/*
 * Copyright (c) 1993 Christian E. Hopps
 * All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * Christian E. Hopps.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by the University of
 *	California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 */

/* The view major device is a placeholder device.  It serves
 * simply to map the semantics of a graphics dipslay to
 * the semantics of a character block device.  In other
 * words the graphics system as currently built does not like to be
 * refered to by open/close/ioctl.  This device serves as
 * a interface to graphics. */

struct view_softc {
    struct  view_size size;
    view_t *view;

    dmode_t   *mode;  
    monitor_t *monitor;

    pid_t   lock_process;
    int     flags;
};

enum view_unit_flag_bits {
    VUB_OPEN,
    VUB_ADDED,
    VUB_DISPLAY,
    VUB_LAST_BIT
};

enum view_unit_flags {
    VUF_OPEN = 1<<VUB_OPEN,
    VUF_ADDED = 1<<VUB_ADDED,
    VUF_DISPLAY = 1<<VUB_DISPLAY,
    VUF_MASK = ((1<<VUB_LAST_BIT)-1)
};