From owner-freebsd-chat Sun Nov 4 15:25:33 2001 Delivered-To: freebsd-chat@freebsd.org Received: from zork.punq.net (punq.net [207.154.84.94]) by hub.freebsd.org (Postfix) with SMTP id 7F75E37B405 for ; Sun, 4 Nov 2001 15:25:26 -0800 (PST) Received: (qmail 13216 invoked by uid 1000); 4 Nov 2001 23:18:41 -0000 Date: Sun, 4 Nov 2001 15:18:41 -0800 From: Marcus Reid To: freebsd-chat@FreeBSD.Org Subject: simplicity_saver Message-ID: <20011104151840.A13030@blazingdot.com> Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="FCuugMFkClbJLl1L" Content-Disposition: inline User-Agent: Mutt/1.2.5i Coffee-Level: high Sender: owner-freebsd-chat@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.org --FCuugMFkClbJLl1L Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Hi: I thought I'd share this screensaver module that I wrote. I find it interesting what the effect is achieved with only a few lines of code, yet it looks very complicated. -- Marcus Reid Blazingdot "They that can give up essential liberty to obtain a little temporary safety deserve neither liberty nor safety." -- Benjamin Franklin, 1759 --FCuugMFkClbJLl1L Content-Type: text/plain; charset=us-ascii Content-Disposition: attachment; filename=Makefile KMOD= simplicity_saver SRCS= simplicity_saver.c CWARNFLAGS= -Wall -pedantic .include --FCuugMFkClbJLl1L Content-Type: text/plain; charset=us-ascii Content-Disposition: attachment; filename="simplicity_saver.c" /*- * Copyright (c) 2001 Marcus L. Reid * 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, * without modification, immediately at the beginning of the file. * 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 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. * */ /* * 20011103 Marcus L. Reid * * written with much help from fire_saver.c * */ #include #include #include #include #include #include #include #include #include #include #define X_SIZE 320 #define Y_SIZE 200 static int blanked; static u_char k_pal[768]; static u_char buf[X_SIZE * (Y_SIZE + 1)]; static u_char *vid; static int z, cv; static int simplicity_saver(video_adapter_t *adp, int blank) { int x, y; if (blank) { if (blanked <= 0) { int red, green, blue; int palette_index; set_video_mode(adp, M_VGA_CG320); /* build and load palette */ red = green = blue = 0; for (palette_index = 0; palette_index < 256; palette_index++) { if(palette_index < 64) { k_pal[(palette_index * 3) + 0] = palette_index * 4; k_pal[(palette_index * 3) + 1] = 0; k_pal[(palette_index * 3) + 2] = 0; } else if(palette_index < 128) { k_pal[(palette_index * 3) + 0] = 0; k_pal[(palette_index * 3) + 1] = (palette_index - 64) * 4; k_pal[(palette_index * 3) + 2] = 0; } else if(palette_index < 192) { k_pal[(palette_index * 3) + 0] = 0; k_pal[(palette_index * 3) + 1] = 0; k_pal[(palette_index * 3) + 2] = (palette_index - 128) * 4; } else if(palette_index < 256) { k_pal[(palette_index * 3) + 0] = (palette_index - 192) * 4; k_pal[(palette_index * 3) + 1] = (palette_index - 192) * 4; k_pal[(palette_index * 3) + 2] = (palette_index - 192) * 4; } } load_palette(adp, k_pal); blanked++; vid = (u_char *) adp->va_window; } /* Now that we have the colors, time for simple magic. */ for (y = 0; y < Y_SIZE; cv += y++) { for (x = 0; x < X_SIZE; cv += x++) { buf[y*X_SIZE+x] = cv % 256; } } cv += z++; /* Done. */ /* blit our buffer into video ram */ memcpy(vid, buf, X_SIZE * Y_SIZE); } else { blanked = 0; } return 0; } static int simplicity_initialise(video_adapter_t *adp) { video_info_t info; /* check that the console is capable of running in 320x200x256 */ if (get_mode_info(adp, M_VGA_CG320, &info)) { log(LOG_NOTICE, "simplicity_saver: the console does not support M_VGA_CG320\n"); return (ENODEV); } blanked = 0; z = 0; return 0; } static int simplicity_terminate(video_adapter_t *adp) { return 0; } static scrn_saver_t simplicity_module = { "simplicity_saver", simplicity_initialise, simplicity_terminate, simplicity_saver, NULL }; SAVER_MODULE(simplicity_saver, simplicity_module); --FCuugMFkClbJLl1L-- To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-chat" in the body of the message