Bug #53580 [NEW]: During resize gdImageCopyResampled cause colors change

From: Date: Mon, 20 Dec 2010 08:45:26 +0000
Subject: Bug #53580 [NEW]: During resize gdImageCopyResampled cause colors change
Groups: php.bugs 
Request: Send a blank email to php-bugs+get-157114@lists.php.net to get a copy of this message 
From:             
Operating system: Windows, Ubuntu, CentOS, any?
PHP version:      5.2.16
Package:          GD related
Bug Type:         Bug
Bug description:During resize gdImageCopyResampled cause colors change 

Description:
------------
Reproduce:
To test resize image containing solid white background. After resize pixels
with 
color different from #FFFFFF will appear.
Probable cause:
gdImageSetPixel parameters (red, green, blue, alpha) are casted to int in 
gdImageCopyResampled which cause them to floor so 254.9999999 became 254
instead 
of 255.
Issues seem to be related:
http://bugs.php.net/bug.php?id=30591
http://bugs.php.net/bug.php?id=41820


-- 
Edit bug report at http://bugs.php.net/bug.php?id=53580&edit=1
-- 
Try a snapshot (PHP 5.2):            http://bugs.php.net/fix.php?id=53580&r=trysnapshot52
Try a snapshot (PHP 5.3):            http://bugs.php.net/fix.php?id=53580&r=trysnapshot53
Try a snapshot (trunk):              http://bugs.php.net/fix.php?id=53580&r=trysnapshottrunk
Fixed in SVN:                        http://bugs.php.net/fix.php?id=53580&r=fixed
Fixed in SVN and need be documented: http://bugs.php.net/fix.php?id=53580&r=needdocs
Fixed in release:                    http://bugs.php.net/fix.php?id=53580&r=alreadyfixed
Need backtrace:                      http://bugs.php.net/fix.php?id=53580&r=needtrace
Need Reproduce Script:               http://bugs.php.net/fix.php?id=53580&r=needscript
Try newer version:                   http://bugs.php.net/fix.php?id=53580&r=oldversion
Not developer issue:                 http://bugs.php.net/fix.php?id=53580&r=support
Expected behavior:                   http://bugs.php.net/fix.php?id=53580&r=notwrong
Not enough info:                     http://bugs.php.net/fix.php?id=53580&r=notenoughinfo
Submitted twice:                     http://bugs.php.net/fix.php?id=53580&r=submittedtwice
register_globals:                    http://bugs.php.net/fix.php?id=53580&r=globals
PHP 4 support discontinued:          http://bugs.php.net/fix.php?id=53580&r=php4
Daylight Savings:                    http://bugs.php.net/fix.php?id=53580&r=dst
IIS Stability:                       http://bugs.php.net/fix.php?id=53580&r=isapi
Install GNU Sed:                     http://bugs.php.net/fix.php?id=53580&r=gnused
Floating point limitations:          http://bugs.php.net/fix.php?id=53580&r=float
No Zend Extensions:                  http://bugs.php.net/fix.php?id=53580&r=nozend
MySQL Configuration Error:           http://bugs.php.net/fix.php?id=53580&r=mysqlcfg

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