2 * Copyright © 2011 Google, Inc.
4 * This is part of HarfBuzz, a text shaping library.
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.
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
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.
24 * Google Author(s): Behdad Esfahbod
44 #include <unistd.h> /* for isatty() */
47 #include <io.h> /* for _setmode() under Windows */
55 #include <glib/gprintf.h>
58 template <typename Type> static inline Type MIN (const Type &a, const Type &b) { return a < b ? a : b; }
61 template <typename Type> static inline Type MAX (const Type &a, const Type &b) { return a > b ? a : b; }
64 void fail (hb_bool_t suggest_help, const char *format, ...) G_GNUC_NORETURN;
67 extern hb_bool_t debug;
71 virtual void add_options (struct option_parser_t *parser) = 0;
73 virtual void pre_parse (GError **error G_GNUC_UNUSED) {};
74 virtual void post_parse (GError **error G_GNUC_UNUSED) {};
78 struct option_parser_t
80 option_parser_t (const char *usage) {
81 memset (this, 0, sizeof (*this));
83 context = g_option_context_new (usage);
87 ~option_parser_t (void) {
88 g_option_context_free (context);
91 void add_main_options (void);
93 void add_group (GOptionEntry *entries,
95 const gchar *description,
96 const gchar *help_description,
97 option_group_t *option_group);
99 void parse (int *argc, char ***argv);
101 G_GNUC_NORETURN void usage (void) {
102 g_printerr ("Usage: %s [OPTION...] %s\n", g_get_prgname (), usage_str);
106 const char *usage_str;
107 GOptionContext *context;
111 #define DEFAULT_MARGIN 16
112 #define DEFAULT_FORE "#000000"
113 #define DEFAULT_BACK "#FFFFFF"
114 #define DEFAULT_FONT_SIZE 256
116 struct view_options_t : option_group_t
118 view_options_t (option_parser_t *parser) {
123 margin.t = margin.r = margin.b = margin.l = DEFAULT_MARGIN;
124 font_size = DEFAULT_FONT_SIZE;
126 add_options (parser);
129 void add_options (option_parser_t *parser);
142 struct shape_options_t : option_group_t
144 shape_options_t (option_parser_t *parser)
146 direction = language = script = NULL;
147 bot = eot = preserve_default_ignorables = false;
151 utf8_clusters = false;
152 normalize_glyphs = false;
154 add_options (parser);
156 ~shape_options_t (void)
159 g_strfreev (shapers);
162 void add_options (option_parser_t *parser);
164 void setup_buffer (hb_buffer_t *buffer)
166 hb_buffer_set_direction (buffer, hb_direction_from_string (direction, -1));
167 hb_buffer_set_script (buffer, hb_script_from_string (script, -1));
168 hb_buffer_set_language (buffer, hb_language_from_string (language, -1));
169 hb_buffer_set_flags (buffer, (hb_buffer_flags_t) (HB_BUFFER_FLAGS_DEFAULT |
170 (bot ? HB_BUFFER_FLAG_BOT : 0) |
171 (eot ? HB_BUFFER_FLAG_EOT : 0) |
172 (preserve_default_ignorables ? HB_BUFFER_FLAG_PRESERVE_DEFAULT_IGNORABLES : 0)));
175 void populate_buffer (hb_buffer_t *buffer, const char *text, int text_len,
176 const char *text_before, const char *text_after)
178 hb_buffer_clear_contents (buffer);
180 unsigned int len = strlen (text_before);
181 hb_buffer_add_utf8 (buffer, text_before, len, len, 0);
183 hb_buffer_add_utf8 (buffer, text, text_len, 0, text_len);
185 hb_buffer_add_utf8 (buffer, text_after, -1, 0, 0);
188 if (!utf8_clusters) {
189 /* Reset cluster values to refer to Unicode character index
190 * instead of UTF-8 index. */
191 unsigned int num_glyphs = hb_buffer_get_length (buffer);
192 hb_glyph_info_t *info = hb_buffer_get_glyph_infos (buffer, NULL);
193 for (unsigned int i = 0; i < num_glyphs; i++)
200 setup_buffer (buffer);
203 hb_bool_t shape (hb_font_t *font, hb_buffer_t *buffer)
205 hb_bool_t res = hb_shape_full (font, buffer, features, num_features, shapers);
206 if (normalize_glyphs)
207 hb_buffer_normalize_glyphs (buffer);
211 void shape_closure (const char *text, int text_len,
212 hb_font_t *font, hb_buffer_t *buffer,
215 hb_buffer_reset (buffer);
216 hb_buffer_add_utf8 (buffer, text, text_len, 0, text_len);
217 setup_buffer (buffer);
218 hb_ot_shape_glyphs_closure (font, buffer, features, num_features, glyphs);
221 /* Buffer properties */
222 const char *direction;
223 const char *language;
229 hb_bool_t preserve_default_ignorables;
231 hb_feature_t *features;
232 unsigned int num_features;
234 hb_bool_t utf8_clusters;
235 hb_bool_t normalize_glyphs;
239 struct font_options_t : option_group_t
241 font_options_t (option_parser_t *parser) {
247 add_options (parser);
249 ~font_options_t (void) {
250 hb_font_destroy (font);
253 void add_options (option_parser_t *parser);
255 hb_font_t *get_font (void) const;
257 const char *font_file;
261 mutable hb_font_t *font;
265 struct text_options_t : option_group_t
267 text_options_t (option_parser_t *parser) {
276 text_len = (unsigned int) -1;
278 add_options (parser);
280 ~text_options_t (void) {
282 g_string_free (gs, true);
287 void add_options (option_parser_t *parser);
289 void post_parse (GError **error G_GNUC_UNUSED) {
290 if (text && text_file)
292 G_OPTION_ERROR, G_OPTION_ERROR_BAD_VALUE,
293 "Only one of text and text-file can be set");
297 const char *get_line (unsigned int *len);
299 const char *text_before;
300 const char *text_after;
303 const char *text_file;
308 unsigned int text_len;
311 struct output_options_t : option_group_t
313 output_options_t (option_parser_t *parser,
314 const char *supported_formats_ = NULL) {
316 output_format = NULL;
317 supported_formats = supported_formats_;
318 explicit_output_format = false;
322 add_options (parser);
324 ~output_options_t (void) {
329 void add_options (option_parser_t *parser);
331 void post_parse (GError **error G_GNUC_UNUSED)
334 explicit_output_format = true;
336 if (output_file && !output_format) {
337 output_format = strrchr (output_file, '.');
339 output_format++; /* skip the dot */
342 if (output_file && 0 == strcmp (output_file, "-"))
343 output_file = NULL; /* STDOUT */
346 FILE *get_file_handle (void);
348 const char *output_file;
349 const char *output_format;
350 const char *supported_formats;
351 bool explicit_output_format;
356 struct format_options_t : option_group_t
358 format_options_t (option_parser_t *parser) {
359 show_glyph_names = true;
360 show_positions = true;
361 show_clusters = true;
363 show_unicode = false;
364 show_line_num = false;
366 add_options (parser);
369 void add_options (option_parser_t *parser);
371 void serialize_unicode (hb_buffer_t *buffer,
373 void serialize_glyphs (hb_buffer_t *buffer,
375 hb_buffer_serialize_format_t format,
376 hb_buffer_serialize_flags_t flags,
378 void serialize_line_no (unsigned int line_no,
380 void serialize_buffer_of_text (hb_buffer_t *buffer,
381 unsigned int line_no,
383 unsigned int text_len,
386 void serialize_message (unsigned int line_no,
389 void serialize_buffer_of_glyphs (hb_buffer_t *buffer,
390 unsigned int line_no,
392 unsigned int text_len,
394 hb_buffer_serialize_format_t output_format,
395 hb_buffer_serialize_flags_t format_flags,
399 hb_bool_t show_glyph_names;
400 hb_bool_t show_positions;
401 hb_bool_t show_clusters;
403 hb_bool_t show_unicode;
404 hb_bool_t show_line_num;