diff options
Diffstat (limited to 'Master/texmf-dist/tex/context/base/mkiv/font-imp-dimensions.lua')
-rw-r--r-- | Master/texmf-dist/tex/context/base/mkiv/font-imp-dimensions.lua | 115 |
1 files changed, 115 insertions, 0 deletions
diff --git a/Master/texmf-dist/tex/context/base/mkiv/font-imp-dimensions.lua b/Master/texmf-dist/tex/context/base/mkiv/font-imp-dimensions.lua new file mode 100644 index 00000000000..a7125625da7 --- /dev/null +++ b/Master/texmf-dist/tex/context/base/mkiv/font-imp-dimensions.lua @@ -0,0 +1,115 @@ +if not modules then modules = { } end modules ['font-imp-dimensions'] = { + version = 1.001, + comment = "companion to font-ini.mkiv and hand-ini.mkiv", + author = "Hans Hagen, PRAGMA-ADE, Hasselt NL", + copyright = "PRAGMA ADE / ConTeXt Development Team", + license = "see context related readme files" +} + +if not context then return end + +local next, type, tonumber = next, type, tonumber + +local fonts = fonts +local utilities = utilities + +local helpers = fonts.helpers +local prependcommands = helpers.prependcommands +local charcommand = helpers.commands.char +local rightcommand = helpers.commands.right + +local handlers = fonts.handlers +local otf = handlers.otf +local afm = handlers.afm + +local registerotffeature = otf.features.register +local registerafmfeature = afm.features.register + +local settings_to_array = utilities.parsers.settings_to_array +local gettexdimen = tex.getdimen + +-- For Wolfgang Schuster: +-- +-- \definefontfeature[thisway][default][script=hang,language=zhs,dimensions={2,2,2}] +-- \definedfont[file:kozminpr6nregular*thisway] + +local function initialize(tfmdata,key,value) + if type(value) == "string" and value ~= "" then + local characters = tfmdata.characters + local parameters = tfmdata.parameters + local emwidth = parameters.quad + local exheight = parameters.xheight + local newwidth = false + local newheight = false + local newdepth = false + if value == "strut" then + newheight = gettexdimen("strutht") + newdepth = gettexdimen("strutdp") + elseif value == "mono" then + newwidth = emwidth + else + local spec = settings_to_array(value) + newwidth = tonumber(spec[1]) + newheight = tonumber(spec[2]) + newdepth = tonumber(spec[3]) + if newwidth then newwidth = newwidth * emwidth end + if newheight then newheight = newheight * exheight end + if newdepth then newdepth = newdepth * exheight end + end + if newwidth or newheight or newdepth then + for unicode, character in next, characters do + local oldwidth = character.width + local oldheight = character.height + local olddepth = character.depth + local width = newwidth or oldwidth or 0 + local height = newheight or oldheight or 0 + local depth = newdepth or olddepth or 0 + if oldwidth ~= width or oldheight ~= height or olddepth ~= depth then + character.width = width + character.height = height + character.depth = depth + if oldwidth ~= width then + local commands = character.commands + local hshift = rightcommand[(width - oldwidth) / 2] + if commands then + character.commands = prependcommands ( + commands, + hshift + ) + else + character.commands = { + hshift, + charcommand[unicode], + } + end + end + end + end + end + end +end + +local specification = { + name = "dimensions", + description = "force dimensions", + manipulators = { + base = initialize, + node = initialize, + } +} + +registerotffeature(specification) +registerafmfeature(specification) + +local function initialize(tfmdata,value) + tfmdata.properties.realdimensions = value and true +end + +registerotffeature { + name = "realdimensions", + description = "accept negative dimenions", + initializers = { + base = initialize, + node = initialize, + } +} |