Re: Hang in font panel with certain fonts

[Fred Kiefer]

Not being able to debug this is bad. Eric's idea was of course the best way to 
do this, but now we have to fall back to my last suugestion, that you seem to 
have forgotten. What I would do is scatter around NSLog statements in the whole 
loop to find out where the iteration is happening. Add one log before and after 
the loop and one at the beginning and another at the end and more every ten 
lines in the loop. This is really a brute force attempt and if you are unlucky 
it will again make the code work without giving you further information.

The other way to track down usages of uninitialized data is to use valgrind. 
But this is rather hard for you to do if you have no experiance with that tool.

Most likely the glyph width of zero is the underlying problem, but we still 
need to see how this affects the code.

Fred

On the road

Am 17.01.2015 um 10:52 schrieb Riccardo Mottola <riccardo.mottola@libero.it>:

> Hi,
> 
> Fred Kiefer wrote:
>> All of this is based on the asumption that the "Main glyph layout loop. i:" 
>> output comes from inside the main loop, that is from below line 732.
> that was try as I wrote. Since with debug symbols everything works, this is 
> the "end" of the loop when it works:
> 
> 
> 2015-01-17 10:42:54.735 Ink[2050] Main glyph layout loop. i:15
> 2015-01-17 10:42:54.737 Ink[2050] glyph size 6.857143 0.000000
> 2015-01-17 10:42:54.739 Ink[2050] moving to next glyph
> 2015-01-17 10:42:54.740 Ink[2050] Main glyph layout loop. i:16
> 2015-01-17 10:42:54.742 Ink[2050] glyph size 6.857143 0.000000
> 2015-01-17 10:42:54.744 Ink[2050] moving to next glyph
> 2015-01-17 10:42:54.746 Ink[2050] Main glyph layout loop. i:17
> 2015-01-17 10:42:54.748 Ink[2050] glyph size 6.857143 0.000000
> 2015-01-17 10:42:54.750 Ink[2050] moving to next glyph
> 2015-01-17 10:42:54.752 Ink[2050] Main glyph layout loop. i:18
> 2015-01-17 10:42:54.753 Ink[2050] glyph size 6.857143 0.000000
> 2015-01-17 10:42:54.755 Ink[2050] moving to next glyph
> 2015-01-17 10:42:54.757 Ink[2050] Main glyph layout loop. i:19
> 2015-01-17 10:42:54.759 Ink[2050] glyph size 6.857143 0.000000
> 2015-01-17 10:42:54.761 Ink[2050] moving to next glyph
> 2015-01-17 10:42:54.763 Ink[2050] Main glyph layout loop. i:20
> 2015-01-17 10:42:54.765 Ink[2050] GSHorizontalTypeSetter - howMany 0
> 2015-01-17 10:42:54.768 Ink[2050] layoutNewParagraph: 0
> 
> if I recompile without debug symbols,
> 2015-01-17 10:49:09.767 Ink[3547] Main glyph layout loop. i:3
> 2015-01-17 10:49:09.769 Ink[3547] glyph size 8.000000 0.000000
> 2015-01-17 10:49:09.771 Ink[3547] moving to next glyph
> 2015-01-17 10:49:09.773 Ink[3547] Main glyph layout loop. i:4
> 2015-01-17 10:49:09.775 Ink[3547] GSHorizontalTypeSetter - howMany 0
> 2015-01-17 10:49:09.776 Ink[3547] layoutNewParagraph: 0
> 2015-01-17 10:49:09.786 Ink[3547] layoutGlyphsInLayoutManager index 0 howMany > 0
> 2015-01-17 10:49:09.788 Ink[3547] layoutNewParagraph: 1
> 2015-01-17 10:49:09.801 Ink[3547] layoutGlyphsInLayoutManager index 0 howMany > 0
> 2015-01-17 10:49:09.803 Ink[3547] layoutNewParagraph: 1
> 2015-01-17 10:49:09.826 Ink[3547] f_ascender: 10.285714
> 2015-01-17 10:49:09.828 Ink[3547] Main glyph layout loop. i:0
> 2015-01-17 10:49:09.830 Ink[3547] f_ascender: 10.285714
> 2015-01-17 10:49:09.831 Ink[3547] Main glyph layout loop. i:0
> 2015-01-17 10:49:09.833 Ink[3547] f_ascender: 10.285714
> <....>
> 
> This at least means that it is not stuck at the "end" because they do not 
> overlap, sizes are different, ascenders
> 
> Can I print out glyphs somehow, so we know what is it trying to print out?
> 
> Riccardo
> 
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