if not modules then modules = { } end modules ['font-con'] = {
version = 1.001,
comment = "companion to font-ini.mkiv",
author = "Hans Hagen, PRAGMA-ADE, Hasselt NL",
copyright = "PRAGMA ADE / ConTeXt Development Team",
license = "see context related readme files"
}
local utf = unicode.utf8
local next, tostring, rawget = next, tostring, rawget
local format, match, lower, gsub = string.format, string.match, string.lower, string.gsub
local utfbyte = utf.byte
local sort, insert, concat, sortedkeys, serialize, fastcopy = table.sort, table.insert, table.concat, table.sortedkeys, table.serialize, table.fastcopy
local derivetable = table.derive
local trace_defining = false trackers.register("fonts.defining", function(v) trace_defining = v end)
local trace_scaling = false trackers.register("fonts.scaling" , function(v) trace_scaling = v end)
local report_defining = logs.reporter("fonts","defining")
-- watch out: no negative depths and negative eights permitted in regular fonts
--[[ldx--
Here we only implement a few helper functions.
--ldx]]--
local fonts = fonts
local constructors = { }
fonts.constructors = constructors
local handlers = { }
fonts.handlers = handlers
local specifiers = fonts.specifiers
local contextsetups = specifiers.contextsetups
local contextnumbers = specifiers.contextnumbers
local allocate = utilities.storage.allocate
local setmetatableindex = table.setmetatableindex
-- will be directives
constructors.dontembed = allocate()
constructors.mathactions = { }
constructors.autocleanup = true
constructors.namemode = "fullpath" -- will be a function
constructors.version = 1.01
constructors.cache = containers.define("fonts", "constructors", constructors.version, false)
constructors.privateoffset = 0xF0000 -- 0x10FFFF
-- This might become an interface;
local designsizes = allocate()
constructors.designsizes = designsizes
local loadedfonts = allocate()
constructors.loadedfonts = loadedfonts
--[[ldx--
We need to normalize the scale factor (in scaled points). This has to
do with the fact that uses a negative multiple of 1000 as
a signal for a font scaled based on the design size.
--ldx]]--
local factors = {
pt = 65536.0,
bp = 65781.8,
}
function constructors.setfactor(f)
constructors.factor = factors[f or 'pt'] or factors.pt
end
constructors.setfactor()
function constructors.scaled(scaledpoints, designsize) -- handles designsize in sp as well
if scaledpoints < 0 then
if designsize then
local factor = constructors.factor
if designsize > factor then -- or just 1000 / when? mp?
return (- scaledpoints/1000) * designsize -- sp's
else
return (- scaledpoints/1000) * designsize * factor
end
else
return (- scaledpoints/1000) * 10 * factor
end
else
return scaledpoints
end
end
--[[ldx--
Beware, the boundingbox is passed as reference so we may not overwrite it
in the process; numbers are of course copies. Here 65536 equals 1pt. (Due to
excessive memory usage in CJK fonts, we no longer pass the boundingbox.)
--ldx]]--
-- The scaler is only used for otf and afm and virtual fonts. If
-- a virtual font has italic correction make sure to set the
-- italic_correction flag. Some more flags will be added in
-- the future.
--[[ldx--
The reason why the scaler was originally split, is that for a while we experimented
with a helper function. However, in practice the calls are too slow to
make this profitable and the based variant was just faster. A days
wasted day but an experience richer.
--ldx]]--
-- we can get rid of the tfm instance when we have fast access to the
-- scaled character dimensions at the tex end, e.g. a fontobject.width
-- actually we already have soem of that now as virtual keys in glyphs
--
-- flushing the kern and ligature tables from memory saves a lot (only
-- base mode) but it complicates vf building where the new characters
-- demand this data .. solution: functions that access them
function constructors.cleanuptable(tfmdata)
if constructors.autocleanup and tfmdata.properties.virtualized then
for k, v in next, tfmdata.characters do
if v.commands then v.commands = nil end
-- if v.kerns then v.kerns = nil end
end
end
end
-- experimental, sharing kerns (unscaled and scaled) saves memory
-- local sharedkerns, basekerns = constructors.check_base_kerns(tfmdata)
-- loop over descriptions (afm and otf have descriptions, tfm not)
-- there is no need (yet) to assign a value to chr.tonunicode
-- constructors.prepare_base_kerns(tfmdata) -- optimalization
-- we have target.name=metricfile and target.fullname=RealName and target.filename=diskfilename
-- when collapsing fonts, luatex looks as both target.name and target.fullname as ttc files
-- can have multiple subfonts
function constructors.calculatescale(tfmdata,scaledpoints)
local parameters = tfmdata.parameters
if scaledpoints < 0 then
scaledpoints = (- scaledpoints/1000) * (tfmdata.designsize or parameters.designsize) -- already in sp
end
return scaledpoints, scaledpoints / (parameters.units or 1000) -- delta
end
local unscaled = {
ScriptPercentScaleDown = true,
ScriptScriptPercentScaleDown = true,
RadicalDegreeBottomRaisePercent = true
}
function constructors.assignmathparameters(target,original) -- simple variant, not used in context
-- when a tfm file is loaded, it has already been scaled
-- and it never enters the scaled so this is otf only and
-- even then we do some extra in the context math plugins
local mathparameters = original.mathparameters
if mathparameters and next(mathparameters) then
local targetparameters = target.parameters
local targetproperties = target.properties
local targetmathparameters = { }
local factor = targetproperties.math_is_scaled and 1 or targetparameters.factor
for name, value in next, mathparameters do
if unscaled[name] then
targetmathparameters[name] = value
else
targetmathparameters[name] = value * factor
end
end
if not targetmathparameters.FractionDelimiterSize then
targetmathparameters.FractionDelimiterSize = 1.01 * targetparameters.size
end
if not mathparameters.FractionDelimiterDisplayStyleSize then
targetmathparameters.FractionDelimiterDisplayStyleSize = 2.40 * targetparameters.size
end
target.mathparameters = targetmathparameters
end
end
function constructors.scale(tfmdata,specification)
local target = { } -- the new table
--
if tonumber(specification) then
specification = { size = specification }
end
--
local scaledpoints = specification.size
local relativeid = specification.relativeid
--
local properties = tfmdata.properties or { }
local goodies = tfmdata.goodies or { }
local resources = tfmdata.resources or { }
local descriptions = tfmdata.descriptions or { } -- bad news if empty
local characters = tfmdata.characters or { } -- bad news if empty
local changed = tfmdata.changed or { } -- for base mode
local shared = tfmdata.shared or { }
local parameters = tfmdata.parameters or { }
local mathparameters = tfmdata.mathparameters or { }
--
local targetcharacters = { }
local targetdescriptions = derivetable(descriptions)
local targetparameters = derivetable(parameters)
local targetproperties = derivetable(properties)
local targetgoodies = goodies -- we need to loop so no metatable
target.characters = targetcharacters
target.descriptions = targetdescriptions
target.parameters = targetparameters
-- target.mathparameters = targetmathparameters -- happens elsewhere
target.properties = targetproperties
target.goodies = targetgoodies
target.shared = shared
target.resources = resources
target.unscaled = tfmdata -- the original unscaled one
--
-- specification.mathsize : 1=text 2=script 3=scriptscript
-- specification.textsize : natural (text)size
-- parameters.mathsize : 1=text 2=script 3=scriptscript >1000 enforced size (feature value other than yes)
--
local mathsize = tonumber(specification.mathsize) or 0
local textsize = tonumber(specification.textsize) or scaledpoints
local forcedsize = tonumber(parameters.mathsize ) or 0
local extrafactor = tonumber(specification.factor ) or 1
if (mathsize == 2 or forcedsize == 2) and parameters.scriptpercentage then
scaledpoints = parameters.scriptpercentage * textsize / 100
elseif (mathsize == 3 or forcedsize == 3) and parameters.scriptscriptpercentage then
scaledpoints = parameters.scriptscriptpercentage * textsize / 100
elseif forcedsize > 1000 then -- safeguard
scaledpoints = forcedsize
end
--
local tounicode = resources.tounicode
local defaultwidth = resources.defaultwidth or 0
local defaultheight = resources.defaultheight or 0
local defaultdepth = resources.defaultdepth or 0
local units = parameters.units or 1000
--
if target.fonts then
target.fonts = fastcopy(target.fonts) -- maybe we virtualize more afterwards
end
--
-- boundary keys are no longer needed as we now have a string 'right_boundary'
-- that can be used in relevant tables (kerns and ligatures) ... not that I ever
-- used them
--
-- boundarychar_label = 0, -- not needed
-- boundarychar = 65536, -- there is now a string 'right_boundary'
-- false_boundarychar = 65536, -- produces invalid tfm in luatex
--
targetproperties.language = properties.language or "dflt" -- inherited
targetproperties.script = properties.script or "dflt" -- inherited
targetproperties.mode = properties.mode or "base" -- inherited
--
local askedscaledpoints = scaledpoints
local scaledpoints, delta = constructors.calculatescale(tfmdata,scaledpoints) -- no shortcut, dan be redefined
--
local hdelta = delta
local vdelta = delta
--
target.designsize = parameters.designsize -- not really needed so it muight become obsolete
target.units_per_em = units -- just a trigger for the backend (does luatex use this? if not it will go)
--
local direction = properties.direction or tfmdata.direction or 0 -- pointless, as we don't use omf fonts at all
target.direction = direction
properties.direction = direction
--
target.size = scaledpoints
--
target.encodingbytes = properties.encodingbytes or 1
target.embedding = properties.embedding or "subset"
target.tounicode = 1
target.cidinfo = properties.cidinfo
target.format = properties.format
--
local fontname = properties.fontname or tfmdata.fontname -- for the moment we fall back on
local fullname = properties.fullname or tfmdata.fullname -- names in the tfmdata although
local filename = properties.filename or tfmdata.filename -- that is not the right place to
local psname = properties.psname or tfmdata.psname -- pass them
local name = properties.name or tfmdata.name
--
if not psname or psname == "" then
-- name used in pdf file as well as for selecting subfont in ttc/dfont
psname = fontname or (fullname and fonts.names.cleanname(fullname))
end
target.fontname = fontname
target.fullname = fullname
target.filename = filename
target.psname = psname
target.name = name
--
properties.fontname = fontname
properties.fullname = fullname
properties.filename = filename
properties.psname = psname
properties.name = name
-- expansion (hz)
local expansion = parameters.expansion
if expansion then
target.stretch = expansion.stretch
target.shrink = expansion.shrink
target.step = expansion.step
target.auto_expand = expansion.auto
end
-- protrusion
local protrusion = parameters.protrusion
if protrusion then
target.auto_protrude = protrusion.auto
end
-- widening
local extend_factor = parameters.extend_factor or 0
if extend_factor ~= 0 and extend_factor ~= 1 then
hdelta = hdelta * extend_factor
target.extend = extend_factor * 1000 -- extent ?
else
target.extend = 1000 -- extent ?
end
-- slanting
local slant_factor = parameters.slant_factor or 0
if slant_factor ~= 0 then
target.slant = slant_factor * 1000
else
target.slant = 0
end
--
targetparameters.factor = delta
targetparameters.hfactor = hdelta
targetparameters.vfactor = vdelta
targetparameters.size = scaledpoints
targetparameters.units = units
targetparameters.scaledpoints = askedscaledpoints
--
local isvirtual = properties.virtualized or tfmdata.type == "virtual"
local hasquality = target.auto_expand or target.auto_protrude
local hasitalic = properties.italic_correction
local autoitalic = properties.auto_italic_correction
local stackmath = not properties.no_stackmath
local nonames = properties.noglyphnames
local nodemode = properties.mode == "node"
--
if changed and not next(changed) then
changed = false
end
--
target.type = isvirtual and "virtual" or "real"
-- this will move to some subtable so that it is copied at once
target.postprocessors = tfmdata.postprocessors
--
local targetslant = (parameters.slant or parameters[1] or 0)
local targetspace = (parameters.space or parameters[2] or 0)*hdelta
local targetspace_stretch = (parameters.space_stretch or parameters[3] or 0)*hdelta
local targetspace_shrink = (parameters.space_shrink or parameters[4] or 0)*hdelta
local targetx_height = (parameters.x_height or parameters[5] or 0)*vdelta
local targetquad = (parameters.quad or parameters[6] or 0)*hdelta
local targetextra_space = (parameters.extra_space or parameters[7] or 0)*hdelta
--
targetparameters.slant = targetslant
targetparameters.space = targetspace
targetparameters.space_stretch = targetspace_stretch
targetparameters.space_shrink = targetspace_shrink
targetparameters.x_height = targetx_height
targetparameters.quad = targetquad
targetparameters.extra_space = targetextra_space
--
local ascender = parameters.ascender
if ascender then
targetparameters.ascender = delta * ascender
end
local descender = parameters.descender
if descender then
targetparameters.descender = delta * descender
end
-- copies, might disappear
targetparameters.xheight = targetparameters.xheight or targetparameters.x_height or parameters.x_height
targetparameters.extraspace = targetparameters.extraspace or targetparameters.extra_space or parameters.extra_space
targetparameters.spacestretch = targetparameters.spacestretch or targetparameters.space_stretch or parameters.space_stretch
targetparameters.spaceshrink = targetparameters.spaceshrink or targetparameters.space_shrink or parameters.space_shrink
--
local protrusionfactor = (targetquad ~= 0 and 1000/targetquad) or 0
local scaledwidth = defaultwidth * hdelta
local scaledheight = defaultheight * vdelta
local scaleddepth = defaultdepth * vdelta
--
if trace_defining then
report_defining("scaling by (%s,%s): name '%s', fullname: '%s', filename: '%s'",
hdelta,vdelta,name or "noname",fullname or "nofullname",filename or "nofilename")
end
--
local hasmath = (properties.has_math or next(mathparameters)) and true
if hasmath then
if trace_defining then
report_defining("math enabled for: name '%s', fullname: '%s', filename: '%s'",
name or "noname",fullname or "nofullname",filename or "nofilename")
end
constructors.assignmathparameters(target,tfmdata) -- does scaling and whatever is needed
properties.has_math = true
target.nomath = false
target.MathConstants = target.mathparameters
else
if trace_defining then
report_defining("math disabled for: name '%s', fullname: '%s', filename: '%s'",
name or "noname",fullname or "nofullname",filename or "nofilename")
end
properties.has_math = false
target.nomath = true
target.mathparameters = nil -- nop
end
--
local sharedkerns = { }
--
for unicode, character in next, characters do
local chr, description, index, touni
if changed then
-- basemode hack (we try to catch missing tounicodes, e.g. needed for ssty in math cambria)
local c = changed[unicode]
if c then
description = descriptions[c] or descriptions[unicode] or character
character = characters[c] or character
index = description.index or c
if tounicode then
touni = tounicode[index] -- nb: index!
if not touni then -- goodie
local d = descriptions[unicode] or characters[unicode]
local i = d.index or unicode
touni = tounicode[i] -- nb: index!
end
end
else
description = descriptions[unicode] or character
index = description.index or unicode
if tounicode then
touni = tounicode[index] -- nb: index!
end
end
else
description = descriptions[unicode] or character
index = description.index or unicode
if tounicode then
touni = tounicode[index] -- nb: index!
end
end
local width = description.width
local height = description.height
local depth = description.depth
if width then width = hdelta*width else width = scaledwidth end
if height then height = vdelta*height else height = scaledheight end
-- if depth then depth = vdelta*depth else depth = scaleddepth end
if depth and depth ~= 0 then
depth = delta*depth
if nonames then
chr = {
index = index,
height = height,
depth = depth,
width = width,
}
else
chr = {
name = description.name,
index = index,
height = height,
depth = depth,
width = width,
}
end
else
-- this saves a little bit of memory time and memory, esp for big cjk fonts
if nonames then
chr = {
index = index,
height = height,
width = width,
}
else
chr = {
name = description.name,
index = index,
height = height,
width = width,
}
end
end
if touni then
chr.tounicode = touni
end
-- if trace_scaling then
-- report_defining("t=%s, u=%s, i=%s, n=%s c=%s",k,chr.tounicode or "",index or 0,description.name or '-',description.class or '-')
-- end
if hasquality then
-- we could move these calculations elsewhere (saves calculations)
local ve = character.expansion_factor
if ve then
chr.expansion_factor = ve*1000 -- expansionfactor, hm, can happen elsewhere
end
local vl = character.left_protruding
if vl then
chr.left_protruding = protrusionfactor*width*vl
end
local vr = character.right_protruding
if vr then
chr.right_protruding = protrusionfactor*width*vr
end
end
-- todo: hasitalic
if autoitalic then
local vi = description.italic or (description.boundingbox[3] - description.width + autoitalic)
if vi and vi ~= 0 then
chr.italic = vi*hdelta
end
elseif hasitalic then
local vi = description.italic or character.italic -- why character
if vi and vi ~= 0 then
chr.italic = vi*hdelta
end
end
-- to be tested
if hasmath then
-- todo, just operate on descriptions.math
local vn = character.next
if vn then
chr.next = vn
-- if character.vert_variants or character.horiz_variants then
-- report_defining("glyph U+%05X has combination of next, vert_variants and horiz_variants",index)
-- end
else
local vv = character.vert_variants
if vv then
local t = { }
for i=1,#vv do
local vvi = vv[i]
t[i] = {
["start"] = (vvi["start"] or 0)*vdelta,
["end"] = (vvi["end"] or 0)*vdelta,
["advance"] = (vvi["advance"] or 0)*vdelta,
["extender"] = vvi["extender"],
["glyph"] = vvi["glyph"],
}
end
chr.vert_variants = t
else
local hv = character.horiz_variants
if hv then
local t = { }
for i=1,#hv do
local hvi = hv[i]
t[i] = {
["start"] = (hvi["start"] or 0)*hdelta,
["end"] = (hvi["end"] or 0)*hdelta,
["advance"] = (hvi["advance"] or 0)*hdelta,
["extender"] = hvi["extender"],
["glyph"] = hvi["glyph"],
}
end
chr.horiz_variants = t
end
end
end
local va = character.top_accent
if va then
chr.top_accent = vdelta*va
end
if stackmath then
local mk = character.mathkerns -- not in math ?
if mk then
local kerns = { }
local v = mk.top_right if v then local k = { } for i=1,#v do local vi = v[i]
k[i] = { height = vdelta*vi.height, kern = vdelta*vi.kern }
end kerns.top_right = k end
local v = mk.top_left if v then local k = { } for i=1,#v do local vi = v[i]
k[i] = { height = vdelta*vi.height, kern = vdelta*vi.kern }
end kerns.top_left = k end
local v = mk.bottom_left if v then local k = { } for i=1,#v do local vi = v[i]
k[i] = { height = vdelta*vi.height, kern = vdelta*vi.kern }
end kerns.bottom_left = k end
local v = mk.bottom_right if v then local k = { } for i=1,#v do local vi = v[i]
k[i] = { height = vdelta*vi.height, kern = vdelta*vi.kern }
end kerns.bottom_right = k end
chr.mathkern = kerns -- singular -> should be patched in luatex !
end
end
end
if not nodemode then
local vk = character.kerns
if vk then
local s = sharedkerns[vk]
if not s then
s = { }
for k,v in next, vk do s[k] = v*hdelta end
sharedkerns[vk] = s
end
chr.kerns = s
end
local vl = character.ligatures
if vl then
if true then
chr.ligatures = vl -- shared
else
local tt = { }
for i,l in next, vl do
tt[i] = l
end
chr.ligatures = tt
end
end
end
if isvirtual then
local vc = character.commands
if vc then
-- we assume non scaled commands here
-- tricky .. we need to scale pseudo math glyphs too
-- which is why we deal with rules too
local ok = false
for i=1,#vc do
local key = vc[i][1]
if key == "right" or key == "down" then
ok = true
break
end
end
if ok then
local tt = { }
for i=1,#vc do
local ivc = vc[i]
local key = ivc[1]
if key == "right" then
tt[i] = { key, ivc[2]*hdelta }
elseif key == "down" then
tt[i] = { key, ivc[2]*vdelta }
elseif key == "rule" then
tt[i] = { key, ivc[2]*vdelta, ivc[3]*hdelta }
else -- not comment
tt[i] = ivc -- shared since in cache and untouched
end
end
chr.commands = tt
else
chr.commands = vc
end
chr.index = nil
end
end
targetcharacters[unicode] = chr
end
return target
end
function constructors.finalize(tfmdata)
if tfmdata.properties and tfmdata.properties.finalized then
return
end
--
if not tfmdata.characters then
return nil
end
--
if not tfmdata.goodies then
tfmdata.goodies = { } -- context specific
end
--
local parameters = tfmdata.parameters
if not parameters then
return nil
end
--
if not parameters.expansion then
parameters.expansion = {
stretch = tfmdata.stretch or 0,
shrink = tfmdata.shrink or 0,
step = tfmdata.step or 0,
auto = tfmdata.auto_expand or false,
}
end
--
if not parameters.protrusion then
parameters.protrusion = {
auto = auto_protrude
}
end
--
if not parameters.size then
parameters.size = tfmdata.size
end
--
if not parameters.extend_factor then
parameters.extend_factor = tfmdata.extend or 0
end
--
if not parameters.slant_factor then
parameters.slant_factor = tfmdata.slant or 0
end
--
if not parameters.designsize then
parameters.designsize = tfmdata.designsize or 655360
end
--
if not parameters.units then
parameters.units = tfmdata.units_per_em or 1000
end
--
if not tfmdata.descriptions then
local descriptions = { } -- yes or no
setmetatableindex(descriptions, function(t,k) local v = { } t[k] = v return v end)
tfmdata.descriptions = descriptions
end
--
local properties = tfmdata.properties
if not properties then
properties = { }
tfmdata.properties = properties
end
--
if not properties.virtualized then
properties.virtualized = tfmdata.type == "virtual"
end
--
if not tfmdata.properties then
tfmdata.properties = {
fontname = tfmdata.fontname,
filename = tfmdata.filename,
fullname = tfmdata.fullname,
name = tfmdata.name,
psname = tfmdata.psname,
--
encodingbytes = tfmdata.encodingbytes or 1,
embedding = tfmdata.embedding or "subset",
tounicode = tfmdata.tounicode or 1,
cidinfo = tfmdata.cidinfo or nil,
format = tfmdata.format or "type1",
direction = tfmdata.direction or 0,
}
end
if not tfmdata.resources then
tfmdata.resources = { }
end
if not tfmdata.shared then
tfmdata.shared = { }
end
--
-- tfmdata.fonts
-- tfmdata.unscaled
--
if not properties.has_math then
properties.has_math = not tfmdata.nomath
end
--
tfmdata.MathConstants = nil
tfmdata.postprocessors = nil
--
tfmdata.fontname = nil
tfmdata.filename = nil
tfmdata.fullname = nil
tfmdata.name = nil -- most tricky part
tfmdata.psname = nil
--
tfmdata.encodingbytes = nil
tfmdata.embedding = nil
tfmdata.tounicode = nil
tfmdata.cidinfo = nil
tfmdata.format = nil
tfmdata.direction = nil
tfmdata.type = nil
tfmdata.nomath = nil
tfmdata.designsize = nil
--
tfmdata.size = nil
tfmdata.stretch = nil
tfmdata.shrink = nil
tfmdata.step = nil
tfmdata.auto_expand = nil
tfmdata.auto_protrude = nil
tfmdata.extend = nil
tfmdata.slant = nil
tfmdata.units_per_em = nil
--
properties.finalized = true
--
return tfmdata
end
--[[ldx--
A unique hash value is generated by:
--ldx]]--
local hashmethods = { }
constructors.hashmethods = hashmethods
function constructors.hashfeatures(specification) -- will be overloaded
local features = specification.features
if features then
local t, tn = { }, 0
for category, list in next, features do
if next(list) then
local hasher = hashmethods[category]
if hasher then
local hash = hasher(list)
if hash then
tn = tn + 1
t[tn] = category .. ":" .. hash
end
end
end
end
if tn > 0 then
return concat(t," & ")
end
end
return "unknown"
end
hashmethods.normal = function(list)
local s = { }
local n = 0
for k, v in next, list do
if k ~= "number" and k ~= "features" then -- I need to figure this out, features
n = n + 1
s[n] = k
end
end
if n > 0 then
sort(s)
for i=1,n do
local k = s[i]
s[i] = k .. '=' .. tostring(list[k])
end
return concat(s,"+")
end
end
--[[ldx--
In principle we can share tfm tables when we are in node for a font, but then
we need to define a font switch as an id/attr switch which is no fun, so in that
case users can best use dynamic features ... so, we will not use that speedup. Okay,
when we get rid of base mode we can optimize even further by sharing, but then we
loose our testcases for .
--ldx]]--
function constructors.hashinstance(specification,force)
local hash, size, fallbacks = specification.hash, specification.size, specification.fallbacks
if force or not hash then
hash = constructors.hashfeatures(specification)
specification.hash = hash
end
if size < 1000 and designsizes[hash] then
size = math.round(constructors.scaled(size,designsizes[hash]))
specification.size = size
end
-- local mathsize = specification.mathsize or 0
-- if mathsize > 0 then
-- local textsize = specification.textsize
-- if fallbacks then
-- return hash .. ' @ ' .. tostring(size) .. ' [ ' .. tostring(mathsize) .. ' : ' .. tostring(textsize) .. ' ] @ ' .. fallbacks
-- else
-- return hash .. ' @ ' .. tostring(size) .. ' [ ' .. tostring(mathsize) .. ' : ' .. tostring(textsize) .. ' ]'
-- end
-- else
if fallbacks then
return hash .. ' @ ' .. tostring(size) .. ' @ ' .. fallbacks
else
return hash .. ' @ ' .. tostring(size)
end
-- end
end
function constructors.setname(tfmdata,specification) -- todo: get specification from tfmdata
if constructors.namemode == "specification" then
-- not to be used in context !
local specname = specification.specification
if specname then
tfmdata.properties.name = specname
if trace_defining then
report_otf("overloaded fontname: '%s'",specname)
end
end
end
end
function constructors.checkedfilename(data)
local foundfilename = data.foundfilename
if not foundfilename then
local askedfilename = data.filename or ""
if askedfilename ~= "" then
askedfilename = resolvers.resolve(askedfilename) -- no shortcut
foundfilename = resolvers.findbinfile(askedfilename,"") or ""
if foundfilename == "" then
report_defining("source file '%s' is not found",askedfilename)
foundfilename = resolvers.findbinfile(file.basename(askedfilename),"") or ""
if foundfilename ~= "" then
report_defining("using source file '%s' (cache mismatch)",foundfilename)
end
end
end
data.foundfilename = foundfilename
end
return foundfilename
end
local formats = allocate()
fonts.formats = formats
setmetatableindex(formats, function(t,k)
local l = lower(k)
if rawget(t,k) then
t[k] = l
return l
end
return rawget(t,file.extname(l))
end)
local locations = { }
local function setindeed(mode,target,group,name,action,position)
local t = target[mode]
if not t then
report_defining("fatal error in setting feature '%s', group '%s', mode '%s'",name or "?",group or "?",mode)
os.exit()
elseif position then
-- todo: remove existing
insert(t, position, { name = name, action = action })
else
for i=1,#t do
local ti = t[i]
if ti.name == name then
ti.action = action
return
end
end
insert(t, { name = name, action = action })
end
end
local function set(group,name,target,source)
target = target[group]
if not target then
report_defining("fatal target error in setting feature '%s', group '%s'",name or "?",group or "?")
os.exit()
end
local source = source[group]
if not source then
report_defining("fatal source error in setting feature '%s', group '%s'",name or "?",group or "?")
os.exit()
end
local node = source.node
local base = source.base
local position = source.position
if node then
setindeed("node",target,group,name,node,position)
end
if base then
setindeed("base",target,group,name,base,position)
end
end
local function register(where,specification)
local name = specification.name
if name and name ~= "" then
local default = specification.default
local description = specification.description
local initializers = specification.initializers
local processors = specification.processors
local manipulators = specification.manipulators
local modechecker = specification.modechecker
if default then
where.defaults[name] = default
end
if description and description ~= "" then
where.descriptions[name] = description
end
if initializers then
set('initializers',name,where,specification)
end
if processors then
set('processors', name,where,specification)
end
if manipulators then
set('manipulators',name,where,specification)
end
if modechecker then
where.modechecker = modechecker
end
end
end
constructors.registerfeature = register
function constructors.getfeatureaction(what,where,mode,name)
what = handlers[what].features
if what then
where = what[where]
if where then
mode = where[mode]
if mode then
for i=1,#mode do
local m = mode[i]
if m.name == name then
return m.action
end
end
end
end
end
end
function constructors.newfeatures(what)
local features = handlers[what].features
if not features then
local tables = handlers[what].tables -- can be preloaded
features = allocate {
defaults = { },
descriptions = tables and tables.features or { },
initializers = { base = { }, node = { } },
processors = { base = { }, node = { } },
manipulators = { base = { }, node = { } },
}
features.register = function(specification) return register(features,specification) end
handlers[what].features = features -- will also become hidden
end
return features
end
--[[ldx--
We need to check for default features. For this we provide
a helper function.
--ldx]]--
function constructors.checkedfeatures(what,features)
local defaults = handlers[what].features.defaults
if features and next(features) then
features = fastcopy(features) -- can be inherited
for key, value in next, defaults do
if features[key] == nil then
features[key] = value
end
end
return features
else
return fastcopy(defaults) -- we can change features in place
end
end
-- before scaling
function constructors.initializefeatures(what,tfmdata,features,trace,report)
if features and next(features) then
local properties = tfmdata.properties or { } -- brrr
local whathandler = handlers[what]
local whatfeatures = whathandler.features
local whatinitializers = whatfeatures.initializers
local whatmodechecker = whatfeatures.modechecker
-- properties.mode can be enforces (for instance in font-otd)
local mode = properties.mode or (whatmodechecker and whatmodechecker(tfmdata,features,features.mode)) or features.mode or "base"
properties.mode = mode -- also status
features.mode = mode -- both properties.mode or features.mode can be changed
--
local done = { }
while true do
local redo = false
local initializers = whatfeatures.initializers[mode]
if initializers then
for i=1,#initializers do
local step = initializers[i]
local feature = step.name
-- we could intercept mode here .. needs a rewrite of this whole loop then but it's cleaner that way
local value = features[feature]
if not value then
-- disabled
elseif done[feature] then
-- already done
else
local action = step.action
if trace then
report("initializing feature %s to %s for mode %s for font %s",feature,
tostring(value),mode or 'unknown', tfmdata.properties.fullname or 'unknown')
end
action(tfmdata,value,features) -- can set mode (e.g. goodies) so it can trigger a restart
if mode ~= properties.mode or mode ~= features.mode then
if whatmodechecker then
properties.mode = whatmodechecker(tfmdata,features,properties.mode) -- force checking
features.mode = properties.mode
end
if mode ~= properties.mode then
mode = properties.mode
redo = true
end
end
done[feature] = true
end
if redo then
break
end
end
if not redo then
break
end
else
break
end
end
properties.mode = mode -- to be sure
return true
else
return false
end
end
-- while typesetting
function constructors.collectprocessors(what,tfmdata,features,trace,report)
local processes, nofprocesses = { }, 0
if features and next(features) then
local properties = tfmdata.properties
local whathandler = handlers[what]
local whatfeatures = whathandler.features
local whatprocessors = whatfeatures.processors
local processors = whatprocessors[properties.mode]
if processors then
for i=1,#processors do
local step = processors[i]
local feature = step.name
if features[feature] then
local action = step.action
if trace then
report("installing feature processor %s for mode %s for font %s",feature,
mode or 'unknown', tfmdata.properties.fullname or 'unknown')
end
if action then
nofprocesses = nofprocesses + 1
processes[nofprocesses] = action
end
end
end
else
report("no feature processors for mode %s for font %s",
mode or 'unknown', tfmdata.properties.fullname or 'unknown')
end
end
return processes
end
-- after scaling
function constructors.applymanipulators(what,tfmdata,features,trace,report)
if features and next(features) then
local properties = tfmdata.properties
local whathandler = handlers[what]
local whatfeatures = whathandler.features
local whatmanipulators = whatfeatures.manipulators
local manipulators = whatmanipulators[properties.mode]
if manipulators then
for i=1,#manipulators do
local step = manipulators[i]
local feature = step.name
local value = features[feature]
if value then
local action = step.action
if trace then
report("applying feature manipulator %s for mode %s for font %s",feature,
mode or 'unknown', tfmdata.properties.fullname or 'unknown')
end
if action then
action(tfmdata,feature,value)
end
end
end
end
end
end