2 paper-def.cc -- implement Paper_def
4 source file of the GNU LilyPond music typesetter
6 (c) 2004 Han-Wen Nienhuys <hanwen@xs4all.nl>
9 #include "dimensions.hh"
10 #include "ly-module.hh"
11 #include "output-def.hh"
12 #include "modified-font-metric.hh"
15 output_scale (Output_def *od)
17 return scm_to_double (od->lookup_variable (ly_symbol2scm ("outputscale")));
20 /* TODO: should add nesting for Output_def here too. */
22 find_scaled_font (Output_def *mod, Font_metric *f, Real m,
23 SCM font_encoding, SCM input_encoding)
26 return find_scaled_font (mod->parent_, f, m, font_encoding, input_encoding);
28 Real lookup_mag = m / output_scale (mod);
31 SCM font_table = mod->lookup_variable (ly_symbol2scm ("scaled-fonts"));
32 if (scm_hash_table_p (font_table) != SCM_BOOL_T)
34 font_table = scm_c_make_hash_table (11);
35 mod->set_variable (ly_symbol2scm ("scaled-fonts"), font_table);
38 SCM sizes = scm_hashq_ref (font_table, f->self_scm (), SCM_BOOL_F);
39 if (sizes != SCM_BOOL_F)
41 SCM met = scm_assoc (scm_make_real (lookup_mag), sizes);
42 if (scm_is_pair (met))
43 return unsmob_metrics (scm_cdr (met));
48 SCM val = Modified_font_metric::make_scaled_font_metric (f, lookup_mag,
52 sizes = scm_acons (scm_make_real (lookup_mag), val, sizes);
53 scm_gc_unprotect_object (val);
54 scm_hashq_set_x (font_table, f->self_scm (), sizes);
55 return unsmob_metrics (val);
58 /* TODO: this is a nasty interface. During formatting,
59 the Output_def should be scaled to the output_scale_
60 specified in the toplevel Output_def. */
62 scale_output_def (Output_def *o, Real amount)
64 SCM proc = ly_scheme_function ("scale-layout");
65 SCM new_pap = scm_call_2 (proc, o->self_scm (), scm_double2num (amount));
66 scm_gc_protect_object (new_pap);
68 return unsmob_output_def (new_pap);
71 LY_DEFINE (ly_paper_fonts, "ly:paper-fonts",
74 "Return fonts scaled up BP")
76 Output_def *b = unsmob_output_def (bp);
78 SCM font_table = b->lookup_variable (ly_symbol2scm ("scaled-fonts"));
80 SCM_ASSERT_TYPE (b, bp, SCM_ARG1, __FUNCTION__, "paper");
83 if (scm_hash_table_p (font_table) == SCM_BOOL_T)
85 SCM func = ly_scheme_function ("hash-table->alist");
87 for (SCM s = scm_call_1 (func, font_table); scm_is_pair (s);
90 SCM entry = scm_car (s);
91 for (SCM t = scm_cdr (entry); scm_is_pair (t); t = scm_cdr (t))
93 Font_metric *fm = unsmob_metrics (scm_cdar (t));
95 if (dynamic_cast<Modified_font_metric*> (fm))
96 ell = scm_cons (fm->self_scm (), ell);