Re: Need help understanding how things fit together
- From: Behdad Esfahbod <behdad behdad org>
- To: Anthony Kraft <anthony allen kraft gmail com>
- Cc: gtk-i18n-list gnome org
- Subject: Re: Need help understanding how things fit together
- Date: Tue, 20 Jan 2015 11:20:15 -0800
On 15-01-20 11:10 AM, Anthony Kraft wrote:
FT has a function FT_Get_Char_Index to get a glyph index from a unicode char
code. Therefore, it seems you can feed Unicode + font file to FT directly and
rasterize. What is the benefit of using HarfBuzz to do the unicode to glyph
mapping instead of using FT directly?
HarfBuzz does what's called "complex" shaping. Ie, if you use
FT_Get_Char_Index, you won't get the correct shapes for Arabic, Indic
languages, Thai, etc. You won't get things like ligatures, mark positioning,
etc either.
See images here:
http://goo.gl/2wSRu
--
behdad
http://behdad.org/
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