diff options
Diffstat (limited to 'tex/context/base/mkxl/font-fbk.lmt')
| -rw-r--r-- | tex/context/base/mkxl/font-fbk.lmt | 75 |
1 files changed, 72 insertions, 3 deletions
diff --git a/tex/context/base/mkxl/font-fbk.lmt b/tex/context/base/mkxl/font-fbk.lmt index 47d284c84..bdc5265ae 100644 --- a/tex/context/base/mkxl/font-fbk.lmt +++ b/tex/context/base/mkxl/font-fbk.lmt @@ -17,7 +17,7 @@ local next = next local trace_visualize = false trackers.register("fonts.composing.visualize", function(v) trace_visualize = v end) local trace_define = false trackers.register("fonts.composing.define", function(v) trace_define = v end) -local report = logs.reporter("fonts","combining") +local report = logs.reporter("fonts","composing") local allocate = utilities.storage.allocate @@ -50,6 +50,73 @@ local fraction = 0.15 -- 30 units for lucida -- todo: we also need to update the feature hashes ... i'll do that when i'm in the mood -- and/or when i need it +-- \starttext +-- \definefontfeature[default][default][fakecombining=yes,compose=yes] +-- \setupbodyfont[minion] +-- [x][\char"2D9][x][\char"323] ṭḍṃḥ +-- \stoptext + +local missing = { + -- [0x323] = { kind = "bottom", top = 0x307 }, -- dot below + [0x323] = { kind = "bottom", top = 0x2D9 }, -- dot below + -- + -- TODO + -- +} + +local function fakecharacters(tfmdata,value) + if value then + local characters = tfmdata.characters + local descriptions = tfmdata.descriptions + for unicode, detail in next, missing do + local c = characters[k] + if not c then + local kind = detail.kind + if kind == "bottom" then + local u = detail.top + local d = characters[u] + if d then + local ex = tfmdata.parameters.xheight + characters[unicode] = { + width = d.width, + height = 0, + depth = ex/2, + commands = { { "offset", 0, -d.height - ex/5 , u } }, + unicode = unicode, + } + -- we need this for the composer + local d = descriptions[u] + local x = descriptions[0x78] + if d and x then + local t = table.copy(d) + local x = -x.boundingbox[4]/2 + local b = t.boundingbox + b[2] = x + b[4] = x + descriptions[unicode] = t + end + if trace then + report("deriving %C from %C",unicode,u) + end + end + end + end + end + end +end + +local specification = { + name = "fakecombining", + description = "add missing combining accents", + manipulators = { + -- position = 1, -- todo: just before compose + base = fakecharacters, + node = fakecharacters, + } +} + +fonts.handlers.otf.features.register(specification) + local function composecharacters(tfmdata) -- this assumes that slot 1 is self, there will be a proper self some day local characters = tfmdata.characters @@ -110,8 +177,10 @@ local function composecharacters(tfmdata) report("composed %C, base %C, accent %C",i,chr,acc) end local acc_t = charcommand[acc] - local cb = descriptions[chr].boundingbox - local ab = descriptions[acc].boundingbox + local cb = descriptions[chr] + local ab = descriptions[acc] + local cb = cb and cb.boundingbox + local ab = ab and ab.boundingbox -- todo: adapt height if cb and ab then local c_llx = scale*cb[1] |