Bug #67325 [NEW]: imagetruecolortopalette: many colors in palette are missing

From: icp at freigre dot com Operating system: PHP version: 5.5.12 Package: GD related Bug Type: Bug Bug description:imagetruecolortopalette: many colors in palette are missing Description: ------------ This bug has been already posted 2004 here: https://bugs.php.net/bug.php?id=28949 But the bug is still alive in PHP 5.5! I convert a truecolor image with 1000s of different colors into a palette image using imagetruecolortopalette ($image, no, 256) But the palette of the resulting image doesn't contain the 256 most appearing individual colors of the original truecolor image. Many of the palette colors are just white (RGB value: #FF FF FF). For example just 120 colors are individual, the rest of 136 palette entries is white. This results in a worse color reproduction of the palette image than it should be using 256 individual colors. Please fix this bug, since imagetruecolortopalette is very important for creating small-filesized GIF and PNG images. Their filesize is dramatically lower than its truecolor counterpart while retaining satisfying output quality. -- Edit bug report at https://bugs.php.net/bug.php?id=67325&edit=1 -- Try a snapshot (PHP 5.4): https://bugs.php.net/fix.php?id=67325&r=trysnapshot54 Try a snapshot (PHP 5.5): https://bugs.php.net/fix.php?id=67325&r=trysnapshot55 Try a snapshot (trunk): https://bugs.php.net/fix.php?id=67325&r=trysnapshottrunk Fixed in SVN: https://bugs.php.net/fix.php?id=67325&r=fixed Fixed in release: https://bugs.php.net/fix.php?id=67325&r=alreadyfixed Need backtrace: https://bugs.php.net/fix.php?id=67325&r=needtrace Need Reproduce Script: https://bugs.php.net/fix.php?id=67325&r=needscript Try newer version: https://bugs.php.net/fix.php?id=67325&r=oldversion Not developer issue: https://bugs.php.net/fix.php?id=67325&r=support Expected behavior: https://bugs.php.net/fix.php?id=67325&r=notwrong Not enough info: https://bugs.php.net/fix.php?id=67325&r=notenoughinfo Submitted twice: https://bugs.php.net/fix.php?id=67325&r=submittedtwice register_globals: https://bugs.php.net/fix.php?id=67325&r=globals PHP 4 support discontinued: https://bugs.php.net/fix.php?id=67325&r=php4 Daylight Savings: https://bugs.php.net/fix.php?id=67325&r=dst IIS Stability: https://bugs.php.net/fix.php?id=67325&r=isapi Install GNU Sed: https://bugs.php.net/fix.php?id=67325&r=gnused Floating point limitations: https://bugs.php.net/fix.php?id=67325&r=float No Zend Extensions: https://bugs.php.net/fix.php?id=67325&r=nozend MySQL Configuration Error: https://bugs.php.net/fix.php?id=67325&r=mysqlcfg