128 lines
3.9 KiB
C++
128 lines
3.9 KiB
C++
/*
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* Copyright © 2010 Behdad Esfahbod
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* Copyright © 2011,2012 Google, Inc.
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*
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* This is part of HarfBuzz, a text shaping library.
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*
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* Permission is hereby granted, without written agreement and without
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* license or royalty fees, to use, copy, modify, and distribute this
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* software and its documentation for any purpose, provided that the
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* above copyright notice and the following two paragraphs appear in
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* all copies of this software.
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*
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* IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
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* DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
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* ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
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* IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
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* DAMAGE.
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*
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* THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
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* BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
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* FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
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* ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
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* PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
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*
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* Google Author(s): Garret Rieger, Rod Sheeter
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*/
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#include <stdio.h>
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#include "main-font-text.hh"
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#include "hb-subset.h"
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/*
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* Command line interface to the harfbuzz font subsetter.
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*/
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struct subset_consumer_t
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{
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subset_consumer_t (option_parser_t *parser)
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: failed (false), options (parser), font (nullptr), codepoints (nullptr) {}
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void init (hb_buffer_t *buffer_,
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const font_options_t *font_opts)
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{
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font = hb_font_reference (font_opts->get_font ());
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codepoints = hb_set_create();
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}
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void consume_line (const char *text,
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unsigned int text_len,
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const char *text_before,
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const char *text_after)
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{
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// text appears to be a g_string when set by --unicodes
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// TODO(Q1) are gunichar and hbcodepoint_t interchangeable?
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// TODO(Q1) does this only get called with at least 1 codepoint?
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gchar *c = (gchar *)text;
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do {
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gunichar cp = g_utf8_get_char(c);
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hb_codepoint_t hb_cp = cp; // TODO(Q1) is this safe?
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hb_set_add(codepoints, hb_cp);
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} while ((c = g_utf8_find_next_char(c, text + text_len)) != nullptr);
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}
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hb_bool_t
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write_file (const char *output_file, hb_blob_t *blob) {
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unsigned int data_length;
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const char* data = hb_blob_get_data (blob, &data_length);
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FILE *fp_out = fopen(output_file, "wb");
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if (fp_out == nullptr) {
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fprintf(stderr, "Unable to open output file\n");
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return false;
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}
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int bytes_written = fwrite(data, 1, data_length, fp_out);
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fclose (fp_out);
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if (bytes_written == -1) {
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fprintf(stderr, "Unable to write output file\n");
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return false;
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}
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if ((unsigned int) bytes_written != data_length) {
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fprintf(stderr, "Expected %u bytes written, got %d\n", data_length,
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bytes_written);
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return false;
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}
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return true;
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}
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void finish (const font_options_t *font_opts)
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{
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// TODO(Q1) check for errors from creates and such
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hb_subset_profile_t *subset_profile = hb_subset_profile_create();
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hb_subset_input_t *subset_input = hb_subset_input_create (codepoints);
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hb_face_t *face = hb_font_get_face (font);
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hb_face_t *new_face = hb_subset(face, subset_profile, subset_input);
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hb_blob_t *result = hb_face_reference_blob (new_face);
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failed = !hb_blob_get_length (result);
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if (!failed)
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write_file (options.output_file, result);
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hb_subset_profile_destroy (subset_profile);
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hb_subset_input_destroy (subset_input);
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hb_set_destroy (codepoints);
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hb_blob_destroy (result);
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hb_face_destroy (new_face);
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hb_font_destroy (font);
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}
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public:
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bool failed;
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private:
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output_options_t options;
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hb_font_t *font;
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hb_set_t *codepoints;
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};
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int
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main (int argc, char **argv)
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{
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main_font_text_t<subset_consumer_t, 10, 0> driver;
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return driver.main (argc, argv);
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}
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