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

Edit report at https://bugs.php.net/bug.php?id=67325&edit=1 ID: 67325 Comment by: remi@php.net Reported by: icp at freigre dot com Summary: imagetruecolortopalette: many colors in palette are missing Status: Open Type: Bug Package: GD related PHP Version: 5.5.12 Block user comment: N Private report: N New Comment: I can reproduce, with php 5.4.34 (bundled libgd) and 5.6.3RC1 (system libgd) Result (with or without dither) have 187 different colors, 70 are white. Previous Comments: ------------------------------------------------------------------------ [2014-05-22 11:42:22] icp at freigre dot com 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 this bug report at https://bugs.php.net/bug.php?id=67325&edit=1