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author | Karl Berry <karl@freefriends.org> | 2021-04-19 21:25:21 +0000 |
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committer | Karl Berry <karl@freefriends.org> | 2021-04-19 21:25:21 +0000 |
commit | 3125499a8c2b497b0f964e23c53d9c9fe3fe4e58 (patch) | |
tree | 1618fa57d975d6d12cde15c8b1190c09061d033c /Master/texmf-dist/tex/luatex/optex/base/fonts-select.opm | |
parent | f5f0b7d1217bc7ab099302a505fffcac39d41006 (diff) |
optex its own format, so directly under tex/ and doc/
git-svn-id: svn://tug.org/texlive/trunk@58918 c570f23f-e606-0410-a88d-b1316a301751
Diffstat (limited to 'Master/texmf-dist/tex/luatex/optex/base/fonts-select.opm')
-rw-r--r-- | Master/texmf-dist/tex/luatex/optex/base/fonts-select.opm | 846 |
1 files changed, 0 insertions, 846 deletions
diff --git a/Master/texmf-dist/tex/luatex/optex/base/fonts-select.opm b/Master/texmf-dist/tex/luatex/optex/base/fonts-select.opm deleted file mode 100644 index 740b311a677..00000000000 --- a/Master/texmf-dist/tex/luatex/optex/base/fonts-select.opm +++ /dev/null @@ -1,846 +0,0 @@ -%% This is part of the OpTeX project, see http://petr.olsak.net/optex - -\_codedecl \fontfam {Fonts selection system <2021-02-25>} % preloaded in format - - \_doc ----------------------------- - \`\initunifonts` macro extends \LuaTeX's font capabalities, - in order to be able to load Unicode fonts. Unfortunately, this part of - \OpTeX/ depends on `luaotfload` package, which adapts Con\TeX/t's generic - font loader for plain \TeX/ and \LaTeX. `luaotfload` uses Lua functions - from \LaTeX's `luatexbase` namespace, we provide our own replacements. - Moreover, `\initunifont` switches with - the \^`\_doresizefont` macro to OTF mode which is represented by the - macro \`\_doresizeunifont`. This mode includes - a fallback to TFM mode if \^`\_fontnamegen` is not defined. - Finally, `\initunifonts` sets itself to relax because we don't want to do - this work twice.\nl - \`\_ttunifont` is default font for `\tt` variant if - `f-lmfonts.opm` (or another font file where `\tt` is declared) is not loaded. - \_cod ----------------------------- - -\_def\_initunifonts {% - \directlua{% - require('luaotfload-main') - luaotfload.main() - }% - \_gdef\_rfskipatX ##1" ##2\_relax{"##1"}% - \_global\_let \_doresizefont=\_doresizeunifont - \_gdef\_tryloadtt {\_fontdef\_tentt{\_let\_fontnamegen=\_ttunifont\_rm}}% - \_global\_let \_initunifonts=\_relax % we need not to do this work twice - \_global\_let \initunifonts=\_relax -} -\_gdef\_doresizeunifont #1{\_logfont{#1}% - \_ifx\_fontnamegen\_undefined \_doresizetfmfont#1\_else - \_font#1={\_fontnamegen} \_sizespec \_relax \_setwsp#1\_relax - \_fi -} -\_def\_ttunifont{[lmmono10-regular]:\_fontfeatures-tlig;} - -\_public \initunifonts ; - - \_doc ----------------------------- - The \`\_famdecl` `[<Family Name>] \<Famselector> {<comment>} {<modifiers>} {<variants>} {<math>}`\nl - `{<font for testing>} {\def`\^`\_fontnamegen``{<data>}}` runs \^`\initunifonts`, then - checks if `\<Famselector>` is defined. If it is true, then closes the file by - `\endinput`. Else it defines `\<Famselector>` and saves it to the - internal `\_f:<currfamily>:main.fam` command. - The macro \`\_initfontfamily` needs it. The \`\_currfamily` is set - to the `<Famselector>` because the following \^`\moddef` commands need to - be in the right font family context. The `\_currfamily` is set to the - `<Famselector>` by the `\<Famselector>` too, because `\<Famselector>` - must set the right font family context. The font family context is given by the current - `\_currfamily` value and by the actual meaning of the \^`\_fontnamegen` macro. - The \`\_mathfaminfo` is saved for usage in the catalog. - \_cod ----------------------------- - -\_def\_famdecl [#1]#2#3#4#5#6#7#8{% - \_initunifonts \_uniaccents - \_unless\_ifcsname _f:\_csstring#2:main.fam\_endcsname - \_isfont{#7}\_iffalse - \_opwarning{Family [#1] skipped, font "#7" not found}\_ea\_ea\_ea\_endinput \_else - \_edef\_currfamily {\_csstring #2}\_def\_mathfaminfo{#6}% - \_wterm {FONT: [#1] -- \_string#2 \_detokenize{(#3)^^J mods:{#4} vars:{#5} math:{#6}}}% - \_unless \_ifx #2\_undefined - \_opwarning{\_string#2 is redefined by \_string\_famdecl\_space[#1]}\_fi - \_protected\_edef#2{\_def\_noexpand\_currfamily{\_csstring #2}\_unexpanded{#8\_resetfam}}% - \_ea \_let \_csname _f:\_currfamily:main.fam\_endcsname =#2% - \_fi - \_else \_csname _f:\_csstring#2:main.fam\_endcsname \_reloading \_rm \_ea \_endinput \_fi -} -\_def\_initfontfamily{% - \_csname _f:\_currfamily:main.fam\_endcsname \_reloading \_rm -} - - \_doc ----------------------------- - \`\_regoptsizes` `<internal-template> <left-output>?<right-output> <resizing-data>` - prepares data for using by the \`\_optname` `<internal-template>` macro. - The data are saved to the `\_oz:<internal-template>` macro. - When the `\_optname` is expanded then the data are scanned by the macro - \`\_optnameA` `<left-output>?<right-output> <mid-output> `\code{<}`<size>` - in the loop.\nl - \`\_optfontalias` `{<template A>}{<template B>}` is defined as - `\let\_oz:<templateA>=\_oz:<templateB>`. - \_cod ----------------------------- - -\_def\_regoptsizes #1 #2?#3 #4*{\_sdef{_oz:#1}{#2?#3 #4* }} -\_def\_optname #1{\_ifcsname _oz:#1\_endcsname - \_ea\_ea\_ea \_optnameA \_csname _oz:#1\_ea\_endcsname - \_else \_failedoptname{#1}\_fi -} -\_def\_failedoptname #1{optname-fails:(#1)} -\_def\_optnameA #1?#2 #3 <#4 {\_ifx*#4#1#3#2\_else - \_ifdim\_optsize<#4pt #1#3#2\_optnameC - \_else \_afterfifi \_optnameA #1?#2 \_fi\_fi -} -\_def\_optnameC #1* {\_fi\_fi} -\_def\_afterfifi #1\_fi\_fi{\_fi\_fi #1} -\_def\_optfontalias #1#2{\_slet{_oz:#1}{_oz:#2}} - - \_doc ----------------------------- - \`\_fvars` `<rm-template> <bf-template> <it-template> <bi-template>` - saves data for usage by the `\_currV` macro. If a template is only dot - then previous template is used (it can be used if the font family doesn't - dispose with all standard variants). - \nl - \`\_currV` expands to a template declared by `\_fvars` depending on the - `<variant name>`. Usable only of standard four variants. Next variants - can be declared by the \^`\famvardef` macro. - \nl - \`\_fsetV` `<key>=<value>,...,<key>=<value>` expands to - `\def\_<key>V{<value>}` in the loop. - \nl - \`\_onlyif` `<key>=<value-a>,<value-b>...,<value-z>: {<what>}` - runs <what> only if the `\_<key>V` is defined as `<value-a>` or - `<value-b>` or ... or `<value-z>`. - \nl - \`\_prepcommalist` `ab,{},cd,\_end,` expands to `ab,,cd,` (auxiliary macro - used in `\_onlyif`). - \_cod ----------------------------- - -\_def\_fvars #1 #2 #3 #4 {% - \_sdef{_fvar:rm}{#1}% - \_sdef{_fvar:bf}{#2}% - \_ifx.#2\_slet{_fvar:bf}{_fvar:rm}\_fi - \_sdef{_fvar:it}{#3}% - \_ifx.#3\_slet{_fvar:it}{_fvar:rm}\_fi - \_sdef{_fvar:bi}{#4}% - \_ifx.#4\_slet{_fvar:bi}{_fvar:it}\_fi -} -\_def\_currV{\_cs{_fvar:\_whatresize}} -\_def\_V{ } -\_def \_fsetV #1 {\_fsetVa #1,=,} -\_def \_fsetVa #1=#2,{\_isempty{#1}\_iffalse - \_ifx,#1\_else\_sdef{_#1V}{#2}\_ea\_ea\_ea\_fsetVa\_fi\_fi -} -\_def \_onlyif #1=#2:#3{% - \_edef\_act{\_noexpand\_isinlist{,\_prepcommalist #2,\_end,}{,\_cs{_#1V},}}\_act - \_iftrue #3\_fi -} -\_def\_prepcommalist#1,{\_ifx\_end#1\_empty\_else #1,\_ea\_prepcommalist\_fi} - - \_doc ----------------------------- - The \`\moddef` `\<modifier> {<data>}` simply speaking does - `\def\<modifier>{<data>}`, but we need to respect - the family context. In fact, `\protected\def\_f:<current family>:<modifier>{<data>}` is - performed and the `\<modifier>` is defined as - \`\_famdepend``\<modifier>{_f:\_currfamily:<modifier>}`. It expands to - `\_f:\_currfamily:<modifier>` value if it is defined or it prints - the warning. When the `\_currfamily` value is - changed then we can declare the same `\<modifier>` with a different meaning. - - When a user declares a prefixed variant of the `\<modifier>` then unprefixed - modifier name is used in internal macros, this is the reason why we are using - the \`\_remifirstunderscore``\_tmp` (where `\_tmp` expands to - `_<something>` or to `<something>`. The `\_remifirstunderscore` - redefines `\_tmp` in the way that it - expands only to `<something>` without the first `_`. - - \`\_setnewmeaning` `<cs-name>=\_tmpa <by-what>` does exactly `\_let <csname>=\_tmpa` - but warning is printed if <cs-name> is defined already and it is not a variant - selector or font modifier. - - \`\_addtomodlist` `<font modifier>` adds given modifier to \`\_modlist` - macro. This list is used after `\resetmod` when a new family is selected by - a family selector, see \`\_resetfam` macro. - This allows reinitializing the same current modifiers in the font context - after the family is changed. - \_cod ----------------------------- - -\_def \_moddef #1#2{\_edef\_tmp{\_csstring#1}% - \_sdef{_f:\_currfamily:\_tmp}{\_addtomodlist#1#2\_reloading}% - \_protected \_edef \_tmpa{\_noexpand\_famdepend\_noexpand#1{_f:\_noexpand\_currfamily:\_tmp}}% - \_setnewmeaning #1=\_tmpa \moddef -} -\_protected \_def\_resetmod {\_cs{_f:\_currfamily:resetmod}} % private variant of \resetmod -\_def \_resetfam{\_def\_addtomodlist##1{}\_resetmod - \_edef \_modlist{\_ea}\_modlist - \_let\_addtomodlist=\_addtomodlistb -} -\_def \_currfamily{} % default current family is empty -\_def \_modlist{} % list of currently used modifiers - -\_def \_addtomodlist#1{\_addto\_modlist#1} -\_let \_addtomodlistb=\_addtomodlist - -\_def\_famdepend#1#2{\_ifcsname#2\_endcsname \_csname#2\_ea\_endcsname \_else - \_ifx\_addtomodlist\_addtomodlistb - \_opwarning{\_string#1 is undeclared in family "\_currfamily", ignored}\_fi\_fi -} -\_def\_setnewmeaning #1=\_tmpa#2{% - \_ifx #1\_undefined \_else \_ifx #1\_tmpa \_else - \_opwarning{\_string#1 is redefined by \_string#2}% - \_fi\_fi - \_let#1=\_tmpa -} -\_public \moddef ; - - \_doc ----------------------------- - The \`\famvardef` `\<XX> {<data>}` - uses analogical trick like \^`\moddef` with - the \^`\_famdepend` macro. The auxiliary - \`\_famvardefA` `\<XX> \_ten<XX> \_tryload<XX> {<data>}` is used. - It does: - \begitems - * `\def \_tryload:<currfam>:<XX> {`\^`\fontdef`` \_ten<XX> {<data>}}` loads font `\_ten<XX>`, - * `\protected\def \<XX> {\_famdepend \<XX> {_f:<currfam>:<XX>}}`, - * `\def \_f:<currfam>:<XX> {\_tryload:<currfam>:<XX>\_ten<XX>}` keeps family dependent definition, - * `\def \_currvar:_ten<XX> {\<XX>}` in order to the \^`\currvar` macro work correctly. - \enditems - `\famvardef\tt` behaves somewhat differently: it doesn't re-define the - `\tt` macro which is defined as `\_tryloadtt \_tentt` in sections~\ref[math-preload] - and~\ref[unimath-codes]. It only re-defines the internal `\_tryloadtt` macro. - \_cod ----------------------------- - -\_def\_famvardef#1{\_edef\_tmp{\_csstring#1}% - \_ea\_famvardefA \_ea#1\_csname _ten\_tmp\_ea\_endcsname - \_csname _tryload:\_currfamily:\_tmp\_endcsname -} -\_def\_famvardefA #1#2#3#4{% #1=\XX #2=\_tenXX #3=\_tryload:currfam:XX #4=data - \_isinlist{.\_rm\_bf\_it\_bi\currvar\_currvar}#1\_iftrue - \_opwarning{\_string\famvardef: - You cannot re-declare standard variant selector \_string#1}% - \_else - \_def#3{\_fontdef#2{#4}}% - \_protected\_edef\_tmpa{\_noexpand\_famdepend\_noexpand#1{_f:\_noexpand\_currfamily:\_tmp}}% - \_ifx #1\_tt \_let\_tryloadtt=#3\_else \_setnewmeaning #1=\_tmpa \famvardef \_fi - \_sdef{_f:\_currfamily:\_tmp}{#3#2}% - \_sdef{_currvar:\_csstring#2}{#1}% - \_fi -} -\_public \famvardef ; - - \_doc ----------------------------- - The \`\fontfam` `[<Font Family>]` does: - \begitems - * Convert its parameter to lower case and without spaces, e.g.\ `<fontfamily>`. - * If the file `f-<fontfamily>.opm` exists read it and finish. - * Try to load user defined `fams-local.opm`. - * If the `<fontfamily>` is declared in `fams-local.opm` or `fams-ini.opm` - read relevant file and finish. - * Print the list of declared families. - \enditems - The `fams-local.opm` is read by the \`\_tryloadfamslocal` macro. It sets - itself to `\_relax` because we need not load this file twice. - The \`\_listfamnames` macro prints registered font families to the - terminal and to the log file. - \_cod ----------------------------- - -\_def\_fontfam[#1]{% - \_lowercase{\_edef\_famname{\_ea\_removespaces #1 {} }}% - \_isfile {f-\_famname.opm}\_iftrue \_opinput {f-\_famname.opm}% - \_else - \_tryloadfamslocal - \_edef\_famfile{\_trycs{_famf:\_famname}{}}% - \_ifx\_famfile\_empty \_listfamnames - \_else \_opinput {\_famfile.opm}% - \_fi\_fi -} -\_def\_tryloadfamslocal{% - \_isfile {fams-local.opm}\_iftrue - \_opinput {fams-local.opm}\_famfrom={}% - \_fi - \_let \_tryloadfamslocal=\_relax % need not to load fams-local.opm twice -} -\_def\_listfamnames {% - \_wterm{===== List of font families ======} - \_begingroup - \_let\_famtext=\_wterm - \_def\_faminfo [##1]##2##3##4{% - \_wterm{ \_space\_noexpand\fontfam [##1] -- ##2}% - \_let\_famalias=\_famaliasA}% - \_opinput {fams-ini.opm}% - \_isfile {fams-local.opm}\_iftrue \_opinput {fams-local.opm}\_fi - \_message{^^J}% - \_endgroup -} -\_def\_famaliasA{\_message{ \_space\_space\_space\_space -- alias:} - \_def\_famalias[##1]{\_message{[##1]}}\_famalias -} -\_public \fontfam ; - - \_doc ----------------------------- - When the `fams-ini.opm` or `fams-local.opm` files are read then we need - to save only a mapping from family names or alias names to the font family file - names. All other information is ignored in this case. But if these files - are read by the `\_listfamnames` macro or when printing a catalog then more - information is used and printed.\nl - \`\_famtext` does nothing or prints the text on the terminal. - \nl - \`\_faminfo` `[<Family Name>] {<comments>} {<file-name>} {<mod-plus-vars>}` - does\nl `\_def \_famf:<familyname> {<file-name>}` or prints information on - the terminal. - \nl - \`\_famalias` `[<Family Alias>]` does `\def \_famf:<familyalias> {<file-name>}` - where `<file-name>` is stored from the previous `\_faminfo` command. Or - prints information on the terminal. - \nl - \`\_famfrom` declares type foundry or owner or designer of the font family. - It can be used in `fams-ini.opm` or `fams-local.opm` and it is printed - in the font catalog. - \_cod ----------------------------- - -\_def\_famtext #1{} -\_def\_faminfo [#1]#2#3#4{% - \_lowercase{\_edef\_tmp{\_ea\_removespaces #1 {} }}% - \_sdef{_famf:\_tmp}{#3}% - \_def\_famfile{#3}% -} -\_def\_famalias [#1]{% - \_lowercase{\_edef\_tmpa{\_ea\_removespaces #1 {} }}% - \_sdef{_famf:\_tmpa\_ea}\_ea{\_famfile}% -} -\_newtoks\_famfrom -\_input fams-ini.opm -\_let\_famfile=\_undefined -\_famfrom={} - - \_doc ----------------------------- - When the \^`\fontfam``[catalog]` is used then the file - `fonts-catalog.opm` is read. The macro \^`\_faminfo` is redefined here - in order to print catalog samples of all declared modifiers/variant - pairs. The user can declare different samples and different behavior of - the catalog, see the end of catalog listing for more information. - The default parameters - \`\catalogsample`, \`\catalogmathsample`, \`\catalogonly` and - \`\catalogexclude` of the catalog are declared here. - \_cod ----------------------------- - -\_newtoks \_catalogsample -\_newtoks \_catalogmathsample -\_newtoks \_catalogonly -\_newtoks \_catalogexclude -\_catalogsample={ABCDabcd Qsty fi fl áéíóúüů řžč ÁÉÍÓÚ ŘŽČ 0123456789} - -\_public \catalogonly \catalogexclude \catalogsample \catalogmathsample ; - - \_doc ----------------------------- - The font features are managed in the \`\_fontfeatures` macro. - They have their implicit values saved in the \`\_defaultfontfeatures` - and the \`\setff` `{<features>}` - can add next font features. If there is the same font feature as the newly - added one then the old value is removed from the `\_fontfeatures` list. - \_cod ----------------------------- - -\_def \_defaultfontfeatures {+tlig;} -\_def \_setff #1{% - \_ifx^#1^\_let \_fontfeatures=\_defaultfontfeatures - \_else \_edef\_fontfeatures{\_fontfeatures #1;}\_fi - \_reloading -} -\_setff {} % default font features: +tlig; -\_def\_removefeature #1{% - \_isinlist\_fontfeatures{#1}\_iftrue - \_def\_tmp ##1#1##2;##3\_relax{\_def\_fontfeatures{##1##3}}% - \_ea \_tmp \_fontfeatures \_relax - \_fi -} -\_public \setff ; - - \_doc ----------------------------- - The \`\setfontcolor` and \`\setletterspace` are macros based on the - special font features provided by \LuaTeX/ (and by \XeTeX/ too but it is not - our business). The \`\setwordspace` recalulates the `\fontdimen2,3,4` - of the font using the \`\setwsp` macro which is used by the - \^`\_doresizeunifont` macro. It activates a dummy font feature `+Ws` too in - order the font is reloded by the `\font` primitive (with independent - `\fontdimen` registers). - \_cod ----------------------------- - -\_def\_savedfontcolor{} -\_def\_savedletterspace{} -\_def\_savedwsp{} - -\_def \_setfontcolor #1{\_removefeature{color=}% - \_edef\_tmp{\_calculatefontcolor{#1}}% - \_ifx\_tmp\_empty \_else \_edef\_fontfeatures{\_fontfeatures color=\_tmp;}\_fi - \_reloading -} -\_def \_setletterspace #1{\_removefeature{letterspace=}% - \_if^#1^\_else \_edef\_fontfeatures{\_fontfeatures letterspace=#1;}\_fi - \_reloading -} -\_def \_setwordspace #1{% - \_if^#1^\_def\_setwsp##1{}\_removefeature{+Ws}% - \_else \_def\_setwsp{\_setwspA{#1}}\_setff{+Ws}\_fi - \_reloading -} -\_def\_setwsp #1{} -\_def\_setwspA #1#2{\_fontdimen2#2=#1\_fontdimen2#2% - \_fontdimen3#2=#1\_fontdimen3#2\_fontdimen4#2=#1\_fontdimen4#2} - -\_def\_calculatefontcolor#1{\_trycs{_fc:#1}{#1}} % you can define more smart macro ... -\_sdef{_fc:red}{FF0000FF} \_sdef{_fc:green}{00FF00FF} \_sdef{_fc:blue}{0000FFFF} -\_sdef{_fc:yellow}{FFFF00FF} \_sdef{_fc:cyan}{00FFFFFF} \_sdef{_fc:magenta}{FF00FFFF} -\_sdef{_fc:white}{FFFFFFFF} \_sdef{_fc:grey}{00000080} \_sdef{_fc:lgrey}{00000025} -\_sdef{_fc:black}{} % ... you can declare more colors... - -\_public \setfontcolor \setletterspace \setwordspace ; - -\_endcode %--------------------------------------------------- - - -\sec[fontsystem] The Font Selection System -%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% - -The basic principles of the Font Selection System used in \OpTeX/ -was documented in the section~\ref[fontfam]. - -\secc Terminology - -We distinguish between -\begitems -* {\em font switchers}, they are declared by the `\font` primitive or by - \^`\fontlet` or \~`\fontdef` macros, they select given font. -* {\em variant selectors}, there are four basic variant selectors - \^`\rm`, \^`\bf`, \^`\it`, \^`\bi`, there is a special selector \^`\currvar`. - More variant selectors can be declared by the \~`\famvardef` macro. - They select the font depending on the given variant and on the {\em font context} - (i.e.\ on current family and on more features given by font modifiers). - In addition, \OpTeX/ defines \~`\tt` as variant selector - independent of chosen font family. It selects typewriter-like font. -* {\em font modifiers} are declared in a family (`\cond`, `\caps`) or are - \"build in" (\^`\setfontsize``{<size spec>}`, \~`\setff{<features>}`). - They do appropriate change in the {\em font context} but do not select - the font. -* {\em family selectors} (for example `\Termes`, `\LMfonts`), - they are declared typically in the {\em font family files}. - They enable to switch between font families, they do appropriate - change in the {\em font context} but do not select - the font. -\enditems - -These commands set their values locally. When the \TeX/ group is -left then the selected font and the {\em font context} are returned back to the values -used when the group was opened. They have the following features: - -The {\em font context} is a set of macro values that will affect the -selection of real font when the variant selector is processed. It includes the -value of {\em current family}, current font size, and -more values stored by font modifiers. - -The {\em family context} is the current family value stored in the font -context. The variant selectors declared by \~`\famvardef` and -font modifiers declared by \~`\moddef` are dependent on the {\em family context}. -They can have the same names but different behavior in different families. - -The fonts registered in \OpTeX/ have their macros in the {\em font family files}, -each family is declared in one font family file with the name `f-famname.opm`. -All families are collected in `fams-ini.opm` and users can give more -declarations in the file `fams-local.opm`. - -\secc Font families, selecting fonts - -The \^`\fontfam` `[<Font Family>]` opens the relevant font family file where -the `<Font Family>` is declared. The family selector is defined here by rules -described in the section~\ref[fontfamfiles]. Font modifiers and variant -selectors may be declared here. -The loaded family is set as current and `\rm` variant selector is processed. - -The available declared font modifiers and declared variant selectors are -listed in the log file when the font family is load. Or you can print -`\fontfam[catalog]` to show available font modifiers and variant selectors. - -The font modifiers can be independent, like `\cond` and `\light`. They can -be arbitrarily combined (in arbitrary order) and if the font family disposes -of all such sub-variants then the desired font is selected (after variant -selector is used). On the other hand, there are font modifiers that negates -the previous font modifier, for example: `\cond`, `\extend`. You can reset -all modifiers to their initial value by the \^`\resetmod` command. - -You can open more font families by more \^`\fontfam` commands. Then the -general method to selecting the individual font is: - -\begtt \catcode`\<=13 -<family selector> <font modifiers> <variant selector> -\endtt -For example: -\begtt -\fontfam [Heros] % Heros family is active here, default \rm variant. -\fontfam [Termes] % Termes family is active here, default \rm variant. -{\Heros \caps \cond \it The caps+condensed italics in Heros family is here.} -The Termes roman is here. -\endtt - -There is one special command \^`\currvar` which acts as a variant selector. -It keeps the current variant and the font of such variant is -reloaded with respect to the current font context by the previously given family -selector and font modifiers. - -You can use the \^`\setfontsize` `{<sizespec>}` command in the same sense as -other font modifiers. It saves information about font size to the font -context. See section~\ref[setfontsize]. Example: - -\begtt -\rm default size \setfontsize{at14pt}\rm here is 14pt size \it italic is -in 14pt size too \bf bold too. -\endtt - -A much more comfortable way to resize fonts is using OPmac-like commands -\~`\typosize` and \~`\typoscale`. -These commands prepare the right sizes for math -fonts too and they re-calculate many internal parameters like `\baselineskip`. -See section~\ref[opmac-fonts] for more information. - - -\secc Math Fonts -%--------------- - -Most font families are connected with a preferred Unicode-math font. This -Unicode-math is activated when the font family is loaded. If you don't prefer -this and you are satisfied with 8bit math CM+AMS fonts preloaded in the -\OpTeX/ format then you can use command \^`\noloadmath` before you load a first -font family. - -If you want to use your specially selected Unicode-math font then use -\^`\loadmath` `{[<font_file>]}` or \^`\loadmath` `{<font_name>}` before first -`\fontfam` is used. - - -\secc[fontcommands] Declaring font commands -%---------------------------- - -Font commands can be font switches, variant selectors, font modifiers, -family selectors and defined font macros doing something with fonts. - -\begitems -* Font switches can be decared by `\font` primitive (see - section~\ref[fontprimitive]) or by \^`\fontlet` command (see - section~\ref[fontlet]) or by \~`\fontdef` command (see - sections~\ref[fontdef2] and~\ref[fontdef]). - When the font switches are used then they select the given font independently - of the current font context. They can be used - in `\output` routine (for example) because we need to set fixed fonts - in headers and footers. -* Variant selectors are \^`\rm`, \^`\bf`, \^`\it`, \^`\bi`, \~`\tt` and \^`\currvar`. More - variant selectors can be declared by \~`\famvardef` command. They select a - font dependent on the current font context, see section~\ref[famvardef]. - The `\tt` selector is documented in section~\ref[tt]. -* Font modifiers are \"build in" or declared by \~`\moddef` command. - They do modifications in the font context but don't select any font. - \begitems - * \"build-in" font modifiers are \^`\setfontsize` (see - section~\ref[setfontsize]), \~`\setff` (see section~\ref[setff]), - \~`\setfontcolor`, \~`\setletterspace` and \~`\setwordspace` - (see section~\ref[specff]). They are independent of font family. - * Font modifiers declared by \~`\moddef` depend on the font family and they - are typically declared in font family files, see - section~\ref[fontfamfiles]. - \enditems -* Family selectors set the given - font family as current and re-set data used by the family-dependent font - modifiers to initial values and to the currently used modifiers. - They are declared in font family files - by \~`\_famdecl` macro, see section~\ref[fontfamfiles]. -* Font macros can be defined arbitrarily by `\def` primitive by users. - See an example in section~\ref[fontmacros]. -\enditems - -All declaration commands mentioned here: `\font`, `\fontlet`, `\fontdef`, `\famvardef`, -`\moddef`, `\_famdecl` and `\def` make local assignment. - -\secc[fontdef2] The `\fontdef` declarator in detail - -The general format for \^`\fontdef` usage is -\begtt \catcode`\<=13 -\fontdef\<font switch> {\<family selector> <font modifiers> \<variant selector>} -\endtt -% -where `\<family selector>` and `<font modifiers>` are optional and -`\<variant selector>` is mandatory. - -The \^`\fontdef` does the following steps. -It pushes the current font context to a stack, it does modifications of the font -context by given `\<family selector>` and/or `<font modifiers>` and it -finds the real font by `\<variant selector>`. This font is not selected but -it is assigned to the declared `\<font switch>` (like `\font` primitive does -it). Finally, `\fontdef` pops the font context stack, so the current -font context is the same as it was before `\fontdef` is used. - -More about `\fontdef` command including examples is written in -section~\ref[fontdef]. - - -\secc[famvardef] The `\famvardef` declarator - -You can declare a new variant selector by the \^`\famvardef` macro. This -macro has similar syntax as \^`\fontdef`: -\begtt \catcode`\<=13 -\famvardef\<new variant selector> {\<family selector> <font modifiers> \<variant selector>} -\endtt -% -where `\<family selector>` and `<font modifiers>` are optional and -`\<variant selector>` is mandatory. -The `\<new variant selector>` should be used in the same sense as `\rm`, -`\bf` etc. It can be used as the final command in next -\^`\fontdef` or \^`\famvardef` declarators -too. When the `\<new variant selector>` is used in the normal text then it does -the following steps: pushes current font context to a stack, modifies font -context by declared `\<family selector>` and/or `<font modifiers>`, -runs following `\<variant selector>`. -This last one selects a real font. Then pops the font context stack. -The new font is selected but the font context has its original values. -This is main difference between `\famvardef\foo{...}` and `\def\foo{...}`. - -Moreover, the \^`\famvardef` creates the `\<new variant selector>` family dependent. -When the selector is used in another family context than it is defined then a warning is -printed on the terminal \"<var selector> is undeclared in the current family" -and nothing happens. But you can declare the same variant selector by -\^`\famvardef` macro in the context of a new family. Then the same command -may do different work depending on the current font family. - -Suppose that the selected font family provides the font modifier `\medium` for -mediate weight of fonts. Then you can declare: -\begtt -\famvardef \mf {\medium\rm} -\famvardef \mi {\medium\it} -\endtt -Now, you can use six independent variant selectors `\rm`, `\bf`, `\it`, -`\bi`, `\mf` and `\mi` in the selected font family. - -A `\<family selector>` can be written before `<font modifiers>` in the -`\famvardef` parameter. Then the `\<new variant selector>` is declared in -the current family but it can use fonts from another family represented by -the `\<family selector>`. - -When you are mixing fonts from more families then you probably run -into a problem with incompatible ex-heights. This problem can be solved using -\^`\setfontsize` and \^`\famvardef` macros: -\begtt -\fontfam[Heros] \fontfam[Termes] - -\def\exhcorr{\setfontsize{mag.88}} -\famvardef\rmsans{\Heros\exhcorr\rm} -\famvardef\itsans{\Heros\exhcorr\it} - -Compare ex-height of Termes \rmsans with Heros \rm and Termes. -\endtt - -The variant selectors (declared by \~`\famvardef`) or font -modifiers (declared by \~`\moddef`) are (typically) control sequences in user name -space (`\mf`, `\caps`). They are most often declared in font family files and -they are loaded by \^`\fontfam`. A conflict with such names in -user namespace can be here. For example: if `\mf` is defined by a user and then -`\fontfam[Roboto]` is used then `\famvardef\mf` is performed for Roboto -family and the original meaning of `\mf` is lost. But \OpTeX/ prints warning -about it. There are two cases: - -\begtt -\def\mf{Metafont} -\fontfam[Roboto] % warning: "The \mf is redefined by \famvardef" is printed - or -\fontfam[Roboto] -\def\mf{Metafont} % \mf variant selector redefined by user, we suppose that \mf - % is used only in the meaning of "Metafont" in the document. -\endtt - -\secc[tt] The `\tt` variant selector - -\^`\tt` is an additional special variant selector which is defined as \"select typewriter -font independently of the current font family". By default, the typewriter font-face -from LatinModern font family is used. - -The \^`\tt` variant selector is used in \OpTeX/ internal macros -\^`\_ttfont` (verbatim texts) and \^`\_urlfont` (printing URL's). - -You can redefine the behavior of `\tt` by \^`\famvardef`. For example: - -\begtt -\fontfam[Cursor] -\fontfam[Heros] -\fontfam[Termes] -\famvardef\tt{\Cursor\setff{-liga;-tlig}\rm} - -Test in Termes: {\tt text}. {\Heros\rm Test in Heros: {\tt text}}. -Test in URL \url{http://something.org}. -\endtt -% -You can see that `\tt` stay family independent. This is a special feature only -for `\tt` selector. New definition is used in \^`\_ttfont` and \^`\_urlfont` too. -It is recommended to use `\setff{-liga;-tlig}` to suppress the -ligatures in typewriter fonts. - -If Unicode math font is loaded then the `\tt` macro selects typewriter -font-face in math mode too. This face -is selected from used Unicode math font and it is independent of -`\famvardef\tt` declaration. - - -\secc[fontmacros] Font commands defined by `\def` - -Such font commands can be used as fonts selectors for titles, footnotes, -citations, etc. Users can define them. - -The following example shows how to define a \"title-font selector". -Titles are not only bigger but they are typically in the bold variant. When a user puts -`{\it...}` into the title text then he/she expects bold italic here, no normal -italic. You can remember the great song by John Lennon \"Let It Be" and -define: - -\begtt -\def\titlefont{\setfontsize{at14pt}\bf \let\it\bi} -... -{\titlefont Title in bold 14pt font and {\it bold 14pt italics} too} -\endtt - -\OpTeX/ defines similar internal commands \^`\_titfont`, \^`\_chapfont`, \^`\_secfont` and -\^`\_seccfont`, see section~\ref[sections]. The commands \^`\typosize` and -\^`\boldify` are used in these macros. They set the math fonts to given size too and they -are defined in section~\ref[opmac-fonts]. - - -\secc[setff] Modifying font features -%---------------------------- - -Each OTF font provides \"font features". You can list these font features -by `otfinfo -f font.otf`. For example, LinLibertine fonts provide `frac` font -feature. If it is active then fractions like 1/2 are printed in a special -form. - -The font features are part of the font context data. -The macro \^`\setff` `{<feature>}` acts like family independent font modifier and -prepares a new <feature>. You must use a variant selector in order to -reinitialize the font with the new font feature. For example -\^`\setff``{+frac}\rm` or \^`\setff``{+frac}`\^`\currvar`. You can declare a new variant -selector too: - -\begtt -\fontfam[LinLibertine] -\famvardef \fraclig {\setff{+frac}\currvar} -Compare 1/2 or 1/10 \fraclig to 1/2 or 1/10. -\endtt - -If the used font does not support the given font feature then the font is reloaded -without warning nor error, silently. The font feature is not activated. - -The `onum` font feature (old-style digits) is connected to `\caps` macro for -Caps+SmallCaps variant in \OpTeX/ font family files. So you need not -create a new modifier, just use `{\caps`\^`\currvar`` 012345}`. - - -\secc[specff] Special font modifiers -%--------------------------- - -Despite the font modifiers declared in the font family file (and dependent on -the font family), we have following font modifiers (independent of font -family): - -\begtt \catcode`\<=13 -\setfontsize{<sizespec>} % sets the font size -\setff{<font feature>} % adds the font feature -\setfontcolor{<color>} % sets font color -\setletterspace{<number>} % sets letter spacing -\setwordspace{<scaling>} % modifies word spacing -\endtt - -The \^`\setfontsize` command is described in the section \ref[setfontsize]. -The \^`\setff` command was described in previous subsection. - -\^`\setfontcolor` `{<color>}` specifies the color and the opacity of the text. -The <color> parameter should be in the hexadecimal format of four bytes -`<red><green><blue><opacity>`, for example `FF0080FF` means full red, zero -green, half blue and full opacity. You can use names `red`, `green`, `blue`, -`yellow`, `cyan`, `magenta`, `white`, `grey`, `lgrey` (without the backslash) -instead of the hexadecimal specification. -The empty parameter `<color>` means default black color. - -These colors of fonts are implemented using \LuaTeX/ internal font feature. This -is different approach than using colors in section \ref[colors]. - -\^`\setletterspace` `{<number>}` specifies the letter spacing of the font. The -`<number>` is a decimal number without unit. The unit is supposed as 1/100 of -the font size. I.e. `2.5` means 0.25 pt when the font is at 10 pt size. The -empty parameter `<number>` means no letter spacing which is the default. - -\^`\setwordspace` `{<scaling>}` scales the default interword space (defined in the -font) and its stretching and shrinking parameters by given `<scaling>` -factor. For example `\setwordspace{2.5}` multiplies interword space by 2.5. - -If you need another font transformations, you can use `\setff` -with following font features provided by Lua\TeX/: - -\begtt -\setff{embolden=1.5}\rm % font is bolder because outline has nonzero width -\setff{slant=0.2}\rm % font is slanted by a linear transformation -\setff{extend=1.2}\rm % font is extended by a linear transformation. -\setff{colr=yes}\rm % if the font includes colored characters, use colors -\setff{upper}\rm % to uppercase (lower=lowecase) conversion at font level -\endtt - -Use font transformations mentioned above and \^`\setletterspace`, -\^`\setwordspace` with care. The best setting of these values is the default -setting in every font, of course. If you really need to set a different -letter spacing then it is strongly recommended to add `\setff{-liga}` -to disable ligatures. And setting a positive letter spacing probably -needs to scale interword spacing too. - -All mentioned font modifiers (except for `\setfontsize`) work only -with Unicode fonts loaded by \^`\fontfam`. - -\secc[fontfamfiles] How to create the font family file -%------------------------------------------------------ - -\printdoctail f-heros.opm - -\printdoctail f-lmfonts.opm - -\secc How to register the font family in the Font Selection System -%--------------------------------------------------------------- - -\printdoctail fams-ini.opm - -\secc[exfont] Notices about extension of `\font` primitive -%--------------------------------------------------------- - -Unicode fonts are loaded by extended `\font` primitive. This extension is -not activated in \OpTeX/ by default, \^`\initunifonts` macro activates it. -You need not use \^`\initunifonts` explicitly if \^`\fontfam` macro is -used because \^`\fontfam` runs it internally. - -The \^`\initunifonts` loads the Lua code from the Luaotfload package which -implements the `\font` primitive extension. See its -documentation `luaotfload-latex.pdf` for information about -all possibilities of extended `\font` primitive. - -The \OpTeX/ format is initialized by `luatex` engine by default but -you can initialize it by `luahbtex` engine too. Then the harfbuzz library is -ready to use for font rendering as an alternative to build-in font renderer -from Luaotfload. The harfbuzz library gives more features for rendering -Indic and Arabic scripts. But it is not used as default, you need to specify -`mode=harf` in the fontfeatures field when `\font` is used. Moreover, when -`mode=harf` is used, then you must specify `script` too. For example - -\begtt -\font\devafont=[NotoSansDevanagari-Regular]:mode=harf;script=dev2 -\endtt -% -If the `luahbtex` engine is not used then `mode=harf` is ignored. See -Luaotfload documentation for more information. - -\endinput - -2021-02-25 \_ttunifont introduced -2021-01-27 lua hack (print function) removed because luaotfload 3.17 removes bug. -2020-12-12 \_modlist added, doc improved -2020-04-18 \_tryloadfamslocal introduced - \_fontdecl -> \_famdecl with different concept -2020-03-18 released |