mp-miss.mpxl /size: 2506 b    last modification: 2021-10-28 13:50
1%D \module
2%D   [       file=mp-miss.mpiv,
3%D        version=2021.02.01,
4%D          title=\CONTEXT\ \METAPOST\ graphics,
5%D       subtitle=missing glyphs,
6%D         author=Hans Hagen,
7%D           date=\currentdate,
8%D      copyright={PRAGMA ADE \& \CONTEXT\ Development Team}]
9%C
10%C This module is part of the \CONTEXT\ macro||package and is
11%C therefore copyrighted by \PRAGMA. See mreadme.pdf for
12%C details.
13
14if known metafun_loaded_miss : endinput ; fi ;
15
16newinternal boolean metafun_loaded_miss ; metafun_loaded_miss := true ; immutable metafun_loaded_miss ;
17
18picture MissingSnippets[][];
19
20vardef MissingGlyphSymbol(expr w, h, d) =
21    image (
22        draw (0,-d)--(w,-d)--(w,h)--(0,h)--cycle ;
23        if d <> 0 : draw (0,0)--(w,0) ;
24    )
25enddef ;
26
27vardef MissingLowercase   = image ( draw MissingGlyphSymbol(.45, .55,  .20) scaled 1000 ; ) enddef ;
28vardef MissingUppercase   = image ( draw MissingGlyphSymbol(.65, .70,  .25) scaled 1000 ; ) enddef ;
29vardef MissingMark        = image ( draw MissingGlyphSymbol(.15, .70, -.50) scaled 1000 ; ) enddef ;
30vardef MissingPunctuation = image ( draw MissingGlyphSymbol(.15, .55,  .20) scaled 1000 ; ) enddef ;
31vardef MissingUnknown     = image ( draw MissingGlyphSymbol(.45, .20,    0) scaled 1000 ; ) enddef ;
32
33% vardef MissingGlyph =
34%     pickup pencircle scaled 0.05 ;
35%     composeglyph(MissingSnippets[getparameterdefault "mpsfont" "namespace" 1]) ;
36% enddef ;
37
38vardef MissingGlyph =
39    save u ; u := getparameterdefault "mpsfont" "unicode" 1;
40    save s ; s := getparameterdefault "mpsfont" "scale" 1 ;
41    save n ; n := getparameterdefault "mpsfont" "namespace" 1 ;
42    save i ; i := getparameterdefault "mpsfont" "slant" 0 ;
43    save w ; w := getparameterdefault "mpsfont" "weight" 1 ;
44    pickup pencircle scaled (0.05 * w) ;
45    MissingSnippets[n][u] := image (
46        draw scantokens ( getparameter "mpsfont" "shapes" (1) "shape" )
47            withcolor getparameter "mpsfont" "shapes" (1) "color"
48    ) scaled s slanted i ;
49    registercomposedglyph(u, MissingSnippets[n]) ;
50enddef ;
51
52lmt_registerglyphs [
53    name   = "missing",
54    units  =  1000,
55    width  =  100,
56    height =  100,
57    depth  =  0,
58] ;
59
60% we need to set up some basics (signals to the backend and such) at definition
61% time so we just force a bogus shape (zero)
62
63lmt_registerglyph [
64    category = "missing",
65] ;
66
67permanent MissingSnippets, MissingGlyphSymbol, MissingLowercase, MissingUppercase,
68    MissingMark, MissingPunctuation, MissingUnknown, MissingGlyph ;
69