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