On Dec 2, 2003, at 3:57 PM, Frank Yung-Fong Tang wrote:
Think about this, while Microsoft support Unicode cmap and really
encourage people to use Unicode, they ALSO publish the WGL4 and the
OpenType font spec for different script. They also say which format a
font SHOULD support in TTF cmap. That does not conflict with the goal of
"Using Unicode" at all.
Apple doesn't specify which cmap subtable format to use because we don't care. Any of the cmap subtable formats may be used with any range of data for which they are valid.
Similarly, we don't publish an AAT script for different scripts because it's unnecessary. There is no particular model for each script to which a font must conform in order to work. You can make an AAT font for your font according to what your font can do; you can make an AAT font for a script which doesn't have official support yet.
For example, if I want to customize my "last resort" behavior in MacOS X
with ATSUI (by drawing a Frank Tang picture with a Unicode Decimal value
below it- a way nobody want to implement- everyone live Unicode Hex,
right. Just want to make an extreme case that for sure John won't crazy
enough to add them into ATSUI.) in my application, how can I do it now?
You turn off font substitution for your layout, get the glyph array back, scan for glyph ID -1, and substitute as appropriate. Or, if you want to limit font substitution to a subset of the installed fonts, you can do that for your layout object, too.
======== John H. Jenkins [EMAIL PROTECTED] [EMAIL PROTECTED] http://homepage..mac.com/jhjenkins/
