#48732 [Com]: TTF Bounding box wrong for letters below baseline
| From: | lbayuk at pobox dot com | Date: | Fri, 03 Jul 2009 22:42:14 +0000 |
| Subject: | #48732 [Com]: TTF Bounding box wrong for letters below baseline | ||
| References: | 1 | Groups: | php.bugs |
| Request: | Send a blank email to php-bugs+get-139237@lists.php.net to get a copy of this message | ||
ID: 48732
Comment by: lbayuk at pobox dot com
Reported By: sta at netimage dot dk
Status: Open
Bug Type: GD related
Operating System: FreeBSD 7.1
PHP Version: 5.2.10
New Comment:
Duplicated in PHP-5.2.10 and also PHP-5.3.0. The descenders are being
excluded from the bounding box, at all angles. (Sigh. I was the one who
opened bug #43073 for rotated bounding boxes. My mistake for not
including characters with descenders in the original reproduce code.)
Previous Comments:
------------------------------------------------------------------------
[2009-07-03 11:02:32] sta at netimage dot dk
The fix for bug #48555 did not solve this problem - bug still open.
The test string should probably be changed to
"line1\nQÅDFqypådg!()/\%▓" so the new line problem from #48555 is
checked too.
------------------------------------------------------------------------
[2009-06-30 07:42:54] sta at netimage dot dk
To images, one rendered with PHP 5.2.9, the other with 5.2.10.
http://php.thing.dev.netimage.dk/48732_5_2_9.png
http://php.thing.dev.netimage.dk/48732_5_2_10.png
Both rendered on FreeBSD with freetype2-2.3.9_1 from ports.
------------------------------------------------------------------------
[2009-06-30 07:31:48] sta at netimage dot dk
Description:
------------
Bug #43073 fixed the bounding box for rotated texts.
Unfortunately the test case only used upper case ABCDEF for the test,
an not any letters that protrude below the text baseline.
Hence the returned bounding box is now wrong for text like ABCQÅqyp.
The code below is directly from bug #43073, only the font, demo-text
and font size has been changed.
Reproduce code:
---------------
<?php
$font = '/dana/data/ni_lib/ni_shop/fonts/CONGSEB.TTF'; # Full path to
any TTF Font
$delta_t = 360.0 / 16; # Make 16 steps around
$g = imagecreate(800, 800);
$bgnd = imagecolorallocate($g, 255, 255, 255);
$black = imagecolorallocate($g, 0, 0, 0);
$x = 100;
$y = 0;
$cos_t = cos(deg2rad($delta_t));
$sin_t = sin(deg2rad($delta_t));
for($angle = 0.0; $angle < 360.0; $angle += $delta_t) {
$bbox = imagettftext($g, 20, $angle, 400 + $x, 400 + $y, $black,
$font, 'QÅDFqypådg!()/\%▓');
imagepolygon($g, $bbox, 4, $black);
imagefilledellipse($g, $bbox [0], $bbox [1], 8, 8, $black);
$temp = $cos_t * $x + $sin_t * $y;
$y = $cos_t * $y - $sin_t * $x;
$x = $temp;
}
header( "Content-type: image/png");
imagepng($g);
Expected result:
----------------
That the rectangles contain the entire text, including the parts that
protrude below the text baseline.
Actual result:
--------------
Lower part of eg "q" are outside the box.
Images will be attached in a second.
------------------------------------------------------------------------
--
Edit this bug report at http://bugs.php.net/?id=48732&edit=1
