2 This file is part of LilyPond, the GNU music typesetter.
4 Copyright (C) 1997--2009 Han-Wen Nienhuys <hanwen@xs4all.nl>
6 LilyPond is free software: you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation, either version 3 of the License, or
9 (at your option) any later version.
11 LilyPond is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with LilyPond. If not, see <http://www.gnu.org/licenses/>.
21 #include "font-metric.hh"
22 #include "libc-extension.hh"
27 TODO: naming add/combine.
30 LY_DEFINE (ly_stencil_translate_axis, "ly:stencil-translate-axis",
31 3, 0, 0, (SCM stil, SCM amount, SCM axis),
32 "Return a copy of @var{stil} but translated by @var{amount}"
33 " in @var{axis} direction.")
35 Stencil *s = unsmob_stencil (stil);
36 LY_ASSERT_SMOB (Stencil, stil, 1);
37 LY_ASSERT_TYPE (scm_is_number, amount, 2);
38 LY_ASSERT_TYPE (is_axis, axis, 3);
40 Real real_amount = scm_to_double (amount);
42 SCM new_s = s->smobbed_copy ();
43 Stencil *q = unsmob_stencil (new_s);
44 q->translate_axis (real_amount, Axis (scm_to_int (axis)));
48 LY_DEFINE (ly_stencil_translate, "ly:stencil-translate",
49 2, 0, 0, (SCM stil, SCM offset),
50 "Return a @var{stil}, but translated by @var{offset}"
51 " (a pair of numbers).")
53 Stencil *s = unsmob_stencil (stil);
54 LY_ASSERT_SMOB (Stencil, stil, 1);
55 LY_ASSERT_TYPE (is_number_pair, offset, 2);
56 Offset o = ly_scm2offset (offset);
58 SCM new_s = s->smobbed_copy ();
59 Stencil *q = unsmob_stencil (new_s);
64 LY_DEFINE (ly_stencil_expr, "ly:stencil-expr",
66 "Return the expression of @var{stil}.")
68 Stencil *s = unsmob_stencil (stil);
69 LY_ASSERT_SMOB (Stencil, stil, 1);
73 LY_DEFINE (ly_stencil_extent, "ly:stencil-extent",
74 2, 0, 0, (SCM stil, SCM axis),
75 "Return a pair of numbers signifying the extent of @var{stil} in"
76 " @var{axis} direction (@code{0} or @code{1} for x and"
77 " y@tie{}axis, respectively).")
79 Stencil *s = unsmob_stencil (stil);
80 LY_ASSERT_SMOB (Stencil, stil, 1);
81 LY_ASSERT_TYPE (is_axis, axis, 2);
83 return ly_interval2scm (s->extent (Axis (scm_to_int (axis))));
86 LY_DEFINE (ly_stencil_empty_p, "ly:stencil-empty?",
88 "Return whether @var{stil} is empty.")
90 Stencil *s = unsmob_stencil (stil);
91 LY_ASSERT_SMOB (Stencil, stil, 1);
92 return scm_from_bool (s->is_empty ());
95 LY_DEFINE (ly_stencil_combine_at_edge, "ly:stencil-combine-at-edge",
96 4, 2, 0, (SCM first, SCM axis, SCM direction,
100 "Construct a stencil by putting @var{second} next to @var{first}."
101 " @var{axis} can be 0 (x-axis) or@tie{}1 (y-axis)."
102 " @var{direction} can be -1 (left or down) or@tie{}1 (right or"
103 " up). The stencils are juxtaposed with @var{padding} as extra"
104 " space. If this puts the reference points closer than"
105 " @var{minimum}, they are moved by the latter amount."
106 " @var{first} and @var{second} may also be @code{'()} or"
109 Stencil *s1 = unsmob_stencil (first);
110 Stencil *s2 = unsmob_stencil (second);
113 SCM_ASSERT_TYPE (s1 || first == SCM_BOOL_F || first == SCM_EOL,
114 first, SCM_ARG1, __FUNCTION__, "Stencil, #f or ()");
115 SCM_ASSERT_TYPE (s2 || second == SCM_BOOL_F || second == SCM_EOL,
116 second, SCM_ARG4, __FUNCTION__, "Stencil, #f or ()");
117 LY_ASSERT_TYPE (is_axis, axis, 2);
118 LY_ASSERT_TYPE (is_direction, direction, 3);
121 if (padding != SCM_UNDEFINED)
123 LY_ASSERT_TYPE (scm_is_number, padding, 5);
124 p = scm_to_double (padding);
127 if (minimum != SCM_UNDEFINED)
129 LY_ASSERT_TYPE (scm_is_number, minimum, 6);
130 m = scm_to_double (minimum);
137 result.add_at_edge (Axis (scm_to_int (axis)),
138 Direction (scm_to_int (direction)), *s2, p);
140 return result.smobbed_copy ();
143 LY_DEFINE (ly_stencil_add, "ly:stencil-add",
145 "Combine stencils. Takes any number of arguments.")
147 #define FUNC_NAME __FUNCTION__
148 SCM_VALIDATE_REST_ARGUMENT (args);
155 while (!SCM_NULLP (args))
157 Stencil *s = unsmob_stencil (scm_car (args));
159 SCM_ASSERT_TYPE (s, scm_car (args), SCM_ARGn, __FUNCTION__, "Stencil");
161 extent.unite (s->extent_box ());
162 *tail = scm_cons (s->expr (), SCM_EOL);
163 tail = SCM_CDRLOC (*tail);
164 args = scm_cdr (args);
167 expr = scm_cons (ly_symbol2scm ("combine-stencil"), expr);
168 return Stencil (extent, expr).smobbed_copy ();
171 LY_DEFINE (ly_make_stencil, "ly:make-stencil",
172 1, 2, 0, (SCM expr, SCM xext, SCM yext),
173 "Stencils are device independent output expressions."
174 " They carry two pieces of information:\n"
178 "A specification of how to print this object."
179 " This specification is processed by the output backends,"
180 " for example @file{scm/output-ps.scm}.\n"
183 "The vertical and horizontal extents of the object, given as"
184 " pairs. If an extent is unspecified (or if you use"
185 " @code{(1000 . -1000)} as its value), it is taken to be empty.\n"
188 SCM_ASSERT_TYPE (!scm_is_pair (expr)
189 || is_stencil_head (scm_car (expr)),
190 expr, SCM_ARG1, __FUNCTION__, "registered stencil expression");
194 if (xext != SCM_UNDEFINED)
196 LY_ASSERT_TYPE (is_number_pair, xext, 2);
197 x = ly_scm2interval (xext);
201 if (yext != SCM_UNDEFINED)
203 LY_ASSERT_TYPE (is_number_pair, yext, 3);
204 y = ly_scm2interval (yext);
209 return s.smobbed_copy ();
212 LY_DEFINE (ly_stencil_aligned_to, "ly:stencil-aligned-to",
213 3, 0, 0, (SCM stil, SCM axis, SCM dir),
214 "Align @var{stil} using its own extents. @var{dir} is a number."
215 " @code{-1} and @code{1} are left and right, respectively."
216 " Other values are interpolated (so @code{0} means the center).")
218 LY_ASSERT_SMOB (Stencil, stil, 1);
219 LY_ASSERT_TYPE (is_axis, axis, 2);
220 LY_ASSERT_TYPE (scm_is_number, dir, 3);
222 Stencil target = *unsmob_stencil (stil);
224 target.align_to ((Axis)scm_to_int (axis),
225 scm_to_double (dir));
226 return target.smobbed_copy ();
229 LY_DEFINE (ly_stencil_fonts, "ly:stencil-fonts",
231 "Analyze @var{s}, and return a list of fonts used"
234 LY_ASSERT_SMOB (Stencil, s, 1);
235 Stencil *stil = unsmob_stencil (s);
236 return find_expression_fonts (stil->expr ());
239 LY_DEFINE (ly_stencil_in_color, "ly:stencil-in-color",
240 4, 0, 0, (SCM stc, SCM r, SCM g, SCM b),
241 "Put @var{stc} in a different color.")
243 LY_ASSERT_SMOB (Stencil, stc, 1);
244 Stencil *stil = unsmob_stencil (stc);
245 return Stencil (stil->extent_box (),
246 scm_list_3 (ly_symbol2scm ("color"),
247 scm_list_3 (r, g, b),
248 stil->expr ())).smobbed_copy ();
251 struct Stencil_interpret_arguments
257 void stencil_interpret_in_scm (void *p, SCM expr)
259 Stencil_interpret_arguments *ap = (Stencil_interpret_arguments *) p;
260 scm_call_2 (ap->func, ap->arg1, expr);
263 LY_DEFINE (ly_interpret_stencil_expression, "ly:interpret-stencil-expression",
264 4, 0, 0, (SCM expr, SCM func, SCM arg1, SCM offset),
265 "Parse @var{expr}, feed bits to @var{func} with first arg"
266 " @var{arg1} having offset @var{offset}.")
268 LY_ASSERT_TYPE (ly_is_procedure, func, 2);
270 Stencil_interpret_arguments a;
273 Offset o = ly_scm2offset (offset);
275 interpret_stencil_expression (expr, stencil_interpret_in_scm, (void *) & a, o);
277 return SCM_UNSPECIFIED;
280 LY_DEFINE (ly_bracket, "ly:bracket",
282 (SCM a, SCM iv, SCM t, SCM p),
283 "Make a bracket in direction@tie{}@var{a}. The extent of the"
284 " bracket is given by @var{iv}. The wings protrude by an amount"
285 " of@tie{}@var{p}, which may be negative. The thickness is given"
288 LY_ASSERT_TYPE (is_axis, a, 1);
289 LY_ASSERT_TYPE (is_number_pair, iv, 2);
290 LY_ASSERT_TYPE (scm_is_number, t, 3);
291 LY_ASSERT_TYPE (scm_is_number, p, 4);
293 return Lookup::bracket ((Axis)scm_to_int (a), ly_scm2interval (iv),
296 0.95 * scm_to_double (t)).smobbed_copy ();
299 LY_DEFINE (ly_stencil_rotate, "ly:stencil-rotate",
300 4, 0, 0, (SCM stil, SCM angle, SCM x, SCM y),
301 "Return a stencil @var{stil} rotated @var{angle} degrees around"
302 " the relative offset (@var{x}, @var{y}). E.g. an offset of"
303 " (-1, 1) will rotate the stencil around the left upper corner.")
305 Stencil *s = unsmob_stencil (stil);
306 LY_ASSERT_SMOB (Stencil, stil, 1);
307 LY_ASSERT_TYPE (scm_is_number, angle, 2);
308 LY_ASSERT_TYPE (scm_is_number, x, 3);
309 LY_ASSERT_TYPE (scm_is_number, y, 4);
310 Real a = scm_to_double (angle);
311 Real x_off = scm_to_double (x);
312 Real y_off = scm_to_double (y);
314 SCM new_s = s->smobbed_copy ();
315 Stencil *q = unsmob_stencil (new_s);
316 q->rotate_degrees (a, Offset (x_off, y_off));
320 LY_DEFINE (ly_stencil_rotate_absolute, "ly:stencil-rotate-absolute",
321 4, 0, 0, (SCM stil, SCM angle, SCM x, SCM y),
322 "Return a stencil @var{stil} rotated @var{angle} degrees around"
323 " point (@var{x}, @var{y}), given in absolute coordinates.")
325 Stencil *s = unsmob_stencil (stil);
326 LY_ASSERT_SMOB (Stencil, stil, 1);
327 LY_ASSERT_TYPE (scm_is_number, angle, 2);
328 LY_ASSERT_TYPE (scm_is_number, x, 3);
329 LY_ASSERT_TYPE (scm_is_number, y, 4);
330 Real a = scm_to_double (angle);
331 Real x_off = scm_to_double (x);
332 Real y_off = scm_to_double (y);
334 SCM new_s = s->smobbed_copy ();
335 Stencil *q = unsmob_stencil (new_s);
336 q->rotate_degrees_absolute (a, Offset (x_off, y_off));
340 LY_DEFINE (ly_round_filled_box, "ly:round-filled-box",
342 (SCM xext, SCM yext, SCM blot),
343 "Make a @code{Stencil} object that prints a black box of"
344 " dimensions @var{xext}, @var{yext} and roundness @var{blot}.")
346 LY_ASSERT_TYPE (is_number_pair, xext, 1);
347 LY_ASSERT_TYPE (is_number_pair, yext, 2);
348 LY_ASSERT_TYPE (scm_is_number, blot, 3);
350 return Lookup::round_filled_box (Box (ly_scm2interval (xext), ly_scm2interval (yext)),
351 scm_to_double (blot)).smobbed_copy ();
354 LY_DEFINE (ly_round_filled_polygon, "ly:round-filled-polygon",
356 (SCM points, SCM blot),
357 "Make a @code{Stencil} object that prints a black polygon with"
358 " corners at the points defined by @var{points} (list of coordinate"
359 " pairs) and roundness @var{blot}.")
361 SCM_ASSERT_TYPE (scm_ilength (points) > 0, points, SCM_ARG1, __FUNCTION__, "list of coordinate pairs");
362 LY_ASSERT_TYPE (scm_is_number, blot, 2);
364 for (SCM p = points; scm_is_pair (p); p = scm_cdr (p))
366 SCM scm_pt = scm_car (p);
367 if (scm_is_pair (scm_pt)) {
368 pts.push_back (ly_scm2offset (scm_pt));
370 // TODO: Print out warning
373 return Lookup::round_filled_polygon (pts, scm_to_double (blot)).smobbed_copy ();
376 LY_DEFINE (ly_register_stencil_expression, "ly:register-stencil-expression",
379 "Add @var{symbol} as head of a stencil expression.")
381 LY_ASSERT_TYPE (ly_is_symbol, symbol, 1);
382 register_stencil_head (symbol);
383 return SCM_UNSPECIFIED;
386 LY_DEFINE (ly_all_stencil_expressions, "ly:all-stencil-expressions",
389 "Return all symbols recognized as stencil expressions.")
391 return all_stencil_heads ();