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bug#25945: Emacs aborts while calling FT_Load_Glyph
From: |
Werner LEMBERG |
Subject: |
bug#25945: Emacs aborts while calling FT_Load_Glyph |
Date: |
Fri, 03 Mar 2017 09:32:17 +0100 (CET) |
>> New code for (a) is quite simple:
>>
>> if (FT_Load_Glyph (ft_face, g->g.code, FT_LOAD_DEFAULT) != 0)
>> if (FT_Load_Glyph (ft_face, g->g.code, FT_LOAD_NO_HINTING) != 0)
>> ...
>
> This should probably be accompanied by a suitable FONT_ADD_LOG call,
> to mention that this fallback was taken.
Yes, perhaps. However, if all glyphs are broken you will get a huuge
logfile...
>> My knowledge of Emacs internals is too small to provide an
>> implementation for (b).
>
> I think it's too late for (b) when we discover this problem in
> ftfont_get_metrics. To do (b) we should have discovered this in
> ftfont_has_char, or thereabouts.
Interesting. How comes that Emacs aborts right there?
A note regarding the Padauk font: The problem is partly due to
FreeType 2.7.1, which has a stricter looping limit for TrueType
bytecode to detect endless loops – for this font, however, the limit
is a bit too strict; I will fix this in the next FreeType release.
Regardless of that, the bytecode in Padauk *is* buggy, and I've
already contacted the maintainers, asking for a new release using a
new, fixed ttfautohint version.
https://github.com/silnrsi/font-padauk/issues/12
Werner
- bug#25945: Emacs aborts while calling FT_Load_Glyph, Werner LEMBERG, 2017/03/03
- bug#25945: Emacs aborts while calling FT_Load_Glyph, Eli Zaretskii, 2017/03/03
- bug#25945: Emacs aborts while calling FT_Load_Glyph,
Werner LEMBERG <=
- bug#25945: Emacs aborts while calling FT_Load_Glyph, Eli Zaretskii, 2017/03/03
- bug#25945: Emacs aborts while calling FT_Load_Glyph, Werner LEMBERG, 2017/03/03
- bug#25945: Emacs aborts while calling FT_Load_Glyph, Eli Zaretskii, 2017/03/03
- bug#25945: Emacs aborts while calling FT_Load_Glyph, Werner LEMBERG, 2017/03/04
- bug#25945: Emacs aborts while calling FT_Load_Glyph, Eli Zaretskii, 2017/03/04
bug#25945: Emacs aborts while calling FT_Load_Glyph, Eli Zaretskii, 2017/03/11