#39366 [Opn->Csd]: imagerotate preserve alpha channel only if degree less then 45
| From: | pajoye@php.net | Date: | Sat, 04 Nov 2006 03:24:42 +0000 |
| Subject: | #39366 [Opn->Csd]: imagerotate preserve alpha channel only if degree less then 45 | ||
| References: | 1 | Groups: | php.bugs |
| Request: | Send a blank email to php-bugs+get-104364@lists.php.net to get a copy of this message | ||
ID: 39366
Updated by: pajoye@php.net
Reported By: ciakana at gmail dot com
-Status: Open
+Status: Closed
Bug Type: GD related
Operating System: Windows XP
PHP Version: 5.2.0
-Assigned To:
+Assigned To: pajoye
New Comment:
This bug has been fixed in CVS.
Snapshots of the sources are packaged every three hours; this change
will be in the next snapshot. You can grab the snapshot at
http://snaps.php.net/.
Thank you for the report, and for helping us make PHP better.
Previous Comments:
------------------------------------------------------------------------
[2006-11-03 22:18:02] ciakana at gmail dot com
Description:
------------
If I run the allegated script, where shade.png is a png image with a
transparent background (full alpha channel), all works if the degrees
are less then 45. If I set the degrees to 300, for example, the
background become black.
Reproduce code:
---------------
<?php
$filename="shade.png";
$degrees =300;
header('Content-type: image/png');
$source = imagecreatefrompng($filename);
$rotate = imagerotate($source, $degrees, -1);
imagealphablending($rotate, true);
imagesavealpha($rotate, true);
imagepng($rotate);
?>
Expected result:
----------------
A rotated copy of the original image with the alpha channel preserved
Actual result:
--------------
An image with a black bakground
------------------------------------------------------------------------
[2006-11-03 22:16:43] ciakana at gmail dot com
Description:
------------
If I run the allegated script, where shade.png is a png image with a
transparent background (full alpha channel), all works if the degrees
are less then 45. If I set the degrees to 300, for example, the
background become black.
Reproduce code:
---------------
<?php
$filename="shade.png";
$degrees =300;
header('Content-type: image/png');
$source = imagecreatefrompng($filename);
$rotate = imagerotate($source, $degrees, -1);
imagealphablending($rotate, true);
imagesavealpha($rotate, true);
imagepng($rotate);
?>
Expected result:
----------------
An image with a black bakground
Actual result:
--------------
A rotated copy of the original image with the alpha channel preserved
------------------------------------------------------------------------
--
Edit this bug report at http://bugs.php.net/?id=39366&edit=1