Dnia Wed, Mar 05, 2008 at 10:17:33AM +0100, Taco Hoekwater napisał(a): Thanks for the answers; still, some things are not clear for me.
2. What does exactly sa mean? Do I get it right when I think that it's the factor by which the "body font size" - i.e., some constant dimen parameter defined for the whole document (or environment) - is multiplied? Does the "laziness" of sa mean that the actual scaling will happen _after_ the definition of the body font size, which might be e.g. different for different components of a product within a project using a common environment? And what is mo?
sa stands for "scaled at", mo stands for "mapped on".
One of them (I think sa) is a multiple of the value you specify at \setupbodyfont[..] or \switchtobodyfont[..], the other is (I think) in relation to the actual current font size (so it is different whether \tfx or \tfa is in effect).
Still don't get it. I tried the following example, just to see what happens (sorry, I know it looks terrible): \definefont [TitleFont] [Serif sa b] \definefont [TitleFontTwo] [Serif mo b] \starttext Hello World!\par {\TitleFont Hello world!\par} {\TitleFontTwo Hello world!\par} And with viii: {\viii Hello World!\par {\TitleFont Hello world!\par} {\TitleFontTwo Hello world!\par}} And with switchtobodyfont: {\switchtobodyfont[8pt] Hello World!\par {\TitleFont Hello world!\par} {\TitleFontTwo Hello world!\par}} \stoptext No difference between sa and mo using this example... (Right after looking at the results, I \show-ed \viii and noticed that \viii and \switchtobodyfont[8pt] do essentially the same. What's the use of having them both?)
4. What are the relations between \definefontsynonym, \definefont and \definebodyfont?
things defined with \definefontsynonym can be used in the right hand side of assignments in arg #3 of \definebodyfont, and in the #2 argument of \definefont.
So to be sure: I can use names defined by \definefontsynonym in place of font filenames?
\definefont has no real relation to font switching, it is just a low-level shortcut for a specific font, much like a bare \font command in plain TeX, except that it allows synonyms and sa/mo.
So it just _defines_ (what a surprise!) some command to be a font-switching macro?
\definebodyfont is used to build up font collections
Still, I have no idea about the relation between these three... Here's what I seem to understand now: \definebodyfont is a mystery to me; \definefontsynonym defines #1 to mean the same as #2, where #2 may be another "synonym" or a filename (and then you have - or may? - provide encoding informaction in #3). It doesn't support sa or mo, and that's ok, because its use is just fiddling with _names_; \definefont is similar to \definefontsynonym except that it allows scaling and does not allow filenames (only "synonyms"). How much of that is right?
5. I can understand neither the paragraph right before the \definebodyfont example on page 4 of mfonts.pdf, nor the example itself.
That paragraph is a bit confusing to me as well. Browsing through type-siz.tex may help (in tex/context/base).
I'll try that too soon...
Best wishes, Taco
Thanks in advance -- Marcin Borkowski (http://mbork.faculty.fmcs.amu.edu.pl) Nie wiesz nawet, jak cenny jesteś w Moich oczach! Jezus