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Bug #39071 imagettftext cuts off first pixel
Submitted: 2006-10-06 21:43 UTC Modified: 2006-10-15 01:00 UTC
From: joel at seligstein dot com Assigned: pajoye (profile)
Status: No Feedback Package: GD related
PHP Version: 5.1.6 OS: Irrelevant
Private report: No CVE-ID: None
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 [2006-10-06 21:43 UTC] joel at seligstein dot com
Description:
------------
Using text anywhere on an image using a local font (copy of Verdana.TTF), imagettffont cuts off the first pixel.  This is easily evident in the capital letter I.

gd_info():
array(12) {
  ["GD Version"]=>
  string(27) "bundled (2.0.28 compatible)"
  ["FreeType Support"]=>
  bool(true)
  ["FreeType Linkage"]=>
  string(13) "with freetype"
  ["T1Lib Support"]=>
  bool(false)
  ["GIF Read Support"]=>
  bool(true)
  ["GIF Create Support"]=>
  bool(true)
  ["JPG Support"]=>
  bool(true)
  ["PNG Support"]=>
  bool(true)
  ["WBMP Support"]=>
  bool(true)
  ["XPM Support"]=>
  bool(false)
  ["XBM Support"]=>
  bool(true)
  ["JIS-mapped Japanese Font Support"]=>
  bool(false)
}


Reproduce code:
---------------
header( "Content-type: image/png" );
$i = imagecreate(100,100);
$white = imagecolorallocate($i,255,255,255);
$black = imagecolorallocate($i,0,0,0);
imagefill( $i, 0,0,$white);
imagettftext( $i, 10, 0, 30, 30, $black, "/path/to/Verdana.TTF", "I am testing" );
imagepng($i);

And you will see the letter I has the first pixel cut off.



Expected result:
----------------
I'd expect full letters, not missing the first pixel.


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 [2006-10-06 22:01 UTC] joel at seligstein dot com
After other tests, this appears just to be the capital I letter.
 [2006-10-06 22:05 UTC] joel at seligstein dot com
I'm going to keep changing my mind, here.  The J obviously is missing a pixel as well.  It appears some or all of the letters are mixing a pixel.
 [2006-10-07 06:13 UTC] pajoye@php.net
Please provide a link to the TTF file. Which freetype version do you use?
 [2006-10-15 01:00 UTC] php-bugs at lists dot php dot net
No feedback was provided for this bug for over a week, so it is
being suspended automatically. If you are able to provide the
information that was originally requested, please do so and change
the status of the bug back to "Open".
 
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