source: MondoRescue/branches/3.0/mindi-busybox/console-tools/loadfont.c

Last change on this file was 2725, checked in by Bruno Cornec, 13 years ago
  • Update mindi-busybox to 1.18.3 to avoid problems with the tar command which is now failing on recent versions with busybox 1.7.3
File size: 12.3 KB
Line 
1/* vi: set sw=4 ts=4: */
2/*
3 * loadfont.c - Eugene Crosser & Andries Brouwer
4 *
5 * Version 0.96bb
6 *
7 * Loads the console font, and possibly the corresponding screen map(s).
8 * (Adapted for busybox by Matej Vela.)
9 *
10 * Licensed under GPLv2, see file LICENSE in this source tree.
11 */
12#include "libbb.h"
13#include <sys/kd.h>
14
15#ifndef KDFONTOP
16# define KDFONTOP 0x4B72
17struct console_font_op {
18 unsigned op; /* KD_FONT_OP_* */
19 unsigned flags; /* KD_FONT_FLAG_* */
20 unsigned width, height;
21 unsigned charcount;
22 unsigned char *data; /* font data with height fixed to 32 */
23};
24# define KD_FONT_OP_SET 0 /* Set font */
25# define KD_FONT_OP_GET 1 /* Get font */
26# define KD_FONT_OP_SET_DEFAULT 2 /* Set font to default, data points to name / NULL */
27# define KD_FONT_OP_COPY 3 /* Copy from another console */
28# define KD_FONT_FLAG_OLD 0x80000000 /* Invoked via old interface */
29# define KD_FONT_FLAG_DONT_RECALC 1 /* Don't call adjust_height() */
30 /* (Used internally for PIO_FONT support) */
31#endif /* KDFONTOP */
32
33
34enum {
35 PSF1_MAGIC0 = 0x36,
36 PSF1_MAGIC1 = 0x04,
37 PSF1_MODE512 = 0x01,
38 PSF1_MODEHASTAB = 0x02,
39 PSF1_MODEHASSEQ = 0x04,
40 PSF1_MAXMODE = 0x05,
41 PSF1_STARTSEQ = 0xfffe,
42 PSF1_SEPARATOR = 0xffff,
43};
44
45struct psf1_header {
46 unsigned char magic[2]; /* Magic number */
47 unsigned char mode; /* PSF font mode */
48 unsigned char charsize; /* Character size */
49};
50
51#define psf1h(x) ((struct psf1_header*)(x))
52
53#define PSF1_MAGIC_OK(x) ( \
54 (x)->magic[0] == PSF1_MAGIC0 \
55 && (x)->magic[1] == PSF1_MAGIC1 \
56)
57
58#if ENABLE_FEATURE_LOADFONT_PSF2
59enum {
60 PSF2_MAGIC0 = 0x72,
61 PSF2_MAGIC1 = 0xb5,
62 PSF2_MAGIC2 = 0x4a,
63 PSF2_MAGIC3 = 0x86,
64 PSF2_HAS_UNICODE_TABLE = 0x01,
65 PSF2_MAXVERSION = 0,
66 PSF2_STARTSEQ = 0xfe,
67 PSF2_SEPARATOR = 0xff
68};
69
70struct psf2_header {
71 unsigned char magic[4];
72 unsigned int version;
73 unsigned int headersize; /* offset of bitmaps in file */
74 unsigned int flags;
75 unsigned int length; /* number of glyphs */
76 unsigned int charsize; /* number of bytes for each character */
77 unsigned int height; /* max dimensions of glyphs */
78 unsigned int width; /* charsize = height * ((width + 7) / 8) */
79};
80
81#define psf2h(x) ((struct psf2_header*)(x))
82
83#define PSF2_MAGIC_OK(x) ( \
84 (x)->magic[0] == PSF2_MAGIC0 \
85 && (x)->magic[1] == PSF2_MAGIC1 \
86 && (x)->magic[2] == PSF2_MAGIC2 \
87 && (x)->magic[3] == PSF2_MAGIC3 \
88)
89#endif /* ENABLE_FEATURE_LOADFONT_PSF2 */
90
91
92static void do_loadfont(int fd, unsigned char *inbuf, int height, int width, int charsize, int fontsize)
93{
94 unsigned char *buf;
95 int charwidth = 32 * ((width+7)/8);
96 int i;
97
98 if (height < 1 || height > 32 || width < 1 || width > 32)
99 bb_error_msg_and_die("bad character size %dx%d", height, width);
100
101 buf = xzalloc(charwidth * ((fontsize < 128) ? 128 : fontsize));
102 for (i = 0; i < fontsize; i++)
103 memcpy(buf + (i*charwidth), inbuf + (i*charsize), charsize);
104
105 { /* KDFONTOP */
106 struct console_font_op cfo;
107 cfo.op = KD_FONT_OP_SET;
108 cfo.flags = 0;
109 cfo.width = width;
110 cfo.height = height;
111 cfo.charcount = fontsize;
112 cfo.data = buf;
113 xioctl(fd, KDFONTOP, &cfo);
114 }
115
116 free(buf);
117}
118
119/*
120 * Format of the Unicode information:
121 *
122 * For each font position <uc>*<seq>*<term>
123 * where <uc> is a 2-byte little endian Unicode value (PSF1)
124 * or an UTF-8 coded value (PSF2),
125 * <seq> = <ss><uc><uc>*, <ss> = psf1 ? 0xFFFE : 0xFE,
126 * <term> = psf1 ? 0xFFFF : 0xFF.
127 * and * denotes zero or more occurrences of the preceding item.
128 *
129 * Semantics:
130 * The leading <uc>* part gives Unicode symbols that are all
131 * represented by this font position. The following sequences
132 * are sequences of Unicode symbols - probably a symbol
133 * together with combining accents - also represented by
134 * this font position.
135 *
136 * Example:
137 * At the font position for a capital A-ring glyph, we
138 * may have:
139 * 00C5,212B,FFFE,0041,030A,FFFF
140 * Some font positions may be described by sequences only,
141 * namely when there is no precomposed Unicode value for the glyph.
142 */
143#if !ENABLE_FEATURE_LOADFONT_PSF2
144#define do_loadtable(fd, inbuf, tailsz, fontsize, psf2) \
145 do_loadtable(fd, inbuf, tailsz, fontsize)
146#endif
147static void do_loadtable(int fd, unsigned char *inbuf, int tailsz, int fontsize, int psf2)
148{
149#if !ENABLE_FEATURE_LOADFONT_PSF2
150/* gcc 4.3.1 code size: */
151# define psf2 0 /* +0 bytes */
152// const int psf2 = 0; /* +8 bytes */
153// enum { psf2 = 0 }; /* +13 bytes */
154#endif
155 struct unimapinit advice;
156 struct unimapdesc ud;
157 struct unipair *up;
158 int ct = 0, maxct;
159 int glyph;
160 uint16_t unicode;
161
162 maxct = tailsz; /* more than enough */
163 up = xmalloc(maxct * sizeof(*up));
164
165 for (glyph = 0; glyph < fontsize; glyph++) {
166 while (tailsz > 0) {
167 if (!psf2) { /* PSF1 */
168 unicode = (((uint16_t) inbuf[1]) << 8) + inbuf[0];
169 tailsz -= 2;
170 inbuf += 2;
171 if (unicode == PSF1_SEPARATOR)
172 break;
173 } else { /* PSF2 */
174#if ENABLE_FEATURE_LOADFONT_PSF2
175 --tailsz;
176 unicode = *inbuf++;
177 if (unicode == PSF2_SEPARATOR) {
178 break;
179 } else if (unicode == PSF2_STARTSEQ) {
180 bb_error_msg_and_die("unicode sequences not implemented");
181 } else if (unicode >= 0xC0) {
182 if (unicode >= 0xFC)
183 unicode &= 0x01, maxct = 5;
184 else if (unicode >= 0xF8)
185 unicode &= 0x03, maxct = 4;
186 else if (unicode >= 0xF0)
187 unicode &= 0x07, maxct = 3;
188 else if (unicode >= 0xE0)
189 unicode &= 0x0F, maxct = 2;
190 else
191 unicode &= 0x1F, maxct = 1;
192 do {
193 if (tailsz <= 0 || *inbuf < 0x80 || *inbuf > 0xBF)
194 bb_error_msg_and_die("illegal UTF-8 character");
195 --tailsz;
196 unicode = (unicode << 6) + (*inbuf++ & 0x3F);
197 } while (--maxct > 0);
198 } else if (unicode >= 0x80) {
199 bb_error_msg_and_die("illegal UTF-8 character");
200 }
201#else
202 return;
203#endif
204 }
205 up[ct].unicode = unicode;
206 up[ct].fontpos = glyph;
207 ct++;
208 }
209 }
210
211 /* Note: after PIO_UNIMAPCLR and before PIO_UNIMAP
212 this printf did not work on many kernels */
213
214 advice.advised_hashsize = 0;
215 advice.advised_hashstep = 0;
216 advice.advised_hashlevel = 0;
217 xioctl(fd, PIO_UNIMAPCLR, &advice);
218 ud.entry_ct = ct;
219 ud.entries = up;
220 xioctl(fd, PIO_UNIMAP, &ud);
221#undef psf2
222}
223
224static void do_load(int fd, unsigned char *buffer, size_t len)
225{
226 int height;
227 int width = 8;
228 int charsize;
229 int fontsize = 256;
230 int has_table = 0;
231 unsigned char *font = buffer;
232 unsigned char *table;
233
234 if (len >= sizeof(struct psf1_header) && PSF1_MAGIC_OK(psf1h(buffer))) {
235 if (psf1h(buffer)->mode > PSF1_MAXMODE)
236 bb_error_msg_and_die("unsupported psf file mode");
237 if (psf1h(buffer)->mode & PSF1_MODE512)
238 fontsize = 512;
239 if (psf1h(buffer)->mode & PSF1_MODEHASTAB)
240 has_table = 1;
241 height = charsize = psf1h(buffer)->charsize;
242 font += sizeof(struct psf1_header);
243 } else
244#if ENABLE_FEATURE_LOADFONT_PSF2
245 if (len >= sizeof(struct psf2_header) && PSF2_MAGIC_OK(psf2h(buffer))) {
246 if (psf2h(buffer)->version > PSF2_MAXVERSION)
247 bb_error_msg_and_die("unsupported psf file version");
248 fontsize = psf2h(buffer)->length;
249 if (psf2h(buffer)->flags & PSF2_HAS_UNICODE_TABLE)
250 has_table = 2;
251 charsize = psf2h(buffer)->charsize;
252 height = psf2h(buffer)->height;
253 width = psf2h(buffer)->width;
254 font += psf2h(buffer)->headersize;
255 } else
256#endif
257#if ENABLE_FEATURE_LOADFONT_RAW
258 if (len == 9780) { /* file with three code pages? */
259 charsize = height = 16;
260 font += 40;
261 } else if ((len & 0377) == 0) { /* bare font */
262 charsize = height = len / 256;
263 } else
264#endif
265 {
266 bb_error_msg_and_die("input file: bad length or unsupported font type");
267 }
268
269#if !defined(PIO_FONTX) || defined(__sparc__)
270 if (fontsize != 256)
271 bb_error_msg_and_die("only fontsize 256 supported");
272#endif
273
274 table = font + fontsize * charsize;
275 buffer += len;
276
277 if (table > buffer || (!has_table && table != buffer))
278 bb_error_msg_and_die("input file: bad length");
279
280 do_loadfont(fd, font, height, width, charsize, fontsize);
281
282 if (has_table)
283 do_loadtable(fd, table, buffer - table, fontsize, has_table - 1);
284}
285
286
287#if ENABLE_LOADFONT
288int loadfont_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
289int loadfont_main(int argc UNUSED_PARAM, char **argv)
290{
291 size_t len;
292 unsigned char *buffer;
293
294 // no arguments allowed!
295 opt_complementary = "=0";
296 getopt32(argv, "");
297
298 /*
299 * We used to look at the length of the input file
300 * with stat(); now that we accept compressed files,
301 * just read the entire file.
302 */
303 len = 32*1024; // can't be larger
304 buffer = xmalloc_read(STDIN_FILENO, &len);
305 // xmalloc_open_zipped_read_close(filename, &len);
306 if (!buffer)
307 bb_perror_msg_and_die("error reading input font");
308 do_load(get_console_fd_or_die(), buffer, len);
309
310 return EXIT_SUCCESS;
311}
312#endif
313
314#if ENABLE_SETFONT
315
316/*
317kbd-1.12:
318
319setfont [-O font+umap.orig] [-o font.orig] [-om cmap.orig]
320[-ou umap.orig] [-N] [font.new ...] [-m cmap] [-u umap] [-C console]
321[-hNN] [-v] [-V]
322
323-h NN Override font height
324-o file
325 Save previous font in file
326-O file
327 Save previous font and Unicode map in file
328-om file
329 Store console map in file
330-ou file
331 Save previous Unicode map in file
332-m file
333 Load console map or Unicode console map from file
334-u file
335 Load Unicode table describing the font from file
336 Example:
337 # cp866
338 0x00-0x7f idem
339 #
340 0x80 U+0410 # CYRILLIC CAPITAL LETTER A
341 0x81 U+0411 # CYRILLIC CAPITAL LETTER BE
342 0x82 U+0412 # CYRILLIC CAPITAL LETTER VE
343-C console
344 Set the font for the indicated console
345-v Verbose
346-V Version
347*/
348
349#if ENABLE_FEATURE_SETFONT_TEXTUAL_MAP
350static int ctoi(char *s)
351{
352 if (s[0] == '\'' && s[1] != '\0' && s[2] == '\'' && s[3] == '\0')
353 return s[1];
354 // U+ means 0x
355 if (s[0] == 'U' && s[1] == '+') {
356 s[0] = '0';
357 s[1] = 'x';
358 }
359 if (!isdigit(s[0]))
360 return -1;
361 return xstrtoul(s, 0);
362}
363#endif
364
365int setfont_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
366int setfont_main(int argc UNUSED_PARAM, char **argv)
367{
368 size_t len;
369 unsigned opts;
370 int fd;
371 unsigned char *buffer;
372 char *mapfilename;
373 const char *tty_name = CURRENT_TTY;
374
375 opt_complementary = "=1";
376 opts = getopt32(argv, "m:C:", &mapfilename, &tty_name);
377 argv += optind;
378
379 fd = xopen_nonblocking(tty_name);
380
381 if (sizeof(CONFIG_DEFAULT_SETFONT_DIR) > 1) { // if not ""
382 if (*argv[0] != '/') {
383 // goto default fonts location. don't die if doesn't exist
384 chdir(CONFIG_DEFAULT_SETFONT_DIR "/consolefonts");
385 }
386 }
387 // load font
388 len = 32*1024; // can't be larger
389 buffer = xmalloc_open_zipped_read_close(*argv, &len);
390 if (!buffer)
391 bb_simple_perror_msg_and_die(*argv);
392 do_load(fd, buffer, len);
393
394 // load the screen map, if any
395 if (opts & 1) { // -m
396 unsigned mode = PIO_SCRNMAP;
397 void *map;
398
399 if (sizeof(CONFIG_DEFAULT_SETFONT_DIR) > 1) { // if not ""
400 if (mapfilename[0] != '/') {
401 // goto default keymaps location
402 chdir(CONFIG_DEFAULT_SETFONT_DIR "/consoletrans");
403 }
404 }
405 // fetch keymap
406 map = xmalloc_open_zipped_read_close(mapfilename, &len);
407 if (!map)
408 bb_simple_perror_msg_and_die(mapfilename);
409 // file size is 256 or 512 bytes? -> assume binary map
410 if (len == E_TABSZ || len == 2*E_TABSZ) {
411 if (len == 2*E_TABSZ)
412 mode = PIO_UNISCRNMAP;
413 }
414#if ENABLE_FEATURE_SETFONT_TEXTUAL_MAP
415 // assume textual Unicode console maps:
416 // 0x00 U+0000 # NULL (NUL)
417 // 0x01 U+0001 # START OF HEADING (SOH)
418 // 0x02 U+0002 # START OF TEXT (STX)
419 // 0x03 U+0003 # END OF TEXT (ETX)
420 else {
421 int i;
422 char *token[2];
423 parser_t *parser;
424
425 if (ENABLE_FEATURE_CLEAN_UP)
426 free(map);
427 map = xmalloc(E_TABSZ * sizeof(unsigned short));
428
429#define unicodes ((unsigned short *)map)
430 // fill vanilla map
431 for (i = 0; i < E_TABSZ; i++)
432 unicodes[i] = 0xf000 + i;
433
434 parser = config_open(mapfilename);
435 while (config_read(parser, token, 2, 2, "# \t", PARSE_NORMAL | PARSE_MIN_DIE)) {
436 // parse code/value pair
437 int a = ctoi(token[0]);
438 int b = ctoi(token[1]);
439 if (a < 0 || a >= E_TABSZ
440 || b < 0 || b > 65535
441 ) {
442 bb_error_msg_and_die("map format");
443 }
444 // patch map
445 unicodes[a] = b;
446 // unicode character is met?
447 if (b > 255)
448 mode = PIO_UNISCRNMAP;
449 }
450 if (ENABLE_FEATURE_CLEAN_UP)
451 config_close(parser);
452
453 if (mode != PIO_UNISCRNMAP) {
454#define asciis ((unsigned char *)map)
455 for (i = 0; i < E_TABSZ; i++)
456 asciis[i] = unicodes[i];
457#undef asciis
458 }
459#undef unicodes
460 }
461#endif // ENABLE_FEATURE_SETFONT_TEXTUAL_MAP
462
463 // do set screen map
464 xioctl(fd, mode, map);
465
466 if (ENABLE_FEATURE_CLEAN_UP)
467 free(map);
468 }
469
470 return EXIT_SUCCESS;
471}
472#endif
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