xref: /freebsd/sys/dev/syscons/scterm-teken.c (revision df9489689d32c57c8fcd01e9586cb8abfb39ebbe)
1 /*-
2  * Copyright (c) 1999 Kazutaka YOKOTA <yokota@zodiac.mech.utsunomiya-u.ac.jp>
3  * All rights reserved.
4  *
5  * Copyright (c) 2008-2009 Ed Schouten <ed@FreeBSD.org>
6  * All rights reserved.
7  *
8  * Redistribution and use in source and binary forms, with or without
9  * modification, are permitted provided that the following conditions
10  * are met:
11  * 1. Redistributions of source code must retain the above copyright
12  *    notice, this list of conditions and the following disclaimer as
13  *    the first lines of this file unmodified.
14  * 2. Redistributions in binary form must reproduce the above copyright
15  *    notice, this list of conditions and the following disclaimer in the
16  *    documentation and/or other materials provided with the distribution.
17  *
18  * THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR
19  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
20  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
21  * IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT,
22  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
23  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
27  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28  */
29 
30 #include <sys/cdefs.h>
31 __FBSDID("$FreeBSD$");
32 
33 #include "opt_syscons.h"
34 #include "opt_teken.h"
35 
36 #include <sys/param.h>
37 #include <sys/systm.h>
38 #include <sys/kernel.h>
39 #include <sys/module.h>
40 #include <sys/consio.h>
41 #include <sys/kbio.h>
42 
43 #if defined(__arm__) || defined(__mips__) || \
44 	defined(__powerpc__) || defined(__sparc64__)
45 #include <machine/sc_machdep.h>
46 #else
47 #include <machine/pc/display.h>
48 #endif
49 
50 #include <dev/syscons/syscons.h>
51 
52 #include <teken/teken.h>
53 
54 static void scteken_sc_to_te_attr(unsigned char, teken_attr_t *);
55 static int scteken_te_to_sc_attr(const teken_attr_t *);
56 
57 static sc_term_init_t		scteken_init;
58 static sc_term_term_t		scteken_term;
59 static sc_term_puts_t		scteken_puts;
60 static sc_term_ioctl_t		scteken_ioctl;
61 static sc_term_default_attr_t	scteken_default_attr;
62 static sc_term_clear_t		scteken_clear;
63 static sc_term_input_t		scteken_input;
64 static sc_term_fkeystr_t	scteken_fkeystr;
65 static sc_term_sync_t		scteken_sync;
66 static void			scteken_nop(void);
67 
68 typedef struct {
69 	teken_t		ts_teken;
70 	int		ts_busy;
71 } teken_stat;
72 
73 static teken_stat	reserved_teken_stat;
74 
75 static sc_term_sw_t sc_term_scteken = {
76 	{ NULL, NULL },
77 	"scteken",			/* emulator name */
78 	"teken terminal",		/* description */
79 	"*",				/* matching renderer */
80 	sizeof(teken_stat),		/* softc size */
81 	0,
82 	scteken_init,
83 	scteken_term,
84 	scteken_puts,
85 	scteken_ioctl,
86 	(sc_term_reset_t *)scteken_nop,
87 	scteken_default_attr,
88 	scteken_clear,
89 	(sc_term_notify_t *)scteken_nop,
90 	scteken_input,
91 	scteken_fkeystr,
92 	scteken_sync,
93 };
94 
95 SCTERM_MODULE(scteken, sc_term_scteken);
96 
97 static tf_bell_t	scteken_bell;
98 static tf_cursor_t	scteken_cursor;
99 static tf_putchar_t	scteken_putchar;
100 static tf_fill_t	scteken_fill;
101 static tf_copy_t	scteken_copy;
102 static tf_param_t	scteken_param;
103 static tf_respond_t	scteken_respond;
104 
105 static const teken_funcs_t scteken_funcs = {
106 	.tf_bell	= scteken_bell,
107 	.tf_cursor	= scteken_cursor,
108 	.tf_putchar	= scteken_putchar,
109 	.tf_fill	= scteken_fill,
110 	.tf_copy	= scteken_copy,
111 	.tf_param	= scteken_param,
112 	.tf_respond	= scteken_respond,
113 };
114 
115 static int
116 scteken_init(scr_stat *scp, void **softc, int code)
117 {
118 	teken_stat *ts;
119 	teken_pos_t tp;
120 
121 	if (*softc == NULL) {
122 		if (reserved_teken_stat.ts_busy)
123 			return (EINVAL);
124 		*softc = &reserved_teken_stat;
125 	}
126 	ts = *softc;
127 
128 	switch (code) {
129 	case SC_TE_COLD_INIT:
130 		++sc_term_scteken.te_refcount;
131 		ts->ts_busy = 1;
132 		/* FALLTHROUGH */
133 	case SC_TE_WARM_INIT:
134 		teken_init(&ts->ts_teken, &scteken_funcs, scp);
135 #ifndef TEKEN_UTF8
136 		teken_set_8bit(&ts->ts_teken);
137 #endif /* !TEKEN_UTF8 */
138 #ifdef TEKEN_CONS25
139 		teken_set_cons25(&ts->ts_teken);
140 #endif /* TEKEN_CONS25 */
141 
142 		tp.tp_row = scp->ysize;
143 		tp.tp_col = scp->xsize;
144 		teken_set_winsize(&ts->ts_teken, &tp);
145 		break;
146 	}
147 
148 	return (0);
149 }
150 
151 static int
152 scteken_term(scr_stat *scp, void **softc)
153 {
154 
155 	if (*softc == &reserved_teken_stat) {
156 		*softc = NULL;
157 		reserved_teken_stat.ts_busy = 0;
158 	}
159 	--sc_term_scteken.te_refcount;
160 
161 	return (0);
162 }
163 
164 static void
165 scteken_puts(scr_stat *scp, u_char *buf, int len)
166 {
167 	teken_stat *ts = scp->ts;
168 
169 	scp->sc->write_in_progress++;
170 	teken_input(&ts->ts_teken, buf, len);
171 	scp->sc->write_in_progress--;
172 }
173 
174 static int
175 scteken_ioctl(scr_stat *scp, struct tty *tp, u_long cmd, caddr_t data,
176 	     struct thread *td)
177 {
178 	teken_stat *ts = scp->ts;
179 	vid_info_t *vi;
180 	int attr;
181 
182 	switch (cmd) {
183 	case GIO_ATTR:      	/* get current attributes */
184 		*(int*)data =
185 		    scteken_te_to_sc_attr(teken_get_curattr(&ts->ts_teken));
186 		return (0);
187 	case CONS_GETINFO:  	/* get current (virtual) console info */
188 		vi = (vid_info_t *)data;
189 		if (vi->size != sizeof(struct vid_info))
190 			return EINVAL;
191 
192 		attr = scteken_te_to_sc_attr(teken_get_defattr(&ts->ts_teken));
193 		vi->mv_norm.fore = attr & 0x0f;
194 		vi->mv_norm.back = (attr >> 4) & 0x0f;
195 		vi->mv_rev.fore = vi->mv_norm.back;
196 		vi->mv_rev.back = vi->mv_norm.fore;
197 		/*
198 		 * The other fields are filled by the upper routine. XXX
199 		 */
200 		return (ENOIOCTL);
201 	}
202 
203 	return (ENOIOCTL);
204 }
205 
206 static void
207 scteken_default_attr(scr_stat *scp, int color, int rev_color)
208 {
209 	teken_stat *ts = scp->ts;
210 	teken_attr_t ta;
211 
212 	scteken_sc_to_te_attr(color, &ta);
213 	teken_set_defattr(&ts->ts_teken, &ta);
214 }
215 
216 static void
217 scteken_clear(scr_stat *scp)
218 {
219 	teken_stat *ts = scp->ts;
220 
221 	sc_move_cursor(scp, 0, 0);
222 	scteken_sync(scp);
223 	sc_vtb_clear(&scp->vtb, scp->sc->scr_map[0x20],
224 		     scteken_te_to_sc_attr(teken_get_curattr(&ts->ts_teken))
225 		     << 8);
226 	mark_all(scp);
227 }
228 
229 static int
230 scteken_input(scr_stat *scp, int c, struct tty *tp)
231 {
232 
233 	return FALSE;
234 }
235 
236 static const char *
237 scteken_fkeystr(scr_stat *scp, int c)
238 {
239 	teken_stat *ts = scp->ts;
240 	unsigned int k;
241 
242 	switch (c) {
243 	case FKEY | F(1):  case FKEY | F(2):  case FKEY | F(3):
244 	case FKEY | F(4):  case FKEY | F(5):  case FKEY | F(6):
245 	case FKEY | F(7):  case FKEY | F(8):  case FKEY | F(9):
246 	case FKEY | F(10): case FKEY | F(11): case FKEY | F(12):
247 		k = TKEY_F1 + c - (FKEY | F(1));
248 		break;
249 	case FKEY | F(49):
250 		k = TKEY_HOME;
251 		break;
252 	case FKEY | F(50):
253 		k = TKEY_UP;
254 		break;
255 	case FKEY | F(51):
256 		k = TKEY_PAGE_UP;
257 		break;
258 	case FKEY | F(53):
259 		k = TKEY_LEFT;
260 		break;
261 	case FKEY | F(55):
262 		k = TKEY_RIGHT;
263 		break;
264 	case FKEY | F(57):
265 		k = TKEY_END;
266 		break;
267 	case FKEY | F(58):
268 		k = TKEY_DOWN;
269 		break;
270 	case FKEY | F(59):
271 		k = TKEY_PAGE_DOWN;
272 		break;
273 	case FKEY | F(60):
274 		k = TKEY_INSERT;
275 		break;
276 	case FKEY | F(61):
277 		k = TKEY_DELETE;
278 		break;
279 	default:
280 		return (NULL);
281 	}
282 
283 	return (teken_get_sequence(&ts->ts_teken, k));
284 }
285 
286 static void
287 scteken_sync(scr_stat *scp)
288 {
289 	teken_stat *ts = scp->ts;
290 	teken_pos_t tp;
291 
292 	tp.tp_col = scp->xsize;
293 	tp.tp_row = scp->ysize;
294 	teken_set_winsize_noreset(&ts->ts_teken, &tp);
295 	tp.tp_col = scp->xpos;
296 	tp.tp_row = scp->ypos;
297 	teken_set_cursor(&ts->ts_teken, &tp);
298 }
299 
300 static void
301 scteken_nop(void)
302 {
303 
304 }
305 
306 /*
307  * libteken routines.
308  */
309 
310 static const teken_color_t sc_to_te_color[] = {
311 	TC_BLACK,     TC_BLUE,         TC_GREEN,     TC_CYAN,
312 	TC_RED,       TC_MAGENTA,      TC_BROWN,     TC_WHITE,
313 };
314 
315 static const unsigned char te_to_sc_color[] = {
316 	FG_BLACK,     FG_RED,          FG_GREEN,     FG_BROWN,
317 	FG_BLUE,      FG_MAGENTA,      FG_CYAN,      FG_LIGHTGREY,
318 };
319 
320 static void
321 scteken_sc_to_te_attr(unsigned char color, teken_attr_t *a)
322 {
323 
324 	/*
325 	 * Conversions of attrs are not reversible.  Since sc attrs are
326 	 * pure colors in the simplest mode (16-color graphics) and the
327 	 * API is too deficient to tell us the mode, always convert to
328 	 * pure colors.  The conversion is essentially the identity except
329 	 * for reordering the non-brightness bits in the 2 color numbers.
330 	 */
331 	a->ta_format = 0;
332 	a->ta_fgcolor = sc_to_te_color[color & 7] | (color & 8);
333 	a->ta_bgcolor = sc_to_te_color[(color >> 4) & 7] | ((color >> 4) & 8);
334 }
335 
336 static int
337 scteken_te_to_sc_attr(const teken_attr_t *a)
338 {
339 	int attr;
340 	teken_color_t fg, bg;
341 
342 	if (a->ta_format & TF_REVERSE) {
343 		fg = a->ta_bgcolor;
344 		bg = a->ta_fgcolor;
345 	} else {
346 		fg = a->ta_fgcolor;
347 		bg = a->ta_bgcolor;
348 	}
349 	if (fg >= 16)
350 		fg = teken_256to16(fg);
351 	if (bg >= 16)
352 		bg = teken_256to16(bg);
353 	attr = te_to_sc_color[fg & 7] | (fg & 8) |
354 	    ((te_to_sc_color[bg & 7] | (bg & 8)) << 4);
355 
356 	/* XXX: underline mapping for Hercules adapter can be better. */
357 	if (a->ta_format & (TF_BOLD | TF_UNDERLINE))
358 		attr ^= 8;
359 	if (a->ta_format & TF_BLINK)
360 		attr ^= 0x80;
361 
362 	return (attr);
363 }
364 
365 static void
366 scteken_bell(void *arg)
367 {
368 	scr_stat *scp = arg;
369 
370 	sc_bell(scp, scp->bell_pitch, scp->bell_duration);
371 }
372 
373 static void
374 scteken_cursor(void *arg, const teken_pos_t *p)
375 {
376 	scr_stat *scp = arg;
377 
378 	sc_move_cursor(scp, p->tp_col, p->tp_row);
379 }
380 
381 #ifdef TEKEN_UTF8
382 struct unicp437 {
383 	uint16_t	unicode_base;
384 	uint8_t		cp437_base;
385 	uint8_t		length;
386 };
387 
388 static const struct unicp437 cp437table[] = {
389 	{ 0x0020, 0x20, 0x5e }, { 0x00a0, 0x20, 0x00 },
390 	{ 0x00a1, 0xad, 0x00 }, { 0x00a2, 0x9b, 0x00 },
391 	{ 0x00a3, 0x9c, 0x00 }, { 0x00a5, 0x9d, 0x00 },
392 	{ 0x00a7, 0x15, 0x00 }, { 0x00aa, 0xa6, 0x00 },
393 	{ 0x00ab, 0xae, 0x00 }, { 0x00ac, 0xaa, 0x00 },
394 	{ 0x00b0, 0xf8, 0x00 }, { 0x00b1, 0xf1, 0x00 },
395 	{ 0x00b2, 0xfd, 0x00 }, { 0x00b5, 0xe6, 0x00 },
396 	{ 0x00b6, 0x14, 0x00 }, { 0x00b7, 0xfa, 0x00 },
397 	{ 0x00ba, 0xa7, 0x00 }, { 0x00bb, 0xaf, 0x00 },
398 	{ 0x00bc, 0xac, 0x00 }, { 0x00bd, 0xab, 0x00 },
399 	{ 0x00bf, 0xa8, 0x00 }, { 0x00c0, 0x41, 0x00 },
400 	{ 0x00c1, 0x41, 0x00 }, { 0x00c2, 0x41, 0x00 },
401 	{ 0x00c4, 0x8e, 0x01 }, { 0x00c6, 0x92, 0x00 },
402 	{ 0x00c7, 0x80, 0x00 }, { 0x00c8, 0x45, 0x00 },
403 	{ 0x00c9, 0x90, 0x00 }, { 0x00ca, 0x45, 0x00 },
404 	{ 0x00cb, 0x45, 0x00 }, { 0x00cc, 0x49, 0x00 },
405 	{ 0x00cd, 0x49, 0x00 }, { 0x00ce, 0x49, 0x00 },
406 	{ 0x00cf, 0x49, 0x00 }, { 0x00d1, 0xa5, 0x00 },
407 	{ 0x00d2, 0x4f, 0x00 }, { 0x00d3, 0x4f, 0x00 },
408 	{ 0x00d4, 0x4f, 0x00 }, { 0x00d6, 0x99, 0x00 },
409 	{ 0x00d9, 0x55, 0x00 }, { 0x00da, 0x55, 0x00 },
410 	{ 0x00db, 0x55, 0x00 }, { 0x00dc, 0x9a, 0x00 },
411 	{ 0x00df, 0xe1, 0x00 }, { 0x00e0, 0x85, 0x00 },
412 	{ 0x00e1, 0xa0, 0x00 }, { 0x00e2, 0x83, 0x00 },
413 	{ 0x00e4, 0x84, 0x00 }, { 0x00e5, 0x86, 0x00 },
414 	{ 0x00e6, 0x91, 0x00 }, { 0x00e7, 0x87, 0x00 },
415 	{ 0x00e8, 0x8a, 0x00 }, { 0x00e9, 0x82, 0x00 },
416 	{ 0x00ea, 0x88, 0x01 }, { 0x00ec, 0x8d, 0x00 },
417 	{ 0x00ed, 0xa1, 0x00 }, { 0x00ee, 0x8c, 0x00 },
418 	{ 0x00ef, 0x8b, 0x00 }, { 0x00f0, 0xeb, 0x00 },
419 	{ 0x00f1, 0xa4, 0x00 }, { 0x00f2, 0x95, 0x00 },
420 	{ 0x00f3, 0xa2, 0x00 }, { 0x00f4, 0x93, 0x00 },
421 	{ 0x00f6, 0x94, 0x00 }, { 0x00f7, 0xf6, 0x00 },
422 	{ 0x00f8, 0xed, 0x00 }, { 0x00f9, 0x97, 0x00 },
423 	{ 0x00fa, 0xa3, 0x00 }, { 0x00fb, 0x96, 0x00 },
424 	{ 0x00fc, 0x81, 0x00 }, { 0x00ff, 0x98, 0x00 },
425 	{ 0x013f, 0x4c, 0x00 }, { 0x0140, 0x6c, 0x00 },
426 	{ 0x0192, 0x9f, 0x00 }, { 0x0393, 0xe2, 0x00 },
427 	{ 0x0398, 0xe9, 0x00 }, { 0x03a3, 0xe4, 0x00 },
428 	{ 0x03a6, 0xe8, 0x00 }, { 0x03a9, 0xea, 0x00 },
429 	{ 0x03b1, 0xe0, 0x01 }, { 0x03b4, 0xeb, 0x00 },
430 	{ 0x03b5, 0xee, 0x00 }, { 0x03bc, 0xe6, 0x00 },
431 	{ 0x03c0, 0xe3, 0x00 }, { 0x03c3, 0xe5, 0x00 },
432 	{ 0x03c4, 0xe7, 0x00 }, { 0x03c6, 0xed, 0x00 },
433 	{ 0x03d5, 0xed, 0x00 }, { 0x2010, 0x2d, 0x00 },
434 	{ 0x2014, 0x2d, 0x00 }, { 0x2018, 0x60, 0x00 },
435 	{ 0x2019, 0x27, 0x00 }, { 0x201c, 0x22, 0x00 },
436 	{ 0x201d, 0x22, 0x00 }, { 0x2022, 0x07, 0x00 },
437 	{ 0x203c, 0x13, 0x00 }, { 0x207f, 0xfc, 0x00 },
438 	{ 0x20a7, 0x9e, 0x00 }, { 0x20ac, 0xee, 0x00 },
439 	{ 0x2126, 0xea, 0x00 }, { 0x2190, 0x1b, 0x00 },
440 	{ 0x2191, 0x18, 0x00 }, { 0x2192, 0x1a, 0x00 },
441 	{ 0x2193, 0x19, 0x00 }, { 0x2194, 0x1d, 0x00 },
442 	{ 0x2195, 0x12, 0x00 }, { 0x21a8, 0x17, 0x00 },
443 	{ 0x2202, 0xeb, 0x00 }, { 0x2208, 0xee, 0x00 },
444 	{ 0x2211, 0xe4, 0x00 }, { 0x2212, 0x2d, 0x00 },
445 	{ 0x2219, 0xf9, 0x00 }, { 0x221a, 0xfb, 0x00 },
446 	{ 0x221e, 0xec, 0x00 }, { 0x221f, 0x1c, 0x00 },
447 	{ 0x2229, 0xef, 0x00 }, { 0x2248, 0xf7, 0x00 },
448 	{ 0x2261, 0xf0, 0x00 }, { 0x2264, 0xf3, 0x00 },
449 	{ 0x2265, 0xf2, 0x00 }, { 0x2302, 0x7f, 0x00 },
450 	{ 0x2310, 0xa9, 0x00 }, { 0x2320, 0xf4, 0x00 },
451 	{ 0x2321, 0xf5, 0x00 }, { 0x2500, 0xc4, 0x00 },
452 	{ 0x2502, 0xb3, 0x00 }, { 0x250c, 0xda, 0x00 },
453 	{ 0x2510, 0xbf, 0x00 }, { 0x2514, 0xc0, 0x00 },
454 	{ 0x2518, 0xd9, 0x00 }, { 0x251c, 0xc3, 0x00 },
455 	{ 0x2524, 0xb4, 0x00 }, { 0x252c, 0xc2, 0x00 },
456 	{ 0x2534, 0xc1, 0x00 }, { 0x253c, 0xc5, 0x00 },
457 	{ 0x2550, 0xcd, 0x00 }, { 0x2551, 0xba, 0x00 },
458 	{ 0x2552, 0xd5, 0x00 }, { 0x2553, 0xd6, 0x00 },
459 	{ 0x2554, 0xc9, 0x00 }, { 0x2555, 0xb8, 0x00 },
460 	{ 0x2556, 0xb7, 0x00 }, { 0x2557, 0xbb, 0x00 },
461 	{ 0x2558, 0xd4, 0x00 }, { 0x2559, 0xd3, 0x00 },
462 	{ 0x255a, 0xc8, 0x00 }, { 0x255b, 0xbe, 0x00 },
463 	{ 0x255c, 0xbd, 0x00 }, { 0x255d, 0xbc, 0x00 },
464 	{ 0x255e, 0xc6, 0x01 }, { 0x2560, 0xcc, 0x00 },
465 	{ 0x2561, 0xb5, 0x00 }, { 0x2562, 0xb6, 0x00 },
466 	{ 0x2563, 0xb9, 0x00 }, { 0x2564, 0xd1, 0x01 },
467 	{ 0x2566, 0xcb, 0x00 }, { 0x2567, 0xcf, 0x00 },
468 	{ 0x2568, 0xd0, 0x00 }, { 0x2569, 0xca, 0x00 },
469 	{ 0x256a, 0xd8, 0x00 }, { 0x256b, 0xd7, 0x00 },
470 	{ 0x256c, 0xce, 0x00 }, { 0x2580, 0xdf, 0x00 },
471 	{ 0x2584, 0xdc, 0x00 }, { 0x2588, 0xdb, 0x00 },
472 	{ 0x258c, 0xdd, 0x00 }, { 0x2590, 0xde, 0x00 },
473 	{ 0x2591, 0xb0, 0x02 }, { 0x25a0, 0xfe, 0x00 },
474 	{ 0x25ac, 0x16, 0x00 },
475 	{ 0x25ae, 0xdb, 0x00 }, { 0x25b2, 0x1e, 0x00 },
476 	{ 0x25ba, 0x10, 0x00 }, { 0x25bc, 0x1f, 0x00 },
477 	{ 0x25c4, 0x11, 0x00 }, { 0x25cb, 0x09, 0x00 },
478 	{ 0x25d8, 0x08, 0x00 }, { 0x25d9, 0x0a, 0x00 },
479 	{ 0x263a, 0x01, 0x01 }, { 0x263c, 0x0f, 0x00 },
480 	{ 0x2640, 0x0c, 0x00 }, { 0x2642, 0x0b, 0x00 },
481 	{ 0x2660, 0x06, 0x00 }, { 0x2663, 0x05, 0x00 },
482 	{ 0x2665, 0x03, 0x01 }, { 0x266a, 0x0d, 0x01 },
483 };
484 
485 static void
486 scteken_get_cp437(teken_char_t *c, int *attr)
487 {
488 	int min, mid, max;
489 
490 	min = 0;
491 	max = (sizeof(cp437table) / sizeof(struct unicp437)) - 1;
492 
493 	if (*c < cp437table[0].unicode_base ||
494 	    *c > cp437table[max].unicode_base + cp437table[max].length)
495 		goto bad;
496 
497 	while (max >= min) {
498 		mid = (min + max) / 2;
499 		if (*c < cp437table[mid].unicode_base) {
500 			max = mid - 1;
501 		} else if (*c > cp437table[mid].unicode_base +
502 		    cp437table[mid].length) {
503 			min = mid + 1;
504 		} else {
505 			*c -= cp437table[mid].unicode_base;
506 			*c += cp437table[mid].cp437_base;
507 			return;
508 		}
509 	}
510 bad:
511 	/* Character not present in CP437. */
512 	*attr = (FG_RED|BG_BLACK) << 8;
513 	*c = '?';
514 }
515 #endif /* TEKEN_UTF8 */
516 
517 static void
518 scteken_putchar(void *arg, const teken_pos_t *tp, teken_char_t c,
519     const teken_attr_t *a)
520 {
521 	scr_stat *scp = arg;
522 	u_char *map;
523 	u_char ch;
524 	vm_offset_t p;
525 	int cursor, attr;
526 
527 	/*
528 	 * No support for printing right hand sides for CJK fullwidth
529 	 * characters. Simply print a space and assume that the left
530 	 * hand side describes the entire character.
531 	 */
532 	attr = scteken_te_to_sc_attr(a) << 8;
533 	if (a->ta_format & TF_CJK_RIGHT)
534 		c = ' ';
535 #ifdef TEKEN_UTF8
536 	scteken_get_cp437(&c, &attr);
537 #endif /* TEKEN_UTF8 */
538 	ch = c;
539 
540 	map = scp->sc->scr_map;
541 
542 	cursor = tp->tp_row * scp->xsize + tp->tp_col;
543 	p = sc_vtb_pointer(&scp->vtb, cursor);
544 	sc_vtb_putchar(&scp->vtb, p, map[ch], attr);
545 
546 	mark_for_update(scp, cursor);
547 	/*
548 	 * XXX: Why do we need this? Only marking `cursor' should be
549 	 * enough. Without this line, we get artifacts.
550 	 */
551 	mark_for_update(scp, imin(cursor + 1, scp->xsize * scp->ysize - 1));
552 }
553 
554 static void
555 scteken_fill(void *arg, const teken_rect_t *r, teken_char_t c,
556     const teken_attr_t *a)
557 {
558 	scr_stat *scp = arg;
559 	u_char *map;
560 	u_char ch;
561 	unsigned int width;
562 	int attr, row;
563 
564 	attr = scteken_te_to_sc_attr(a) << 8;
565 #ifdef TEKEN_UTF8
566 	scteken_get_cp437(&c, &attr);
567 #endif /* TEKEN_UTF8 */
568 	ch = c;
569 
570 	map = scp->sc->scr_map;
571 
572 	if (r->tr_begin.tp_col == 0 && r->tr_end.tp_col == scp->xsize) {
573 		/* Single contiguous region to fill. */
574 		sc_vtb_erase(&scp->vtb, r->tr_begin.tp_row * scp->xsize,
575 		    (r->tr_end.tp_row - r->tr_begin.tp_row) * scp->xsize,
576 		    map[ch], attr);
577 	} else {
578 		/* Fill display line by line. */
579 		width = r->tr_end.tp_col - r->tr_begin.tp_col;
580 
581 		for (row = r->tr_begin.tp_row; row < r->tr_end.tp_row; row++) {
582 			sc_vtb_erase(&scp->vtb, r->tr_begin.tp_row *
583 			    scp->xsize + r->tr_begin.tp_col,
584 			    width, map[ch], attr);
585 		}
586 	}
587 
588 	/* Mark begin and end positions to be refreshed. */
589 	mark_for_update(scp,
590 	    r->tr_begin.tp_row * scp->xsize + r->tr_begin.tp_col);
591 	mark_for_update(scp,
592 	    (r->tr_end.tp_row - 1) * scp->xsize + (r->tr_end.tp_col - 1));
593 	sc_remove_cutmarking(scp);
594 }
595 
596 static void
597 scteken_copy(void *arg, const teken_rect_t *r, const teken_pos_t *p)
598 {
599 	scr_stat *scp = arg;
600 	unsigned int width;
601 	int src, dst, end;
602 
603 #ifndef SC_NO_HISTORY
604 	/*
605 	 * We count a line of input as history if we perform a copy of
606 	 * one whole line upward. In other words: if a line of text gets
607 	 * overwritten by a rectangle that's right below it.
608 	 */
609 	if (scp->history != NULL &&
610 	    r->tr_begin.tp_col == 0 && r->tr_end.tp_col == scp->xsize &&
611 	    r->tr_begin.tp_row == p->tp_row + 1) {
612 		sc_hist_save_one_line(scp, p->tp_row);
613 	}
614 #endif
615 
616 	if (r->tr_begin.tp_col == 0 && r->tr_end.tp_col == scp->xsize) {
617 		/* Single contiguous region to copy. */
618 		sc_vtb_move(&scp->vtb, r->tr_begin.tp_row * scp->xsize,
619 		    p->tp_row * scp->xsize,
620 		    (r->tr_end.tp_row - r->tr_begin.tp_row) * scp->xsize);
621 	} else {
622 		/* Copy line by line. */
623 		width = r->tr_end.tp_col - r->tr_begin.tp_col;
624 
625 		if (p->tp_row < r->tr_begin.tp_row) {
626 			/* Copy from top to bottom. */
627 			src = r->tr_begin.tp_row * scp->xsize +
628 			    r->tr_begin.tp_col;
629 			end = r->tr_end.tp_row * scp->xsize +
630 			    r->tr_end.tp_col;
631 			dst = p->tp_row * scp->xsize + p->tp_col;
632 
633 			while (src < end) {
634 				sc_vtb_move(&scp->vtb, src, dst, width);
635 
636 				src += scp->xsize;
637 				dst += scp->xsize;
638 			}
639 		} else {
640 			/* Copy from bottom to top. */
641 			src = (r->tr_end.tp_row - 1) * scp->xsize +
642 			    r->tr_begin.tp_col;
643 			end = r->tr_begin.tp_row * scp->xsize +
644 			    r->tr_begin.tp_col;
645 			dst = (p->tp_row + r->tr_end.tp_row -
646 			    r->tr_begin.tp_row - 1) * scp->xsize + p->tp_col;
647 
648 			while (src >= end) {
649 				sc_vtb_move(&scp->vtb, src, dst, width);
650 
651 				src -= scp->xsize;
652 				dst -= scp->xsize;
653 			}
654 		}
655 	}
656 
657 	/* Mark begin and end positions to be refreshed. */
658 	mark_for_update(scp,
659 	    p->tp_row * scp->xsize + p->tp_col);
660 	mark_for_update(scp,
661 	    (p->tp_row + r->tr_end.tp_row - r->tr_begin.tp_row - 1) *
662 	    scp->xsize +
663 	    (p->tp_col + r->tr_end.tp_col - r->tr_begin.tp_col - 1));
664 	sc_remove_cutmarking(scp);
665 }
666 
667 static void
668 scteken_param(void *arg, int cmd, unsigned int value)
669 {
670 	scr_stat *scp = arg;
671 
672 	switch (cmd) {
673 	case TP_SHOWCURSOR:
674 		if (value) {
675 			sc_change_cursor_shape(scp,
676 			    CONS_RESET_CURSOR|CONS_LOCAL_CURSOR, -1, -1);
677 		} else {
678 			sc_change_cursor_shape(scp,
679 			    CONS_HIDDEN_CURSOR|CONS_LOCAL_CURSOR, -1, -1);
680 		}
681 		break;
682 	case TP_SWITCHVT:
683 		sc_switch_scr(scp->sc, value);
684 		break;
685 	case TP_SETBELLPD:
686 		scp->bell_pitch = TP_SETBELLPD_PITCH(value);
687 		scp->bell_duration = TP_SETBELLPD_DURATION(value);
688 		break;
689 	case TP_MOUSE:
690 		scp->mouse_level = value;
691 		break;
692 	}
693 }
694 
695 static void
696 scteken_respond(void *arg, const void *buf, size_t len)
697 {
698 	scr_stat *scp = arg;
699 
700 	sc_respond(scp, buf, len, 0);
701 }
702