xref: /dflybsd-src/sys/dev/misc/syscons/scvidctl.c (revision 22ff886e5769d1e8d4bf7faa7bdb9f608ede1714) 
1 /*-
2  * (MPSAFE)
3  *
4  * Copyright (c) 1998 Kazutaka YOKOTA <yokota@zodiac.mech.utsunomiya-u.ac.jp>
5  * All rights reserved.
6  *
7  * This code is derived from software contributed to The DragonFly Project
8  * by Sascha Wildner <saw@online.de>
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 AUTHOR ``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 AUTHOR 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  * $FreeBSD: src/sys/dev/syscons/scvidctl.c,v 1.19.2.2 2000/05/05 09:16:08 nyan Exp $
32  * $DragonFly: src/sys/dev/misc/syscons/scvidctl.c,v 1.16 2007/08/19 11:39:11 swildner Exp $
33  */
34 
35 #include "opt_syscons.h"
36 
37 #include <sys/param.h>
38 #include <sys/systm.h>
39 #include <sys/conf.h>
40 #include <sys/signalvar.h>
41 #include <sys/tty.h>
42 #include <sys/kernel.h>
43 #include <sys/thread2.h>
44 
45 #include <machine/console.h>
46 
47 #include <dev/video/fb/fbreg.h>
48 #include "syscons.h"
49 
50 SET_DECLARE(scrndr_set, const sc_renderer_t);
51 
52 int
53 sc_set_text_mode(scr_stat *scp, struct tty *tp, int mode, int xsize, int ysize,
54 		 int fontsize)
55 {
56     video_info_t info;
57     u_char *font;
58     int prev_ysize;
59     int new_ysize;
60     int error;
61 
62     lwkt_gettoken(&tty_token);
63     if ((*vidsw[scp->sc->adapter]->get_info)(scp->sc->adp, mode, &info)) {
64 	lwkt_reltoken(&tty_token);
65 	return ENODEV;
66     }
67     lwkt_reltoken(&tty_token);
68 
69     /* adjust argument values */
70     if (fontsize <= 0)
71 	fontsize = info.vi_cheight;
72     if (fontsize < 14) {
73 	fontsize = 8;
74 #ifndef SC_NO_FONT_LOADING
75 	if (!(scp->sc->fonts_loaded & FONT_8))
76 	    return EINVAL;
77 	font = scp->sc->font_8;
78 #else
79 	font = NULL;
80 #endif
81     } else if (fontsize >= 16) {
82 	fontsize = 16;
83 #ifndef SC_NO_FONT_LOADING
84 	if (!(scp->sc->fonts_loaded & FONT_16))
85 	    return EINVAL;
86 	font = scp->sc->font_16;
87 #else
88 	font = NULL;
89 #endif
90     } else {
91 	fontsize = 14;
92 #ifndef SC_NO_FONT_LOADING
93 	if (!(scp->sc->fonts_loaded & FONT_14))
94 	    return EINVAL;
95 	font = scp->sc->font_14;
96 #else
97 	font = NULL;
98 #endif
99     }
100     if ((xsize <= 0) || (xsize > info.vi_width))
101 	xsize = info.vi_width;
102     if ((ysize <= 0) || (ysize > info.vi_height))
103 	ysize = info.vi_height;
104 
105     /* stop screen saver, etc */
106     crit_enter();
107     if ((error = sc_clean_up(scp))) {
108 	crit_exit();
109 	return error;
110     }
111 
112     if (sc_render_match(scp, scp->sc->adp->va_name, V_INFO_MM_TEXT) == NULL) {
113 	crit_exit();
114 	return ENODEV;
115     }
116 
117     /* set up scp */
118     new_ysize = 0;
119 #ifndef SC_NO_HISTORY
120     if (scp->history != NULL) {
121 	sc_hist_save(scp);
122 	new_ysize = sc_vtb_rows(scp->history);
123     }
124 #endif
125     prev_ysize = scp->ysize;
126     /*
127      * This is a kludge to fend off scrn_update() while we
128      * muck around with scp. XXX
129      */
130     scp->status |= UNKNOWN_MODE | MOUSE_HIDDEN;
131     scp->status &= ~(GRAPHICS_MODE | PIXEL_MODE | MOUSE_VISIBLE);
132     scp->mode = mode;
133     scp->model = V_INFO_MM_TEXT;
134     scp->xsize = xsize;
135     scp->ysize = ysize;
136     scp->xoff = 0;
137     scp->yoff = 0;
138     scp->xpixel = scp->xsize*8;
139     scp->ypixel = scp->ysize*fontsize;
140     scp->font = font;
141     scp->font_size = fontsize;
142 
143     /* allocate buffers */
144     sc_alloc_scr_buffer(scp, TRUE, TRUE);
145     sc_init_emulator(scp, NULL);
146 #ifndef SC_NO_CUTPASTE
147     sc_alloc_cut_buffer(scp, FALSE);
148 #endif
149 #ifndef SC_NO_HISTORY
150     sc_alloc_history_buffer(scp, new_ysize, prev_ysize, FALSE);
151 #endif
152     crit_exit();
153 
154     if (scp == scp->sc->cur_scp)
155 	set_mode(scp);
156     scp->status &= ~UNKNOWN_MODE;
157 
158     if (tp == NULL)
159 	return 0;
160     DPRINTF(5, ("ws_*size (%d,%d), size (%d,%d)\n",
161 	tp->t_winsize.ws_col, tp->t_winsize.ws_row, scp->xsize, scp->ysize));
162     if (tp->t_winsize.ws_col != scp->xsize
163 	|| tp->t_winsize.ws_row != scp->ysize) {
164 	tp->t_winsize.ws_col = scp->xsize;
165 	tp->t_winsize.ws_row = scp->ysize;
166 	pgsignal(tp->t_pgrp, SIGWINCH, 1);
167     }
168 
169     return 0;
170 }
171 
172 int
173 sc_set_graphics_mode(scr_stat *scp, struct tty *tp, int mode)
174 {
175 #ifdef SC_NO_MODE_CHANGE
176     return ENODEV;
177 #else
178     video_info_t info;
179     int error;
180 
181     lwkt_gettoken(&tty_token);
182     if ((*vidsw[scp->sc->adapter]->get_info)(scp->sc->adp, mode, &info)) {
183         lwkt_reltoken(&tty_token);
184 	return ENODEV;
185     }
186     lwkt_reltoken(&tty_token);
187 
188     /* stop screen saver, etc */
189     crit_enter();
190     if ((error = sc_clean_up(scp))) {
191 	crit_exit();
192 	return error;
193     }
194 
195     if (sc_render_match(scp, scp->sc->adp->va_name, V_INFO_MM_OTHER) == NULL) {
196 	crit_exit();
197 	return ENODEV;
198     }
199 
200     /* set up scp */
201     scp->status |= (UNKNOWN_MODE | GRAPHICS_MODE | MOUSE_HIDDEN);
202     scp->status &= ~(PIXEL_MODE | MOUSE_VISIBLE);
203     scp->mode = mode;
204     scp->model = V_INFO_MM_OTHER;
205     /*
206      * Don't change xsize and ysize; preserve the previous vty
207      * and history buffers.
208      */
209     scp->xoff = 0;
210     scp->yoff = 0;
211     scp->xpixel = info.vi_width;
212     scp->ypixel = info.vi_height;
213     scp->font = NULL;
214     scp->font_size = 0;
215 #ifndef SC_NO_SYSMOUSE
216     /* move the mouse cursor at the center of the screen */
217     sc_mouse_move(scp, scp->xpixel / 2, scp->ypixel / 2);
218 #endif
219     sc_init_emulator(scp, NULL);
220     crit_exit();
221 
222     if (scp == scp->sc->cur_scp)
223 	set_mode(scp);
224     /* clear_graphics();*/
225     refresh_ega_palette(scp);
226     scp->status &= ~UNKNOWN_MODE;
227 
228     if (tp == NULL)
229 	return 0;
230     if (tp->t_winsize.ws_xpixel != scp->xpixel
231 	|| tp->t_winsize.ws_ypixel != scp->ypixel) {
232 	tp->t_winsize.ws_xpixel = scp->xpixel;
233 	tp->t_winsize.ws_ypixel = scp->ypixel;
234 	pgsignal(tp->t_pgrp, SIGWINCH, 1);
235     }
236 
237     return 0;
238 #endif /* SC_NO_MODE_CHANGE */
239 }
240 
241 int
242 sc_set_pixel_mode(scr_stat *scp, struct tty *tp, int xsize, int ysize,
243 		  int fontsize)
244 {
245 #ifndef SC_PIXEL_MODE
246     return ENODEV;
247 #else
248     video_info_t info;
249     u_char *font;
250     int prev_ysize;
251     int new_ysize;
252     int error;
253 
254     lwkt_gettoken(&tty_token);
255     if ((*vidsw[scp->sc->adapter]->get_info)(scp->sc->adp, scp->mode, &info)) {
256         lwkt_reltoken(&tty_token);
257 	return ENODEV;		/* this shouldn't happen */
258     }
259 
260     /* adjust argument values */
261     if (fontsize <= 0)
262 	fontsize = info.vi_cheight;
263     if (fontsize < 14) {
264 	fontsize = 8;
265 #ifndef SC_NO_FONT_LOADING
266 	if (!(scp->sc->fonts_loaded & FONT_8))
267 	    return EINVAL;
268 	font = scp->sc->font_8;
269 #else
270 	font = NULL;
271 #endif
272     } else if (fontsize >= 16) {
273 	fontsize = 16;
274 #ifndef SC_NO_FONT_LOADING
275 	if (!(scp->sc->fonts_loaded & FONT_16))
276 	    return EINVAL;
277 	font = scp->sc->font_16;
278 #else
279 	font = NULL;
280 #endif
281     } else {
282 	fontsize = 14;
283 #ifndef SC_NO_FONT_LOADING
284 	if (!(scp->sc->fonts_loaded & FONT_14))
285 	    return EINVAL;
286 	font = scp->sc->font_14;
287 #else
288 	font = NULL;
289 #endif
290     }
291     if (xsize <= 0)
292 	xsize = info.vi_width/8;
293     if (ysize <= 0)
294 	ysize = info.vi_height/fontsize;
295 
296     if ((info.vi_width < xsize*8) || (info.vi_height < ysize*fontsize))
297 	return EINVAL;
298 
299     /*
300      * We currently support the following graphic modes:
301      *
302      * - 4 bpp planar modes whose memory size does not exceed 64K
303      * - 8 bbp packed pixel modes
304      * - 15, 16, 24 and 32 bpp direct modes with linear frame buffer
305      */
306 
307     if (info.vi_mem_model == V_INFO_MM_PLANAR) {
308 	if (info.vi_planes != 4)
309 	    return ENODEV;
310 
311 	/*
312 	 * A memory size >64K requires bank switching to access the entire
313 	 * screen. XXX
314 	 */
315 
316 	if (info.vi_width * info.vi_height / 8 > info.vi_window_size)
317 	    return ENODEV;
318     } else if (info.vi_mem_model == V_INFO_MM_PACKED) {
319 	if (info.vi_depth != 8)
320 	    return ENODEV;
321     } else if (info.vi_mem_model == V_INFO_MM_DIRECT) {
322 	if (!(info.vi_flags & V_INFO_LINEAR) &&
323 	    (info.vi_depth != 15) && (info.vi_depth != 16) &&
324 	    (info.vi_depth != 24) && (info.vi_depth != 32))
325 	    return ENODEV;
326     } else
327 	return ENODEV;
328 
329     /* stop screen saver, etc */
330     crit_enter();
331     if ((error = sc_clean_up(scp))) {
332 	crit_exit();
333 	return error;
334     }
335 
336     if (sc_render_match(scp, scp->sc->adp->va_name, info.vi_mem_model) == NULL) {
337 	crit_exit();
338 	return ENODEV;
339     }
340 
341 #if 0
342     if (scp->tsw)
343 	(*scp->tsw->te_term)(scp, scp->ts);
344     scp->tsw = NULL;
345     scp->ts = NULL;
346 #endif
347 
348     /* set up scp */
349     new_ysize = 0;
350 #ifndef SC_NO_HISTORY
351     if (scp->history != NULL) {
352 	sc_hist_save(scp);
353 	new_ysize = sc_vtb_rows(scp->history);
354     }
355 #endif
356     prev_ysize = scp->ysize;
357     scp->status |= (UNKNOWN_MODE | PIXEL_MODE | MOUSE_HIDDEN);
358     scp->status &= ~(GRAPHICS_MODE | MOUSE_VISIBLE);
359     scp->model = info.vi_mem_model;
360     scp->xsize = xsize;
361     scp->ysize = ysize;
362     scp->xoff = (scp->xpixel/8 - xsize)/2;
363     scp->yoff = (scp->ypixel/fontsize - ysize)/2;
364     scp->font = font;
365     scp->font_size = fontsize;
366 
367     /* allocate buffers */
368     sc_alloc_scr_buffer(scp, TRUE, TRUE);
369     sc_init_emulator(scp, NULL);
370 #ifndef SC_NO_CUTPASTE
371     sc_alloc_cut_buffer(scp, FALSE);
372 #endif
373 #ifndef SC_NO_HISTORY
374     sc_alloc_history_buffer(scp, new_ysize, prev_ysize, FALSE);
375 #endif
376     crit_exit();
377 
378     if (scp == scp->sc->cur_scp) {
379 	sc_set_border(scp, scp->border);
380 	sc_set_cursor_image(scp);
381     }
382 
383     scp->status &= ~UNKNOWN_MODE;
384 
385     if (tp == NULL)
386 	return 0;
387     if (tp->t_winsize.ws_col != scp->xsize
388 	|| tp->t_winsize.ws_row != scp->ysize) {
389 	tp->t_winsize.ws_col = scp->xsize;
390 	tp->t_winsize.ws_row = scp->ysize;
391 	pgsignal(tp->t_pgrp, SIGWINCH, 1);
392     }
393 
394     return 0;
395 #endif /* SC_PIXEL_MODE */
396 }
397 
398 #define fb_ioctl(a, c, d)		\
399 	(((a) == NULL) ? ENODEV : 	\
400 			 (*vidsw[(a)->va_index]->ioctl)((a), (c), (caddr_t)(d)))
401 
402 int
403 sc_vid_ioctl(struct tty *tp, u_long cmd, caddr_t data, int flag)
404 {
405     scr_stat *scp;
406     video_adapter_t *adp;
407     video_info_t info;
408     int error, ret;
409 
410 	KKASSERT(tp->t_dev);
411 
412     scp = SC_STAT(tp->t_dev);
413     if (scp == NULL)		/* tp == SC_MOUSE */
414 		return ENOIOCTL;
415     adp = scp->sc->adp;
416     if (adp == NULL)		/* shouldn't happen??? */
417 		return ENODEV;
418 
419     lwkt_gettoken(&tty_token);
420     switch (cmd) {
421 
422     case CONS_CURRENTADP:	/* get current adapter index */
423     case FBIO_ADAPTER:
424 	ret = fb_ioctl(adp, FBIO_ADAPTER, data);
425 	lwkt_reltoken(&tty_token);
426 	return ret;
427 
428     case CONS_CURRENT:  	/* get current adapter type */
429     case FBIO_ADPTYPE:
430 	ret = fb_ioctl(adp, FBIO_ADPTYPE, data);
431 	lwkt_reltoken(&tty_token);
432 	return ret;
433 
434     case CONS_ADPINFO:		/* adapter information */
435     case FBIO_ADPINFO:
436 	if (((video_adapter_info_t *)data)->va_index >= 0) {
437 	    adp = vid_get_adapter(((video_adapter_info_t *)data)->va_index);
438 	    if (adp == NULL) {
439 		lwkt_reltoken(&tty_token);
440 		return ENODEV;
441 	    }
442 	}
443 	ret = fb_ioctl(adp, FBIO_ADPINFO, data);
444 	lwkt_reltoken(&tty_token);
445 	return ret;
446 
447     case CONS_GET:      	/* get current video mode */
448     case FBIO_GETMODE:
449 	*(int *)data = scp->mode;
450 	lwkt_reltoken(&tty_token);
451 	return 0;
452 
453 #ifndef SC_NO_MODE_CHANGE
454     case CONS_SET:
455     case FBIO_SETMODE:		/* set video mode */
456 	if (!(adp->va_flags & V_ADP_MODECHANGE)) {
457 	    lwkt_reltoken(&tty_token);
458  	    return ENODEV;
459 	}
460 	info.vi_mode = *(int *)data;
461 	error = fb_ioctl(adp, FBIO_MODEINFO, &info);
462 	if (error) {
463 	    lwkt_reltoken(&tty_token);
464 	    return error;
465 	}
466 	if (info.vi_flags & V_INFO_GRAPHICS) {
467 	    lwkt_reltoken(&tty_token);
468 	    return sc_set_graphics_mode(scp, tp, *(int *)data);
469 	} else {
470 	    lwkt_reltoken(&tty_token);
471 	    return sc_set_text_mode(scp, tp, *(int *)data, 0, 0, 0);
472 	}
473 #endif /* SC_NO_MODE_CHANGE */
474 
475     case CONS_MODEINFO:		/* get mode information */
476     case FBIO_MODEINFO:
477 	ret = fb_ioctl(adp, FBIO_MODEINFO, data);
478 	lwkt_reltoken(&tty_token);
479 	return ret;
480 
481     case CONS_FINDMODE:		/* find a matching video mode */
482     case FBIO_FINDMODE:
483 	ret = fb_ioctl(adp, FBIO_FINDMODE, data);
484 	lwkt_reltoken(&tty_token);
485 	return ret;
486 
487     case CONS_SETWINORG:	/* set frame buffer window origin */
488     case FBIO_SETWINORG:
489 	if (scp != scp->sc->cur_scp) {
490 	    lwkt_reltoken(&tty_token);
491 	    return ENODEV;	/* XXX */
492 	}
493 	ret = fb_ioctl(adp, FBIO_SETWINORG, data);
494 	lwkt_reltoken(&tty_token);
495 	return ret;
496 
497     case FBIO_GETWINORG:	/* get frame buffer window origin */
498 	if (scp != scp->sc->cur_scp) {
499 	    lwkt_reltoken(&tty_token);
500 	    return ENODEV;	/* XXX */
501 	}
502 	ret = fb_ioctl(adp, FBIO_GETWINORG, data);
503 	lwkt_reltoken(&tty_token);
504 	return ret;
505 
506     case FBIO_GETDISPSTART:
507     case FBIO_SETDISPSTART:
508     case FBIO_GETLINEWIDTH:
509     case FBIO_SETLINEWIDTH:
510 	if (scp != scp->sc->cur_scp) {
511 	    lwkt_reltoken(&tty_token);
512 	    return ENODEV;	/* XXX */
513 	}
514 	ret = fb_ioctl(adp, cmd, data);
515 	lwkt_reltoken(&tty_token);
516 	return ret;
517 
518     case FBIO_GETPALETTE:
519     case FBIO_SETPALETTE:
520     case FBIOPUTCMAP:
521     case FBIOGETCMAP:
522     case FBIOGTYPE:
523     case FBIOGATTR:
524     case FBIOSVIDEO:
525     case FBIOGVIDEO:
526     case FBIOSCURSOR:
527     case FBIOGCURSOR:
528     case FBIOSCURPOS:
529     case FBIOGCURPOS:
530     case FBIOGCURMAX:
531 	if (scp != scp->sc->cur_scp) {
532 	    lwkt_reltoken(&tty_token);
533 	    return ENODEV;	/* XXX */
534 	}
535 	ret = fb_ioctl(adp, cmd, data);
536 	lwkt_reltoken(&tty_token);
537 	return ret;
538 
539     case KDSETMODE:     	/* set current mode of this (virtual) console */
540 	switch (*(int *)data) {
541 	case KD_TEXT:   	/* switch to TEXT (known) mode */
542 	    /*
543 	     * If scp->mode is of graphics modes, we don't know which
544 	     * text mode to switch back to...
545 	     */
546 	    if (scp->status & GRAPHICS_MODE) {
547 	        lwkt_reltoken(&tty_token);
548 		return EINVAL;
549 	    }
550 	    /* restore fonts & palette ! */
551 #if 0
552 #ifndef SC_NO_FONT_LOADING
553 	    if (ISFONTAVAIL(adp->va_flags)
554 		&& !(scp->status & (GRAPHICS_MODE | PIXEL_MODE)))
555 		/*
556 		 * FONT KLUDGE
557 		 * Don't load fonts for now... XXX
558 		 */
559 		if (scp->sc->fonts_loaded & FONT_8)
560 		    sc_load_font(scp, 0, 8, scp->sc->font_8, 0, 256);
561 		if (scp->sc->fonts_loaded & FONT_14)
562 		    sc_load_font(scp, 0, 14, scp->sc->font_14, 0, 256);
563 		if (scp->sc->fonts_loaded & FONT_16)
564 		    sc_load_font(scp, 0, 16, scp->sc->font_16, 0, 256);
565 	    }
566 #endif /* SC_NO_FONT_LOADING */
567 #endif
568 
569 #ifndef SC_NO_PALETTE_LOADING
570 	    load_palette(adp, scp->sc->palette);
571 #endif
572 
573 	    /* move hardware cursor out of the way */
574 	    (*vidsw[adp->va_index]->set_hw_cursor)(adp, -1, -1);
575 	    /* FALL THROUGH */
576 
577 	case KD_TEXT1:  	/* switch to TEXT (known) mode */
578 	    /*
579 	     * If scp->mode is of graphics modes, we don't know which
580 	     * text/pixel mode to switch back to...
581 	     */
582 	    if (scp->status & GRAPHICS_MODE) {
583 	        lwkt_reltoken(&tty_token);
584 		return EINVAL;
585 	    }
586 	    crit_enter();
587 	    if ((error = sc_clean_up(scp))) {
588 		crit_exit();
589 		lwkt_reltoken(&tty_token);
590 		return error;
591 	    }
592 	    scp->status |= UNKNOWN_MODE | MOUSE_HIDDEN;
593 	    crit_exit();
594 	    /* no restore fonts & palette */
595 	    if (scp == scp->sc->cur_scp)
596 		set_mode(scp);
597 	    sc_clear_screen(scp);
598 	    scp->status &= ~UNKNOWN_MODE;
599 	    lwkt_reltoken(&tty_token);
600 	    return 0;
601 
602 #ifdef SC_PIXEL_MODE
603 	case KD_PIXEL:		/* pixel (raster) display */
604 	    if (!(scp->status & (GRAPHICS_MODE | PIXEL_MODE))) {
605 	        lwkt_reltoken(&tty_token);
606 		return EINVAL;
607             }
608 	    if (scp->status & GRAPHICS_MODE) {
609 	        lwkt_reltoken(&tty_token);
610 		return sc_set_pixel_mode(scp, tp, scp->xsize, scp->ysize,
611 					 scp->font_size);
612 	    }
613 	    crit_enter();
614 	    if ((error = sc_clean_up(scp))) {
615 		crit_exit();
616 		lwkt_reltoken(&tty_token);
617 		return error;
618 	    }
619 	    scp->status |= (UNKNOWN_MODE | PIXEL_MODE | MOUSE_HIDDEN);
620 	    crit_exit();
621 	    if (scp == scp->sc->cur_scp) {
622 		set_mode(scp);
623 #ifndef SC_NO_PALETTE_LOADING
624 		load_palette(adp, scp->sc->palette);
625 #endif
626 	    }
627 	    sc_clear_screen(scp);
628 	    scp->status &= ~UNKNOWN_MODE;
629 	    lwkt_reltoken(&tty_token);
630 	    return 0;
631 #endif /* SC_PIXEL_MODE */
632 
633 	case KD_GRAPHICS:	/* switch to GRAPHICS (unknown) mode */
634 	    crit_enter();
635 	    if ((error = sc_clean_up(scp))) {
636 		crit_exit();
637 		lwkt_reltoken(&tty_token);
638 		return error;
639 	    }
640 	    scp->status |= UNKNOWN_MODE | MOUSE_HIDDEN;
641 	    crit_exit();
642 	    lwkt_reltoken(&tty_token);
643 	    return 0;
644 
645 	default:
646 	    lwkt_reltoken(&tty_token);
647 	    return EINVAL;
648 	}
649 	/* NOT REACHED */
650 
651 #ifdef SC_PIXEL_MODE
652     case KDRASTER:		/* set pixel (raster) display mode */
653 	if (ISUNKNOWNSC(scp) || ISTEXTSC(scp)) {
654 	    lwkt_reltoken(&tty_token);
655 	    return ENODEV;
656 	}
657 	lwkt_reltoken(&tty_token);
658 	return sc_set_pixel_mode(scp, tp, ((int *)data)[0], ((int *)data)[1],
659 				 ((int *)data)[2]);
660 #endif /* SC_PIXEL_MODE */
661 
662     case KDGETMODE:     	/* get current mode of this (virtual) console */
663 	/*
664 	 * From the user program's point of view, KD_PIXEL is the same
665 	 * as KD_TEXT...
666 	 */
667 	*data = ISGRAPHSC(scp) ? KD_GRAPHICS : KD_TEXT;
668 	lwkt_reltoken(&tty_token);
669 	return 0;
670 
671     case KDSBORDER:     	/* set border color of this (virtual) console */
672 	scp->border = *data;
673 	if (scp == scp->sc->cur_scp)
674 	    sc_set_border(scp, scp->border);
675 	lwkt_reltoken(&tty_token);
676 	return 0;
677     }
678 
679     lwkt_reltoken(&tty_token);
680     return ENOIOCTL;
681 }
682 
683 static LIST_HEAD(, sc_renderer) sc_rndr_list =
684 	LIST_HEAD_INITIALIZER(sc_rndr_list);
685 
686 int
687 sc_render_add(sc_renderer_t *rndr)
688 {
689 	LIST_INSERT_HEAD(&sc_rndr_list, rndr, link);
690 	return 0;
691 }
692 
693 int
694 sc_render_remove(sc_renderer_t *rndr)
695 {
696 	/*
697 	LIST_REMOVE(rndr, link);
698 	*/
699 	return EBUSY;	/* XXX */
700 }
701 
702 sc_rndr_sw_t *
703 sc_render_match(scr_stat *scp, char *name, int model)
704 {
705 	const sc_renderer_t **list;
706 	const sc_renderer_t *p;
707 
708 	if (!LIST_EMPTY(&sc_rndr_list)) {
709 		LIST_FOREACH(p, &sc_rndr_list, link) {
710 			if ((strcmp(p->name, name) == 0) &&
711 			    (model == p->model)) {
712 				scp->status &=
713 				    ~(VR_CURSOR_ON | VR_CURSOR_BLINK);
714 				return p->rndrsw;
715 			}
716 		}
717 	} else {
718 		SET_FOREACH(list, scrndr_set) {
719 			p = *list;
720 			if ((strcmp(p->name, name) == 0) &&
721 			    (model == p->model)) {
722 				scp->status &=
723 				    ~(VR_CURSOR_ON | VR_CURSOR_BLINK);
724 				return p->rndrsw;
725 			}
726 		}
727 	}
728 
729 	return NULL;
730 }
731