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Bug #30243 ...topalette creates 2 colors from 1 color image
Submitted: 2004-09-26 13:37 UTC Modified: 2004-09-26 14:38 UTC
From: pmpp at sapo dot pt Assigned:
Status: Not a bug Package: *Graphics related
PHP Version: 4.3.9RC3 OS: Windows XP
Private report: No CVE-ID: None
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 [2004-09-26 13:37 UTC] pmpp at sapo dot pt
Description:
------------
I create a truecolor image, fill it with 1 color, then I make that color transparent, but when I convert the image to palette, I get 1 pixel of a slightest different color of the first one, shifted 1pixel to the right of every pixel near a transparent pixel.

[GD Version] => bundled (2.0.28 compatible)

Reproduce code:
---------------
<?php
$image = imagecreatetruecolor(100,100) or die("");
$color = imagecolorallocate($image, 255, 229, 178);
imagefill($image, 0, 0, $color);
imagecolortransparent( $image, $color);
imagetruecolortopalette ( $image, 0, 255);
imagepng($image);
?>

Expected result:
----------------
I expect to have all the image transparent.

Actual result:
--------------
With a more complex image, it's as I had moved a selection of the NON transparent image, full of a slightest different color of the one I made transparent, moved 1pixel to the right in the background.

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 [2004-09-26 14:38 UTC] johannes@php.net
Please do not submit the same bug more than once. An existing
bug report already describes this very problem. Even if you feel
that your issue is somewhat different, the resolution is likely
to be the same. 

Thank you for your interest in PHP.

See #30242 
 
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