#28506 [Opn->Csd]: imagearc() doesn't like negative value of the s parameter

ID: 28506 Updated by: pajoye@php.net Reported By: tony2001 at phpclub dot net -Status: Open +Status: Closed Bug Type: GD related Operating System: Linux 2.4.23 PHP Version: 5CVS-2004-05-24 (dev) -Assigned To: +Assigned To: pajoye 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. while (s < 0) s += 360 is used now. --Pierre Previous Comments: ------------------------------------------------------------------------ [2004-05-24 14:49:15] tony2001 at phpclub dot net Description: ------------ imagearc() draws broken arc, when using negative value as s parameter. It could be GDlib bug, at least I found a couple of words in GD man: http://www.boutell.com/gd/manual2.0.23.html about unspecified bugs in gdImageArc(). Also, there can be simple workaround: just don't accept negative values, reduce them to zero. Reproduce code: --------------- // result image is here: http://tony2001.phpclub.net/temp/imagearc.png // // create a 200*200 image $img = imagecreate(200, 200); // allocate some colors $white = imagecolorallocate($img, 255, 255, 255); $black = imagecolorallocate($img, 0, 50, 200); // draw a white circle imagearc($img, 100, 100, 150, 150, -1, 200, $black); // output image in the browser header("Content-type: image/png"); imagepng($img); // free memory imagedestroy($img); Expected result: ---------------- a flat arc Actual result: -------------- a broken arc with some crosslines ------------------------------------------------------------------------ -- Edit this bug report at http://bugs.php.net/?id=28506&edit=1