#33125 [NEW]: imagecopymergegray produces mosaic rainbow effect

From: thomas at krantz dot com Operating system: Linux PHP version: 4.3.11 PHP Bug Type: *Graphics related Bug description: imagecopymergegray produces mosaic rainbow effect Description: ------------ When merging two images, one normal and the other one completely black, the output from imagecopymergegray produces a weird looking mosaic of the first. Reproduce code: --------------- <?php $imPng = imagecreatefrompng("Tiles/Bamboo/9.png"); $imSrc = imagecreatefrompng("Tiles/Bamboo/black.png"); $height = imagesy($imPng); imagecopymergegray($imPng, $imSrc, 0, 0, 0, 0, $height, $height, 50); header("Content-type: image/png"); imagePng($imPng); ?> See also http://www.tilehog.net/prepermission/showbug.html Expected result: ---------------- The original image should be darkened by 50%. This was the result in the earlier version (4.3.10). Actual result: -------------- http://www.tilehog.net/prepermission/showbug.html -- Edit bug report at http://bugs.php.net/?id=33125&edit=1 -- Try a CVS snapshot (php4): http://bugs.php.net/fix.php?id=33125&r=trysnapshot4 Try a CVS snapshot (php5.0): http://bugs.php.net/fix.php?id=33125&r=trysnapshot50 Try a CVS snapshot (php5.1): http://bugs.php.net/fix.php?id=33125&r=trysnapshot51 Fixed in CVS: http://bugs.php.net/fix.php?id=33125&r=fixedcvs Fixed in release: http://bugs.php.net/fix.php?id=33125&r=alreadyfixed Need backtrace: http://bugs.php.net/fix.php?id=33125&r=needtrace Need Reproduce Script: http://bugs.php.net/fix.php?id=33125&r=needscript Try newer version: http://bugs.php.net/fix.php?id=33125&r=oldversion Not developer issue: http://bugs.php.net/fix.php?id=33125&r=support Expected behavior: http://bugs.php.net/fix.php?id=33125&r=notwrong Not enough info: http://bugs.php.net/fix.php?id=33125&r=notenoughinfo Submitted twice: http://bugs.php.net/fix.php?id=33125&r=submittedtwice register_globals: http://bugs.php.net/fix.php?id=33125&r=globals PHP 3 support discontinued: http://bugs.php.net/fix.php?id=33125&r=php3 Daylight Savings: http://bugs.php.net/fix.php?id=33125&r=dst IIS Stability: http://bugs.php.net/fix.php?id=33125&r=isapi Install GNU Sed: http://bugs.php.net/fix.php?id=33125&r=gnused Floating point limitations: http://bugs.php.net/fix.php?id=33125&r=float No Zend Extensions: http://bugs.php.net/fix.php?id=33125&r=nozend MySQL Configuration Error: http://bugs.php.net/fix.php?id=33125&r=mysqlcfg