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14 messages in org.css-discuss.lists.css-d[css-d] font-family font sizes| From | Sent On | Attachments |
|---|---|---|
| David Sharp | Apr 24, 2007 3:07 am | |
| Simon White | Apr 24, 2007 3:30 am | |
| Philippe Wittenbergh | Apr 24, 2007 3:54 am | |
| David Sharp | Apr 24, 2007 10:50 pm | |
| Jukka K. Korpela | Apr 25, 2007 2:57 pm | |
| Philippe Wittenbergh | Apr 25, 2007 4:53 pm | |
| Jukka K. Korpela | May 17, 2007 2:44 pm | |
| Philippe Wittenbergh | May 17, 2007 7:03 pm | |
| Bruno Fassino | May 18, 2007 4:25 am | |
| Jukka K. Korpela | May 18, 2007 8:03 am | |
| Jukka K. Korpela | May 28, 2007 11:07 am | |
| Lori Lay | May 28, 2007 1:37 pm | |
| Jukka K. Korpela | May 28, 2007 1:54 pm | |
| Philippe Wittenbergh | May 28, 2007 5:19 pm |
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| Subject: | [css-d] font-family font sizes | Actions... |
|---|---|---|
| From: | Bruno Fassino (...@) | |
| Date: | May 18, 2007 4:25:23 am | |
| List: | org.css-discuss.lists.css-d | |
On 5/18/07, Philippe Wittenbergh <emps at l-c-n.com> wrote:
On May 18, 2007, at 6:44 AM, Jukka K. Korpela wrote:
On Thu, 26 Apr 2007, Philippe Wittenbergh wrote:
The only problem I have atm is finding the aspect value for a given font. The font contains that information, but I haven't found an utility to tell me that value, nor any resource for it - especially for fonts I don't have.
This sounds like an odd situation. Are we all expected to find out such things by ourselves?
I don't know if the following is accurate or not, anyway:
- The aspect ratio is defined as ratio between x-height and font-size. - The x-height is the unit used in CSS lengths expressed in 'ex'. - Gecko seems able to use an accurate 'ex' unit (I guess it is extracted from the font in use, even version not supporting font-size-adjust seem to have a good 'ex')
Putting together the above, if we trust Gecko, the aspect ratio of a font can be obtained simply observing the size of an element dimensioned using 'ex' units. I've created a quick and dirty test page [1], with includes due elements sized one in 'em' and another in 'ex'. A javascript gets the size of the elements in pixels and computes their ratio. This should be the aspect value of the font in use. To minimize errors a big font size is used (and the computation is repeated with some different font size / widths, the results compared, and discrepancies signaled.)
I get reasonable results, maybe with the exception of Verdana, where I get as aspect value 0.55 (not 0.58) In the page I've also added a red line drawn at 'baseline - x-height' to visually check the accuracy of the computed x-height. And there is the possibility to choose a second font family, which is then displayed (with and without font-size-adjust) together with the main one (Again: the page makes sense only if using Gecko.)
Bruno