#50971 [NEW]: imagettftext/imagettfbbox return wrong coordinates if angle != 0

From: Date: Tue, 09 Feb 2010 06:39:42 +0000
Subject: #50971 [NEW]: imagettftext/imagettfbbox return wrong coordinates if angle != 0
Groups: php.bugs 
Request: Send a blank email to php-bugs+get-147352@lists.php.net to get a copy of this message 
From:             sks76543210 at gmail dot com
Operating system: CentOS 5
PHP version:      5.3SVN-2010-02-09 (snap)
PHP Bug Type:     GD related
Bug description:  imagettftext/imagettfbbox return wrong coordinates if angle != 0

Description:
------------
imagettftext() and imagettfbbox() both return wrong bounding box if the
angle is not set to 0. This sounds similar to a bug closed last year at
http://bugs.php.net/bug.php?id=43073

See http://www.yessum.org/gdbug2/ for font and samples.
This bug appears
to be in 5.1.6, and has since gotten worse in the latest svn. 

Also, in 5.3.3-dev, the text doesn't seem to even be on the same baseline
on many of the angles.

Reproduce code:
---------------
<?php
    $font = './cour.ttf'; // Courier New
    
    $im = imagecreatetruecolor(600, 600);
    
    imagefill($im, 0, 0, imagecolorallocate($im, 224, 224, 224));
    $black = imagecolorallocate($im, 0, 0, 0);
    $red = imagecolorallocate($im, 255, 0, 0);
    
    $angle = 0;
    do {
        $bbox = imagettftext($im, 16, $angle, 299, 299, $black, $font,
'The quick brown fox');
        imagepolygon($im, $bbox, 4, $red);
        $angle += 45;
    } while ($angle < 360);
    
    header('content-type: image/png');
    imagepng($im);

Expected result:
----------------
The bounding box should be a bounding box

Actual result:
--------------
The string is not contained in the bounding box.

-- 
Edit bug report at http://bugs.php.net/?id=50971&edit=1
-- 
Try a snapshot (PHP 5.2):            http://bugs.php.net/fix.php?id=50971&r=trysnapshot52
Try a snapshot (PHP 5.3):            http://bugs.php.net/fix.php?id=50971&r=trysnapshot53
Try a snapshot (PHP 6.0):            http://bugs.php.net/fix.php?id=50971&r=trysnapshot60
Fixed in SVN:                        http://bugs.php.net/fix.php?id=50971&r=fixed
Fixed in SVN and need be documented: http://bugs.php.net/fix.php?id=50971&r=needdocs
Fixed in release:                    http://bugs.php.net/fix.php?id=50971&r=alreadyfixed
Need backtrace:                      http://bugs.php.net/fix.php?id=50971&r=needtrace
Need Reproduce Script:               http://bugs.php.net/fix.php?id=50971&r=needscript
Try newer version:                   http://bugs.php.net/fix.php?id=50971&r=oldversion
Not developer issue:                 http://bugs.php.net/fix.php?id=50971&r=support
Expected behavior:                   http://bugs.php.net/fix.php?id=50971&r=notwrong
Not enough info:                     http://bugs.php.net/fix.php?id=50971&r=notenoughinfo
Submitted twice:                     http://bugs.php.net/fix.php?id=50971&r=submittedtwice
register_globals:                    http://bugs.php.net/fix.php?id=50971&r=globals
PHP 4 support discontinued:          http://bugs.php.net/fix.php?id=50971&r=php4
Daylight Savings:                    http://bugs.php.net/fix.php?id=50971&r=dst
IIS Stability:                       http://bugs.php.net/fix.php?id=50971&r=isapi
Install GNU Sed:                     http://bugs.php.net/fix.php?id=50971&r=gnused
Floating point limitations:          http://bugs.php.net/fix.php?id=50971&r=float
No Zend Extensions:                  http://bugs.php.net/fix.php?id=50971&r=nozend
MySQL Configuration Error:           http://bugs.php.net/fix.php?id=50971&r=mysqlcfg

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