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authorPhilipp Gesang <phg@phi-gamma.net>2017-02-03 21:42:18 +0100
committerGitHub <noreply@github.com>2017-02-03 21:42:18 +0100
commitd0e3bd07b868aefe12a88704bf2dbb35b5da2190 (patch)
treee27cdfa029e7aa9771bf209214a377f71090b85f /src
parent90acbbce3ff2b50929e18cb685961a1168f84075 (diff)
parent7308f84bf07382407df5efe14a7a9e96f0cb5e3a (diff)
downloadluaotfload-d0e3bd07b868aefe12a88704bf2dbb35b5da2190.tar.gz
Merge pull request #403 from phi-gamma/master
first batch of fixes to v2.8 (optical sizes, features)
Diffstat (limited to 'src')
-rw-r--r--src/luaotfload-database.lua85
-rw-r--r--src/luaotfload-features.lua17
-rw-r--r--src/luaotfload-parsers.lua2
3 files changed, 66 insertions, 38 deletions
diff --git a/src/luaotfload-database.lua b/src/luaotfload-database.lua
index 5e4fd7a..950d126 100644
--- a/src/luaotfload-database.lua
+++ b/src/luaotfload-database.lua
@@ -928,7 +928,7 @@ local choose_size = function (sizes, askedsize)
--- exact match, this is what we were looking for
exact = index
goto skip
- elseif askedsize < low then
+ elseif askedsize <= low then
--- below range, add to the norange table
local d = low - askedsize
norange [#norange + 1] = { d, index }
@@ -938,10 +938,19 @@ local choose_size = function (sizes, askedsize)
norange [#norange + 1] = { d, index }
else
--- range match
- local d = ((low + high) / 2) - askedsize
+ local d = 0
+
+ -- should always be true. Just in case there's some
+ -- weried fonts out there
+ if dsnsize > low and dsnsize < high then
+ d = dsnsize - askedsize
+ else
+ d = ((low + high) / 2) - askedsize
+ end
if d < 0 then
d = -d
end
+
inrange [#inrange + 1] = { d, index }
end
end
@@ -1042,26 +1051,54 @@ local lookup_fontname = function (specification, name, style)
return nil, nil
end
-local design_size_dimension
-local set_size_dimension
+local design_size_dimension --- scale asked size if not using bp
+local set_size_dimension --- called from config
do
- --- cf. TeXbook p. 57
+ --- cf. TeXbook p. 57; the index stores sizes pre-scaled from bp to
+ --- sp. This allows requesting sizes we got from the TeX end
+ --- without further conversion. For the other options *pt* and *dd*
+ --- we scale the requested size as though the value in the font was
+ --- specified in the requested unit.
+
+ --- From @zhouyan:
+
+ --- Let P be the asked size in pt, and Aᵤ = CᵤP, where u is the
+ --- designed unit, pt, bp, or dd, and
+ ---
+ --- Cpt = 1, Cbp = 7200/7227, Cdd = 1157/1238.
+ ---
+ --- That is, Aᵤ is the asked size in the desired unit. Let D be the
+ --- de-sign size (assumed to be in the unit of bp) as reported by
+ --- the font (divided by 10; in all the following we ignore the
+ --- factor 2^16 ).
+ ---
+ --- For simplicity, consider only the case of exact match to the
+ --- design size. That is, we would like to have Aᵤ = D. Let A′ᵤ = αᵤP
+ --- and D′ = βD be the scaled values used in comparisons. For the
+ --- comparison to work correctly, we need,
+ ---
+ --- Aᵤ = D ⟺ A′ᵤ = D′ ,
+ ---
+ --- and thus αᵤ = βCᵤ. The fix in PR 400 is the case of β = 1. The
+ --- fix for review is β = 7227/7200, and the value of αᵤ is thus
+ --- correct for pt, bp, but not for dd.
+
local dimens = {
- pt = function (v) return v end,
- bp = function (v) return (v * 7227) / 7200 end,
- dd = function (v) return (v * 1238) / 1157 end,
+ bp = false,
+ pt = 7227 / 7200,
+ dd = (7227 / 7200) * (1157 / 1238),
}
design_size_dimension = dimens.bp
set_size_dimension = function (dim)
- local f = dimens [dim]
- if f then
+ local conv = dimens [dim]
+ if conv ~= nil then
logreport ("both", 4, "db",
"Interpreting design sizes as %q, factor %.6f.",
- dim, f (1.000000))
- design_size_dimension = f
+ dim, conv)
+ design_size_dimension = conv
return
end
logreport ("both", 0, "db",
@@ -1135,7 +1172,10 @@ lookup_font_name = function (specification)
askedsize = 0
end
end
- askedsize = design_size_dimension (askedsize)
+
+ if design_size_dimension ~= false then
+ askedsize = design_size_dimension * askedsize
+ end
resolved, subfont = lookup_familyname (specification,
name,
@@ -1350,9 +1390,16 @@ local load_font_file = function (filename, subfont)
return ret
end
+--- Design sizes in the fonts are specified in decipoints. For the
+--- index these values are prescaled to sp which is what we’re dealing
+--- with at the TeX end.
+
local get_size_info do --- too many upvalues :/
--- rawdata -> (int * int * int | bool)
+ local sp = 2^16 -- pt
+ local bp = 7227 / 7200 -- pt
+
get_size_info = function (rawinfo)
local design_size = rawinfo.design_size
local design_range_top = rawinfo.design_range_top
@@ -1363,13 +1410,13 @@ local get_size_info do --- too many upvalues :/
or design_range_top ~= 0 and design_range_top
if fallback_size then
- design_size = ((design_size or fallback_size) * 2^16) / 10
- design_range_top = ((design_range_top or fallback_size) * 2^16) / 10
- design_range_bottom = ((design_range_bottom or fallback_size) * 2^16) / 10
+ design_size = ((design_size or fallback_size) * sp) / 10
+ design_range_top = ((design_range_top or fallback_size) * sp) / 10
+ design_range_bottom = ((design_range_bottom or fallback_size) * sp) / 10
- design_size = (design_size * 7227) / 7200
- design_range_top = (design_range_top * 7227) / 7200
- design_range_bottom = (design_range_bottom * 7227) / 7200
+ design_size = design_size * bp
+ design_range_top = design_range_top * bp
+ design_range_bottom = design_range_bottom * bp
return {
design_size, design_range_top, design_range_bottom,
diff --git a/src/luaotfload-features.lua b/src/luaotfload-features.lua
index a57aac3..5c35031 100644
--- a/src/luaotfload-features.lua
+++ b/src/luaotfload-features.lua
@@ -1288,10 +1288,6 @@ local tlig_specification = {
data = {
[0x2013] = {0x002D, 0x002D}, -- endash
[0x2014] = {0x002D, 0x002D, 0x002D}, -- emdash
- [0x201C] = {0x2018, 0x2018}, -- quotedblleft
- [0x201D] = {0x2019, 0x2019}, -- quotedblright
- [0x00A1] = {0x0021, 0x2018}, -- exclamdown
- [0x00BF] = {0x003F, 0x2018}, -- questiondown
--- next three originate in T1 encoding; Xetex applies
--- them too
[0x201E] = {0x002C, 0x002C}, -- quotedblbase
@@ -1302,19 +1298,6 @@ local tlig_specification = {
order = { "tlig" },
prepend = true,
},
- {
- type = "ligature",
- features = everywhere,
- data = {
- [0x201C] = {0x0060, 0x0060}, -- quotedblleft
- [0x201D] = {0x0027, 0x0027}, -- quotedblright
- [0x00A1] = {0x0021, 0x0060}, -- exclamdown
- [0x00BF] = {0x003F, 0x0060}, -- questiondown
- },
- flags = noflags,
- order = { "tlig" },
- prepend = true,
- },
}
local rot13_specification = {
diff --git a/src/luaotfload-parsers.lua b/src/luaotfload-parsers.lua
index ffb6401..c2b4f2e 100644
--- a/src/luaotfload-parsers.lua
+++ b/src/luaotfload-parsers.lua
@@ -615,9 +615,7 @@ local prefixed = P"name:" * ws * Cg(fontname, "name")
--- we’ll emit a warning.
+ P"file:" * ws * Cg(unsupported, "path")
+ P"file:" * ws * Cg(fontname, "file")
---- EXPERIMENTAL: kpse lookup
+ P"kpse:" * ws * Cg(fontname, "kpse")
---- EXPERIMENTAL: custom lookup
+ P"my:" * ws * Cg(fontname, "my")
local unprefixed = Cg(fontname, "anon")
local path_lookup = lbrk * Cg(C((1-rbrk)^1), "path") * rbrk