[Q] FMDeactivateFonts
[Q] FMDeactivateFonts
- Subject: [Q] FMDeactivateFonts
- From: Mark de Jong <email@hidden>
- Date: Sat, 18 May 2002 23:52:54 -0700
Hi!
I've written a Cocoa application that allows previewing of fonts. I'd
like to be able to display fonts regardless of whether they've been
activated by the system or not, so I use FMActivateFonts() to activate
them and then use FMDeactivateFonts() when I'm done with them.
What I've noticed is that the fonts display fine as long as I never call
FMDeactivateFonts(). Once I call FMDeactivateFonts(), and then try to
re-activate them and view them, I get an error like this:
----------
Failed to set font ("CGS Helvetica-Bold 15.98 pt. P [] (0x0190fca0)
fobj=0x01911840, spc=0.00") ATSUStyle 0x14BF850
----------
When I use gdb to view an NSFont, I notice the following. If
FMDeactivateFonts() has not been called, then:
(gdb) po aFont
"CGS Helvetica-Bold 16.00 pt. P [] (0x019528c0) fobj=0x01952440,
spc=4.45"
However, as soon as FMDeactivateFonts() has been called on the font and
a subsequent FMActivateFonts() is called, I get:
(gdb) po aFont
"CGS Helvetica-Bold 16.00 pt. P [] (0x0193ff90) fobj=0x01951e70,
spc=0.00"
and the font displays incorrectly, or sometimes doesn't display at all.
It seems to be due to the "spc=0.00" rather than "spc=4.45".
Is there some trick to using FMActivateFonts() and FMDeactivateFonts()
correctly? Here's a snippet of code that I use:
...
if( activate ) {
err = FMActivateFonts( &myFontFSSpec, NULL, NULL, globalScope ?
kFMUseGlobalScopeOption : kFMDefaultOptions );
}
else {
err = FMDeactivateFonts( &myFontFSSpec, NULL, NULL,
kFMDefaultOptions );
}
...
where "activate" and "globalScope" are booleans passed into the method.
I have tried the different constant variations for local and global
scope without any change in symptom. I have also used "NULL" as the last
parameter to FMDeactivateFonts() with no change. Depending on the
documentation I have found, the constants passed in these functions have
different names.
Thanks, in advance, for any insight you can offer into this dilemma.
-- Mark
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