X-Git-Url: https://git.donarmstrong.com/?a=blobdiff_plain;f=lily%2Fopen-type-font.cc;h=76bbff86ed0cfdb762a70d3da57bdd9c4647f459;hb=f3359a43fe1cec979090721f07af6c7cbc7f8e0c;hp=b870342cba633cec288a1a1379733dc7d113c2ff;hpb=c3d6497157576dc0d4ae77c44978d54e7a212074;p=lilypond.git diff --git a/lily/open-type-font.cc b/lily/open-type-font.cc index b870342cba..76bbff86ed 100644 --- a/lily/open-type-font.cc +++ b/lily/open-type-font.cc @@ -1,74 +1,345 @@ /* - open-type-font.cc -- implement Open_type_font + This file is part of LilyPond, the GNU music typesetter. - source file of the GNU LilyPond music typesetter + Copyright (C) 2004--2012 Han-Wen Nienhuys - (c) 2004 Han-Wen Nienhuys + 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 . */ -#include "warn.hh" #include "open-type-font.hh" +#include "freetype.hh" -#include +#include -SCM -Open_type_font::make_otf (String str) +using namespace std; + +#include FT_TRUETYPE_TABLES_H + +#include "dimensions.hh" +#include "freetype.hh" +#include "international.hh" +#include "modified-font-metric.hh" +#include "warn.hh" + +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]); + + FT_Error 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 ("cannot allocate %lu bytes", *length)); + + error_code = FT_Load_Sfnt_Table (face, tag, 0, buffer, length); + if (error_code) + error (_f ("cannot load font table: %s", tag_str)); + + return buffer; } - else if (error_code) + else + programming_error (_f ("FreeType error: %s", + freetype_error_string (error_code).c_str () + )); + + return 0; +} + +string +Open_type_font::get_otf_table (const 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 ((char const *)buffer, length); + contents = "(quote (" + contents + "))"; + + tab = scm_c_eval_string (contents.c_str ()); + free (buffer); } + return tab; +} + +Open_type_font::~Open_type_font () +{ + FT_Done_Face (face_); +} + +/* + UGH fix naming +*/ +string +get_otf_table (FT_Face face, const string &tag) +{ + FT_ULong len; + FT_Byte *tab = load_table (tag.c_str (), face, &len); + string ret ((char const *) tab, len); + free (tab); + + return ret; +} + +FT_Face +open_ft_face (const string &str, FT_Long idx) +{ + FT_Face face; + FT_Error error_code = FT_New_Face (freetype2_library, str.c_str (), idx, &face); + + if (error_code == FT_Err_Unknown_File_Format) + error (_f ("unsupported font format: %s", str.c_str ())); + else if (error_code) + error (_f ("error reading font file %s: %s", + str.c_str (), + freetype_error_string (error_code).c_str ())); + return face; +} + +SCM +Open_type_font::make_otf (const string &str) +{ + FT_Face face = open_ft_face (str, 0 /* index */); + 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_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 (const string &glyph_name) const +{ + SCM sym = ly_symbol2scm (glyph_name.c_str ()); + 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 -{ - 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)); - +Open_type_font::get_indexed_char_dimensions (size_t signed_idx) const +{ + if (SCM_HASHTABLE_P (lily_index_to_bbox_table_)) + { + SCM box = scm_hashq_ref (lily_index_to_bbox_table_, + scm_from_unsigned_integer (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 size_t len = 256; + char name[len]; + FT_Error code = FT_Get_Glyph_Name (face_, FT_UInt (signed_idx), + name, FT_UInt (len)); + if (code) + warning (_f ("FT_Get_Glyph_Name () Freetype error: %s", + freetype_error_string (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_unsigned_integer (signed_idx), + b.smobbed_copy ()); + return b; + } + } + + Box b = get_unscaled_indexed_char_dimensions (signed_idx); + + b.scale (design_size () / Real (face_->units_per_EM)); return b; } -int -Open_type_font::name_to_index (String nm) const +Real +Open_type_font::get_units_per_EM () const +{ + return face_->units_per_EM; +} + +size_t +Open_type_font::name_to_index (string nm) const +{ + char *nm_str = (char *) nm.c_str (); + if (FT_UInt idx = FT_Get_Name_Index (face_, nm_str)) + return (size_t) idx; + + return (size_t) - 1; +} + +Box +Open_type_font::get_unscaled_indexed_char_dimensions (size_t signed_idx) const +{ + return ly_FT_get_unscaled_indexed_char_dimensions (face_, signed_idx); +} + +Box +Open_type_font::get_glyph_outline_bbox (size_t signed_idx) const { - char * nm_str = (char * )nm.to_str0 (); - int idx = FT_Get_Name_Index (face_, nm_str); + return ly_FT_get_glyph_outline_bbox (face_, signed_idx); +} - if (idx == 0) - return -1; +SCM +Open_type_font::get_glyph_outline (size_t signed_idx) const +{ + return ly_FT_get_glyph_outline (face_, signed_idx); +} + +size_t +Open_type_font::index_to_charcode (size_t i) const +{ + map::const_iterator iter; + iter = index_to_charcode_map_.find (FT_UInt (i)); + + if (iter != index_to_charcode_map_.end ()) + return (size_t) iter->second; else - return idx; + { + programming_error ("Invalid index for character"); + return 0; + } } +size_t +Open_type_font::count () const +{ + return 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_unsigned_integer (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_); +} + +SCM +Open_type_font::glyph_list () const +{ + SCM retval = SCM_EOL; + SCM *tail = &retval; + + for (int i = 0; i < face_->num_glyphs; i++) + { + const size_t len = 256; + char name[len]; + FT_Error code = FT_Get_Glyph_Name (face_, i, name, len); + if (code) + warning (_f ("FT_Get_Glyph_Name () error: %s", + freetype_error_string (code).c_str ())); + + *tail = scm_cons (scm_from_locale_string (name), SCM_EOL); + tail = SCM_CDRLOC (*tail); + } + + return retval; }