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_create_or_fail ();
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 gchar *c = (gchar *)text;
57 do {
58 gunichar cp = g_utf8_get_char(c);
59 hb_codepoint_t hb_cp = cp;
60 hb_set_add (codepoints, hb_cp);
61 } while ((c = g_utf8_find_next_char(c, text + text_len)) != nullptr);
62 }
63
64 hb_bool_t
write_filesubset_consumer_t65 write_file (const char *output_file, hb_blob_t *blob) {
66 unsigned int data_length;
67 const char* data = hb_blob_get_data (blob, &data_length);
68
69 FILE *fp_out = fopen(output_file, "wb");
70 if (fp_out == nullptr) {
71 fprintf(stderr, "Unable to open output file\n");
72 return false;
73 }
74 int bytes_written = fwrite(data, 1, data_length, fp_out);
75
76 fclose (fp_out);
77
78 if (bytes_written == -1) {
79 fprintf(stderr, "Unable to write output file\n");
80 return false;
81 }
82 if ((unsigned int) bytes_written != data_length) {
83 fprintf(stderr, "Expected %u bytes written, got %d\n", data_length,
84 bytes_written);
85 return false;
86 }
87 return true;
88 }
89
finishsubset_consumer_t90 void finish (const font_options_t *font_opts)
91 {
92 hb_subset_input_set_drop_layout (input, !subset_options.keep_layout);
93 hb_subset_input_set_drop_hints (input, subset_options.drop_hints);
94 hb_subset_input_set_desubroutinize (input, subset_options.desubroutinize);
95
96 hb_face_t *face = hb_font_get_face (font);
97
98 hb_face_t *new_face = hb_subset (face, input);
99 hb_blob_t *result = hb_face_reference_blob (new_face);
100
101 failed = !hb_blob_get_length (result);
102 if (!failed)
103 write_file (options.output_file, result);
104
105 hb_subset_input_destroy (input);
106 hb_blob_destroy (result);
107 hb_face_destroy (new_face);
108 hb_font_destroy (font);
109 }
110
111 public:
112 bool failed;
113
114 private:
115 output_options_t options;
116 subset_options_t subset_options;
117 hb_font_t *font;
118 hb_subset_input_t *input;
119 };
120
121 int
main(int argc,char ** argv)122 main (int argc, char **argv)
123 {
124 main_font_text_t<subset_consumer_t, 10, 0> driver;
125 return driver.main (argc, argv);
126 }
127