Bug #79158 [Opn->Dup]: PHP-gd imagecreatefrombmp fails on 1-bit BMP

Edit report at https://bugs.php.net/bug.php?id=79158&edit=1 ID: 79158 Updated by: cmb@php.net Reported by: php dot bugreport at tbspace dot de Summary: PHP-gd imagecreatefrombmp fails on 1-bit BMP -Status: Open +Status: Duplicate Type: Bug Package: GD related Operating System: Linux x64 PHP Version: 7.4.1 -Assigned To: +Assigned To: cmb Block user comment: N Private report: N New Comment: This is a duplicate of bug #77391, which is fixed in PHP's bundled libgd as of PHP 7.2.15/7.3.2; it also has been fixed in the development branch of upstream[1], but no new release has been made since then. [1] <https://github.com/libgd/libgd/issues/450> Previous Comments: ------------------------------------------------------------------------ [2020-01-23 08:03:13] php dot bugreport at tbspace dot de Description: ------------ When loading a 1-bit BMP bitmap with gd's imagecreatefrombmp, the resulting image data is corrupted (skewed?). Here's a screenshot of the problem: https://screenshot.tbspace.de/wjstqfduhnk.png And here's a test 1-bit bitmap: https://tbspace.de/content/downloads/042-1rr1.bmp All other tools I tried (ImageMagick, IrfanView, MS Paint) can open this file just fine, so I think this is a PHP-GD issue. Test script: --------------- <?php $im = imagecreatefrombmp("042-1rr1.bmp"); imagepng($im); Expected result: ---------------- Binary data. Write to a .png file with php test.php > test.png and open the .png file in an image viewer. Actual result: -------------- Resulting .png image is skewed/corrupted. (see screenshot in description for an example) ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=79158&edit=1