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wsdisplay_vconsvar.h revision 1.2 
      1 /*	$NetBSD: wsdisplay_vconsvar.h,v 1.2 2006/02/18 18:56:05 jmcneill 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  * 3. All advertising materials mentioning features or use of this software
     16  *    must display the following acknowledgement:
     17  *        This product includes software developed by the NetBSD
     18  *        Foundation, Inc. and its contributors.
     19  * 4. Neither the name of The NetBSD Foundation nor the names of its
     20  *    contributors may be used to endorse or promote products derived
     21  *    from this software without specific prior written permission.
     22  *
     23  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     24  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     25  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     26  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     27  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     28  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     29  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     30  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     31  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     32  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     33  * POSSIBILITY OF SUCH DAMAGE.
     34  */
     35 
     36 #ifndef _WSDISPLAY_VCONS_H_
     37 #define _WSDISPLAY_VCONS_H_
     38 
     39 struct vcons_data;
     40 
     41 struct vcons_screen {
     42 	struct rasops_info scr_ri;
     43 	LIST_ENTRY(vcons_screen) next;
     44 	void *scr_cookie;
     45 	struct vcons_data *scr_vd;
     46 	struct vcons_data *scr_origvd;
     47 	const struct wsscreen_descr *scr_type;
     48 	uint16_t *scr_chars;
     49 	long *scr_attrs;
     50 	long scr_defattr;
     51 	/* static flags set by the driver */
     52 	uint32_t scr_flags;
     53 #define VCONS_NO_REDRAW		1	/* don't readraw in switch_screen */
     54 #define	VCONS_SCREEN_IS_STATIC	2	/* don't free() this vcons_screen */
     55 #define VCONS_SWITCH_NEEDS_POLLING 4	/* rasops can overlap so we need to
     56 					 * poll the busy flag when switching
     57 					 * - for drivers that use software
     58 					 * drawing */
     59 	/* status flags used by vcons */
     60 	uint32_t scr_status;
     61 #define VCONS_IS_VISIBLE	1	/* this screen is currently visible */
     62 	/* non zero when some rasops operation is in progress */
     63 	int scr_busy;
     64 };
     65 
     66 #define SCREEN_IS_VISIBLE(scr) (((scr)->scr_status & VCONS_IS_VISIBLE) != 0)
     67 #define SCREEN_IS_BUSY(scr) ((scr)->scr_busy != 0)
     68 #define SCREEN_BUSY(scr) ((scr)->scr_busy = 1)
     69 #define SCREEN_IDLE(scr) ((scr)->scr_busy = 0)
     70 #define SCREEN_VISIBLE(scr) ((scr)->scr_status |= VCONS_IS_VISIBLE)
     71 #define SCREEN_INVISIBLE(scr) ((scr)->scr_status &= ~VCONS_IS_VISIBLE)
     72 
     73 struct vcons_data {
     74 	/* usually the drivers softc */
     75 	void *cookie;
     76 
     77 	/*
     78 	 * setup the rasops part of the passed vcons_screen, like
     79 	 * geometry, framebuffer address, font, characters, acceleration.
     80 	 * we pass the cookie as 1st parameter
     81 	 */
     82 	void (*init_screen)(void *, struct vcons_screen *, int,
     83 	    long *);
     84 
     85 	/* rasops */
     86 	void (*copycols)(void *, int, int, int, int);
     87 	void (*erasecols)(void *, int, int, int, long);
     88 	void (*copyrows)(void *, int, int, int);
     89 	void (*eraserows)(void *, int, int, long);
     90 	void (*putchar)(void *, int, int, u_int, long);
     91 	void (*cursor)(void *, int, int, int);
     92 	/* called before cvons_redraw_screen */
     93 	void (*show_screen_cb)(struct vcons_screen *);
     94 	/* virtual screen management stuff */
     95 	void (*switch_cb)(void *, int, int);
     96 	void *switch_cb_arg;
     97 	struct callout switch_callout;
     98 	uint32_t switch_pending;
     99 	LIST_HEAD(, vcons_screen) screens;
    100 	struct vcons_screen *active, *wanted;
    101 	const struct wsscreen_descr *currenttype;
    102 #ifdef DIAGNOSTIC
    103 	int switch_poll_count;
    104 #endif
    105 };
    106 
    107 int	vcons_init(struct vcons_data *, void *cookie, struct wsscreen_descr *,
    108     struct wsdisplay_accessops *);
    109 
    110 int	vcons_init_screen(struct vcons_data *, struct vcons_screen *, int,
    111     long *);
    112 
    113 void	vcons_redraw_screen(struct vcons_screen *);
    114 
    115 
    116 
    117 #endif /* _WSDISPLAY_VCONS_H_ */
    118