source file of the GNU LilyPond music typesetter
(c) 2004 Han-Wen Nienhuys <hanwen@xs4all.nl>
-
*/
+#include <map>
+#include <stdio.h>
+
+#include <freetype/tttables.h>
+
#include "warn.hh"
#include "open-type-font.hh"
+#include "dimensions.hh"
+#include "modified-font-metric.hh"
-#include <stdio.h>
+FT_Byte *
+load_table (char const *tag_str, FT_Face face, FT_ULong *length)
+{
+ FT_ULong tag = FT_MAKE_TAG (tag_str[0], tag_str[1], tag_str[2], tag_str[3]);
-#if 0
+ int error_code = FT_Load_Sfnt_Table (face, tag, 0, NULL, length);
+ if (!error_code)
+ {
+ FT_Byte *buffer = (FT_Byte*) malloc (*length);
+ if (buffer == NULL)
+ error (_f ("Cannot allocate %d bytes", *length));
-void
-enumerate_glyphs (FT_Face face)
+ error_code = FT_Load_Sfnt_Table (face, tag, 0, buffer, length );
+ if (error_code)
+ error (_f ("Could not load %s font table", tag_str));
+
+ return buffer;
+ }
+
+ return 0;
+}
+
+SCM
+load_scheme_table (char const *tag_str, FT_Face face)
+{
+ FT_ULong length = 0;
+ FT_Byte *buffer = load_table (tag_str, face, &length);
+
+ SCM tab = SCM_EOL;
+ if (buffer)
+ {
+ String contents ((Byte const*)buffer, length);
+ contents = "(quote (" + contents + "))";
+
+ tab = scm_c_eval_string (contents.to_str0 ());
+ free (buffer);
+ }
+ return tab;
+}
+
+Index_to_charcode_map
+make_index_to_charcode_map (FT_Face face)
{
- FT_UInt glyph_index;
- FT_ULong char_code = FT_Get_First_Char (face, &glyph_index);
- while (gindex != 0)
- {
- // ... do something with (charcode,gindex) pair ...
- FT_Get
- charcode = FT_Get_Next_Char( face, charcode, &gindex );
- }
+ Index_to_charcode_map m;
+ FT_ULong charcode;
+ FT_UInt gindex;
+
+ for (charcode = FT_Get_First_Char (face, &gindex); gindex != 0;
+ charcode = FT_Get_Next_Char (face, charcode, &gindex))
+ m[gindex] = charcode;
+ return m;
}
-#endif
+Open_type_font::~Open_type_font()
+{
+ FT_Done_Face (face_);
+}
SCM
Open_type_font::make_otf (String str)
{
- Open_type_font * otf = new Open_type_font;
- int error_code = FT_New_Face(freetype2_library, str.to_str0(),
- 0, &(otf->face_));
-
- // int code = FT_Set_Charmap (otf->face_, );
+ FT_Face face;
+ int error_code = FT_New_Face(freetype2_library, str.to_str0 (), 0, &face);
-
if (error_code == FT_Err_Unknown_File_Format)
{
- error("Unsupported font format");
+ error (_f ("Unsupported font format: %s", str.to_str0 ()));
}
else if (error_code)
{
- error ("Unknown error reading font file.");
+ error (_f ("Unknown error: %d reading font file: %s", error_code,
+ str.to_str0 ()));
}
+ Open_type_font *otf = new Open_type_font (face);
+
return otf->self_scm ();
}
-Open_type_font::~Open_type_font()
+Open_type_font::Open_type_font (FT_Face face)
{
- FT_Done_Face (face_);
+ face_ = face;
+ lily_character_table_ = SCM_EOL;
+ lily_global_table_ = SCM_EOL;
+ lily_subfonts_ = SCM_EOL;
+
+ lily_character_table_ = alist_to_hashq (load_scheme_table ("LILC", face_));
+ lily_global_table_ = alist_to_hashq (load_scheme_table ("LILY", face_));
+ lily_subfonts_ = load_scheme_table ("LILF", face_);
+ index_to_charcode_map_ = make_index_to_charcode_map (face_);
}
+void
+Open_type_font::derived_mark () const
+{
+ scm_gc_mark (lily_character_table_);
+ scm_gc_mark (lily_global_table_);
+ scm_gc_mark (lily_subfonts_);
+}
+
+Offset
+Open_type_font::attachment_point (String glyph_name) const
+{
+ SCM sym = ly_symbol2scm (glyph_name.to_str0 ());
+ SCM entry = scm_hashq_ref (lily_character_table_, sym, SCM_BOOL_F);
+
+ Offset o;
+ if (entry == SCM_BOOL_F)
+ return o;
+
+ SCM char_alist = entry;
+ SCM att_scm = scm_cdr (scm_assq (ly_symbol2scm ("attachment"), char_alist));
+
+ return point_constant * ly_scm2offset (att_scm);
+}
Box
-Open_type_font::get_indexed_char (int signed_idx)
+Open_type_font::get_indexed_char (int signed_idx) const
{
- FT_UInt idx = signed_idx;
- int code =
- FT_Load_Glyph (face_,
- idx,
- FT_LOAD_NO_SCALE);
-
- FT_Glyph_Metrics m = face->glyph->metrics;
- Box b (Interval (0, m->width) - m->horiBearingX,
- Interval (0, m->height) - m->horiBearingY);
+ if (SCM_HASHTABLE_P (lily_character_table_))
+ {
+ const int len =256;
+ char name[len];
+ int code = FT_Get_Glyph_Name (face_, signed_idx, name, len);
+ if (code)
+ warning (_f ("FT_Get_Glyph_Name() returned error: %d", code));
+
+ SCM sym = ly_symbol2scm (name);
+ SCM alist = scm_hashq_ref (lily_character_table_, sym, SCM_BOOL_F);
+
+ if (alist != SCM_BOOL_F)
+ {
+ SCM bbox = scm_cdr (scm_assq (ly_symbol2scm ("bbox"), alist));
+
+ Box b;
+ b[X_AXIS][LEFT] = scm_to_double (scm_car (bbox));
+ bbox = scm_cdr (bbox);
+ b[Y_AXIS][LEFT] = scm_to_double (scm_car (bbox));
+ bbox = scm_cdr (bbox);
+ b[X_AXIS][RIGHT] = scm_to_double (scm_car (bbox));
+ bbox = scm_cdr (bbox);
+ b[Y_AXIS][RIGHT] = scm_to_double (scm_car (bbox));
+ bbox = scm_cdr (bbox);
+
+ b.scale (point_constant);
+ return b;
+ }
+ }
+ FT_UInt idx = signed_idx;
+ FT_Load_Glyph (face_,
+ idx,
+ FT_LOAD_NO_SCALE);
+
+ FT_Glyph_Metrics m = face_->glyph->metrics;
+ int hb = m.horiBearingX;
+ int vb = m.horiBearingY;
+ Box b (Interval (-hb, m.width - hb),
+ Interval (-vb, m.height - vb));
+
+ b.scale (design_size () / Real (face_->units_per_EM));
return b;
}
int
-Open_type_font::name_to_index (String nm)
+Open_type_font::name_to_index (String nm) const
{
- FT_String * nm_str = nm.to_str0 ();
- int idx = FT_Get_Name_Index (face_, nm_str);
-
- if (idx == 0)
- return -1;
- else
+ char *nm_str = (char*) nm.to_str0 ();
+ if (int idx = FT_Get_Name_Index (face_, nm_str))
return idx;
+ return -1;
}
+unsigned
+Open_type_font::index_to_charcode (int i) const
+{
+ return ((Open_type_font*) this)->index_to_charcode_map_[i];
+}
+
+int
+Open_type_font::count () const
+{
+ return ((Open_type_font*) this)->index_to_charcode_map_.size ();
+}
Real
-Open_type_font::get_design_size () const
+Open_type_font::design_size () const
+{
+ SCM entry = scm_hashq_ref (lily_global_table_,
+ ly_symbol2scm ("design_size"),
+
+ /*
+ Hmm. Design size is arbitrary for
+ non-design-size fonts. I vote for 1 -
+ which will trip errors more
+ quickly. --hwn.
+ */
+ scm_from_int (1));
+ return scm_to_double (entry) * Real (point_constant);
+}
+
+
+SCM
+Open_type_font::sub_fonts () const
+{
+ return lily_subfonts_;
+}
+
+LY_DEFINE (ly_font_sub_fonts, "ly:font-sub-fonts", 1, 0, 0,
+ (SCM font),
+ "Given the font metric @var{font} of an OpenType font, return the "
+ "names of the subfonts within @var{font}.")
+{
+ Font_metric *fm = unsmob_metrics (font);
+ SCM_ASSERT_TYPE (fm, font, SCM_ARG1, __FUNCTION__, "font-metric");
+ return fm->sub_fonts ();
+}
+
+LY_DEFINE (ly_otf_font_glyph_info, "ly:otf-font-glyph-info", 2, 0, 0,
+ (SCM font, SCM glyph),
+ "Given the font metric @var{font} of an OpenType font, return the "
+ "information about named glyph @var{glyph} (a string)")
{
- return 20.0;
+ Modified_font_metric * fm
+ = dynamic_cast<Modified_font_metric*> (unsmob_metrics (font));
+ Open_type_font * otf = dynamic_cast<Open_type_font*> (fm->original_font ());
+ SCM_ASSERT_TYPE (otf, font, SCM_ARG1, __FUNCTION__, "OTF font-metric");
+ SCM_ASSERT_TYPE (scm_is_string (glyph), glyph, SCM_ARG1,
+ __FUNCTION__, "string");
+
+ SCM sym = scm_string_to_symbol (glyph);
+ return scm_hashq_ref (otf->get_char_table (), sym, SCM_EOL);
}
+
+SCM
+Open_type_font::get_char_table () const
+{
+ return lily_character_table_;
+}
+
+SCM
+Open_type_font::get_subfonts () const
+{
+ return lily_subfonts_;
+}
+
+SCM
+Open_type_font::get_global_table () const
+{
+ return lily_global_table_;
+}
+
+String
+Open_type_font::font_name () const
+{
+ return FT_Get_Postscript_Name (face_);
+}
+
projects / lilypond.git / blobdiff