/*
- pango-font.cc -- implement Pango_font
+ This file is part of LilyPond, the GNU music typesetter.
- source file of the GNU LilyPond music typesetter
+ Copyright (C) 2004--2011 Han-Wen Nienhuys <hanwen@xs4all.nl>
- (c) 2004--2009 Han-Wen Nienhuys <hanwen@xs4all.nl>
+ 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.
+
+ 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/>.
*/
-#define PANGO_ENABLE_BACKEND // ugh, why necessary?
+// Necessary for supporting pango_context_new() and
+// pango_context_set_font_map() in Pango < 1.22
+#define PANGO_ENABLE_BACKEND
+
#include <pango/pangoft2.h>
#include <freetype/ftxf86.h>
#if HAVE_PANGO_FT2
#include "stencil.hh"
-Pango_font::Pango_font (PangoFT2FontMap * /* fontmap */,
+Pango_font::Pango_font (PangoFT2FontMap *fontmap,
PangoFontDescription const *description,
Real output_scale)
{
physical_font_tab_ = scm_c_make_hash_table (11);
PangoDirection pango_dir = PANGO_DIRECTION_LTR;
- context_ = pango_ft2_get_context (PANGO_RESOLUTION,
- PANGO_RESOLUTION);
+ context_ = pango_context_new ();
+ pango_context_set_font_map (context_, PANGO_FONT_MAP (fontmap));
pango_description_ = pango_font_description_copy (description);
attribute_list_ = pango_attr_list_new ();
}
Stencil
-Pango_font::pango_item_string_stencil (PangoItem const *item,
- string str,
- bool tight_bbox) const
+Pango_font::pango_item_string_stencil (PangoGlyphItem const *glyph_item) const
{
const int GLYPH_NAME_LEN = 256;
char glyph_name[GLYPH_NAME_LEN];
- PangoAnalysis const *pa = &(item->analysis);
- PangoGlyphString *pgs = pango_glyph_string_new ();
- pango_shape (str.c_str () + item->offset,
- item->length, (PangoAnalysis*) pa, pgs);
+ PangoAnalysis const *pa = &(glyph_item->item->analysis);
+ PangoGlyphString *pgs = glyph_item->glyphs;
PangoRectangle logical_rect;
PangoRectangle ink_rect;
pango_glyph_string_extents (pgs, pa->font, &ink_rect, &logical_rect);
- PangoFcFont *fcfont = G_TYPE_CHECK_INSTANCE_CAST (pa->font,
- PANGO_TYPE_FC_FONT,
- PangoFcFont);
+ PangoFcFont *fcfont = PANGO_FC_FONT (pa->font);
FT_Face ftface = pango_fc_font_lock_face (fcfont);
- PangoRectangle const *which_rect = tight_bbox ? &ink_rect
- : &logical_rect;
-
Box b (Interval (PANGO_LBEARING (logical_rect),
PANGO_RBEARING (logical_rect)),
- Interval (-PANGO_DESCENT (*which_rect),
- PANGO_ASCENT (*which_rect)));
+ Interval (-PANGO_DESCENT (ink_rect),
+ PANGO_ASCENT (ink_rect)));
+
b.scale (scale_);
char const *ps_name_str0 = FT_Get_Postscript_Name (ftface);
PangoGlyph pg = pgi->glyph;
PangoGlyphGeometry ggeo = pgi->geometry;
+ /*
+ Zero-width characters are valid Unicode characters,
+ but glyph lookups need to be skipped.
+ */
+ if (!(pg ^ PANGO_GLYPH_EMPTY))
+ continue;
+
glyph_name[0] = '\0';
if (has_glyph_names)
{
- int errorcode = FT_Get_Glyph_Name (ftface, pg, glyph_name,
- GLYPH_NAME_LEN);
+ FT_Error errorcode = FT_Get_Glyph_Name (ftface, pg, glyph_name,
+ GLYPH_NAME_LEN);
if (errorcode)
programming_error (
_f ("FT_Get_Glyph_Name () error: %s",
*tail = scm_cons (scm_list_4 (scm_from_double (ggeo.width * scale_),
scm_from_double (ggeo.x_offset * scale_),
- scm_from_double (ggeo.y_offset * scale_),
+ scm_from_double (- ggeo.y_offset * scale_),
char_id),
SCM_EOL);
tail = SCM_CDRLOC (*tail);
return physical_font_tab_;
}
-Stencil
-Pango_font::word_stencil (string str) const
-{
- return text_stencil (str, true);
-}
+extern bool music_strings_to_paths;
Stencil
-Pango_font::text_stencil (string str) const
+Pango_font::text_stencil (Output_def * /* state */,
+ string str, bool music_string) const
{
- return text_stencil (str, false);
-}
-
-Stencil
-Pango_font::text_stencil (string str,
- bool tight) const
-{
- GList *items
- = pango_itemize (context_,
- str.c_str (),
- 0, str.length (), attribute_list_,
- NULL);
+ /*
+ The text assigned to a PangoLayout is automatically divided
+ into sections and reordered according to the Unicode
+ Bidirectional Algorithm, if necessary.
+ */
+ PangoLayout *layout = pango_layout_new (context_);
+ pango_layout_set_text (layout, str.c_str (), -1);
+ GSList *lines = pango_layout_get_lines (layout);
Stencil dest;
-
Real last_x = 0.0;
- Direction text_dir = RIGHT;
- for (GList *p = items; p; p = p->next)
- {
- PangoItem *item = (PangoItem *) p->data;
- if (item->analysis.level == PANGO_DIRECTION_RTL)
- text_dir = LEFT;
- }
-
- for (GList *ptr = items; ptr; ptr = ptr->next)
+ for (GSList *l = lines; l; l = l->next)
{
- PangoItem *item = (PangoItem *) ptr->data;
+ PangoLayoutLine *line = (PangoLayoutLine *) l->data;
+ GSList *layout_runs = line->runs;
- Stencil item_stencil = pango_item_string_stencil (item, str, tight);
-
- if (text_dir == RIGHT)
+ for (GSList *p = layout_runs; p; p = p->next)
{
+ PangoGlyphItem *item = (PangoGlyphItem *) p->data;
+ Stencil item_stencil = pango_item_string_stencil (item);
+
item_stencil.translate_axis (last_x, X_AXIS);
last_x = item_stencil.extent (X_AXIS)[RIGHT];
- }
- else if (text_dir == LEFT)
- dest.translate_axis (item_stencil.extent (X_AXIS)[RIGHT], X_AXIS);
#if 0 // Check extents.
- if (!item_stencil.extent_box ()[X_AXIS].is_empty ())
- {
- Stencil frame = Lookup::frame (item_stencil.extent_box (), 0.1, 0.1);
- Box empty;
- empty.set_empty ();
- Stencil dimless_frame (empty, frame.expr ());
- dest.add_stencil (frame);
- }
+ if (!item_stencil.extent_box ()[X_AXIS].is_empty ())
+ {
+ Stencil frame = Lookup::frame (item_stencil.extent_box (), 0.1, 0.1);
+ Box empty;
+ empty.set_empty ();
+ Stencil dimless_frame (empty, frame.expr ());
+ dest.add_stencil (frame);
+ }
#endif
- dest.add_stencil (item_stencil);
+ dest.add_stencil (item_stencil);
+ }
}
- // UGH. Should have flags per output format signifying supported
- // options.
string name = get_output_backend_name ();
- if (name != "ps" && name != "eps")
+ string output_mod = "scm output-" + name;
+ SCM mod = scm_c_resolve_module (output_mod.c_str ());
+
+ bool has_utf8_string = false;
+
+ if (ly_is_module (mod))
+ {
+ SCM utf8_string = ly_module_lookup (mod, ly_symbol2scm ("utf-8-string"));
+ /*
+ has_utf8_string should only be true when utf8_string is a
+ variable that is bound to a *named* procedure, i.e. not a
+ lambda expression.
+ */
+ if (utf8_string != SCM_BOOL_F
+ && scm_procedure_name (SCM_VARIABLE_REF (utf8_string)) != SCM_BOOL_F)
+ has_utf8_string = true;
+ }
+
+ bool to_paths = music_strings_to_paths;
+
+ /*
+ Backends with the utf-8-string expression use it when
+ 1) the -dmusic-strings-to-paths option is set
+ and `str' is not a music string, or
+ 2) the -dmusic-strings-to-paths option is not set.
+ */
+ if (has_utf8_string && ((to_paths && !music_string) || !to_paths))
{
// For Pango based backends, we take a shortcut.
SCM exp = scm_list_3 (ly_symbol2scm ("utf-8-string"),
return Stencil (b, exp);
}
- g_list_free (items);
-
return dest;
}
projects / lilypond.git / blobdiff