From:
Operating system: Windows XP
PHP version: 5.3.2
Package: GD related
Bug Type: Bug
Bug description:imageellipse() draws incorrectly
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.
--
Edit bug report at http://bugs.php.net/bug.php?id=51593&edit=1
--
Try a snapshot (PHP 5.2):
http://bugs.php.net/fix.php?id=51593&r=trysnapshot52
Try a snapshot (PHP 5.3):
http://bugs.php.net/fix.php?id=51593&r=trysnapshot53
Try a snapshot (PHP 6.0):
http://bugs.php.net/fix.php?id=51593&r=trysnapshot60
Fixed in SVN:
http://bugs.php.net/fix.php?id=51593&r=fixed
Fixed in SVN and need be documented:
http://bugs.php.net/fix.php?id=51593&r=needdocs
Fixed in release:
http://bugs.php.net/fix.php?id=51593&r=alreadyfixed
Need backtrace:
http://bugs.php.net/fix.php?id=51593&r=needtrace
Need Reproduce Script:
http://bugs.php.net/fix.php?id=51593&r=needscript
Try newer version:
http://bugs.php.net/fix.php?id=51593&r=oldversion
Not developer issue:
http://bugs.php.net/fix.php?id=51593&r=support
Expected behavior:
http://bugs.php.net/fix.php?id=51593&r=notwrong
Not enough info:
http://bugs.php.net/fix.php?id=51593&r=notenoughinfo
Submitted twice:
http://bugs.php.net/fix.php?id=51593&r=submittedtwice
register_globals:
http://bugs.php.net/fix.php?id=51593&r=globals
PHP 4 support discontinued: http://bugs.php.net/fix.php?id=51593&r=php4
Daylight Savings: http://bugs.php.net/fix.php?id=51593&r=dst
IIS Stability:
http://bugs.php.net/fix.php?id=51593&r=isapi
Install GNU Sed:
http://bugs.php.net/fix.php?id=51593&r=gnused
Floating point limitations:
http://bugs.php.net/fix.php?id=51593&r=float
No Zend Extensions:
http://bugs.php.net/fix.php?id=51593&r=nozend
MySQL Configuration Error:
http://bugs.php.net/fix.php?id=51593&r=mysqlcfg
