X-Git-Url: https://git.donarmstrong.com/?a=blobdiff_plain;f=lily%2Fopen-type-font.cc;h=f39d924a6852fdcf917c2a91539a4dcc3e27d6f7;hb=16d17361945fa0264a607f7a1409c35ce7ac97b8;hp=03dfa0c6dfb0d7b25239cbe2ffb0af627091be8b;hpb=085f80bad751ed2ab6f146884271ade8633389e0;p=lilypond.git diff --git a/lily/open-type-font.cc b/lily/open-type-font.cc index 03dfa0c6df..f39d924a68 100644 --- a/lily/open-type-font.cc +++ b/lily/open-type-font.cc @@ -1,48 +1,78 @@ /* - 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--2015 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 -#include +#include "open-type-font.hh" +#include "freetype.hh" -#include +#ifdef FT_FONT_FORMATS_H +/* FreeType 2.6+ */ +#include FT_FONT_FORMATS_H +#else +/* FreeType 2.5.5 and earlier */ +#include FT_XFREE86_H +#define FT_Get_Font_Format FT_Get_X11_Font_Format +#endif + +#include + +using namespace std; + +#include FT_TRUETYPE_TABLES_H -#include "warn.hh" -#include "open-type-font.hh" #include "dimensions.hh" +#include "international.hh" #include "modified-font-metric.hh" - -const Real point_constant = 1 PT; +#include "warn.hh" 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]); + *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); + FT_Error error_code = FT_Load_Sfnt_Table (face, tag, 0, NULL, length); if (!error_code) { - FT_Byte *buffer = (FT_Byte*) malloc (*length); + FT_Byte *buffer = (FT_Byte *) malloc (*length); if (buffer == NULL) - error (_f ("Cannot allocate %d bytes", *length)); + error (_f ("cannot allocate %lu bytes", *length)); - error_code = FT_Load_Sfnt_Table (face, tag, 0, buffer, length ); + error_code = FT_Load_Sfnt_Table (face, tag, 0, buffer, length); if (error_code) - { - error (_f ("Could not load %s font table", tag_str)); - } + error (_f ("cannot load font table: %s", tag_str)); return buffer; } + 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) { @@ -52,50 +82,170 @@ load_scheme_table (char const *tag_str, FT_Face face) SCM tab = SCM_EOL; if (buffer) { - String contents ((Byte const*)buffer, length); - contents = "(quote (" + contents + "))"; - - tab = scm_c_eval_string (contents.to_str0 ()); + string contents ((char const *)buffer, length); + contents = "(quote (" + contents + "))"; + +#if GUILEV2 + tab = scm_eval_string (scm_from_utf8_string (contents.c_str ())); +#else + tab = scm_c_eval_string (contents.c_str ()); +#endif free (buffer); } return tab; } - -Index_to_charcode_map -make_index_to_charcode_map (FT_Face face) +Open_type_font::~Open_type_font () { - 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; + FT_Done_Face (face_); } -Open_type_font::~Open_type_font() +/* + UGH fix naming +*/ +string +get_otf_table (FT_Face face, const string &tag) { - FT_Done_Face (face_); + FT_ULong len; + FT_Byte *tab = load_table (tag.c_str (), face, &len); + string ret ((char const *) tab, len); + free (tab); + + return ret; } -SCM -Open_type_font::make_otf (String str) +FT_Face +open_ft_face (const string &str, FT_Long idx) { FT_Face face; - int error_code = FT_New_Face(freetype2_library, str.to_str0 (), 0, &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; +} + +string +get_postscript_name (FT_Face face) +{ + string face_ps_name; + const char *psname = FT_Get_Postscript_Name (face); + if (psname) + face_ps_name = psname; + else { - error (_f ("Unsupported font format: %s", str.to_str0 ())); + warning (_ ("cannot get postscript name")); + return ""; } - else if (error_code) + + const char *fmt = FT_Get_Font_Format (face); + if (fmt) + { + if (static_cast(fmt) != "CFF") + return face_ps_name; // For non-CFF font, pass it through. + } + else + { + warning (_f ("cannot get font %s format", face_ps_name.c_str ())); + return face_ps_name; + } + + // For OTF and OTC fonts, we use data from the font's 'CFF' table only + // because other tables are not embedded in the output PS file. + string cff_table = get_otf_table (face, "CFF "); + + FT_Open_Args args; + args.flags = FT_OPEN_MEMORY; + args.memory_base = static_cast + (static_cast(cff_table.data ())); + args.memory_size = cff_table.size (); + + FT_Face cff_face; + // According to OpenType Specification ver 1.7, + // the CFF (derived from OTF and OTC) has only one name. + // So we use zero as the font index. + FT_Error error_code = FT_Open_Face (freetype2_library, &args, + 0 /* font index */, + &cff_face); + if (error_code) + { + warning (_f ("cannot read CFF %s: %s", + face_ps_name, + freetype_error_string (error_code).c_str ())); + return face_ps_name; + } + + string ret; + const char *cffname = FT_Get_Postscript_Name (cff_face); + if (cffname) + ret = cffname; + else { - error (_f ("Unknown error: %d reading font file: %s", error_code, - str.to_str0 ())); + // FreeType 2.6 and 2.6.1 cannot get PS name from pure-CFF. + // (FreeType 2.5.5 and earlier does not have this issue. + // FreeType 2.6.2+ has this bug fixed.) + // So we need direct parsing of the 'CFF' table, in this case. + + debug_output (_f ("Directly parsing 'CFF' table of font %s.", + face_ps_name.c_str ())); + + // See Adobe technote '5176.CFF.pdf', sections 2 and 5-7. + size_t hdrsize = static_cast(cff_table.at(2)); + string::iterator it = cff_table.begin () + hdrsize; + + unsigned int name_index_count; + name_index_count = static_cast(*it++) << 8; + name_index_count |= static_cast(*it++); + + size_t offsize = static_cast(*it++); + + if (name_index_count && 1 <= offsize && offsize <= 4) + { + // We get the first name in the CFF's name index + // because this CFF (derived from OTF and OTC) + // has only one name. + size_t off1 = 0, off2 = 0; + for (size_t t = 0; t < offsize; t++) + off1 = ( off1 << 8 ) | static_cast(*it++); + if (off1) + { + for (size_t t = 0; t < offsize; t++) + off2 = ( off2 << 8 ) | static_cast(*it++); + } + if (off1 && off1 < off2) + { + ret.assign (&cff_table.at(hdrsize + 3 + + offsize * (name_index_count + 1) + + off1 - 1), + &cff_table.at(hdrsize + 3 + + offsize * (name_index_count + 1) + + off2 - 1)); + } + } + + if (ret.empty ()) + { + warning (_f ("cannot get font %s CFF name", face_ps_name.c_str ())); + ret = face_ps_name; + } } + debug_output (_f ("Replace font name from %s to %s.", + face_ps_name.c_str (), ret.c_str ())); + + FT_Done_Face (cff_face); + + return ret; +} + +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 (); @@ -107,11 +257,16 @@ Open_type_font::Open_type_font (FT_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); + + postscript_name_ = get_postscript_name (face_); } void @@ -120,140 +275,154 @@ 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 +Open_type_font::attachment_point (const string &glyph_name) const { - SCM sym = ly_symbol2scm (glyph_name.to_str0 ()); + 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) + if (scm_is_false (entry)) 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 +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 = unsmob (box); + if (box_ptr) + return *box_ptr; + } + if (SCM_HASHTABLE_P (lily_character_table_)) { - const int len =256; + const size_t len = 256; char name[len]; - int code = FT_Get_Glyph_Name (face_, signed_idx, 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() returned error: %d", 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); - return b; - } + + if (scm_is_true (alist)) + { + 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; + } } - - 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 (point_constant) / face_->units_per_EM); + + 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 { - char *nm_str = (char*) nm.to_str0 (); - if (int idx = FT_Get_Name_Index (face_, nm_str)) - return idx; - return -1; + return face_->units_per_EM; } -unsigned -Open_type_font::index_to_charcode (int i) const +size_t +Open_type_font::name_to_index (string nm) const { - return ((Open_type_font*) this)->index_to_charcode_map_[i]; + 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; } -int -Open_type_font::count () const +Box +Open_type_font::get_unscaled_indexed_char_dimensions (size_t signed_idx) const { - return ((Open_type_font*) this)->index_to_charcode_map_.size (); + return ly_FT_get_unscaled_indexed_char_dimensions (face_, signed_idx); } -Real -Open_type_font::design_size () const +Box +Open_type_font::get_glyph_outline_bbox (size_t signed_idx) 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); + return ly_FT_get_glyph_outline_bbox (face_, signed_idx); } - SCM -Open_type_font::sub_fonts () const +Open_type_font::get_glyph_outline (size_t signed_idx) const { - return lily_subfonts_; + 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 + { + programming_error ("Invalid index for character"); + return 0; + } } -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}.") +size_t +Open_type_font::count () const { - Font_metric *fm = unsmob_metrics (font); - SCM_ASSERT_TYPE (fm, font, SCM_ARG1, __FUNCTION__, "font-metric"); - return fm->sub_fonts (); + return index_to_charcode_map_.size (); } -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)") +Real +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_integer (1)); + return scm_to_double (entry) * Real (point_constant); +} + +SCM +Open_type_font::sub_fonts () const { - Modified_font_metric * fm - = dynamic_cast (unsmob_metrics (font)); - Open_type_font * otf = dynamic_cast (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); + return lily_subfonts_; } SCM @@ -274,9 +443,30 @@ Open_type_font::get_global_table () const return lily_global_table_; } -String +string Open_type_font::font_name () const { - return FT_Get_Postscript_Name (face_); + return postscript_name_; } +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_ascii_string (name), SCM_EOL); + tail = SCM_CDRLOC (*tail); + } + + return retval; +}