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473 lines
12 KiB
C
473 lines
12 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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* Licensed under GPLv2, see file LICENSE in this source tree.
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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, 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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PSF1_MAGIC0 = 0x36,
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PSF1_MAGIC1 = 0x04,
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PSF1_MODE512 = 0x01,
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PSF1_MODEHASTAB = 0x02,
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PSF1_MODEHASSEQ = 0x04,
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PSF1_MAXMODE = 0x05,
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PSF1_STARTSEQ = 0xfffe,
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PSF1_SEPARATOR = 0xffff,
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};
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struct psf1_header {
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unsigned char magic[2]; /* 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 psf1h(x) ((struct psf1_header*)(x))
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#define PSF1_MAGIC_OK(x) ( \
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(x)->magic[0] == PSF1_MAGIC0 \
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&& (x)->magic[1] == PSF1_MAGIC1 \
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)
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#if ENABLE_FEATURE_LOADFONT_PSF2
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enum {
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PSF2_MAGIC0 = 0x72,
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PSF2_MAGIC1 = 0xb5,
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PSF2_MAGIC2 = 0x4a,
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PSF2_MAGIC3 = 0x86,
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PSF2_HAS_UNICODE_TABLE = 0x01,
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PSF2_MAXVERSION = 0,
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PSF2_STARTSEQ = 0xfe,
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PSF2_SEPARATOR = 0xff
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};
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struct psf2_header {
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unsigned char magic[4];
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unsigned int version;
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unsigned int headersize; /* offset of bitmaps in file */
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unsigned int flags;
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unsigned int length; /* number of glyphs */
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unsigned int charsize; /* number of bytes for each character */
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unsigned int height; /* max dimensions of glyphs */
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unsigned int width; /* charsize = height * ((width + 7) / 8) */
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};
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#define psf2h(x) ((struct psf2_header*)(x))
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#define PSF2_MAGIC_OK(x) ( \
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(x)->magic[0] == PSF2_MAGIC0 \
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&& (x)->magic[1] == PSF2_MAGIC1 \
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&& (x)->magic[2] == PSF2_MAGIC2 \
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&& (x)->magic[3] == PSF2_MAGIC3 \
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)
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#endif /* ENABLE_FEATURE_LOADFONT_PSF2 */
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static void do_loadfont(int fd, unsigned char *inbuf, int height, int width, int charsize, int fontsize)
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{
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unsigned char *buf;
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int charwidth = 32 * ((width+7)/8);
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int i;
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if (height < 1 || height > 32 || width < 1 || width > 32)
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bb_error_msg_and_die("bad character size %dx%d", height, width);
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buf = xzalloc(charwidth * ((fontsize < 128) ? 128 : fontsize));
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for (i = 0; i < fontsize; i++)
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memcpy(buf + (i*charwidth), inbuf + (i*charsize), charsize);
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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 = width;
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cfo.height = height;
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cfo.charcount = fontsize;
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cfo.data = buf;
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xioctl(fd, KDFONTOP, &cfo);
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}
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free(buf);
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}
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/*
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* Format of the Unicode information:
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*
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* For each font position <uc>*<seq>*<term>
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* where <uc> is a 2-byte little endian Unicode value (PSF1)
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* or an UTF-8 coded value (PSF2),
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* <seq> = <ss><uc><uc>*, <ss> = psf1 ? 0xFFFE : 0xFE,
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* <term> = psf1 ? 0xFFFF : 0xFF.
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* and * denotes zero or more occurrences of the preceding item.
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*
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* Semantics:
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* The leading <uc>* part gives Unicode symbols that are all
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* represented by this font position. The following sequences
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* are sequences of Unicode symbols - probably a symbol
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* together with combining accents - also represented by
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* this font position.
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*
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* Example:
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* At the font position for a capital A-ring glyph, we
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* may have:
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* 00C5,212B,FFFE,0041,030A,FFFF
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* Some font positions may be described by sequences only,
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* namely when there is no precomposed Unicode value for the glyph.
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*/
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#if !ENABLE_FEATURE_LOADFONT_PSF2
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#define do_loadtable(fd, inbuf, tailsz, fontsize, psf2) \
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do_loadtable(fd, inbuf, tailsz, fontsize)
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#endif
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static void do_loadtable(int fd, unsigned char *inbuf, int tailsz, int fontsize, int psf2)
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{
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#if !ENABLE_FEATURE_LOADFONT_PSF2
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/* gcc 4.3.1 code size: */
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# define psf2 0 /* +0 bytes */
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// const int psf2 = 0; /* +8 bytes */
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// enum { psf2 = 0 }; /* +13 bytes */
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#endif
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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(*up));
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for (glyph = 0; glyph < fontsize; glyph++) {
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while (tailsz > 0) {
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if (!psf2) { /* PSF1 */
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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 == PSF1_SEPARATOR)
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break;
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} else { /* PSF2 */
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#if ENABLE_FEATURE_LOADFONT_PSF2
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--tailsz;
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unicode = *inbuf++;
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if (unicode == PSF2_SEPARATOR) {
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break;
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} else if (unicode == PSF2_STARTSEQ) {
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bb_error_msg_and_die("unicode sequences not implemented");
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} else if (unicode >= 0xC0) {
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if (unicode >= 0xFC)
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unicode &= 0x01, maxct = 5;
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else if (unicode >= 0xF8)
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unicode &= 0x03, maxct = 4;
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else if (unicode >= 0xF0)
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unicode &= 0x07, maxct = 3;
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else if (unicode >= 0xE0)
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unicode &= 0x0F, maxct = 2;
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else
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unicode &= 0x1F, maxct = 1;
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do {
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if (tailsz <= 0 || *inbuf < 0x80 || *inbuf > 0xBF)
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bb_error_msg_and_die("illegal UTF-8 character");
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--tailsz;
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unicode = (unicode << 6) + (*inbuf++ & 0x3F);
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} while (--maxct > 0);
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} else if (unicode >= 0x80) {
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bb_error_msg_and_die("illegal UTF-8 character");
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}
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#else
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return;
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#endif
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}
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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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#undef psf2
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}
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static void do_load(int fd, unsigned char *buffer, size_t len)
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{
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int height;
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int width = 8;
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int charsize;
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int fontsize = 256;
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int has_table = 0;
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unsigned char *font = buffer;
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unsigned char *table;
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if (len >= sizeof(struct psf1_header) && PSF1_MAGIC_OK(psf1h(buffer))) {
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if (psf1h(buffer)->mode > PSF1_MAXMODE)
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bb_error_msg_and_die("unsupported psf file mode");
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if (psf1h(buffer)->mode & PSF1_MODE512)
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fontsize = 512;
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if (psf1h(buffer)->mode & PSF1_MODEHASTAB)
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has_table = 1;
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height = charsize = psf1h(buffer)->charsize;
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font += sizeof(struct psf1_header);
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} else
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#if ENABLE_FEATURE_LOADFONT_PSF2
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if (len >= sizeof(struct psf2_header) && PSF2_MAGIC_OK(psf2h(buffer))) {
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if (psf2h(buffer)->version > PSF2_MAXVERSION)
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bb_error_msg_and_die("unsupported psf file version");
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fontsize = psf2h(buffer)->length;
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if (psf2h(buffer)->flags & PSF2_HAS_UNICODE_TABLE)
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has_table = 2;
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charsize = psf2h(buffer)->charsize;
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height = psf2h(buffer)->height;
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width = psf2h(buffer)->width;
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font += psf2h(buffer)->headersize;
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} else
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#endif
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#if ENABLE_FEATURE_LOADFONT_RAW
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if (len == 9780) { /* file with three code pages? */
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charsize = height = 16;
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font += 40;
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} else if ((len & 0377) == 0) { /* bare font */
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charsize = height = len / 256;
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} else
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#endif
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{
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bb_error_msg_and_die("input file: bad length or unsupported font type");
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}
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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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table = font + fontsize * charsize;
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buffer += len;
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if (table > buffer || (!has_table && table != buffer))
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bb_error_msg_and_die("input file: bad length");
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do_loadfont(fd, font, height, width, charsize, fontsize);
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if (has_table)
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do_loadtable(fd, table, buffer - table, fontsize, has_table - 1);
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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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unsigned char *buffer;
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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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buffer = xmalloc_read(STDIN_FILENO, &len);
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// xmalloc_open_zipped_read_close(filename, &len);
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if (!buffer)
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bb_perror_msg_and_die("error reading input font");
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do_load(get_console_fd_or_die(), buffer, 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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unsigned char *buffer;
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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_nonblocking(tty_name);
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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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buffer = xmalloc_open_zipped_read_close(*argv, &len);
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if (!buffer)
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bb_simple_perror_msg_and_die(*argv);
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do_load(fd, buffer, 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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