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List:       freetype-devel
Subject:    Re: [Devel] Regarding the layout table formats & FreeType 2
From:       Werner LEMBERG <wl () gnu ! org>
Date:       2004-03-27 7:22:39
Message-ID: 20040327.082239.173862767.wl () gnu ! org
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> - generally speaking, tables are not parsed directly in memory.
>   Instead, similarly to the OTL support in FreeType 1, the code does
>   load all data into library-specific structures, and does all
>   processing within these.  This is however an implementation detail
>   that is not revealed by the API, and could be changed (hopefully)
>   in the future. [...]
>
>   I'd like to remind you that all OTL and AAT tables are clearly
>   designed in a way that parsing them directly in memory is
>   infinitely easier.  The hard part is validating the input to
>   ensure that you will not jump to unkown areas of memory due to a
>   bad offset.  you clearly don't want to check every offset in the
>   table during glyph processing :-)

With other words, in a not too distant future we will use the stuff in
the `otlayout' directory for validation...

>   other than that, the code itself is very solid. There are
>   countless little thwarts that can be (very easily) fixed
>   though.  For example:

This is something for me :-)  I'm quite good as an `obasan' (I hope
that it has the same meaning in Japan as it has in Taiwan :-).


    Werner

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