xref: /freebsd/sys/dev/vt/vt.h (revision b93028d8cd3aafc883b5f0ecec65a8a2a30af7f3)
1 /*-
2  * SPDX-License-Identifier: BSD-2-Clause
3  *
4  * Copyright (c) 2009, 2013 The FreeBSD Foundation
5  *
6  * This software was developed by Ed Schouten under sponsorship from the
7  * FreeBSD Foundation.
8  *
9  * Portions of this software were developed by Oleksandr Rybalko
10  * under sponsorship from the FreeBSD Foundation.
11  *
12  * Redistribution and use in source and binary forms, with or without
13  * modification, are permitted provided that the following conditions
14  * are met:
15  * 1. Redistributions of source code must retain the above copyright
16  *    notice, this list of conditions and the following disclaimer.
17  * 2. Redistributions in binary form must reproduce the above copyright
18  *    notice, this list of conditions and the following disclaimer in the
19  *    documentation and/or other materials provided with the distribution.
20  *
21  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31  * SUCH DAMAGE.
32  */
33 
34 #ifndef _DEV_VT_VT_H_
35 #define	_DEV_VT_VT_H_
36 
37 #include <sys/param.h>
38 #include <sys/_lock.h>
39 #include <sys/_mutex.h>
40 #include <sys/callout.h>
41 #include <sys/condvar.h>
42 #include <sys/conf.h>
43 #include <sys/consio.h>
44 #include <sys/kbio.h>
45 #include <sys/mouse.h>
46 #include <sys/terminal.h>
47 #include <sys/sysctl.h>
48 #include <sys/font.h>
49 #include <sys/taskqueue.h>
50 
51 #include "opt_syscons.h"
52 #include "opt_splash.h"
53 
54 #ifndef	VT_MAXWINDOWS
55 #ifdef	MAXCONS
56 #define	VT_MAXWINDOWS	MAXCONS
57 #else
58 #define	VT_MAXWINDOWS	12
59 #endif
60 #endif
61 
62 #ifndef VT_ALT_TO_ESC_HACK
63 #define	VT_ALT_TO_ESC_HACK	1
64 #endif
65 
66 #define	VT_CONSWINDOW	0
67 
68 #if defined(SC_TWOBUTTON_MOUSE) || defined(VT_TWOBUTTON_MOUSE)
69 #define VT_MOUSE_PASTEBUTTON	MOUSE_BUTTON3DOWN	/* right button */
70 #define VT_MOUSE_EXTENDBUTTON	MOUSE_BUTTON2DOWN	/* not really used */
71 #else
72 #define VT_MOUSE_PASTEBUTTON	MOUSE_BUTTON2DOWN	/* middle button */
73 #define VT_MOUSE_EXTENDBUTTON	MOUSE_BUTTON3DOWN	/* right button */
74 #endif /* defined(SC_TWOBUTTON_MOUSE) || defined(VT_TWOBUTTON_MOUSE) */
75 
76 #define	SC_DRIVER_NAME	"vt"
77 #ifdef VT_DEBUG
78 #define	DPRINTF(_l, ...)	if (vt_debug > (_l)) printf( __VA_ARGS__ )
79 #define VT_CONSOLECTL_DEBUG
80 #define VT_SYSMOUSE_DEBUG
81 #else
82 #define	DPRINTF(_l, ...)	do {} while (0)
83 #endif
84 #define	ISSIGVALID(sig)	((sig) > 0 && (sig) < NSIG)
85 
86 #define	VT_SYSCTL_INT(_name, _default, _descr)				\
87 int vt_##_name = (_default);						\
88 SYSCTL_INT(_kern_vt, OID_AUTO, _name, CTLFLAG_RWTUN, &vt_##_name, 0, _descr)
89 
90 struct vt_driver;
91 
92 int vt_allocate(const struct vt_driver *, void *);
93 int vt_deallocate(const struct vt_driver *, void *);
94 
95 typedef unsigned int	vt_axis_t;
96 
97 /*
98  * List of locks
99  * (d)	locked by vd_lock
100  * (b)	locked by vb_lock
101  * (G)	locked by Giant
102  * (u)	unlocked, locked by higher levels
103  * (c)	const until freeing
104  * (?)	yet to be determined
105  */
106 
107 /*
108  * Per-device datastructure.
109  */
110 
111 #ifndef SC_NO_CUTPASTE
112 struct vt_mouse_cursor;
113 #endif
114 
115 struct vt_pastebuf {
116 	term_char_t		*vpb_buf;	/* Copy-paste buffer. */
117 	unsigned int		 vpb_bufsz;	/* Buffer size. */
118 	unsigned int		 vpb_len;	/* Length of a last selection. */
119 };
120 
121 struct vt_device {
122 	struct vt_window	*vd_windows[VT_MAXWINDOWS]; /* (c) Windows. */
123 	struct vt_window	*vd_curwindow;	/* (d) Current window. */
124 	struct vt_window	*vd_savedwindow;/* (?) Saved for suspend. */
125 	struct vt_window	*vd_grabwindow;	/* (?) Saved before cngrab. */
126 	struct vt_pastebuf	 vd_pastebuf;	/* (?) Copy/paste buf. */
127 	const struct vt_driver	*vd_driver;	/* (c) Graphics driver. */
128 	void			*vd_softc;	/* (u) Driver data. */
129 	const struct vt_driver	*vd_prev_driver;/* (?) Previous driver. */
130 	void			*vd_prev_softc;	/* (?) Previous driver data. */
131 	device_t		 vd_video_dev;	/* (?) Video adapter. */
132 #ifndef SC_NO_CUTPASTE
133 	struct vt_mouse_cursor	*vd_mcursor;	/* (?) Cursor bitmap. */
134 	term_color_t		 vd_mcursor_fg;	/* (?) Cursor fg color. */
135 	term_color_t		 vd_mcursor_bg;	/* (?) Cursor bg color. */
136 	vt_axis_t		 vd_mx_drawn;	/* (?) Mouse X and Y      */
137 	vt_axis_t		 vd_my_drawn;	/*     as of last redraw. */
138 	int			 vd_mshown;	/* (?) Mouse shown during */
139 #endif						/*     last redrawn.      */
140 	uint16_t		 vd_mx;		/* (?) Current mouse X. */
141 	uint16_t		 vd_my;		/* (?) current mouse Y. */
142 	uint32_t		 vd_mstate;	/* (?) Mouse state. */
143 	vt_axis_t		 vd_width;	/* (?) Screen width. */
144 	vt_axis_t		 vd_height;	/* (?) Screen height. */
145 	size_t			 vd_transpose;	/* (?) Screen offset in FB */
146 	struct mtx		 vd_lock;	/* Per-device lock. */
147 	struct cv		 vd_winswitch;	/* (d) Window switch notify. */
148 	struct callout		 vd_timer;	/* (d) Display timer. */
149 	volatile unsigned int	 vd_timer_armed;/* (?) Display timer started.*/
150 	int			 vd_flags;	/* (d) Device flags. */
151 #define	VDF_TEXTMODE	0x01	/* Do text mode rendering. */
152 #define	VDF_SPLASH	0x02	/* Splash screen active. */
153 #define	VDF_ASYNC	0x04	/* vt_timer() running. */
154 #define	VDF_INVALID	0x08	/* Entire screen should be re-rendered. */
155 #define	VDF_DEAD	0x10	/* Early probing found nothing. */
156 #define	VDF_INITIALIZED	0x20	/* vtterm_cnprobe already done. */
157 #define	VDF_MOUSECURSOR	0x40	/* Mouse cursor visible. */
158 #define	VDF_QUIET_BELL	0x80	/* Disable bell. */
159 #define	VDF_SUSPENDED	0x100	/* Device has been suspended. */
160 #define	VDF_DOWNGRADE	0x8000	/* The driver is being downgraded. */
161 	struct keyboard		*vd_keyboard;	/* (G) Keyboard. */
162 	unsigned int		 vd_kbstate;	/* (?) Device unit. */
163 	unsigned int		 vd_unit;	/* (c) Device unit. */
164 	int			 vd_altbrk;	/* (?) Alt break seq. state */
165 	term_char_t		*vd_drawn;	/* (?) Most recent char drawn. */
166 	term_color_t		*vd_drawnfg;	/* (?) Most recent fg color drawn. */
167 	term_color_t		*vd_drawnbg;	/* (?) Most recent bg color drawn. */
168 
169 	struct mtx		 vd_flush_lock;	/* (?) vt_flush() lock. */
170 	bool			*vd_pos_to_flush;/* (?) Positions to flush. */
171 };
172 
173 #define	VD_PASTEBUF(vd)	((vd)->vd_pastebuf.vpb_buf)
174 #define	VD_PASTEBUFSZ(vd)	((vd)->vd_pastebuf.vpb_bufsz)
175 #define	VD_PASTEBUFLEN(vd)	((vd)->vd_pastebuf.vpb_len)
176 
177 #define	VT_LOCK(vd)	mtx_lock(&(vd)->vd_lock)
178 #define	VT_UNLOCK(vd)	mtx_unlock(&(vd)->vd_lock)
179 #define	VT_LOCK_ASSERT(vd, what)	mtx_assert(&(vd)->vd_lock, what)
180 
181 #define	VT_FLUSH_LOCK(vd)	\
182     if ((vd)->vd_driver->vd_bitblt_after_vtbuf_unlock) \
183 	    mtx_lock(&(vd)->vd_flush_lock)
184 
185 #define	VT_FLUSH_UNLOCK(vd)	\
186     if ((vd)->vd_driver->vd_bitblt_after_vtbuf_unlock) \
187 	    mtx_unlock(&(vd)->vd_flush_lock)
188 
189 void vt_resume(struct vt_device *vd);
190 void vt_resume_flush_timer(struct vt_window *vw, int ms);
191 void vt_suspend(struct vt_device *vd);
192 
193 /*
194  * Per-window terminal screen buffer.
195  *
196  * Because redrawing is performed asynchronously, the buffer keeps track
197  * of a rectangle that needs to be redrawn (vb_dirtyrect).  Because this
198  * approach seemed to cause suboptimal performance (when the top left
199  * and the bottom right of the screen are modified), it also uses a set
200  * of bitmasks to keep track of the rows and columns (mod 64) that have
201  * been modified.
202  */
203 
204 struct vt_buf {
205 	struct mtx		 vb_lock;	/* Buffer lock. */
206 	struct terminal		*vb_terminal;
207 	term_pos_t		 vb_scr_size;	/* (b) Screen dimensions. */
208 	int			 vb_flags;	/* (b) Flags. */
209 #define	VBF_CURSOR	0x1	/* Cursor visible. */
210 #define	VBF_STATIC	0x2	/* Buffer is statically allocated. */
211 #define	VBF_MTX_INIT	0x4	/* Mutex initialized. */
212 #define	VBF_SCROLL	0x8	/* scroll locked mode. */
213 #define	VBF_HISTORY_FULL 0x10	/* All rows filled. */
214 	unsigned int		 vb_history_size;
215 	unsigned int		 vb_roffset;	/* (b) History rows offset. */
216 	unsigned int		 vb_curroffset;	/* (b) Saved rows offset. */
217 	term_pos_t		 vb_cursor;	/* (u) Cursor position. */
218 	term_pos_t		 vb_mark_start;	/* (b) Copy region start. */
219 	term_pos_t		 vb_mark_end;	/* (b) Copy region end. */
220 	int			 vb_mark_last;	/* Last mouse event. */
221 	term_rect_t		 vb_dirtyrect;	/* (b) Dirty rectangle. */
222 	term_char_t		*vb_buffer;	/* (u) Data buffer. */
223 	term_char_t		**vb_rows;	/* (u) Array of rows */
224 };
225 
226 #ifdef SC_HISTORY_SIZE
227 #define	VBF_DEFAULT_HISTORY_SIZE	SC_HISTORY_SIZE
228 #else
229 #define	VBF_DEFAULT_HISTORY_SIZE	500
230 #endif
231 
232 void vtbuf_lock(struct vt_buf *);
233 void vtbuf_unlock(struct vt_buf *);
234 void vtbuf_copy(struct vt_buf *, const term_rect_t *, const term_pos_t *);
235 void vtbuf_fill(struct vt_buf *, const term_rect_t *, term_char_t);
236 void vtbuf_init_early(struct vt_buf *);
237 void vtbuf_init(struct vt_buf *, const term_pos_t *);
238 void vtbuf_grow(struct vt_buf *, const term_pos_t *, unsigned int);
239 void vtbuf_putchar(struct vt_buf *, const term_pos_t *, term_char_t);
240 void vtbuf_cursor_position(struct vt_buf *, const term_pos_t *);
241 void vtbuf_scroll_mode(struct vt_buf *vb, int yes);
242 void vtbuf_dirty(struct vt_buf *vb, const term_rect_t *area);
243 void vtbuf_undirty(struct vt_buf *, term_rect_t *);
244 void vtbuf_sethistory_size(struct vt_buf *, unsigned int);
245 void vtbuf_clearhistory(struct vt_buf *);
246 int vtbuf_iscursor(const struct vt_buf *vb, int row, int col);
247 void vtbuf_cursor_visibility(struct vt_buf *, int);
248 #ifndef SC_NO_CUTPASTE
249 int vtbuf_set_mark(struct vt_buf *vb, int type, int col, int row);
250 int vtbuf_get_marked_len(struct vt_buf *vb);
251 void vtbuf_extract_marked(struct vt_buf *vb, term_char_t *buf, int sz, int mark);
252 #endif
253 
254 #define	VTB_MARK_NONE		0
255 #define	VTB_MARK_END		1
256 #define	VTB_MARK_START		2
257 #define	VTB_MARK_WORD		3
258 #define	VTB_MARK_ROW		4
259 #define	VTB_MARK_EXTEND		5
260 #define	VTB_MARK_MOVE		6
261 
262 #define	VTBUF_SLCK_ENABLE(vb)	vtbuf_scroll_mode((vb), 1)
263 #define	VTBUF_SLCK_DISABLE(vb)	vtbuf_scroll_mode((vb), 0)
264 
265 #define	VTBUF_MAX_HEIGHT(vb) \
266 	((vb)->vb_history_size)
267 #define	VTBUF_GET_ROW(vb, r) \
268 	((vb)->vb_rows[((vb)->vb_roffset + (r)) % VTBUF_MAX_HEIGHT(vb)])
269 #define	VTBUF_GET_FIELD(vb, r, c) \
270 	((vb)->vb_rows[((vb)->vb_roffset + (r)) % VTBUF_MAX_HEIGHT(vb)][(c)])
271 #define	VTBUF_FIELD(vb, r, c) \
272 	((vb)->vb_rows[((vb)->vb_curroffset + (r)) % VTBUF_MAX_HEIGHT(vb)][(c)])
273 #define	VTBUF_ISCURSOR(vb, r, c) \
274 	vtbuf_iscursor((vb), (r), (c))
275 #define	VTBUF_DIRTYROW(mask, row) \
276 	((mask)->vbm_row & ((uint64_t)1 << ((row) % 64)))
277 #define	VTBUF_DIRTYCOL(mask, col) \
278 	((mask)->vbm_col & ((uint64_t)1 << ((col) % 64)))
279 #define	VTBUF_SPACE_CHAR(attr)	(' ' | (attr))
280 
281 #define	VHS_SET	0
282 #define	VHS_CUR	1
283 #define	VHS_END	2
284 int vthistory_seek(struct vt_buf *, int offset, int whence);
285 void vthistory_addlines(struct vt_buf *vb, int offset);
286 void vthistory_getpos(const struct vt_buf *, unsigned int *offset);
287 
288 /*
289  * Per-window datastructure.
290  */
291 
292 struct vt_window {
293 	struct vt_device	*vw_device;	/* (c) Device. */
294 	struct terminal		*vw_terminal;	/* (c) Terminal. */
295 	struct vt_buf		 vw_buf;	/* (u) Screen buffer. */
296 	struct vt_font		*vw_font;	/* (d) Graphical font. */
297 	term_rect_t		 vw_draw_area;	/* (?) Drawable area. */
298 	unsigned int		 vw_number;	/* (c) Window number. */
299 	int			 vw_kbdmode;	/* (?) Keyboard mode. */
300 	int			 vw_prev_kbdmode;/* (?) Previous mode. */
301 	int			 vw_kbdstate;	/* (?) Keyboard state. */
302 	int			 vw_grabbed;	/* (?) Grab count. */
303 	char			*vw_kbdsq;	/* Escape sequence queue*/
304 	unsigned int		 vw_flags;	/* (d) Per-window flags. */
305 	int			 vw_mouse_level;/* Mouse op mode. */
306 #define	VWF_BUSY	0x1	/* Busy reconfiguring device. */
307 #define	VWF_OPENED	0x2	/* TTY in use. */
308 #define	VWF_SCROLL	0x4	/* Keys influence scrollback. */
309 #define	VWF_CONSOLE	0x8	/* Kernel message console window. */
310 #define	VWF_VTYLOCK	0x10	/* Prevent window switch. */
311 #define	VWF_MOUSE_HIDE	0x20	/* Disable mouse events processing. */
312 #define	VWF_READY	0x40	/* Window fully initialized. */
313 #define	VWF_GRAPHICS	0x80	/* Window in graphics mode (KDSETMODE). */
314 #define	VWF_SWWAIT_REL	0x10000	/* Program wait for VT acquire is done. */
315 #define	VWF_SWWAIT_ACQ	0x20000	/* Program wait for VT release is done. */
316 	pid_t			 vw_pid;	/* Terminal holding process */
317 	struct proc		*vw_proc;
318 	struct vt_mode		 vw_smode;	/* switch mode */
319 	struct timeout_task	 vw_timeout_task_dead;
320 	struct vt_window	*vw_switch_to;
321 	int			 vw_bell_pitch;	/* (?) Bell pitch */
322 	sbintime_t		 vw_bell_duration; /* (?) Bell duration */
323 };
324 
325 #define	VT_AUTO		0		/* switching is automatic */
326 #define	VT_PROCESS	1		/* switching controlled by prog */
327 #define	VT_KERNEL	255		/* switching controlled in kernel */
328 
329 #define	IS_VT_PROC_MODE(vw)	((vw)->vw_smode.mode == VT_PROCESS)
330 
331 /*
332  * Per-device driver routines.
333  */
334 
335 typedef int vd_init_t(struct vt_device *vd);
336 typedef int vd_probe_t(struct vt_device *vd);
337 typedef void vd_fini_t(struct vt_device *vd, void *softc);
338 typedef void vd_postswitch_t(struct vt_device *vd);
339 typedef void vd_blank_t(struct vt_device *vd, term_color_t color);
340 typedef void vd_bitblt_text_t(struct vt_device *vd, const struct vt_window *vw,
341     const term_rect_t *area);
342 typedef void vd_invalidate_text_t(struct vt_device *vd,
343     const term_rect_t *area);
344 typedef void vd_bitblt_bmp_t(struct vt_device *vd, const struct vt_window *vw,
345     const uint8_t *pattern, const uint8_t *mask,
346     unsigned int width, unsigned int height,
347     unsigned int x, unsigned int y, term_color_t fg, term_color_t bg);
348 typedef int vd_bitblt_argb_t(struct vt_device *vd, const struct vt_window *vw,
349     const uint8_t *argb,
350     unsigned int width, unsigned int height,
351     unsigned int x, unsigned int y);
352 typedef int vd_fb_ioctl_t(struct vt_device *, u_long, caddr_t, struct thread *);
353 typedef int vd_fb_mmap_t(struct vt_device *, vm_ooffset_t, vm_paddr_t *, int,
354     vm_memattr_t *);
355 typedef void vd_drawrect_t(struct vt_device *, int, int, int, int, int,
356     term_color_t);
357 typedef void vd_setpixel_t(struct vt_device *, int, int, term_color_t);
358 typedef void vd_suspend_t(struct vt_device *);
359 typedef void vd_resume_t(struct vt_device *);
360 
361 struct vt_driver {
362 	char		 vd_name[16];
363 	/* Console attachment. */
364 	vd_probe_t	*vd_probe;
365 	vd_init_t	*vd_init;
366 	vd_fini_t	*vd_fini;
367 
368 	/* Drawing. */
369 	vd_blank_t	*vd_blank;
370 	vd_drawrect_t	*vd_drawrect;
371 	vd_setpixel_t	*vd_setpixel;
372 	vd_bitblt_text_t *vd_bitblt_text;
373 	vd_invalidate_text_t *vd_invalidate_text;
374 	vd_bitblt_bmp_t	*vd_bitblt_bmp;
375 	vd_bitblt_argb_t *vd_bitblt_argb;
376 
377 	/* Framebuffer ioctls, if present. */
378 	vd_fb_ioctl_t	*vd_fb_ioctl;
379 
380 	/* Framebuffer mmap, if present. */
381 	vd_fb_mmap_t	*vd_fb_mmap;
382 
383 	/* Update display setting on vt switch. */
384 	vd_postswitch_t	*vd_postswitch;
385 
386 	/* Suspend/resume handlers. */
387 	vd_suspend_t	*vd_suspend;
388 	vd_resume_t	*vd_resume;
389 
390 	/* Priority to know which one can override */
391 	int		vd_priority;
392 #define	VD_PRIORITY_DUMB	10
393 #define	VD_PRIORITY_GENERIC	100
394 #define	VD_PRIORITY_SPECIFIC	1000
395 
396 	/*
397 	 * Should vd_bitblt_text() be called after unlocking vtbuf? If true,
398 	 * characters are copied before vd_bitblt_bmp() is called.
399 	 *
400 	 * This is only valid when the default bitblt_text callback is used.
401 	 */
402 	bool		vd_bitblt_after_vtbuf_unlock;
403 };
404 
405 /*
406  * Console device madness.
407  *
408  * Utility macro to make early vt(4) instances work.
409  */
410 
411 extern struct vt_device vt_consdev;
412 void vt_upgrade(struct vt_device *vd);
413 
414 #define	PIXEL_WIDTH(w)	((w) / 8)
415 #define	PIXEL_HEIGHT(h)	((h) / 16)
416 
417 #ifndef VT_FB_MAX_WIDTH
418 #define	VT_FB_MAX_WIDTH	4096
419 #endif
420 #ifndef VT_FB_MAX_HEIGHT
421 #define	VT_FB_MAX_HEIGHT	2400
422 #endif
423 
424 /* name argument is not used yet. */
425 #define VT_DRIVER_DECLARE(name, drv) DATA_SET(vt_drv_set, drv)
426 
427 #ifndef SC_NO_CUTPASTE
428 struct vt_mouse_cursor {
429 	uint8_t map[64 * 64 / 8];
430 	uint8_t mask[64 * 64 / 8];
431 	uint8_t width;
432 	uint8_t height;
433 };
434 #endif
435 
436 const uint8_t	*vtfont_lookup(const struct vt_font *vf, term_char_t c);
437 struct vt_font	*vtfont_ref(struct vt_font *vf);
438 void		 vtfont_unref(struct vt_font *vf);
439 int		 vtfont_load(vfnt_t *f, struct vt_font **ret);
440 
441 /* Sysmouse. */
442 void sysmouse_process_event(mouse_info_t *mi);
443 #ifndef SC_NO_CUTPASTE
444 void vt_mouse_event(int type, int x, int y, int event, int cnt, int mlevel);
445 void vt_mouse_state(int show);
446 #endif
447 #define	VT_MOUSE_SHOW 1
448 #define	VT_MOUSE_HIDE 0
449 
450 /* Utilities. */
451 void	vt_compute_drawable_area(struct vt_window *);
452 void	vt_determine_colors(term_char_t c, int cursor,
453 	    term_color_t *fg, term_color_t *bg);
454 int	vt_is_cursor_in_area(const struct vt_device *vd,
455 	    const term_rect_t *area);
456 void	vt_termsize(struct vt_device *, struct vt_font *, term_pos_t *);
457 void	vt_winsize(struct vt_device *, struct vt_font *, struct winsize *);
458 
459 /* Logos-on-boot. */
460 #define	VT_LOGOS_DRAW_BEASTIE		0
461 #define	VT_LOGOS_DRAW_ALT_BEASTIE	1
462 #define	VT_LOGOS_DRAW_ORB		2
463 
464 extern int vt_draw_logo_cpus;
465 extern int vt_splash_cpu;
466 extern int vt_splash_ncpu;
467 extern int vt_splash_cpu_style;
468 extern int vt_splash_cpu_duration;
469 
470 extern const unsigned int vt_logo_sprite_height;
471 extern const unsigned int vt_logo_sprite_width;
472 
473 void vtterm_draw_cpu_logos(struct vt_device *);
474 
475 #endif /* !_DEV_VT_VT_H_ */
476