Re: [fltk.development] [RFE] STR #2941: RFE: fl_text_extents(): supportmultiplelines

2013-03-27 Thread Greg Ercolano 
*Correction*

   In particular how the two functions calculate differently the bounding 
 region
   for the characters ('), (-), and (_); fl_measure() returns the *SAME* 
 x,y and height
   for those characters, whereas fl_text_extents() does not.


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Re: [fltk.development] [RFE] STR #2941: RFE: fl_text_extents(): supportmultiplelines

2013-03-27 Thread chris 
Ah, I think I understand the difference now, will have a look at the test
 tomorrow...
Though at now cannot imagine a use case for knowing the inking area.
Thanks for clarifying.
- chris

*Correction*

  In particular how the two functions calculate differently the bounding 
 region
  for the characters ('), (-), and (_); fl_measure() returns the *SAME* 
 x,y and height
  for those characters, whereas fl_text_extents() does not.


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Re: [fltk.development] [RFE] STR #2941: RFE: fl_text_extents(): supportmultiplelines

2013-03-27 Thread Ian MacArthur 

On 27 Mar 2013, at 20:16, chris wrote:

 Ah, I think I understand the difference now, will have a look at the test
 tomorrow...
 Though at now cannot imagine a use case for knowing the inking area.

Ah, but it turns out that there are quite a lot of uses for knowing the inked 
area of a typographical element.

Not so much for rendering strings of text though; in that case fl_measure if 
usually the right thing.
But if you are rendering text for other purposes, it is often beneficial to 
know what the actual extents are, since they are usually smaller, some times 
much smaller, than the sizes reported by fl_measure.
Even using fonts decoratively, it is useful to know the extents...

For my own part, for example, I often use fl_text_extents to measure glyphs 
from musical fonts, to ensure that they are positioned on the staff accurately, 
and suitably sized. The values returned by fl_measure are pretty well useless 
for this purpose.

So, maybe not all that everyday a use case for most folks, I guess, but a real 
one nonetheless!

Cheers,
-- 
Ian




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