Magellan Linux

Contents of /trunk/mkinitrd-magellan/busybox/console-tools/loadfont.c

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Revision 984 - (show annotations) (download)
Sun May 30 11:32:42 2010 UTC (13 years, 11 months ago) by niro
File MIME type: text/plain
File size: 9385 byte(s)
-updated to busybox-1.16.1 and enabled blkid/uuid support in default config
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 tarball for details.
11 */
12 #include "libbb.h"
13 #include <sys/kd.h>
14
15 #ifndef KDFONTOP
16 #define KDFONTOP 0x4B72
17 struct 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
25 #define KD_FONT_OP_SET 0 /* Set font */
26 #define KD_FONT_OP_GET 1 /* Get font */
27 #define KD_FONT_OP_SET_DEFAULT 2 /* Set font to default,
28 data points to name / NULL */
29 #define KD_FONT_OP_COPY 3 /* Copy from another console */
30
31 #define KD_FONT_FLAG_OLD 0x80000000 /* Invoked via old interface */
32 #define KD_FONT_FLAG_DONT_RECALC 1 /* Don't call adjust_height() */
33 /* (Used internally for PIO_FONT support) */
34 #endif /* KDFONTOP */
35
36
37 enum {
38 PSF_MAGIC1 = 0x36,
39 PSF_MAGIC2 = 0x04,
40
41 PSF_MODE512 = 0x01,
42 PSF_MODEHASTAB = 0x02,
43 PSF_MAXMODE = 0x03,
44 PSF_SEPARATOR = 0xffff
45 };
46
47 struct psf_header {
48 unsigned char magic1, magic2; /* Magic number */
49 unsigned char mode; /* PSF font mode */
50 unsigned char charsize; /* Character size */
51 };
52
53 #define PSF_MAGIC_OK(x) ((x)->magic1 == PSF_MAGIC1 && (x)->magic2 == PSF_MAGIC2)
54
55 static void do_loadfont(int fd, unsigned char *inbuf, int unit, int fontsize)
56 {
57 char *buf;
58 int i;
59
60 if (unit < 1 || unit > 32)
61 bb_error_msg_and_die("bad character size %d", unit);
62
63 buf = xzalloc(16 * 1024);
64 for (i = 0; i < fontsize; i++)
65 memcpy(buf + (32 * i), inbuf + (unit * i), unit);
66
67 { /* KDFONTOP */
68 struct console_font_op cfo;
69
70 cfo.op = KD_FONT_OP_SET;
71 cfo.flags = 0;
72 cfo.width = 8;
73 cfo.height = unit;
74 cfo.charcount = fontsize;
75 cfo.data = (void*)buf;
76 #if 0
77 if (!ioctl_or_perror(fd, KDFONTOP, &cfo, "KDFONTOP ioctl failed (will try PIO_FONTX)"))
78 goto ret; /* success */
79 #else
80 xioctl(fd, KDFONTOP, &cfo);
81 #endif
82 }
83
84 #if 0
85 /* These ones do not honour -C tty (they set font on current tty regardless)
86 * On x86, this distinction is visible on framebuffer consoles
87 * (regular character consoles may have only one shared font anyway)
88 */
89 #if defined(PIO_FONTX) && !defined(__sparc__)
90 {
91 struct consolefontdesc cfd;
92
93 cfd.charcount = fontsize;
94 cfd.charheight = unit;
95 cfd.chardata = buf;
96
97 if (!ioctl_or_perror(fd, PIO_FONTX, &cfd, "PIO_FONTX ioctl failed (will try PIO_FONT)"))
98 goto ret; /* success */
99 }
100 #endif
101 xioctl(fd, PIO_FONT, buf);
102 ret:
103 #endif /* 0 */
104 free(buf);
105 }
106
107 static void do_loadtable(int fd, unsigned char *inbuf, int tailsz, int fontsize)
108 {
109 struct unimapinit advice;
110 struct unimapdesc ud;
111 struct unipair *up;
112 int ct = 0, maxct;
113 int glyph;
114 uint16_t unicode;
115
116 maxct = tailsz; /* more than enough */
117 up = xmalloc(maxct * sizeof(struct unipair));
118
119 for (glyph = 0; glyph < fontsize; glyph++) {
120 while (tailsz >= 2) {
121 unicode = (((uint16_t) inbuf[1]) << 8) + inbuf[0];
122 tailsz -= 2;
123 inbuf += 2;
124 if (unicode == PSF_SEPARATOR)
125 break;
126 up[ct].unicode = unicode;
127 up[ct].fontpos = glyph;
128 ct++;
129 }
130 }
131
132 /* Note: after PIO_UNIMAPCLR and before PIO_UNIMAP
133 this printf did not work on many kernels */
134
135 advice.advised_hashsize = 0;
136 advice.advised_hashstep = 0;
137 advice.advised_hashlevel = 0;
138 xioctl(fd, PIO_UNIMAPCLR, &advice);
139 ud.entry_ct = ct;
140 ud.entries = up;
141 xioctl(fd, PIO_UNIMAP, &ud);
142 }
143
144 static void do_load(int fd, struct psf_header *psfhdr, size_t len)
145 {
146 int unit;
147 int fontsize;
148 int hastable;
149 unsigned head0, head = head;
150
151 /* test for psf first */
152 if (len >= sizeof(struct psf_header) && PSF_MAGIC_OK(psfhdr)) {
153 if (psfhdr->mode > PSF_MAXMODE)
154 bb_error_msg_and_die("unsupported psf file mode");
155 fontsize = ((psfhdr->mode & PSF_MODE512) ? 512 : 256);
156 #if !defined(PIO_FONTX) || defined(__sparc__)
157 if (fontsize != 256)
158 bb_error_msg_and_die("only fontsize 256 supported");
159 #endif
160 hastable = (psfhdr->mode & PSF_MODEHASTAB);
161 unit = psfhdr->charsize;
162 head0 = sizeof(struct psf_header);
163
164 head = head0 + fontsize * unit;
165 if (head > len || (!hastable && head != len))
166 bb_error_msg_and_die("input file: bad length");
167 } else {
168 /* file with three code pages? */
169 if (len == 9780) {
170 head0 = 40;
171 unit = 16;
172 } else {
173 /* bare font */
174 if (len & 0377)
175 bb_error_msg_and_die("input file: bad length");
176 head0 = 0;
177 unit = len / 256;
178 }
179 fontsize = 256;
180 hastable = 0;
181 }
182
183 do_loadfont(fd, (unsigned char *)psfhdr + head0, unit, fontsize);
184 if (hastable)
185 do_loadtable(fd, (unsigned char *)psfhdr + head, len - head, fontsize);
186 }
187
188 #if ENABLE_LOADFONT
189 int loadfont_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
190 int loadfont_main(int argc UNUSED_PARAM, char **argv)
191 {
192 size_t len;
193 struct psf_header *psfhdr;
194
195 // no arguments allowed!
196 opt_complementary = "=0";
197 getopt32(argv, "");
198
199 /*
200 * We used to look at the length of the input file
201 * with stat(); now that we accept compressed files,
202 * just read the entire file.
203 */
204 len = 32*1024; // can't be larger
205 psfhdr = xmalloc_read(STDIN_FILENO, &len);
206 // xmalloc_open_zipped_read_close(filename, &len);
207 if (!psfhdr)
208 bb_perror_msg_and_die("error reading input font");
209 do_load(get_console_fd_or_die(), psfhdr, len);
210
211 return EXIT_SUCCESS;
212 }
213 #endif
214
215 #if ENABLE_SETFONT
216
217 /*
218 kbd-1.12:
219
220 setfont [-O font+umap.orig] [-o font.orig] [-om cmap.orig]
221 [-ou umap.orig] [-N] [font.new ...] [-m cmap] [-u umap] [-C console]
222 [-hNN] [-v] [-V]
223
224 -h NN Override font height
225 -o file
226 Save previous font in file
227 -O file
228 Save previous font and Unicode map in file
229 -om file
230 Store console map in file
231 -ou file
232 Save previous Unicode map in file
233 -m file
234 Load console map or Unicode console map from file
235 -u file
236 Load Unicode table describing the font from file
237 Example:
238 # cp866
239 0x00-0x7f idem
240 #
241 0x80 U+0410 # CYRILLIC CAPITAL LETTER A
242 0x81 U+0411 # CYRILLIC CAPITAL LETTER BE
243 0x82 U+0412 # CYRILLIC CAPITAL LETTER VE
244 -C console
245 Set the font for the indicated console
246 -v Verbose
247 -V Version
248 */
249
250 #if ENABLE_FEATURE_SETFONT_TEXTUAL_MAP
251 static int ctoi(char *s)
252 {
253 if (s[0] == '\'' && s[1] != '\0' && s[2] == '\'' && s[3] == '\0')
254 return s[1];
255 // U+ means 0x
256 if (s[0] == 'U' && s[1] == '+') {
257 s[0] = '0';
258 s[1] = 'x';
259 }
260 if (!isdigit(s[0]))
261 return -1;
262 return xstrtoul(s, 0);
263 }
264 #endif
265
266 int setfont_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
267 int setfont_main(int argc UNUSED_PARAM, char **argv)
268 {
269 size_t len;
270 unsigned opts;
271 int fd;
272 struct psf_header *psfhdr;
273 char *mapfilename;
274 const char *tty_name = CURRENT_TTY;
275
276 opt_complementary = "=1";
277 opts = getopt32(argv, "m:C:", &mapfilename, &tty_name);
278 argv += optind;
279
280 fd = xopen_nonblocking(tty_name);
281
282 if (sizeof(CONFIG_DEFAULT_SETFONT_DIR) > 1) { // if not ""
283 if (*argv[0] != '/') {
284 // goto default fonts location. don't die if doesn't exist
285 chdir(CONFIG_DEFAULT_SETFONT_DIR "/consolefonts");
286 }
287 }
288 // load font
289 len = 32*1024; // can't be larger
290 psfhdr = xmalloc_open_zipped_read_close(*argv, &len);
291 if (!psfhdr)
292 bb_simple_perror_msg_and_die(*argv);
293 do_load(fd, psfhdr, len);
294
295 // load the screen map, if any
296 if (opts & 1) { // -m
297 unsigned mode = PIO_SCRNMAP;
298 void *map;
299
300 if (sizeof(CONFIG_DEFAULT_SETFONT_DIR) > 1) { // if not ""
301 if (mapfilename[0] != '/') {
302 // goto default keymaps location
303 chdir(CONFIG_DEFAULT_SETFONT_DIR "/consoletrans");
304 }
305 }
306 // fetch keymap
307 map = xmalloc_open_zipped_read_close(mapfilename, &len);
308 if (!map)
309 bb_simple_perror_msg_and_die(mapfilename);
310 // file size is 256 or 512 bytes? -> assume binary map
311 if (len == E_TABSZ || len == 2*E_TABSZ) {
312 if (len == 2*E_TABSZ)
313 mode = PIO_UNISCRNMAP;
314 }
315 #if ENABLE_FEATURE_SETFONT_TEXTUAL_MAP
316 // assume textual Unicode console maps:
317 // 0x00 U+0000 # NULL (NUL)
318 // 0x01 U+0001 # START OF HEADING (SOH)
319 // 0x02 U+0002 # START OF TEXT (STX)
320 // 0x03 U+0003 # END OF TEXT (ETX)
321 else {
322 int i;
323 char *token[2];
324 parser_t *parser;
325
326 if (ENABLE_FEATURE_CLEAN_UP)
327 free(map);
328 map = xmalloc(E_TABSZ * sizeof(unsigned short));
329
330 #define unicodes ((unsigned short *)map)
331 // fill vanilla map
332 for (i = 0; i < E_TABSZ; i++)
333 unicodes[i] = 0xf000 + i;
334
335 parser = config_open(mapfilename);
336 while (config_read(parser, token, 2, 2, "# \t", PARSE_NORMAL | PARSE_MIN_DIE)) {
337 // parse code/value pair
338 int a = ctoi(token[0]);
339 int b = ctoi(token[1]);
340 if (a < 0 || a >= E_TABSZ
341 || b < 0 || b > 65535
342 ) {
343 bb_error_msg_and_die("map format");
344 }
345 // patch map
346 unicodes[a] = b;
347 // unicode character is met?
348 if (b > 255)
349 mode = PIO_UNISCRNMAP;
350 }
351 if (ENABLE_FEATURE_CLEAN_UP)
352 config_close(parser);
353
354 if (mode != PIO_UNISCRNMAP) {
355 #define asciis ((unsigned char *)map)
356 for (i = 0; i < E_TABSZ; i++)
357 asciis[i] = unicodes[i];
358 #undef asciis
359 }
360 #undef unicodes
361 }
362 #endif // ENABLE_FEATURE_SETFONT_TEXTUAL_MAP
363
364 // do set screen map
365 xioctl(fd, mode, map);
366
367 if (ENABLE_FEATURE_CLEAN_UP)
368 free(map);
369 }
370
371 return EXIT_SUCCESS;
372 }
373 #endif