freebsd-dev/sys/modules/syscons/logo/logo_saver.c

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/*-
* Copyright (c) 1998 Dag-Erling Co<EFBFBD>dan Sm<EFBFBD>rgrav
* 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
* in this position and unchanged.
* 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. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission
*
* 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.
*
* $Id$
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/module.h>
#include <sys/syslog.h>
#include <machine/md_var.h>
#include <saver.h>
static u_char *vid;
static int banksize;
static u_char save_pal[768];
#define SCRW 800
#define SCRH 600
#include "logo.c"
#define set_origin(scp, o) (*biosvidsw.set_win_org)((scp)->adp, o)
static void
logo_blit(int x, int y)
{
int d, l, o, p;
for (o = 0, p = y * SCRW + x; p > banksize; p -= banksize)
o += banksize;
set_origin(cur_console, o);
for (d = 0; d < sizeof logo_img; d += logo_w) {
if (p + logo_w < banksize) {
bcopy(logo_img + d, vid + p, logo_w);
p += SCRW;
} else if (p < banksize) {
l = banksize - p;
bcopy(logo_img + d, vid + p, l);
set_origin(cur_console, (o += banksize));
bcopy(logo_img + d + l, vid, logo_w - l);
p += SCRW - banksize;
} else {
p -= banksize;
set_origin(cur_console, (o += banksize));
bcopy(logo_img + d, vid + p, logo_w);
p += SCRW;
}
}
}
static void
logo_update(void)
{
static int xpos = 0, ypos = 0;
static int xinc = 1, yinc = 1;
/* Turn when you hit the edge */
if ((xpos + logo_w + xinc > SCRW) || (xpos + xinc < 0)) xinc = -xinc;
if ((ypos + logo_h + yinc > SCRH) || (ypos + yinc < 0)) yinc = -yinc;
xpos += xinc; ypos += yinc;
/* XXX Relies on margin around logo to erase trail */
logo_blit(xpos, ypos);
}
static void
logo_saver(int blank)
{
scr_stat *scp = cur_console;
static int saved_mode;
int pl;
if (blank) {
/* switch to graphics mode */
if (scrn_blanked <= 0) {
pl = splhigh();
saved_mode = scp->mode;
scp->mode = M_VESA_CG800x600;
scp->status |= SAVER_RUNNING|GRAPHICS_MODE;
save_palette(scp, (char *)save_pal);
set_mode(scp);
load_palette(scp, (char *)logo_pal);
scrn_blanked++;
vid = (u_char *)Crtat;
splx(pl);
/* XXX should clear all banks */
}
logo_update();
} else {
/* return to previous video mode */
if (scrn_blanked > 0) {
if (saved_mode) {
pl = splhigh();
scrn_blanked = 0;
scp->mode = saved_mode;
scp->status &= ~(SAVER_RUNNING|GRAPHICS_MODE);
set_mode(scp);
load_palette(scp, (char *)save_pal);
saved_mode = 0;
splx(pl);
}
}
}
}
static int
logo_saver_load(void)
{
video_info_t info;
/* check that the console is capable of running in 800x600x256 */
if ((*biosvidsw.get_info)(cur_console->adp, M_VESA_CG800x600, &info)) {
log(LOG_NOTICE, "logo_saver: the console does not support M_VESA_CG800x600\n");
return ENODEV;
}
/* is it possible for window_size not to be a multiple of window_gran? */
while (banksize + info.vi_window_gran <= info.vi_window_size)
banksize += info.vi_window_gran;
return add_scrn_saver(logo_saver);
}
static int
logo_saver_unload(void)
{
return remove_scrn_saver(logo_saver);
}
SAVER_MODULE(logo_saver);