2 This file is part of LilyPond, the GNU music typesetter.
4 Copyright (C) 2005--2015 Han-Wen Nienhuys <hanwen@xs4all.nl>
6 LilyPond is free software: you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation, either version 3 of the License, or
9 (at your option) any later version.
11 LilyPond is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with LilyPond. If not, see <http://www.gnu.org/licenses/>.
21 #include "freetype.hh"
23 #include FT_TRUETYPE_TABLES_H
25 #include "international.hh"
26 #include "memory-stream.hh"
28 #include "lily-guile.hh"
30 #include "open-type-font.hh"
33 make_index_to_charcode_map (FT_Face face)
35 Index_to_charcode_map m;
39 FT_CharMap current_cmap = face->charmap;
40 FT_Select_Charmap (face, FT_ENCODING_UNICODE);
43 for (charcode = FT_Get_First_Char (face, &gindex); gindex != 0;
44 charcode = FT_Get_Next_Char (face, charcode, &gindex))
49 FT_Set_Charmap (face, current_cmap);
55 Based on ttfps by Juliusz Chroboczek
58 print_header (void *out, FT_Face face)
60 lily_cookie_fprintf (out, "%%!PS-TrueTypeFont\n");
63 = (TT_Postscript *) FT_Get_Sfnt_Table (face, ft_sfnt_post);
66 lily_cookie_fprintf (out, "%%%%VMUsage: %d %d\n", 0, 0);
68 lily_cookie_fprintf (out, "%d dict begin\n", 11);
69 lily_cookie_fprintf (out, "/FontName /%s def\n",
70 FT_Get_Postscript_Name (face));
72 lily_cookie_fprintf (out, "/Encoding StandardEncoding def\n");
73 lily_cookie_fprintf (out, "/PaintType 0 def\n");
74 lily_cookie_fprintf (out, "/FontMatrix [1 0 0 1 0 0] def\n");
77 = (TT_Header *)FT_Get_Sfnt_Table (face, ft_sfnt_head);
79 lily_cookie_fprintf (out, "/FontBBox [%lf %lf %lf %lf] def\n",
80 float (ht->xMin) / float (ht->Units_Per_EM),
81 float (ht->yMin) / float (ht->Units_Per_EM),
82 float (ht->xMax) / float (ht->Units_Per_EM),
83 float (ht->yMax) / float (ht->Units_Per_EM));
85 lily_cookie_fprintf (out, "/FontType 42 def\n");
86 lily_cookie_fprintf (out, "/FontInfo 8 dict dup begin\n");
87 lily_cookie_fprintf (out, "/version (%.3f) def\n",
88 ht->Font_Revision / 65536.0);
93 lily_cookie_fprintf (out, "/Notice (");
94 fputpss (strings[0], out);
95 lily_cookie_fprintf (out, ") def\n");
99 lily_cookie_fprintf (out, "/FullName (");
100 fputpss (strings[4], out);
101 lily_cookie_fprintf (out, ") def\n");
105 lily_cookie_fprintf (out, "/FamilyName (");
106 fputpss (strings[1], out);
107 lily_cookie_fprintf (out, ") def\n");
111 lily_cookie_fprintf (out, "/isFixedPitch %s def\n",
112 pt->isFixedPitch ? "true" : "false");
113 lily_cookie_fprintf (out, "/UnderlinePosition %lf def\n",
114 float (pt->underlinePosition)
115 / float (ht->Units_Per_EM));
116 lily_cookie_fprintf (out, "/UnderlineThickness %lf def\n",
117 float (pt->underlineThickness)
118 / float (ht->Units_Per_EM));
119 lily_cookie_fprintf (out, "end readonly def\n");
122 #define CHUNKSIZE 65534
124 const FT_ULong FT_ENC_TAG (glyf_tag, 'g', 'l', 'y', 'f');
125 const FT_ULong FT_ENC_TAG (head_tag, 'h', 'e', 'a', 'd');
126 const FT_ULong FT_ENC_TAG (loca_tag, 'l', 'o', 'c', 'a');
129 void t42_write_table (void *out, FT_Face face, unsigned char const *buffer,
130 size_t s, bool is_glyf,
131 FT_ULong head_length, FT_ULong loca_length)
133 vector<FT_UShort> chunks;
137 /* compute chunk sizes */
138 unsigned char *head_buf = new unsigned char[head_length];
139 FT_Error error = FT_Load_Sfnt_Table (face, head_tag, 0, head_buf, NULL);
141 programming_error ("FT_Load_Sfnt_Table (): error.");
143 /* we access the lower byte of indexToLocFormat */
144 bool long_offsets = head_buf[4 * 4 + 2 * 2 + 2 * 8 + 4 * 2 + 3 * 2 + 1] == 1;
148 unsigned char *loca_buf = new unsigned char[loca_length];
149 error = FT_Load_Sfnt_Table (face, loca_tag, 0, loca_buf, NULL);
151 programming_error ("FT_Load_Sfnt_Table (): error.");
153 unsigned char *p = loca_buf;
154 unsigned char *endp = loca_buf + loca_length;
156 FT_ULong offset = 0, last_offset = 0, last_chunk = 0;
161 offset = (p[0] << 24) | (p[1] << 16) | (p[2] << 8) | p[3];
166 offset = ((p[0] << 8) | p[1]) << 1;
169 if (offset > last_offset + CHUNKSIZE)
171 if (last_chunk != last_offset)
172 chunks.push_back (FT_UShort (last_offset - last_chunk));
174 a single glyph with more than 64k data
175 is a pathological case but...
177 FT_ULong rest = offset - last_offset;
178 while (rest > CHUNKSIZE)
180 chunks.push_back (CHUNKSIZE);
183 chunks.push_back (FT_UShort (rest));
186 else if (offset > last_chunk + CHUNKSIZE)
188 chunks.push_back (FT_UShort (last_offset - last_chunk));
189 last_chunk = last_offset;
192 last_offset = offset;
194 chunks.push_back (FT_UShort (s - last_chunk));
198 else if (s > CHUNKSIZE)
201 while (rest > CHUNKSIZE)
203 chunks.push_back (CHUNKSIZE);
206 chunks.push_back (FT_UShort (rest));
209 chunks.push_back (CHUNKSIZE);
211 lily_cookie_fprintf (out, "\n"
215 static char xdigits[] = "0123456789ABCDEF";
217 int cur_chunk_idx = 0;
218 for (size_t j = 0; j < s; j++)
220 if (l >= chunks[cur_chunk_idx])
222 lily_cookie_fprintf (out, "\n"
230 lily_cookie_fprintf (out, "\n"
233 /* lily_cookie_fprintf (out,"%02X",(int)buffer[j]) is too slow */
234 lily_cookie_putc (xdigits[(buffer[j] & 0xF0) >> 4], out);
235 lily_cookie_putc (xdigits[buffer[j] & 0x0F], out);
240 /* pad to four-byte boundary */
241 while ((s++) % 4 != 0)
242 lily_cookie_fprintf (out, "00");
244 lily_cookie_fprintf (out, "\n"
250 print_body (void *out, FT_Face face)
253 FT_ULong head_length = 0, loca_length = 0;
254 FT_ULong tag, length;
255 vector<FT_ULong> lengths, tags;
258 we must build our own TTF header -- the original font
259 might be a TTC where tables are not contiguous, or the font
260 contains tables which aren't indexed at all
262 while (FT_Sfnt_Table_Info (face, idx, &tag, &length)
263 != FT_Err_Table_Missing)
265 lengths.push_back (length);
266 tags.push_back (tag);
268 head_length = length;
269 else if (tag == loca_tag)
270 loca_length = length;
274 FT_ULong hlength = 12 + 16 * idx;
276 unsigned char *hbuf = new unsigned char[hlength];
279 hbuf[0] = 0x00; /* version */
283 hbuf[4] = (unsigned char) ((idx & 0xFF00) >> 8); /* numTables */
284 hbuf[5] = idx & 0x00FF;
286 FT_UInt searchRange, entrySelector, rangeShift;
288 for (i = 1, j = 2; j <= idx; i++, j <<= 1)
290 entrySelector = i - 1;
291 searchRange = 0x10 << entrySelector;
292 rangeShift = (idx << 4) - searchRange;
294 hbuf[6] = (unsigned char) ((searchRange & 0xFF00) >> 8);
295 hbuf[7] = searchRange & 0x00FF;
296 hbuf[8] = (unsigned char) ((entrySelector & 0xFF00) >> 8);
297 hbuf[9] = entrySelector & 0x00FF;
298 hbuf[10] = (unsigned char) ((rangeShift & 0xFF00) >> 8);
299 hbuf[11] = rangeShift & 0x00FF;
303 FT_ULong checksum, font_checksum = 0;
305 FT_ULong offset = hlength; /* first table offset */
307 for (FT_UInt i = 0; i < idx; i++)
309 /* here, the buffer length must be a multiple of 4 */
310 FT_ULong len = (lengths[i] + 3) & ~3;
311 unsigned char *buf = new unsigned char[len];
313 buf[len - 1] = 0x00; /* assure padding with zeros */
317 FT_Error error = FT_Load_Sfnt_Table (face, tags[i], 0, buf, NULL);
319 programming_error ("FT_Load_Sfnt_Table (): error.");
324 first pass of computing the font checksum
325 needs checkSumAdjustment = 0
334 unsigned char *endq = buf + len;
335 for (unsigned char *q = buf; q < endq; q += 4)
336 checksum += (q[0] << 24) | (q[1] << 16) | (q[2] << 8) | q[3];
337 font_checksum += checksum;
341 *(p++) = (unsigned char) ((tags[i] & 0xFF000000UL) >> 24);
342 *(p++) = (unsigned char) ((tags[i] & 0x00FF0000UL) >> 16);
343 *(p++) = (unsigned char) ((tags[i] & 0x0000FF00UL) >> 8);
344 *(p++) = tags[i] & 0x000000FFUL;
346 *(p++) = (unsigned char) ((checksum & 0xFF000000UL) >> 24);
347 *(p++) = (unsigned char) ((checksum & 0x00FF0000UL) >> 16);
348 *(p++) = (unsigned char) ((checksum & 0x0000FF00UL) >> 8);
349 *(p++) = checksum & 0x000000FFUL;
351 *(p++) = (unsigned char) ((offset & 0xFF000000UL) >> 24);
352 *(p++) = (unsigned char) ((offset & 0x00FF0000UL) >> 16);
353 *(p++) = (unsigned char) ((offset & 0x0000FF00UL) >> 8);
354 *(p++) = offset & 0x000000FFUL;
356 *(p++) = (unsigned char) ((lengths[i] & 0xFF000000UL) >> 24);
357 *(p++) = (unsigned char) ((lengths[i] & 0x00FF0000UL) >> 16);
358 *(p++) = (unsigned char) ((lengths[i] & 0x0000FF00UL) >> 8);
359 *(p++) = lengths[i] & 0x000000FFUL;
361 /* offset must be a multiple of 4 */
362 offset += (lengths[i] + 3) & ~3;
365 /* add checksum of TTF header */
367 for (unsigned char *q = hbuf; q < p; q += 4)
368 checksum += (q[0] << 24) | (q[1] << 16) | (q[2] << 8) | q[3];
369 font_checksum += checksum;
370 font_checksum = 0xB1B0AFBAUL - font_checksum;
373 see Adobe technical note 5012.Type42_Spec.pdf for details how
374 the /sfnts array must be constructed
376 lily_cookie_fprintf (out, "/sfnts [");
377 t42_write_table (out, face, hbuf, hlength, false,
378 head_length, loca_length);
383 while (FT_Sfnt_Table_Info (face, idx, &tag, &length)
384 != FT_Err_Table_Missing)
386 unsigned char *buf = new unsigned char[length];
387 FT_Error error = FT_Load_Sfnt_Table (face, tag, 0, buf, NULL);
389 programming_error ("FT_Load_Sfnt_Table (): error.");
393 /* in the second pass simply store the computed font checksum */
394 buf[8] = (unsigned char) ((font_checksum & 0xFF000000UL) >> 24);
395 buf[9] = (unsigned char) ((font_checksum & 0x00FF0000UL) >> 16);
396 buf[10] = (unsigned char) ((font_checksum & 0x0000FF00UL) >> 8);
397 buf[11] = font_checksum & 0x000000FFUL;
400 bool is_glyf_table = tag == glyf_tag && length > CHUNKSIZE;
401 t42_write_table (out, face, buf, length, is_glyf_table,
402 head_length, loca_length);
407 lily_cookie_fprintf (out, "\n] def\n");
411 print_trailer (void *out,
414 const int GLYPH_NAME_LEN = 256;
415 char glyph_name[GLYPH_NAME_LEN];
418 = (TT_MaxProfile *)FT_Get_Sfnt_Table (face, ft_sfnt_maxp);
420 lily_cookie_fprintf (out, "/CharStrings %d dict dup begin\n", mp->numGlyphs);
422 Index_to_charcode_map ic_map (make_index_to_charcode_map (face));
424 int output_count = 0;
425 for (int i = 0; i < mp->numGlyphs; i++)
428 if (face->face_flags & FT_FACE_FLAG_GLYPH_NAMES)
430 FT_Error error = FT_Get_Glyph_Name (face, i, glyph_name,
434 programming_error ("FT_Get_Glyph_Name (): error.");
439 if (!glyph_name[0] && ic_map.find (i) != ic_map.end ())
441 FT_ULong ucode = ic_map[i];
442 get_unicode_name (glyph_name, ucode);
446 sprintf (glyph_name, ".notdef");
447 else if (glyph_name == string (".notdef"))
448 glyph_name[0] = '\0';
451 get_glyph_index_name (glyph_name, i);
455 lily_cookie_fprintf (out, "(%s) cvn %d def ", glyph_name, i);
459 programming_error (to_string ("no name for glyph %d", i));
461 if (! (output_count % 5))
462 lily_cookie_fprintf (out, "\n");
465 lily_cookie_fprintf (out, "end readonly def\n");
466 lily_cookie_fprintf (out, "FontName currentdict end definefont pop\n");
470 create_type42_font (void *out, const string &name, int idx)
474 /* check whether font index is valid */
477 face = open_ft_face (name, -1);
478 if (idx >= face->num_faces)
480 warning (_f ("font index %d too large for font `%s', using index 0",
481 idx, name.c_str ()));
487 face = open_ft_face (name, idx);
489 print_header (out, face);
490 print_body (out, face);
491 print_trailer (out, face);
496 LY_DEFINE (ly_ttf_ps_name, "ly:ttf-ps-name",
497 1, 1, 0, (SCM ttf_file_name, SCM idx),
498 "Extract the PostScript name from a TrueType font. The optional"
499 " @var{idx} argument is useful for TrueType collections (TTC)"
500 " only; it specifies the font index within the TTC. The default"
501 " value of @var{idx} is@tie{}0.")
503 LY_ASSERT_TYPE (scm_is_string, ttf_file_name, 1);
506 if (!SCM_UNBNDP (idx))
508 LY_ASSERT_TYPE (scm_is_integer, idx, 2);
509 i = scm_to_int (idx);
512 warning (_ ("font index must be non-negative, using index 0"));
517 string file_name = ly_scm2string (ttf_file_name);
518 debug_output ("\n[" + file_name, false);
522 /* check whether font index is valid */
525 face = open_ft_face (file_name, -1);
526 if (i >= face->num_faces)
528 warning (_f ("font index %d too large for font `%s', using index 0",
529 i, file_name.c_str ()));
535 face = open_ft_face (file_name, i);
536 char const *ps_name_str0 = FT_Get_Postscript_Name (face);
537 SCM ps_name = scm_from_locale_string (ps_name_str0 ? ps_name_str0 : "");
540 debug_output ("]", false);
545 LY_DEFINE (ly_ttf_2_pfa, "ly:ttf->pfa",
546 1, 1, 0, (SCM ttf_file_name, SCM idx),
547 "Convert the contents of a TrueType font file to PostScript"
548 " Type@tie{}42 font, returning it as a string. The optional"
549 " @var{idx} argument is useful for TrueType collections (TTC)"
550 " only; it specifies the font index within the TTC. The default"
551 " value of @var{idx} is@tie{}0.")
553 LY_ASSERT_TYPE (scm_is_string, ttf_file_name, 1);
556 if (!SCM_UNBNDP (idx))
558 LY_ASSERT_TYPE (scm_is_integer, idx, 2);
559 i = scm_to_int (idx);
562 warning (_ ("font index must be non-negative, using index 0"));
567 string file_name = ly_scm2string (ttf_file_name);
568 debug_output ("[" + file_name); // Debug message should start on a new line
570 Memory_out_stream stream;
572 create_type42_font (&stream, file_name, i);
573 SCM asscm = scm_from_latin1_stringn (stream.get_string (),
574 stream.get_length ());
576 debug_output ("]", false);