note 97211 added to function.imagettfbbox

As many of you know, this function is bugged in several versions of PHP. It should return the coordinates relative to the baseline of the font. So if your text includes characters like g and p then the bounding box should extend below zero on the Y axis, however it doesn't. This is a problem because imagettftext() positions text using the baseline, so all your text will be misaligned. My solution is to create an image of the desired font and font-size using all ascii characters with imagettfbbox() and imagettftext(). The height of this image is used as the height for the real image. I then analyse the image to get the vertical offset of the text (the background color should be $baseColor) <?php function getYOffset($image, $baseColor) { for($y = 0; $y < $this->height(); $y++) for($x = 0; $x < $this->width(); $x++) if (imagecolorat($image, $x, $y) !== $baseColor) return $y; } ?> This offset can be used as the baseline for the font (for this font-size). You can use a similar trick for the horizontal offset, but that changes depending on the first character. ---- Server IP: 69.147.83.197 Probable Submitter: 84.13.60.134 ---- Manual Page -- http://www.php.net/manual/en/function.imagettfbbox.php Edit -- https://master.php.net/note/edit/97211 Del: integrated -- https://master.php.net/note/delete/97211/integrated Del: useless -- https://master.php.net/note/delete/97211/useless Del: bad code -- https://master.php.net/note/delete/97211/bad+code Del: spam -- https://master.php.net/note/delete/97211/spam Del: non-english -- https://master.php.net/note/delete/97211/non-english Del: in docs -- https://master.php.net/note/delete/97211/in+docs Del: other reasons-- https://master.php.net/note/delete/97211 Reject -- https://master.php.net/note/reject/97211 Search -- https://master.php.net/manage/user-notes.php