freebsd-skq/sys/dev/fb/splash_txt.c

/*-
 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
 *
 * Copyright (c) 1999 Michael Smith <msmith@freebsd.org>
 * Copyright (c) 1999 Kazutaka YOKOTA <yokota@freebsd.org>
 * Copyright (c) 2005 Antony Mawer <antony@mawer.org>
 * 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 AUTHORS 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 AUTHORS 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.
 *
 * $FreeBSD$
 */

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/module.h>
#include <sys/kernel.h>
#include <sys/consio.h>
#include <sys/fbio.h>

#include <machine/pc/display.h>

#include <dev/fb/fbreg.h>
#include <dev/fb/splashreg.h>
#include <dev/syscons/syscons.h>

static int splash_on = FALSE;

static int txt_init(video_adapter_t *adp);
static int txt_end(video_adapter_t *adp);
static int txt_splash(video_adapter_t * adp, const int on);

/* These are rows by columns of the text-mode display device. */
#define BIN_IMAGE_WIDTH		80
#define BIN_IMAGE_HEIGHT	25

static splash_decoder_t txt_decoder = {
       .name = "splash_txt",
       .init = txt_init,
       .term = txt_end,
       .splash = txt_splash,
       .data_type = SPLASH_IMAGE,
};

SPLASH_DECODER(splash_txt, txt_decoder);

static void
draw_text_splash(sc_softc_t *sc)
{
	u_int x, y;
	u_char ch, attr;
	u_char *pdata = txt_decoder.data;

	/* Init failed. */
	if (txt_decoder.data == NULL)
		return;
	for (y = 0; y < BIN_IMAGE_HEIGHT; y++) {
		for (x = 0; x < BIN_IMAGE_WIDTH; x++) {
			ch = *pdata++;
			attr = *pdata++;
			sc_vtb_putc(&sc->cur_scp->scr,
			    (y * sc->cur_scp->xsize) + x,
			    sc->scr_map[ch], (int)attr << 8);
		}
	}
}

static int
txt_init(video_adapter_t *adp)
{

	/* Ensure that the image data exists. */
	if (txt_decoder.data == NULL || txt_decoder.data_size <= 0) {
		printf("splash_txt: No ASCII bitmap file found\n");
		return (ENODEV);
	}
	return (0);
}

static int
txt_end(video_adapter_t *adp)
{

	return (0);
}

static int
txt_splash(video_adapter_t *adp, const int on)
{
	sc_softc_t *sc;
	scr_stat *scp;

	sc = sc_find_softc(adp, NULL);
	if (sc == NULL)
		return (EAGAIN);
	scp = sc->cur_scp;
	if (on) {
		if (!splash_on) {
			if (adp->va_info.vi_flags & V_INFO_GRAPHICS)
				return EAGAIN;
			/* Clear screen and set border colour. */
			sc_vtb_clear(&scp->scr, sc->scr_map[0x20],
			    (FG_LIGHTGREY | BG_BLACK) << 8);
			(*vidsw[adp->va_index]->set_hw_cursor)(adp, -1, -1);
			sc_set_border(scp, 0);
			splash_on = TRUE;
			/* Display the splash screen. */
			draw_text_splash(sc);
		}
		return (0);
	} else {
		/* The video mode will be restored by the caller. */
		splash_on = FALSE;
		return (0);
	}
}