ID: 40158
Updated by: [EMAIL PROTECTED]
Reported By: henus at mail dot ru
Status: Feedback
Bug Type: GD related
Operating System: Windows XP
PHP Version: 5.2.0
Assigned To: pajoye
New Comment:
Can you provide an image to show what you expect?
I did not check your script but having an image will help to really
understand what you are trying to achieve.
By the way, filters work only with truecolor images, allocate will
never fail.
Previous Comments:
------------------------------------------------------------------------
[2007-01-18 14:26:28] [EMAIL PROTECTED]
>...should be without alpha...
Could you plz elaborate?
A unified diff would explain it much better, btw.
------------------------------------------------------------------------
[2007-01-18 14:23:38] henus at mail dot ru
php-5.2.0\ext\gd\libgd\gd.c
Lines 3682-3685:
new_pxl = gdImageColorAllocateAlpha(src, (int)r, (int)g, (int)b, a);
if (new_pxl == -1) {
new_pxl = gdImageColorClosestAlpha(src, (int)r, (int)g, (int)b, a);
}
....should be without alpha...
------------------------------------------------------------------------
[2007-01-18 11:03:15] henus at mail dot ru
My mistake...
correct 12 line in Reproduce code:
imagefilter($mask, IMG_FILTER_COLORIZE, -255, -255, -255);
------------------------------------------------------------------------
[2007-01-18 10:40:42] henus at mail dot ru
Description:
------------
After using imagefilter (IMG_FILTER_COLORIZE) on transparent png image
the result color of translucent pixels is wrong.
I.e. the edge of non-transparent part of image, which contain
translucent antialiasing area - wrong colored.
Reproduce code:
---------------
<?
$mask=imagecreatefrompng("mask.png"); //
http://fort-ross.ru/henus/gd/mask.png (mask for colorize, contain
translucent)
$imagewidth=imagesx($mask);
$imageheight=imagesy($mask);
$imagemain=imagecreatetruecolor($imagewidth,$imageheight);
imagealphablending($mask, TRUE);
imagealphablending($imagemain, TRUE);
$color=imagecolorallocate($imagemain, 0, 0, 0);
imagefill($imagemain, 0, 0, $color);
imagefilter($mask, IMG_FILTER_COLORIZE, -255, -255, 0);
imagecopy($imagemain, $mask, 0, 0, 0, 0, $imagewidth, $imageheight);
imagepng($imagemain,"result_incorrect.png"); //
http://www.fort-ross.ru/henus/gd/result_incorrect.png
imagedestroy($mask);
imagedestroy($imagemain);
?>
Expected result:
----------------
The result image - absolutely black square
Actual result:
--------------
The result image - black square with gray line (on the edge of mask
image)
------------------------------------------------------------------------
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Edit this bug report at http://bugs.php.net/?id=40158&edit=1
