[cairo] Cairo/FreeType integration [Advanced]
britten at caris.com
Fri Oct 10 08:01:43 PDT 2008
Behdad Esfahbod wrote:
>> I'm uncertain if the FT_Face I give you connects back to our
>> FT_Library (and driver), or if you'll end up using your own
>> instance (without our driver), meaning you'd be unable to get the
>> correct FT_Glyph.
> If you provide cairo with your FT_Face, we use the library from that.
> Simply use cairo_ft_font_face_create_for_ft_face() and it should all
Phew! Many thanks for confirming this! I hadn't traced through the
various FT data structures to determine this.
On to coding then... :)
> Right, but a FreeType+ICU combo need not do any rasterization to begin
> with. You can do all your shaping with ICU and feed cairo with glyph
> indices. It would be better if you ask cairo for glyph metrics, but
> that's not a huge deal.
Hmmm... That's twice you've mentioned that now, so I guess I should
maybe pursue this point a bit more...
[ I'm sure you can understand my hesitation to disturb our existing,
stable, tested solution, without knowing *why* ... ]
So, why would it be "better" to use Cairo for glyph metrics?
Accuracy? Performance? Other?
As always, thanks for any information. (And your patience! :) )
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