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|
if not modules then modules = { } end modules ['font-imp-tracing'] = {
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"
}
local abs = math.abs
local next, type = next, type
local concat = table.concat
local formatters = string.formatters
local fonts = fonts
local handlers = fonts.handlers
local registerotffeature = handlers.otf.features.register
local registerafmfeature = handlers.afm.features.register
local settings_to_array = utilities.parsers.settings_to_array
local setmetatableindex = table.setmetatableindex
local helpers = fonts.helpers
local appendcommandtable = helpers.appendcommandtable
local prependcommands = helpers.prependcommands
local charcommand = helpers.commands.char
local variables = interfaces.variables
local v_background = variables.background
local v_frame = variables.frame
local v_empty = variables.empty
local v_none = variables.none
-- d:width d:height d:depth d:rulethickness b:outline b:advance b:baseline s:color
-- local function initialize(tfmdata,key,value)
-- if value then
-- local vfspecials = fonts.helpers.vfspecials
-- local vfcommands = fonts.helpers.commands
-- local backgrounds = vfspecials.backgrounds
-- local outlines = vfspecials.outlines
-- local characters = tfmdata.characters
-- local rulecache = backgrounds
-- local showchar = true
-- local color = "palegray"
-- if type(value) == "string" then
-- value = settings_to_array(value)
-- for i=1,#value do
-- local v = value[i]
-- if v == v_frame then
-- rulecache = outlines
-- elseif v == v_background then
-- rulecache = backgrounds
-- elseif v == v_empty then
-- showchar = false
-- elseif v == v_none then
-- color = nil
-- else
-- color = v
-- end
-- end
-- end
-- local gray = color and { "startcolor", color } or nil
-- local black = gray and { "stopcolor" } or nil
-- for unicode, character in next, characters do
-- local width = character.width or 0
-- local height = character.height or 0
-- local depth = character.depth or 0
-- local rule = rulecache[height][depth][width]
-- if showchar then
-- local commands = character.commands
-- if commands then
-- if gray then
-- character.commands = prependcommands (
-- commands, gray, rule, black
-- )
-- else
-- character.commands = prependcommands (
-- commands, rule
-- )
-- end
-- else
-- local char = charcommand[unicode]
-- if gray then
-- character.commands = {
-- gray, rule, black, char
-- }
-- else
-- character.commands = {
-- rule, char
-- }
-- end
-- end
-- else
-- if gray then
-- character.commands = {
-- gray, rule, black
-- }
-- else
-- character.commands = {
-- rule
-- }
-- end
-- end
-- end
-- end
-- end
local function initialize(tfmdata,key,value)
if value then
local vfspecials = fonts.helpers.vfspecials
local vfcommands = fonts.helpers.commands
local backgrounds = vfspecials.backgrounds
local outlines = vfspecials.outlines
local characters = tfmdata.characters
local rule = { "frame", true, true, true, false, false, false, false, "palegray" }
local showchar = true
if type(value) == "string" then
value = settings_to_array(value)
for i=1,#value do
local v = value[i]
if v == v_frame then
rule[6] = true
elseif v == v_background then
rule[6] = false
elseif v == v_empty then
showchar = false
elseif v == v_none then
rule[9] = false
else
local thickness = string.todimen(v)
if thickness and thickness > 0 then
rule[5] = thickness
else
rule[9] = v
end
end
end
end
if not showchar then
rule = { rule }
end
for unicode, character in next, characters do
if showchar then
local commands = character.commands
if commands then
character.commands = prependcommands ( commands, rule )
else
character.commands = { rule, charcommand[unicode] }
end
else
character.commands = rule
end
end
end
end
local specification = {
name = "boundingbox",
description = "show boundingbox",
manipulators = {
base = initialize,
node = initialize,
}
}
registerotffeature(specification)
registerafmfeature(specification)
local function initialize(tfmdata,key,value)
if value then
local rawdata = tfmdata.shared.rawdata
local rawresources = rawdata and rawdata.resources
local mathconstants = rawresources.mathconstants
if mathconstants then
local vfspecials = fonts.helpers.vfspecials
local vfcommands = fonts.helpers.commands
local backgrounds = vfspecials.backgrounds
local outlines = vfspecials.outlines
local characters = tfmdata.characters
local rulecache = backgrounds
local push = vfcommands.push
local pop = vfcommands.pop
local black = { "stopcolor" }
local itcolor = { "startcolor", "trace:0" } -- s / dd (transparent)
local brcolor = { "startcolor", "trace:1" } -- r / dr
local trcolor = { "startcolor", "trace:2" } -- g / dg
local blcolor = { "startcolor", "trace:3" } -- b / db
local tlcolor = { "startcolor", "trace:4" } -- y / dy
for unicode, character in next, characters do
local mathkerns = character.mathkerns
local italic = character.vitalic or character.italic
if mathkerns or (italic and italic ~= 0) then
local width = character.width or 0
local height = character.height or 0
local depth = character.depth or 0
local list = { }
local count = 0
if italic and italic ~= 0 then
count = count + 1 list[count] = itcolor
count = count + 1 list[count] = push
count = count + 1 list[count] = { "offset", width + (italic < 0 and -italic or 0), 0 }
count = count + 1 list[count] = rulecache[height][depth][abs(-italic)]
count = count + 1 list[count] = pop
count = count + 1 list[count] = black
end
if mathkerns then
local br = mathkerns.bottomright
local tr = mathkerns.topright
local bl = mathkerns.bottomleft
local tl = mathkerns.topleft
if br then
local done = false
for i=1,#br do
local l = br[i]
local h = l.height or 0
local k = l.kern or 0
if k ~= 0 then
if h == 0 then
h = height + depth -- todo max
end
if not done then
count = count + 1 list[count] = brcolor
done = true
end
count = count + 1 list[count] = push
count = count + 1 list[count] = { "offset", width + (k < 0 and k or 0), - depth }
count = count + 1 list[count] = rulecache[h][0][abs(k)]
count = count + 1 list[count] = pop
end
end
if done then
count = count + 1 list[count] = black
end
end
if tr then
local done = false
for i=1,#tr do
local l = tr[i]
local h = l.height or 0
local k = l.kern or 0
if k ~= 0 then
if h == 0 then
h = height + depth -- todo max
end
if not done then
count = count + 1 list[count] = trcolor
done = true
end
count = count + 1 list[count] = push
count = count + 1 list[count] = { "offset", width + (k < 0 and k or 0), height - h }
count = count + 1 list[count] = rulecache[h][0][abs(k)]
count = count + 1 list[count] = pop
end
end
if done then
count = count + 1 list[count] = black
end
end
if bl then
local done = false
for i=1,#bl do
local l = bl[i]
local h = l.height or 0
local k = l.kern or 0
if k ~= 0 then
if h == 0 then
h = height + depth -- todo max
end
if not done then
count = count + 1 list[count] = blcolor
done = true
end
count = count + 1 list[count] = push
count = count + 1 list[count] = { "offset", (k < 0 and k or 0), -depth }
count = count + 1 list[count] = rulecache[h][0][abs(k)]
count = count + 1 list[count] = pop
end
end
if done then
count = count + 1 list[count] = black
end
end
if tl then
local done = false
for i=1,#tl do
local l = tl[i]
local h = l.height or 0
local k = l.kern or 0
if k ~= 0 then
if h == 0 then
h = height + depth -- todo max
end
if not done then
count = count + 1 list[count] = tlcolor
done = true
end
count = count + 1 list[count] = push
count = count + 1 list[count] = { "offset", (k < 0 and k or 0), height - h }
count = count + 1 list[count] = rulecache[h][0][abs(k)]
count = count + 1 list[count] = pop
end
end
if done then
count = count + 1 list[count] = black
end
end
end
if count > 0 then
local commands = character.commands
if commands then
character.commands = appendcommandtable(commands,list)
else
list[#list+1] = charcommand[unicode]
character.commands = list
end
end
end
end
end
end
end
local specification = {
name = "staircase",
description = "show staircase kerns",
-- position = 1,
manipulators = {
base = initialize,
node = initialize,
}
}
registerotffeature(specification)
registerafmfeature(specification)
|
