Re: 28th IUC paper - Tamil Unicode New

From: James Kass (
Date: Sun Aug 21 2005 - 23:30:22 CDT

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    Richard Wordingham wrote,

    > By the way, why can't font-encoded Tamil (e.g. using ASCII codes as a hack)
    > display be handled on Windows by a GSUB table that handles the re-ordering?
    > Or would that make it Level-2 anyway? Where can I find a definition of
    > 'Level-2'?

    Because shaping engines won't look for non-Tamil characters in
    Tamil OpenType subtables. (Think of the performance hit on
    large text files.)

    Likewise, Windows shaping engine doesn't enable Tamil- (or Indic-)
    style OpenType features for Latin characters. (Although it may
    be possible to hack something for reordrant vowel signs using
    contextual substitution. Then an application supporting Latin
    contextual substitution would be necessary.)

    Possibly the best approch for font-encoded Tamil is to convert
    it to Unicode. (Optionally, send the converted file to the author
    or web site manager for possible posting.)

    Best regards,

    James Kass

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