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

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Revision 816 - (hide annotations) (download)
Fri Apr 24 18:33:46 2009 UTC (15 years ago) by niro
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File size: 9311 byte(s)
-updated to busybox-1.13.4
1 niro 532 /* 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 niro 816 #include "libbb.h"
11 niro 532 #include <sys/kd.h>
12    
13 niro 816 #ifndef KDFONTOP
14     #define KDFONTOP 0x4B72
15     struct console_font_op {
16     unsigned op; /* KD_FONT_OP_* */
17     unsigned flags; /* KD_FONT_FLAG_* */
18     unsigned width, height;
19     unsigned charcount;
20     unsigned char *data; /* font data with height fixed to 32 */
21     };
22    
23     #define KD_FONT_OP_SET 0 /* Set font */
24     #define KD_FONT_OP_GET 1 /* Get font */
25     #define KD_FONT_OP_SET_DEFAULT 2 /* Set font to default,
26     data points to name / NULL */
27     #define KD_FONT_OP_COPY 3 /* Copy from another console */
28    
29     #define KD_FONT_FLAG_OLD 0x80000000 /* Invoked via old interface */
30     #define KD_FONT_FLAG_DONT_RECALC 1 /* Don't call adjust_height() */
31     /* (Used internally for PIO_FONT support) */
32     #endif /* KDFONTOP */
33    
34    
35 niro 532 enum {
36     PSF_MAGIC1 = 0x36,
37     PSF_MAGIC2 = 0x04,
38    
39     PSF_MODE512 = 0x01,
40     PSF_MODEHASTAB = 0x02,
41     PSF_MAXMODE = 0x03,
42 niro 816 PSF_SEPARATOR = 0xffff
43 niro 532 };
44    
45     struct psf_header {
46 niro 816 unsigned char magic1, magic2; /* Magic number */
47     unsigned char mode; /* PSF font mode */
48     unsigned char charsize; /* Character size */
49 niro 532 };
50    
51 niro 816 #define PSF_MAGIC_OK(x) ((x)->magic1 == PSF_MAGIC1 && (x)->magic2 == PSF_MAGIC2)
52 niro 532
53     static void do_loadfont(int fd, unsigned char *inbuf, int unit, int fontsize)
54     {
55 niro 816 char *buf;
56 niro 532 int i;
57    
58     if (unit < 1 || unit > 32)
59     bb_error_msg_and_die("bad character size %d", unit);
60    
61 niro 816 buf = xzalloc(16 * 1024);
62 niro 532 for (i = 0; i < fontsize; i++)
63     memcpy(buf + (32 * i), inbuf + (unit * i), unit);
64    
65 niro 816 { /* KDFONTOP */
66     struct console_font_op cfo;
67    
68     cfo.op = KD_FONT_OP_SET;
69     cfo.flags = 0;
70     cfo.width = 8;
71     cfo.height = unit;
72     cfo.charcount = fontsize;
73     cfo.data = (void*)buf;
74     #if 0
75     if (!ioctl_or_perror(fd, KDFONTOP, &cfo, "KDFONTOP ioctl failed (will try PIO_FONTX)"))
76     goto ret; /* success */
77     #else
78     xioctl(fd, KDFONTOP, &cfo);
79     #endif
80     }
81    
82     #if 0
83     /* These ones do not honour -C tty (they set font on current tty regardless)
84     * On x86, this distinction is visible on framebuffer consoles
85     * (regular character consoles may have only one shared font anyway)
86     */
87     #if defined(PIO_FONTX) && !defined(__sparc__)
88 niro 532 {
89     struct consolefontdesc cfd;
90    
91     cfd.charcount = fontsize;
92     cfd.charheight = unit;
93     cfd.chardata = buf;
94    
95 niro 816 if (!ioctl_or_perror(fd, PIO_FONTX, &cfd, "PIO_FONTX ioctl failed (will try PIO_FONT)"))
96     goto ret; /* success */
97 niro 532 }
98     #endif
99 niro 816 xioctl(fd, PIO_FONT, buf);
100     ret:
101     #endif /* 0 */
102     free(buf);
103 niro 532 }
104    
105 niro 816 static void do_loadtable(int fd, unsigned char *inbuf, int tailsz, int fontsize)
106 niro 532 {
107     struct unimapinit advice;
108     struct unimapdesc ud;
109     struct unipair *up;
110     int ct = 0, maxct;
111     int glyph;
112     uint16_t unicode;
113    
114 niro 816 maxct = tailsz; /* more than enough */
115 niro 532 up = xmalloc(maxct * sizeof(struct unipair));
116    
117     for (glyph = 0; glyph < fontsize; glyph++) {
118     while (tailsz >= 2) {
119     unicode = (((uint16_t) inbuf[1]) << 8) + inbuf[0];
120     tailsz -= 2;
121     inbuf += 2;
122     if (unicode == PSF_SEPARATOR)
123     break;
124     up[ct].unicode = unicode;
125     up[ct].fontpos = glyph;
126     ct++;
127     }
128     }
129    
130     /* Note: after PIO_UNIMAPCLR and before PIO_UNIMAP
131     this printf did not work on many kernels */
132    
133     advice.advised_hashsize = 0;
134     advice.advised_hashstep = 0;
135     advice.advised_hashlevel = 0;
136 niro 816 xioctl(fd, PIO_UNIMAPCLR, &advice);
137 niro 532 ud.entry_ct = ct;
138     ud.entries = up;
139 niro 816 xioctl(fd, PIO_UNIMAP, &ud);
140 niro 532 }
141    
142 niro 816 static void do_load(int fd, struct psf_header *psfhdr, size_t len)
143 niro 532 {
144     int unit;
145 niro 816 int fontsize;
146     int hastable;
147     unsigned head0, head = head;
148 niro 532
149 niro 816 /* test for psf first */
150     if (len >= sizeof(struct psf_header) && PSF_MAGIC_OK(psfhdr)) {
151     if (psfhdr->mode > PSF_MAXMODE)
152     bb_error_msg_and_die("unsupported psf file mode");
153     fontsize = ((psfhdr->mode & PSF_MODE512) ? 512 : 256);
154     #if !defined(PIO_FONTX) || defined(__sparc__)
155     if (fontsize != 256)
156     bb_error_msg_and_die("only fontsize 256 supported");
157     #endif
158     hastable = (psfhdr->mode & PSF_MODEHASTAB);
159     unit = psfhdr->charsize;
160     head0 = sizeof(struct psf_header);
161    
162     head = head0 + fontsize * unit;
163     if (head > len || (!hastable && head != len))
164     bb_error_msg_and_die("input file: bad length");
165     } else {
166     /* file with three code pages? */
167     if (len == 9780) {
168     head0 = 40;
169     unit = 16;
170     } else {
171     /* bare font */
172     if (len & 0377)
173     bb_error_msg_and_die("input file: bad length");
174     head0 = 0;
175     unit = len / 256;
176     }
177     fontsize = 256;
178     hastable = 0;
179     }
180    
181     do_loadfont(fd, (unsigned char *)psfhdr + head0, unit, fontsize);
182     if (hastable)
183     do_loadtable(fd, (unsigned char *)psfhdr + head, len - head, fontsize);
184     }
185    
186     #if ENABLE_LOADFONT
187     int loadfont_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
188     int loadfont_main(int argc UNUSED_PARAM, char **argv)
189     {
190     size_t len;
191     struct psf_header *psfhdr;
192    
193     // no arguments allowed!
194     opt_complementary = "=0";
195     getopt32(argv, "");
196    
197 niro 532 /*
198     * We used to look at the length of the input file
199     * with stat(); now that we accept compressed files,
200     * just read the entire file.
201     */
202 niro 816 len = 32*1024; // can't be larger
203     psfhdr = xmalloc_read(STDIN_FILENO, &len);
204     // xmalloc_open_zipped_read_close(filename, &len);
205     if (!psfhdr)
206 niro 532 bb_perror_msg_and_die("error reading input font");
207 niro 816 do_load(get_console_fd_or_die(), psfhdr, len);
208 niro 532
209 niro 816 return EXIT_SUCCESS;
210     }
211     #endif
212 niro 532
213 niro 816 #if ENABLE_SETFONT
214 niro 532
215 niro 816 /*
216     kbd-1.12:
217 niro 532
218 niro 816 setfont [-O font+umap.orig] [-o font.orig] [-om cmap.orig]
219     [-ou umap.orig] [-N] [font.new ...] [-m cmap] [-u umap] [-C console]
220     [-hNN] [-v] [-V]
221 niro 532
222 niro 816 -h NN Override font height
223     -o file
224     Save previous font in file
225     -O file
226     Save previous font and Unicode map in file
227     -om file
228     Store console map in file
229     -ou file
230     Save previous Unicode map in file
231     -m file
232     Load console map or Unicode console map from file
233     -u file
234     Load Unicode table describing the font from file
235     Example:
236     # cp866
237     0x00-0x7f idem
238     #
239     0x80 U+0410 # CYRILLIC CAPITAL LETTER A
240     0x81 U+0411 # CYRILLIC CAPITAL LETTER BE
241     0x82 U+0412 # CYRILLIC CAPITAL LETTER VE
242     -C console
243     Set the font for the indicated console
244     -v Verbose
245     -V Version
246     */
247    
248     #if ENABLE_FEATURE_SETFONT_TEXTUAL_MAP
249     static int ctoi(char *s)
250     {
251     if (s[0] == '\'' && s[1] != '\0' && s[2] == '\'' && s[3] == '\0')
252     return s[1];
253     // U+ means 0x
254     if (s[0] == 'U' && s[1] == '+') {
255     s[0] = '0';
256     s[1] = 'x';
257     }
258     if (!isdigit(s[0]))
259     return -1;
260     return xstrtoul(s, 0);
261     }
262 niro 532 #endif
263    
264 niro 816 int setfont_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
265     int setfont_main(int argc UNUSED_PARAM, char **argv)
266     {
267     size_t len;
268     unsigned opts;
269     int fd;
270     struct psf_header *psfhdr;
271     char *mapfilename;
272     const char *tty_name = CURRENT_TTY;
273    
274     opt_complementary = "=1";
275     opts = getopt32(argv, "m:C:", &mapfilename, &tty_name);
276     argv += optind;
277    
278     fd = xopen(tty_name, O_NONBLOCK);
279    
280     if (sizeof(CONFIG_DEFAULT_SETFONT_DIR) > 1) { // if not ""
281     if (*argv[0] != '/') {
282     // goto default fonts location. don't die if doesn't exist
283     chdir(CONFIG_DEFAULT_SETFONT_DIR "/consolefonts");
284     }
285 niro 532 }
286 niro 816 // load font
287     len = 32*1024; // can't be larger
288     psfhdr = xmalloc_open_zipped_read_close(*argv, &len);
289     if (!psfhdr)
290     bb_simple_perror_msg_and_die(*argv);
291     do_load(fd, psfhdr, len);
292 niro 532
293 niro 816 // load the screen map, if any
294     if (opts & 1) { // -m
295     unsigned mode = PIO_SCRNMAP;
296     void *map;
297    
298     if (sizeof(CONFIG_DEFAULT_SETFONT_DIR) > 1) { // if not ""
299     if (mapfilename[0] != '/') {
300     // goto default keymaps location
301     chdir(CONFIG_DEFAULT_SETFONT_DIR "/consoletrans");
302     }
303     }
304     // fetch keymap
305     map = xmalloc_open_zipped_read_close(mapfilename, &len);
306     if (!map)
307     bb_simple_perror_msg_and_die(mapfilename);
308     // file size is 256 or 512 bytes? -> assume binary map
309     if (len == E_TABSZ || len == 2*E_TABSZ) {
310     if (len == 2*E_TABSZ)
311     mode = PIO_UNISCRNMAP;
312     }
313     #if ENABLE_FEATURE_SETFONT_TEXTUAL_MAP
314     // assume textual Unicode console maps:
315     // 0x00 U+0000 # NULL (NUL)
316     // 0x01 U+0001 # START OF HEADING (SOH)
317     // 0x02 U+0002 # START OF TEXT (STX)
318     // 0x03 U+0003 # END OF TEXT (ETX)
319     else {
320     int i;
321     char *token[2];
322     parser_t *parser;
323    
324     if (ENABLE_FEATURE_CLEAN_UP)
325     free(map);
326     map = xmalloc(E_TABSZ * sizeof(unsigned short));
327    
328     #define unicodes ((unsigned short *)map)
329     // fill vanilla map
330     for (i = 0; i < E_TABSZ; i++)
331     unicodes[i] = 0xf000 + i;
332    
333     parser = config_open(mapfilename);
334     while (config_read(parser, token, 2, 2, "# \t", PARSE_NORMAL | PARSE_MIN_DIE)) {
335     // parse code/value pair
336     int a = ctoi(token[0]);
337     int b = ctoi(token[1]);
338     if (a < 0 || a >= E_TABSZ
339     || b < 0 || b > 65535
340     ) {
341     bb_error_msg_and_die("map format");
342     }
343     // patch map
344     unicodes[a] = b;
345     // unicode character is met?
346     if (b > 255)
347     mode = PIO_UNISCRNMAP;
348     }
349     if (ENABLE_FEATURE_CLEAN_UP)
350     config_close(parser);
351    
352     if (mode != PIO_UNISCRNMAP) {
353     #define asciis ((unsigned char *)map)
354     for (i = 0; i < E_TABSZ; i++)
355     asciis[i] = unicodes[i];
356     #undef asciis
357     }
358     #undef unicodes
359     }
360     #endif // ENABLE_FEATURE_SETFONT_TEXTUAL_MAP
361    
362     // do set screen map
363     xioctl(fd, mode, map);
364    
365     if (ENABLE_FEATURE_CLEAN_UP)
366     free(map);
367 niro 532 }
368 niro 816
369     return EXIT_SUCCESS;
370 niro 532 }
371 niro 816 #endif