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369 lines
9.0 KiB
C
369 lines
9.0 KiB
C
/* vi: set sw=4 ts=4: */
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/*
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* loadfont.c - Eugene Crosser & Andries Brouwer
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*
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* Version 0.96bb
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*
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* Loads the console font, and possibly the corresponding screen map(s).
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* (Adapted for busybox by Matej Vela.)
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*/
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#include "libbb.h"
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#include <sys/kd.h>
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#ifndef KDFONTOP
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#define KDFONTOP 0x4B72
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struct console_font_op {
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unsigned op; /* KD_FONT_OP_* */
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unsigned flags; /* KD_FONT_FLAG_* */
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unsigned width, height;
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unsigned charcount;
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unsigned char *data; /* font data with height fixed to 32 */
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};
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#define KD_FONT_OP_SET 0 /* Set font */
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#define KD_FONT_OP_GET 1 /* Get font */
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#define KD_FONT_OP_SET_DEFAULT 2 /* Set font to default,
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data points to name / NULL */
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#define KD_FONT_OP_COPY 3 /* Copy from another console */
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#define KD_FONT_FLAG_OLD 0x80000000 /* Invoked via old interface */
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#define KD_FONT_FLAG_DONT_RECALC 1 /* Don't call adjust_height() */
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/* (Used internally for PIO_FONT support) */
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#endif /* KDFONTOP */
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enum {
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PSF_MAGIC1 = 0x36,
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PSF_MAGIC2 = 0x04,
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PSF_MODE512 = 0x01,
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PSF_MODEHASTAB = 0x02,
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PSF_MAXMODE = 0x03,
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PSF_SEPARATOR = 0xffff
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};
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struct psf_header {
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unsigned char magic1, magic2; /* Magic number */
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unsigned char mode; /* PSF font mode */
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unsigned char charsize; /* Character size */
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};
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#define PSF_MAGIC_OK(x) ((x)->magic1 == PSF_MAGIC1 && (x)->magic2 == PSF_MAGIC2)
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static void do_loadfont(int fd, unsigned char *inbuf, int unit, int fontsize)
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{
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char *buf;
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int i;
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if (unit < 1 || unit > 32)
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bb_error_msg_and_die("bad character size %d", unit);
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buf = xzalloc(16 * 1024);
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for (i = 0; i < fontsize; i++)
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memcpy(buf + (32 * i), inbuf + (unit * i), unit);
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{ /* KDFONTOP */
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struct console_font_op cfo;
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cfo.op = KD_FONT_OP_SET;
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cfo.flags = 0;
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cfo.width = 8;
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cfo.height = unit;
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cfo.charcount = fontsize;
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cfo.data = (void*)buf;
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#if 0
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if (!ioctl_or_perror(fd, KDFONTOP, &cfo, "KDFONTOP ioctl failed (will try PIO_FONTX)"))
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goto ret; /* success */
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#else
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xioctl(fd, KDFONTOP, &cfo);
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#endif
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}
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#if 0
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/* These ones do not honour -C tty (they set font on current tty regardless) */
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#if defined(PIO_FONTX) && !defined(__sparc__)
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{
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struct consolefontdesc cfd;
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cfd.charcount = fontsize;
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cfd.charheight = unit;
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cfd.chardata = buf;
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if (!ioctl_or_perror(fd, PIO_FONTX, &cfd, "PIO_FONTX ioctl failed (will try PIO_FONT)"))
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goto ret; /* success */
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}
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#endif
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xioctl(fd, PIO_FONT, buf);
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ret:
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#endif /* 0 */
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free(buf);
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}
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static void do_loadtable(int fd, unsigned char *inbuf, int tailsz, int fontsize)
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{
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struct unimapinit advice;
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struct unimapdesc ud;
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struct unipair *up;
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int ct = 0, maxct;
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int glyph;
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uint16_t unicode;
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maxct = tailsz; /* more than enough */
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up = xmalloc(maxct * sizeof(struct unipair));
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for (glyph = 0; glyph < fontsize; glyph++) {
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while (tailsz >= 2) {
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unicode = (((uint16_t) inbuf[1]) << 8) + inbuf[0];
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tailsz -= 2;
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inbuf += 2;
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if (unicode == PSF_SEPARATOR)
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break;
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up[ct].unicode = unicode;
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up[ct].fontpos = glyph;
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ct++;
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}
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}
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/* Note: after PIO_UNIMAPCLR and before PIO_UNIMAP
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this printf did not work on many kernels */
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advice.advised_hashsize = 0;
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advice.advised_hashstep = 0;
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advice.advised_hashlevel = 0;
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xioctl(fd, PIO_UNIMAPCLR, &advice);
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ud.entry_ct = ct;
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ud.entries = up;
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xioctl(fd, PIO_UNIMAP, &ud);
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}
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static void do_load(int fd, struct psf_header *psfhdr, size_t len)
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{
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int unit;
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int fontsize;
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int hastable;
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unsigned head0, head = head;
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/* test for psf first */
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if (len >= sizeof(struct psf_header) && PSF_MAGIC_OK(psfhdr)) {
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if (psfhdr->mode > PSF_MAXMODE)
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bb_error_msg_and_die("unsupported psf file mode");
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fontsize = ((psfhdr->mode & PSF_MODE512) ? 512 : 256);
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#if !defined(PIO_FONTX) || defined(__sparc__)
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if (fontsize != 256)
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bb_error_msg_and_die("only fontsize 256 supported");
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#endif
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hastable = (psfhdr->mode & PSF_MODEHASTAB);
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unit = psfhdr->charsize;
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head0 = sizeof(struct psf_header);
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head = head0 + fontsize * unit;
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if (head > len || (!hastable && head != len))
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bb_error_msg_and_die("input file: bad length");
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} else {
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/* file with three code pages? */
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if (len == 9780) {
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head0 = 40;
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unit = 16;
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} else {
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/* bare font */
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if (len & 0377)
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bb_error_msg_and_die("input file: bad length");
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head0 = 0;
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unit = len / 256;
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}
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fontsize = 256;
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hastable = 0;
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}
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do_loadfont(fd, (unsigned char *)psfhdr + head0, unit, fontsize);
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if (hastable)
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do_loadtable(fd, (unsigned char *)psfhdr + head, len - head, fontsize);
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}
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#if ENABLE_LOADFONT
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int loadfont_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
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int loadfont_main(int argc UNUSED_PARAM, char **argv)
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{
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size_t len;
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struct psf_header *psfhdr;
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// no arguments allowed!
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opt_complementary = "=0";
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getopt32(argv, "");
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/*
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* We used to look at the length of the input file
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* with stat(); now that we accept compressed files,
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* just read the entire file.
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*/
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len = 32*1024; // can't be larger
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psfhdr = (struct psf_header *) xmalloc_read(STDIN_FILENO, &len);
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// xmalloc_open_zipped_read_close(filename, &len);
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if (!psfhdr)
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bb_perror_msg_and_die("error reading input font");
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do_load(get_console_fd_or_die(), psfhdr, len);
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return EXIT_SUCCESS;
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}
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#endif
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#if ENABLE_SETFONT
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/*
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kbd-1.12:
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setfont [-O font+umap.orig] [-o font.orig] [-om cmap.orig]
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[-ou umap.orig] [-N] [font.new ...] [-m cmap] [-u umap] [-C console]
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[-hNN] [-v] [-V]
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-h NN Override font height
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-o file
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Save previous font in file
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-O file
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Save previous font and Unicode map in file
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-om file
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Store console map in file
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-ou file
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Save previous Unicode map in file
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-m file
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Load console map or Unicode console map from file
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-u file
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Load Unicode table describing the font from file
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Example:
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# cp866
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0x00-0x7f idem
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#
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0x80 U+0410 # CYRILLIC CAPITAL LETTER A
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0x81 U+0411 # CYRILLIC CAPITAL LETTER BE
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0x82 U+0412 # CYRILLIC CAPITAL LETTER VE
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-C console
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Set the font for the indicated console
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-v Verbose
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-V Version
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*/
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#if ENABLE_FEATURE_SETFONT_TEXTUAL_MAP
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static int ctoi(char *s)
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{
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if (s[0] == '\'' && s[1] != '\0' && s[2] == '\'' && s[3] == '\0')
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return s[1];
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// U+ means 0x
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if (s[0] == 'U' && s[1] == '+') {
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s[0] = '0';
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s[1] = 'x';
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}
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if (!isdigit(s[0]))
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return -1;
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return xstrtoul(s, 0);
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}
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#endif
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int setfont_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
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int setfont_main(int argc UNUSED_PARAM, char **argv)
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{
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size_t len;
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unsigned opts;
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int fd;
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struct psf_header *psfhdr;
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char *mapfilename;
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const char *tty_name = CURRENT_TTY;
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opt_complementary = "=1";
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opts = getopt32(argv, "m:C:", &mapfilename, &tty_name);
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argv += optind;
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fd = xopen(tty_name, O_NONBLOCK);
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if (sizeof(CONFIG_DEFAULT_SETFONT_DIR) > 1) { // if not ""
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if (*argv[0] != '/') {
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// goto default fonts location. don't die if doesn't exist
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chdir(CONFIG_DEFAULT_SETFONT_DIR "/consolefonts");
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}
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}
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// load font
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len = 32*1024; // can't be larger
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psfhdr = (struct psf_header *) xmalloc_open_zipped_read_close(*argv, &len);
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if (!psfhdr)
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bb_simple_perror_msg_and_die(*argv);
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do_load(fd, psfhdr, len);
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// load the screen map, if any
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if (opts & 1) { // -m
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unsigned mode = PIO_SCRNMAP;
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void *map;
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if (sizeof(CONFIG_DEFAULT_SETFONT_DIR) > 1) { // if not ""
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if (mapfilename[0] != '/') {
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// goto default keymaps location
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chdir(CONFIG_DEFAULT_SETFONT_DIR "/consoletrans");
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}
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}
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// fetch keymap
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map = xmalloc_open_zipped_read_close(mapfilename, &len);
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if (!map)
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bb_simple_perror_msg_and_die(mapfilename);
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// file size is 256 or 512 bytes? -> assume binary map
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if (len == E_TABSZ || len == 2*E_TABSZ) {
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if (len == 2*E_TABSZ)
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mode = PIO_UNISCRNMAP;
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}
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#if ENABLE_FEATURE_SETFONT_TEXTUAL_MAP
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// assume textual Unicode console maps:
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// 0x00 U+0000 # NULL (NUL)
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// 0x01 U+0001 # START OF HEADING (SOH)
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// 0x02 U+0002 # START OF TEXT (STX)
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// 0x03 U+0003 # END OF TEXT (ETX)
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else {
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int i;
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char *token[2];
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parser_t *parser;
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if (ENABLE_FEATURE_CLEAN_UP)
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free(map);
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map = xmalloc(E_TABSZ * sizeof(unsigned short));
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#define unicodes ((unsigned short *)map)
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// fill vanilla map
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for (i = 0; i < E_TABSZ; i++)
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unicodes[i] = 0xf000 + i;
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parser = config_open(mapfilename);
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while (config_read(parser, token, 2, 2, "# \t", PARSE_NORMAL | PARSE_MIN_DIE)) {
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// parse code/value pair
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int a = ctoi(token[0]);
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int b = ctoi(token[1]);
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if (a < 0 || a >= E_TABSZ
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|| b < 0 || b > 65535
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) {
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bb_error_msg_and_die("map format");
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}
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// patch map
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unicodes[a] = b;
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// unicode character is met?
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if (b > 255)
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mode = PIO_UNISCRNMAP;
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}
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if (ENABLE_FEATURE_CLEAN_UP)
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config_close(parser);
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if (mode != PIO_UNISCRNMAP) {
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#define asciis ((unsigned char *)map)
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for (i = 0; i < E_TABSZ; i++)
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asciis[i] = unicodes[i];
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#undef asciis
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}
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#undef unicodes
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}
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#endif // ENABLE_FEATURE_SETFONT_TEXTUAL_MAP
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// do set screen map
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xioctl(fd, mode, map);
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if (ENABLE_FEATURE_CLEAN_UP)
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free(map);
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}
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return EXIT_SUCCESS;
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}
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#endif
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