[HarfBuzz] How to make sure an hb_font_t object is valid?

Ebrahim Byagowi ebraminio at gmail.com
Thu May 30 06:44:13 UTC 2019

Oh hb_font_t, I am sorry, as far as I know they are always valid, I don't
know of a case that it can be invalid other than having an invalid
hb_face_t. Maybe others can help better on this. Relying on hb_shape_full
result is not that common practice as most of clients don't use it and they
use hb_shape which returns void, I suggest you to stick to that also.

On Wednesday, May 29, 2019, Ebrahim Byagowi <ebraminio at gmail.com> wrote:

> Getting glyph count is just as good anything you can thing, if a font
> doesn't have a glyph it is either empty or corrupted, there no valid use
> case for such AFAICU
> On Wednesday, May 29, 2019, Eli Zaretskii <eliz at gnu.org> wrote:
>> Last time I asked a similar question, I was told to use
>> hb_face_get_glyph_count.  But eventually I need to know that an
>> hb_font_t I create from the face is valid and can be used for
>> shaping.  What are the best practices for doing that?
>> Or maybe the shaper will return 'false' when given an invalid font,
>> and all I need is to test the return value of the shaper?
>> TIA
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