2 This file is part of LilyPond, the GNU music typesetter.
4 Copyright (C) 2005--2010 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 <freetype/tttables.h>
25 #include "international.hh"
26 #include "memory-stream.hh"
28 #include "lily-guile.hh"
30 #include "open-type-font.hh"
34 make_index_to_charcode_map (FT_Face face)
36 Index_to_charcode_map m;
40 FT_CharMap current_cmap = face->charmap;
41 FT_Select_Charmap (face, FT_ENCODING_UNICODE);
44 for (charcode = FT_Get_First_Char (face, &gindex); gindex != 0;
45 charcode = FT_Get_Next_Char (face, charcode, &gindex))
50 FT_Set_Charmap (face, current_cmap);
56 Based on ttfps by Juliusz Chroboczek
59 print_header (void *out, FT_Face face)
61 lily_cookie_fprintf (out, "%%!PS-TrueTypeFont\n");
64 = (TT_Postscript *) FT_Get_Sfnt_Table (face, ft_sfnt_post);
67 lily_cookie_fprintf (out, "%%%%VMUsage: %d %d\n", 0, 0);
69 lily_cookie_fprintf (out, "%d dict begin\n", 11);
70 lily_cookie_fprintf (out, "/FontName /%s def\n",
71 FT_Get_Postscript_Name (face));
73 lily_cookie_fprintf (out, "/Encoding StandardEncoding def\n");
74 lily_cookie_fprintf (out, "/PaintType 0 def\n");
75 lily_cookie_fprintf (out, "/FontMatrix [1 0 0 1 0 0] def\n");
78 = (TT_Header *)FT_Get_Sfnt_Table (face, ft_sfnt_head);
80 lily_cookie_fprintf (out, "/FontBBox [%lf %lf %lf %lf] def\n",
81 float (ht->xMin) / ht->Units_Per_EM,
82 float (ht->yMin) / ht->Units_Per_EM,
83 float (ht->xMax) / ht->Units_Per_EM,
84 float (ht->yMax) / ht->Units_Per_EM);
86 lily_cookie_fprintf (out, "/FontType 42 def\n");
87 lily_cookie_fprintf (out, "/FontInfo 8 dict dup begin\n");
88 lily_cookie_fprintf (out, "/version (%.3f) def\n",
89 ht->Font_Revision / 65536.0);
94 lily_cookie_fprintf (out, "/Notice (");
95 fputpss (strings[0], out);
96 lily_cookie_fprintf (out, ") def\n");
100 lily_cookie_fprintf (out, "/FullName (");
101 fputpss (strings[4], out);
102 lily_cookie_fprintf (out, ") def\n");
106 lily_cookie_fprintf (out, "/FamilyName (");
107 fputpss (strings[1], out);
108 lily_cookie_fprintf (out, ") def\n");
112 lily_cookie_fprintf (out, "/isFixedPitch %s def\n",
113 pt->isFixedPitch ? "true" : "false");
114 lily_cookie_fprintf (out, "/UnderlinePosition %lf def\n",
115 float (pt->underlinePosition) / ht->Units_Per_EM);
116 lily_cookie_fprintf (out, "/UnderlineThickness %lf def\n",
117 float (pt->underlineThickness) / ht->Units_Per_EM);
118 lily_cookie_fprintf (out, "end readonly def\n");
121 #define CHUNKSIZE 65534
123 const FT_ULong FT_ENC_TAG (glyf_tag, 'g', 'l', 'y', 'f');
124 const FT_ULong FT_ENC_TAG (head_tag, 'h', 'e', 'a', 'd');
125 const FT_ULong FT_ENC_TAG (loca_tag, 'l', 'o', 'c', 'a');
128 void t42_write_table (void *out, FT_Face face, unsigned char const *buffer,
129 size_t s, bool is_glyf,
130 FT_ULong head_length, FT_ULong loca_length)
132 vector<FT_UShort> chunks;
136 /* compute chunk sizes */
137 unsigned char *head_buf = new unsigned char[head_length];
138 FT_Error error = FT_Load_Sfnt_Table (face, head_tag, 0, head_buf, NULL);
140 programming_error ("FT_Load_Sfnt_Table (): error.");
142 /* we access the lower byte of indexToLocFormat */
143 bool long_offsets = head_buf[4*4 + 2*2 + 2*8 + 4*2 + 3*2 + 1] == 1;
147 unsigned char *loca_buf = new unsigned char[loca_length];
148 error = FT_Load_Sfnt_Table (face, loca_tag, 0, loca_buf, NULL);
150 programming_error ("FT_Load_Sfnt_Table (): error.");
152 unsigned char *p = loca_buf;
153 unsigned char *endp = loca_buf + loca_length;
155 FT_ULong offset = 0, last_offset = 0, last_chunk = 0;
160 offset = (p[0] << 24) | (p[1] << 16) | (p[2] << 8) | p[3];
165 offset = ((p[0] << 8) | p[1]) << 1;
168 if (offset > last_offset + CHUNKSIZE)
170 if (last_chunk != last_offset)
171 chunks.push_back (last_offset - last_chunk);
173 a single glyph with more than 64k data
174 is a pathological case but...
176 FT_ULong rest = offset - last_offset;
177 while (rest > CHUNKSIZE)
179 chunks.push_back (CHUNKSIZE);
182 chunks.push_back (rest);
185 else if (offset > last_chunk + CHUNKSIZE)
187 chunks.push_back (last_offset - last_chunk);
188 last_chunk = last_offset;
191 last_offset = offset;
193 chunks.push_back (s - last_chunk);
197 else if (s > CHUNKSIZE)
200 while (rest > CHUNKSIZE)
202 chunks.push_back (CHUNKSIZE);
205 chunks.push_back (rest);
208 chunks.push_back (CHUNKSIZE);
210 lily_cookie_fprintf (out, "\n"
214 static char xdigits[] = "0123456789ABCDEF";
216 int cur_chunk_idx = 0;
217 for (size_t j = 0; j < s; j++)
219 if (l >= chunks[cur_chunk_idx])
221 lily_cookie_fprintf (out, "\n"
229 lily_cookie_fprintf (out, "\n"
232 /* lily_cookie_fprintf (out,"%02X",(int)buffer[j]) is too slow */
233 lily_cookie_putc (xdigits[(buffer[j] & 0xF0) >> 4], out);
234 lily_cookie_putc (xdigits[buffer[j] & 0x0F], out);
239 /* pad to four-byte boundary */
240 while ((s ++) % 4 != 0)
241 lily_cookie_fprintf (out, "00");
243 lily_cookie_fprintf (out, "\n"
249 print_body (void *out, FT_Face face)
252 FT_ULong head_length = 0, loca_length = 0;
253 FT_ULong tag, length;
254 vector<FT_ULong> lengths, tags;
257 we must build our own TTF header -- the original font
258 might be a TTC where tables are not contiguous, or the font
259 contains tables which aren't indexed at all
261 while (FT_Sfnt_Table_Info (face, idx, &tag, &length)
262 != FT_Err_Table_Missing)
264 lengths.push_back (length);
265 tags.push_back (tag);
267 head_length = length;
268 else if (tag == loca_tag)
269 loca_length = length;
273 FT_ULong hlength = 12 + 16 * idx;
275 unsigned char *hbuf = new unsigned char[hlength];
278 hbuf[0] = 0x00; /* version */
282 hbuf[4] = (idx & 0xFF00) >> 8; /* numTables */
283 hbuf[5] = idx & 0x00FF;
285 FT_UInt searchRange, entrySelector, rangeShift;
287 for (i = 1, j = 2; j <= idx; i++, j <<= 1)
289 entrySelector = i - 1;
290 searchRange = 0x10 << entrySelector;
291 rangeShift = (idx << 4) - searchRange;
293 hbuf[6] = (searchRange & 0xFF00) >> 8;
294 hbuf[7] = searchRange & 0x00FF;
295 hbuf[8] = (entrySelector & 0xFF00) >> 8;
296 hbuf[9] = entrySelector & 0x00FF;
297 hbuf[10] = (rangeShift & 0xFF00) >> 8;
298 hbuf[11] = rangeShift & 0x00FF;
302 FT_ULong checksum, font_checksum = 0;
304 FT_ULong offset = hlength; /* first table offset */
306 for (FT_UInt i = 0; i < idx; i++)
308 /* here, the buffer length must be a multiple of 4 */
309 FT_ULong len = (lengths[i] + 3) & ~3;
310 unsigned char *buf = new unsigned char[len];
312 buf[len - 1] = 0x00; /* assure padding with zeros */
316 FT_Error error = FT_Load_Sfnt_Table (face, tags[i], 0, buf, NULL);
318 programming_error ("FT_Load_Sfnt_Table (): error.");
323 first pass of computing the font checksum
324 needs checkSumAdjustment = 0
333 unsigned char *endq = buf + len;
334 for (unsigned char *q = buf; q < endq; q += 4)
335 checksum += (q[0] << 24) | (q[1] << 16) | (q[2] << 8) | q[3];
336 font_checksum += checksum;
340 *(p++) = (tags[i] & 0xFF000000UL) >> 24;
341 *(p++) = (tags[i] & 0x00FF0000UL) >> 16;
342 *(p++) = (tags[i] & 0x0000FF00UL) >> 8;
343 *(p++) = tags[i] & 0x000000FFUL;
345 *(p++) = (checksum & 0xFF000000UL) >> 24;
346 *(p++) = (checksum & 0x00FF0000UL) >> 16;
347 *(p++) = (checksum & 0x0000FF00UL) >> 8;
348 *(p++) = checksum & 0x000000FFUL;
350 *(p++) = (offset & 0xFF000000UL) >> 24;
351 *(p++) = (offset & 0x00FF0000UL) >> 16;
352 *(p++) = (offset & 0x0000FF00UL) >> 8;
353 *(p++) = offset & 0x000000FFUL;
355 *(p++) = (lengths[i] & 0xFF000000UL) >> 24;
356 *(p++) = (lengths[i] & 0x00FF0000UL) >> 16;
357 *(p++) = (lengths[i] & 0x0000FF00UL) >> 8;
358 *(p++) = lengths[i] & 0x000000FFUL;
360 /* offset must be a multiple of 4 */
361 offset += (lengths[i] + 3) & ~3;
364 /* add checksum of TTF header */
366 for (unsigned char *q = hbuf; q < p; q += 4)
367 checksum += (q[0] << 24) | (q[1] << 16) | (q[2] << 8) | q[3];
368 font_checksum += checksum;
369 font_checksum = 0xB1B0AFBAUL - font_checksum;
372 see Adobe technical note 5012.Type42_Spec.pdf for details how
373 the /sfnts array must be constructed
375 lily_cookie_fprintf (out, "/sfnts [");
376 t42_write_table (out, face, hbuf, hlength, false,
377 head_length, loca_length);
382 while (FT_Sfnt_Table_Info (face, idx, &tag, &length)
383 != FT_Err_Table_Missing)
385 unsigned char *buf = new unsigned char[length];
386 FT_Error error = FT_Load_Sfnt_Table (face, tag, 0, buf, NULL);
388 programming_error ("FT_Load_Sfnt_Table (): error.");
392 /* in the second pass simply store the computed font checksum */
393 buf[8] = (font_checksum & 0xFF000000UL) >> 24;
394 buf[9] = (font_checksum & 0x00FF0000UL) >> 16;
395 buf[10] = (font_checksum & 0x0000FF00UL) >> 8;
396 buf[11] = font_checksum & 0x000000FFUL;
399 bool is_glyf_table = tag == glyf_tag && length > CHUNKSIZE;
400 t42_write_table (out, face, buf, length, is_glyf_table,
401 head_length, loca_length);
406 lily_cookie_fprintf (out, "\n] def\n");
410 print_trailer (void *out,
413 const int GLYPH_NAME_LEN = 256;
414 char glyph_name[GLYPH_NAME_LEN];
417 = (TT_MaxProfile *)FT_Get_Sfnt_Table (face, ft_sfnt_maxp);
419 lily_cookie_fprintf (out, "/CharStrings %d dict dup begin\n", mp->numGlyphs);
421 Index_to_charcode_map ic_map (make_index_to_charcode_map (face));
423 int output_count = 0;
424 for (int i = 0; i < mp->numGlyphs; i++)
427 if (face->face_flags & FT_FACE_FLAG_GLYPH_NAMES)
429 FT_Error error = FT_Get_Glyph_Name (face, i, glyph_name,
433 programming_error ("FT_Get_Glyph_Name (): error.");
438 if (!glyph_name[0] && ic_map.find (i) != ic_map.end ())
440 FT_ULong ucode = ic_map[i];
441 get_unicode_name (glyph_name, ucode);
445 sprintf (glyph_name, ".notdef");
446 else if (glyph_name == string (".notdef"))
447 glyph_name[0] = '\0';
450 get_glyph_index_name (glyph_name, i);
454 lily_cookie_fprintf (out, "/%s %d def ", glyph_name, i);
458 programming_error (to_string ("no name for glyph %d", i));
460 if (! (output_count % 5))
461 lily_cookie_fprintf (out, "\n");
464 lily_cookie_fprintf (out, "end readonly def\n");
465 lily_cookie_fprintf (out, "FontName currentdict end definefont pop\n");
469 create_type42_font (void *out, string name, int idx)
473 /* check whether font index is valid */
476 face = open_ft_face (name, -1);
477 if (idx >= face->num_faces)
479 warning (_f ("font index %d too large for font `%s', using index 0",
486 face = open_ft_face (name, idx);
488 print_header (out, face);
489 print_body (out, face);
490 print_trailer (out, face);
495 LY_DEFINE (ly_ttf_ps_name, "ly:ttf-ps-name",
496 1, 1, 0, (SCM ttf_file_name, SCM idx),
497 "Extract the PostScript name from a TrueType font. The optional"
498 " @var{idx} argument is useful for TrueType collections (TTC)"
499 " only; it specifies the font index within the TTC. The default"
500 " value of @var{idx} is@tie{}0.")
502 LY_ASSERT_TYPE (scm_is_string, ttf_file_name, 1);
505 if (idx != SCM_UNDEFINED)
507 LY_ASSERT_TYPE (scm_is_integer, idx, 2);
508 i = scm_to_int (idx);
511 warning (_ ("font index must be non-negative, using index 0"));
516 string file_name = ly_scm2string (ttf_file_name);
517 if (be_verbose_global)
518 progress_indication ("\n[" + file_name);
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 if (be_verbose_global)
541 progress_indication ("]");
546 LY_DEFINE (ly_ttf_2_pfa, "ly:ttf->pfa",
547 1, 1, 0, (SCM ttf_file_name, SCM idx),
548 "Convert the contents of a TrueType font file to PostScript"
549 " Type@tie{}42 font, returning it as a string. The optional"
550 " @var{idx} argument is useful for TrueType collections (TTC)"
551 " only; it specifies the font index within the TTC. The default"
552 " value of @var{idx} is@tie{}0.")
554 LY_ASSERT_TYPE (scm_is_string, ttf_file_name, 1);
557 if (idx != SCM_UNDEFINED)
559 LY_ASSERT_TYPE (scm_is_integer, idx, 2);
560 i = scm_to_int (idx);
563 warning (_ ("font index must be non-negative, using index 0"));
568 string file_name = ly_scm2string (ttf_file_name);
569 if (be_verbose_global)
570 progress_indication ("\n[" + file_name);
572 Memory_out_stream stream;
574 create_type42_font (&stream, file_name, i);
575 SCM asscm = scm_from_locale_stringn (stream.get_string (),
576 stream.get_length ());
578 if (be_verbose_global)
579 progress_indication ("]");