Re: [NTG-context] Simplefonts

13 Oct 2013

      On 10/13/2013 01:39 AM, Wolfgang Schuster wrote:
...
Am 12.10.2013 um 15:04 schrieb Zhichu Chen mailto:zhichu.chen@gmail.com>:
...
Hi Wolfgang,
Good to know that, but I might have some questions.
On Fri, Oct 11, 2013 at 2:02 AM, Wolfgang Schuster 
mailto:wolfgang.schuster@gmail.com> wrote:
Hi all,
\definefallbackfamily [mainface] [serif] [DejaVu Serif]
    [range=cyrillic,force=yes]
What if I want to use the CJK font? The code in "font-sel.mkvi" hints 
I could use range=chinese but it didn't work. I have to use interval 
{0x00400-0x2FA1F} explicitly.
When you take a look into char-def.lua you can see names certain 
character ranges and “range=cyrillic”
used such a name.
For a chinese font you need 
“range={cjkunifiedideographs,cjkunifiedideographsextensiona,…}".
Because the list with names is very long you do this setup only once 
with the \definefontfamilypreset
command, e.g.
\definefontfamilypreset[chinese][range={cjkunifiedideographs,cjkunifiedideographsextensiona,…}]
and load this setup when you set the font with 
\definefontfamilyfallback, e.g.
\definefontfamilyfallback[<typeface>][<style>][<font>][preset=chinese]
For the moment I added three presets “chinese”, “japanese” and 
“korean” but they need better
names, e.g. “range:chinese” because there could be also 
“features:chinese” etc.
I get it now. I can put range and features of the fallback fonts in the 
preset.
...
...
And how can I assign the boldfont, italicfont and bolditalicfont? I'm 
currently using the Adobe Song Std as the regular font but it didn't 
come with a bold version or else, hence I might need this feature.
The module provides keys to apply a certain font and feature for each 
alternative (upright, italic etc.)
of a font, a complete list with all keys is shown in the table below.
-------------------------------------------------------
| Alternative | Font            | Feature             |
|-----------------------------------------------------|
| tf          | regularfont     | regularfeatures     |
| it          | italicfont      | italicfeatures      |
| sl          | slantedfont     | slantedfeatures     |
| bf          | boldfont        | boldfeatures        |
| bi          | bolditalicfont  | bolditalicfeatures  |
| bs          | boldslantedfont | boldslantedfeatures |
| sc          | smallcapsfont   | smallcapsfeatures   |
-------------------------------------------------------
The feature-keys expect the name from the \definefontfeature command, 
when you don’t
specify a feature to a certain alternative the value from the 
“features” key is used.
When you want to set a certain font for a alternative there are 
different ways, I’m going
to show the different ways with a few examples where I change the font 
for italic.
Thanks for the descriptions. I have made a small test and turns out the 
"regularfont" has to be assigned to something or the other "xxxfont"s 
won't have any effects.

Here's my code:
=================================================
\definefallbackfamily [mainface] [serif] [adobesongstd]
   [range={0x00400-0x2FA1F}%
   ,regularfont=name:adobesongstdlight%
   ,italicfont=name:adobefangsongstdregular%
   ,boldfont=name:adobeheitistdregular%
   ,bolditalicfont=name:adobekaitistdregular%
   ,force=yes%
   ,features=song%
   ]
=================================================
and if I remove the "regularfont=..." line, the boldface Chinese 
characters will use the Adobe Song Std font as well. Same thing happened 
when I used the "preset=xxx" option which I don't know if it is intended 
to behave like that, by the way.

Oh, and off the topic, can I use "effect" to assign the fonts? Like if I 
have defined
=================================================
\defineeffect[mybold][alternative=both,rulethickness=\dimexpr\bodyfontsize/10\relax]
=================================================
I would like to use this effect to apply to my bold fonts, maybe:
=================================================
\setupfontfamily [serif] [DejaVu Serif] [boldfont=effect:mybold]
=================================================
I know this has nothing to do with this module. I just thought this 
might be interesting.
...
1. Use the filename of a font. With the “file:” prefix you can the 
tell the module
to look for a file with the given name, when the file isn’t found the 
font from
the tf-alternative is used. The file-method is also used when you omit 
the prefix.
\setupfontfamily [serif] [DejaVu Serif] [italicfont=file:dejavuserifbold]
\starttext
Regular and \it Italic
\stoptext
2. Use a certain style. When you use the “style: ”prefix the module 
looks for a certain
style of the requested font.
\setupfontfamily [serif] [DejaVu Serif] [italicfont=style:bolditalic]
\starttext
Regular and \it Italic
\stoptext
3. Search for a font with a certain name. When you use the “name:” 
prefix the module
looks for a font with the requested name. Names are internal values of 
a font which
is sometimes the same as the filename.
\setupfontfamily [serif] [DejaVu Serif] [italicfont=name:dejavuserifbold]
\starttext
Regular and \it Italic
\stoptext
4. Use the spec information. When you use the “spec:” prefix you can 
request a font
with a certain “weight” (bold or normal), “style” (italic or normal) 
and variant (smallcaps or normal).
\setupfontfamily [serif] [DejaVu Serif] [italicfont=spec:bold-italic]
\starttext
Regular and \it Italic
\stoptext
There is a possibility that I change the way to set font and features 
for alternatives
in the feature to a way which is more compact and easier to parse in Lua.
Wolfgang