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 "input-file-results.hh" // urg? header_global
22 #include "paper-outputter.hh"
23 #include "ly-module.hh"
26 This is an almost empty thing. The only substantial thing this class
27 handles is scaling up and down to real-world dimensions (internally
28 dimensions are against global staff-space.)
31 Paper_def::Paper_def ()
33 scaled_fonts_ = SCM_EOL;
35 don't remove above statement, scm_make_hash_table may trigger GC.
37 scaled_fonts_ = scm_c_make_hash_table (11);
40 Paper_def::~Paper_def ()
44 Paper_def::Paper_def (Paper_def const&src)
45 : Music_output_def (src)
47 scaled_fonts_ = SCM_EOL;
49 don't remove above statement, scm_make_hash_table may trigger GC.
51 scaled_fonts_ = scm_c_make_hash_table (11);
55 Paper_def::derived_mark ()
57 scm_gc_mark (scaled_fonts_);
61 Paper_def::get_dimension (SCM s) const
63 SCM val = lookup_variable (s);
64 SCM scale = lookup_variable (ly_symbol2scm ("outputscale"));
66 Real sc = gh_scm2double (scale);
67 return gh_scm2double (val) / sc;
71 FIXME. This is broken until we have a generic way of
72 putting lists inside the \paper block.
75 Paper_def::line_dimensions_int (int n) const
77 Real lw = get_dimension (ly_symbol2scm ("linewidth"));
78 Real ind = n? 0.0:get_dimension (ly_symbol2scm ("indent"));
80 return Interval (ind, lw);
87 Paper_def::get_paper_outputter (String outname) const
89 progress_indication (_f ("paper output to `%s'...",
90 outname == "-" ? String ("<stdout>") : outname));
91 progress_indication("\n");
93 global_input_file->target_strings_.push (outname);
94 Paper_outputter * po = new Paper_outputter (outname);
95 Path p = split_path (outname);
97 po->basename_ = p.to_string ();
104 Paper_def::find_scaled_font (Font_metric *f, Real m)
106 SCM sizes = scm_hashq_ref (scaled_fonts_, f->self_scm (), SCM_BOOL_F);
107 if (sizes != SCM_BOOL_F)
109 SCM met = scm_assoc (gh_double2scm (m), sizes);
111 return unsmob_metrics (ly_cdr (met));
120 Hmm. We're chaining font - metrics. Should consider wether to merge
121 virtual-font and scaled_font.
124 if (Virtual_font_metric * vf = dynamic_cast<Virtual_font_metric*> (f))
127 For fontify_atom (), the magnification and name must be known
128 at the same time. That's impossible for
130 Scaled (Virtual_font (Font1,Font2))
134 Virtual_font (Scaled (Font1), Scaled (Font2))
139 for (SCM s = vf->get_font_list (); gh_pair_p (s); s = gh_cdr (s))
142 = find_scaled_font (unsmob_metrics (gh_car (s)), m);
143 *t = scm_cons (scaled->self_scm (), SCM_EOL);
147 vf = new Virtual_font_metric (l);
148 val = vf->self_scm ();
152 SCM scale_var = ly_module_lookup (scope_, ly_symbol2scm ("outputscale"));
154 m /= gh_scm2double (scm_variable_ref (scale_var));
156 val = Modified_font_metric::make_scaled_font_metric (f, m);
159 sizes = scm_acons (gh_double2scm (m), val, sizes);
160 scm_gc_unprotect_object (val);
162 scm_hashq_set_x (scaled_fonts_, f->self_scm (), sizes);
164 return unsmob_metrics (val);
170 Return alist to translate internally used fonts back to real-world
173 Paper_def::font_descriptions () const
175 SCM func = ly_scheme_function ("hash-table->alist");
178 for (SCM s = scm_call_1 (func, scaled_fonts_); gh_pair_p (s); s = ly_cdr (s))
180 SCM entry = gh_car (s);
181 for (SCM t = gh_cdr (entry); gh_pair_p (t); t = gh_cdr (t))
183 Font_metric *fm= unsmob_metrics (gh_cdar (t));
185 if (dynamic_cast<Modified_font_metric*> (fm))
186 l = gh_cons (fm->self_scm (), l);
195 return dynamic_cast<Paper_def*> (unsmob_music_output_def (x));
199 LY_DEFINE (ly_paper_def_p, "ly:paper-def?",
201 "Is @var{def} a paper definition?")
203 Paper_def *op = dynamic_cast<Paper_def*> (unsmob_music_output_def (def));
206 return gh_bool2scm (pap);