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authorPhilipp Gesang <phg@phi-gamma.net>2017-02-11 00:21:52 +0100
committerPhilipp Gesang <phg@phi-gamma.net>2017-02-11 00:21:52 +0100
commitad480924393fffa2896156e1a32c22f5c61120dd (patch)
tree45332708058a9f2571d31ef9fb17ec9fc6151ff4 /doc
parent894e27119cba0a294f8e1f5c6e9a70055f4e1ba1 (diff)
downloadluaotfload-ad480924393fffa2896156e1a32c22f5c61120dd.tar.gz
[doc] extend documentation of path lookupsv2.8-fix-2
Diffstat (limited to 'doc')
-rw-r--r--doc/luaotfload-main.tex49
1 files changed, 38 insertions, 11 deletions
diff --git a/doc/luaotfload-main.tex b/doc/luaotfload-main.tex
index b82c8d9..21e001b 100644
--- a/doc/luaotfload-main.tex
+++ b/doc/luaotfload-main.tex
@@ -240,6 +240,7 @@ for a more formal description see figure \ref{font-syntax}.
<name character> ::= {\sc all_characters} - ( `(' | `/' | `:' ) ;
\endsyntaxfloat
+%% Below guarded space gets borked in index; why‽
\beginsubsection{Prefix -- the \identifier{luaotfload}{ }Way}
In \identifier{luaotfload}, the canonical syntax for font requests
@@ -335,13 +336,12 @@ The file names corresponding to the example font names above are
\endsubsection
-\beginsubsection {Compatibility Layer}
-
-In addition to the regular prefixed requests, \identifier{luaotfload}
-accepts loading fonts the \XETEX way.
+\beginsubsection {Bracketed Lookups}
+\label{sec:conf}
+Bracketed lookups allow for arbitrary character content to be used in a
+definition.
%
-There are again two modes: bracketed and unbracketed.
-A bracketed request looks as follows.
+A simple bracketed request looks follows the scheme
\beginnarrower
\nonproportional{\string\font\string\fontname\space = [}%
@@ -350,21 +350,41 @@ A bracketed request looks as follows.
\endnarrower
\noindent
-Inside the square brackets, every character except for a closing
-bracket is permitted, allowing for specifying paths to a font file.
+Inside the square brackets, every character except for a closing bracket is
+permitted, allowing for arbitrary paths to a font file -- including Windows
+style paths with UNC or drive letter prepended -- to be specified.
%
+The \identifier{Luaotfload} syntax differs from \XETEX in that the subfont
+selector goes \emphasis{after} the closing bracket:
+
+\beginnarrower
+ \nonproportional{\string\font\string\fontname\space = [}%
+ \meta{/path/to/file}%
+ \nonproportional{]}
+ \nonproportional{(}n\nonproportional{)}
+\endnarrower
+
Naturally, path-less file names are equally valid and processed the
same way as an ordinary \inlinecode {file:} lookup.
+\beginsubsection {Compatibility}
+
+In addition to the regular prefixed requests, \identifier{luaotfload}
+accepts loading fonts the \XETEX way.
+%
+There are again two modes: bracketed and unbracketed.
+For the bracketed variety, see above, \ref{sec:conf}.
+
+Unbracketed (or, for lack of a better word: \emphasis{anonymous})
+font requests resemble the conventional \TEX syntax.
+
\beginnarrower
\nonproportional{\string\font\string\fontname\space= }%
\meta{font name}
\dots
\endnarrower
+\endsubsection
-Unbracketed (or, for lack of a better word: \emphasis{anonymous})
-font requests resemble the conventional \TEX syntax.
-%
However, they have a broader spectrum of possible interpretations:
before anything else, \identifier{luaotfload} attempts to load a
traditional \TEX Font Metric (\abbrev{tfm} or \abbrev{ofm}).
@@ -443,6 +463,13 @@ name.\footnote{%
\font \cambriamath = "file:cambria.ttc(1)" at 10pt
\endlisting
+and likewise, requesting subfont inside a TTC container by path:
+
+\beginlisting
+ \font \asanamain = "[/home/typesetter/.fonts/math/asana.ttc](0):mode=node;+tlig" at 10pt
+ \font \asanamath = "[/home/typesetter/.fonts/math/asana.ttc](1):mode=base" at 10pt
+\endlisting
+
\endsubsubsection
\beginsubsubsection{Loading by Font Name}