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-- 
--  This is file `luaotfload.lua',
--  generated with the docstrip utility.
-- 
--  The original source files were:
-- 
--  luaotfload.dtx  (with options: `lua')
--  This is a generated file.
--  
--  Copyright (C) 2009-2010 by by Elie Roux    <elie.roux@telecom-bretagne.eu>
--                            and Khaled Hosny <khaledhosny@eglug.org>
--  
--  This work is under the CC0 license.
--  
--  This work consists of the main source file luaotfload.dtx
--  and the derived files
--      luaotfload.sty, luaotfload.lua
--  
module('luaotfload', package.seeall)

luaotfload.module = {
    name          = "luaotfload",
    version       = 1.13,
    date          = "2010/06/24",
    description   = "ConTeXt font loading system.",
    author        = "Elie Roux & Hans Hagen",
    copyright     = "Elie Roux",
    license       = "CC0"
}

luatexbase.provides_module(luaotfload.module)


local format = string.format

local function log(...)
    luatexbase.module_log    ('luaotfload', format(...))
end

local function error(...)
    luatexbase.module_error  ('luaotfload', format(...))
end

local function warning(...)
    luatexbase.module_warning('luaotfload', format(...))
end


local luatex_version = 60

if tex.luatexversion < luatex_version then
    warning('LuaTeX v%.2f is old, v%.2f is recommended.',
             tex.luatexversion/100,
             luatex_version   /100)
end


function luaotfload.loadmodule(name)
    local tofind = 'otfl-'..name
    local found = kpse.find_file(tofind,"tex")
    if found then
        log('loading file %s.', found)
        dofile(found)
    else
        error('file %s not found.', tofind)
    end
end


luaotfload.loadmodule('luat-dum.lua') -- not used in context at all
luaotfload.loadmodule('luat-ovr.lua') -- override some luat-dum functions
luaotfload.loadmodule('data-con.lua') -- maybe some day we don't need this one


tex.attribute[0] = 0


luaotfload.loadmodule('font-ini.lua')
luaotfload.loadmodule('node-dum.lua')
luaotfload.loadmodule('node-inj.lua')


function attributes.private(name)
    local attr   = 'otfl@' .. name
    local number = luatexbase.attributes[attr]
    if not number then
        number = luatexbase.new_attribute(attr)
    end
    return number
end


luaotfload.loadmodule('font-tfm.lua')
luaotfload.loadmodule('font-cid.lua')
luaotfload.loadmodule('font-ott.lua')
luaotfload.loadmodule('font-map.lua')
luaotfload.loadmodule('font-otf.lua')
luaotfload.loadmodule('font-otd.lua')
luaotfload.loadmodule('font-oti.lua')
luaotfload.loadmodule('font-otb.lua')
luaotfload.loadmodule('font-otn.lua')
luaotfload.loadmodule('font-ota.lua')
luaotfload.loadmodule('font-otc.lua')
luaotfload.loadmodule('font-def.lua')
luaotfload.loadmodule('font-xtx.lua')
luaotfload.loadmodule('font-dum.lua')


luaotfload.loadmodule('font-nms.lua')
luaotfload.loadmodule('font-clr.lua')

local function def_font(...)
    local fontdata = fonts.define.read(...)
    if type(fontdata) == "table" and fontdata.shared then
        local capheight
        local units     = fontdata.units
        local size      = fontdata.size
        local otfdata   = fontdata.shared.otfdata

        if otfdata.pfminfo.os2_capheight > 0 then
            capheight = otfdata.pfminfo.os2_capheight / units * size
        else
            if fontdata.characters[string.byte("X")] then
                capheight = fontdata.characters[string.byte("X")].height
            else
                capheight = otfdata.metadata.ascent / units * size
            end
        end
        fontdata.parameters[8] = capheight
        if otfdata.metadata.math then
            for k,v in next, otfdata.metadata.math do
                if k == "RadicalDegreeBottomRaisePercent" then
                    -- this is a percent
                    fontdata.MathConstants[k] = v
                else
                    fontdata.MathConstants[k] = v / units * size
                end
            end
        end

    end
    return fontdata
end

fonts.mode = "node"


function luaotfload.register_callbacks()
    luatexbase.add_to_callback('pre_linebreak_filter',
                                nodes.simple_font_handler,
                               'luaotfload.pre_linebreak_filter')
    luatexbase.add_to_callback('hpack_filter',
                                nodes.simple_font_handler,
                               'luaotfload.hpack_filter')
    luatexbase.reset_callback('define_font')
    luatexbase.add_to_callback('define_font',
                                def_font,
                               'luaotfload.define_font', 1)
    luatexbase.add_to_callback('find_vf_file',
                                fonts.vf.find,
                               'luaotfload.find_vf_file')
end

function luaotfload.unregister_callbacks()
    luatexbase.remove_from_callback('pre_linebreak_filter',
                                    'luaotfload.pre_linebreak_filter')
    luatexbase.remove_from_callback('hpack_filter',
                                    'luaotfload.hpack_filter')
    luatexbase.remove_from_callback('define_font',
                                    'luaotfload.define_font')
    luatexbase.remove_from_callback('find_vf_file',
                                     'luaotfload.find_vf_file')
end
-- 
--  End of File `luaotfload.lua'.