I asked the same question a couple of months ago and got zero
response. However, i was able to find, by experiment, an answer which
seems to work. Caveat: no documentation exists to verify this. In
fact all the documentation contradicts it. However the actual
behavior of the Apple typesetter contradicts the documentation, and
agrees with my experiments, at least for the sizes and fonts I have
tried. The following code works for me:
float adv = [termFont advancementForGlyph:
[termFont glyphWithName:@"space"]].width;
charSize.width = (int)(adv+0.5); /* font size must be < 17. */
charSize.height = [layoutMgr defaultLineHeightForFont:termFont];
Note that if the Font Size is 17 or greater, the fractional floating
advance seems to be used. Go Figure!
Dale Miller
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