134 lines
3.8 KiB
C++
134 lines
3.8 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), subset_options (parser), font (nullptr), input (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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input = hb_subset_input_reference (subset_options.input);
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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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// TODO(Q1) does this only get called with at least 1 codepoint?
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hb_set_t *codepoints = hb_subset_input_unicode_set (input);
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if (0 == strcmp (text, "*"))
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{
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hb_face_t *face = hb_font_get_face (font);
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hb_face_collect_unicodes (face, codepoints);
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return;
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}
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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;
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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)));
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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 size;
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const char* data = hb_blob_get_data (blob, &size);
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if (!output_file)
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fail (true, "No output file was specified");
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FILE *fp = fopen(output_file, "wb");
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if (!fp)
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fail (false, "Cannot open output file `%s': %s",
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g_filename_display_name (output_file), strerror (errno));
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while (size) {
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size_t ret = fwrite (data, 1, size, fp);
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size -= ret;
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data += ret;
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if (size && ferror (fp))
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fail (false, "Failed to write output: %s", strerror (errno));
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}
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fclose (fp);
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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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hb_face_t *face = hb_font_get_face (font);
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hb_face_t *new_face = nullptr;
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for (unsigned i = 0; i < subset_options.num_iterations; i++) {
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hb_face_destroy (new_face);
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new_face = hb_subset (face, input);
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}
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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_input_destroy (input);
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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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subset_options_t subset_options;
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hb_font_t *font;
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hb_subset_input_t *input;
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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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