67 lines
2.1 KiB
Lua
67 lines
2.1 KiB
Lua
-- This is serializet2.lua.
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-- Copyright 2019 Marcel Krüger <tex@2krueger.de>
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--
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-- This work may be distributed and/or modified under the
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-- conditions of the LaTeX Project Public License version 1.3c.
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-- The full text of this version can be found at
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-- http://www.latex-project.org/lppl/lppl-1-3c.txt
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--
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-- This work has the LPPL maintenance status `maintained'
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--
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-- The Current Maintainer of this work is Marcel Krüger.
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--
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-- This work consists of the files buildcffwrapper.lua, buildotfwrapper.lua,
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-- finish_pdffont.lua, finisht3.lua, glyph2char.lua, libSfnt.lua,
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-- luaglyphlist.lua, luaotfprovider.lua, make_extensible_per_char.lua,
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-- mpfont.lua, mplibtolist.lua, mplibtot2.lua, mpnodelib.lua,
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-- mt1_fontloader.lua, nodebuilder.lua, optimizet2.lua, serializet2.lua.
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local pack = string.pack
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local optimizet2 = require'luametalatex-font-t2-opt'
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local function numbertot2(n)
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if math.abs(n) > 2^15 then
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error[[Number too big]]
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end
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local num = math.floor(n + .5)
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if n ~= 0 and math.abs((num-n)/n) > 0.001 then
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num = math.floor(n * 2^16 + 0.5)
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return pack(">Bi4", 255, math.floor(n * 2^16 + 0.5))
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elseif num >= -107 and num <= 107 then
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return string.char(num + 139)
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elseif num >= 108 and num <= 1131 then
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return pack(">I2", num+0xF694) -- -108+(247*0x100)
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elseif num >= -1131 and num <= -108 then
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return pack(">I2", -num+0xFA94) -- -108+(251*0x100)
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else
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return pack(">Bi2", 28, num)
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end
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end
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local function convert_cs(cs, upem)
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local cs_parts = {}
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local function add(cmd, first, ...)
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if cmd == 19 or cmd == 20 then
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cs_parts[#cs_parts+1] = string.char(cmd)
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cs_parts[#cs_parts+1] = first
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return
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end
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if first then
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cs_parts[#cs_parts+1] = numbertot2(first*upem/1000)
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return add(cmd, ...)
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end
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if cmd then
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if cmd < 0 then
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cs_parts[#cs_parts+1] = string.char(12, -cmd-1)
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else
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cs_parts[#cs_parts+1] = string.char(cmd)
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end
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end
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end
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for _, args in ipairs(cs) do if args then add(table.unpack(args)) end end
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return table.concat(cs_parts)
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end
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return function(cs, upem, raw)
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if not raw then optimizet2(cs) end
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return convert_cs(cs, upem or 1000)
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end
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