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Actually call hb_subset

This commit is contained in:
Rod Sheeter 2018-02-04 12:31:24 -08:00
parent 7b01761ade
commit edcd3b80e9
1 changed files with 35 additions and 18 deletions
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53
util/hb-subset.cc
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@ -28,6 +28,7 @@
#include <unistd.h>
#include "main-font-text.hh"
#include "hb-subset.h"
/*
* Command line interface to the harfbuzz font subsetter.
@ -51,28 +52,44 @@ struct subset_consumer_t
{
}
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);
int fd_out = open(output_file, O_CREAT | O_WRONLY, S_IRWXU);
if (fd_out == -1) {
fprintf(stderr, "Unable to open output file");
return false;
}
ssize_t bytes_written = write(fd_out, data, data_length);
if (bytes_written == -1) {
fprintf(stderr, "Unable to write output file\n");
return false;
}
if (bytes_written != data_length) {
fprintf(stderr, "Expected %u bytes written, got %ld\n", data_length,
bytes_written);
return false;
}
return true;
}
void finish (const font_options_t *font_opts)
{
hb_face_t *face = hb_font_get_face (font);
hb_blob_t *result = hb_face_reference_blob (face);
unsigned int data_length;
const char* data = hb_blob_get_data (result, &data_length);
// TODO(Q1) check for errors from creates and such
hb_subset_profile_t *subset_profile = hb_subset_profile_create();
hb_subset_input_t *subset_input = hb_subset_input_create();
hb_face_t *face = hb_font_get_face (font);
hb_subset_face_t *subset_face = hb_subset_face_create(face);
int fd_out = open(options.output_file, O_CREAT | O_WRONLY, S_IRWXU);
if (fd_out != -1) {
ssize_t bytes_written = write(fd_out, data, data_length);
if (bytes_written == -1) {
fprintf(stderr, "Unable to write output file");
failed = true;
} else if (bytes_written != data_length) {
fprintf(stderr, "Wrong number of bytes written");
failed = true;
}
} else {
fprintf(stderr, "Unable to open output file");
failed = true;
}
hb_blob_t *result = nullptr;
failed = !(hb_subset(subset_profile, subset_input, subset_face, &result)
&& write_file(options.output_file, result));
hb_subset_profile_destroy (subset_profile);
hb_subset_input_destroy (subset_input);
hb_subset_face_destroy (subset_face);
hb_blob_destroy (result);
hb_font_destroy (font);
}