1 /* 2 * Copyright 2011,2012 Google, Inc. 3 * 4 * This is part of HarfBuzz, a text shaping library. 5 * 6 * Permission is hereby granted, without written agreement and without 7 * license or royalty fees, to use, copy, modify, and distribute this 8 * software and its documentation for any purpose, provided that the 9 * above copyright notice and the following two paragraphs appear in 10 * all copies of this software. 11 * 12 * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR 13 * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES 14 * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN 15 * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH 16 * DAMAGE. 17 * 18 * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING, 19 * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND 20 * FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS 21 * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO 22 * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS. 23 * 24 * Google Author(s): Behdad Esfahbod 25 */ 26 27 #include "options.hh" 28 29 #ifdef HAVE_FREETYPE 30 #include <hb-ft.h> 31 #endif 32 #ifdef HAVE_OT 33 #include <hb-ot.h> 34 #endif 35 36 struct supported_font_funcs_t { 37 char name[4]; 38 void (*func) (hb_font_t *); 39 } supported_font_funcs[] = 40 { 41 #ifdef HAVE_FREETYPE 42 {"ft", hb_ft_font_set_funcs}, 43 #endif 44 #ifdef HAVE_OT 45 {"ot", hb_ot_font_set_funcs}, 46 #endif 47 }; 48 49 50 void 51 fail (hb_bool_t suggest_help, const char *format, ...) 52 { 53 const char *msg; 54 55 va_list vap; 56 va_start (vap, format); 57 msg = g_strdup_vprintf (format, vap); 58 va_end (vap); 59 const char *prgname = g_get_prgname (); 60 g_printerr ("%s: %s\n", prgname, msg); 61 if (suggest_help) 62 g_printerr ("Try `%s --help' for more information.\n", prgname); 63 64 exit (1); 65 } 66 67 68 hb_bool_t debug = false; 69 70 static gchar * 71 shapers_to_string (void) 72 { 73 GString *shapers = g_string_new (NULL); 74 const char **shaper_list = hb_shape_list_shapers (); 75 76 for (; *shaper_list; shaper_list++) { 77 g_string_append (shapers, *shaper_list); 78 g_string_append_c (shapers, ','); 79 } 80 g_string_truncate (shapers, MAX (0, (gint)shapers->len - 1)); 81 82 return g_string_free (shapers, false); 83 } 84 85 static G_GNUC_NORETURN gboolean 86 show_version (const char *name G_GNUC_UNUSED, 87 const char *arg G_GNUC_UNUSED, 88 gpointer data G_GNUC_UNUSED, 89 GError **error G_GNUC_UNUSED) 90 { 91 g_printf ("%s (%s) %s\n", g_get_prgname (), PACKAGE_NAME, PACKAGE_VERSION); 92 93 char *shapers = shapers_to_string (); 94 g_printf ("Available shapers: %s\n", shapers); 95 g_free (shapers); 96 if (strcmp (HB_VERSION_STRING, hb_version_string ())) 97 g_printf ("Linked HarfBuzz library has a different version: %s\n", hb_version_string ()); 98 99 exit(0); 100 } 101 102 103 void 104 option_parser_t::add_main_options (void) 105 { 106 GOptionEntry entries[] = 107 { 108 {"version", 0, G_OPTION_FLAG_NO_ARG, 109 G_OPTION_ARG_CALLBACK, (gpointer) &show_version, "Show version numbers", NULL}, 110 {"debug", 0, 0, G_OPTION_ARG_NONE, &debug, "Free all resources before exit", NULL}, 111 {NULL} 112 }; 113 g_option_context_add_main_entries (context, entries, NULL); 114 } 115 116 static gboolean 117 pre_parse (GOptionContext *context G_GNUC_UNUSED, 118 GOptionGroup *group G_GNUC_UNUSED, 119 gpointer data, 120 GError **error) 121 { 122 option_group_t *option_group = (option_group_t *) data; 123 option_group->pre_parse (error); 124 return *error == NULL; 125 } 126 127 static gboolean 128 post_parse (GOptionContext *context G_GNUC_UNUSED, 129 GOptionGroup *group G_GNUC_UNUSED, 130 gpointer data, 131 GError **error) 132 { 133 option_group_t *option_group = static_cast<option_group_t *>(data); 134 option_group->post_parse (error); 135 return *error == NULL; 136 } 137 138 void 139 option_parser_t::add_group (GOptionEntry *entries, 140 const gchar *name, 141 const gchar *description, 142 const gchar *help_description, 143 option_group_t *option_group) 144 { 145 GOptionGroup *group = g_option_group_new (name, description, help_description, 146 static_cast<gpointer>(option_group), NULL); 147 g_option_group_add_entries (group, entries); 148 g_option_group_set_parse_hooks (group, pre_parse, post_parse); 149 g_option_context_add_group (context, group); 150 } 151 152 void 153 option_parser_t::parse (int *argc, char ***argv) 154 { 155 setlocale (LC_ALL, ""); 156 157 GError *parse_error = NULL; 158 if (!g_option_context_parse (context, argc, argv, &parse_error)) 159 { 160 if (parse_error != NULL) { 161 fail (true, "%s", parse_error->message); 162 //g_error_free (parse_error); 163 } else 164 fail (true, "Option parse error"); 165 } 166 } 167 168 169 static gboolean 170 parse_margin (const char *name G_GNUC_UNUSED, 171 const char *arg, 172 gpointer data, 173 GError **error G_GNUC_UNUSED) 174 { 175 view_options_t *view_opts = (view_options_t *) data; 176 view_options_t::margin_t &m = view_opts->margin; 177 switch (sscanf (arg, "%lf%*[ ,]%lf%*[ ,]%lf%*[ ,]%lf", &m.t, &m.r, &m.b, &m.l)) { 178 case 1: m.r = m.t; 179 case 2: m.b = m.t; 180 case 3: m.l = m.r; 181 case 4: return true; 182 default: 183 g_set_error (error, G_OPTION_ERROR, G_OPTION_ERROR_BAD_VALUE, 184 "%s argument should be one to four space-separated numbers", 185 name); 186 return false; 187 } 188 } 189 190 191 static gboolean 192 parse_shapers (const char *name G_GNUC_UNUSED, 193 const char *arg, 194 gpointer data, 195 GError **error G_GNUC_UNUSED) 196 { 197 shape_options_t *shape_opts = (shape_options_t *) data; 198 g_strfreev (shape_opts->shapers); 199 shape_opts->shapers = g_strsplit (arg, ",", 0); 200 return true; 201 } 202 203 static G_GNUC_NORETURN gboolean 204 list_shapers (const char *name G_GNUC_UNUSED, 205 const char *arg G_GNUC_UNUSED, 206 gpointer data G_GNUC_UNUSED, 207 GError **error G_GNUC_UNUSED) 208 { 209 for (const char **shaper = hb_shape_list_shapers (); *shaper; shaper++) 210 g_printf ("%s\n", *shaper); 211 212 exit(0); 213 } 214 215 216 static gboolean 217 parse_features (const char *name G_GNUC_UNUSED, 218 const char *arg, 219 gpointer data, 220 GError **error G_GNUC_UNUSED) 221 { 222 shape_options_t *shape_opts = (shape_options_t *) data; 223 char *s = (char *) arg; 224 char *p; 225 226 shape_opts->num_features = 0; 227 g_free (shape_opts->features); 228 shape_opts->features = NULL; 229 230 if (!*s) 231 return true; 232 233 /* count the features first, so we can allocate memory */ 234 p = s; 235 do { 236 shape_opts->num_features++; 237 p = strchr (p, ','); 238 if (p) 239 p++; 240 } while (p); 241 242 shape_opts->features = (hb_feature_t *) calloc (shape_opts->num_features, sizeof (*shape_opts->features)); 243 244 /* now do the actual parsing */ 245 p = s; 246 shape_opts->num_features = 0; 247 while (p && *p) { 248 char *end = strchr (p, ','); 249 if (hb_feature_from_string (p, end ? end - p : -1, &shape_opts->features[shape_opts->num_features])) 250 shape_opts->num_features++; 251 p = end ? end + 1 : NULL; 252 } 253 254 return true; 255 } 256 257 static gboolean 258 parse_variations (const char *name G_GNUC_UNUSED, 259 const char *arg, 260 gpointer data, 261 GError **error G_GNUC_UNUSED) 262 { 263 font_options_t *font_opts = (font_options_t *) data; 264 char *s = (char *) arg; 265 char *p; 266 267 font_opts->num_variations = 0; 268 g_free (font_opts->variations); 269 font_opts->variations = NULL; 270 271 if (!*s) 272 return true; 273 274 /* count the variations first, so we can allocate memory */ 275 p = s; 276 do { 277 font_opts->num_variations++; 278 p = strchr (p, ','); 279 if (p) 280 p++; 281 } while (p); 282 283 font_opts->variations = (hb_variation_t *) calloc (font_opts->num_variations, sizeof (*font_opts->variations)); 284 285 /* now do the actual parsing */ 286 p = s; 287 font_opts->num_variations = 0; 288 while (p && *p) { 289 char *end = strchr (p, ','); 290 if (hb_variation_from_string (p, end ? end - p : -1, &font_opts->variations[font_opts->num_variations])) 291 font_opts->num_variations++; 292 p = end ? end + 1 : NULL; 293 } 294 295 return true; 296 } 297 298 299 void 300 view_options_t::add_options (option_parser_t *parser) 301 { 302 GOptionEntry entries[] = 303 { 304 {"annotate", 0, 0, G_OPTION_ARG_NONE, &this->annotate, "Annotate output rendering", NULL}, 305 {"background", 0, 0, G_OPTION_ARG_STRING, &this->back, "Set background color (default: " DEFAULT_BACK ")", "rrggbb/rrggbbaa"}, 306 {"foreground", 0, 0, G_OPTION_ARG_STRING, &this->fore, "Set foreground color (default: " DEFAULT_FORE ")", "rrggbb/rrggbbaa"}, 307 {"line-space", 0, 0, G_OPTION_ARG_DOUBLE, &this->line_space, "Set space between lines (default: 0)", "units"}, 308 {"margin", 0, 0, G_OPTION_ARG_CALLBACK, (gpointer) &parse_margin, "Margin around output (default: " G_STRINGIFY(DEFAULT_MARGIN) ")","one to four numbers"}, 309 {NULL} 310 }; 311 parser->add_group (entries, 312 "view", 313 "View options:", 314 "Options for output rendering", 315 this); 316 } 317 318 void 319 shape_options_t::add_options (option_parser_t *parser) 320 { 321 GOptionEntry entries[] = 322 { 323 {"list-shapers", 0, G_OPTION_FLAG_NO_ARG, 324 G_OPTION_ARG_CALLBACK, (gpointer) &list_shapers, "List available shapers and quit", NULL}, 325 {"shaper", 0, G_OPTION_FLAG_HIDDEN, 326 G_OPTION_ARG_CALLBACK, (gpointer) &parse_shapers, "Hidden duplicate of --shapers", NULL}, 327 {"shapers", 0, 0, G_OPTION_ARG_CALLBACK, (gpointer) &parse_shapers, "Set comma-separated list of shapers to try","list"}, 328 {"direction", 0, 0, G_OPTION_ARG_STRING, &this->direction, "Set text direction (default: auto)", "ltr/rtl/ttb/btt"}, 329 {"language", 0, 0, G_OPTION_ARG_STRING, &this->language, "Set text language (default: $LANG)", "langstr"}, 330 {"script", 0, 0, G_OPTION_ARG_STRING, &this->script, "Set text script (default: auto)", "ISO-15924 tag"}, 331 {"bot", 0, 0, G_OPTION_ARG_NONE, &this->bot, "Treat text as beginning-of-paragraph", NULL}, 332 {"eot", 0, 0, G_OPTION_ARG_NONE, &this->eot, "Treat text as end-of-paragraph", NULL}, 333 {"preserve-default-ignorables",0, 0, G_OPTION_ARG_NONE, &this->preserve_default_ignorables, "Preserve Default-Ignorable characters", NULL}, 334 {"utf8-clusters", 0, 0, G_OPTION_ARG_NONE, &this->utf8_clusters, "Use UTF8 byte indices, not char indices", NULL}, 335 {"cluster-level", 0, 0, G_OPTION_ARG_INT, &this->cluster_level, "Cluster merging level (default: 0)", "0/1/2"}, 336 {"normalize-glyphs",0, 0, G_OPTION_ARG_NONE, &this->normalize_glyphs, "Rearrange glyph clusters in nominal order", NULL}, 337 {"num-iterations", 0, 0, G_OPTION_ARG_INT, &this->num_iterations, "Run shaper N times (default: 1)", "N"}, 338 {NULL} 339 }; 340 parser->add_group (entries, 341 "shape", 342 "Shape options:", 343 "Options for the shaping process", 344 this); 345 346 const gchar *features_help = "Comma-separated list of font features\n" 347 "\n" 348 " Features can be enabled or disabled, either globally or limited to\n" 349 " specific character ranges. The format for specifying feature settings\n" 350 " follows. All valid CSS font-feature-settings values other than 'normal'\n" 351 " and 'inherited' are also accepted, though, not documented below.\n" 352 "\n" 353 " The range indices refer to the positions between Unicode characters,\n" 354 " unless the --utf8-clusters is provided, in which case range indices\n" 355 " refer to UTF-8 byte indices. The position before the first character\n" 356 " is always 0.\n" 357 "\n" 358 " The format is Python-esque. Here is how it all works:\n" 359 "\n" 360 " Syntax: Value: Start: End:\n" 361 "\n" 362 " Setting value:\n" 363 " \"kern\" 1 0 # Turn feature on\n" 364 " \"+kern\" 1 0 # Turn feature on\n" 365 " \"-kern\" 0 0 # Turn feature off\n" 366 " \"kern=0\" 0 0 # Turn feature off\n" 367 " \"kern=1\" 1 0 # Turn feature on\n" 368 " \"aalt=2\" 2 0 # Choose 2nd alternate\n" 369 "\n" 370 " Setting index:\n" 371 " \"kern[]\" 1 0 # Turn feature on\n" 372 " \"kern[:]\" 1 0 # Turn feature on\n" 373 " \"kern[5:]\" 1 5 # Turn feature on, partial\n" 374 " \"kern[:5]\" 1 0 5 # Turn feature on, partial\n" 375 " \"kern[3:5]\" 1 3 5 # Turn feature on, range\n" 376 " \"kern[3]\" 1 3 3+1 # Turn feature on, single char\n" 377 "\n" 378 " Mixing it all:\n" 379 "\n" 380 " \"aalt[3:5]=2\" 2 3 5 # Turn 2nd alternate on for range"; 381 382 GOptionEntry entries2[] = 383 { 384 {"features", 0, 0, G_OPTION_ARG_CALLBACK, (gpointer) &parse_features, features_help, "list"}, 385 {NULL} 386 }; 387 parser->add_group (entries2, 388 "features", 389 "Features options:", 390 "Options for font features used", 391 this); 392 } 393 394 static gboolean 395 parse_font_size (const char *name G_GNUC_UNUSED, 396 const char *arg, 397 gpointer data, 398 GError **error G_GNUC_UNUSED) 399 { 400 font_options_t *font_opts = (font_options_t *) data; 401 if (0 == strcmp (arg, "upem")) 402 { 403 font_opts->font_size_y = font_opts->font_size_x = FONT_SIZE_UPEM; 404 return true; 405 } 406 switch (sscanf (arg, "%lf%*[ ,]%lf", &font_opts->font_size_x, &font_opts->font_size_y)) { 407 case 1: font_opts->font_size_y = font_opts->font_size_x; 408 case 2: return true; 409 default: 410 g_set_error (error, G_OPTION_ERROR, G_OPTION_ERROR_BAD_VALUE, 411 "%s argument should be one to four space-separated numbers", 412 name); 413 return false; 414 } 415 } 416 void 417 font_options_t::add_options (option_parser_t *parser) 418 { 419 char *text = NULL; 420 421 { 422 ASSERT_STATIC (ARRAY_LENGTH_CONST (supported_font_funcs) > 0); 423 GString *s = g_string_new (NULL); 424 g_string_printf (s, "Set font functions implementation to use (default: %s)\n\n Supported font function implementations are: %s", 425 supported_font_funcs[0].name, 426 supported_font_funcs[0].name); 427 for (unsigned int i = 1; i < ARRAY_LENGTH (supported_font_funcs); i++) 428 { 429 g_string_append_c (s, '/'); 430 g_string_append (s, supported_font_funcs[i].name); 431 } 432 text = g_string_free (s, FALSE); 433 parser->free_later (text); 434 } 435 436 char *font_size_text; 437 if (default_font_size == FONT_SIZE_UPEM) 438 font_size_text = (char *) "Font size (default: upem)"; 439 else 440 { 441 font_size_text = g_strdup_printf ("Font size (default: %d)", default_font_size); 442 parser->free_later (font_size_text); 443 } 444 445 GOptionEntry entries[] = 446 { 447 {"font-file", 0, 0, G_OPTION_ARG_STRING, &this->font_file, "Set font file-name", "filename"}, 448 {"face-index", 0, 0, G_OPTION_ARG_INT, &this->face_index, "Set face index (default: 0)", "index"}, 449 {"font-size", 0, default_font_size ? 0 : G_OPTION_FLAG_HIDDEN, 450 G_OPTION_ARG_CALLBACK, (gpointer) &parse_font_size, font_size_text, "1/2 numbers or 'upem'"}, 451 {"font-funcs", 0, 0, G_OPTION_ARG_STRING, &this->font_funcs, text, "impl"}, 452 {NULL} 453 }; 454 parser->add_group (entries, 455 "font", 456 "Font options:", 457 "Options for the font", 458 this); 459 460 const gchar *variations_help = "Comma-separated list of font variations\n" 461 "\n" 462 " Variations are set globally. The format for specifying variation settings\n" 463 " follows. All valid CSS font-variation-settings values other than 'normal'\n" 464 " and 'inherited' are also accepted, though, not documented below.\n" 465 "\n" 466 " The format is a tag, optionally followed by an equals sign, followed by a\n" 467 " number. For example:\n" 468 "\n" 469 " \"wght=500\"\n" 470 " \"slnt=-7.5\"\n"; 471 472 GOptionEntry entries2[] = 473 { 474 {"variations", 0, 0, G_OPTION_ARG_CALLBACK, (gpointer) &parse_variations, variations_help, "list"}, 475 {NULL} 476 }; 477 parser->add_group (entries2, 478 "variations", 479 "Varitions options:", 480 "Options for font variations used", 481 this); 482 } 483 484 void 485 text_options_t::add_options (option_parser_t *parser) 486 { 487 GOptionEntry entries[] = 488 { 489 {"text", 0, 0, G_OPTION_ARG_STRING, &this->text, "Set input text", "string"}, 490 {"text-file", 0, 0, G_OPTION_ARG_STRING, &this->text_file, "Set input text file-name\n\n If no text is provided, standard input is used for input.\n", "filename"}, 491 {"text-before", 0, 0, G_OPTION_ARG_STRING, &this->text_before, "Set text context before each line", "string"}, 492 {"text-after", 0, 0, G_OPTION_ARG_STRING, &this->text_after, "Set text context after each line", "string"}, 493 {NULL} 494 }; 495 parser->add_group (entries, 496 "text", 497 "Text options:", 498 "Options for the input text", 499 this); 500 } 501 502 void 503 output_options_t::add_options (option_parser_t *parser) 504 { 505 const char *text; 506 507 if (NULL == supported_formats) 508 text = "Set output serialization format"; 509 else 510 { 511 char *items = g_strjoinv ("/", const_cast<char **> (supported_formats)); 512 text = g_strdup_printf ("Set output format\n\n Supported output formats are: %s", items); 513 g_free (items); 514 parser->free_later ((char *) text); 515 } 516 517 GOptionEntry entries[] = 518 { 519 {"output-file", 0, 0, G_OPTION_ARG_STRING, &this->output_file, "Set output file-name (default: stdout)","filename"}, 520 {"output-format", 0, 0, G_OPTION_ARG_STRING, &this->output_format, text, "format"}, 521 {NULL} 522 }; 523 parser->add_group (entries, 524 "output", 525 "Output destination & format options:", 526 "Options for the destination & form of the output", 527 this); 528 } 529 530 531 532 hb_font_t * 533 font_options_t::get_font (void) const 534 { 535 if (font) 536 return font; 537 538 hb_blob_t *blob = NULL; 539 540 /* Create the blob */ 541 { 542 char *font_data; 543 unsigned int len = 0; 544 hb_destroy_func_t destroy; 545 void *user_data; 546 hb_memory_mode_t mm; 547 548 /* This is a hell of a lot of code for just reading a file! */ 549 if (!font_file) 550 fail (true, "No font file set"); 551 552 if (0 == strcmp (font_file, "-")) { 553 /* read it */ 554 GString *gs = g_string_new (NULL); 555 char buf[BUFSIZ]; 556 #if defined(_WIN32) || defined(__CYGWIN__) 557 setmode (fileno (stdin), O_BINARY); 558 #endif 559 while (!feof (stdin)) { 560 size_t ret = fread (buf, 1, sizeof (buf), stdin); 561 if (ferror (stdin)) 562 fail (false, "Failed reading font from standard input: %s", 563 strerror (errno)); 564 g_string_append_len (gs, buf, ret); 565 } 566 len = gs->len; 567 font_data = g_string_free (gs, false); 568 user_data = font_data; 569 destroy = (hb_destroy_func_t) g_free; 570 mm = HB_MEMORY_MODE_WRITABLE; 571 } else { 572 GError *error = NULL; 573 GMappedFile *mf = g_mapped_file_new (font_file, false, &error); 574 if (mf) { 575 font_data = g_mapped_file_get_contents (mf); 576 len = g_mapped_file_get_length (mf); 577 if (len) { 578 destroy = (hb_destroy_func_t) g_mapped_file_unref; 579 user_data = (void *) mf; 580 mm = HB_MEMORY_MODE_READONLY_MAY_MAKE_WRITABLE; 581 } else 582 g_mapped_file_unref (mf); 583 } else { 584 fail (false, "%s", error->message); 585 //g_error_free (error); 586 } 587 if (!len) { 588 /* GMappedFile is buggy, it doesn't fail if file isn't regular. 589 * Try reading. 590 * https://bugzilla.gnome.org/show_bug.cgi?id=659212 */ 591 GError *error = NULL; 592 gsize l; 593 if (g_file_get_contents (font_file, &font_data, &l, &error)) { 594 len = l; 595 destroy = (hb_destroy_func_t) g_free; 596 user_data = (void *) font_data; 597 mm = HB_MEMORY_MODE_WRITABLE; 598 } else { 599 fail (false, "%s", error->message); 600 //g_error_free (error); 601 } 602 } 603 } 604 605 if (debug) 606 mm = HB_MEMORY_MODE_DUPLICATE; 607 608 blob = hb_blob_create (font_data, len, mm, user_data, destroy); 609 } 610 611 /* Create the face */ 612 hb_face_t *face = hb_face_create (blob, face_index); 613 hb_blob_destroy (blob); 614 615 616 font = hb_font_create (face); 617 618 if (font_size_x == FONT_SIZE_UPEM) 619 font_size_x = hb_face_get_upem (face); 620 if (font_size_y == FONT_SIZE_UPEM) 621 font_size_y = hb_face_get_upem (face); 622 623 int scale_x = (int) scalbnf (font_size_x, subpixel_bits); 624 int scale_y = (int) scalbnf (font_size_y, subpixel_bits); 625 hb_font_set_scale (font, scale_x, scale_y); 626 hb_face_destroy (face); 627 628 hb_font_set_variations (font, variations, num_variations); 629 630 void (*set_font_funcs) (hb_font_t *) = NULL; 631 if (!font_funcs) 632 { 633 set_font_funcs = supported_font_funcs[0].func; 634 } 635 else 636 { 637 for (unsigned int i = 0; i < ARRAY_LENGTH (supported_font_funcs); i++) 638 if (0 == g_ascii_strcasecmp (font_funcs, supported_font_funcs[i].name)) 639 { 640 set_font_funcs = supported_font_funcs[i].func; 641 break; 642 } 643 if (!set_font_funcs) 644 { 645 GString *s = g_string_new (NULL); 646 for (unsigned int i = 0; i < ARRAY_LENGTH (supported_font_funcs); i++) 647 { 648 if (i) 649 g_string_append_c (s, '/'); 650 g_string_append (s, supported_font_funcs[i].name); 651 } 652 char *p = g_string_free (s, FALSE); 653 fail (false, "Unknown font function implementation `%s'; supported values are: %s; default is %s", 654 font_funcs, 655 p, 656 supported_font_funcs[0].name); 657 //free (p); 658 } 659 } 660 set_font_funcs (font); 661 662 return font; 663 } 664 665 666 const char * 667 text_options_t::get_line (unsigned int *len) 668 { 669 if (text) { 670 if (!line) line = text; 671 if (line_len == (unsigned int) -1) 672 line_len = strlen (line); 673 674 if (!line_len) { 675 *len = 0; 676 return NULL; 677 } 678 679 const char *ret = line; 680 const char *p = (const char *) memchr (line, '\n', line_len); 681 unsigned int ret_len; 682 if (!p) { 683 ret_len = line_len; 684 line += ret_len; 685 line_len = 0; 686 } else { 687 ret_len = p - ret; 688 line += ret_len + 1; 689 line_len -= ret_len + 1; 690 } 691 692 *len = ret_len; 693 return ret; 694 } 695 696 if (!fp) { 697 if (!text_file) 698 fail (true, "At least one of text or text-file must be set"); 699 700 if (0 != strcmp (text_file, "-")) 701 fp = fopen (text_file, "r"); 702 else 703 fp = stdin; 704 705 if (!fp) 706 fail (false, "Failed opening text file `%s': %s", 707 text_file, strerror (errno)); 708 709 gs = g_string_new (NULL); 710 } 711 712 g_string_set_size (gs, 0); 713 char buf[BUFSIZ]; 714 while (fgets (buf, sizeof (buf), fp)) { 715 unsigned int bytes = strlen (buf); 716 if (bytes && buf[bytes - 1] == '\n') { 717 bytes--; 718 g_string_append_len (gs, buf, bytes); 719 break; 720 } 721 g_string_append_len (gs, buf, bytes); 722 } 723 if (ferror (fp)) 724 fail (false, "Failed reading text: %s", 725 strerror (errno)); 726 *len = gs->len; 727 return !*len && feof (fp) ? NULL : gs->str; 728 } 729 730 731 FILE * 732 output_options_t::get_file_handle (void) 733 { 734 if (fp) 735 return fp; 736 737 if (output_file) 738 fp = fopen (output_file, "wb"); 739 else { 740 #if defined(_WIN32) || defined(__CYGWIN__) 741 setmode (fileno (stdout), O_BINARY); 742 #endif 743 fp = stdout; 744 } 745 if (!fp) 746 fail (false, "Cannot open output file `%s': %s", 747 g_filename_display_name (output_file), strerror (errno)); 748 749 return fp; 750 } 751 752 static gboolean 753 parse_verbose (const char *name G_GNUC_UNUSED, 754 const char *arg G_GNUC_UNUSED, 755 gpointer data G_GNUC_UNUSED, 756 GError **error G_GNUC_UNUSED) 757 { 758 format_options_t *format_opts = (format_options_t *) data; 759 format_opts->show_text = format_opts->show_unicode = format_opts->show_line_num = true; 760 return true; 761 } 762 763 void 764 format_options_t::add_options (option_parser_t *parser) 765 { 766 GOptionEntry entries[] = 767 { 768 {"show-text", 0, 0, G_OPTION_ARG_NONE, &this->show_text, "Prefix each line of output with its corresponding input text", NULL}, 769 {"show-unicode", 0, 0, G_OPTION_ARG_NONE, &this->show_unicode, "Prefix each line of output with its corresponding input codepoint(s)", NULL}, 770 {"show-line-num", 0, 0, G_OPTION_ARG_NONE, &this->show_line_num, "Prefix each line of output with its corresponding input line number", NULL}, 771 {"verbose", 0, G_OPTION_FLAG_NO_ARG, 772 G_OPTION_ARG_CALLBACK, (gpointer) &parse_verbose, "Prefix each line of output with all of the above", NULL}, 773 {"no-glyph-names", 0, G_OPTION_FLAG_REVERSE, 774 G_OPTION_ARG_NONE, &this->show_glyph_names, "Output glyph indices instead of names", NULL}, 775 {"no-positions", 0, G_OPTION_FLAG_REVERSE, 776 G_OPTION_ARG_NONE, &this->show_positions, "Do not output glyph positions", NULL}, 777 {"no-clusters", 0, G_OPTION_FLAG_REVERSE, 778 G_OPTION_ARG_NONE, &this->show_clusters, "Do not output cluster indices", NULL}, 779 {"show-extents", 0, 0, G_OPTION_ARG_NONE, &this->show_extents, "Output glyph extents", NULL}, 780 {NULL} 781 }; 782 parser->add_group (entries, 783 "output-syntax", 784 "Output syntax:\n" 785 " text: [<glyph name or index>=<glyph cluster index within input>@<horizontal displacement>,<vertical displacement>+<horizontal advance>,<vertical advance>|...]\n" 786 " json: [{\"g\": <glyph name or index>, \"ax\": <horizontal advance>, \"ay\": <vertical advance>, \"dx\": <horizontal displacement>, \"dy\": <vertical displacement>, \"cl\": <glyph cluster index within input>}, ...]\n" 787 "\nOutput syntax options:", 788 "Options for the syntax of the output", 789 this); 790 } 791 792 void 793 format_options_t::serialize_unicode (hb_buffer_t *buffer, 794 GString *gs) 795 { 796 unsigned int num_glyphs = hb_buffer_get_length (buffer); 797 hb_glyph_info_t *info = hb_buffer_get_glyph_infos (buffer, NULL); 798 799 g_string_append_c (gs, '<'); 800 for (unsigned int i = 0; i < num_glyphs; i++) 801 { 802 if (i) 803 g_string_append_c (gs, ','); 804 g_string_append_printf (gs, "U+%04X", info->codepoint); 805 info++; 806 } 807 g_string_append_c (gs, '>'); 808 } 809 810 void 811 format_options_t::serialize_glyphs (hb_buffer_t *buffer, 812 hb_font_t *font, 813 hb_buffer_serialize_format_t output_format, 814 hb_buffer_serialize_flags_t flags, 815 GString *gs) 816 { 817 g_string_append_c (gs, '['); 818 unsigned int num_glyphs = hb_buffer_get_length (buffer); 819 unsigned int start = 0; 820 821 while (start < num_glyphs) { 822 char buf[1024]; 823 unsigned int consumed; 824 start += hb_buffer_serialize_glyphs (buffer, start, num_glyphs, 825 buf, sizeof (buf), &consumed, 826 font, output_format, flags); 827 if (!consumed) 828 break; 829 g_string_append (gs, buf); 830 } 831 g_string_append_c (gs, ']'); 832 } 833 void 834 format_options_t::serialize_line_no (unsigned int line_no, 835 GString *gs) 836 { 837 if (show_line_num) 838 g_string_append_printf (gs, "%d: ", line_no); 839 } 840 void 841 format_options_t::serialize_buffer_of_text (hb_buffer_t *buffer, 842 unsigned int line_no, 843 const char *text, 844 unsigned int text_len, 845 hb_font_t *font, 846 GString *gs) 847 { 848 if (show_text) { 849 serialize_line_no (line_no, gs); 850 g_string_append_c (gs, '('); 851 g_string_append_len (gs, text, text_len); 852 g_string_append_c (gs, ')'); 853 g_string_append_c (gs, '\n'); 854 } 855 856 if (show_unicode) { 857 serialize_line_no (line_no, gs); 858 serialize_unicode (buffer, gs); 859 g_string_append_c (gs, '\n'); 860 } 861 } 862 void 863 format_options_t::serialize_message (unsigned int line_no, 864 const char *msg, 865 GString *gs) 866 { 867 serialize_line_no (line_no, gs); 868 g_string_append_printf (gs, "%s", msg); 869 g_string_append_c (gs, '\n'); 870 } 871 void 872 format_options_t::serialize_buffer_of_glyphs (hb_buffer_t *buffer, 873 unsigned int line_no, 874 const char *text, 875 unsigned int text_len, 876 hb_font_t *font, 877 hb_buffer_serialize_format_t output_format, 878 hb_buffer_serialize_flags_t format_flags, 879 GString *gs) 880 { 881 serialize_line_no (line_no, gs); 882 serialize_glyphs (buffer, font, output_format, format_flags, gs); 883 g_string_append_c (gs, '\n'); 884 } 885
