hush/console-tools/loadfont.c
Denis Vlasenko fb79a2e2cf xioctl and friends by Tito <farmatito@tiscali.it>
function                                             old     new   delta
do_iptunnel                                          203     977    +774
process_dev                                         5328    5494    +166
ioctl_or_perror                                        -      54     +54
ioctl_or_perror_and_die                                -      51     +51
ioctl_alt_func                                         -      49     +49
bb_ioctl_or_warn                                       -      47     +47
do_add_ioctl                                         102     145     +43
bb_xioctl                                              -      39     +39
print_value_on_off                                     -      31     +31
get_lcm                                              105     123     +18
arp_main                                            2155    2167     +12
..................
zcip_main                                           1576    1566     -10
setlogcons_main                                       92      82     -10
dumpkmap_main                                        263     253     -10
do_get_ioctl                                          85      75     -10
setkeycodes_main                                     165     154     -11
write_table                                          244     232     -12
vconfig_main                                         318     306     -12
do_del_ioctl                                          93      81     -12
set_address                                           75      62     -13
maybe_set_utc                                         30      16     -14
loadfont_main                                        495     479     -16
slattach_main                                        712     695     -17
do_loadfont                                          191     174     -17
do_iplink                                           1155    1136     -19
getty_main                                          2583    2562     -21
fbset_main                                          2058    2035     -23
do_time                                              588     565     -23
xioctl                                                25       -     -25
read_rtc                                             186     160     -26
parse_conf                                          1299    1270     -29
udhcp_read_interface                                 269     239     -30
bb_ioctl                                              45       -     -45
bb_ioctl_alt                                          70       -     -70
bb_ioctl_on_off                                       78       -     -78
.rodata                                           129370  129018    -352
do_show                                              799       -    -799
------------------------------------------------------------------------------
(add/remove: 6/5 grow/shrink: 13/49 up/down: 1316/-1864)     Total: -548 bytes
   text	   data	    bss	    dec	    hex	filename
 675352	   2740	  13968	 692060	  a8f5c	busybox_old
 674804	   2740	  13968	 691512	  a8d38	busybox_unstripped
2007-07-14 22:07:14 +00:00

182 lines
4.1 KiB
C

/* vi: set sw=4 ts=4: */
/*
* loadfont.c - Eugene Crosser & Andries Brouwer
*
* Version 0.96bb
*
* Loads the console font, and possibly the corresponding screen map(s).
* (Adapted for busybox by Matej Vela.)
*/
#include "libbb.h"
#include <sys/kd.h>
enum {
PSF_MAGIC1 = 0x36,
PSF_MAGIC2 = 0x04,
PSF_MODE512 = 0x01,
PSF_MODEHASTAB = 0x02,
PSF_MAXMODE = 0x03,
PSF_SEPARATOR = 0xFFFF
};
struct psf_header {
unsigned char magic1, magic2; /* Magic number */
unsigned char mode; /* PSF font mode */
unsigned char charsize; /* Character size */
};
#define PSF_MAGIC_OK(x) ((x).magic1 == PSF_MAGIC1 && (x).magic2 == PSF_MAGIC2)
static void do_loadfont(int fd, unsigned char *inbuf, int unit, int fontsize)
{
char *buf;
int i;
if (unit < 1 || unit > 32)
bb_error_msg_and_die("bad character size %d", unit);
buf = xzalloc(16 * 1024);
/*memset(buf, 0, 16 * 1024);*/
for (i = 0; i < fontsize; i++)
memcpy(buf + (32 * i), inbuf + (unit * i), unit);
#if defined(PIO_FONTX) && !defined(__sparc__)
{
struct consolefontdesc cfd;
cfd.charcount = fontsize;
cfd.charheight = unit;
cfd.chardata = buf;
if (!ioctl_or_perror(fd, PIO_FONTX, &cfd, "PIO_FONTX ioctl failed (will try PIO_FONT)"))
goto ret; /* success */
}
#endif
xioctl(fd, PIO_FONT, buf);
ret:
free(buf);
}
static void
do_loadtable(int fd, unsigned char *inbuf, int tailsz, int fontsize)
{
struct unimapinit advice;
struct unimapdesc ud;
struct unipair *up;
int ct = 0, maxct;
int glyph;
uint16_t unicode;
maxct = tailsz; /* more than enough */
up = xmalloc(maxct * sizeof(struct unipair));
for (glyph = 0; glyph < fontsize; glyph++) {
while (tailsz >= 2) {
unicode = (((uint16_t) inbuf[1]) << 8) + inbuf[0];
tailsz -= 2;
inbuf += 2;
if (unicode == PSF_SEPARATOR)
break;
up[ct].unicode = unicode;
up[ct].fontpos = glyph;
ct++;
}
}
/* Note: after PIO_UNIMAPCLR and before PIO_UNIMAP
this printf did not work on many kernels */
advice.advised_hashsize = 0;
advice.advised_hashstep = 0;
advice.advised_hashlevel = 0;
xioctl(fd, PIO_UNIMAPCLR, &advice);
ud.entry_ct = ct;
ud.entries = up;
xioctl(fd, PIO_UNIMAP, &ud);
}
static void loadnewfont(int fd)
{
enum { INBUF_SIZE = 32*1024 + 1 };
int unit;
unsigned inputlth, offset;
/* Was on stack, but 32k is a bit too much: */
unsigned char *inbuf = xmalloc(INBUF_SIZE);
/*
* We used to look at the length of the input file
* with stat(); now that we accept compressed files,
* just read the entire file.
*/
inputlth = full_read(STDIN_FILENO, inbuf, INBUF_SIZE);
if (inputlth < 0)
bb_perror_msg_and_die("error reading input font");
if (inputlth >= INBUF_SIZE)
bb_error_msg_and_die("font too large");
/* test for psf first */
{
struct psf_header psfhdr;
int fontsize;
int hastable;
unsigned head0, head;
if (inputlth < sizeof(struct psf_header))
goto no_psf;
psfhdr = *(struct psf_header *) &inbuf[0];
if (!PSF_MAGIC_OK(psfhdr))
goto no_psf;
if (psfhdr.mode > PSF_MAXMODE)
bb_error_msg_and_die("unsupported psf file mode");
fontsize = ((psfhdr.mode & PSF_MODE512) ? 512 : 256);
#if !defined(PIO_FONTX) || defined(__sparc__)
if (fontsize != 256)
bb_error_msg_and_die("only fontsize 256 supported");
#endif
hastable = (psfhdr.mode & PSF_MODEHASTAB);
unit = psfhdr.charsize;
head0 = sizeof(struct psf_header);
head = head0 + fontsize * unit;
if (head > inputlth || (!hastable && head != inputlth))
bb_error_msg_and_die("input file: bad length");
do_loadfont(fd, inbuf + head0, unit, fontsize);
if (hastable)
do_loadtable(fd, inbuf + head, inputlth - head, fontsize);
return;
}
no_psf:
/* file with three code pages? */
if (inputlth == 9780) {
offset = 40;
unit = 16;
} else {
/* bare font */
if (inputlth & 0377)
bb_error_msg_and_die("bad input file size");
offset = 0;
unit = inputlth / 256;
}
do_loadfont(fd, inbuf + offset, unit, 256);
}
int loadfont_main(int argc, char **argv);
int loadfont_main(int argc, char **argv)
{
int fd;
if (argc != 1)
bb_show_usage();
fd = xopen(CURRENT_VC, O_RDWR);
loadnewfont(fd);
return EXIT_SUCCESS;
}