sys/dev/misc/syscons/star/star_saver.c

   1 /*-
   2  * Copyright (c) 1995-1998 Søren Schmidt
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer,
  10  *    without modification, immediately at the beginning of the file.
  11  * 2. Redistributions in binary form must reproduce the above copyright
  12  *    notice, this list of conditions and the following disclaimer in the
  13  *    documentation and/or other materials provided with the distribution.
  14  * 3. The name of the author may not be used to endorse or promote products
  15  *    derived from this software without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  18  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  19  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  20  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  21  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  22  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  23  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  24  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  26  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27  *
  28  * $FreeBSD: src/sys/modules/syscons/star/star_saver.c,v 1.23.2.2 2001/05/06 05:44:29 nyan Exp $
  29  */
  30
  31 #include <sys/param.h>
  32 #include <sys/systm.h>
  33 #include <sys/kernel.h>
  34 #include <sys/module.h>
  35 #include <sys/consio.h>
  36 #include <sys/fbio.h>
  37
  38 #include <machine/pc/display.h>
  39
  40 #include <dev/fb/fbreg.h>
  41 #include <dev/fb/splashreg.h>
  42 #include <dev/syscons/syscons.h>
  43
  44 #ifdef PC98
  45 #include <pc98/pc98/pc98_machdep.h>
  46 #endif
  47
  48 #define NUM_STARS       50
  49
  50 static int blanked;
  51
  52 /*
  53  * Alternate saver that got its inspiration from a well known utility
  54  * package for an inferior^H^H^H^H^H^Hfamous OS.
  55  */
  56 static int
  57 star_saver(video_adapter_t *adp, int blank)
  58 {
  59         sc_softc_t      *sc;
  60         scr_stat        *scp;
  61         int             cell, i;
  62         static u_char   pattern[] = {"...........++++***   "};
  63 #ifndef PC98
  64         static char     colors[] = {FG_DARKGREY, FG_LIGHTGREY,
  65                                     FG_WHITE, FG_LIGHTCYAN};
  66 #else
  67         static char     colors[] = {FG_BLUE, FG_LIGHTGREY,
  68                                     FG_LIGHTGREY, FG_CYAN};
  69 #endif /* PC98 */
  70         static u_short  stars[NUM_STARS][2];
  71
  72         sc = sc_find_softc(adp, NULL);
  73         if (sc == NULL)
  74                 return EAGAIN;
  75         scp = sc->cur_scp;
  76
  77         if (blank) {
  78                 if (adp->va_info.vi_flags & V_INFO_GRAPHICS)
  79                         return EAGAIN;
  80                 if (!blanked) {
  81 #ifdef PC98
  82                         if (epson_machine_id == 0x20) {
  83                                 outb(0x43f, 0x42);
  84                                 outb(0x0c17, inb(0xc17) & ~0x08);
  85                                 outb(0x43f, 0x40);
  86                         }
  87 #endif /* PC98 */
  88                         /* clear the screen and set the border color */
  89                         sc_vtb_clear(&scp->scr, sc->scr_map[0x20],
  90                                      (FG_LIGHTGREY | BG_BLACK) << 8);
  91                         (*vidsw[adp->va_index]->set_hw_cursor)(adp, -1, -1);
  92                         sc_set_border(scp, 0);
  93                         blanked = TRUE;
  94                         for(i=0; i<NUM_STARS; i++) {
  95                                 stars[i][0] =
  96                                         random() % (scp->xsize*scp->ysize);
  97                                 stars[i][1] = 0;
  98                         }
  99                 }
 100                 cell = random() % NUM_STARS;
 101                 sc_vtb_putc(&scp->scr, stars[cell][0],
 102                             sc->scr_map[pattern[stars[cell][1]]],
 103                             colors[random()%sizeof(colors)] << 8);
 104                 if ((stars[cell][1]+=(random()%4)) >= sizeof(pattern)-1) {
 105                         stars[cell][0] = random() % (scp->xsize*scp->ysize);
 106                         stars[cell][1] = 0;
 107                 }
 108         }
 109         else {
 110 #ifdef PC98
 111                 if (epson_machine_id == 0x20) {
 112                         outb(0x43f, 0x42);
 113                         outb(0x0c17, inb(0xc17) | 0x08);
 114                         outb(0x43f, 0x40);
 115                 }
 116 #endif /* PC98 */
 117                 blanked = FALSE;
 118         }
 119         return 0;
 120 }
 121
 122 static int
 123 star_init(video_adapter_t *adp)
 124 {
 125         blanked = FALSE;
 126         return 0;
 127 }
 128
 129 static int
 130 star_term(video_adapter_t *adp)
 131 {
 132         return 0;
 133 }
 134
 135 static scrn_saver_t star_module = {
 136         "star_saver", star_init, star_term, star_saver, NULL,
 137 };
 138
 139 SAVER_MODULE(star_saver, star_module);