xref: /freebsd/sys/dev/syscons/scterm-teken.c (revision 315ee00f)
1 /*-
2  * SPDX-License-Identifier: BSD-2-Clause
3  *
4  * Copyright (c) 1999 Kazutaka YOKOTA <yokota@zodiac.mech.utsunomiya-u.ac.jp>
5  * All rights reserved.
6  *
7  * Copyright (c) 2008-2009 Ed Schouten <ed@FreeBSD.org>
8  * All rights reserved.
9  *
10  * Redistribution and use in source and binary forms, with or without
11  * modification, are permitted provided that the following conditions
12  * are met:
13  * 1. Redistributions of source code must retain the above copyright
14  *    notice, this list of conditions and the following disclaimer as
15  *    the first lines of this file unmodified.
16  * 2. Redistributions in binary form must reproduce the above copyright
17  *    notice, this list of conditions and the following disclaimer in the
18  *    documentation and/or other materials provided with the distribution.
19  *
20  * THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR
21  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
22  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
23  * IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT,
24  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
25  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
26  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
27  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
28  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
29  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30  */
31 
32 #include <sys/cdefs.h>
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(__powerpc__)
44 #include <machine/sc_machdep.h>
45 #else
46 #include <machine/pc/display.h>
47 #endif
48 
49 #include <dev/syscons/syscons.h>
50 
51 #include <teken/teken.h>
52 
53 static void scteken_sc_to_te_attr(unsigned char, teken_attr_t *);
54 static int scteken_te_to_sc_attr(const teken_attr_t *);
55 
56 static sc_term_init_t		scteken_init;
57 static sc_term_term_t		scteken_term;
58 static sc_term_puts_t		scteken_puts;
59 static sc_term_ioctl_t		scteken_ioctl;
60 static sc_term_default_attr_t	scteken_default_attr;
61 static sc_term_clear_t		scteken_clear;
62 static sc_term_input_t		scteken_input;
63 static sc_term_fkeystr_t	scteken_fkeystr;
64 static sc_term_sync_t		scteken_sync;
65 static void			scteken_nop(void);
66 
67 typedef struct {
68 	teken_t		ts_teken;
69 	int		ts_busy;
70 } teken_stat;
71 
72 static teken_stat	reserved_teken_stat;
73 
74 static void scteken_sync_internal(scr_stat *, teken_stat *);
75 
76 static sc_term_sw_t sc_term_scteken = {
77 	{ NULL, NULL },
78 	"scteken",			/* emulator name */
79 	"teken terminal",		/* description */
80 	"*",				/* matching renderer */
81 	sizeof(teken_stat),		/* softc size */
82 	0,
83 	scteken_init,
84 	scteken_term,
85 	scteken_puts,
86 	scteken_ioctl,
87 	(sc_term_reset_t *)scteken_nop,
88 	scteken_default_attr,
89 	scteken_clear,
90 	(sc_term_notify_t *)scteken_nop,
91 	scteken_input,
92 	scteken_fkeystr,
93 	scteken_sync,
94 };
95 
96 SCTERM_MODULE(scteken, sc_term_scteken);
97 
98 static tf_bell_t	scteken_bell;
99 static tf_cursor_t	scteken_cursor;
100 static tf_putchar_t	scteken_putchar;
101 static tf_fill_t	scteken_fill;
102 static tf_copy_t	scteken_copy;
103 static tf_param_t	scteken_param;
104 static tf_respond_t	scteken_respond;
105 
106 static const teken_funcs_t scteken_funcs = {
107 	.tf_bell	= scteken_bell,
108 	.tf_cursor	= scteken_cursor,
109 	.tf_putchar	= scteken_putchar,
110 	.tf_fill	= scteken_fill,
111 	.tf_copy	= scteken_copy,
112 	.tf_param	= scteken_param,
113 	.tf_respond	= scteken_respond,
114 };
115 
116 static int
117 scteken_init(scr_stat *scp, void **softc, int code)
118 {
119 	teken_stat *ts;
120 	teken_attr_t ta;
121 
122 	if (*softc == NULL) {
123 		if (reserved_teken_stat.ts_busy)
124 			return (EINVAL);
125 		*softc = &reserved_teken_stat;
126 	}
127 	ts = *softc;
128 
129 	switch (code) {
130 	case SC_TE_COLD_INIT:
131 		++sc_term_scteken.te_refcount;
132 		ts->ts_busy = 1;
133 		/* FALLTHROUGH */
134 	case SC_TE_WARM_INIT:
135 		ta = *teken_get_defattr(&ts->ts_teken);
136 		teken_init(&ts->ts_teken, &scteken_funcs, scp);
137 		teken_set_defattr(&ts->ts_teken, &ta);
138 #ifndef TEKEN_UTF8
139 		teken_set_8bit(&ts->ts_teken);
140 #endif /* !TEKEN_UTF8 */
141 #ifdef TEKEN_CONS25
142 		teken_set_cons25(&ts->ts_teken);
143 #endif /* TEKEN_CONS25 */
144 		teken_set_cons25keys(&ts->ts_teken);
145 		scteken_sync_internal(scp, ts);
146 		break;
147 	}
148 
149 	return (0);
150 }
151 
152 static int
153 scteken_term(scr_stat *scp, void **softc)
154 {
155 
156 	if (*softc == &reserved_teken_stat) {
157 		*softc = NULL;
158 		reserved_teken_stat.ts_busy = 0;
159 	}
160 	--sc_term_scteken.te_refcount;
161 
162 	return (0);
163 }
164 
165 static void
166 scteken_puts(scr_stat *scp, u_char *buf, int len)
167 {
168 	teken_stat *ts = scp->ts;
169 
170 	scp->sc->write_in_progress++;
171 	teken_input(&ts->ts_teken, buf, len);
172 	scp->sc->write_in_progress--;
173 }
174 
175 static int
176 scteken_ioctl(scr_stat *scp, struct tty *tp, u_long cmd, caddr_t data,
177 	     struct thread *td)
178 {
179 	teken_stat *ts = scp->ts;
180 	vid_info_t *vi;
181 	int attr;
182 
183 	switch (cmd) {
184 	case GIO_ATTR:      	/* get current attributes */
185 		*(int*)data =
186 		    scteken_te_to_sc_attr(teken_get_curattr(&ts->ts_teken));
187 		return (0);
188 	case CONS_GETINFO:  	/* get current (virtual) console info */
189 		vi = (vid_info_t *)data;
190 		if (vi->size != sizeof(struct vid_info))
191 			return EINVAL;
192 
193 		attr = scteken_te_to_sc_attr(teken_get_defattr(&ts->ts_teken));
194 		vi->mv_norm.fore = attr & 0x0f;
195 		vi->mv_norm.back = (attr >> 4) & 0x0f;
196 		vi->mv_rev.fore = vi->mv_norm.back;
197 		vi->mv_rev.back = vi->mv_norm.fore;
198 		/*
199 		 * The other fields are filled by the upper routine. XXX
200 		 */
201 		return (ENOIOCTL);
202 	}
203 
204 	return (ENOIOCTL);
205 }
206 
207 static void
208 scteken_default_attr(scr_stat *scp, int color, int rev_color)
209 {
210 	teken_stat *ts = scp->ts;
211 	teken_attr_t ta;
212 
213 	scteken_sc_to_te_attr(color, &ta);
214 	teken_set_defattr(&ts->ts_teken, &ta);
215 }
216 
217 static void
218 scteken_clear(scr_stat *scp)
219 {
220 	teken_stat *ts = scp->ts;
221 
222 	sc_move_cursor(scp, 0, 0);
223 	scteken_sync_internal(scp, ts);
224 	sc_vtb_clear(&scp->vtb, scp->sc->scr_map[0x20],
225 		     scteken_te_to_sc_attr(teken_get_curattr(&ts->ts_teken))
226 		     << 8);
227 	mark_all(scp);
228 }
229 
230 static int
231 scteken_input(scr_stat *scp, int c, struct tty *tp)
232 {
233 
234 	return FALSE;
235 }
236 
237 static const char *
238 scteken_fkeystr(scr_stat *scp, int c)
239 {
240 	teken_stat *ts = scp->ts;
241 	unsigned int k;
242 
243 	switch (c) {
244 	case FKEY | F(1):  case FKEY | F(2):  case FKEY | F(3):
245 	case FKEY | F(4):  case FKEY | F(5):  case FKEY | F(6):
246 	case FKEY | F(7):  case FKEY | F(8):  case FKEY | F(9):
247 	case FKEY | F(10): case FKEY | F(11): case FKEY | F(12):
248 		k = TKEY_F1 + c - (FKEY | F(1));
249 		break;
250 	case FKEY | F(49):
251 		k = TKEY_HOME;
252 		break;
253 	case FKEY | F(50):
254 		k = TKEY_UP;
255 		break;
256 	case FKEY | F(51):
257 		k = TKEY_PAGE_UP;
258 		break;
259 	case FKEY | F(53):
260 		k = TKEY_LEFT;
261 		break;
262 	case FKEY | F(55):
263 		k = TKEY_RIGHT;
264 		break;
265 	case FKEY | F(57):
266 		k = TKEY_END;
267 		break;
268 	case FKEY | F(58):
269 		k = TKEY_DOWN;
270 		break;
271 	case FKEY | F(59):
272 		k = TKEY_PAGE_DOWN;
273 		break;
274 	case FKEY | F(60):
275 		k = TKEY_INSERT;
276 		break;
277 	case FKEY | F(61):
278 		k = TKEY_DELETE;
279 		break;
280 	default:
281 		return (NULL);
282 	}
283 
284 	return (teken_get_sequence(&ts->ts_teken, k));
285 }
286 
287 static void
288 scteken_sync_internal(scr_stat *scp, teken_stat *ts)
289 {
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_sync(scr_stat *scp)
302 {
303 	scteken_sync_internal(scp, scp->ts);
304 }
305 
306 static void
307 scteken_nop(void)
308 {
309 
310 }
311 
312 /*
313  * libteken routines.
314  */
315 
316 static const teken_color_t sc_to_te_color[] = {
317 	TC_BLACK,     TC_BLUE,         TC_GREEN,     TC_CYAN,
318 	TC_RED,       TC_MAGENTA,      TC_YELLOW,    TC_WHITE,
319 };
320 
321 static const unsigned char te_to_sc_color[] = {
322 	FG_BLACK,     FG_RED,          FG_GREEN,     FG_BROWN,
323 	FG_BLUE,      FG_MAGENTA,      FG_CYAN,      FG_LIGHTGREY,
324 };
325 
326 static void
327 scteken_sc_to_te_attr(unsigned char color, teken_attr_t *a)
328 {
329 
330 	/*
331 	 * Conversions of attrs are not reversible.  Since sc attrs are
332 	 * pure colors in the simplest mode (16-color graphics) and the
333 	 * API is too deficient to tell us the mode, always convert to
334 	 * pure colors.  The conversion is essentially the identity except
335 	 * for reordering the non-brightness bits in the 2 color numbers.
336 	 */
337 	a->ta_format = 0;
338 	a->ta_fgcolor = sc_to_te_color[color & 7] | (color & 8);
339 	a->ta_bgcolor = sc_to_te_color[(color >> 4) & 7] | ((color >> 4) & 8);
340 }
341 
342 static int
343 scteken_te_to_sc_attr(const teken_attr_t *a)
344 {
345 	int attr;
346 	teken_color_t fg, bg;
347 
348 	if (a->ta_format & TF_REVERSE) {
349 		fg = a->ta_bgcolor;
350 		bg = a->ta_fgcolor;
351 	} else {
352 		fg = a->ta_fgcolor;
353 		bg = a->ta_bgcolor;
354 	}
355 	if (fg >= 16)
356 		fg = teken_256to16(fg);
357 	if (bg >= 16)
358 		bg = teken_256to16(bg);
359 	attr = te_to_sc_color[fg & 7] | (fg & 8) |
360 	    ((te_to_sc_color[bg & 7] | (bg & 8)) << 4);
361 
362 	/* XXX: underline mapping for Hercules adapter can be better. */
363 	if (a->ta_format & (TF_BOLD | TF_UNDERLINE))
364 		attr ^= 8;
365 	if (a->ta_format & TF_BLINK)
366 		attr ^= 0x80;
367 
368 	return (attr);
369 }
370 
371 static void
372 scteken_bell(void *arg)
373 {
374 	scr_stat *scp = arg;
375 
376 	sc_bell(scp, scp->bell_pitch, scp->bell_duration);
377 }
378 
379 static void
380 scteken_cursor(void *arg, const teken_pos_t *p)
381 {
382 	scr_stat *scp = arg;
383 
384 	sc_move_cursor(scp, p->tp_col, p->tp_row);
385 }
386 
387 #ifdef TEKEN_UTF8
388 struct unicp437 {
389 	uint16_t	unicode_base;
390 	uint8_t		cp437_base;
391 	uint8_t		length;
392 };
393 
394 static const struct unicp437 cp437table[] = {
395 	{ 0x0020, 0x20, 0x5e }, { 0x00a0, 0x20, 0x00 },
396 	{ 0x00a1, 0xad, 0x00 }, { 0x00a2, 0x9b, 0x00 },
397 	{ 0x00a3, 0x9c, 0x00 }, { 0x00a5, 0x9d, 0x00 },
398 	{ 0x00a7, 0x15, 0x00 }, { 0x00aa, 0xa6, 0x00 },
399 	{ 0x00ab, 0xae, 0x00 }, { 0x00ac, 0xaa, 0x00 },
400 	{ 0x00b0, 0xf8, 0x00 }, { 0x00b1, 0xf1, 0x00 },
401 	{ 0x00b2, 0xfd, 0x00 }, { 0x00b5, 0xe6, 0x00 },
402 	{ 0x00b6, 0x14, 0x00 }, { 0x00b7, 0xfa, 0x00 },
403 	{ 0x00ba, 0xa7, 0x00 }, { 0x00bb, 0xaf, 0x00 },
404 	{ 0x00bc, 0xac, 0x00 }, { 0x00bd, 0xab, 0x00 },
405 	{ 0x00bf, 0xa8, 0x00 }, { 0x00c0, 0x41, 0x00 },
406 	{ 0x00c1, 0x41, 0x00 }, { 0x00c2, 0x41, 0x00 },
407 	{ 0x00c4, 0x8e, 0x01 }, { 0x00c6, 0x92, 0x00 },
408 	{ 0x00c7, 0x80, 0x00 }, { 0x00c8, 0x45, 0x00 },
409 	{ 0x00c9, 0x90, 0x00 }, { 0x00ca, 0x45, 0x00 },
410 	{ 0x00cb, 0x45, 0x00 }, { 0x00cc, 0x49, 0x00 },
411 	{ 0x00cd, 0x49, 0x00 }, { 0x00ce, 0x49, 0x00 },
412 	{ 0x00cf, 0x49, 0x00 }, { 0x00d1, 0xa5, 0x00 },
413 	{ 0x00d2, 0x4f, 0x00 }, { 0x00d3, 0x4f, 0x00 },
414 	{ 0x00d4, 0x4f, 0x00 }, { 0x00d6, 0x99, 0x00 },
415 	{ 0x00d9, 0x55, 0x00 }, { 0x00da, 0x55, 0x00 },
416 	{ 0x00db, 0x55, 0x00 }, { 0x00dc, 0x9a, 0x00 },
417 	{ 0x00df, 0xe1, 0x00 }, { 0x00e0, 0x85, 0x00 },
418 	{ 0x00e1, 0xa0, 0x00 }, { 0x00e2, 0x83, 0x00 },
419 	{ 0x00e4, 0x84, 0x00 }, { 0x00e5, 0x86, 0x00 },
420 	{ 0x00e6, 0x91, 0x00 }, { 0x00e7, 0x87, 0x00 },
421 	{ 0x00e8, 0x8a, 0x00 }, { 0x00e9, 0x82, 0x00 },
422 	{ 0x00ea, 0x88, 0x01 }, { 0x00ec, 0x8d, 0x00 },
423 	{ 0x00ed, 0xa1, 0x00 }, { 0x00ee, 0x8c, 0x00 },
424 	{ 0x00ef, 0x8b, 0x00 }, { 0x00f0, 0xeb, 0x00 },
425 	{ 0x00f1, 0xa4, 0x00 }, { 0x00f2, 0x95, 0x00 },
426 	{ 0x00f3, 0xa2, 0x00 }, { 0x00f4, 0x93, 0x00 },
427 	{ 0x00f6, 0x94, 0x00 }, { 0x00f7, 0xf6, 0x00 },
428 	{ 0x00f8, 0xed, 0x00 }, { 0x00f9, 0x97, 0x00 },
429 	{ 0x00fa, 0xa3, 0x00 }, { 0x00fb, 0x96, 0x00 },
430 	{ 0x00fc, 0x81, 0x00 }, { 0x00ff, 0x98, 0x00 },
431 	{ 0x013f, 0x4c, 0x00 }, { 0x0140, 0x6c, 0x00 },
432 	{ 0x0192, 0x9f, 0x00 }, { 0x0393, 0xe2, 0x00 },
433 	{ 0x0398, 0xe9, 0x00 }, { 0x03a3, 0xe4, 0x00 },
434 	{ 0x03a6, 0xe8, 0x00 }, { 0x03a9, 0xea, 0x00 },
435 	{ 0x03b1, 0xe0, 0x01 }, { 0x03b4, 0xeb, 0x00 },
436 	{ 0x03b5, 0xee, 0x00 }, { 0x03bc, 0xe6, 0x00 },
437 	{ 0x03c0, 0xe3, 0x00 }, { 0x03c3, 0xe5, 0x00 },
438 	{ 0x03c4, 0xe7, 0x00 }, { 0x03c6, 0xed, 0x00 },
439 	{ 0x03d5, 0xed, 0x00 }, { 0x2010, 0x2d, 0x00 },
440 	{ 0x2014, 0x2d, 0x00 }, { 0x2018, 0x60, 0x00 },
441 	{ 0x2019, 0x27, 0x00 }, { 0x201c, 0x22, 0x00 },
442 	{ 0x201d, 0x22, 0x00 }, { 0x2022, 0x07, 0x00 },
443 	{ 0x203c, 0x13, 0x00 }, { 0x207f, 0xfc, 0x00 },
444 	{ 0x20a7, 0x9e, 0x00 }, { 0x20ac, 0xee, 0x00 },
445 	{ 0x2126, 0xea, 0x00 }, { 0x2190, 0x1b, 0x00 },
446 	{ 0x2191, 0x18, 0x00 }, { 0x2192, 0x1a, 0x00 },
447 	{ 0x2193, 0x19, 0x00 }, { 0x2194, 0x1d, 0x00 },
448 	{ 0x2195, 0x12, 0x00 }, { 0x21a8, 0x17, 0x00 },
449 	{ 0x2202, 0xeb, 0x00 }, { 0x2208, 0xee, 0x00 },
450 	{ 0x2211, 0xe4, 0x00 }, { 0x2212, 0x2d, 0x00 },
451 	{ 0x2219, 0xf9, 0x00 }, { 0x221a, 0xfb, 0x00 },
452 	{ 0x221e, 0xec, 0x00 }, { 0x221f, 0x1c, 0x00 },
453 	{ 0x2229, 0xef, 0x00 }, { 0x2248, 0xf7, 0x00 },
454 	{ 0x2261, 0xf0, 0x00 }, { 0x2264, 0xf3, 0x00 },
455 	{ 0x2265, 0xf2, 0x00 }, { 0x2302, 0x7f, 0x00 },
456 	{ 0x2310, 0xa9, 0x00 }, { 0x2320, 0xf4, 0x00 },
457 	{ 0x2321, 0xf5, 0x00 }, { 0x2500, 0xc4, 0x00 },
458 	{ 0x2502, 0xb3, 0x00 }, { 0x250c, 0xda, 0x00 },
459 	{ 0x2510, 0xbf, 0x00 }, { 0x2514, 0xc0, 0x00 },
460 	{ 0x2518, 0xd9, 0x00 }, { 0x251c, 0xc3, 0x00 },
461 	{ 0x2524, 0xb4, 0x00 }, { 0x252c, 0xc2, 0x00 },
462 	{ 0x2534, 0xc1, 0x00 }, { 0x253c, 0xc5, 0x00 },
463 	{ 0x2550, 0xcd, 0x00 }, { 0x2551, 0xba, 0x00 },
464 	{ 0x2552, 0xd5, 0x00 }, { 0x2553, 0xd6, 0x00 },
465 	{ 0x2554, 0xc9, 0x00 }, { 0x2555, 0xb8, 0x00 },
466 	{ 0x2556, 0xb7, 0x00 }, { 0x2557, 0xbb, 0x00 },
467 	{ 0x2558, 0xd4, 0x00 }, { 0x2559, 0xd3, 0x00 },
468 	{ 0x255a, 0xc8, 0x00 }, { 0x255b, 0xbe, 0x00 },
469 	{ 0x255c, 0xbd, 0x00 }, { 0x255d, 0xbc, 0x00 },
470 	{ 0x255e, 0xc6, 0x01 }, { 0x2560, 0xcc, 0x00 },
471 	{ 0x2561, 0xb5, 0x00 }, { 0x2562, 0xb6, 0x00 },
472 	{ 0x2563, 0xb9, 0x00 }, { 0x2564, 0xd1, 0x01 },
473 	{ 0x2566, 0xcb, 0x00 }, { 0x2567, 0xcf, 0x00 },
474 	{ 0x2568, 0xd0, 0x00 }, { 0x2569, 0xca, 0x00 },
475 	{ 0x256a, 0xd8, 0x00 }, { 0x256b, 0xd7, 0x00 },
476 	{ 0x256c, 0xce, 0x00 }, { 0x2580, 0xdf, 0x00 },
477 	{ 0x2584, 0xdc, 0x00 }, { 0x2588, 0xdb, 0x00 },
478 	{ 0x258c, 0xdd, 0x00 }, { 0x2590, 0xde, 0x00 },
479 	{ 0x2591, 0xb0, 0x02 }, { 0x25a0, 0xfe, 0x00 },
480 	{ 0x25ac, 0x16, 0x00 },
481 	{ 0x25ae, 0xdb, 0x00 }, { 0x25b2, 0x1e, 0x00 },
482 	{ 0x25ba, 0x10, 0x00 }, { 0x25bc, 0x1f, 0x00 },
483 	{ 0x25c4, 0x11, 0x00 }, { 0x25cb, 0x09, 0x00 },
484 	{ 0x25d8, 0x08, 0x00 }, { 0x25d9, 0x0a, 0x00 },
485 	{ 0x263a, 0x01, 0x01 }, { 0x263c, 0x0f, 0x00 },
486 	{ 0x2640, 0x0c, 0x00 }, { 0x2642, 0x0b, 0x00 },
487 	{ 0x2660, 0x06, 0x00 }, { 0x2663, 0x05, 0x00 },
488 	{ 0x2665, 0x03, 0x01 }, { 0x266a, 0x0d, 0x01 },
489 };
490 
491 static void
492 scteken_get_cp437(teken_char_t *c, int *attr)
493 {
494 	int min, mid, max;
495 
496 	min = 0;
497 	max = (sizeof(cp437table) / sizeof(struct unicp437)) - 1;
498 
499 	if (*c < cp437table[0].unicode_base ||
500 	    *c > cp437table[max].unicode_base + cp437table[max].length)
501 		goto bad;
502 
503 	while (max >= min) {
504 		mid = (min + max) / 2;
505 		if (*c < cp437table[mid].unicode_base) {
506 			max = mid - 1;
507 		} else if (*c > cp437table[mid].unicode_base +
508 		    cp437table[mid].length) {
509 			min = mid + 1;
510 		} else {
511 			*c -= cp437table[mid].unicode_base;
512 			*c += cp437table[mid].cp437_base;
513 			return;
514 		}
515 	}
516 bad:
517 	/* Character not present in CP437. */
518 	*attr = (FG_RED|BG_BLACK) << 8;
519 	*c = '?';
520 }
521 #endif /* TEKEN_UTF8 */
522 
523 static void
524 scteken_putchar(void *arg, const teken_pos_t *tp, teken_char_t c,
525     const teken_attr_t *a)
526 {
527 	scr_stat *scp = arg;
528 	u_char *map;
529 	u_char ch;
530 	vm_offset_t p;
531 	int cursor, attr;
532 
533 	/*
534 	 * No support for printing right hand sides for CJK fullwidth
535 	 * characters. Simply print a space and assume that the left
536 	 * hand side describes the entire character.
537 	 */
538 	attr = scteken_te_to_sc_attr(a) << 8;
539 	if (a->ta_format & TF_CJK_RIGHT)
540 		c = ' ';
541 #ifdef TEKEN_UTF8
542 	scteken_get_cp437(&c, &attr);
543 #endif /* TEKEN_UTF8 */
544 	ch = c;
545 
546 	map = scp->sc->scr_map;
547 
548 	cursor = tp->tp_row * scp->xsize + tp->tp_col;
549 	p = sc_vtb_pointer(&scp->vtb, cursor);
550 	sc_vtb_putchar(&scp->vtb, p, map[ch], attr);
551 
552 	mark_for_update(scp, cursor);
553 	/*
554 	 * XXX: Why do we need this? Only marking `cursor' should be
555 	 * enough. Without this line, we get artifacts.
556 	 */
557 	mark_for_update(scp, imin(cursor + 1, scp->xsize * scp->ysize - 1));
558 }
559 
560 static void
561 scteken_fill(void *arg, const teken_rect_t *r, teken_char_t c,
562     const teken_attr_t *a)
563 {
564 	scr_stat *scp = arg;
565 	u_char *map;
566 	u_char ch;
567 	unsigned int width;
568 	int attr, row;
569 
570 	attr = scteken_te_to_sc_attr(a) << 8;
571 #ifdef TEKEN_UTF8
572 	scteken_get_cp437(&c, &attr);
573 #endif /* TEKEN_UTF8 */
574 	ch = c;
575 
576 	map = scp->sc->scr_map;
577 
578 	if (r->tr_begin.tp_col == 0 && r->tr_end.tp_col == scp->xsize) {
579 		/* Single contiguous region to fill. */
580 		sc_vtb_erase(&scp->vtb, r->tr_begin.tp_row * scp->xsize,
581 		    (r->tr_end.tp_row - r->tr_begin.tp_row) * scp->xsize,
582 		    map[ch], attr);
583 	} else {
584 		/* Fill display line by line. */
585 		width = r->tr_end.tp_col - r->tr_begin.tp_col;
586 
587 		for (row = r->tr_begin.tp_row; row < r->tr_end.tp_row; row++) {
588 			sc_vtb_erase(&scp->vtb, r->tr_begin.tp_row *
589 			    scp->xsize + r->tr_begin.tp_col,
590 			    width, map[ch], attr);
591 		}
592 	}
593 
594 	/* Mark begin and end positions to be refreshed. */
595 	mark_for_update(scp,
596 	    r->tr_begin.tp_row * scp->xsize + r->tr_begin.tp_col);
597 	mark_for_update(scp,
598 	    (r->tr_end.tp_row - 1) * scp->xsize + (r->tr_end.tp_col - 1));
599 	sc_remove_cutmarking(scp);
600 }
601 
602 static void
603 scteken_copy(void *arg, const teken_rect_t *r, const teken_pos_t *p)
604 {
605 	scr_stat *scp = arg;
606 	unsigned int width;
607 	int src, dst, end;
608 
609 #ifndef SC_NO_HISTORY
610 	/*
611 	 * We count a line of input as history if we perform a copy of
612 	 * one whole line upward. In other words: if a line of text gets
613 	 * overwritten by a rectangle that's right below it.
614 	 */
615 	if (scp->history != NULL &&
616 	    r->tr_begin.tp_col == 0 && r->tr_end.tp_col == scp->xsize &&
617 	    r->tr_begin.tp_row == p->tp_row + 1) {
618 		sc_hist_save_one_line(scp, p->tp_row);
619 	}
620 #endif
621 
622 	if (r->tr_begin.tp_col == 0 && r->tr_end.tp_col == scp->xsize) {
623 		/* Single contiguous region to copy. */
624 		sc_vtb_move(&scp->vtb, r->tr_begin.tp_row * scp->xsize,
625 		    p->tp_row * scp->xsize,
626 		    (r->tr_end.tp_row - r->tr_begin.tp_row) * scp->xsize);
627 	} else {
628 		/* Copy line by line. */
629 		width = r->tr_end.tp_col - r->tr_begin.tp_col;
630 
631 		if (p->tp_row < r->tr_begin.tp_row) {
632 			/* Copy from top to bottom. */
633 			src = r->tr_begin.tp_row * scp->xsize +
634 			    r->tr_begin.tp_col;
635 			end = r->tr_end.tp_row * scp->xsize +
636 			    r->tr_end.tp_col;
637 			dst = p->tp_row * scp->xsize + p->tp_col;
638 
639 			while (src < end) {
640 				sc_vtb_move(&scp->vtb, src, dst, width);
641 
642 				src += scp->xsize;
643 				dst += scp->xsize;
644 			}
645 		} else {
646 			/* Copy from bottom to top. */
647 			src = (r->tr_end.tp_row - 1) * scp->xsize +
648 			    r->tr_begin.tp_col;
649 			end = r->tr_begin.tp_row * scp->xsize +
650 			    r->tr_begin.tp_col;
651 			dst = (p->tp_row + r->tr_end.tp_row -
652 			    r->tr_begin.tp_row - 1) * scp->xsize + p->tp_col;
653 
654 			while (src >= end) {
655 				sc_vtb_move(&scp->vtb, src, dst, width);
656 
657 				src -= scp->xsize;
658 				dst -= scp->xsize;
659 			}
660 		}
661 	}
662 
663 	/* Mark begin and end positions to be refreshed. */
664 	mark_for_update(scp,
665 	    p->tp_row * scp->xsize + p->tp_col);
666 	mark_for_update(scp,
667 	    (p->tp_row + r->tr_end.tp_row - r->tr_begin.tp_row - 1) *
668 	    scp->xsize +
669 	    (p->tp_col + r->tr_end.tp_col - r->tr_begin.tp_col - 1));
670 	sc_remove_cutmarking(scp);
671 }
672 
673 static void
674 scteken_param(void *arg, int cmd, unsigned int value)
675 {
676 	static int cattrs[] = {
677 		0,					/* block */
678 		CONS_BLINK_CURSOR,			/* blinking block */
679 		CONS_CHAR_CURSOR,			/* underline */
680 		CONS_CHAR_CURSOR | CONS_BLINK_CURSOR,	/* blinking underline */
681 		CONS_RESET_CURSOR,			/* reset to default */
682 		CONS_HIDDEN_CURSOR,			/* hide cursor */
683 	};
684 	static int tcattrs[] = {
685 		CONS_RESET_CURSOR | CONS_LOCAL_CURSOR,	/* normal */
686 		CONS_HIDDEN_CURSOR | CONS_LOCAL_CURSOR,	/* invisible */
687 	};
688 	scr_stat *scp = arg;
689 	int flags, n, v0, v1, v2;
690 
691 	switch (cmd) {
692 	case TP_SETBORDER:
693 		scp->border = value & 0xff;
694 		if (scp == scp->sc->cur_scp)
695 			sc_set_border(scp, scp->border);
696 		break;
697 	case TP_SETGLOBALCURSOR:
698 		n = value & 0xff;
699 		v0 = (value >> 8) & 0xff;
700 		v1 = (value >> 16) & 0xff;
701 		v2 = (value >> 24) & 0xff;
702 		switch (n) {
703 		case 1:	/* flags only */
704 			if (v0 < sizeof(cattrs) / sizeof(cattrs[0]))
705 				v0 = cattrs[v0];
706 			else /* backward compatibility */
707 				v0 = cattrs[v0 & 0x3];
708 			sc_change_cursor_shape(scp, v0, -1, -1);
709 			break;
710 		case 2:
711 			v2 = 0;
712 			v0 &= 0x1f;	/* backward compatibility */
713 			v1 &= 0x1f;
714 			/* FALL THROUGH */
715 		case 3:	/* base and height */
716 			if (v2 == 0)	/* count from top */
717 				sc_change_cursor_shape(scp, -1,
718 				    scp->font_size - v1 - 1,
719 				    v1 - v0 + 1);
720 			else if (v2 == 1) /* count from bottom */
721 				sc_change_cursor_shape(scp, -1,
722 				    v0, v1 - v0 + 1);
723 			break;
724 		}
725 		break;
726 	case TP_SETLOCALCURSOR:
727 		if (value < sizeof(tcattrs) / sizeof(tcattrs[0]))
728 			sc_change_cursor_shape(scp, tcattrs[value], -1, -1);
729 		else if (value == 2) {
730 			sc_change_cursor_shape(scp,
731 			    CONS_RESET_CURSOR | CONS_LOCAL_CURSOR, -1, -1);
732 			flags = scp->base_curs_attr.flags ^ CONS_BLINK_CURSOR;
733 			sc_change_cursor_shape(scp,
734 			    flags | CONS_LOCAL_CURSOR, -1, -1);
735 		}
736 		break;
737 	case TP_SHOWCURSOR:
738 		if (value != 0)
739 			flags = scp->base_curs_attr.flags & ~CONS_HIDDEN_CURSOR;
740 		else
741 			flags = scp->base_curs_attr.flags | CONS_HIDDEN_CURSOR;
742 		sc_change_cursor_shape(scp, flags | CONS_LOCAL_CURSOR, -1, -1);
743 		break;
744 	case TP_SWITCHVT:
745 		sc_switch_scr(scp->sc, value);
746 		break;
747 	case TP_SETBELLPD:
748 		scp->bell_pitch = TP_SETBELLPD_PITCH(value);
749 		scp->bell_duration = TP_SETBELLPD_DURATION(value);
750 		break;
751 	case TP_MOUSE:
752 		scp->mouse_level = value;
753 		break;
754 	}
755 }
756 
757 static void
758 scteken_respond(void *arg, const void *buf, size_t len)
759 {
760 	scr_stat *scp = arg;
761 
762 	sc_respond(scp, buf, len, 0);
763 }
764