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 { 39 subset_consumer_t (option_parser_t *parser) 40 : failed (false), options (parser), subset_options (parser), font (nullptr), input (nullptr) {} 41 42 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 49 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 65 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 90 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 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