On 5/9/2018 3:02 AM, Henri Menke wrote:
Dear list,
this is a follow-up on Ulrike's post, so I'm just hijacking the thread.
How can I use the Lua fonts in Plain? It works fine if I just remove
ConTeXt-specific actualtext bits but as soon as I add features to the
font, the name resolution fails with something like
! Font
\mainfont=file:fonts-demo-rule.lua:original=file:texgyrepagella-regular.
otf not loadable: metric data not found or bad.
MWE is below as always.
(1) This lua font stuff was mostly written for demonstration purposes so
anything done like should really use the mechanisms available in the
macro package used
(2) If you use plain and want to play with the font interface you can
better use the plain code that comes with context because that is what I
can run here (this plain version has always been present btw).
(3) Examples coming from the font manual can use feaures only present in
context (for instance because it uses other code present in context or
because i didn't bother to make in generic).
(4) File lookup is macro package specific.
So, say that you have:
\font\mainfont="file:fonts-demo-rule.lua":original=texgyrepagellaregular;
\mainfont
This code is stored in fonts-demo-rule.lua and we can load that font in
the usual way, by specifying a filename.
\bye
and then in that lua file
if detail then
name = name .. ":" .. detail
end
watch how i replaced the * by : because only context has the * syntax
while you use/want the xetex syntax
mtxrun --script plain yourtexfile
should work gven that you made a format with
mtxrun --script plain --make
(mtxrun --script font --reload --simple will make a plain database if
needed)
It uses luatex-plain that ships with context as format (there's also a
luatex-test file that shows some font stuff).
Fwiw, the latest version also supports font effects at the font level
but one needs luatex 1.08 (which is the current garden version).
Cheers, Henri
----------- test.tex -----------
\input luaotfload.sty
\font\mainfont="file:fonts-demo-rule.lua":original=file:texgyrepagella-regular.otf
\mainfont
This code is stored in fonts-demo-rule.lua and we can load that font in
the usual way,
by specifying a filename.
\bye
----------- fonts-demo-rule.lua -----------
return function(specification)
local features = specification.features.normal
local name = features.original or "dejavu-serif"
local option = features.option -- we only support "line"
local size = specification.size -- always set
local detail = specification.detail -- e.g. default
if detail then
name = name .. "*" .. detail
end
local f, id = fonts.constructors.readanddefine(name,size)
if f then
f.properties.name = specification.name
f.properties.virtualized = true
f.fonts = {
{ id = id },
}
for s in string.gmatch("aeuioy",".") do
local n = utf.byte(s)
local c = f.characters[n]
if c then
local w = c.width or 0
local h = c.height or 0
local d = c.depth or 0
if option == "line" then
f.characters[n].commands = {
{ "rule", option == "line" and size/10, w },
}
else
f.characters[n].commands = {
{ "down", d },
{ "rule", h + d, w },
}
end
else
-- probably a real bad font
end
end
end
return f
end
On 04/05/18 06:26, Ulrike Fischer wrote:
I'm trying to run one of the examples of fonts-mkiv.pdf
I copied the code from 4.5 Lua fonts to a file
"fonts-demo-rule.lua". This lua file is in the same directory as my
test file.
Then I tried
\definefont
[MyRuleFont]
[file:fonts-demo-rule.lua*default sa 1]
\starttext
{\MyRuleFont So when we use it we get text }
\stoptext
but I get in the log
fonts > defining > forced type 'lua' of 'fonts-demo-rule' not found
fonts > defining > font with asked name 'fonts-demo-rule' is not
found using lookup 'file'
fonts > defining > unknown font 'fonts-demo-rule', loading aborted
fonts > defining > unable to define 'fonts-demo-rule.lua' as
'MyRuleFont--0'
The file itself is found (I can see its path later on). What is
going on here?
___________________________________________________________________________________
If your question is of interest to others as well, please add an entry
to the Wiki!
maillist : ntg-context@ntg.nl /
http://www.ntg.nl/mailman/listinfo/ntg-context
webpage : http://www.pragma-ade.nl / http://context.aanhet.net
archive : https://bitbucket.org/phg/context-mirror/commits/
wiki : http://contextgarden.net
___________________________________________________________________________________
--
-----------------------------------------------------------------
Hans Hagen | PRAGMA ADE
Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
tel: 038 477 53 69 | www.pragma-ade.nl | www.pragma-pod.nl
-----------------------------------------------------------------
___________________________________________________________________________________
If your question is of interest to others as well, please add an entry to the
Wiki!
maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
webpage : http://www.pragma-ade.nl / http://context.aanhet.net
archive : https://bitbucket.org/phg/context-mirror/commits/
wiki : http://contextgarden.net
___________________________________________________________________________________
