To: unicode(at)unicode.org
From: Andrew C. West andrewcwest(at)alumni.princeton.edu
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Subject: Re: Combining diacriticals and Cyrillic
Body: On Fri, 11 Jul 2003 13:15:14 +0200, Philippe Verdy wrote:

> The Win32 Text APIs (such as TextOut) actually DO support UniScribe
> transparently on Windows XP... In most applications, this means that the
> UniScribe support works without requiring explicit calls to the Uniscribe API.

Surely some mistake here.


Starting with Microsoft Windows 2000, these functions [TextOut, ExtTextOut,
TabbedTextOut, DrawText, and GetTextExtentExPoint] have been extended to support
complex scripts. In general, this support is transparent to the application.



The [Uniscribe] ScriptTextOut function takes the output of both ScriptShape and
ScriptPlace calls and calls the operating system ExtTextOut function
appropriately.


Now if Uniscribe's ScriptTextOut function calls ExtTextOut, and according to
Philippe ExtTextOut utilises Uniscribe to output text ...

No, I don't think so. There is a big difference between support complex
scripts (MSDN) and support UniScribe (Philippe). I don't know what the exact
implementation of complex script support is for ExtTextOut etc., but I'm pretty
sure that it is independant of Uniscribe. Maybe I'm wrong, but at least I'm not
going to dress up a wild guess as a statement of certain fact as Philippe so
likes to do (and it is disingenuous of him to pretend that we are all picking on
him because his English is not good enough - there's nothing ambiguous about his
misleading statements, and if he wants to repeat them in French they'll still be
misleading or just plain wrong).

Andrew