[Bug 13801] Very slow text rendering in AutoCAD

[wine-bugs at winehq.org]

http://bugs.winehq.org/show_bug.cgi?id=13801





--- Comment #6 from max at veneto.com  2008-06-21 04:47:35 ---
BTW, ExtTextOutW is the culprit for this bug, but there's another slow down,
seen on particular zoom factors. It doesn't make use of ExtTextOutW but makes
panning even slower (5-6 seconds for a pan...) on my test drawing.
Fonts are "paint" as strange blocks... I must still investigate if autocad uses
a third way to "optimize" them for this scale factor.
I'm thinking that it makes some bitmaps and puts them on screen with some sort
of bitblt operation, but thato one should be another bug report, I guess.

I don't know if it makes sense to attatch a test drawing, as these bugs depends
on zoom factor, so on user screen resolution, sizes of autocad window on screen
and so on.
My test drawing is composed of a matrix of 33x17 single line texts, size 30,
spaced normally (about 1/2 size vertically, 1 size orizontally) containing
string "PIPPO", in Bookman Old Style font; anyways any true type font does the
job.

Max


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