Re: How is glyph shaping done?

From: Deborah Goldsmith (
Date: Mon Feb 03 2003 - 13:58:08 EST

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    For information on how this is handled on Mac OS, please see:

    Deborah Goldsmith
    Manager, Fonts & Unicode
    Apple Computer, Inc.

    On Friday, January 31, 2003, at 11:03 AM, John Hudson wrote:

    > On Windows, the shaping engines for complex scripts are part of
    > Uniscribe (usp10.dll) and make use of OpenType font technology. An
    > Arabic OpenType font will contain layout features for Initial <init>,
    > Medial <medi> and Final <fini> substitutions (and possibly Isolated
    > <isol>, e.g. to handle contextual variation of the letter heh).
    > Uniscribe analyses strings of Arabic text, keeps track of the position
    > of letters and their neighbours, and implements the appropriate layout
    > feature for each letter.
    > For more information, see
    > and the MS Arabic font specification at

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