ID: 34357
User updated by: zakay at danial dot se
Reported By: zakay at danial dot se
-Status: Feedback
+Status: Open
Bug Type: GD related
Operating System: Gentoo Linux, OS X, Windows XP
PHP Version: 5.0.4
Assigned To: pajoye
New Comment:
Ok, I made a picture in photoshop, a png with white lines
antialiased.. and a brush thats blury.
Please notice that it doesn't matter what the background
color is. .I use the same picture on three different
background colors in the html.
http://www.zacay.se/image/test2/
Can you make lines in PHP-GD that works the same way?
Its seems no, cause actually you haven't thought about this
yet.
I don't want it to know what background color I use in my
HTML, I want it to think that the image I work on is
transparent and the antialiased lines work on whatever
background I choose to.
Please see my second link: http://www.zacay.se/image/test2/
Previous Comments:
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[2005-09-03 14:35:09] pajoye@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
Please read my answer and how works antiaalising in general.
You have a _transparent color, and this color is white. Your draw a
white line, what do you expect? Or should I automagically know the
color used when you display the images? (in your case the grey of your
page).
Or what do you consider as correct blending method in this case?
--Pierre
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[2005-09-03 14:21:43] zakay at danial dot se
I don't want it to blend the color, but imageline with
antialias enabled thinks that the background is none-
transparent and thus the result.. no smooth line.. but a
thicker line where instead it would be antialiased.
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[2005-09-03 14:14:12] zakay at danial dot se
Have you even seen the link I posted?
Really do check the link and then tell me its not a bug.
And please this is a very easy code, give me the solution
then?
I opened the source code for that part, and I say the BLEND
function, and it doesn't do alpha blending correctly.
See the link, please.
------------------------------------------------------------------------
[2005-09-03 12:59:49] pajoye@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
Your background is white, whether it is full transparent or not is not
really relevant.
White on white does not use any blending method.
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[2005-09-03 11:50:25] zakay at danial dot se
Description:
------------
When drawing antialias lines on semi or fully transparent
pictures the alpha value on the bg isn't accounted for.
And the color blending isn't working correctly.
Reproduce code:
---------------
http://www.zacay.se/image/
Expected result:
----------------
White antialias lines on fully transparent png created by GD.
Actual result:
--------------
White lines that have the antialias colored as fully white or
a bit black.
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Edit this bug report at http://bugs.php.net/?id=34357&edit=1