Bug #55545 [NEW]: imagettftext() antialiasing depends on color allocation order

From: Operating system: Windows XP, 32bit PHP version: 5.3.8 Package: GD related Bug Type: Bug Bug description:imagettftext() antialiasing depends on color allocation order Description: ------------ GD version: bundled (2.0.34 compatible) Using a negative $color parameter for imagettftext() does not produce antialiased text if the image is created with imagecreate() (as opposed to imagecreatetruecolor()) and the text color is the first color allocated. I have not looked into this but I suppose the first color recieves an index of 0, thus a test for <0 always fails and antialiasing is never used. Using a negative color index is a really awful hack. imagettftext() should receive an additional parameter instead. Test script: --------------- <?php $im = imagecreate(210, 50); $background_color = imagecolorallocate($im, 0, 0, 0); $text_color = imagecolorallocate($im, 255, 255, 255); imagefilledrectangle($im, 0, 0, 209, 49, $background_color); imagettftext($im, 20, 0, 10, 20, -$text_color, "arial.ttf", "Antialiasing"); imagetruecolortopalette($im, FALSE, 255); imagepng($im, "as_intended.png"); imagedestroy($im); $im = imagecreate(210, 50); $text_color = imagecolorallocate($im, 255, 255, 255); $background_color = imagecolorallocate($im, 0, 0, 0); imagefilledrectangle($im, 0, 0, 209, 49, $background_color); imagettftext($im, 20, 0, 10, 20, -$text_color, "arial.ttf", "Antialiasing"); imagetruecolortopalette($im, FALSE, 255); imagepng($im, "not_as_intended.png"); imagedestroy($im); ?> Expected result: ---------------- The script should produce two identical PNG images with not antialiased text. Actual result: -------------- The image as_intended.png shows the expected result whereas not_as_intended.png shows antialiased text where the text should not be antialiased. -- Edit bug report at https://bugs.php.net/bug.php?id=55545&edit=1 -- Try a snapshot (PHP 5.4): https://bugs.php.net/fix.php?id=55545&r=trysnapshot54 Try a snapshot (PHP 5.3): https://bugs.php.net/fix.php?id=55545&r=trysnapshot53 Try a snapshot (trunk): https://bugs.php.net/fix.php?id=55545&r=trysnapshottrunk Fixed in SVN: https://bugs.php.net/fix.php?id=55545&r=fixed Fixed in SVN and need be documented: https://bugs.php.net/fix.php?id=55545&r=needdocs Fixed in release: https://bugs.php.net/fix.php?id=55545&r=alreadyfixed Need backtrace: https://bugs.php.net/fix.php?id=55545&r=needtrace Need Reproduce Script: https://bugs.php.net/fix.php?id=55545&r=needscript Try newer version: https://bugs.php.net/fix.php?id=55545&r=oldversion Not developer issue: https://bugs.php.net/fix.php?id=55545&r=support Expected behavior: https://bugs.php.net/fix.php?id=55545&r=notwrong Not enough info: https://bugs.php.net/fix.php?id=55545&r=notenoughinfo Submitted twice: https://bugs.php.net/fix.php?id=55545&r=submittedtwice register_globals: https://bugs.php.net/fix.php?id=55545&r=globals PHP 4 support discontinued: https://bugs.php.net/fix.php?id=55545&r=php4 Daylight Savings: https://bugs.php.net/fix.php?id=55545&r=dst IIS Stability: https://bugs.php.net/fix.php?id=55545&r=isapi Install GNU Sed: https://bugs.php.net/fix.php?id=55545&r=gnused Floating point limitations: https://bugs.php.net/fix.php?id=55545&r=float No Zend Extensions: https://bugs.php.net/fix.php?id=55545&r=nozend MySQL Configuration Error: https://bugs.php.net/fix.php?id=55545&r=mysqlcfg