/usr/share/lilypond/2.14.2/fonts/source/feta-params.mf is in lilypond-data 2.14.2-4.
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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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 | % Feta (not the Font-En-Tja) music font -- global parameters for both feta and parmesan fonts
% This file is part of LilyPond, the GNU music typesetter.
%
% Copyright (C) 1997--2011 Han-Wen Nienhuys <hanwen@xs4all.nl>
%
% 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/>.
stafflines := 5;
%
% The design size of a staff should really be the
% staff_space, but we use staffsize for historical reasons.
%
staff_space# := staffsize# / (stafflines - 1);
staff_space_rounded# := staff_space#;
%
% Measuring on pocket scores turns out: stafflinethickness is
% largely independent on staff size, and generally about 0.5 pt.
%
% By request of WL, we tune down the blackness a little
% for increased contrast with beams.
%
%% !! synchronize with paper.scm
save fixed_line_thickness, variable_line_factor;
fixed_line_thickness + variable_line_factor * 5 pt# = 0.50 pt#;
fixed_line_thickness + variable_line_factor * 4.125 pt# = 0.47 pt#;
stafflinethickness# := fixed_line_thickness
+ variable_line_factor * staff_space#;
stafflinethickness_rounded# := stafflinethickness#;
%
% The following tunes the general blackness of the glyphs.
%
linethickness# := stafflinethickness#; %% 0.5 pt#;
linethickness_rounded# := linethickness#;
%
% bigger puff_up_factor, relatively thicker stafflines.
%
% 20 pt = puff_up_factor 0
% 10 pt = puff_up_factor 1
%
puff_up_factor = (linethickness# - 0.1 staff_space#) / (0.1 staff_space#);
stemthickness# := 1.3 stafflinethickness#;
stemthickness_rounded# := stemthickness#;
ledgerlinethickness# := 2 stafflinethickness#;
ledgerlinethickness_rounded# := ledgerlinethickness#;
define_pixels (staff_space, stemthickness, stafflinethickness,
ledgerlinethickness, linethickness);
define_whole_pixels (staff_space_rounded);
define_whole_blacker_pixels (stemthickness_rounded);
define_whole_vertical_blacker_pixels (stafflinethickness_rounded,
ledgerlinethickness_rounded,
linethickness_rounded);
if ledgerlinethickness_rounded > 2 stafflinethickness_rounded:
ledgerlinethickness_rounded := 2 stafflinethickness_rounded;
fi;
%
% Because of the engraving/stamping process, no traditional
% characters have sharp edges and corners.
% The following variable controls the amount of `roundness'.
%
% This is not a meta variable: it is related to absolute sizes.
%
% FIXME: According to [Wanske], only outside corners should be round
% I don't think we do this anywhere -- jcn
%
blot_diameter# = .40 pt#;
if (blot_diameter# * hppp) < 1:
blot_diameter# := 1 / hppp;
fi
if (blot_diameter# * vppp) < 1:
blot_diameter# := 1 / vppp;
fi
define_pixels (blot_diameter);
%
% symmetry
% --------
%
% Some glyphs have to be positioned exactly between stafflines (clefs,
% note heads). This needs some care at lower resolutions.
%
% Most glyphs use the staffline thickness and the space between two
% staff lines as the fundamental parameters. The latter is the distance
% between the middle of one staff line to the middle of the next. To
% say it differently, the value `staff_space' is the sum of one staff line
% thickness and the whitespace between two adjacent staff lines.
%
% Normally, feta's vertical origin for glyphs is either the middle
% between two staff lines or the middle of a staff line. For example, the
% lower edge of the central staff line is at the vertical position
% `-<staffline thickness> / 2', and the upper edge at
% `<staffline thickness> / 2'. Here we need a value rounded to an integer
% (the feta code uses `stafflinethickness_rounded' for that purpose).
%
% If we have an odd number of pixels as the staffline thickness, Metafont
% rounds `-stafflinethickness_rounded / 2' towards zero and
% `stafflinethickness_rounded / 2' towards infinity. Example: `round -1.5'
% yields -1, `round 1.5' yields 2. The whitespace between staff lines is
% handled similarly. If we assume that stafflinethickness_rounded is odd,
% we have the following cases:
%
% o The glyph is centered between three stafflines or five stafflines
% (clef, `c' meter). We have this:
%
% ___________ a
% ___________ 1
% ___________ a
%
% whitespace
%
% ___________ a
% ...... ___________ 1 .................. x axis
% ___________ a
%
% whitespace
%
% ___________ a
% ___________ 1
% ___________ a
%
% As can be seen, we get symmetry if we split staff lines into two
% equal parts `a' and a pixel line with thickness 1. Consequently, we
% use the following algorithm:
%
% . Decrease the height `h' by 1 temporarily.
%
% . Compute the path for the upper half of the glyph.
%
% . Mirror the path at the x axis.
%
% . Shift the upper half one pixel up and connect it with the lower path.
%
% . Restore height and decrease `d' by 1.
%
% o The glyph is centered between two or four staff lines, and the origin is
% the middle of the whitespace. Assuming that the whitespace consists of
% an odd number of pixels, we have this:
%
% -----------
% b
% 1
% b
% ___________
% b
% .................. 1 ................. x axis
% b
% ___________
% b
% 1
% b
% ___________
%
% For symmetrical glyphs, this leads to a similar algorithm as above.
% Glyphs which can't be constructed from an upper and lower part need
% to be handled differently, namely to shift up the vertical center by
% half a pixel:
%
% ___________
% b
%
% 0.5
% .................. 0.5 ................ x axis
%
% b
% ___________
%
feta_eps := 0;
feta_shift := 0;
feta_space_shift := 0;
% Use this for paths with a slant of 45 degrees to assure that
% the middle point of a penpos gets covered.
pair feta_offset;
feta_offset := (0, 0);
if known miterlimit:
pickup nullpen;
else:
feta_eps := eps;
if odd stafflinethickness_rounded:
feta_shift := 1;
fi;
if odd (staff_space_rounded - stafflinethickness_rounded):
feta_space_shift := 1;
fi;
feta_offset := (0.5, 0.5);
pickup pencircle scaled 1;
fi;
feta_fillpen := savepen;
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