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Using imagettfbbox with Arial Bold [message #173252]

Thu, 31 March 2011 04:26

jwcarlton
Messages: 76
Registered: December 2010

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Member

I'm using imagettfbbox() to find the width of a variable-driven text
object. Like this:

$variable = "Business";
$fontsize = "9";
$fontface = "arialbd.ttf";

function get_bbox($text) { return imagettfbbox($fontsize, 0,
$fontface, $text); }

function t_width($text) {
$box = get_bbox($text);
$width = $box[4] - $box[6];

return $width;
}

$text_width = t_width($variable);

If I use arial.ttf, this works perfect. But I'm trying to find the
width of Arial Bold, which I assume is arialbd.ttf. When I change
$fontface to "arialbd.tff", the width comes out shorter than it should
be (my test phrases are coming out with a width anywhere from 0 to 7px
shorter than they really are).

For example, <font face="Arial"><b>Business</b></font> actually
measures 52px, but the above is returning 49px.

This is on a Linux machine, with GD2 installed.

Any suggestions on why this font is calculating incorrectly? Is there
a different/better way to measure bold text?

TIA,

Jason

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[Message index]

		Using imagettfbbox with Arial Bold By: jwcarlton on Thu, 31 March 2011 04:26
		Re: Using imagettfbbox with Arial Bold By: alvaro.NOSPAMTHANX on Thu, 31 March 2011 07:16
		Re: Using imagettfbbox with Arial Bold By: jwcarlton on Thu, 31 March 2011 07:47
		Re: Using imagettfbbox with Arial Bold By: alvaro.NOSPAMTHANX on Thu, 31 March 2011 11:26
		Re: Using imagettfbbox with Arial Bold By: The Natural Philosoph on Thu, 31 March 2011 13:27
		Re: Using imagettfbbox with Arial Bold By: jwcarlton on Fri, 01 April 2011 03:49
		Re: Using imagettfbbox with Arial Bold By: alvaro.NOSPAMTHANX on Fri, 01 April 2011 07:26
		Re: Using imagettfbbox with Arial Bold By: jwcarlton on Tue, 05 April 2011 03:27

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