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Bug #22404 imageCopyMergeGray does not work
Submitted: 2003-02-24 16:41 UTC Modified: 2003-02-25 20:07 UTC
From: arebroff at rogers dot com Assigned:
Status: Not a bug Package: GD related
PHP Version: 4.3.1 OS: Windows XP
Private report: No CVE-ID: None
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From: arebroff at rogers dot com
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 [2003-02-24 16:41 UTC] arebroff at rogers dot com 
This code outputs picture but it is not in grey palette and it does not depend on $transition.
Why?
How do  I need transform it to get image in black-and-white?
-----------------
$old=@imagecreatefromjpeg("userspictures/2.jpg");
$transition=0;
imageCopyMergeGray($old, $old, 0, 0, 100, 200, 300, 400, $transition);
Header("Content-type: image/jpeg"); 
Imagejpeg($old, '', 80);
-----------------

Thanks for any help.

Alexei

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 [2003-02-25 17:55 UTC] iliaa@php.net 
Thank you for taking the time to write to us, but this is not
a bug. Please double-check the documentation available at
http://www.php.net/manual/ and the instructions on how to report
a bug at http://bugs.php.net/how-to-report.php

The code does not work as expected due to the fact that both source & destination images are the same. This function will not work unless you are working with 2 seperate images (different content). When that is the case the function appears to work correctly.
 [2003-02-25 20:07 UTC] arebroff at rogers dot com 
I changed my code but new one does not work at all!
I have to mention that imageCopyMerge vs imageCopyMergeGray works good in same function.
-----------------------------
$old=imagecreatefromjpeg("userspictures/2.jpg");
$new=imagecreatefromjpeg("userspictures/3.jpg");

imageCopyMergeGray($new, $old, 0, 0, 50, 50, 50, 50, 100);

Header("Content-type: image/jpeg"); 
Imagejpeg($new);
-----------------------------
 
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