sys/dev/wscons/wsdisplay_vconsvar.h

   1 /*      $NetBSD: wsdisplay_vconsvar.h,v 1.9 2008/04/28 20:24:01 martin 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_ */