/usr/share/lilypond/2.16.2/fonts/source/feta-braces.mf is in lilypond-data 2.16.2-3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 | % Feta (not the Font-En-Tja) music font -- Staff braces
% This file is part of LilyPond, the GNU music typesetter.
%
% Copyright (C) 1997--2012 Han-Wen Nienhuys <hanwen@xs4all.nl>
% Jan Nieuwenhuizen <janneke@gnu.org>
%
% LilyPond is free software: you can redistribute it and/or modify
% it under the terms of the GNU General Public License as published by
% the Free Software Foundation, either version 3 of the License, or
% (at your option) any later version.
%
% LilyPond is distributed in the hope that it will be useful,
% but WITHOUT ANY WARRANTY; without even the implied warranty of
% MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
% GNU General Public License for more details.
%
% You should have received a copy of the GNU General Public License
% along with LilyPond. If not, see <http://www.gnu.org/licenses/>.
% We have to reduce the pixel-per-point value to
% support large brace glyphs in case we are using MetaPost
% (which by default sets `hppp' to 49.80244, regardless of
% the used `mag' value)
if known miterlimit:
bpppix_ := 0.2; % ten times larger than original
numeric mm, pt, dd, bp, cm, pc, cc, in;
mm * bpppix_ = 2.83464;
pt * bpppix_ = 0.99626;
dd * bpppix_ = 1.06601;
bp * bpppix_ = 1;
cm * bpppix_ = 28.34645;
pc * bpppix_ = 11.95517;
cc * bpppix_ = 12.79213;
in * bpppix_ = 72;
hppp := pt;
vppp := pt;
fi;
input feta-autometric;
input feta-macros;
staffsize# := 20 pt#; %% arbitrary
input feta-params;
%
% We must let the design increase for each font to make sure that mftrace
% doesn't jack up the resolution too highly for the longer braces.
%
fet_beginfont ("feta-braces-" & char (97 + font_count),
(font_count + 1) * 20, "fetaBraces");
mode_setup;
save code, braces_per_font;
code := 64;
braces_per_font := 64;
def draw_brace (expr height_sharp, width_sharp, slt_sharp, brace_number) =
save pendir, height, width, thin, thick, slt, pat;
save penangle;
pair pendir;
path pat;
height# := height_sharp;
width# := width_sharp;
slt# := slt_sharp;
fet_beginchar ("brace number " & decimal (brace_number),
"brace" & decimal (brace_number))
set_char_box (width#, 0, height# / 2, height# / 2);
define_pixels (height, width, slt);
thin = 2 slt;
thick = .5 width;
z2 = .5 [z1, z3];
y3l = y1 + height / 2;
x3 = x1 + width;
y1 = 0;
x1 = -b;
y0 = y1;
x0 = x1 - 2/6 thin;
pendir = unitvector (x3 - x1, y3l / 8 - y1);
penangle = angle pendir - 90;
penpos3 (thin, penangle);
penpos2 (thick, angle (z3 - z1) - 90);
penpos1 (-2 * (x0 - x1), penangle);
penlabels (1, 2, 3);
labels (0);
pat := z2r
.. simple_serif (z3r, z3l, 90)
.. z2l
.. z1l{dir (angle (z1r - z1l) - 90)}
.. z0{down}
.. z1r{-dir (angle (z1l - z1r) + 90)}
.. cycle;
pat := subpath (0, 5) of pat
-- subpath (6, 7) of pat
.. cycle;
fill pat;
fill pat yscaled -1;
fet_endchar;
enddef;
save linethickness;
save increment;
save last_brace_number;
save min_width;
save max_width;
save min_thin;
save max_thin;
linethickness := 0.5 pt#;
increment := 0.5 pt#;
last_brace_number := braces_per_font * 9 - 1;
min_width := 2 pt#;
max_width := 20 pt#;
min_thin := 0.2 pt#;
max_thin := 1.25 pt#;
y := 10 pt#;
for i := 0 step 1 until font_count:
save number;
number := braces_per_font * i;
for j := 0 step 1 until (braces_per_font - 1):
% message "l: "&decimal l;
% note: define_pixels (x) multiplies x by hppp,
% must never get bigger than infinity
y := y + increment;
if y > infinity / hppp:
message "Resolution and/or magnification is too high";
message "HPPP: "& decimal hppp &" Y: " & decimal y;
errmessage "please report to <bug-lilypond@gnu.org>";
fi;
x := (y / last_brace_number) [min_width, max_width];
increment := x / 10;
linethickness := (y / last_brace_number) [min_thin, max_thin];
if i = font_count:
draw_brace (y, x, linethickness, number);
fi;
number := number + 1;
endfor;
endfor;
fet_endfont ("feta-braces");
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