sys/dev/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  * $FreeBSD$
  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 #define NUM_STARS       50
  45
  46 static int blanked;
  47
  48 /*
  49  * Alternate saver that got its inspiration from a well known utility
  50  * package for an inferior^H^H^H^H^H^Hfamous OS.
  51  */
  52 static int
  53 star_saver(video_adapter_t *adp, int blank)
  54 {
  55         sc_softc_t      *sc;
  56         scr_stat        *scp;
  57         int             cell, i;
  58         static u_char   pattern[] = {"...........++++***   "};
  59         static char     color16[] = {FG_DARKGREY, FG_LIGHTGREY,
  60                                      FG_WHITE, FG_LIGHTCYAN};
  61         static char     color8[] = {FG_BLUE, FG_BROWN,
  62                                     FG_LIGHTGREY, FG_CYAN};
  63         static char     *colors;
  64         static u_short  stars[NUM_STARS][2];
  65
  66         sc = sc_find_softc(adp, NULL);
  67         if (sc == NULL)
  68                 return EAGAIN;
  69         scp = sc->cur_scp;
  70
  71         if (blank) {
  72                 if (adp->va_info.vi_flags & V_INFO_GRAPHICS)
  73                         return EAGAIN;
  74                 if (!blanked) {
  75                         switch (adp->va_mode) {
  76                         case M_PC98_80x25:
  77                         case M_PC98_80x30:
  78                                 colors = color8;
  79                                 break;
  80                         default:
  81                                 colors = color16;
  82                                 break;
  83                         }
  84
  85                         /* clear the screen and set the border color */
  86                         sc_vtb_clear(&scp->scr, sc->scr_map[0x20],
  87                                      (FG_LIGHTGREY | BG_BLACK) << 8);
  88                         vidd_set_hw_cursor(adp, -1, -1);
  89                         sc_set_border(scp, 0);
  90                         blanked = TRUE;
  91                         for(i=0; i<NUM_STARS; i++) {
  92                                 stars[i][0] =
  93                                         random() % (scp->xsize*scp->ysize);
  94                                 stars[i][1] = 0;
  95                         }
  96                 }
  97                 cell = random() % NUM_STARS;
  98                 sc_vtb_putc(&scp->scr, stars[cell][0],
  99                             sc->scr_map[pattern[stars[cell][1]]],
 100                             colors[random()%sizeof(color16)] << 8);
 101                 if ((stars[cell][1]+=(random()%4)) >= sizeof(pattern)-1) {
 102                         stars[cell][0] = random() % (scp->xsize*scp->ysize);
 103                         stars[cell][1] = 0;
 104                 }
 105         } else
 106                 blanked = FALSE;
 107
 108         return 0;
 109 }
 110
 111 static int
 112 star_init(video_adapter_t *adp)
 113 {
 114         blanked = FALSE;
 115         return 0;
 116 }
 117
 118 static int
 119 star_term(video_adapter_t *adp)
 120 {
 121         return 0;
 122 }
 123
 124 static scrn_saver_t star_module = {
 125         "star_saver", star_init, star_term, star_saver, NULL,
 126 };
 127
 128 SAVER_MODULE(star_saver, star_module);