% Feta (not the Font-En-Tja) music font -- implement Clefs -*-Fundamental-*-
% This file is part of LilyPond, the GNU music typesetter.
%
-% Copyright (C) 1997--2009 Han-Wen Nienhuys <hanwen@xs4all.nl>,
+% Copyright (C) 1997--2015 Han-Wen Nienhuys <hanwen@xs4all.nl>,
% Jan Nieuwenhuizen <janneke@gnu.org>,
% Juergen Reuter <reuter@ipd.uka.de>
%
-% LilyPond is free software: you can redistribute it and/or modify
+% The LilyPond font 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.
+% (at your option) any later version, or under the SIL Open Font License.
%
% LilyPond is distributed in the hope that it will be useful,
% but WITHOUT ANY WARRANTY; without even the implied warranty of
fet_begingroup ("clefs");
+
+%
+% New bulb routine:
+%
+% Insert a brushed piece of the path, and draw the rest of the bulb
+% separately.
+%
+% The bulb has circular form. Neat merging of the bulb and brushed path
+% is done by playing with tension.
+%
+
+def new_bulb (expr start_point, start_angle,
+ outer_tangent_point,
+ end_point, end_angle,
+ big_radius, bulb_radius, flare,
+ direction, turning_dir) =
+begingroup;
+ save pat, before, after;
+ save center;
+ save u, v;
+ path pat, before, after;
+ pair center;
+
+ clearxy;
+
+ center = outer_tangent_point
+ + big_radius * dir (0);
+% + (big_radius - bulb_radius) * dir (-turning_dir * 90)
+
+ z1' = center + bulb_radius * dir (turning_dir * 180);
+ z2' = outer_tangent_point + flare * dir (0);
+ z3' = center + bulb_radius * dir (0);
+ z4' = center + bulb_radius * dir (turning_dir * 90);
+ z5' = center - 0.5 [big_radius, bulb_radius] * dir (turning_dir * 90);
+
+ labels (1', 2', 3', 4', 5');
+
+ before := z3'{dir (turning_dir * 90)}
+ .. z4'{-dir (0)}
+ ..tension 1.1.. z1'{-dir (turning_dir* 90)};
+ after := z2'{dir (turning_dir * 90)}
+ .. end_point{dir (end_angle)};
+ (u, v) = before intersectiontimes after;
+
+ pat := start_point{dir (start_angle)}
+ .. outer_tangent_point{dir (-turning_dir * 90)}
+ ..tension 1.02.. z5'{dir (0)}
+ .. subpath (0, u) of before
+ .. subpath (v, infinity) of after;
+
+ if direction = 0:
+ pat := reverse pat;
+ fi
+
+pat
+endgroup
+enddef;
+
+
%
% [Wanske] says the bulbs should be positioned about 1/4 right of the
% `arrow'.
% ugh, should be bulb, not flare?
- draw_staff (-2, 2, 0);
+ draw_staff_if_debugging (-2, 2);
enddef;
draw_c_clef (.8);
fet_endchar;
+def draw_varc_clef (expr reduction) =
+ save hair, norm, reduced_ss;
+ save thick, thin, upper_stroke;
-%
-% New bulb routine:
-%
-% Insert a brushed piece of the path, and draw the rest of the bulb
-% separately.
-%
-% The bulb has circular form. Neat merging of the bulb and brushed path
-% is done by playing with tension.
-%
+ path upper_stroke;
-def new_bulb (expr start_point, start_angle,
- outer_tangent_point,
- end_point, end_angle,
- big_radius, bulb_radius, flare,
- direction, turning_dir) =
-begingroup;
- save pat, before, after;
- save center;
- save u, v;
- path pat, before, after;
- pair center;
+ reduced_ss# = staff_space# * reduction;
+ norm# := 2/3 reduced_ss#;
+ hair# := 0.06 reduced_ss# + 0.5 linethickness#;
+ define_pixels (norm, reduced_ss);
+ define_whole_vertical_blacker_pixels (hair);
- clearxy;
+ set_char_box (0, 2.25 reduced_ss#, 2 reduced_ss#, 2 reduced_ss#);
- center = outer_tangent_point
- + big_radius * dir (0);
-% + (big_radius - bulb_radius) * dir (-turning_dir * 90)
+ % make unreduced glyph fit exactly into five staff lines
+ if reduction = 1:
+ h := d := 2 staff_space_rounded;
+ fi;
- z1' = center + bulb_radius * dir (turning_dir * 180);
- z2' = outer_tangent_point + flare * dir (0);
- z3' = center + bulb_radius * dir (0);
- z4' = center + bulb_radius * dir (turning_dir * 90);
- z5' = center - 0.5 [big_radius, bulb_radius] * dir (turning_dir * 90);
+ % assure that the gap between the left and right stem
+ % has the same number of pixels as the thickness of the right
+ % stem
+ draw_block ((0, -d + feta_shift),
+ (3/4 norm + 1/2 hair, h));
+ draw_block ((3/4 norm + 1/2 hair + hround (3/2 hair), -d + feta_shift),
+ (3/4 norm + 1/2 hair + 2 hround (3/2 hair), h));
- labels (1', 2', 3', 4', 5');
+ % assure symmetry
+ h := h - feta_shift;
- before := z3'{dir (turning_dir * 90)}
- .. z4'{-dir (0)}
- ..tension 1.1.. z1'{-dir (turning_dir* 90)};
- after := z2'{dir (turning_dir * 90)}
- .. end_point{dir (end_angle)};
- (u, v) = before intersectiontimes after;
+ thin := hround (3/2 hair);
+ thick := hround (3/4 norm);
- pat := start_point{dir (start_angle)}
- .. outer_tangent_point{dir (-turning_dir * 90)}
- ..tension 1.02.. z5'{dir (0)}
- .. subpath (0, u) of before
- .. subpath (v, infinity) of after;
+ x1'' = x8'' = x6'' - reduced_ss = 3/4 norm + 1/2 hair + 1.5 hround (3/2 hair);
+ x7'' = x6'' - 1/2 hair;
+ % the thick part of the c clef should be placed in the
+ % center of the forth staff space
+ y1'' = y2'' = 0.5 reduced_ss + thick/2;
- if direction = 0:
- pat := reverse pat;
- fi
+ y7'' = y8'' = y6'' - 1/2 hair = y1'' - thick;
-pat
-endgroup
+ x2'' = x3'' = x4'' = x6'' - thin;
+
+ y5'' = y3'' = y2'' + 0.6 reduced_ss;
+ x5'' = x6'';
+
+ y4'' = 2.25 reduced_ss;
+
+ upper_stroke := z1'' -- z2''
+ -- new_bulb (z3'', 90, z4'', z5'', 270,
+ 0.37 reduced_ss, 0.33 reduced_ss, thin, 1, -1)
+ -- z6''{down} .. z7''{left} -- z8'' -- cycle;
+
+ fill upper_stroke;
+ % the c clef parts should be symmetrical to the forth staff line
+ fill upper_stroke yscaled -1;
+
+ penlabels (1'', 2'', 3'', 4'', 5'', 6'', 7'', 8'');
+
+ draw_staff_if_debugging (-2, 2);
enddef;
+fet_beginchar ("Variant C clef", "varC");
+ draw_varc_clef (1.0);
+fet_endchar;
+
+
+fet_beginchar ("Variant C clef", "varC_change");
+ draw_varc_clef (0.8);
+fet_endchar;
+
+
%
% There is some variation in the shape of bass clefs.
%
penlabels (1, 2, 3, 4, 5, 6);
- draw_staff (-3, 1, 0);
+ draw_staff_if_debugging (-3, 1);
enddef;
def debugfill = fill enddef;
-def draw_gclef (expr reduction) =
- save reduced_ss, downstroke_dir, downstroke_angle, center;
+def draw_gclef (expr reduction, double_shift, extra_width) =
+ save reduced_ss, double_shift_ss, extra_width_ss;
+ save downstroke_dir, downstroke_angle, center;
save breapth_factor, inner_thick_end, thinness, thickness, thinnib;
- save start_angle, inner_start_angle, thinness;
+ save start_angle, inner_start_angle;
save upward_swoosh_angle, bot_angle;
- save pat;
- path pat;
+ save swirl, bulb, pat;
+ save corr_angle, corr, left_, right_, up_, down_, bot_angle_;
+ path swirl, bulb, pat;
pair downstroke_dir, center;
+ transform corr;
+ pair left_, right_, up_, down_;
reduced_ss# = staff_space# * reduction;
define_pixels (reduced_ss);
+ % G clef has now a smaller upper loop than it used to have.
+ % Too small loop in reduced clef (G_change) interacts badly
+ % with stafflines, so we make reduced clef's loop a bit bigger.
+ reduced_loop_correction := min (max (0.94, (0.6 + 0.46 * reduction)), 1);
+
thinness = 0.095 staff_space + 0.75 linethickness;
downstroke_dir = unitvector (14, -75);
downstroke_angle = angle downstroke_dir;
breapth_factor = 21/14;
inner_thick_end = 45;
inner_start_angle = downstroke_angle - 43;
- thickness = .32 reduced_ss + 1.1 linethickness;
+ thickness = .33 reduced_ss + 1.1 linethickness;
thinnib = thinness;
- set_char_box (0, 1.71 * breapth_factor * reduced_ss#,
- 2.6 * reduced_ss#, 5 * reduced_ss#);
+ set_char_box (0, (1.71 * breapth_factor + double_shift + extra_width) * reduced_ss#,
+ 2.55 * reduced_ss#, 4.8 * reduced_ss# / reduced_loop_correction);
center := (breapth_factor * reduced_ss, 0);
y5r = .37 reduced_ss + ypart center;
penpos5 (thickness, upward_swoosh_angle);
- z6 = center + whatever * downstroke_dir;
- y6 = ypart center + 2 reduced_ss;
+ z6 = center + whatever * downstroke_dir + (-0.02, 0) * reduced_ss;
+ y6 = ypart center + 1.95 reduced_ss / reduced_loop_correction;
% penpos6 is computed later
- z7l - z6 = whatever * (z5 - z6) ;
- y7l = 3.5 reduced_ss;
+ z7l - z6 = whatever * (z5 - z6);
+ y7l = 3.38 reduced_ss / reduced_loop_correction;
penpos7 (thickness, upward_swoosh_angle);
- x9 = .7 [x10, x7r];
- top y9l = 5 reduced_ss;
+ x9 = .75 [x10, x7r];
+ top y9l = 4.78 reduced_ss / reduced_loop_correction;
penpos9 (1.45 thickness, -70);
- x11 - x13r = 1.5 reduced_ss + 0.5 thinnib;
- y11 = ypart center - 47/28 reduced_ss;
- y12 = ypart center - 71/28 reduced_ss;
+ x11 - x13r = 1.44 * reduced_ss + 0.5 thinnib;
+ y11 = ypart center - 45/28 reduced_ss;
+ y12 = ypart center - 69/28 reduced_ss;
y13 = .48 [y12, y4r];
x12r = xpart (.45 [z13r, z11] + .75 reduced_ss * downstroke_dir);
% z10 = center + whatever * dir (downstroke_angle - 1.5);
- x10 = x6 - 2 thinnib;
- y10 = ypart center + 3.5 reduced_ss;
+ x10 = x6 - 1.85 thinnib * reduction / reduced_loop_correction;
+ y10 = ypart center + 3.32 reduced_ss / reduced_loop_correction;
y10l - y10r = 1.0 thickness;
z10r - z10l = .7 thinnib * dir (downstroke_angle + 90)
+ whatever * downstroke_dir;
z10 = .5 [z10l, z10r];
- z11 = center + whatever * downstroke_dir + (-0.05 reduced_ss, 0);
+ z11 = center + whatever * downstroke_dir + (0.03 reduced_ss, 0);
penpos11 (thinnib, start_angle + 90);
penpos12 (thinnib, bot_angle + 90);
z10' = point 0.3 of pat;
penpos10' (1.3 thinnib, angle (direction 0.3 of pat) + 50);
- z11' = point 1.5 of pat;
+ z11' = point 1.5 of pat + (0.033, -0.5) * reduced_ss;
penpos11' (thinnib, angle (direction 1.5 of pat) + 90);
z21l = z20l;
z21r = z9r;
- pat := z21l
- .. z10l{down}
- .. z10'l;
-
- fill z2l{right}
- .. z3l
- .. z4l{left}
- ..tension 1.07.. z5l{up} % inside curve
- .. z7l{up}
- ..tension 1.2.. z20r{curl 1}
- .. {direction 0 of pat}z20l
- -- z8
- -- z9r % {dir (downstroke_angle + 0)}
- ..tension 0.8.. z7r{down}
- .. z5r{down}
- .. z4r{right}
- .. z3r
- .. z2r{left}
- ..tension .95.. z1r
- -- simple_serif (z1r, z1l, 80)
- -- z1l
- ..tension 0.85.. cycle;
-
- penstroke z21e
- .. z10e{down}
- .. z10'e
- .. z6e
- .. z11'e
- .. z11e{dir (-95)}
- .. z12e{dir (bot_angle)};
-
- fill new_bulb (z12r, bot_angle, z13r, z12l, bot_angle + 180,
- 0.45 reduced_ss, 0.38 reduced_ss,
- thinnib + .05 staff_space, 1, -1)
- -- cycle;
+ % after computing all points, we want to rotate the clef
+ % rotating the whole picture won't work due to the complexity
+ % of the path and metafont's memory limitations, so we transform
+ % each point and draw the clef thereafter
+ corr_angle := 1.5;
+ corr := identity rotatedabout (center, -corr_angle);
+
+ bot_angle_ := bot_angle + corr_angle;
+
+ left_ := left rotated corr_angle;
+ right_ := right rotated corr_angle;
+ up_ := up rotated corr_angle;
+ down_ := down rotated corr_angle;
+
+ % transform points; we transform every point and save it
+ % to a shifted index range: z1 -> z101, z2 -> z102, etc.
+ for n := 1 upto 21:
+ forsuffixes e := l,,r:
+ z[n+100]e = z[n]e transformed corr;
+ endfor
+ endfor
+
+ % transform helper points
+ for n := 10, 11:
+ forsuffixes e := l,,r:
+ z[n+100]'e = z[n]'e transformed corr;
+ endfor
+ endfor
+
+ pat := z121l
+ .. z110l{down}
+ .. z110'l;
+
+ swirl := z102l{right}
+ .. z103l
+ .. z104l{left_}
+ ..tension 1.07.. z105l{up_}% inside curve
+ .. z107l{up_}
+ ..tension 1.2.. z120r{curl 1}
+ .. {direction 0 of pat}z120l
+ -- z108
+ -- z109r % {dir (downstroke_angle + 0)}
+ ..tension 0.8.. z107r{down_}
+ .. z105r{down_}
+ .. z104r{right_}
+ .. z103r
+ .. z102r{left_}
+ ..tension .95.. z101r
+ -- simple_serif (z101r, z101l, 80)
+ -- z101l
+ ..tension 0.85.. cycle;
+ fill swirl;
+
+ penstroke z121e
+ .. z110e{down_}
+ .. z110'e
+ .. z106e
+ .. z111'e
+ .. z111e{dir (-95 + corr_angle)}
+ .. z112e{dir (bot_angle_)};
+
+ bulb := new_bulb (z112r, bot_angle_, z113r, z112l, bot_angle_ + 180,
+ 0.45 reduced_ss, 0.38 reduced_ss,
+ thinnib + .05 staff_space, 1, -1)
+ -- cycle;
+
+ fill bulb;
+
+ if double_shift <> 0:
+ addto currentpicture also
+ currentpicture shifted (double_shift * reduced_ss, 0);
+ fi;
- penlabels (range 1 thru 21);
- penlabels (10', 11');
+ penlabels (range 101 thru 121);
+ penlabels (110', 111');
- draw_staff (-1, 3, 0);
+ draw_staff_if_debugging (-1, 3);
enddef;
fet_beginchar ("G clef", "G");
- draw_gclef (1.0);
+ draw_gclef (1.0, 0, 0);
fet_endchar;
fet_beginchar ("G clef", "G_change");
- draw_gclef (0.8);
+ draw_gclef (0.8, 0, 0);
+fet_endchar;
+
+
+fet_beginchar ("double G clef", "GG");
+ draw_gclef (1.0, 1.5, 0);
+fet_endchar;
+
+
+fet_beginchar ("double G clef", "GG_change");
+ draw_gclef (0.8, 1.5, 0);
fet_endchar;
+def draw_tenor_extension (expr reduction) =
+ save reduced_ss, thick, thin, upper_stroke, ne_beam_dir, nw_dist;
+ path upper_stroke;
+ pair ne_beam_dir, nw_dist;
+
+ reduced_ss# = staff_space# * reduction;
+ define_pixels (reduced_ss);
+
+ thin := hround (0.17 reduced_ss);
+ thick := hround (0.51 reduced_ss);
+
+ % the slanted left edge should protrude the g clef by a
+ % fixed amount relative to the width of the g clef:
+ x1'' = x6'' - 1.8 reduced_ss - 0.5 staff_space = 0.62 reduced_ss * reduction;
+ x8'' = x1'' - 2 thin;
+ x2'' = x3'' = x4'' = x6'' - thin;
+ x5'' = x6'';
+ x7'' = x6'' - 1/3 thin;
+ % the thick part of the c clef should be placed in the
+ % center of the forth staff space
+ y1'' = y2'' = 2.5 staff_space + thick/2;
+ y7'' = y8'' = y6'' - 1/3 thin = y1'' - thick;
+ y5'' = y3'' = y2'' + reduced_ss;
+ y4'' = 4.5 reduced_ss;
+
+ upper_stroke := z2''
+ -- new_bulb (z3'', 90, z4'', z5'', 270,
+ 0.35 reduced_ss, 0.22 reduced_ss, thin, 1, -1)
+ -- z6''{down} .. z7''{left};
+
+ % z1'' and z8'' are helper points that are responsible for
+ % hiding the lower left slant in the g clef's stroke
+ % z9'' and z10'' are computed to obtain nice rounded corners
+
+ pickup pencircle scaled 2/3 thin;
+ lft x9'' = x1'';
+ lft x10'' = x8'';
+
+ top y9'' = y1'';
+ bot y10'' = y8'';
+
+ ne_beam_dir = unitvector (z9'' - z10'');
+ nw_dist = (ne_beam_dir rotated 90) * 1/3 thin;
+
+ fill (z9''+nw_dist){ne_beam_dir}
+ ... top z9''{right}
+ -- upper_stroke
+ -- bot z10''{left}
+ ... (z10''+nw_dist){ne_beam_dir}
+ -- cycle;
+
+ % the slanted edge of the lower hook must not be visible, so it is
+ % shifted accordingly in x direction;
+ z1''' = z1'' shifted (staff_space - 0.9 reduced_ss, - staff_space);
+ z8''' = z8'' shifted (staff_space - 0.9 reduced_ss, - staff_space);
+
+ % the visible c clef parts should be symmetrical to the forth staff line
+ fill z1'''
+ -- reverse upper_stroke yscaled -1 shifted (0, 4 staff_space)
+ -- z8''' -- cycle;
+
+ penlabels (1''',2'',3'',4'',5'',6'',7'',8''',9'',10'');
+
+ draw_staff_if_debugging (-1, 3);
+enddef;
+
+fet_beginchar ("Tenor G clef", "tenorG");
+ draw_gclef (1.0, 0, 0.75);
+ draw_tenor_extension (1.0);
+fet_endchar;
+
+
+fet_beginchar ("Tenor G clef", "tenorG_change");
+ draw_gclef (0.8, 0, 0.75);
+ draw_tenor_extension (0.8);
+fet_endchar;
%%%%
%
draw_block ((-b, -d), (-b + razt, h));
draw_block ((w - razt, -d), (w, h));
- draw_staff (-3, 1, 1);
+ draw_staff_if_debugging (-3, 1);
enddef;
draw_percussion_clef (.8);
fet_endchar;
+def draw_varpercussion_clef (expr reduction) =
+ save reduced_ss, thin, thick;
+
+ reduced_ss# = staff_space# * reduction;
+ define_pixels (reduced_ss);
+
+ set_char_box (-.67 reduced_ss#, 1.75 reduced_ss#,
+ 1.675 reduced_ss#, 1.675 reduced_ss#);
+
+ thin := hround (0.175 reduced_ss);
+ thick := hround (0.35 reduced_ss);
+
+ d := d - feta_shift;
+
+ draw_block ((-b, -d), (-b + thin, h));
+ draw_block ((w - thin, -d), (w, h));
+
+ pickup penrazor scaled thick rotated 90;
+
+ top z1 = (-b + thin/2, h);
+ top z2 = (w - thin/2, h);
+
+ bot z3 = (-b + thin/2, -d);
+ bot z4 = (w - thin/2, -d);
+
+ draw z1 -- z2;
+ draw z3 -- z4;
+
+ penlabels (range 1 thru 4);
+
+ draw_staff_if_debugging (-3, 1);
+enddef;
+
+
+fet_beginchar ("variant percussion clef", "varpercussion");
+ draw_varpercussion_clef (1.0);
+fet_endchar;
+
+
+fet_beginchar ("variant percussion clef (reduced)", "varpercussion_change");
+ draw_varpercussion_clef (.8);
+fet_endchar;
+
def draw_tab_T (expr pos, siz, slant) =
begingroup;
draw_tab_B ((-b + .025 reduced_ss, -d),
(2.1 reduced_ss, letterheight), 0.25);
- draw_staff (-3, 2, 0.5);
+ draw_staff_if_debugging (-3, 2);
enddef;
projects / lilypond.git / blobdiff