1 /*
2 * Copyright © 2010 Behdad Esfahbod
3 * Copyright © 2011,2012 Google, Inc.
4 *
5 * This is part of HarfBuzz, a text shaping library.
6 *
7 * Permission is hereby granted, without written agreement and without
8 * license or royalty fees, to use, copy, modify, and distribute this
9 * software and its documentation for any purpose, provided that the
10 * above copyright notice and the following two paragraphs appear in
11 * all copies of this software.
12 *
13 * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
14 * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
15 * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
16 * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
17 * DAMAGE.
18 *
19 * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
20 * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
21 * FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
22 * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
23 * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
24 *
25 * Google Author(s): Garret Rieger, Rod Sheeter
26 */
27
28 #include <stdio.h>
29
30 #include "main-font-text.hh"
31 #include "hb-subset.h"
32
33 /*
34 * Command line interface to the harfbuzz font subsetter.
35 */
36
37 struct subset_consumer_t
38 {
subset_consumer_tsubset_consumer_t39 subset_consumer_t (option_parser_t *parser)
40 : failed (false), options (parser), subset_options (parser), font (nullptr), input (nullptr) {}
41
initsubset_consumer_t42 void init (hb_buffer_t *buffer_,
43 const font_options_t *font_opts)
44 {
45 font = hb_font_reference (font_opts->get_font ());
46 input = hb_subset_input_reference (subset_options.input);
47 }
48
consume_linesubset_consumer_t49 void consume_line (const char *text,
50 unsigned int text_len,
51 const char *text_before,
52 const char *text_after)
53 {
54 // TODO(Q1) does this only get called with at least 1 codepoint?
55 hb_set_t *codepoints = hb_subset_input_unicode_set (input);
56 if (0 == strcmp (text, "*"))
57 {
58 hb_face_t *face = hb_font_get_face (font);
59 hb_face_collect_unicodes (face, codepoints);
60 return;
61 }
62
63 gchar *c = (gchar *)text;
64 do {
65 gunichar cp = g_utf8_get_char(c);
66 hb_codepoint_t hb_cp = cp;
67 hb_set_add (codepoints, hb_cp);
68 } while ((c = g_utf8_find_next_char(c, text + text_len)));
69 }
70
71 hb_bool_t
write_filesubset_consumer_t72 write_file (const char *output_file, hb_blob_t *blob) {
73 unsigned int size;
74 const char* data = hb_blob_get_data (blob, &size);
75
76 if (!output_file)
77 fail (true, "No output file was specified");
78
79 FILE *fp = fopen(output_file, "wb");
80 if (!fp)
81 fail (false, "Cannot open output file `%s': %s",
82 g_filename_display_name (output_file), strerror (errno));
83
84 while (size) {
85 size_t ret = fwrite (data, 1, size, fp);
86 size -= ret;
87 data += ret;
88 if (size && ferror (fp))
89 fail (false, "Failed to write output: %s", strerror (errno));
90 }
91
92 fclose (fp);
93
94 return true;
95 }
96
finishsubset_consumer_t97 void finish (const font_options_t *font_opts)
98 {
99 hb_face_t *face = hb_font_get_face (font);
100
101 hb_face_t *new_face = hb_subset (face, input);
102 hb_blob_t *result = hb_face_reference_blob (new_face);
103
104 failed = !hb_blob_get_length (result);
105 if (!failed)
106 write_file (options.output_file, result);
107
108 hb_subset_input_destroy (input);
109 hb_blob_destroy (result);
110 hb_face_destroy (new_face);
111 hb_font_destroy (font);
112 }
113
114 public:
115 bool failed;
116
117 private:
118 output_options_t options;
119 subset_options_t subset_options;
120 hb_font_t *font;
121 hb_subset_input_t *input;
122 };
123
124 int
main(int argc,char ** argv)125 main (int argc, char **argv)
126 {
127 main_font_text_t<subset_consumer_t, 10, 0> driver;
128 return driver.main (argc, argv);
129 }
130