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?
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