/*
- open-type-font.cc -- implement Open_type_font
+ open-type-font.cc -- implement Open_type_font
source file of the GNU LilyPond music typesetter
- (c) 2004 Han-Wen Nienhuys <hanwen@xs4all.nl>
-
+ (c) 2004--2005 Han-Wen Nienhuys <hanwen@xs4all.nl>
*/
-#include <stdio.h>
-
-#include "warn.hh"
#include "open-type-font.hh"
+
+#include <cstdio>
+using namespace std;
+
+#include <freetype/tttables.h>
+
#include "dimensions.hh"
+#include "modified-font-metric.hh"
+#include "warn.hh"
-SCM
-Open_type_font::make_otf (String str)
+FT_Byte *
+load_table (char const *tag_str, FT_Face face, FT_ULong *length)
{
- Open_type_font * otf = new Open_type_font;
- int error_code = FT_New_Face(freetype2_library, str.to_str0(),
- 0, &(otf->face_));
-
- if (error_code == FT_Err_Unknown_File_Format)
+ *length = 0;
+ FT_ULong tag = FT_MAKE_TAG (tag_str[0], tag_str[1], tag_str[2], tag_str[3]);
+
+ int error_code = FT_Load_Sfnt_Table (face, tag, 0, NULL, length);
+ if (!error_code)
{
- error("Unsupported font format");
+ FT_Byte *buffer = (FT_Byte *) malloc (*length);
+ if (buffer == NULL)
+ error (_f ("can't allocate %d bytes", *length));
+
+ error_code = FT_Load_Sfnt_Table (face, tag, 0, buffer, length);
+ if (error_code)
+ error (_f ("can't load font table: %s", tag_str));
+
+ return buffer;
}
- else if (error_code)
+ else
+ programming_error ("Cannot find OpenType table.");
+
+ return 0;
+}
+
+String
+Open_type_font::get_otf_table (String tag) const
+{
+ return ::get_otf_table (face_, tag);
+}
+
+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)
{
- error ("Unknown error reading font file.");
+ String contents ((Byte const *)buffer, length);
+ contents = "(quote (" + contents + "))";
+
+ tab = scm_c_eval_string (contents.to_str0 ());
+ free (buffer);
}
+ return tab;
+}
- return otf->self_scm ();
+Index_to_charcode_map
+make_index_to_charcode_map (FT_Face face)
+{
+ 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;
}
-Open_type_font::~Open_type_font()
+Open_type_font::~Open_type_font ()
{
FT_Done_Face (face_);
}
+/*
+ UGH fix naming
+*/
+String
+get_otf_table (FT_Face face, String tag)
+{
+ FT_ULong len;
+ FT_Byte *tab = load_table (tag.to_str0 (), face, &len);
+
+ return String (tab, len);
+}
+
+FT_Face
+open_ft_face (String str)
+{
+ 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 (_f ("unsupported font format: %s", str.to_str0 ()));
+ else if (error_code)
+ error (_f ("unknown error: %d reading font file: %s", error_code,
+ str.to_str0 ()));
+ return face;
+}
+
+SCM
+Open_type_font::make_otf (String str)
+{
+ FT_Face face = open_ft_face (str);
+ Open_type_font *otf = new Open_type_font (face);
+
+ return otf->self_scm ();
+}
+
+Open_type_font::Open_type_font (FT_Face face)
+{
+ face_ = face;
+ lily_character_table_ = SCM_EOL;
+ lily_global_table_ = SCM_EOL;
+ lily_subfonts_ = SCM_EOL;
+ lily_index_to_bbox_table_ = 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_);
+
+ lily_index_to_bbox_table_ = scm_c_make_hash_table (257);
+}
+
+void
+Open_type_font::derived_mark () const
+{
+ scm_gc_mark (lily_character_table_);
+ scm_gc_mark (lily_global_table_);
+ scm_gc_mark (lily_subfonts_);
+ scm_gc_mark (lily_index_to_bbox_table_);
+}
+
+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) const
{
+ if (SCM_HASHTABLE_P (lily_index_to_bbox_table_))
+ {
+ SCM box = scm_hashq_ref (lily_index_to_bbox_table_, scm_from_int (signed_idx), SCM_BOOL_F);
+ Box *box_ptr = Box::unsmob (box);
+ if (box_ptr)
+ return *box_ptr;
+ }
+
+ 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);
+
+ scm_hashq_set_x (lily_index_to_bbox_table_,
+ scm_from_int (signed_idx),
+ b.smobbed_copy ());
+ return b;
+ }
+ }
+
FT_UInt idx = signed_idx;
FT_Load_Glyph (face_,
idx,
Box b (Interval (-hb, m.width - hb),
Interval (-vb, m.height - vb));
- Real point_constant = 1 PT;
-
-
- b.scale (design_size() * Real (point_constant) / face_->units_per_EM);
+ b.scale (design_size () / Real (face_->units_per_EM));
return b;
}
int
Open_type_font::name_to_index (String nm) const
{
- char * nm_str = (char * )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::design_size () const
{
- return 20.0;
+ 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_;
+}
+
+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