FreeBSD/Linux Kernel Cross Reference
sys/dev/syscons/logo/logo_saver.c

     /*-
      * SPDX-License-Identifier: BSD-3-Clause
      *
      * Copyright (c) 1998 Dag-Erling Coïdan Smørgrav
      * 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.
     *
     * $FreeBSD$
     */
    
    #include <sys/param.h>
    #include <sys/systm.h>
    #include <sys/kernel.h>
    #include <sys/module.h>
    #include <sys/syslog.h>
    #include <sys/consio.h>
    #include <sys/fbio.h>
    
    #include <dev/fb/fbreg.h>
    #include <dev/fb/splashreg.h>
    #include <dev/syscons/syscons.h>
    
    #define SAVER_NAME       "logo_saver"
    
    #define SET_ORIGIN(adp, o) do {                         \
            int oo = o;                                     \
            if (oo != last_origin)                          \
                vidd_set_win_org(adp, last_origin = oo);    \
            } while (0)
    
    extern unsigned int      logo_w;
    extern unsigned int      logo_h;
    extern unsigned char     logo_pal[];
    extern unsigned char     logo_img[];
    extern unsigned int      logo_img_size;
    
    static u_char           *vid;
    static int               banksize, scrmode, bpsl, scrw, scrh;
    static int               blanked;
    
    static void
    logo_blit(video_adapter_t *adp, int x, int y)
    {
            int d, l, o, p;
            int last_origin = -1;
    
            for (o = 0, p = y * bpsl + x; p > banksize; p -= banksize)
                    o += banksize;
            SET_ORIGIN(adp, o);
    
            for (d = 0; d < logo_img_size; d += logo_w) {
                    if (p + logo_w < banksize) {
                            bcopy(logo_img + d, vid + p, logo_w);
                            p += bpsl;
                    } else if (p < banksize) {
                            l = banksize - p;
                            bcopy(logo_img + d, vid + p, l);
                            SET_ORIGIN(adp, (o += banksize));
                            bcopy(logo_img + d + l, vid, logo_w - l);
                            p += bpsl - banksize;
                    } else {
                            p -= banksize;
                            SET_ORIGIN(adp, (o += banksize));
                            bcopy(logo_img + d, vid + p, logo_w);
                            p += bpsl;
                    }
            }
    }
    
    static void
    logo_update(video_adapter_t *adp)
    {
            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(adp, xpos, ypos);
   }
   
   static int
   logo_saver(video_adapter_t *adp, int blank)
   {
           int pl;
   
           if (blank) {
                   /* switch to graphics mode */
                   if (blanked <= 0) {
                           pl = splhigh();
                           vidd_set_mode(adp, scrmode);
                           vidd_load_palette(adp, logo_pal);
                           vidd_set_border(adp, 0);
                           blanked++;
                           vid = (u_char *)adp->va_window;
                           banksize = adp->va_window_size;
                           bpsl = adp->va_line_width;
                           splx(pl);
                           vidd_clear(adp);
                   }
                   logo_update(adp);
           } else {
                   blanked = 0;
           }
           return (0);
   }
   
   static int
   logo_init(video_adapter_t *adp)
   {
           video_info_t info;
   
           if (!vidd_get_info(adp, M_VESA_CG800x600, &info)) {
                   scrmode = M_VESA_CG800x600;
           } else if (!vidd_get_info(adp, M_VGA_CG320, &info)) {
                   scrmode = M_VGA_CG320;
           } else {
                   log(LOG_NOTICE,
                       "%s: the console does not support M_VGA_CG320\n",
                       SAVER_NAME);
                   return (ENODEV);
           }
   
           scrw = info.vi_width;
           scrh = info.vi_height;
   
           return (0);
   }
   
   static int
   logo_term(video_adapter_t *adp)
   {
           return (0);
   }
   
   static scrn_saver_t logo_module = {
           SAVER_NAME,
           logo_init,
           logo_term,
           logo_saver,
           NULL
   };
   
   #ifdef BEASTIE_LOGO
   SAVER_MODULE(beastie_saver, logo_module);
   #else
   SAVER_MODULE(logo_saver, logo_module);
   #endif

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