/* $NetBSD: wsfontdev.c,v 1.20 2022/05/12 23:17:42 uwe Exp $ */

/*
* Copyright (c) 2001
*      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 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 AUTHOR 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.
*/

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: wsfontdev.c,v 1.20 2022/05/12 23:17:42 uwe Exp $");

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/conf.h>
#include <sys/fcntl.h>
#include <sys/ioctl.h>
#include <sys/malloc.h>
#include <sys/event.h>

#include <dev/wsfont/wsfont.h>
#include <dev/wscons/wsconsio.h> /* XXX */

#include "ioconf.h"

#ifdef WSFONT_DEBUG
#define DPRINTF printf
#else
#define DPRINTF while (0) printf
#endif
static int wsfont_isopen;


void
wsfontattach(int n)
{

       wsfont_init();
}

static int
wsfontopen(dev_t dev, int flag, int mode,
   struct lwp *l)
{

       if (wsfont_isopen)
               return (EBUSY);
       wsfont_isopen = 1;
       return (0);
}

static int
wsfontclose(dev_t dev, int flag, int mode,
   struct lwp *l)
{

       wsfont_isopen = 0;
       return (0);
}

static void
fontmatchfunc(struct wsdisplay_font *f, void *cookie, int fontcookie)
{
       struct wsdisplayio_fontinfo *fi = cookie;
       struct wsdisplayio_fontdesc fd;
       int offset;

       DPRINTF("%s %dx%d\n", f->name, f->fontwidth, f->fontheight);
       if (fi->fi_fonts != NULL && fi->fi_buffersize > 0) {
               memset(&fd, 0, sizeof(fd));
               strncpy(fd.fd_name, f->name, sizeof(fd.fd_name) - 1);
               fd.fd_width = f->fontwidth;
               fd.fd_height = f->fontheight;
               offset = sizeof(struct wsdisplayio_fontdesc) * (fi->fi_numentries + 1);
               if (offset > fi->fi_buffersize) {
                       fi->fi_fonts = NULL;
               } else
                       copyout(&fd, &fi->fi_fonts[fi->fi_numentries],
                           sizeof(struct wsdisplayio_fontdesc));
       }
       fi->fi_numentries++;
}

static int
wsdisplayio_listfonts(struct wsdisplayio_fontinfo *f)
{
       void *addr = f->fi_fonts;
       DPRINTF("%s: %d %d\n", __func__, f->fi_buffersize, f->fi_numentries);
       f->fi_numentries = 0;
       wsfont_walk(fontmatchfunc, f);
       /* check if we ran out of buffer space */
       if (f->fi_fonts == NULL && addr != NULL) return ENOMEM;
       return 0;
}

static int
wsfontioctl(dev_t dev, u_long cmd, void *data, int flag,
   struct lwp *l)
{
       char nbuf[64];
       void *buf;
       int res;

       switch (cmd) {
       case WSDISPLAYIO_LDFONT:
#define d ((struct wsdisplay_font *)data)
               if ((flag & FWRITE) == 0)
                       return EPERM;

               if (d->name) {
                       res = copyinstr(d->name, nbuf, sizeof(nbuf), 0);
                       if (res)
                               return (res);
                       d->name = nbuf;
               } else
                       d->name = "loaded"; /* ??? */
               buf = malloc(d->fontheight * d->stride * d->numchars,
                            M_DEVBUF, M_WAITOK);
               res = copyin(d->data, buf,
                            d->fontheight * d->stride * d->numchars);
               if (res) {
                       free(buf, M_DEVBUF);
                       return (res);
               }
               d->data = buf;
               res = wsfont_add(d, 1);
               free(buf, M_DEVBUF);
#undef d
               return (res);
       case WSDISPLAYIO_LISTFONTS:
               return wsdisplayio_listfonts(data);
       default:
               return (EINVAL);
       }
}

const struct cdevsw wsfont_cdevsw = {
       .d_open = wsfontopen,
       .d_close = wsfontclose,
       .d_read = noread,
       .d_write = nowrite,
       .d_ioctl = wsfontioctl,
       .d_stop = nostop,
       .d_tty = notty,
       .d_poll = nopoll,
       .d_mmap = nommap,
       .d_kqfilter = nokqfilter,
       .d_discard = nodiscard,
       .d_flag = D_OTHER
};