hush/console-tools/loadfont.c
Rob Landley d921b2ecc0 Remove bb_ prefixes from xfuncs.c (and a few other places), consolidate
things like xasprintf() into xfuncs.c, remove xprint_file_by_name() (it only
had one user), clean up lots of #includes...  General cleanup pass.  What I've
been doing for the last couple days.

And it conflicts!  I've removed httpd.c from this checkin due to somebody else
touching that file.  It builds for me.  I have to catch a bus.  (Now you know
why I'm looking forward to Mercurial.)
2006-08-03 15:41:12 +00:00

194 lines
4.5 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 "busybox.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 loadnewfont(int fd);
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;
}
static void do_loadfont(int fd, unsigned char *inbuf, int unit, int fontsize)
{
char buf[16384];
int i;
memset(buf, 0, sizeof(buf));
if (unit < 1 || unit > 32)
bb_error_msg_and_die("Bad character size %d", unit);
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(fd, PIO_FONTX, &cfd) == 0)
return; /* success */
bb_perror_msg("PIO_FONTX ioctl error (trying PIO_FONT)");
}
#endif
if (ioctl(fd, PIO_FONT, buf))
bb_perror_msg_and_die("PIO_FONT ioctl error");
}
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;
u_short unicode;
maxct = tailsz; /* more than enough */
up = (struct unipair *) xmalloc(maxct * sizeof(struct unipair));
for (glyph = 0; glyph < fontsize; glyph++) {
while (tailsz >= 2) {
unicode = (((u_short) 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;
if (ioctl(fd, PIO_UNIMAPCLR, &advice)) {
#ifdef ENOIOCTLCMD
if (errno == ENOIOCTLCMD) {
bb_error_msg("It seems this kernel is older than 1.1.92");
bb_error_msg_and_die("No Unicode mapping table loaded.");
} else
#endif
bb_perror_msg_and_die("PIO_UNIMAPCLR");
}
ud.entry_ct = ct;
ud.entries = up;
if (ioctl(fd, PIO_UNIMAP, &ud)) {
bb_perror_msg_and_die("PIO_UNIMAP");
}
}
static void loadnewfont(int fd)
{
int unit;
unsigned char inbuf[32768]; /* primitive */
unsigned int inputlth, offset;
/*
* 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 = fread(inbuf, 1, sizeof(inbuf), stdin);
if (ferror(stdin))
bb_perror_msg_and_die("Error reading input font");
/* use malloc/realloc in case of giant files;
maybe these do not occur: 16kB for the font,
and 16kB for the map leaves 32 unicode values
for each font position */
if (!feof(stdin))
bb_perror_msg_and_die("Font too large");
/* test for psf first */
{
struct psf_header psfhdr;
int fontsize;
int hastable;
unsigned int 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);
}