#27582 [Ver->Csd]: ImageFillToBorder act weird with alpha channel on alphablending image

ID: 27582 Updated by: pajoye@php.net Reported By: panda dot management at free dot fr -Status: Verified +Status: Closed Bug Type: GD related Operating System: Windows XP PHP Version: 4.3.5RC3 -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. This bug is fixed in HEAD (php5). It will be fixed too in php4 (PHP_4_3) later this weekend. thanks for the small reproduce script, pierre Previous Comments: ------------------------------------------------------------------------ [2004-03-13 05:10:55] pajoye@php.net Hello, Verified with HEAD. Segfault in libgd function, infinite recursion. I will try to fix it asap. pierre ------------------------------------------------------------------------ [2004-03-13 05:03:55] sniper@php.net Please try using this CVS snapshot: http://snaps.php.net/php4-STABLE-latest.tar.gz For Windows: http://snaps.php.net/win32/php4-win32-STABLE-latest.zip ------------------------------------------------------------------------ [2004-03-12 18:52:27] panda dot management at free dot fr Description: ------------ Hello! ImageFillToBorder seems to act strangely (no output) when using alpha channel (?) on color and / or bordercolor values, on an alphablending image. Configuration: ************** winxp apache 2.0.48 php 4.3.4 / 4.3.5RC3 gd2 module loaded Reproduce code: --------------- <?php $im = ImageCreateTrueColor(10, 10); imagealphablending($im, true); imagesavealpha($im, false); $bordercolor=ImageColorAllocateAlpha($im, 0, 0, 0, 2); $color = ImageColorAllocateAlpha($im, 0, 0, 0, 1); ImageFillToBorder($im, 5, 5, $bordercolor, $color); ?> Expected result: ---------------- Do work as supposed to, or output some error. Actual result: -------------- Actual result: ************** Browser hangs and output an alert "Document contains no data". I'm not experienced enough to give you more debug details... but it obviously break something... Additionnal comment: ************** The values that trigger the bug seems to be pretty much random. You can reproduce the problem with: $bordercolor=ImageColorAllocateAlpha($im, 0, 254, 0, 0); $color = ImageColorAllocateAlpha($im, 0, 255, 255, 75); Or even reproduce it with: $bordercolor=ImageColorAllocate($im, 0, 254, 0); $color = ImageColorAllocateAlpha($im, 0, 255, 255, 75); (wich is much more logical on an alphablending image...) But odly it works ok with: $bordercolor=ImageColorAllocateAlpha($im, 0, 0, 0, 0); $color = ImageColorAllocateAlpha($im, 0, 255, 255, 75); I can't find any coherence in the problematic values, except that they involve alpha channel. If this is a doc problem, or if I missed something, please forgive this report... Anyway, long life to php. Olivier ------------------------------------------------------------------------ -- Edit this bug report at http://bugs.php.net/?id=27582&edit=1