php.net |  support |  documentation |  report a bug |  advanced search |  search howto |  statistics |  random bug |  login

go to bug id or search bugs for

Bug #42201 imagecolortransparent
Submitted: 2007-08-03 12:06 UTC Modified: 2007-08-03 12:47 UTC
From: filipe dot martins at i-senso dot com Assigned: pajoye (profile)
Status: Not a bug Package: GD related
PHP Version: 5.2.4RC1 OS: Windows XP
Private report: No CVE-ID: None
View Developer Edit
 [2007-08-03 12:06 UTC] filipe dot martins at i-senso dot com 
Description:
------------
imagecolortransparent doesn't return the alpha color index though the given PNG is transparent.


Filipe Martins
www.i-senso.com

Reproduce code:
---------------
$img = imagecreatefrompng ('test-imagecreatefrompng.png');
echo imagecolortransparent ($img);


Expected result:
----------------
The PNG is transparent, so the function shouldn't return -1.

Actual result:
--------------
It returns -1.

Patches

Pull Requests

History

AllCommentsChangesGit/SVN commitsRelated reports
 [2007-08-03 12:08 UTC] filipe dot martins at i-senso dot com 
You can get the PNG here:
http://www.i-senso.com/tmp/test-imagecreatefrompng.png

Thanks.
 [2007-08-03 12:47 UTC] pajoye@php.net 
The transparent area is not the transparent color but rgba(255,138,138,0) (here alpha is the level of opacity, 0=transparent, 255=opaque).

not a bug > bogus.
 
PHP Copyright © 2001-2025 The PHP Group
All rights reserved. 		Last updated: Sat Aug 16 16:00:03 2025 UTC