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 } 256 257 258 void 259 view_options_t::add_options (option_parser_t *parser) 260 { 261 GOptionEntry entries[] = 262 { 263 {"annotate", 0, 0, G_OPTION_ARG_NONE, &this->annotate, "Annotate output rendering", NULL}, 264 {"background", 0, 0, G_OPTION_ARG_STRING, &this->back, "Set background color (default: " DEFAULT_BACK ")", "rrggbb/rrggbbaa"}, 265 {"foreground", 0, 0, G_OPTION_ARG_STRING, &this->fore, "Set foreground color (default: " DEFAULT_FORE ")", "rrggbb/rrggbbaa"}, 266 {"line-space", 0, 0, G_OPTION_ARG_DOUBLE, &this->line_space, "Set space between lines (default: 0)", "units"}, 267 {"margin", 0, 0, G_OPTION_ARG_CALLBACK, (gpointer) &parse_margin, "Margin around output (default: " G_STRINGIFY(DEFAULT_MARGIN) ")","one to four numbers"}, 268 {NULL} 269 }; 270 parser->add_group (entries, 271 "view", 272 "View options:", 273 "Options controlling output rendering", 274 this); 275 } 276 277 void 278 shape_options_t::add_options (option_parser_t *parser) 279 { 280 GOptionEntry entries[] = 281 { 282 {"list-shapers", 0, G_OPTION_FLAG_NO_ARG, 283 G_OPTION_ARG_CALLBACK, (gpointer) &list_shapers, "List available shapers and quit", NULL}, 284 {"shaper", 0, G_OPTION_FLAG_HIDDEN, 285 G_OPTION_ARG_CALLBACK, (gpointer) &parse_shapers, "Hidden duplicate of --shapers", NULL}, 286 {"shapers", 0, 0, G_OPTION_ARG_CALLBACK, (gpointer) &parse_shapers, "Set comma-separated list of shapers to try","list"}, 287 {"direction", 0, 0, G_OPTION_ARG_STRING, &this->direction, "Set text direction (default: auto)", "ltr/rtl/ttb/btt"}, 288 {"language", 0, 0, G_OPTION_ARG_STRING, &this->language, "Set text language (default: $LANG)", "langstr"}, 289 {"script", 0, 0, G_OPTION_ARG_STRING, &this->script, "Set text script (default: auto)", "ISO-15924 tag"}, 290 {"bot", 0, 0, G_OPTION_ARG_NONE, &this->bot, "Treat text as beginning-of-paragraph", NULL}, 291 {"eot", 0, 0, G_OPTION_ARG_NONE, &this->eot, "Treat text as end-of-paragraph", NULL}, 292 {"preserve-default-ignorables",0, 0, G_OPTION_ARG_NONE, &this->preserve_default_ignorables, "Preserve Default-Ignorable characters", NULL}, 293 {"utf8-clusters", 0, 0, G_OPTION_ARG_NONE, &this->utf8_clusters, "Use UTF8 byte indices, not char indices", NULL}, 294 {"cluster-level", 0, 0, G_OPTION_ARG_INT, &this->cluster_level, "Cluster merging level (default: 0)", "0/1/2"}, 295 {"normalize-glyphs",0, 0, G_OPTION_ARG_NONE, &this->normalize_glyphs, "Rearrange glyph clusters in nominal order", NULL}, 296 {"num-iterations", 0, 0, G_OPTION_ARG_INT, &this->num_iterations, "Run shaper N times (default: 1)", "N"}, 297 {NULL} 298 }; 299 parser->add_group (entries, 300 "shape", 301 "Shape options:", 302 "Options controlling the shaping process", 303 this); 304 305 const gchar *features_help = "Comma-separated list of font features\n" 306 "\n" 307 " Features can be enabled or disabled, either globally or limited to\n" 308 " specific character ranges. The format for specifying feature settings\n" 309 " follows. All valid CSS font-feature-settings values other than 'normal'\n" 310 " and 'inherited' are also accepted, though, not documented below.\n" 311 "\n" 312 " The range indices refer to the positions between Unicode characters,\n" 313 " unless the --utf8-clusters is provided, in which case range indices\n" 314 " refer to UTF-8 byte indices. The position before the first character\n" 315 " is always 0.\n" 316 "\n" 317 " The format is Python-esque. Here is how it all works:\n" 318 "\n" 319 " Syntax: Value: Start: End:\n" 320 "\n" 321 " Setting value:\n" 322 " \"kern\" 1 0 # Turn feature on\n" 323 " \"+kern\" 1 0 # Turn feature on\n" 324 " \"-kern\" 0 0 # Turn feature off\n" 325 " \"kern=0\" 0 0 # Turn feature off\n" 326 " \"kern=1\" 1 0 # Turn feature on\n" 327 " \"aalt=2\" 2 0 # Choose 2nd alternate\n" 328 "\n" 329 " Setting index:\n" 330 " \"kern[]\" 1 0 # Turn feature on\n" 331 " \"kern[:]\" 1 0 # Turn feature on\n" 332 " \"kern[5:]\" 1 5 # Turn feature on, partial\n" 333 " \"kern[:5]\" 1 0 5 # Turn feature on, partial\n" 334 " \"kern[3:5]\" 1 3 5 # Turn feature on, range\n" 335 " \"kern[3]\" 1 3 3+1 # Turn feature on, single char\n" 336 "\n" 337 " Mixing it all:\n" 338 "\n" 339 " \"aalt[3:5]=2\" 2 3 5 # Turn 2nd alternate on for range"; 340 341 GOptionEntry entries2[] = 342 { 343 {"features", 0, 0, G_OPTION_ARG_CALLBACK, (gpointer) &parse_features, features_help, "list"}, 344 {NULL} 345 }; 346 parser->add_group (entries2, 347 "features", 348 "Features options:", 349 "Options controlling font features used", 350 this); 351 } 352 353 static gboolean 354 parse_font_size (const char *name G_GNUC_UNUSED, 355 const char *arg, 356 gpointer data, 357 GError **error G_GNUC_UNUSED) 358 { 359 font_options_t *font_opts = (font_options_t *) data; 360 if (0 == strcmp (arg, "upem")) 361 { 362 font_opts->font_size_y = font_opts->font_size_x = FONT_SIZE_UPEM; 363 return true; 364 } 365 switch (sscanf (arg, "%lf%*[ ,]%lf", &font_opts->font_size_x, &font_opts->font_size_y)) { 366 case 1: font_opts->font_size_y = font_opts->font_size_x; 367 case 2: return true; 368 default: 369 g_set_error (error, G_OPTION_ERROR, G_OPTION_ERROR_BAD_VALUE, 370 "%s argument should be one to four space-separated numbers", 371 name); 372 return false; 373 } 374 } 375 void 376 font_options_t::add_options (option_parser_t *parser) 377 { 378 char *text = NULL; 379 380 { 381 ASSERT_STATIC (ARRAY_LENGTH_CONST (supported_font_funcs) > 0); 382 GString *s = g_string_new (NULL); 383 g_string_printf (s, "Set font functions implementation to use (default: %s)\n\n Supported font function implementations are: %s", 384 supported_font_funcs[0].name, 385 supported_font_funcs[0].name); 386 for (unsigned int i = 1; i < ARRAY_LENGTH (supported_font_funcs); i++) 387 { 388 g_string_append_c (s, '/'); 389 g_string_append (s, supported_font_funcs[i].name); 390 } 391 text = g_string_free (s, FALSE); 392 parser->free_later (text); 393 } 394 395 char *font_size_text; 396 if (default_font_size == FONT_SIZE_UPEM) 397 font_size_text = (char *) "Font size (default: upem)"; 398 else 399 { 400 font_size_text = g_strdup_printf ("Font size (default: %d)", default_font_size); 401 parser->free_later (font_size_text); 402 } 403 404 GOptionEntry entries[] = 405 { 406 {"font-file", 0, 0, G_OPTION_ARG_STRING, &this->font_file, "Set font file-name", "filename"}, 407 {"face-index", 0, 0, G_OPTION_ARG_INT, &this->face_index, "Set face index (default: 0)", "index"}, 408 {"font-size", 0, default_font_size ? 0 : G_OPTION_FLAG_HIDDEN, 409 G_OPTION_ARG_CALLBACK, (gpointer) &parse_font_size, font_size_text, "1/2 numbers or 'upem'"}, 410 {"font-funcs", 0, 0, G_OPTION_ARG_STRING, &this->font_funcs, text, "impl"}, 411 {NULL} 412 }; 413 parser->add_group (entries, 414 "font", 415 "Font options:", 416 "Options controlling the font", 417 this); 418 } 419 420 void 421 text_options_t::add_options (option_parser_t *parser) 422 { 423 GOptionEntry entries[] = 424 { 425 {"text", 0, 0, G_OPTION_ARG_STRING, &this->text, "Set input text", "string"}, 426 {"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"}, 427 {"text-before", 0, 0, G_OPTION_ARG_STRING, &this->text_before, "Set text context before each line", "string"}, 428 {"text-after", 0, 0, G_OPTION_ARG_STRING, &this->text_after, "Set text context after each line", "string"}, 429 {NULL} 430 }; 431 parser->add_group (entries, 432 "text", 433 "Text options:", 434 "Options controlling the input text", 435 this); 436 } 437 438 void 439 output_options_t::add_options (option_parser_t *parser) 440 { 441 const char *text; 442 443 if (NULL == supported_formats) 444 text = "Set output serialization format"; 445 else 446 { 447 char *items = g_strjoinv ("/", const_cast<char **> (supported_formats)); 448 text = g_strdup_printf ("Set output format\n\n Supported output formats are: %s", items); 449 g_free (items); 450 parser->free_later ((char *) text); 451 } 452 453 GOptionEntry entries[] = 454 { 455 {"output-file", 0, 0, G_OPTION_ARG_STRING, &this->output_file, "Set output file-name (default: stdout)","filename"}, 456 {"output-format", 0, 0, G_OPTION_ARG_STRING, &this->output_format, text, "format"}, 457 {NULL} 458 }; 459 parser->add_group (entries, 460 "output", 461 "Output destination & format options:", 462 "Options controlling the destination and form of the output", 463 this); 464 } 465 466 467 468 hb_font_t * 469 font_options_t::get_font (void) const 470 { 471 if (font) 472 return font; 473 474 hb_blob_t *blob = NULL; 475 476 /* Create the blob */ 477 { 478 char *font_data; 479 unsigned int len = 0; 480 hb_destroy_func_t destroy; 481 void *user_data; 482 hb_memory_mode_t mm; 483 484 /* This is a hell of a lot of code for just reading a file! */ 485 if (!font_file) 486 fail (true, "No font file set"); 487 488 if (0 == strcmp (font_file, "-")) { 489 /* read it */ 490 GString *gs = g_string_new (NULL); 491 char buf[BUFSIZ]; 492 #if defined(_WIN32) || defined(__CYGWIN__) 493 setmode (fileno (stdin), O_BINARY); 494 #endif 495 while (!feof (stdin)) { 496 size_t ret = fread (buf, 1, sizeof (buf), stdin); 497 if (ferror (stdin)) 498 fail (false, "Failed reading font from standard input: %s", 499 strerror (errno)); 500 g_string_append_len (gs, buf, ret); 501 } 502 len = gs->len; 503 font_data = g_string_free (gs, false); 504 user_data = font_data; 505 destroy = (hb_destroy_func_t) g_free; 506 mm = HB_MEMORY_MODE_WRITABLE; 507 } else { 508 GError *error = NULL; 509 GMappedFile *mf = g_mapped_file_new (font_file, false, &error); 510 if (mf) { 511 font_data = g_mapped_file_get_contents (mf); 512 len = g_mapped_file_get_length (mf); 513 if (len) { 514 destroy = (hb_destroy_func_t) g_mapped_file_unref; 515 user_data = (void *) mf; 516 mm = HB_MEMORY_MODE_READONLY_MAY_MAKE_WRITABLE; 517 } else 518 g_mapped_file_unref (mf); 519 } else { 520 fail (false, "%s", error->message); 521 //g_error_free (error); 522 } 523 if (!len) { 524 /* GMappedFile is buggy, it doesn't fail if file isn't regular. 525 * Try reading. 526 * https://bugzilla.gnome.org/show_bug.cgi?id=659212 */ 527 GError *error = NULL; 528 gsize l; 529 if (g_file_get_contents (font_file, &font_data, &l, &error)) { 530 len = l; 531 destroy = (hb_destroy_func_t) g_free; 532 user_data = (void *) font_data; 533 mm = HB_MEMORY_MODE_WRITABLE; 534 } else { 535 fail (false, "%s", error->message); 536 //g_error_free (error); 537 } 538 } 539 } 540 541 if (debug) 542 mm = HB_MEMORY_MODE_DUPLICATE; 543 544 blob = hb_blob_create (font_data, len, mm, user_data, destroy); 545 } 546 547 /* Create the face */ 548 hb_face_t *face = hb_face_create (blob, face_index); 549 hb_blob_destroy (blob); 550 551 552 font = hb_font_create (face); 553 554 if (font_size_x == FONT_SIZE_UPEM) 555 font_size_x = hb_face_get_upem (face); 556 if (font_size_y == FONT_SIZE_UPEM) 557 font_size_y = hb_face_get_upem (face); 558 559 int scale_x = (int) scalbnf (font_size_x, subpixel_bits); 560 int scale_y = (int) scalbnf (font_size_y, subpixel_bits); 561 hb_font_set_scale (font, scale_x, scale_y); 562 hb_face_destroy (face); 563 564 void (*set_font_funcs) (hb_font_t *) = NULL; 565 if (!font_funcs) 566 { 567 set_font_funcs = supported_font_funcs[0].func; 568 } 569 else 570 { 571 for (unsigned int i = 0; i < ARRAY_LENGTH (supported_font_funcs); i++) 572 if (0 == g_ascii_strcasecmp (font_funcs, supported_font_funcs[i].name)) 573 { 574 set_font_funcs = supported_font_funcs[i].func; 575 break; 576 } 577 if (!set_font_funcs) 578 { 579 GString *s = g_string_new (NULL); 580 for (unsigned int i = 0; i < ARRAY_LENGTH (supported_font_funcs); i++) 581 { 582 if (i) 583 g_string_append_c (s, '/'); 584 g_string_append (s, supported_font_funcs[i].name); 585 } 586 char *p = g_string_free (s, FALSE); 587 fail (false, "Unknown font function implementation `%s'; supported values are: %s; default is %s", 588 font_funcs, 589 p, 590 supported_font_funcs[0].name); 591 //free (p); 592 } 593 } 594 set_font_funcs (font); 595 596 return font; 597 } 598 599 600 const char * 601 text_options_t::get_line (unsigned int *len) 602 { 603 if (text) { 604 if (!line) line = text; 605 if (line_len == (unsigned int) -1) 606 line_len = strlen (line); 607 608 if (!line_len) { 609 *len = 0; 610 return NULL; 611 } 612 613 const char *ret = line; 614 const char *p = (const char *) memchr (line, '\n', line_len); 615 unsigned int ret_len; 616 if (!p) { 617 ret_len = line_len; 618 line += ret_len; 619 line_len = 0; 620 } else { 621 ret_len = p - ret; 622 line += ret_len + 1; 623 line_len -= ret_len + 1; 624 } 625 626 *len = ret_len; 627 return ret; 628 } 629 630 if (!fp) { 631 if (!text_file) 632 fail (true, "At least one of text or text-file must be set"); 633 634 if (0 != strcmp (text_file, "-")) 635 fp = fopen (text_file, "r"); 636 else 637 fp = stdin; 638 639 if (!fp) 640 fail (false, "Failed opening text file `%s': %s", 641 text_file, strerror (errno)); 642 643 gs = g_string_new (NULL); 644 } 645 646 g_string_set_size (gs, 0); 647 char buf[BUFSIZ]; 648 while (fgets (buf, sizeof (buf), fp)) { 649 unsigned int bytes = strlen (buf); 650 if (bytes && buf[bytes - 1] == '\n') { 651 bytes--; 652 g_string_append_len (gs, buf, bytes); 653 break; 654 } 655 g_string_append_len (gs, buf, bytes); 656 } 657 if (ferror (fp)) 658 fail (false, "Failed reading text: %s", 659 strerror (errno)); 660 *len = gs->len; 661 return !*len && feof (fp) ? NULL : gs->str; 662 } 663 664 665 FILE * 666 output_options_t::get_file_handle (void) 667 { 668 if (fp) 669 return fp; 670 671 if (output_file) 672 fp = fopen (output_file, "wb"); 673 else { 674 #if defined(_WIN32) || defined(__CYGWIN__) 675 setmode (fileno (stdout), O_BINARY); 676 #endif 677 fp = stdout; 678 } 679 if (!fp) 680 fail (false, "Cannot open output file `%s': %s", 681 g_filename_display_name (output_file), strerror (errno)); 682 683 return fp; 684 } 685 686 static gboolean 687 parse_verbose (const char *name G_GNUC_UNUSED, 688 const char *arg G_GNUC_UNUSED, 689 gpointer data G_GNUC_UNUSED, 690 GError **error G_GNUC_UNUSED) 691 { 692 format_options_t *format_opts = (format_options_t *) data; 693 format_opts->show_text = format_opts->show_unicode = format_opts->show_line_num = true; 694 return true; 695 } 696 697 void 698 format_options_t::add_options (option_parser_t *parser) 699 { 700 GOptionEntry entries[] = 701 { 702 {"show-text", 0, 0, G_OPTION_ARG_NONE, &this->show_text, "Prefix each line of output with its corresponding input text", NULL}, 703 {"show-unicode", 0, 0, G_OPTION_ARG_NONE, &this->show_unicode, "Prefix each line of output with its corresponding input codepoint(s)", NULL}, 704 {"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}, 705 {"verbose", 0, G_OPTION_FLAG_NO_ARG, 706 G_OPTION_ARG_CALLBACK, (gpointer) &parse_verbose, "Prefix each line of output with all of the above", NULL}, 707 {"no-glyph-names", 0, G_OPTION_FLAG_REVERSE, 708 G_OPTION_ARG_NONE, &this->show_glyph_names, "Output glyph indices instead of names", NULL}, 709 {"no-positions", 0, G_OPTION_FLAG_REVERSE, 710 G_OPTION_ARG_NONE, &this->show_positions, "Do not output glyph positions", NULL}, 711 {"no-clusters", 0, G_OPTION_FLAG_REVERSE, 712 G_OPTION_ARG_NONE, &this->show_clusters, "Do not output cluster indices", NULL}, 713 {"show-extents", 0, 0, G_OPTION_ARG_NONE, &this->show_extents, "Output glyph extents", NULL}, 714 {NULL} 715 }; 716 parser->add_group (entries, 717 "output-syntax", 718 "Output syntax:\n" 719 " text: [<glyph name or index>=<glyph cluster index within input>@<horizontal displacement>,<vertical displacement>+<horizontal advance>,<vertical advance>|...]\n" 720 " 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" 721 "\nOutput syntax options:", 722 "Options controlling the syntax of the output", 723 this); 724 } 725 726 void 727 format_options_t::serialize_unicode (hb_buffer_t *buffer, 728 GString *gs) 729 { 730 unsigned int num_glyphs = hb_buffer_get_length (buffer); 731 hb_glyph_info_t *info = hb_buffer_get_glyph_infos (buffer, NULL); 732 733 g_string_append_c (gs, '<'); 734 for (unsigned int i = 0; i < num_glyphs; i++) 735 { 736 if (i) 737 g_string_append_c (gs, ','); 738 g_string_append_printf (gs, "U+%04X", info->codepoint); 739 info++; 740 } 741 g_string_append_c (gs, '>'); 742 } 743 744 void 745 format_options_t::serialize_glyphs (hb_buffer_t *buffer, 746 hb_font_t *font, 747 hb_buffer_serialize_format_t output_format, 748 hb_buffer_serialize_flags_t flags, 749 GString *gs) 750 { 751 g_string_append_c (gs, '['); 752 unsigned int num_glyphs = hb_buffer_get_length (buffer); 753 unsigned int start = 0; 754 755 while (start < num_glyphs) { 756 char buf[1024]; 757 unsigned int consumed; 758 start += hb_buffer_serialize_glyphs (buffer, start, num_glyphs, 759 buf, sizeof (buf), &consumed, 760 font, output_format, flags); 761 if (!consumed) 762 break; 763 g_string_append (gs, buf); 764 } 765 g_string_append_c (gs, ']'); 766 } 767 void 768 format_options_t::serialize_line_no (unsigned int line_no, 769 GString *gs) 770 { 771 if (show_line_num) 772 g_string_append_printf (gs, "%d: ", line_no); 773 } 774 void 775 format_options_t::serialize_buffer_of_text (hb_buffer_t *buffer, 776 unsigned int line_no, 777 const char *text, 778 unsigned int text_len, 779 hb_font_t *font, 780 GString *gs) 781 { 782 if (show_text) { 783 serialize_line_no (line_no, gs); 784 g_string_append_c (gs, '('); 785 g_string_append_len (gs, text, text_len); 786 g_string_append_c (gs, ')'); 787 g_string_append_c (gs, '\n'); 788 } 789 790 if (show_unicode) { 791 serialize_line_no (line_no, gs); 792 serialize_unicode (buffer, gs); 793 g_string_append_c (gs, '\n'); 794 } 795 } 796 void 797 format_options_t::serialize_message (unsigned int line_no, 798 const char *msg, 799 GString *gs) 800 { 801 serialize_line_no (line_no, gs); 802 g_string_append_printf (gs, "%s", msg); 803 g_string_append_c (gs, '\n'); 804 } 805 void 806 format_options_t::serialize_buffer_of_glyphs (hb_buffer_t *buffer, 807 unsigned int line_no, 808 const char *text, 809 unsigned int text_len, 810 hb_font_t *font, 811 hb_buffer_serialize_format_t output_format, 812 hb_buffer_serialize_flags_t format_flags, 813 GString *gs) 814 { 815 serialize_line_no (line_no, gs); 816 serialize_glyphs (buffer, font, output_format, format_flags, gs); 817 g_string_append_c (gs, '\n'); 818 } 819
