#28147 [Asn->Csd]: Bundled GD2 crashes when antialias is enabled

ID: 28147 Updated by: derick@php.net Reported By: jpgraph at aditus dot nu -Status: Assigned +Status: Closed Bug Type: Reproducible crash Operating System: Linux PHP Version: 4.3.6 Assigned To: derick New Comment: This bug has been fixed in CVS. Snapshots of the sources are packaged every three hours; this change will be in the next snapshot. You can grab the snapshot at http://snaps.php.net/. Thank you for the report, and for helping us make PHP better. Previous Comments: ------------------------------------------------------------------------ [2004-04-25 21:27:51] derick@php.net Verified, and it's indeed an egde-issue. ------------------------------------------------------------------------ [2004-04-25 21:12:28] jpgraph at aditus dot nu Description: ------------ Bundled GD2 in 4.3.4, 4.3.5 and 4.3.6 crashes when antialias is enabled. When antialias is enabled through the imageantialias($img,$flag) function then the Apache process crashes when trying to paint a line at the edge of the image. This is reproducible 100% using Apache 1.3.28 on our setup. If antialias is disabled everything works fine. It seems to be a boundary problem on the edge of the image. See example below. Reproduce code: --------------- <?php // // This script will generate a Seg Fault on Linux // $im = imagecreatetruecolor(300, 300); $w = imagecolorallocate($im, 255, 255, 255); $red = imagecolorallocate($im, 255, 0, 0); imagefilledrectangle($im,0,0,299,299,$w); imageantialias($im,true); imageline($im, 299, 299, 0, 299, $red); header("Content-type: image/png"); imagepng($im); imagedestroy($im); ?> Expected result: ---------------- A line from bottom right corner to bottom left corner. Actual result: -------------- PHP Segmentation fault ------------------------------------------------------------------------ -- Edit this bug report at http://bugs.php.net/?id=28147&edit=1