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wsdisplay_vconsvar.h revision 1.10 
      1 /*	$NetBSD: wsdisplay_vconsvar.h,v 1.10 2009/08/20 02:01:08 macallan Exp $ */
      2 
      3 /*-
      4  * Copyright (c) 2005, 2006 Michael Lorenz
      5  * All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  *
     16  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     17  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     18  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     19  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     20  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     21  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     22  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     23  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     24  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     25  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     26  * POSSIBILITY OF SUCH DAMAGE.
     27  */
     28 
     29 #ifndef _WSDISPLAY_VCONS_H_
     30 #define _WSDISPLAY_VCONS_H_
     31 
     32 #include "opt_wsdisplay_compat.h"
     33 #include "opt_vcons.h"
     34 
     35 struct vcons_data;
     36 
     37 struct vcons_screen {
     38 	struct rasops_info scr_ri;
     39 	LIST_ENTRY(vcons_screen) next;
     40 	void *scr_cookie;
     41 	struct vcons_data *scr_vd;
     42 	struct vcons_data *scr_origvd;
     43 	const struct wsscreen_descr *scr_type;
     44 	uint16_t *scr_chars;
     45 	long *scr_attrs;
     46 	long scr_defattr;
     47 	/* static flags set by the driver */
     48 	uint32_t scr_flags;
     49 #define VCONS_NO_REDRAW		1	/* don't readraw in switch_screen */
     50 #define	VCONS_SCREEN_IS_STATIC	2	/* don't free() this vcons_screen */
     51 #define VCONS_SWITCH_NEEDS_POLLING 4	/* rasops can overlap so we need to
     52 					 * poll the busy flag when switching
     53 					 * - for drivers that use software
     54 					 * drawing */
     55 #define VCONS_DONT_DRAW		8	/* don't draw on this screen at all */
     56 	/* status flags used by vcons */
     57 	uint32_t scr_status;
     58 #define VCONS_IS_VISIBLE	1	/* this screen is currently visible */
     59 	/* non zero when some rasops operation is in progress */
     60 	int scr_busy;
     61 #ifdef WSDISPLAY_SCROLLSUPPORT
     62 	int scr_lines_in_buffer;
     63 	int scr_current_line;
     64 	int scr_line_wanted;
     65 	int scr_offset_to_zero;
     66 	int scr_current_offset;
     67 #endif
     68 };
     69 
     70 #define SCREEN_IS_VISIBLE(scr) (((scr)->scr_status & VCONS_IS_VISIBLE) != 0)
     71 #define SCREEN_IS_BUSY(scr) ((scr)->scr_busy != 0)
     72 #define SCREEN_CAN_DRAW(scr) (((scr)->scr_flags & VCONS_DONT_DRAW) == 0)
     73 #define SCREEN_BUSY(scr) ((scr)->scr_busy = 1)
     74 #define SCREEN_IDLE(scr) ((scr)->scr_busy = 0)
     75 #define SCREEN_VISIBLE(scr) ((scr)->scr_status |= VCONS_IS_VISIBLE)
     76 #define SCREEN_INVISIBLE(scr) ((scr)->scr_status &= ~VCONS_IS_VISIBLE)
     77 #define SCREEN_DISABLE_DRAWING(scr) ((scr)->scr_flags |= VCONS_DONT_DRAW)
     78 #define SCREEN_ENABLE_DRAWING(scr) ((scr)->scr_flags &= ~VCONS_DONT_DRAW)
     79 
     80 struct vcons_data {
     81 	/* usually the drivers softc */
     82 	void *cookie;
     83 
     84 	/*
     85 	 * setup the rasops part of the passed vcons_screen, like
     86 	 * geometry, framebuffer address, font, characters, acceleration.
     87 	 * we pass the cookie as 1st parameter
     88 	 */
     89 	void (*init_screen)(void *, struct vcons_screen *, int,
     90 	    long *);
     91 
     92 	/* accessops */
     93 	int (*ioctl)(void *, void *, u_long, void *, int, struct lwp *);
     94 
     95 	/* rasops */
     96 	void (*copycols)(void *, int, int, int, int);
     97 	void (*erasecols)(void *, int, int, int, long);
     98 	void (*copyrows)(void *, int, int, int);
     99 	void (*eraserows)(void *, int, int, long);
    100 	void (*putchar)(void *, int, int, u_int, long);
    101 	void (*cursor)(void *, int, int, int);
    102 	/* called before vcons_redraw_screen */
    103 	void (*show_screen_cb)(struct vcons_screen *);
    104 	/* virtual screen management stuff */
    105 	void (*switch_cb)(void *, int, int);
    106 	void *switch_cb_arg;
    107 #ifdef VCONS_SWITCH_ASYNC
    108 	lwp_t *redraw_thread;
    109 	int start_drawing, done_drawing;	/* for the drawing thread */
    110 #endif
    111 	struct callout switch_callout;
    112 	uint32_t switch_pending;
    113 	LIST_HEAD(, vcons_screen) screens;
    114 	struct vcons_screen *active, *wanted;
    115 	const struct wsscreen_descr *currenttype;
    116 	int switch_poll_count;
    117 };
    118 
    119 int	vcons_init(struct vcons_data *, void *cookie, struct wsscreen_descr *,
    120     struct wsdisplay_accessops *);
    121 
    122 int	vcons_init_screen(struct vcons_data *, struct vcons_screen *, int,
    123     long *);
    124 
    125 void	vcons_redraw_screen(struct vcons_screen *);
    126 
    127 void	vcons_replay_msgbuf(struct vcons_screen *);
    128 
    129 #endif /* _WSDISPLAY_VCONS_H_ */
    130