Re: How to get the actual face attribute?

[Perry Smith]

> On Jun 22, 2020, at 12:00 PM, Yuan Fu <casouri@gmail.com> wrote:
> 
> 
> 
>> On Jun 21, 2020, at 11:54 AM, Stefan Monnier <monnier@iro.umontreal.ca> 
>> wrote:
>> 
>>> When writing my package I need to get height of the face at point.
>> 
>> Note that there may be simultaneously several different such heights if
>> point is shown simultaneously in different frames.
>> 
> 
> Thanks. Unfortunately I think I asked an x-y question. What I really want to 
> know is the width of the glyph and I thought I can just multiply the height 
> factor to the original width of the glyph. It seems not to be the case. The 
> multiplied result doesn’t match with the width on glass. More precisely 
> :height * glyph width != posn of point after - posn of point. Is this 
> expected?
> 
> Also I can’t use posn for calculation since sometimes the text might not be 
> on screen. 

It might help to explain what the bigger objective is.