/* $OpenBSD: pcdisplayvar.h,v 1.13 2020/05/25 09:55:48 jsg Exp $ */
/* $NetBSD: pcdisplayvar.h,v 1.8 2000/01/25 02:44:03 ad Exp $ */

/*
 * Copyright (c) 1998
 *      Matthias Drochner.  All rights reserved.
 *
 * 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.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
 *
 */

struct pcdisplayscreen {
        struct pcdisplay_handle *hdl;

        const struct wsscreen_descr *type;

        int active;             /* currently displayed */
        u_int16_t *mem;         /* backing store for contents */

        int cursoron;           /* cursor displayed? */
#ifdef PCDISPLAY_SOFTCURSOR
        int cursortmp;          /* glyph & attribute behind software cursor */
#endif
        int vc_ccol, vc_crow;   /* current cursor position */

        int dispoffset;         /* offset of displayed area in video mem */
        int visibleoffset;
};

struct pcdisplay_handle {
        bus_space_tag_t ph_iot, ph_memt;
        bus_space_handle_t ph_ioh_6845, ph_memh;
};

static inline u_int8_t _pcdisplay_6845_read(struct pcdisplay_handle *, int);
static inline void _pcdisplay_6845_write(struct pcdisplay_handle *,
                                              int, u_int8_t);

static inline u_int8_t
_pcdisplay_6845_read(struct pcdisplay_handle *ph, int reg)
{
        bus_space_write_1(ph->ph_iot, ph->ph_ioh_6845, MC6845_INDEX, reg);
        return (bus_space_read_1(ph->ph_iot, ph->ph_ioh_6845, MC6845_DATA));
}

static inline void
_pcdisplay_6845_write(struct pcdisplay_handle *ph, int reg, u_int8_t val)
{
        bus_space_write_1(ph->ph_iot, ph->ph_ioh_6845, MC6845_INDEX, reg);
        bus_space_write_1(ph->ph_iot, ph->ph_ioh_6845, MC6845_DATA, val);
}

#define pcdisplay_6845_read(ph, reg) \
        _pcdisplay_6845_read(ph, offsetof(struct reg_mc6845, reg))
#define pcdisplay_6845_write(ph, reg, val) \
        _pcdisplay_6845_write(ph, offsetof(struct reg_mc6845, reg), val)

void    pcdisplay_cursor_init(struct pcdisplayscreen *, int);
void    pcdisplay_cursor_reset(struct pcdisplayscreen *);
int     pcdisplay_cursor(void *, int, int, int);
int     pcdisplay_mapchar(void *, int, unsigned int *);
int     pcdisplay_putchar(void *, int, int, u_int, uint32_t);
struct wsdisplay_charcell;
int     pcdisplay_getchar(void *, int, int, struct wsdisplay_charcell *);
int     pcdisplay_copycols(void *, int, int, int,int);
int     pcdisplay_erasecols(void *, int, int, int, uint32_t);
int     pcdisplay_copyrows(void *, int, int, int);
int     pcdisplay_eraserows(void *, int, int, uint32_t);