[OS X TeX] A working version of emacs (fwd)

[Joseph C. Slater]

On May 11, 2005, at 8:45 AM, Peter Dyballa wrote:

>
> Am 11.05.2005 um 13:49 schrieb Joseph C. Slater:
>
>
>> Too bad we can't convince the authors of the distributions to  
>> include this capability. This is an issue about which I (clearly)  
>> know nothing. Have you asked them in the past?
>>
>
>
> No, Joe, because they can't do anything. I complained in bug  
> reports a few times, but not that much progress. The problem is in  
> Carbon Emacs' past, the way it was prepared for Mac OS 9. The font  
> selection is based on mimicking an X11 mechanism instead of using  
> proper ATSUI or such things, as Emacs-on-Aqua uses.
>
> To change this you'd need to re-write a lot of C and Elisp code.  
> This then *has* to be accepted by Richard Stallman to become  
> integrated into Emacs' core. Could be YAMAMOTO Mitsuharu can do  
> something. Last December he introduced a new Elisp function in CVS,  
> create-fontset-from-mac-roman-font, which makes the creation of  
> fontsets easier. (Some elderly Carbon Emacsen as ECE don't  
> understand it.)
>
> I think Emacs is clever enough to understand that a particular font  
> needs to be selected to display a particular glyph. The problem  
> only is that it gets fonts and font encodings presented that are  
> incorrect, so no real complete and correct vector of glyphs can be  
> built. The reason for this malfunction probably, that Andrew Choi's  
> routines only read the pretty restricted Mac Roman (+ Mac Chinese,  
> Mac Japanese, Mac Korean) map of a font (since Unicode's not that  
> Macish, just remember the many language kits patches), while  
> TrueType fonts usually have an extremely rich MS-Unicode map of a  
> few thousand glyphs, some have an extra 'pure' Unicode map (to be  
> more exact: the CMAP property of a TT font can have several 'sub- 
> fonts' built from a big reservoir in it in a specific encoding,  
> proper specs are the platformName/platformID {Unicode/0 | Macintosh/ 
> 1 | Microsoft/3}, scriptName/scriptID {Roman/0 | Unicode/1 |  
> Unicode/3 | SurroGATES/10}, no sorrow Gates!, encodingID and the  
> format, in which this is written into the font). The X11 interface  
> can make use of this wealth, the Cocoa interface too.
>

My head hurts now.
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