imagecolortransparent( $source, imagecolorat( $source, 1, 1 ) ); imagegif( $source ); imagedestroy( $source ); ?> Expected result: ---------------- The gif image with filtering and a transparent background. Actual result: -------------- The gif image with filtering and a transparent background with the artifact. -- Edit bug report at http://bugs.php.net/?id=34131&edit=1 -- Try a CVS snapshot (php4): http://bugs.php.net/fix.php?id=34131&r=trysnapshot4 Try a CVS snapshot (php5.0): http://bugs.php.net/fix.php?id=34131&r=trysnapshot50 Try a CVS snapshot (php5.1): http://bugs.php.net/fix.php?id=34131&r=trysnapshot51 Fixed in CVS: http://bugs.php.net/fix.php?id=34131&r=fixedcvs Fixed in release: http://bugs.php.net/fix.php?id=34131&r=alreadyfixed Need backtrace: http://bugs.php.net/fix.php?id=34131&r=needtrace Need Reproduce Script: http://bugs.php.net/fix.php?id=34131&r=needscript Try newer version: http://bugs.php.net/fix.php?id=34131&r=oldversion Not developer issue: http://bugs.php.net/fix.php?id=34131&r=support Expected behavior: http://bugs.php.net/fix.php?id=34131&r=notwrong Not enough info: http://bugs.php.net/fix.php?id=34131&r=notenoughinfo Submitted twice: http://bugs.php.net/fix.php?id=34131&r=submittedtwice register_globals: http://bugs.php.net/fix.php?id=34131&r=globals PHP 3 support discontinued: http://bugs.php.net/fix.php?id=34131&r=php3 Daylight Savings: http://bugs.php.net/fix.php?id=34131&r=dst IIS Stability: http://bugs.php.net/fix.php?id=34131&r=isapi Install GNU Sed: http://bugs.php.net/fix.php?id=34131&r=gnused Floating point limitations: http://bugs.php.net/fix.php?id=34131&r=float No Zend Extensions: http://bugs.php.net/fix.php?id=34131&r=nozend MySQL Configuration Error: http://bugs.php.net/fix.php?id=34131&r=mysqlcfg