ID: 21560
Updated by: iliaa@php.net
Reported By: ljpersson@hotmail.com
-Status: Open
+Status: Verified
Bug Type: GD related
Operating System: SusE 8.0
-PHP Version: 4.3.0
+PHP Version: 4.3.1-dev
New Comment:
Verified with latest CVS, this however appears to be an issue with the
GD library itself since the problem is not particular to the bundled
GD.
Previous Comments:
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[2003-02-13 11:45:01] sniper@php.net
Please use the 'Edit submission' link when you reply to
your _own_ report, otherwise the status remains at 'feedback'..and
eventually gets automatically suspended.
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[2003-02-13 05:26:09] ljpersson@hotmail.com
Below is a simple test script that illustates the problem. You might
need to change the path for the fonts to suit your setup.
The script strokes a text and then draws the bounding box around the
text. For angle = 0 the bounding box is correct but for any other angle
it is off proportional to the angle.
(With GD 2.01 this is correct but for higher versions the problem
exists)
/Johan
<?php
DEFINE('TTF_DIR','/usr/X11R6/lib/X11/fonts/truetype/');
$w=400; $h=300;
$img = @imagecreatetruecolor($w,$h);
$black = imagecolorallocate ($img, 0, 0, 0);
$white = imagecolorallocate ($img, 255, 255, 255);
$red = imagecolorallocate ($img, 255, 0, 0);
imagefilledrectangle($img,0,0,$w,$h,$white);
$font = TTF_DIR.'arial.ttf';
$font_size = 14;
$txt = 'Some dummy text';
$x = 75; $y=250;
// For angle == 0 the TTF box is correct
$angle = 90;
imagettftext($img,$font_size,$angle,$x,$y,$black,$font,$txt);
$bbox = imagettfbbox(14,$angle,$font,$txt);
// Drwa the bounding box
imageline($img,$x+$bbox[0],$y+$bbox[1],$x+$bbox[2],$y+$bbox[3],$red);
imageline($img,$x+$bbox[0],$y+$bbox[1],$x+$bbox[6],$y+$bbox[7],$red);
imageline($img,$x+$bbox[6],$y+$bbox[7],$x+$bbox[4],$y+$bbox[5],$red);
imageline($img,$x+$bbox[4],$y+$bbox[5],$x+$bbox[2],$y+$bbox[3],$red);
header("Content-type: image/png");
imagepng($img);
/*
print_r($bbox);
On SuSE 8.0 this gives (for angle=90):
PHP 4.2.3 With GD 2.01 gives [CORRECT]:
Array ( [0] => 3 [1] => -1 [2] => 3 [3] => -154
[4] => -16 [5] => -154 [6] => -16 [7] => -2 )
PHP 4.2.3 With GD 2.08 gives [WRONG]:
Array ( [0] => -1 [1] => 13 [2] => -1 [3] => -153
[4] => -17 [5] => -153 [6] => -17 [7] => 13 )
PHP 4.3.0 With built-in GD gives [WRONG]:
Array ( [0] => -1 [1] => 13 [2] => -1 [3] => -153
[4] => -17 [5] => -153 [6] => -17 [7] => 13 )
PHP 4.3.1-dev (2002-02-07) [WRONG]
Array ( [0] => -1 [1] => 13 [2] => -1 [3] => -153
[4] => -17 [5] => -153 [6] => -17 [7] => 13 )
*/
?>
------------------------------------------------------------------------
[2003-02-09 02:41:22] pajoye@php.net
Hi,
Can you provide a link with the test script and the font used ?
thank's
pierre
------------------------------------------------------------------------
[2003-02-07 10:03:02] ljpersson@hotmail.com
The problem still exists in snapshot 200302071430
for the _exact_ same text string imagettfbbox() (and the _exact_ same
test script) returns the following (different) values depending on
version of PHP and GD
Snapshot 200302071430
Array ( [0] => -1 [1] => 14 [2] => -1 [3] => -226 [4] => -16 [5] =>
-226 [6] => -16 [7] => 14 )
PHP 4.3 (official release)
Array ( [0] => -1 [1] => 13 [2] => -1 [3] => -226 [4] => -16 [5] =>
-226 [6] => -16 [7] => 13 )
PHP 4.2.3 (with GD 2.01)
Array ( [0] => 3 [1] => -1 [2] => 3 [3] => -234 [4] => -16 [5] => -234
[6] => -16 [7] => -2 )
The only correct values are with GD 2.01 for both PHP 4.3 and snapshot
the bounding box is incorrect since it starts 14 (in snapshot) or 13
(in 4.3) pixels in into the text.
------------------------------------------------------------------------
[2003-01-27 22:39:59] sniper@php.net
No feedback was provided. The bug is being suspended because
we assume that you are no longer experiencing the problem.
If this is not the case and you are able to provide the
information that was requested earlier, please do so and
change the status of the bug back to "Open". Thank you.
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The remainder of the comments for this report are too long. To view
the rest of the comments, please view the bug report online at
http://bugs.php.net/21560
--
Edit this bug report at http://bugs.php.net/?id=21560&edit=1