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-rw-r--r--tex/context/base/font-def.lua898
1 files changed, 449 insertions, 449 deletions
diff --git a/tex/context/base/font-def.lua b/tex/context/base/font-def.lua
index 7e01c5620..bee02e8dc 100644
--- a/tex/context/base/font-def.lua
+++ b/tex/context/base/font-def.lua
@@ -1,449 +1,449 @@
-if not modules then modules = { } end modules ['font-def'] = {
- 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"
-}
-
--- We can overload some of the definers.functions so we don't local them.
-
-local format, gmatch, match, find, lower, gsub = string.format, string.gmatch, string.match, string.find, string.lower, string.gsub
-local tostring, next = tostring, next
-local lpegmatch = lpeg.match
-
-local allocate = utilities.storage.allocate
-
-local trace_defining = false trackers .register("fonts.defining", function(v) trace_defining = v end)
-local directive_embedall = false directives.register("fonts.embedall", function(v) directive_embedall = v end)
-
-trackers.register("fonts.loading", "fonts.defining", "otf.loading", "afm.loading", "tfm.loading")
-trackers.register("fonts.all", "fonts.*", "otf.*", "afm.*", "tfm.*")
-
-local report_defining = logs.reporter("fonts","defining")
-
---[[ldx--
-<p>Here we deal with defining fonts. We do so by intercepting the
-default loader that only handles <l n='tfm'/>.</p>
---ldx]]--
-
-local fonts = fonts
-local fontdata = fonts.hashes.identifiers
-local readers = fonts.readers
-local definers = fonts.definers
-local specifiers = fonts.specifiers
-local constructors = fonts.constructors
-local fontgoodies = fonts.goodies
-
-readers.sequence = allocate { 'otf', 'ttf', 'afm', 'tfm', 'lua' } -- dfont ttc
-
-local variants = allocate()
-specifiers.variants = variants
-
-definers.methods = definers.methods or { }
-
-local internalized = allocate() -- internal tex numbers (private)
-local lastdefined = nil -- we don't want this one to end up in s-tra-02
-
-local loadedfonts = constructors.loadedfonts
-local designsizes = constructors.designsizes
-
--- not in generic (some day I'll make two defs, one for context, one for generic)
-
-local resolvefile = fontgoodies and fontgoodies.filenames and fontgoodies.filenames.resolve or function(s) return s end
-
---[[ldx--
-<p>We hardly gain anything when we cache the final (pre scaled)
-<l n='tfm'/> table. But it can be handy for debugging, so we no
-longer carry this code along. Also, we now have quite some reference
-to other tables so we would end up with lots of catches.</p>
---ldx]]--
-
---[[ldx--
-<p>We can prefix a font specification by <type>name:</type> or
-<type>file:</type>. The first case will result in a lookup in the
-synonym table.</p>
-
-<typing>
-[ name: | file: ] identifier [ separator [ specification ] ]
-</typing>
-
-<p>The following function split the font specification into components
-and prepares a table that will move along as we proceed.</p>
---ldx]]--
-
--- beware, we discard additional specs
---
--- method:name method:name(sub) method:name(sub)*spec method:name*spec
--- name name(sub) name(sub)*spec name*spec
--- name@spec*oeps
-
-local splitter, splitspecifiers = nil, "" -- not so nice
-
-local P, C, S, Cc = lpeg.P, lpeg.C, lpeg.S, lpeg.Cc
-
-local left = P("(")
-local right = P(")")
-local colon = P(":")
-local space = P(" ")
-
-definers.defaultlookup = "file"
-
-local prefixpattern = P(false)
-
-local function addspecifier(symbol)
- splitspecifiers = splitspecifiers .. symbol
- local method = S(splitspecifiers)
- local lookup = C(prefixpattern) * colon
- local sub = left * C(P(1-left-right-method)^1) * right
- local specification = C(method) * C(P(1)^1)
- local name = C((1-sub-specification)^1)
- splitter = P((lookup + Cc("")) * name * (sub + Cc("")) * (specification + Cc("")))
-end
-
-local function addlookup(str,default)
- prefixpattern = prefixpattern + P(str)
-end
-
-definers.addlookup = addlookup
-
-addlookup("file")
-addlookup("name")
-addlookup("spec")
-
-local function getspecification(str)
- return lpegmatch(splitter,str)
-end
-
-definers.getspecification = getspecification
-
-function definers.registersplit(symbol,action,verbosename)
- addspecifier(symbol)
- variants[symbol] = action
- if verbosename then
- variants[verbosename] = action
- end
-end
-
-local function makespecification(specification,lookup,name,sub,method,detail,size)
- size = size or 655360
- if not lookup or lookup == "" then
- lookup = definers.defaultlookup
- end
- if trace_defining then
- report_defining("specification %a, lookup %a, name %a, sub %a, method %a, detail %a",
- specification, lookup, name, sub, method, detail)
- end
- local t = {
- lookup = lookup, -- forced type
- specification = specification, -- full specification
- size = size, -- size in scaled points or -1000*n
- name = name, -- font or filename
- sub = sub, -- subfont (eg in ttc)
- method = method, -- specification method
- detail = detail, -- specification
- resolved = "", -- resolved font name
- forced = "", -- forced loader
- features = { }, -- preprocessed features
- }
- return t
-end
-
-
-definers.makespecification = makespecification
-
-function definers.analyze(specification, size)
- -- can be optimized with locals
- local lookup, name, sub, method, detail = getspecification(specification or "")
- return makespecification(specification, lookup, name, sub, method, detail, size)
-end
-
---[[ldx--
-<p>We can resolve the filename using the next function:</p>
---ldx]]--
-
-definers.resolvers = definers.resolvers or { }
-local resolvers = definers.resolvers
-
--- todo: reporter
-
-function resolvers.file(specification)
- local name = resolvefile(specification.name) -- catch for renames
- local suffix = file.suffix(name)
- if fonts.formats[suffix] then
- specification.forced = suffix
- specification.name = file.removesuffix(name)
- else
- specification.name = name -- can be resolved
- end
-end
-
-function resolvers.name(specification)
- local resolve = fonts.names.resolve
- if resolve then
- local resolved, sub = resolve(specification.name,specification.sub,specification) -- we pass specification for overloaded versions
- if resolved then
- specification.resolved = resolved
- specification.sub = sub
- local suffix = file.suffix(resolved)
- if fonts.formats[suffix] then
- specification.forced = suffix
- specification.name = file.removesuffix(resolved)
- else
- specification.name = resolved
- end
- end
- else
- resolvers.file(specification)
- end
-end
-
-function resolvers.spec(specification)
- local resolvespec = fonts.names.resolvespec
- if resolvespec then
- local resolved, sub = resolvespec(specification.name,specification.sub,specification) -- we pass specification for overloaded versions
- if resolved then
- specification.resolved = resolved
- specification.sub = sub
- specification.forced = file.suffix(resolved)
- specification.name = file.removesuffix(resolved)
- end
- else
- resolvers.name(specification)
- end
-end
-
-function definers.resolve(specification)
- if not specification.resolved or specification.resolved == "" then -- resolved itself not per se in mapping hash
- local r = resolvers[specification.lookup]
- if r then
- r(specification)
- end
- end
- if specification.forced == "" then
- specification.forced = nil
- else
- specification.forced = specification.forced
- end
- specification.hash = lower(specification.name .. ' @ ' .. constructors.hashfeatures(specification))
- if specification.sub and specification.sub ~= "" then
- specification.hash = specification.sub .. ' @ ' .. specification.hash
- end
- return specification
-end
-
---[[ldx--
-<p>The main read function either uses a forced reader (as determined by
-a lookup) or tries to resolve the name using the list of readers.</p>
-
-<p>We need to cache when possible. We do cache raw tfm data (from <l
-n='tfm'/>, <l n='afm'/> or <l n='otf'/>). After that we can cache based
-on specificstion (name) and size, that is, <l n='tex'/> only needs a number
-for an already loaded fonts. However, it may make sense to cache fonts
-before they're scaled as well (store <l n='tfm'/>'s with applied methods
-and features). However, there may be a relation between the size and
-features (esp in virtual fonts) so let's not do that now.</p>
-
-<p>Watch out, here we do load a font, but we don't prepare the
-specification yet.</p>
---ldx]]--
-
--- very experimental:
-
-function definers.applypostprocessors(tfmdata)
- local postprocessors = tfmdata.postprocessors
- if postprocessors then
- local properties = tfmdata.properties
- for i=1,#postprocessors do
- local extrahash = postprocessors[i](tfmdata) -- after scaling etc
- if type(extrahash) == "string" and extrahash ~= "" then
- -- e.g. a reencoding needs this
- extrahash = gsub(lower(extrahash),"[^a-z]","-")
- properties.fullname = format("%s-%s",properties.fullname,extrahash)
- end
- end
- end
- return tfmdata
-end
-
--- function definers.applypostprocessors(tfmdata)
--- return tfmdata
--- end
-
-local function checkembedding(tfmdata)
- local properties = tfmdata.properties
- local embedding
- if directive_embedall then
- embedding = "full"
- elseif properties and properties.filename and constructors.dontembed[properties.filename] then
- embedding = "no"
- else
- embedding = "subset"
- end
- if properties then
- properties.embedding = embedding
- else
- tfmdata.properties = { embedding = embedding }
- end
- tfmdata.embedding = embedding
-end
-
-function definers.loadfont(specification)
- local hash = constructors.hashinstance(specification)
- local tfmdata = loadedfonts[hash] -- hashes by size !
- if not tfmdata then
- local forced = specification.forced or ""
- if forced ~= "" then
- local reader = readers[lower(forced)]
- tfmdata = reader and reader(specification)
- if not tfmdata then
- report_defining("forced type %a of %a not found",forced,specification.name)
- end
- else
- local sequence = readers.sequence -- can be overloaded so only a shortcut here
- for s=1,#sequence do
- local reader = sequence[s]
- if readers[reader] then -- we skip not loaded readers
- if trace_defining then
- report_defining("trying (reader sequence driven) type %a for %a with file %a",reader,specification.name,specification.filename)
- end
- tfmdata = readers[reader](specification)
- if tfmdata then
- break
- else
- specification.filename = nil
- end
- end
- end
- end
- if tfmdata then
- tfmdata = definers.applypostprocessors(tfmdata)
- checkembedding(tfmdata) -- todo: general postprocessor
- loadedfonts[hash] = tfmdata
- designsizes[specification.hash] = tfmdata.parameters.designsize
- end
- end
- if not tfmdata then
- report_defining("font with asked name %a is not found using lookup %a",specification.name,specification.lookup)
- end
- return tfmdata
-end
-
-function constructors.checkvirtualids()
- -- dummy in plain version
-end
-
-function constructors.readanddefine(name,size) -- no id -- maybe a dummy first
- local specification = definers.analyze(name,size)
- local method = specification.method
- if method and variants[method] then
- specification = variants[method](specification)
- end
- specification = definers.resolve(specification)
- local hash = constructors.hashinstance(specification)
- local id = definers.registered(hash)
- if not id then
- local tfmdata = definers.loadfont(specification)
- if tfmdata then
- tfmdata.properties.hash = hash
- constructors.checkvirtualids(tfmdata) -- experiment, will become obsolete when slots can selfreference
- id = font.define(tfmdata)
- definers.register(tfmdata,id)
- else
- id = 0 -- signal
- end
- end
- return fontdata[id], id
-end
-
---[[ldx--
-<p>So far the specifiers. Now comes the real definer. Here we cache
-based on id's. Here we also intercept the virtual font handler. Since
-it evolved stepwise I may rewrite this bit (combine code).</p>
-
-In the previously defined reader (the one resulting in a <l n='tfm'/>
-table) we cached the (scaled) instances. Here we cache them again, but
-this time based on id. We could combine this in one cache but this does
-not gain much. By the way, passing id's back to in the callback was
-introduced later in the development.</p>
---ldx]]--
-
-function definers.current() -- or maybe current
- return lastdefined
-end
-
-function definers.registered(hash)
- local id = internalized[hash]
- return id, id and fontdata[id]
-end
-
-function definers.register(tfmdata,id)
- if tfmdata and id then
- local hash = tfmdata.properties.hash
- if not hash then
- report_defining("registering font, id %a, name %a, invalid hash",id,tfmdata.properties.filename or "?")
- elseif not internalized[hash] then
- internalized[hash] = id
- if trace_defining then
- report_defining("registering font, id %s, hash %a",id,hash)
- end
- fontdata[id] = tfmdata
- end
- end
-end
-
-function definers.read(specification,size,id) -- id can be optional, name can already be table
- statistics.starttiming(fonts)
- if type(specification) == "string" then
- specification = definers.analyze(specification,size)
- end
- local method = specification.method
- if method and variants[method] then
- specification = variants[method](specification)
- end
- specification = definers.resolve(specification)
- local hash = constructors.hashinstance(specification)
- local tfmdata = definers.registered(hash) -- id
- if tfmdata then
- if trace_defining then
- report_defining("already hashed: %s",hash)
- end
- else
- tfmdata = definers.loadfont(specification) -- can be overloaded
- if tfmdata then
- if trace_defining then
- report_defining("loaded and hashed: %s",hash)
- end
- tfmdata.properties.hash = hash
- if id then
- definers.register(tfmdata,id)
- end
- else
- if trace_defining then
- report_defining("not loaded and hashed: %s",hash)
- end
- end
- end
- lastdefined = tfmdata or id -- todo ! ! ! ! !
- if not tfmdata then -- or id?
- report_defining( "unknown font %a, loading aborted",specification.name)
- elseif trace_defining and type(tfmdata) == "table" then
- local properties = tfmdata.properties or { }
- local parameters = tfmdata.parameters or { }
- report_defining("using %s font with id %a, name %a, size %a, bytes %a, encoding %a, fullname %a, filename %a",
- properties.format, id, properties.name, parameters.size, properties.encodingbytes,
- properties.encodingname, properties.fullname, file.basename(properties.filename))
- end
- statistics.stoptiming(fonts)
- return tfmdata
-end
-
-function font.getfont(id)
- return fontdata[id] -- otherwise issues
-end
-
---[[ldx--
-<p>We overload the <l n='tfm'/> reader.</p>
---ldx]]--
-
-callbacks.register('define_font', definers.read, "definition of fonts (tfmdata preparation)")
+if not modules then modules = { } end modules ['font-def'] = {
+ 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"
+}
+
+-- We can overload some of the definers.functions so we don't local them.
+
+local format, gmatch, match, find, lower, gsub = string.format, string.gmatch, string.match, string.find, string.lower, string.gsub
+local tostring, next = tostring, next
+local lpegmatch = lpeg.match
+
+local allocate = utilities.storage.allocate
+
+local trace_defining = false trackers .register("fonts.defining", function(v) trace_defining = v end)
+local directive_embedall = false directives.register("fonts.embedall", function(v) directive_embedall = v end)
+
+trackers.register("fonts.loading", "fonts.defining", "otf.loading", "afm.loading", "tfm.loading")
+trackers.register("fonts.all", "fonts.*", "otf.*", "afm.*", "tfm.*")
+
+local report_defining = logs.reporter("fonts","defining")
+
+--[[ldx--
+<p>Here we deal with defining fonts. We do so by intercepting the
+default loader that only handles <l n='tfm'/>.</p>
+--ldx]]--
+
+local fonts = fonts
+local fontdata = fonts.hashes.identifiers
+local readers = fonts.readers
+local definers = fonts.definers
+local specifiers = fonts.specifiers
+local constructors = fonts.constructors
+local fontgoodies = fonts.goodies
+
+readers.sequence = allocate { 'otf', 'ttf', 'afm', 'tfm', 'lua' } -- dfont ttc
+
+local variants = allocate()
+specifiers.variants = variants
+
+definers.methods = definers.methods or { }
+
+local internalized = allocate() -- internal tex numbers (private)
+local lastdefined = nil -- we don't want this one to end up in s-tra-02
+
+local loadedfonts = constructors.loadedfonts
+local designsizes = constructors.designsizes
+
+-- not in generic (some day I'll make two defs, one for context, one for generic)
+
+local resolvefile = fontgoodies and fontgoodies.filenames and fontgoodies.filenames.resolve or function(s) return s end
+
+--[[ldx--
+<p>We hardly gain anything when we cache the final (pre scaled)
+<l n='tfm'/> table. But it can be handy for debugging, so we no
+longer carry this code along. Also, we now have quite some reference
+to other tables so we would end up with lots of catches.</p>
+--ldx]]--
+
+--[[ldx--
+<p>We can prefix a font specification by <type>name:</type> or
+<type>file:</type>. The first case will result in a lookup in the
+synonym table.</p>
+
+<typing>
+[ name: | file: ] identifier [ separator [ specification ] ]
+</typing>
+
+<p>The following function split the font specification into components
+and prepares a table that will move along as we proceed.</p>
+--ldx]]--
+
+-- beware, we discard additional specs
+--
+-- method:name method:name(sub) method:name(sub)*spec method:name*spec
+-- name name(sub) name(sub)*spec name*spec
+-- name@spec*oeps
+
+local splitter, splitspecifiers = nil, "" -- not so nice
+
+local P, C, S, Cc = lpeg.P, lpeg.C, lpeg.S, lpeg.Cc
+
+local left = P("(")
+local right = P(")")
+local colon = P(":")
+local space = P(" ")
+
+definers.defaultlookup = "file"
+
+local prefixpattern = P(false)
+
+local function addspecifier(symbol)
+ splitspecifiers = splitspecifiers .. symbol
+ local method = S(splitspecifiers)
+ local lookup = C(prefixpattern) * colon
+ local sub = left * C(P(1-left-right-method)^1) * right
+ local specification = C(method) * C(P(1)^1)
+ local name = C((1-sub-specification)^1)
+ splitter = P((lookup + Cc("")) * name * (sub + Cc("")) * (specification + Cc("")))
+end
+
+local function addlookup(str,default)
+ prefixpattern = prefixpattern + P(str)
+end
+
+definers.addlookup = addlookup
+
+addlookup("file")
+addlookup("name")
+addlookup("spec")
+
+local function getspecification(str)
+ return lpegmatch(splitter,str)
+end
+
+definers.getspecification = getspecification
+
+function definers.registersplit(symbol,action,verbosename)
+ addspecifier(symbol)
+ variants[symbol] = action
+ if verbosename then
+ variants[verbosename] = action
+ end
+end
+
+local function makespecification(specification,lookup,name,sub,method,detail,size)
+ size = size or 655360
+ if not lookup or lookup == "" then
+ lookup = definers.defaultlookup
+ end
+ if trace_defining then
+ report_defining("specification %a, lookup %a, name %a, sub %a, method %a, detail %a",
+ specification, lookup, name, sub, method, detail)
+ end
+ local t = {
+ lookup = lookup, -- forced type
+ specification = specification, -- full specification
+ size = size, -- size in scaled points or -1000*n
+ name = name, -- font or filename
+ sub = sub, -- subfont (eg in ttc)
+ method = method, -- specification method
+ detail = detail, -- specification
+ resolved = "", -- resolved font name
+ forced = "", -- forced loader
+ features = { }, -- preprocessed features
+ }
+ return t
+end
+
+
+definers.makespecification = makespecification
+
+function definers.analyze(specification, size)
+ -- can be optimized with locals
+ local lookup, name, sub, method, detail = getspecification(specification or "")
+ return makespecification(specification, lookup, name, sub, method, detail, size)
+end
+
+--[[ldx--
+<p>We can resolve the filename using the next function:</p>
+--ldx]]--
+
+definers.resolvers = definers.resolvers or { }
+local resolvers = definers.resolvers
+
+-- todo: reporter
+
+function resolvers.file(specification)
+ local name = resolvefile(specification.name) -- catch for renames
+ local suffix = file.suffix(name)
+ if fonts.formats[suffix] then
+ specification.forced = suffix
+ specification.name = file.removesuffix(name)
+ else
+ specification.name = name -- can be resolved
+ end
+end
+
+function resolvers.name(specification)
+ local resolve = fonts.names.resolve
+ if resolve then
+ local resolved, sub = resolve(specification.name,specification.sub,specification) -- we pass specification for overloaded versions
+ if resolved then
+ specification.resolved = resolved
+ specification.sub = sub
+ local suffix = file.suffix(resolved)
+ if fonts.formats[suffix] then
+ specification.forced = suffix
+ specification.name = file.removesuffix(resolved)
+ else
+ specification.name = resolved
+ end
+ end
+ else
+ resolvers.file(specification)
+ end
+end
+
+function resolvers.spec(specification)
+ local resolvespec = fonts.names.resolvespec
+ if resolvespec then
+ local resolved, sub = resolvespec(specification.name,specification.sub,specification) -- we pass specification for overloaded versions
+ if resolved then
+ specification.resolved = resolved
+ specification.sub = sub
+ specification.forced = file.suffix(resolved)
+ specification.name = file.removesuffix(resolved)
+ end
+ else
+ resolvers.name(specification)
+ end
+end
+
+function definers.resolve(specification)
+ if not specification.resolved or specification.resolved == "" then -- resolved itself not per se in mapping hash
+ local r = resolvers[specification.lookup]
+ if r then
+ r(specification)
+ end
+ end
+ if specification.forced == "" then
+ specification.forced = nil
+ else
+ specification.forced = specification.forced
+ end
+ specification.hash = lower(specification.name .. ' @ ' .. constructors.hashfeatures(specification))
+ if specification.sub and specification.sub ~= "" then
+ specification.hash = specification.sub .. ' @ ' .. specification.hash
+ end
+ return specification
+end
+
+--[[ldx--
+<p>The main read function either uses a forced reader (as determined by
+a lookup) or tries to resolve the name using the list of readers.</p>
+
+<p>We need to cache when possible. We do cache raw tfm data (from <l
+n='tfm'/>, <l n='afm'/> or <l n='otf'/>). After that we can cache based
+on specificstion (name) and size, that is, <l n='tex'/> only needs a number
+for an already loaded fonts. However, it may make sense to cache fonts
+before they're scaled as well (store <l n='tfm'/>'s with applied methods
+and features). However, there may be a relation between the size and
+features (esp in virtual fonts) so let's not do that now.</p>
+
+<p>Watch out, here we do load a font, but we don't prepare the
+specification yet.</p>
+--ldx]]--
+
+-- very experimental:
+
+function definers.applypostprocessors(tfmdata)
+ local postprocessors = tfmdata.postprocessors
+ if postprocessors then
+ local properties = tfmdata.properties
+ for i=1,#postprocessors do
+ local extrahash = postprocessors[i](tfmdata) -- after scaling etc
+ if type(extrahash) == "string" and extrahash ~= "" then
+ -- e.g. a reencoding needs this
+ extrahash = gsub(lower(extrahash),"[^a-z]","-")
+ properties.fullname = format("%s-%s",properties.fullname,extrahash)
+ end
+ end
+ end
+ return tfmdata
+end
+
+-- function definers.applypostprocessors(tfmdata)
+-- return tfmdata
+-- end
+
+local function checkembedding(tfmdata)
+ local properties = tfmdata.properties
+ local embedding
+ if directive_embedall then
+ embedding = "full"
+ elseif properties and properties.filename and constructors.dontembed[properties.filename] then
+ embedding = "no"
+ else
+ embedding = "subset"
+ end
+ if properties then
+ properties.embedding = embedding
+ else
+ tfmdata.properties = { embedding = embedding }
+ end
+ tfmdata.embedding = embedding
+end
+
+function definers.loadfont(specification)
+ local hash = constructors.hashinstance(specification)
+ local tfmdata = loadedfonts[hash] -- hashes by size !
+ if not tfmdata then
+ local forced = specification.forced or ""
+ if forced ~= "" then
+ local reader = readers[lower(forced)]
+ tfmdata = reader and reader(specification)
+ if not tfmdata then
+ report_defining("forced type %a of %a not found",forced,specification.name)
+ end
+ else
+ local sequence = readers.sequence -- can be overloaded so only a shortcut here
+ for s=1,#sequence do
+ local reader = sequence[s]
+ if readers[reader] then -- we skip not loaded readers
+ if trace_defining then
+ report_defining("trying (reader sequence driven) type %a for %a with file %a",reader,specification.name,specification.filename)
+ end
+ tfmdata = readers[reader](specification)
+ if tfmdata then
+ break
+ else
+ specification.filename = nil
+ end
+ end
+ end
+ end
+ if tfmdata then
+ tfmdata = definers.applypostprocessors(tfmdata)
+ checkembedding(tfmdata) -- todo: general postprocessor
+ loadedfonts[hash] = tfmdata
+ designsizes[specification.hash] = tfmdata.parameters.designsize
+ end
+ end
+ if not tfmdata then
+ report_defining("font with asked name %a is not found using lookup %a",specification.name,specification.lookup)
+ end
+ return tfmdata
+end
+
+function constructors.checkvirtualids()
+ -- dummy in plain version
+end
+
+function constructors.readanddefine(name,size) -- no id -- maybe a dummy first
+ local specification = definers.analyze(name,size)
+ local method = specification.method
+ if method and variants[method] then
+ specification = variants[method](specification)
+ end
+ specification = definers.resolve(specification)
+ local hash = constructors.hashinstance(specification)
+ local id = definers.registered(hash)
+ if not id then
+ local tfmdata = definers.loadfont(specification)
+ if tfmdata then
+ tfmdata.properties.hash = hash
+ constructors.checkvirtualids(tfmdata) -- experiment, will become obsolete when slots can selfreference
+ id = font.define(tfmdata)
+ definers.register(tfmdata,id)
+ else
+ id = 0 -- signal
+ end
+ end
+ return fontdata[id], id
+end
+
+--[[ldx--
+<p>So far the specifiers. Now comes the real definer. Here we cache
+based on id's. Here we also intercept the virtual font handler. Since
+it evolved stepwise I may rewrite this bit (combine code).</p>
+
+In the previously defined reader (the one resulting in a <l n='tfm'/>
+table) we cached the (scaled) instances. Here we cache them again, but
+this time based on id. We could combine this in one cache but this does
+not gain much. By the way, passing id's back to in the callback was
+introduced later in the development.</p>
+--ldx]]--
+
+function definers.current() -- or maybe current
+ return lastdefined
+end
+
+function definers.registered(hash)
+ local id = internalized[hash]
+ return id, id and fontdata[id]
+end
+
+function definers.register(tfmdata,id)
+ if tfmdata and id then
+ local hash = tfmdata.properties.hash
+ if not hash then
+ report_defining("registering font, id %a, name %a, invalid hash",id,tfmdata.properties.filename or "?")
+ elseif not internalized[hash] then
+ internalized[hash] = id
+ if trace_defining then
+ report_defining("registering font, id %s, hash %a",id,hash)
+ end
+ fontdata[id] = tfmdata
+ end
+ end
+end
+
+function definers.read(specification,size,id) -- id can be optional, name can already be table
+ statistics.starttiming(fonts)
+ if type(specification) == "string" then
+ specification = definers.analyze(specification,size)
+ end
+ local method = specification.method
+ if method and variants[method] then
+ specification = variants[method](specification)
+ end
+ specification = definers.resolve(specification)
+ local hash = constructors.hashinstance(specification)
+ local tfmdata = definers.registered(hash) -- id
+ if tfmdata then
+ if trace_defining then
+ report_defining("already hashed: %s",hash)
+ end
+ else
+ tfmdata = definers.loadfont(specification) -- can be overloaded
+ if tfmdata then
+ if trace_defining then
+ report_defining("loaded and hashed: %s",hash)
+ end
+ tfmdata.properties.hash = hash
+ if id then
+ definers.register(tfmdata,id)
+ end
+ else
+ if trace_defining then
+ report_defining("not loaded and hashed: %s",hash)
+ end
+ end
+ end
+ lastdefined = tfmdata or id -- todo ! ! ! ! !
+ if not tfmdata then -- or id?
+ report_defining( "unknown font %a, loading aborted",specification.name)
+ elseif trace_defining and type(tfmdata) == "table" then
+ local properties = tfmdata.properties or { }
+ local parameters = tfmdata.parameters or { }
+ report_defining("using %s font with id %a, name %a, size %a, bytes %a, encoding %a, fullname %a, filename %a",
+ properties.format, id, properties.name, parameters.size, properties.encodingbytes,
+ properties.encodingname, properties.fullname, file.basename(properties.filename))
+ end
+ statistics.stoptiming(fonts)
+ return tfmdata
+end
+
+function font.getfont(id)
+ return fontdata[id] -- otherwise issues
+end
+
+--[[ldx--
+<p>We overload the <l n='tfm'/> reader.</p>
+--ldx]]--
+
+callbacks.register('define_font', definers.read, "definition of fonts (tfmdata preparation)")
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-24 02:43:07 +0000