2 paper-def.cc -- implement Paper_def
4 source file of the GNU LilyPond music typesetter
6 (c) 1997--2004 Han-Wen Nienhuys <hanwen@cs.uu.nl>
12 #include "virtual-font-metric.hh"
13 #include "all-font-metrics.hh"
16 #include "paper-def.hh"
18 #include "scaled-font-metric.hh"
20 #include "scm-hash.hh"
21 #include "paper-outputter.hh"
22 #include "ly-module.hh"
25 This is an almost empty thing. The only substantial thing this class
26 handles is scaling up and down to real-world dimensions (internally
27 dimensions are against global staff-space.)
30 Paper_def::Paper_def ()
32 /* Do not remove this statement, scm_make_hash_table may trigger GC. */
33 scaled_fonts_ = SCM_EOL;
34 scaled_fonts_ = scm_c_make_hash_table (11);
37 Paper_def::Paper_def (Paper_def const&src)
38 : Music_output_def (src)
40 /* Do not remove this statement, scm_make_hash_table may trigger GC. */
41 scaled_fonts_ = SCM_EOL;
42 scaled_fonts_ = scm_c_make_hash_table (11);
45 Paper_def::~Paper_def ()
50 Paper_def::derived_mark ()
52 scm_gc_mark (scaled_fonts_);
56 Paper_def::get_dimension (SCM s) const
58 SCM val = lookup_variable (s);
59 SCM scale = lookup_variable (ly_symbol2scm ("outputscale"));
61 Real sc = ly_scm2double (scale);
62 return ly_scm2double (val) / sc;
65 /* FIXME. This is broken until we have a generic way of
66 putting lists inside the \paper block. */
68 Paper_def::line_dimensions_int (int n) const
70 Real lw = get_dimension (ly_symbol2scm ("linewidth"));
71 Real ind = n? 0.0:get_dimension (ly_symbol2scm ("indent"));
73 return Interval (ind, lw);
77 Paper_def::get_paper_outputter (String outname) const
79 progress_indication (_f ("paper output to `%s'...",
80 outname == "-" ? String ("<stdout>") : outname));
82 Paper_outputter * po = new Paper_outputter (outname);
83 Path p = split_path (outname);
85 po->basename_ = p.to_string ();
90 Paper_def::find_scaled_font (Font_metric *f, Real m, SCM input_enc_name)
92 SCM sizes = scm_hashq_ref (scaled_fonts_, f->self_scm (), SCM_BOOL_F);
93 if (sizes != SCM_BOOL_F)
95 SCM met = scm_assoc (scm_make_real (m), sizes);
97 return unsmob_metrics (ly_cdr (met));
102 /* Hmm. We're chaining font - metrics. Should consider whether to
103 merge virtual-font and scaled_font. */
105 if (Virtual_font_metric * vf = dynamic_cast<Virtual_font_metric*> (f))
107 /* For fontify_atom (), the magnification and name must be known
108 at the same time. That's impossible for
110 Scaled (Virtual_font (Font1,Font2))
114 Virtual_font (Scaled (Font1), Scaled (Font2)) */
117 for (SCM s = vf->get_font_list (); is_pair (s); s = ly_cdr (s))
119 Font_metric *scaled = find_scaled_font (unsmob_metrics (ly_car (s)),
121 *t = scm_cons (scaled->self_scm (), SCM_EOL);
125 vf = new Virtual_font_metric (lst);
126 val = vf->self_scm ();
130 SCM scale_var = ly_module_lookup (scope_, ly_symbol2scm ("outputscale"));
132 if (!is_symbol (input_enc_name))
134 SCM var = ly_module_lookup (scope_, ly_symbol2scm ("inputencoding"));
135 input_enc_name = scm_variable_ref (var);
137 m /= ly_scm2double (scm_variable_ref (scale_var));
138 val = Modified_font_metric::make_scaled_font_metric (input_enc_name,
142 sizes = scm_acons (scm_make_real (m), val, sizes);
143 scm_gc_unprotect_object (val);
144 scm_hashq_set_x (scaled_fonts_, f->self_scm (), sizes);
145 return unsmob_metrics (val);
149 /* Return alist to translate internally used fonts back to real-world
152 Paper_def::font_descriptions () const
154 SCM func = ly_scheme_function ("hash-table->alist");
157 for (SCM s = scm_call_1 (func, scaled_fonts_); is_pair (s); s = ly_cdr (s))
159 SCM entry = ly_car (s);
160 for (SCM t = ly_cdr (entry); is_pair (t); t = ly_cdr (t))
162 Font_metric *fm= unsmob_metrics (ly_cdar (t));
164 if (dynamic_cast<Modified_font_metric*> (fm))
165 l = scm_cons (fm->self_scm (), l);
174 return dynamic_cast<Paper_def*> (unsmob_music_output_def (x));
178 LY_DEFINE (ly_paper_def_p, "ly:paper-def?",
180 "Is @var{def} a paper definition?")
182 Paper_def *op = dynamic_cast<Paper_def*> (unsmob_music_output_def (def));
185 return ly_bool2scm (pap);