From d20186dc4653791d1ebb8eb4be9c05716879686f Mon Sep 17 00:00:00 2001
From: Philipp Gesang <phg@phi-gamma.net>
Date: Thu, 12 May 2016 20:09:38 +0200
Subject: [fontloader] import new AFM loader directly from Hans
---
src/fontloader/misc/fontloader-font-one.lua | 382 ++++++++++++++++------------
1 file changed, 216 insertions(+), 166 deletions(-)
diff --git a/src/fontloader/misc/fontloader-font-one.lua b/src/fontloader/misc/fontloader-font-one.lua
index af32463..b2446db 100644
--- a/src/fontloader/misc/fontloader-font-one.lua
+++ b/src/fontloader/misc/fontloader-font-one.lua
@@ -87,143 +87,6 @@ and <l n='otf'/> reader.</p>
-- Comment DELIM 2390 1010
-- Comment AXISHEIGHT 250
-local comment = P("Comment")
-local spacing = patterns.spacer -- S(" \t")^1
-local lineend = patterns.newline -- S("\n\r")
-local words = spacing * C((1 - lineend)^1)
-local number = spacing * C((R("09") + S("."))^1) / tonumber * spacing^0
-local data = Carg(1)
-local plus = P("plus") * number
-local minus = P("minus") * number
-
-local pattern = ( -- needs testing ... not used anyway as we no longer need math afm's
- comment * spacing * (
- data * (
- ("CODINGSCHEME" * words ) / function(t,a) end +
- ("DESIGNSIZE" * number * words ) / function(t,a) t[ 1] = a end +
- ("CHECKSUM" * number * words ) / function(t,a) t[ 2] = a end +
- ("SPACE" * number * plus * minus ) / function(t,a,b,c) t[ 3], t[ 4], t[ 5] = a, b, c end +
- ("QUAD" * number ) / function(t,a) t[ 6] = a end +
- ("EXTRASPACE" * number ) / function(t,a) t[ 7] = a end +
- ("NUM" * number * number * number ) / function(t,a,b,c) t[ 8], t[ 9], t[10] = a, b, c end +
- ("DENOM" * number * number ) / function(t,a,b) t[11], t[12] = a, b end +
- ("SUP" * number * number * number ) / function(t,a,b,c) t[13], t[14], t[15] = a, b, c end +
- ("SUB" * number * number ) / function(t,a,b) t[16], t[17] = a, b end +
- ("SUPDROP" * number ) / function(t,a) t[18] = a end +
- ("SUBDROP" * number ) / function(t,a) t[19] = a end +
- ("DELIM" * number * number ) / function(t,a,b) t[20], t[21] = a, b end +
- ("AXISHEIGHT" * number ) / function(t,a) t[22] = a end
- )
- + (1-lineend)^0
- )
- + (1-comment)^1
-)^0
-
-local function scan_comment(str)
- local fd = { }
- lpegmatch(pattern,str,1,fd)
- return fd
-end
-
--- Comment DesignSize 12 (pts)
--- Comment TFM designsize: 12 (in points)
-
-local keys = {
-
- FontName = function(data,line)
- data.metadata.fontname = strip(line) -- get rid of spaces
- data.metadata.fullname = strip(line)
- end,
-
- ItalicAngle = function(data,line)
- data.metadata.italicangle = tonumber(line)
- end,
-
- IsFixedPitch = function(data,line)
- data.metadata.monospaced = toboolean(line,true)
- end,
-
- CharWidth = function(data,line)
- data.metadata.charwidth = tonumber(line)
- end,
-
- XHeight = function(data,line)
- data.metadata.xheight = tonumber(line)
- end,
-
- Descender = function(data,line)
- data.metadata.descender = tonumber (line)
- end,
-
- Ascender = function(data,line)
- data.metadata.ascender = tonumber (line)
- end,
-
- Comment = function(data,line)
- line = lower(line)
- local designsize = match(line,"designsize[^%d]*(%d+)")
- if designsize then data.metadata.designsize = tonumber(designsize) end
- end,
-
-}
-
-local function get_charmetrics(data,charmetrics,vector)
- local characters = data.characters
- local chr, ind = { }, 0
- for k, v in gmatch(charmetrics,"([%a]+) +(.-) *;") do
- if k == 'C' then
- v = tonumber(v)
- if v < 0 then
- ind = ind + 1 -- ?
- else
- ind = v
- end
- chr = {
- index = ind
- }
- elseif k == 'WX' then
- chr.width = tonumber(v)
- elseif k == 'N' then
- characters[v] = chr
- elseif k == 'B' then
- local llx, lly, urx, ury = match(v,"^ *(.-) +(.-) +(.-) +(.-)$")
- chr.boundingbox = { tonumber(llx), tonumber(lly), tonumber(urx), tonumber(ury) }
- elseif k == 'L' then
- local plus, becomes = match(v,"^(.-) +(.-)$")
- local ligatures = chr.ligatures
- if ligatures then
- ligatures[plus] = becomes
- else
- chr.ligatures = { [plus] = becomes }
- end
- end
- end
-end
-
-local function get_kernpairs(data,kernpairs)
- local characters = data.characters
- for one, two, value in gmatch(kernpairs,"KPX +(.-) +(.-) +(.-)\n") do
- local chr = characters[one]
- if chr then
- local kerns = chr.kerns
- if kerns then
- kerns[two] = tonumber(value)
- else
- chr.kerns = { [two] = tonumber(value) }
- end
- end
- end
-end
-
-local function get_variables(data,fontmetrics)
- for key, rest in gmatch(fontmetrics,"(%a+) *(.-)[\n\r]") do
- local keyhandler = keys[key]
- if keyhandler then
- keyhandler(data,rest)
- end
- end
-end
-
--[[ldx--
<p>We now use a new (unfinished) pfb loader but I see no differences between the old
and new vectors (we actually had one bad vector with the old loader).</p>
@@ -353,6 +216,196 @@ do
end
+--[[ldx--
+<p>We start with the basic reader which we give a name similar to the built in <l n='tfm'/>
+and <l n='otf'/> reader.</p>
+--ldx]]--
+
+-- Comment FONTIDENTIFIER LMMATHSYMBOLS10
+-- Comment CODINGSCHEME TEX MATH SYMBOLS
+-- Comment DESIGNSIZE 10.0 pt
+-- Comment CHECKSUM O 4261307036
+-- Comment SPACE 0 plus 0 minus 0
+-- Comment QUAD 1000
+-- Comment EXTRASPACE 0
+-- Comment NUM 676.508 393.732 443.731
+-- Comment DENOM 685.951 344.841
+-- Comment SUP 412.892 362.892 288.889
+-- Comment SUB 150 247.217
+-- Comment SUPDROP 386.108
+-- Comment SUBDROP 50
+-- Comment DELIM 2390 1010
+-- Comment AXISHEIGHT 250
+-- Comment DesignSize 12 (pts)
+-- Comment TFM designsize: 12 (in points)
+
+local parser do -- no need for a further speedup with locals
+
+ local spacing = patterns.spacer
+ local lineend = patterns.newline
+ local number = spacing * (R("09") + S("."))^1 / tonumber
+ local name = spacing * C((1-spacing)^1)
+ local words = spacing * (1 - lineend)^1 / strip
+ local rest = (1 - lineend)^0
+ local fontdata = Carg(1)
+ local semicolon = spacing * P(";")
+ local plus = P("plus") * number
+ local minus = P("minus") * number
+
+ -- kern pairs
+
+ local function addkernpair(data,one,two,value)
+ local chr = data.characters[one]
+ if chr then
+ local kerns = chr.kerns
+ if kerns then
+ kerns[two] = tonumber(value)
+ else
+ chr.kerns = { [two] = tonumber(value) }
+ end
+ end
+ end
+
+ local p_kernpair = (fontdata * P("KPX") * name * name * number) / addkernpair
+
+ -- char metrics
+
+ local chr = false
+ local ind = 0
+
+ local function start()
+ ind = 0
+ chr = { }
+ end
+
+ local function stop()
+ ind = 0
+ chr = false
+ end
+
+ local function setindex(i)
+ if i < 0 then
+ ind = ind + 1 -- ?
+ else
+ ind = i
+ end
+ chr = {
+ index = ind
+ }
+ end
+
+ local function setwidth(width)
+ chr.width = width
+ end
+
+ local function setname(data,name)
+ data.characters[name] = chr
+ end
+
+ local function setboundingbox(boundingbox)
+ chr.boundingbox = boundingbox
+ end
+
+ local function setligature(plus,becomes)
+ local ligatures = chr.ligatures
+ if ligatures then
+ ligatures[plus] = becomes
+ else
+ chr.ligatures = { [plus] = becomes }
+ end
+ end
+
+ local p_charmetric = ( (
+ P("C") * number / setindex
+ + P("WX") * number / setwidth
+ + P("N") * fontdata * name / setname
+ + P("B") * Ct((number)^4) / setboundingbox
+ + P("L") * (name)^2 / setligature
+ ) * semicolon )^1
+
+ local p_charmetrics = P("StartCharMetrics") * number * (p_charmetric + (1-P("EndCharMetrics")))^0 * P("EndCharMetrics")
+ local p_kernpairs = P("StartKernPairs") * number * (p_kernpair + (1-P("EndKernPairs")) )^0 * P("EndKernPairs")
+
+ local function set_1(data,key,a) data.metadata[lower(key)] = a end
+ local function set_2(data,key,a,b) data.metadata[lower(key)] = { a, b } end
+ local function set_3(data,key,a,b,c) data.metadata[lower(key)] = { a, b, c } end
+
+ local p_parameters = P(false)
+ + P("FontName") * fontdata * words / function(data,line)
+ data.metadata.fontname = line
+ data.metadata.fullname = line
+ end
+ + P("ItalicAngle") * fontdata * number / function(data,angle)
+ data.metadata.italicangle = angle
+ end
+ + P("IsFixedPitch") * fontdata * name / function(data,pitch)
+ data.metadata.monospaced = toboolean(pitch,true)
+ end
+ + P("CharWidth") * fontdata * number / function(data,width)
+ data.metadata.charwidth = width
+ end
+ + P("XHeight") * fontdata * number / function(data,xheight)
+ data.metadata.xheight = xheight
+ end
+ + P("Descender") * fontdata * number / function(data,descender)
+ data.metadata.descender = descender
+ end
+ + P("Ascender") * fontdata * number / function(data,ascender)
+ data.metadata.ascender = ascender
+ end
+ + P("Comment") * spacing * ( P(false)
+ + (fontdata * C("DESIGNSIZE") * number * rest) / set_1 -- 1
+ + (fontdata * C("TFM designsize") * number * rest) / set_1
+ + (fontdata * C("DesignSize") * number * rest) / set_1
+ + (fontdata * C("CODINGSCHEME") * words * rest) / set_1 --
+ + (fontdata * C("CHECKSUM") * number * words * rest) / set_1 -- 2
+ + (fontdata * C("SPACE") * number * plus * minus * rest) / set_3 -- 3 4 5
+ + (fontdata * C("QUAD") * number * rest) / set_1 -- 6
+ + (fontdata * C("EXTRASPACE") * number * rest) / set_1 -- 7
+ + (fontdata * C("NUM") * number * number * number * rest) / set_3 -- 8 9 10
+ + (fontdata * C("DENOM") * number * number * rest) / set_2 -- 11 12
+ + (fontdata * C("SUP") * number * number * number * rest) / set_3 -- 13 14 15
+ + (fontdata * C("SUB") * number * number * rest) / set_2 -- 16 17
+ + (fontdata * C("SUPDROP") * number * rest) / set_1 -- 18
+ + (fontdata * C("SUBDROP") * number * rest) / set_1 -- 19
+ + (fontdata * C("DELIM") * number * number * rest) / set_2 -- 20 21
+ + (fontdata * C("AXISHEIGHT") * number * rest) / set_1 -- 22
+ )
+
+ parser = (P("StartFontMetrics") / start)
+ * (
+ p_charmetrics
+ + p_kernpairs
+ + p_parameters
+ + (1-P("EndFontMetrics"))
+ )^0
+ * (P("EndFontMetrics") / stop)
+
+end
+
+
+local data = {
+ resources = {
+ filename = resolvers.unresolve(filename),
+-- version = afm.version,
+ creator = "context mkiv",
+ },
+ properties = {
+ hasitalics = false,
+ },
+ goodies = {
+ },
+ metadata = {
+ filename = file.removesuffix(file.basename(filename))
+ },
+ characters = {
+ -- a temporary store
+ },
+ descriptions = {
+ -- the final store
+ },
+}
+
local function readafm(filename)
local ok, afmblob, size = resolvers.loadbinfile(filename) -- has logging
if ok and afmblob then
@@ -377,30 +430,7 @@ local function readafm(filename)
-- the final store
},
}
--- afmblob = gsub(afmblob,"StartCharMetrics(.-)EndCharMetrics", function(charmetrics)
- for charmetrics in gmatch(afmblob,"StartCharMetrics(.-)EndCharMetrics") do
- if trace_loading then
- report_afm("loading char metrics")
- end
- get_charmetrics(data,charmetrics,vector)
- break
- end
- for kernpairs in gmatch(afmblob,"StartKernPairs(.-)EndKernPairs") do
- if trace_loading then
- report_afm("loading kern pairs")
- end
- get_kernpairs(data,kernpairs)
- break
- end
- for version, fontmetrics in gmatch(afmblob,"StartFontMetrics%s+([%d%.]+)(.-)EndFontMetrics") do
- if trace_loading then
- report_afm("loading variables")
- end
- data.afmversion = version
- get_variables(data,fontmetrics)
- data.fontdimens = scan_comment(fontmetrics) -- todo: all lpeg, no time now
- break
- end
+ lpegmatch(parser,afmblob,1,data)
return data
else
if trace_loading then
@@ -929,11 +959,31 @@ local function copytotfm(data)
end
--
end
- local fd = data.fontdimens
- if fd and fd[8] and fd[9] and fd[10] then -- math
- for k,v in next, fd do
- parameters[k] = v
- end
+ --
+ if metadata.sup then
+ local dummy = { 0, 0, 0}
+ parameters[ 1] = metadata.designsize or 0
+ parameters[ 2] = metadata.checksum or 0
+ parameters[ 3],
+ parameters[ 4],
+ parameters[ 5] = unpack(metadata.space or dummy)
+ parameters[ 6] = metadata.quad or 0
+ parameters[ 7] = metadata.extraspace or 0
+ parameters[ 8],
+ parameters[ 9],
+ parameters[10] = unpack(metadata.num or dummy)
+ parameters[11],
+ parameters[12] = unpack(metadata.denom or dummy)
+ parameters[13],
+ parameters[14],
+ parameters[15] = unpack(metadata.sup or dummy)
+ parameters[16],
+ parameters[17] = unpack(metadata.sub or dummy)
+ parameters[18] = metadata.supdrop or 0
+ parameters[19] = metadata.subdrop or 0
+ parameters[20],
+ parameters[21] = unpack(metadata.delim or dummy)
+ parameters[22] = metadata.axisheight
end
--
parameters.designsize = (metadata.designsize or 10)*65536
--
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