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#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include "../util.h"
#include "sfnt.h"
char *default_font_path(void)
{
FILE *fc_pipe = popen("fc-match -f '%{file}'", "r");
if (!fc_pipe) {
return NULL;
}
size_t buf_size = 128;
char *buffer = NULL;
size_t total = 0, read = 0;
do {
total += read;
buf_size *= 2;
buffer = realloc(buffer, buf_size);
if (!buffer) {
return NULL;
}
read = fread(buffer, 1, buf_size - total, fc_pipe);
} while (read == (buf_size - total));
total += read;
buffer[total] = 0;
return buffer;
}
uint8_t *default_font(uint32_t *size_out)
{
char *path = default_font_path();
if (!path) {
goto error;
}
FILE *f = fopen(path, "rb");
free(path);
if (!f) {
goto error;
}
long size = file_size(f);
uint8_t *buffer = malloc(size);
if (size != fread(buffer, 1, size, f)) {
fclose(f);
goto error;
}
fclose(f);
sfnt_container *sfnt = load_sfnt(buffer, size);
if (!sfnt) {
free(buffer);
goto error;
}
return sfnt_flatten(sfnt->tables, size_out);
error:
//TODO: try to find a suitable font in /usr/share/fonts as a fallback
return NULL;
}
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