/* * Copyright (c) 2002-2004, Adam Dunkels. * 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. * 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. * * This file is part of the Contiki desktop environment * * $Id: plasma.c,v 1.1 2007/05/23 23:11:24 oliverschmidt Exp $ * */ #include #include "ctk/ctk.h" #include "ctk/ctk-draw.h" #include "ctk/ctk-mouse.h" #include "contiki.h" static unsigned char sinetab1[256] = { 128, 131, 134, 137, 140, 143, 146, 149, 152, 156, 159, 162, 165, 168, 171, 174, 176, 179, 182, 185, 188, 191, 193, 196, 199, 201, 204, 206, 209, 211, 213, 216, 218, 220, 222, 224, 226, 228, 230, 232, 234, 236, 237, 239, 240, 242, 243, 245, 246, 247, 248, 249, 250, 251, 252, 252, 253, 254, 254, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 254, 254, 253, 252, 252, 251, 250, 249, 248, 247, 246, 245, 243, 242, 240, 239, 237, 236, 234, 232, 230, 228, 226, 224, 222, 220, 218, 216, 213, 211, 209, 206, 204, 201, 199, 196, 193, 191, 188, 185, 182, 179, 176, 174, 171, 168, 165, 162, 159, 156, 152, 149, 146, 143, 140, 137, 134, 131, 128, 124, 121, 118, 115, 112, 109, 106, 103, 99, 96, 93, 90, 87, 84, 81, 79, 76, 73, 70, 67, 64, 62, 59, 56, 54, 51, 49, 46, 44, 42, 39, 37, 35, 33, 31, 29, 27, 25, 23, 21, 19, 18, 16, 15, 13, 12, 10, 9, 8, 7, 6, 5, 4, 3, 3, 2, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 2, 3, 3, 4, 5, 6, 7, 8, 9, 10, 12, 13, 15, 16, 18, 19, 21, 23, 25, 27, 29, 31, 33, 35, 37, 39, 42, 44, 46, 49, 51, 54, 56, 59, 62, 64, 67, 70, 73, 76, 78, 81, 84, 87, 90, 93, 96, 99, 103, 106, 109, 112, 115, 118, 121, 124, }; static unsigned char sinetab2[256]; static unsigned char sinetab3[256]; static unsigned char colortab[256]; static unsigned char colors[16] = { 0x00, 0x06, 0x0b, 0x04, 0x0a, 0x0f, 0x07, 0x01, 0x07, 0x0f, 0x0a, 0x08, 0x02, 0x09, 0x00, 0x00, }; #define XSIZE 25 #define YSIZE 25 #define XADD01 0xfe #define YADD01 0x05 #define XADD1 0x04 #define YADD1 0x02 #define XADD2 0xfc #define YADD2 0xf9 #define XADD 0x03 #define YADD 0xfe #define MOVADD 0xfb static unsigned char xplasma[XSIZE], yplasma[YSIZE]; static unsigned char xcnt, ycnt; static unsigned char xcnt01, xcnt02, xcnt1, xcnt2; static unsigned char ycnt01, ycnt02, ycnt1, ycnt2; static unsigned char xadd02 = 0x01; static unsigned char yadd02 = 0xfb; static unsigned char movcnt; PROCESS(plasma_process, "Plasma screensaver"); /*---------------------------------------------------------------------------*/ static void scrninit(void) { unsigned char *ptr, *cptr; static int i; /* Make sine tables */ for(i = 0; i < 256; ++i) { sinetab2[(unsigned char)i] = sinetab1[(unsigned char)i] / 2; sinetab3[(unsigned char)i] = sinetab1[(unsigned char)i] / 4; } /* Make color table */ for(i = 0; i < 256; ++i) { colortab[(unsigned char)i] = colors[(unsigned char)i / 16]; } /* Fill screen with inverted spaces. */ cptr = COLOR_RAM; for(ptr = (unsigned char *)0x0400; ptr != (unsigned char *)0x07e8; ++ptr) { *ptr = 0xa0; *cptr++ = 0x00; } VIC.ctrl1 = 0x1b; /* $D011 */ VIC.addr = 0x17; /* $D018 */ VIC.ctrl2 = 0xc8; /* $D016 */ VIC.bordercolor = 0x00; /* $D020 */ VIC.bgcolor0 = 0x00; /* $D021 */ CIA2.pra = 0x03; /* $DD00 */ } /*---------------------------------------------------------------------------*/ static void pollhandler(void) { static unsigned char i, x, y; register unsigned char *cptr; if(ctk_mode_get() == CTK_MODE_SCREENSAVER) { xcnt1 = xcnt01; xcnt2 = xcnt02; for(i = 0; i < XSIZE; ++i) { xplasma[i] = sinetab1[xcnt1] + sinetab2[xcnt2]; xcnt1 += XADD1; xcnt2 += XADD2; } ycnt1 = ycnt01; ycnt2 = ycnt02; for(i = 0; i < YSIZE; ++i) { yplasma[i] = sinetab1[ycnt1] + sinetab3[ycnt2]; ycnt1 += YADD1; ycnt2 += YADD2; } xcnt01 += XADD01; xcnt02 += xadd02; ycnt01 += YADD01; ycnt02 += yadd02; yadd02 = sinetab3[ycnt] / 4; xadd02 = sinetab3[xcnt] / 4; ycnt += YADD; xcnt += XADD; movcnt += MOVADD; cptr = (unsigned char *)(COLOR_RAM + sinetab1[movcnt]/16); for(y = 0; y < YSIZE; ++y) { for(x = 0; x < XSIZE; ++x) { *cptr = colortab[(xplasma[x] + yplasma[y]) & 0xff]; ++cptr; } cptr += 40 - XSIZE; } } } /*---------------------------------------------------------------------------*/ PROCESS_THREAD(plasma_process, ev, data) { PROCESS_POLLHANDLER(pollhandler()); PROCESS_BEGIN(); ctk_mode_set(CTK_MODE_SCREENSAVER); ctk_mouse_hide(); scrninit(); PROCESS_WAIT_EVENT_UNTIL(ev == ctk_signal_screensaver_stop || ev == PROCESS_EVENT_EXIT); ctk_draw_init(); ctk_desktop_redraw(NULL); PROCESS_END(); } /*---------------------------------------------------------------------------*/