[HarfBuzz] bug in `hb_ot_layout_lookup_collect_lookups'

[Behdad Esfahbod]

On 14-04-14 12:20 AM, Werner LEMBERG wrote:
> 
> Behdad,
> 
> 
> I guess I've found a bug in `hb_ot_layout_lookup_collect_glyphs'.  In
> FreeType's `src/autofit/hbshim.c', I'm calling it like this:
> 
>   hb_ot_layout_collect_lookups( face,
>                                 HB_OT_TAG_GSUB,
>                                 script_tags,
>                                 NULL,
>                                 coverage_tags, 
>                                 gsub_lookups );
> 
> Testing it with `lohit_hi.ttf' (version 2.4.1), it returns the
> following lookup indices for the `deva' script:
> 
>   0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25
>   26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48
>   49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71
>   72 73 74 80 83
> 
> However, there are more GSUB lookups, referenced via chained context
> lookups, AFAICS.  Example: lookup 76, which gets referenced in
> lookup 4.
> 
> I presume that this is not intentional behaviour.

It *is* intentional behavior.  What's your exact use case?

behdad


> 
>     Werner
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-- 
behdad
http://behdad.org/