Bug #70102 [NEW]: imagecreatefromwebm() shifts colors
From: cmb
Operating system: *
PHP version: 5.6.11
Package: GD related
Bug Type: Bug
Bug description:imagecreatefromwebm() shifts colors
Description:
------------
When reading images with imagecreatefromwebp() all colors are
shifted.
This issue has already been reported upstream against libgd:
<https://github.com/libgd/libgd/issues/83>.
Test script:
---------------
<?php
$im = imagecreatetruecolor(8, 8);
$white = imagecolorallocate($im, 0xff, 0xaa, 0x55);
echo sprintf("%08x\n", $white);
imagefilledrectangle($im, 0, 0, 74, 74, $white);
imagewebp($im, 'test.webp');
imagedestroy($im);
$im = imagecreatefromwebp('test.webp');
echo sprintf("%08x\n", imagecolorat($im, 4, 4));
imagepng($im, 'test.png');
?>
Expected result:
----------------
00ffaa55
00ffaa55
Actual result:
--------------
00ffaa55
ffab5500
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Edit bug report at https://bugs.php.net/bug.php?id=70102&edit=1
--
Try a snapshot (PHP 5.4): https://bugs.php.net/fix.php?id=70102&r=trysnapshot54
Try a snapshot (PHP 5.5): https://bugs.php.net/fix.php?id=70102&r=trysnapshot55
Try a snapshot (trunk): https://bugs.php.net/fix.php?id=70102&r=trysnapshottrunk
Fixed in SVN: https://bugs.php.net/fix.php?id=70102&r=fixed
Fixed in release: https://bugs.php.net/fix.php?id=70102&r=alreadyfixed
Need backtrace: https://bugs.php.net/fix.php?id=70102&r=needtrace
Need Reproduce Script: https://bugs.php.net/fix.php?id=70102&r=needscript
Try newer version: https://bugs.php.net/fix.php?id=70102&r=oldversion
Not developer issue: https://bugs.php.net/fix.php?id=70102&r=support
Expected behavior: https://bugs.php.net/fix.php?id=70102&r=notwrong
Not enough info: https://bugs.php.net/fix.php?id=70102&r=notenoughinfo
Submitted twice: https://bugs.php.net/fix.php?id=70102&r=submittedtwice
register_globals: https://bugs.php.net/fix.php?id=70102&r=globals
PHP 4 support discontinued: https://bugs.php.net/fix.php?id=70102&r=php4
Daylight Savings: https://bugs.php.net/fix.php?id=70102&r=dst
IIS Stability: https://bugs.php.net/fix.php?id=70102&r=isapi
Install GNU Sed: https://bugs.php.net/fix.php?id=70102&r=gnused
Floating point limitations: https://bugs.php.net/fix.php?id=70102&r=float
No Zend Extensions: https://bugs.php.net/fix.php?id=70102&r=nozend
MySQL Configuration Error: https://bugs.php.net/fix.php?id=70102&r=mysqlcfg
Thread (3 messages)
- cmb@php.net