%D \module
%D   [      file=s-fonts-outlines,
%D        version=2024.01.05,
%D          title=\CONTEXT\ Style File,
%D       subtitle=Showing Outlines,
%D         author=Hans Hagen,
%D           date=\currentdate,
%D      copyright={PRAGMA ADE \& \CONTEXT\ Development Team}]
%C
%C This module is part of the \CONTEXT\ macro||package and is
%C therefore copyrighted by \PRAGMA. See mreadme.pdf for
%C details.

%D This module is mostly used for debugging a font and might evolve accordingly. The
%D current interface is minimalistic. It was made when debugging some cff issues with
%D old type one fonts that we needed to support.
%D
%D Processing all fonts on my disk results in some 2500 pages and the highest memory
%D usage I ever encountered with \LUAMETATEX: when we start with an empty cache we
%D need some 30 GB and for a final run more than 10; much relates to \LUA\ allocating
%D beforehand (doubling table memory as they grow) and garbage collection.

\startbuffer[samplefonttext]
    a\\b\\c\\d\\e\\f\\g\\h\\i\\j\\k\\l\\m\\n\\o\\p\\q\\r\\s\\t\\u\\v\\w\\x\\y\\z\crlf
    A\\B\\C\\D\\E\\F\\G\\H\\I\\J\\K\\L\\M\\N\\O\\P\\Q\\R\\S\\T\\U\\V\\W\\X\\Y\\Z\crlf
    @\\1\\2\\3\\4\\5\\6\\7\\8\\9\\0\\(\\)\\[\\]\\\{\\\}\\&\\+\\-\\=\\<\\>\\%
    \textslash\\\textbackslash\\\texthash\\\textpercent\\_\\-\\*\\!\\?\\,\\.\\:\\;%
\stopbuffer

\startbuffer[samplefont]
    \framed
      [offset=overlay,
       frame=off,
       align=middle]
      {\def\\{\kern.2\emwidth}%
       \getbuffer[samplefonttext]}%
\stopbuffer

\startMPdefinitions

presetparameters "samplefont" [
    name   = "",
    labels = false,
    buffer = "samplefont"
] ;

def lmt_samplefont = applyparameters "samplefont" "lmt_do_samplefont" enddef ;

vardef lmt_do_samplefont =
    image (
        pushparameters "samplefont" ;

        save sample ; string sample ; sample := "\getbuffer[" & (getparameter "buffer") & "]" ;
        save banner ; string banner ; banner := "\strut\tttf " & (getparameter "name") ;

        save p ; picture p[] ;

        p[1] := lmt_outline [ text = sample ] ;
        p[2] := textext(sample) ;
        p[3] := textext.ulft(banner) ;

        p[1] := (p[1] shifted - center p[1]) scaled 20 ;
        p[2] := (p[2] shifted - center p[2]) scaled 20 ;
        p[3] :=  p[3]                        scaled  4 ;

        save c ; string c[] ;

        c[1] := "middlered"   ; c[4] := "middlemagenta" ;
        c[2] := "middlegreen" ; c[5] := "middlecyan"    ;
        c[3] := "middleblue"  ; c[6] := "middleyellow"  ;

        save n ; numeric n ; n := 1 ;

        for i within p[1] :
            drawpath pathpart i ;
            drawpoints pathpart i withcolor c[n] ;
            n := if n == 6 : 1 else : n + 1 fi ;
        endfor ;

        if (getparameter "labels") :

            save defaultfont  ; string  defaultfont  ; defaultfont  := "Mono" ;
            save defaultscale ; numeric defaultscale ; defaultscale := .4 ;

            c[1] := "darkred"   ; c[4] := "darkmagenta" ;
            c[2] := "darkgreen" ; c[5] := "darkcyan"    ;
            c[3] := "darkblue"  ; c[6] := "darkyellow"  ;

            n := 1 ;

            for i within p[1] :
                drawpointlabels pathpart i withcolor c[n] ;
                n := if n == 6 : 1 else : n + 1 fi ;
            endfor ;

        fi ;

        draw p[2]
            shifted (0,-1.1*bbheight(p2)) ;

        draw p[3]
            shifted urcorner currentpicture ;

        popparameters ;
    )
enddef ;

\stopMPdefinitions

\starttexdefinition protected samplefont[#1]
    \begingroup
        \getdummyparameters[name=dejavuserif.otf,buffer=samplefont,labels=no,#1]
        \writestatus{fontfile}{\dummyparameter{name}}
        \definedfont[\dummyparameter{name}]
        \iffontchar\font`a\relax
            \startMPpage[offset=2ts]
                draw lmt_samplefont [
                    buffer = "\dummyparameter{buffer}",
                    name   = "\dummyparameter{name}",
                    labels = \ifcstok{\dummyparameter{labels}}{yes}true\else false\fi
                ] ;
            \stopMPpage
        \else
            \writestatus{fontfile}{\dummyparameter{name} has no 'a'}
        \fi
    \endgroup
\stoptexdefinition

\continueifinputfile{s-fonts-outlines.mkxl}

% \enabledirectives[fonts.cff.flatten]

\starttext
% \disabledirectives[fonts.streams.pack]
% \enabletrackers[fonts.cff.charstrings]
% \samplefont[name=gentiumbookplusitalic.ttf,labels=yes] % missing contours
% \samplefont[name=lmr10.afm,labels=yes]
% \samplefont[name=ibmplexmath.otf]
\samplefont[name=sab.afm]
\samplefont[name=creditsuissetyperoman.ttf]
\samplefont[name=calibri.ttf]
% \samplefont[name=lmmonoprop10-regular.otf]
% \samplefont[name=texgyrepagella-regular.otf]
% \samplefont[name=lmmonoltcond10-regular.otf]
% \samplefont[name=lmsans10-boldoblique.otf]
% \samplefont[name=sourcecodevariableitalic.otf]
% \samplefont[name=sourcecodevariableroman.otf]
% \samplefont[name=sourcehansansextralight.otf]
% \samplefont[name=notosanscjkkrlight.otf]
% \samplefont[name=notosanscjkscdemilight.otf]
% \samplefont[name=notosanscjktclight.otf]
% \samplefont[name=dfminchopstdw5.otf]
\stoptext

%D I might look into some of the crashes but some of these fonts are experimental
%D and might be produced manually. Also some are plain ugly due to their state of
%D development, but it's what I had to test at some point, so they stuck around and
%D I have no motivation to sort out the mess.

\starttext

\startluacode
    local todo = {

        ["adobeblank.otf"]                  = "useless",
        ["adobeblank2.otf"]                 = "useless",
        ["lastresort.ttf"]                  = "useless",

        ["sourcecodevariableitalic.otf"]    = "crash",
        ["sourcecodevariableroman.otf"]     = "crash",
        ["sourcehansansextralight.otf"]     = "crash",
        ["sourceserif4displaylight.otf"]    = "crash",
        ["notosanscjkkrlight.otf"]          = "crash",
        ["notosanscjkscdemilight.otf"]      = "crash",
        ["notosanscjktclight.otf"]          = "crash",
        ["junicodetwobetaregularvf.otf"]    = "crash",
        ["junicodetwobetabold.otf"]         = "crash",
        ["dfminchopstdw5.otf"]              = "crash",
        ["alegreyasansthin.otf"]            = "crash",
        ["alegreyasansthinitalic.otf"]      = "crash",


        ["lte52172.ttf"]                    = "crash",
        ["avkv.ttf"]                        = "crash",
        ["tirekv.ttf"]                      = "crash",

        ["bhb.afm"]                         = "crash",
        ["bhd.afm"]                         = "crash",
        ["bhh.afm"]                         = "crash",
        ["bhl.afm"]                         = "crash",
        ["bhm.afm"]                         = "crash",
        ["a.afm"]                           = "crash",
        ["myriadmmitweight400width600.afm"] = "crash",
        ["myriadmmitweight700width600.afm"] = "crash",
        ["myriadmmweight400width600.afm"]   = "crash",
        ["myriadmmweight700width600.afm"]   = "crash",

    }

    local skip = {
        ["^arial"]    = "bugged",
        ["^myriad"]   = "bugged",
        ["^junicode"] = "bugged",
        ["^noto"]     = "big",
        ["^source"]   = "big",
        ["^amiri"]    = "bugged",
    }

    local function isbad(name)
        if todo[name] then
            return todo[name]
        else
            for k, v in next, skip do
                if string.find(name,k) then
                    return v
                end
            end
        end
        return false
    end

    fonts.names.load()
    local data = fonts.names.data
    for k, v in table.sortedhash(data.files) do
        local bad = isbad(k)
        if bad then
            context.writestatus("fontfile","skipping '" .. k .. "' : " .. bad)
        else
            local s = string.lower(file.suffix(k))
            if s == "otf" or s == "ttf" or s == "afm" then
         -- if s == "otf" then
         -- if s == "ttf" then
         -- if s == "afm" then
                context.showsampleFont { name = k }
            end
        end
    end
\stopluacode

\stoptext