-#include "paper-def.hh"
-#include "font-interface.hh"
-#include "warn.hh"
-
-
/*
- TODO revise font handling.
-
+ This file is part of LilyPond, the GNU music typesetter.
-* relative sizes should relate to staff-space, eg. font-staff-space
-= 1.2 ^ relative-size
+ Copyright (C) 2003--2014 Han-Wen Nienhuys <hanwen@xs4all.nl>
-* If a relative size is given, lily should magnify the closest
-design size font to match that. (ie. fonts should have variable
-scaling)
+ LilyPond 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.
-(this requires that fonts are stored as (filename , designsize))
+ LilyPond is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+ You should have received a copy of the GNU General Public License
+ along with LilyPond. If not, see <http://www.gnu.org/licenses/>.
+*/
-
- */
+#include "dimensions.hh"
+#include "all-font-metrics.hh"
+#include "output-def.hh"
+#include "font-interface.hh"
+#include "warn.hh"
+#include "pango-font.hh"
+#include "main.hh"
+Font_metric *
+get_font_by_design_size (Output_def *layout, Real requested,
+ SCM font_vector)
+{
+ int n = scm_c_vector_length (font_vector);
+ Real size = 1e6;
+ Real last_size = -1e6;
+ int i = 0;
+
+ SCM pango_description_string = SCM_EOL;
+ SCM last_pango_description_string = SCM_EOL;
+ for (; i < n; i++)
+ {
+ SCM entry = scm_c_vector_ref (font_vector, i);
+
+ if (scm_promise_p (entry) == SCM_BOOL_T)
+ {
+ Font_metric *fm = unsmob_metrics (scm_force (entry));
+ size = fm->design_size ();
+ }
+#if HAVE_PANGO_FT2
+ else if (scm_is_pair (entry)
+ && scm_is_number (scm_car (entry))
+ && scm_is_string (scm_cdr (entry)))
+ {
+ size = scm_to_double (scm_car (entry));
+ pango_description_string
+ = scm_cdr (entry);
+ }
+#endif
+
+ if (size > requested)
+ break;
+ last_size = size;
+ last_pango_description_string = pango_description_string;
+ }
+ if (i == n)
+ i = n - 1;
+ else if (i > 0)
+ {
+ if ((requested / last_size) < (size / requested))
+ {
+ i--;
+ size = last_size;
+ pango_description_string = last_pango_description_string;
+ }
+ }
+ Font_metric *fm = 0;
+ if (scm_is_string (pango_description_string))
+ {
+#if HAVE_PANGO_FT2
+ return find_pango_font (layout,
+ pango_description_string,
+ requested / size);
+#else
+ error ("Trying to retrieve pango font without HAVE_PANGO_FT2.");
+#endif
+ }
+ else
+ fm = unsmob_metrics (scm_force (scm_c_vector_ref (font_vector, i)));
-LY_DEFINE(ly_paper_get_font,"ly:paper-get-font", 2, 0, 0,
- (SCM paper, SCM chain),
- "Return a font metric satisfying the font-qualifiers in the alist chain @var{chain}.\n"
-"\n"
-"The font object represents the metric information of a font. Every font\n"
-"that is loaded into LilyPond can be accessed via Scheme. \n"
-"\n"
-"LilyPond only needs to know the dimension of glyph to be able to process\n"
-"them. This information is stored in font metric files. LilyPond can read\n"
-"two types of font-metrics: @TeX{} Font Metric files (TFM files) and\n"
-"Adobe Font Metric files (AFM files). LilyPond will always try to load\n"
-"AFM files first since they are more versatile.\n"
-"\n"
-"An alist chain is a list of alists, containing grob properties.\n")
-{
- Paper_def *pap = unsmob_paper (paper);
- SCM_ASSERT_TYPE(pap, paper, SCM_ARG1, __FUNCTION__, "paper definition");
-
- Font_metric*fm = select_font (pap, chain);
- return fm->self_scm();
+ return find_scaled_font (layout, fm, requested / size);
}
-
-bool
-wild_compare (SCM field_val, SCM val)
+Font_metric *
+get_font_by_mag_step (Output_def *layout, Real requested_step,
+ SCM font_vector, Real default_size)
{
- return (val == SCM_BOOL_F || field_val == ly_symbol2scm ("*") || field_val == val);
+ return get_font_by_design_size (layout, default_size
+ * pow (2.0, requested_step / 6.0),
+ font_vector);
}
-/*
- We can probably get more efficiency points if we preprocess FONTS
- to make lookup easier.
- */
SCM
-properties_to_font_name (SCM fonts, SCM alist_chain)
+properties_to_font_size_family (SCM fonts, SCM alist_chain)
{
- SCM shape = SCM_BOOL_F;
- SCM family = SCM_BOOL_F;
- SCM series = SCM_BOOL_F;
-
-
- SCM point_sz = ly_assoc_chain (ly_symbol2scm ("font-design-size"), alist_chain);
- SCM rel_sz = SCM_BOOL_F;
-
- shape = ly_assoc_chain (ly_symbol2scm ("font-shape"), alist_chain);
- family = ly_assoc_chain (ly_symbol2scm ("font-family"), alist_chain);
- series = ly_assoc_chain (ly_symbol2scm ("font-series"), alist_chain);
-
- if (gh_pair_p (shape))
- shape = ly_cdr (shape);
- if (gh_pair_p (family))
- family = ly_cdr (family);
- if (gh_pair_p (series))
- series = ly_cdr (series);
+ return scm_call_2 (ly_lily_module_constant ("lookup-font"), fonts,
+ alist_chain);
+}
+Font_metric *
+select_encoded_font (Output_def *layout, SCM chain)
+{
+ SCM name = ly_chain_assoc_get (ly_symbol2scm ("font-name"), chain, SCM_BOOL_F);
- if (gh_pair_p (point_sz))
- point_sz = ly_cdr (point_sz);
- else
+ if (!scm_is_string (name))
{
- rel_sz = ly_assoc_chain (ly_symbol2scm ("font-relative-size"), alist_chain);
- if (gh_pair_p (rel_sz))
- rel_sz = ly_cdr (rel_sz);
+ SCM fonts = layout->lookup_variable (ly_symbol2scm ("fonts"));
+ name = properties_to_font_size_family (fonts, chain);
}
- for (SCM s = fonts ; gh_pair_p (s); s = ly_cdr (s))
- {
- SCM qlist = ly_caar (s);
-
- if (!wild_compare (scm_list_ref (qlist, gh_int2scm (1)), series))
- continue;
- if (!wild_compare (scm_list_ref (qlist, gh_int2scm (2)), shape))
- continue;
- if (!wild_compare (scm_list_ref (qlist, gh_int2scm (3)), family))
- continue;
-
- if (point_sz == SCM_BOOL_F && !wild_compare (ly_car (qlist), rel_sz))
- continue;
-
- SCM qname = ly_cdar (s);
- return qname;
- }
+#if HAVE_PANGO_FT2
+ if (scm_is_string (name))
+ return select_pango_font (layout, chain);
+ else
+#endif
+ if (scm_is_true (scm_instance_p (name)))
+ {
+ SCM base_size = scm_slot_ref (name, ly_symbol2scm ("default-size"));
+ SCM vec = scm_slot_ref (name, ly_symbol2scm ("size-vector"));
- warning (_ ("couldn't find any font satisfying "));
- scm_write (scm_list_n (point_sz, shape, series , family, rel_sz,
- SCM_UNDEFINED), scm_current_error_port ());
- scm_flush (scm_current_error_port ());
-
- return scm_makfrom0str ("cmr10");
-
-}
+ Real req = robust_scm2double (ly_chain_assoc_get (ly_symbol2scm ("font-size"), chain, SCM_BOOL_F),
+ 0.0);
+ return get_font_by_mag_step (layout, req, vec,
+ scm_to_double (base_size));
+ }
+
+ assert (0);
+ return 0;
+}
Font_metric *
-select_font (Paper_def *paper, SCM chain)
+select_font (Output_def *layout, SCM chain)
{
- SCM name = ly_assoc_chain (ly_symbol2scm ("font-name"), chain);
-
- if (!gh_pair_p (name) || !gh_string_p (gh_cdr (name)))
- {
- SCM fonts = paper->lookup_variable (ly_symbol2scm ("fonts"));
- name = properties_to_font_name (fonts, chain);
- }
- else
- name = gh_cdr (name);
-
- SCM mag = ly_assoc_chain (ly_symbol2scm ("font-magnification"), chain);
-
- Real rmag = gh_pair_p (mag) && gh_number_p (gh_cdr (mag))
- ? gh_scm2double (gh_cdr (mag)) : 1.0;
-
- Font_metric *fm = paper->find_font (name, rmag);
- return fm;
+ return select_encoded_font (layout, chain);
}
projects / lilypond.git / blobdiff