Edit report at http://bugs.php.net/bug.php?id=49815&edit=1
ID: 49815
Comment by: php at zunderer dot de
Reported by: christian dot roy at orange dot fr
Summary: Problem with imagettfbbox
Status: No Feedback
Type: Bug
Package: GD related
Operating System: Linux
PHP Version: 5.2.11
Assigned To: tabe
Block user comment: N
New Comment:
It seems like this Bug is still present, both of the Testscripts
provided by rasmus here and by ch+php in Bug #49600 produce
correct results in PHP 5.0.5 and 5.2.5 but wrong results
(x-coord of boundingbox shifted to left or right depending on
Font and letter) on PHP 5.2.11 and 5.3.3
Previous Comments:
------------------------------------------------------------------------
[2010-01-22 01:00:00] 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".
------------------------------------------------------------------------
[2010-01-14 05:00:49] t...@php.net
s/#45600/#49600/
------------------------------------------------------------------------
[2010-01-14 04:59:07] t...@php.net
rasmus, your observation is essential to understand this bug.
fix for bug#45600 also seems to work well.
With PHP_5_2 or trunk:
bbox returned rectangle for a : -1 * 2 * 38 * 2 * 38 * -42 *
-1 * -42
bbox returned rectangle for k : -1 * -1 * 42 * -1 * 42 * -62
* -1 * -62
bbox returned rectangle for j : -1 * 17 * 23 * 17 * 23 * -57
* -1 * -57
------------------------------------------------------------------------
[2009-12-23 17:49:24] christian dot roy at orange dot fr
Hi,
Did you progress on this issue whicj sticks me to PHP 4.
Thanks for your answer.
------------------------------------------------------------------------
[2009-12-16 21:56:23] rasmus at mindplay dot dk
To help you debug this issue, I created the following test-script:
<?php
define('SAMPLE', @$_SERVER['QUERY_STRING'] ? $_SERVER['QUERY_STRING'] :
'abc');
define('SAMPLE_TTF', dirname(__FILE__).'/georgiai.ttf');
define('SAMPLE_SIZE', 100);
define('SAMPLE_PAD', 50);
$m = imagettfbbox(SAMPLE_SIZE, 0, SAMPLE_TTF, SAMPLE);
$width = $m[4]-$m[6] + 2*SAMPLE_PAD;
$height = $m[1]-$m[7] + 2*SAMPLE_PAD;
$baseline = abs($m[7]);
$img = imagecreatetruecolor($width,$height);
$red = imagecolorallocate($img,255,0,0);
$white = imagecolorallocate($img,255,255,255);
imagettftext(
$img,
SAMPLE_SIZE, # size
0, # angle
SAMPLE_PAD, # x
SAMPLE_PAD+$baseline, # y
$white,
SAMPLE_TTF,
SAMPLE
);
imagerectangle(
$img,
$m[6]+SAMPLE_PAD, $m[7]+SAMPLE_PAD+$baseline, # upper left x,y
$m[2]+SAMPLE_PAD, $m[3]+SAMPLE_PAD+$baseline, # lower right x,y
$red
);
header('Content-type: image/png');
imagepng($img);
?>
You will need to adjust the SAMPLE_TTF path to point to a valid truetype
file - the one I'm using is Windows standard Georgia Italics.
The output should be a white sample of text with a red border, and the
border should grace the text, not overlap it.
For reference, here's what it looks like on Linux (GOOD):
http://mindplay.dk/temp/metrics/imagettf-good.png
And here's what it looks like on Windows (BAD):
http://mindplay.dk/temp/metrics/imagettf-bad.png
I just tried the latest XAMPP build (1.7.2 beta 2) for Windows, and the
bug is still present.
If you run the script from a browser, you can add your own sample text
by adding a query string, e.g.:
http://localhost/sample.php?abcdefg
Note that using a larger font-size (SAMPLE_SIZE) seems to increase the
error. It seems that all the returned coordinates are off by a
percentage, not by a fixed number of pixels.
I hope this helps solve the problem...
------------------------------------------------------------------------
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