diff options
| -rw-r--r-- | luaotfload-auxiliary.lua | 117 | ||||
| -rw-r--r-- | tests/font_patch.tex | 6 | ||||
| -rw-r--r-- | tests/pln-aux-1.tex | 45 |
3 files changed, 167 insertions, 1 deletions
diff --git a/luaotfload-auxiliary.lua b/luaotfload-auxiliary.lua new file mode 100644 index 0000000..1f0c79c --- /dev/null +++ b/luaotfload-auxiliary.lua @@ -0,0 +1,117 @@ +#!/usr/bin/env texlua +----------------------------------------------------------------------- +-- FILE: luaotfload-auxiliary.lua +-- DESCRIPTION: part of luaotfload +-- REQUIREMENTS: luaotfload 2.2 +-- AUTHOR: Philipp Gesang (Phg), <phg42.2a@gmail.com> +-- VERSION: 1.0 +-- CREATED: 2013-05-01 14:40:50+0200 +----------------------------------------------------------------------- +-- + +--- this file addresses issue #24 +--- https://github.com/lualatex/luaotfload/issues/24# + +luaotfload = luaotfload or {} +luaotfload.aux = luaotfload.aux or { } + +config = config or { } +config.luaotfload = config.luaotfload or { } + +local utf8 = unicode.utf8 + +local aux = luaotfload.aux + +----------------------------------------------------------------------- +--- font patches +----------------------------------------------------------------------- + +--[[doc-- +This sets two dimensions apparently relied upon by the unicode-math +package. +--doc]]-- + +local set_sscale_dimens = function (fontdata) + local mathconstants = fontdata.MathConstants + local parameters = fontdata.parameters + if mathconstants then + parameters[10] = mathconstants.ScriptPercentScaleDown or 70 + parameters[11] = mathconstants.ScriptScriptPercentScaleDown or 50 + end + return fontdata +end + +luatexbase.add_to_callback( + "luaotfload.patch_font", + set_sscale_dimens, + "luaotfload.aux.set_sscale_dimens") + +--- fontobj -> int +local lookup_units = function (fontdata) + local metadata = fontdata.shared and fontdata.shared.rawdata.metadata + if metadata and metadata.units_per_em then + return metadata.units_per_em + elseif fontdata.parameters and fontdata.parameters.units then + return fontdata.parameters.units + elseif fontdata.units then --- v1.x + return fontdata.units + end + return 1000 +end + +--[[doc-- +This callback corrects some values of the Cambria font. +--doc]]-- +local patch_cambria_domh = function (fontdata) + local mathconstants = fontdata.MathConstants + if mathconstants and fontdata.psname == "CambriaMath" then + --- my test Cambria has 2048 + local units_per_em = fontdata.units_per_em or lookup_units(fontdata) + local sz = fontdata.parameters.size or fontdata.size + local mh = 2800 / units_per_em * sz + if mathconstants.DisplayOperatorMinHeight < mh then + mathconstants.DisplayOperatorMinHeight = mh + end + end +end + +luatexbase.add_to_callback( + "luaotfload.patch_font", + patch_cambria_domh, + "luaotfload.aux.patch_cambria_domh") + +----------------------------------------------------------------------- +--- fonts +----------------------------------------------------------------------- + +--- int -> int -> bool +local font_has_glyph = function (font_id, codepoint) + local fontdata = fonts.hashes.identifiers[font_id] + if fontdata then + if fontdata.characters[codepoint] ~= nil then return true end + end + return false +end + +aux.font_has_glyph = font_has_glyph + +--- int -> bool +local current_font_has_glyph = function (codepoint) + return font_has_glyph (font.current(), codepoint) +end + +aux.current_font_has_glyph = current_font_has_glyph + +local do_if_glyph_else = function (chr, positive, negative) + local codepoint = tonumber(chr) + if not codepoint then codepoint = utf8.byte(chr) end + if current_font_has_glyph(codepoint) then + tex.sprint(positive) + else + tex.sprint(negative) + end +end + +aux.do_if_glyph_else = do_if_glyph_else + +-- vim:tw=71:sw=2:ts=2:expandtab diff --git a/tests/font_patch.tex b/tests/font_patch.tex index d41ff48..d3bba07 100644 --- a/tests/font_patch.tex +++ b/tests/font_patch.tex @@ -8,7 +8,11 @@ mc.DisplayOperatorMinHeight = 2800 / em * sz end end - luatexbase.add_to_callback("luaotfload.patch_font", patch, "cambria.domh") + %% part of luaotfload-auxiliary + %luatexbase.add_to_callback( + %"luaotfload.patch_font", + %patch, + %"luaotfload.aux.patch_cambria_domh") } \font\4={name:Cambria Math:mode=base;script=math} at 10pt diff --git a/tests/pln-aux-1.tex b/tests/pln-aux-1.tex new file mode 100644 index 0000000..f33ef21 --- /dev/null +++ b/tests/pln-aux-1.tex @@ -0,0 +1,45 @@ +\input luaotfload.sty +\baselineskip=17.28pt + +\font\iwonaregular=name:iwona at 14.4pt +\font\lmromanten=file:lmroman10-regular.otf at 14.4pt +\font\cmuregular=file:cmunrm.otf at 14.4pt + +%% wrap tests in macros (could move to style file) +\def\doifglyphelse#1#2#3{% + \directlua{ + luaotfload.aux.do_if_glyph_else([[#1]], [[#2]], [[#3]]) + }% +} + +\def\doifglyph#1#2{\doifglyphelse{#1}{#2}{}} + +%% no otf font loaded yet, so both fail: +first: +\doifglyphelse{a}{true}{false} +\doifglyph {a}{yep} + +%% load lm and try repeat: +\lmromanten +second: +\doifglyphelse{a}{true}{false} +\doifglyph {a}{yep} + +%% let’s test some more free fonts +\def\checkglyphset{% + \doifglyphelse ö{ö}{nope} + \doifglyphelse п{п}{nope} + \doifglyphelse α{α}{nope} + \doifglyphelse Æ{Æ}{nope} + \doifglyphelse ą{ą}{nope} + \doifglyphelse ř{ř}{nope} + \doifglyphelse ˝{˝}{nope} + \doifglyphelse ѩ{ѩ}{nope} + \endgraf +} + +\iwonaregular \checkglyphset +\lmromanten \checkglyphset +\cmuregular \checkglyphset + +\bye |