Re: Hang in font panel with certain fonts

[Fred Kiefer]

Am 19.01.2015 um 00:39 schrieb Riccardo Mottola <riccardo.mottola@libero.it>:
> Fred Kiefer wrote:
>> Sorry, you only show these values for the first iteration. In a loop we need 
>> to see whether these values change or not. Most likely the second iteration 
>> has the exact same values. In that case we are looking at a rounding issue. 
>> It seems like ascender plus descender are bigger than line_height, but when 
>> assigning this sum to line_height this condition is still true.
> 
> It is not the first iteration, it is the hundreth or so, I leave running and 
> then break and copy what I see. It is difficult to know in the console flow 
> "when" the loop begins amidst all the printouts.
> 
> Ascender + Descender differ from line height here only by 0,00001
> 
> this is after a couple of seconds:
> 
> 2015-01-19 00:19:35.047 Ink[322] 2-WantLineHeight a:10.285714, d:2.571429, 
> y:0.000000 | lineh: 12.857142, maxl: 0.000000
> 2015-01-19 00:19:35.050 Ink[322] f_ascender: 10.285714
> 
> this is after a couple of minutes
> 
> 2015-01-19 00:26:04.893 Ink[322] 2-WantLineHeight a:10.285714, d:2.571429, 
> y:0.000000 | lineh: 12.857142, maxl: 0.000000
> 2015-01-19 00:26:04.896 Ink[322] f_ascender: 10.285714
> 
> it is exactly the same
> 
>> Could you please first verify whether this is true and next find out if your 
>> computer uses float or double for CGFloat? The next step might then be to 
>> get David to look at the assembler code the macro gets converted into.
> How do I know what CGFloat is? being 32bit I suppose float, but where do we 
> configure that?
> 
> I added this in the Macro:
> 
>    if (__new_height > line_height) \
>      { \
>        line_height = __new_height; \
>        NSLog(@"lh = %f, h = %f, gt? %d", line_height, h, line_height > h); \
>        COMPUTE_BASELINE; \
>        goto restart; \
>      } \
> 
> this is the output (other log removed):
> 2015-01-19 00:39:12.193 Ink[1887] lh = 12.857143, h = 12.857143, gt? 0

By using %f you assume that you have a float here not a double. Which should 
settle the question about CGFloat. 
And the NSLog statement is exactly what I would like to know, but rather before 
the if statement and not after the assignment. And maybe you should also 
inspect __new_height although it gets assigned with h.

Fred