diff options
| author | Christoph M. Becker <cmbecker69@gmx.de> | 2020-05-22 09:22:38 +0200 |
|---|---|---|
| committer | Christoph M. Becker <cmbecker69@gmx.de> | 2020-05-22 09:22:38 +0200 |
| commit | 7f51f435097df83af3d39bd088cb17f15ae970a0 (patch) | |
| tree | 35bea65e72bb5571ccc94ae8534ca18ffd2f9cf1 | |
| parent | bb1a68b40c90612d21e2a416e6658dc044d19f30 (diff) | |
| parent | da801ba5e3553f4c217d2528b36a5977ee9a90ed (diff) | |
| download | php-git-7f51f435097df83af3d39bd088cb17f15ae970a0.tar.gz | |
Merge branch 'PHP-7.4'
* PHP-7.4:
Fix #79615: Wrong GIF header written in GD GIFEncode
| -rw-r--r-- | ext/gd/libgd/gd_gif_out.c | 2 | ||||
| -rw-r--r-- | ext/gd/tests/bug79615.phpt | 20 |
2 files changed, 21 insertions, 1 deletions
diff --git a/ext/gd/libgd/gd_gif_out.c b/ext/gd/libgd/gd_gif_out.c index 912769128b..e721992b48 100644 --- a/ext/gd/libgd/gd_gif_out.c +++ b/ext/gd/libgd/gd_gif_out.c @@ -333,7 +333,7 @@ GIFEncode(gdIOCtxPtr fp, int GWidth, int GHeight, int GInterlace, int Background /* * OR in the resolution */ - B |= (Resolution - 1) << 5; + B |= (Resolution - 1) << 4; /* * OR in the Bits per Pixel diff --git a/ext/gd/tests/bug79615.phpt b/ext/gd/tests/bug79615.phpt new file mode 100644 index 0000000000..b7cf9175c5 --- /dev/null +++ b/ext/gd/tests/bug79615.phpt @@ -0,0 +1,20 @@ +--TEST-- +Bug #79615 (Wrong GIF header written in GD GIFEncode) +--SKIPIF-- +<?php +if (!extension_loaded('gd')) die('skip gd extension not available'); +?> +--FILE-- +<?php +$im = imagecreate(3, 3); // 3x3, 9 colors, 4 bits per pixel +for ($x = 0; $x < 3; $x++) { + for ($y = 0; $y < 3; $y++) { + imagesetpixel($im, $x, $y, imagecolorallocate($im, $x, $y, 0)); + } +} +ob_start(); +imagegif($im); +echo decbin(ord(ob_get_clean()[0xA])); +?> +--EXPECT-- +10110011 |