ID: 26144
Updated by: iliaa@php.net
Reported By: sprice at wisc dot edu
-Status: Open
+Status: Closed
Bug Type: GD related
Operating System: Mac 10.3
PHP Version: 4.3.4
New Comment:
This bug has been fixed in CVS.
In case this was a PHP problem, 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/.
In case this was a documentation problem, the fix will show up soon at
http://www.php.net/manual/.
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Thank you for the report, and for helping us make PHP better.
Previous Comments:
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[2003-11-05 17:52:49] sprice at wisc dot edu
Description:
------------
ImageRotate() is messing with my alpha channel. Examples
to follow.
Reproduce code:
---------------
<?php
header( 'Content-type: image/png' );
$img = ImageCreate(100, 60);
$white = ImageColorResolve($img, 255, 255, 255);
$almost_clear = ImageColorResolveAlpha($img, 1, 1, 250, 63);
ImageFilledRectangle($img, 0, 0, 50, 30, $white);
ImageFilledRectangle($img, 10, 10, 100, 60, $almost_clear);
ImagePNG($img); // This works
//ImagePNG(ImageRotate($img, 90, $almost_clear)); // This is all black
?>
Expected result:
----------------
When you run this as is, you get a semitransparent blue
rectangle.
Actual result:
--------------
If you replace the commented out ImagePNG()
with the commented one, the alpha channel inverts
itself. As you increase the transparency of
$almost_clear, it becomes black (in contrast to the non-
ImageRotate()
line).
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Edit this bug report at http://bugs.php.net/?id=26144&edit=1