php.net |  support |  documentation |  report a bug |  advanced search |  search howto |  statistics |  random bug |  login
Bug #77943 imageantialias($image, false); does not work
Submitted: 2019-04-25 10:56 UTC Modified: 2019-04-30 08:15 UTC
From: andrew dot moyns at sanofi dot com Assigned: cmb (profile)
Status: Closed Package: GD related
PHP Version: 7.3.4 OS: Windows
Private report: No CVE-ID: None
 [2019-04-25 10:56 UTC] andrew dot moyns at sanofi dot com
Description:
------------
PHP 7.3.4 nts 64bit

Unable to turn off antialiasing for an image, resulting in inability to draw lines with thickness > 1

Expected operation is observed in PHP 5.5.38


Test script:
---------------
<?php
    header('Cache-Control: no-cache');
    header('Content-type: image/png');
    
    $width = 400;  $height = 300;
    $im = imagecreatetruecolor($width, $height);
    $white = imagecolorallocate($im, 255, 255, 255);
    $blue = imagecolorallocate($im, 0, 0, 255); 
    
    imageantialias($im, false);
    imagefilledrectangle($im, 0, 0, $width-1, $height-1, $white);
  
    imageline($im, 0, 0, $width, $height, $blue);
    imagesetthickness($im, 3); 
    imageline($im, 10, 0, $width, $height-10, $blue);
  
    imagepng($im);
?>

Expected result:
----------------
PNG image showing two blue lines, not antialiased, one 1 pixel wide, one 3 pixels wide

Actual result:
--------------
PNG image showing two blue lines, antialiased, both 1 pixel wide.

Patches

Add a Patch

Pull Requests

Add a Pull Request

History

AllCommentsChangesGit/SVN commitsRelated reports
 [2019-04-25 12:50 UTC] cmb@php.net
-Status: Open +Status: Verified -Assigned To: +Assigned To: cmb
 [2019-04-25 12:50 UTC] cmb@php.net
Thanks for reporting.  Indeed, this is broken as of PHP 7.2.0[1].
(Not calling imageantialias() would work around the problem for
your code.)

[1] <http://git.php.net/?p=php-src.git;a=commit;h=d0f14a4429e36d8cb70d14067e79fd252eb4ee7a>
 [2019-04-29 14:20 UTC] cmb@php.net
Automatic comment on behalf of cmbecker69@gmx.de
Revision: http://git.php.net/?p=php-src.git;a=commit;h=cd94cf60a2379ccfe4619b1b9384a68b3e7a1205
Log: Fix #77943: imageantialias($image, false); does not work
 [2019-04-29 14:20 UTC] cmb@php.net
-Status: Verified +Status: Closed
 [2019-04-29 15:25 UTC] cmb@php.net
Automatic comment on behalf of cmbecker69@gmx.de
Revision: http://git.php.net/?p=php-src.git;a=commit;h=18a9ae412f00cc1e312c296952fac24f16b4d4de
Log: Fix #77943: imageantialias($image, false); does not work
 [2019-04-30 08:15 UTC] andrew dot moyns at sanofi dot com
That's great, many thanks for the quick response.  Hope to see it in a new release soon!
 
PHP Copyright © 2001-2019 The PHP Group
All rights reserved.
Last updated: Tue Jun 18 04:01:27 2019 UTC