How is glyph shaping done?

From: Mete Kural (metekural@yahoo.com)
Date: Fri Jan 31 2003 - 12:28:25 EST

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    Hello,

    After one of the replies that I received for my
    previous question, I thought of a more general
    question about how glyph shaping is done. I'm just
    wondering, when a Unicode rendering program is doing
    glyph shaping for Arabic (or any other language with
    similar properties), would the program first convert
    all Unicode Arabic characters in the 06XX domain into
    Arabic presentation forms in the FXXX domain, and then
    render each one of these presentation forms one by one
    and join them together? Or are there other possible
    ways to do glyph shaping in Unicode?

    So does this mean that every character rendered on the
    screen in a Unicode-enabled program such as Internet
    Explorer or some editor, have a corresponding
    presentation form Unicode associated to it?

    Thanks,
    Mete

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