123 lines
1.9 KiB
C
123 lines
1.9 KiB
C
/* loadfont.c - Load custom font into EGA, VGA video card
|
|
*
|
|
* Author: Hrvoje Stipetic (hs@hck.hr) Jun-1995.
|
|
*
|
|
*/
|
|
|
|
#include <sys/types.h>
|
|
#include <fcntl.h>
|
|
#include <unistd.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <errno.h>
|
|
#include <termios.h>
|
|
#include <sys/ioctl.h>
|
|
|
|
void tell(char *s)
|
|
{
|
|
write(2, s, strlen(s));
|
|
}
|
|
|
|
char *itoa(unsigned i)
|
|
{
|
|
static char a[3*sizeof(int)];
|
|
char *p = a+sizeof(a)-1;
|
|
|
|
do {
|
|
*--p = '0' + i%10;
|
|
} while ((i /= 10) > 0);
|
|
|
|
return p;
|
|
}
|
|
|
|
void report(char *say)
|
|
{
|
|
int err = errno;
|
|
tell("loadfont: ");
|
|
if (say != NULL) {
|
|
tell(say);
|
|
tell(": ");
|
|
}
|
|
tell(strerror(err));
|
|
tell("\n");
|
|
}
|
|
|
|
void usage(void)
|
|
{
|
|
tell("Usage: loadfont fontfile\n");
|
|
exit(1);
|
|
}
|
|
|
|
|
|
int main(int argc, char *argv[])
|
|
{
|
|
static u8_t font[256][32];
|
|
static u8_t font_file[256 * (16+14+8) + 1];
|
|
u8_t *ff;
|
|
int fd, size, tsize, ch, ln;
|
|
struct winsize ws;
|
|
|
|
|
|
if (argc != 2)
|
|
usage();
|
|
|
|
if ((fd = open(argv[1], O_RDONLY)) < 0) {
|
|
report(argv[1]);
|
|
exit(1);
|
|
}
|
|
|
|
switch (read(fd, font_file, sizeof(font_file))) {
|
|
case 256 * 8:
|
|
size = 8;
|
|
break;
|
|
case 256 * 14:
|
|
size = 14;
|
|
break;
|
|
case 256 * 16:
|
|
size = 16;
|
|
break;
|
|
case 256 * (16+14+8):
|
|
size = 0;
|
|
break;
|
|
case -1:
|
|
report(argv[1]);
|
|
exit(1);
|
|
default:
|
|
tell("loadfont: ");
|
|
tell(argv[1]);
|
|
tell(": fontfile is not an 8x8, 8x14, 8x16, or compound font\n");
|
|
exit(1);
|
|
}
|
|
close(fd);
|
|
|
|
if (ioctl(0, TIOCGWINSZ, &ws) < 0 || (errno= ENOTTY, ws.ws_row == 0)) {
|
|
report(NULL);
|
|
exit(1);
|
|
}
|
|
tsize = ws.ws_ypixel / ws.ws_row;
|
|
|
|
if (size == 0) {
|
|
if (tsize >= 16) {
|
|
ff = font_file + 256 * (0);
|
|
} else
|
|
if (tsize >= 14) {
|
|
ff = font_file + 256 * (16);
|
|
} else {
|
|
ff = font_file + 256 * (16 + 14);
|
|
}
|
|
size = tsize;
|
|
} else {
|
|
ff = font_file;
|
|
}
|
|
|
|
for (ch = 0; ch < 256; ch++) {
|
|
for (ln = 0; ln < size; ln++) font[ch][ln] = ff[ch * size + ln];
|
|
}
|
|
|
|
if (ioctl(0, TIOCSFON, font) < 0) {
|
|
report(NULL);
|
|
exit(1);
|
|
}
|
|
exit(0);
|
|
}
|