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
fail(hb_bool_t suggest_help,const char * format,...)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 *
shapers_to_string(void)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
show_version(const char * name G_GNUC_UNUSED,const char * arg G_GNUC_UNUSED,gpointer data G_GNUC_UNUSED,GError ** error G_GNUC_UNUSED)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
add_main_options(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
pre_parse(GOptionContext * context G_GNUC_UNUSED,GOptionGroup * group G_GNUC_UNUSED,gpointer data,GError ** error)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
post_parse(GOptionContext * context G_GNUC_UNUSED,GOptionGroup * group G_GNUC_UNUSED,gpointer data,GError ** error)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
add_group(GOptionEntry * entries,const gchar * name,const gchar * description,const gchar * help_description,option_group_t * option_group)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
parse(int * argc,char *** argv)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
parse_margin(const char * name G_GNUC_UNUSED,const char * arg,gpointer data,GError ** error G_GNUC_UNUSED)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
parse_shapers(const char * name G_GNUC_UNUSED,const char * arg,gpointer data,GError ** error G_GNUC_UNUSED)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
list_shapers(const char * name G_GNUC_UNUSED,const char * arg G_GNUC_UNUSED,gpointer data G_GNUC_UNUSED,GError ** error G_GNUC_UNUSED)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
parse_features(const char * name G_GNUC_UNUSED,const char * arg,gpointer data,GError ** error G_GNUC_UNUSED)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
add_options(option_parser_t * parser)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
add_options(option_parser_t * parser)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
parse_font_size(const char * name G_GNUC_UNUSED,const char * arg,gpointer data,GError ** error G_GNUC_UNUSED)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
add_options(option_parser_t * parser)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
add_options(option_parser_t * parser)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
add_options(option_parser_t * parser)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 *
get_font(void) const469 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 *
get_line(unsigned int * len)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 *
get_file_handle(void)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
parse_verbose(const char * name G_GNUC_UNUSED,const char * arg G_GNUC_UNUSED,gpointer data G_GNUC_UNUSED,GError ** error G_GNUC_UNUSED)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
add_options(option_parser_t * parser)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
serialize_unicode(hb_buffer_t * buffer,GString * gs)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
serialize_glyphs(hb_buffer_t * buffer,hb_font_t * font,hb_buffer_serialize_format_t output_format,hb_buffer_serialize_flags_t flags,GString * gs)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
serialize_line_no(unsigned int line_no,GString * gs)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
serialize_buffer_of_text(hb_buffer_t * buffer,unsigned int line_no,const char * text,unsigned int text_len,hb_font_t * font,GString * gs)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
serialize_message(unsigned int line_no,const char * msg,GString * gs)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
serialize_buffer_of_glyphs(hb_buffer_t * buffer,unsigned int line_no,const char * text,unsigned int text_len,hb_font_t * font,hb_buffer_serialize_format_t output_format,hb_buffer_serialize_flags_t format_flags,GString * gs)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