[luatex] an issue with \rpcode
Hans Hagen
pragma at wxs.nl
Sun Oct 12 14:01:01 CEST 2014
> On 10/12/2014 1:49 PM, luigi scarso wrote:
I'll add support for this:
\directlua{fonts.constructors.cacheintex = false}
(only useful for generic usage)
> On Sun, Oct 12, 2014 at 1:38 PM, Hans Hagen <pragma at wxs.nl
> <mailto:pragma at wxs.nl>> wrote:
>
> On 10/11/2014 5:07 PM, Mittelbach, Frank wrote:
>
> while trying to make Taco's linebreaker code I came across some
> behavior
> that I found rather weird
>
> in essense it looks as if \rpcode is not ending up in the char table
> unless \lpcode for the same char is set first (and non-zero)
>
> \pdfprotrudechars=1
>
> %\lpcode\font 50 = 1
> \rpcode\font 50 = 200
> \efcode\font 50 = 333
>
> \directlua{
> local function FMItable (name,t)
> print ("---- looking at table ", name, tostring(t))
> for k, v in pairs(t) do
> print(" ", k,"=", tostring(v))
> end
> print("----------------")
> end
> FMItable("char 50",font.fonts[font.current()]__.characters[50])
> }
>
> \bye
>
> --------------------
>
> if you uncomment the lpcode line then both values show up. But
> what is
> puzzling me even more is that if I change the values and then
> run this
> directlua bit again, nothing changes (could of course be that I
> should
> define FMItable differently but ...
>
> anybody any clue?
>
>
> sure .. the table that you see is a cached one and if you change a
> rp value after the font definition it is not reflected in there
>
> see page 158 of luatex manual : cache field in passed tfm data tbale
>
> keep in mind that normally one will only set the protrusion values
> when a font is loaded because once a font is used they are frozen
>
> (currently these values are em related but at some point they might
> become glyph width related)
>
> \starttext
>
> \directlua{
> function
> fonts.constructors.__aftercopyingcharacters(target,__original)
> target.cache = "renew"
> end
> }
>
> \pdfprotrudechars=1
>
> \font\foo = LMRoman10-Regular*default,__quality at 12.3pt
>
> \foo
>
> \lpcode\foo 45 = 2000\relax
> \rpcode\foo 45 = 2000\relax
> \efcode\foo 45 = 4000\relax
>
> \directlua{
> print("data at tex end")
> inspect(font.fonts [font.current()].characters[__45])
> print("original passed data")
>
> inspect(fonts.hashes.__identifiers[font.current()].__characters[45])
> }
>
> test
>
> \stoptext
>
>
> with luatex-plain from contexst mkiv
> %%
> %% test-hans-1
> \directlua{
> function fonts.constructors.aftercopyingcharacters(target,original)
> target.cache = "renew"
> end
> }
>
> \pdfprotrudechars=1
>
> \font\foo = file:lmroman12-regular
> \foo
>
> \lpcode\foo 45 = 2000\relax
> \rpcode\foo 45 = 2000\relax
> \efcode\foo 45 = 4000\relax
>
> \directlua{
> print("data at tex end")
> inspect(font.fonts [font.current()].characters[45])
> print("original passed data")
> inspect(fonts.hashes.identifiers[font.current()].characters[45])
> }
>
> test
> \bye
>
>
>
>
>
> $ luatex --fmt=luatex-plain test-hans-1.tex
> This is LuaTeX, Version beta-0.79.1
> \write18 enabled.
> (./test-hans-1.tex
> (/opt/luatex/standalone-mkiv-new/tex/texmf-context/tex/generic/context/luatex/l
> uatex-basics.tex)
> (/opt/luatex/standalone-mkiv-new/tex/texmf-context/tex/generic/context/luatex/l
> uatex-fonts.tex <push namespace>
> </opt/luatex/standalone-mkiv-new/tex/texmf-cont
> ext/tex/generic/context/luatex/luatex-fonts-merged.lua>(using cache:
> /opt/luatex
> /standalone-mkiv-new/tex/texmf-cache/luatex-cache/generic)
> <luatex-fonts.lua loa
> ded in 0.051 seconds> <pop namespace>)
> (/opt/luatex/standalone-mkiv-new/tex/texmf-context/tex/generic/context/luatex/l
> uatex-math.tex(load luc:
> /opt/luatex/standalone-mkiv-new/tex/texmf-cache/luatex-
> cache/generic/fonts/otf/lmroman10-regular.luc)(load luc:
> /opt/luatex/standalone-
> mkiv-new/tex/texmf-cache/luatex-cache/generic/fonts/otf/lmroman7-regular.luc)(lo
> ad luc:
> /opt/luatex/standalone-mkiv-new/tex/texmf-cache/luatex-cache/generic/fon
> ts/otf/lmroman5-regular.luc)(load luc:
> /opt/luatex/standalone-mkiv-new/tex/texmf
> -cache/luatex-cache/generic/fonts/otf/lmmono10-regular.luc)(load luc:
> /opt/luate
> x/standalone-mkiv-new/tex/texmf-cache/luatex-cache/generic/fonts/otf/lmromanslan
> t10-regular.luc)(load luc:
> /opt/luatex/standalone-mkiv-new/tex/texmf-cache/luate
> x-cache/generic/fonts/otf/lmroman10-italic.luc)(load luc:
> /opt/luatex/standalone
> -mkiv-new/tex/texmf-cache/luatex-cache/generic/fonts/otf/lmroman10-bold.luc)(loa
> d luc:
> /opt/luatex/standalone-mkiv-new/tex/texmf-cache/luatex-cache/generic/font
> s/otf/lmroman10-bolditalic.luc)(load luc:
> /opt/luatex/standalone-mkiv-new/tex/te
> xmf-cache/luatex-cache/generic/fonts/otf/latinmodern-math.luc))
> (/opt/luatex/standalone-mkiv-new/tex/texmf-context/tex/generic/context/luatex/l
> uatex-languages.tex)
> (/opt/luatex/standalone-mkiv-new/tex/texmf-context/tex/generic/context/luatex/l
> uatex-mplib.tex)(load luc:
> /opt/luatex/standalone-mkiv-new/tex/texmf-cache/luate
> x-cache/generic/fonts/otf/lmroman12-regular..luc)data at tex end
> table={
> ["bot_accent"]=0,
> ["depth"]=0,
> ["expansion_factor"]=4000,
> ["height"]=191103,
> ["index"]=64,
> ["italic"]=0,
> ["left_protruding"]=2000,
> ["right_protruding"]=2000,
> ["top_accent"]=0,
> ["used"]=false,
> ["width"]=256377,
> }
> original passed data
> table={
> ["height"]=191102.976,
> ["index"]=64,
> ["width"]=256376.832,
> }
> [1{/opt/luatex/standalone-mkiv-
> new/tex/texmf/fonts/map/pdftex/plain/pdftex.map}])</opt/luatex/standalone-mkiv-n
> ew/tex/texmf/fonts/opentype/public/lm/lmroman10-regular.otf></opt/luatex/standal
> one-mkiv-new/tex/texmf/fonts/opentype/public/lm/lmroman12-regular.otf>
> Output written on test-hans-1.pdf (1 page, 5021 bytes).
> Transcript written on test-hans-1.log.
>
>
>
> --
> luigi
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