X-Git-Url: https://git.donarmstrong.com/?a=blobdiff_plain;f=lily%2Fopen-type-font.cc;h=e20a2c4ce5ff26c3f569b165a237d9eb93bd2b0a;hb=aa23e460ca96734a29387c163e75db4f3980d13f;hp=f053f441b42e9afd7cbd8916d3c384b744e63190;hpb=a9e7fcacf0713d51b7a241a1e0459640578d5494;p=lilypond.git diff --git a/lily/open-type-font.cc b/lily/open-type-font.cc index f053f441b4..e20a2c4ce5 100644 --- a/lily/open-type-font.cc +++ b/lily/open-type-font.cc @@ -1,68 +1,290 @@ /* - 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--2005 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 "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 ("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) +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; - 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) +Open_type_font::name_to_index (String nm) const +{ + 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_; +} + +SCM +Open_type_font::get_char_table () const { - return 20.0; + 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_); +} +