X-Git-Url: https://git.donarmstrong.com/?a=blobdiff_plain;f=lily%2Fopen-type-font.cc;h=2f2e5fdaad3d50b7eb2cc755ef0083243487d596;hb=b64f901106efd0b554b531bda41aab57c5b8e57a;hp=b33031e04bb583fa8ab4c3894f15aeccdbbaa1b5;hpb=6d7cb5da867db7a077f02fb10f969394b11e7390;p=lilypond.git diff --git a/lily/open-type-font.cc b/lily/open-type-font.cc index b33031e04b..2f2e5fdaad 100644 --- a/lily/open-type-font.cc +++ b/lily/open-type-font.cc @@ -1,68 +1,304 @@ /* - 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 - + (c) 2004--2006 Han-Wen Nienhuys */ -#include "warn.hh" #include "open-type-font.hh" -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_)); +#include - // int code = FT_Set_Charmap (otf->face_, ); +using namespace std; - - if (error_code == FT_Err_Unknown_File_Format) +#include + +#include "dimensions.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) +{ + *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 ("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 ("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 ((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, 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 (string str) +{ + FT_Face face; + int error_code = FT_New_Face (freetype2_library, str.c_str (), 0, &face); + + if (error_code == FT_Err_Unknown_File_Format) + error (_f ("unsupported font format: %s", str.c_str ())); + else if (error_code) + error (_f ("unknown error: %d reading font file: %s", error_code, + str.c_str ())); + 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() +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 (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) +Open_type_font::get_indexed_char (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 (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]; + size_t code = FT_Get_Glyph_Name (face_, signed_idx, name, len); + if (code) + warning (_f ("FT_Get_Glyph_Name() returned error: %u", unsigned (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 (signed_idx), + b.smobbed_copy ()); + return b; + } + } + 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); - + 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) +size_t +Open_type_font::name_to_index (string nm) const { - return 0; + char *nm_str = (char *) nm.c_str (); + if (size_t idx = FT_Get_Name_Index (face_, nm_str)) + return idx; + + return (size_t) -1; } +size_t +Open_type_font::index_to_charcode (size_t i) const +{ + return ((Open_type_font *) this)->index_to_charcode_map_[i]; +} + +size_t +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_unsigned (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 20.0; + 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]; + size_t code = FT_Get_Glyph_Name (face_, i, name, len); + if (code) + warning (_f ("FT_Get_Glyph_Name() returned error: %u", unsigned (code))); + + *tail = scm_cons (scm_makfrom0str (name), SCM_EOL); + tail = SCM_CDRLOC (*tail); + } + + return retval; }