Bug #51593 [Com]: imageellipse() draws incorrectly
Edit report at https://bugs.php.net/bug.php?id=51593&edit=1
ID: 51593
Comment by: luke at woollysheep dot net
Reported by: ellipsebugs at yahoo dot com
Summary: imageellipse() draws incorrectly
Status: Open
Type: Bug
Package: GD related
Operating System: Windows XP
PHP Version: 5.3.2
Block user comment: N
Private report: N
New Comment:
same problem into linux slackware but the size must be > than 2200
PHP version: 5.6.4
GD version: bundled (2.1.0 compatible)
Previous Comments:
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[2012-06-07 11:40:55] merlijn at bntnederland dot nl
Running into the same problem on a freeBSD Server/5.3.10/gd2.0.34.
Stupid thing is that on my developmentserver, which has the same software specs,
the problem doesn't exist. When I moved my script to the production server it
popped up.
As far I can tell the only difference is that my production server runs an 64bit
OS and my development server an 32bit version of freeBSD (both run 8.2).
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[2011-02-24 20:03:34] blyon at blyon dot com
I'm having the same problem with large ellipses on FreeBSD, I am trying to do
ellipses > 1000 pixels and they look like bumpy squares:
PHP 5.2.6 with Suhosin-Patch 0.9.6.2 (cli) (built: Oct 21 2008 18:22:59)
Copyright (c) 1997-2008 The PHP Group
Zend Engine v2.2.0, Copyright (c) 1998-2008 Zend Technologies
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[2010-04-18 23:17:51] ellipsebugs at yahoo dot com
Description:
------------
On a system of Window XP, PHP/5.3.0 and GD 2.0.34 the imageellipse() function fails to draw a circle
properly when dealing with large dimensions.
Calling the function for a circle with radius over 1032 pixels (an ellipse with equal width and
height over 2064 pixels) creates a deformed circle with bumps in four directions. Increasing the
dimensions makes things worse.
On a system of Linux, PHP/5.2.13 and GD 2.0.34 the issue does not appear.
Test script:
---------------
<?php
header ("Content-type: image/png");
$im = imagecreatetruecolor(2200, 2200) or die("Cannot Initialize new GD image stream");
imagefill($im, 0, 0, imagecolorallocate($im, 255, 255, 255));
imageellipse($im, 1100, 1100, 2064, 2064, imagecolorallocate($im, 0, 0, 255));
imagepng($im);
imagedestroy($im);
?>
Expected result:
----------------
A relatively smooth circle is drawn.
Actual result:
--------------
The resulting circle has irregular bumps in it.
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Edit this bug report at https://bugs.php.net/bug.php?id=51593&edit=1
Thread (6 messages)