224 lines
6.3 KiB
C
224 lines
6.3 KiB
C
/*
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* Copyright (c) 2002-2004, Adam Dunkels.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials provided
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* with the distribution.
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* 3. The name of the author may not be used to endorse or promote
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* products derived from this software without specific prior
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* written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
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* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
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* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* This file is part of the Contiki desktop environment
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*
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* $Id: plasma.c,v 1.1 2007/05/23 23:11:24 oliverschmidt Exp $
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*
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*/
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#include <stdlib.h>
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#include "ctk/ctk.h"
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#include "ctk/ctk-draw.h"
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#include "ctk/ctk-mouse.h"
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#include "contiki.h"
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static unsigned char sinetab1[256] = {
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128, 131, 134, 137, 140, 143, 146, 149,
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152, 156, 159, 162, 165, 168, 171, 174,
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176, 179, 182, 185, 188, 191, 193, 196,
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199, 201, 204, 206, 209, 211, 213, 216,
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218, 220, 222, 224, 226, 228, 230, 232,
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234, 236, 237, 239, 240, 242, 243, 245,
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246, 247, 248, 249, 250, 251, 252, 252,
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253, 254, 254, 255, 255, 255, 255, 255,
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255, 255, 255, 255, 255, 255, 254, 254,
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253, 252, 252, 251, 250, 249, 248, 247,
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246, 245, 243, 242, 240, 239, 237, 236,
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234, 232, 230, 228, 226, 224, 222, 220,
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218, 216, 213, 211, 209, 206, 204, 201,
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199, 196, 193, 191, 188, 185, 182, 179,
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176, 174, 171, 168, 165, 162, 159, 156,
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152, 149, 146, 143, 140, 137, 134, 131,
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128, 124, 121, 118, 115, 112, 109, 106,
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103, 99, 96, 93, 90, 87, 84, 81,
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79, 76, 73, 70, 67, 64, 62, 59,
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56, 54, 51, 49, 46, 44, 42, 39,
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37, 35, 33, 31, 29, 27, 25, 23,
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21, 19, 18, 16, 15, 13, 12, 10,
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9, 8, 7, 6, 5, 4, 3, 3,
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2, 1, 1, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 1, 1,
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2, 3, 3, 4, 5, 6, 7, 8,
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9, 10, 12, 13, 15, 16, 18, 19,
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21, 23, 25, 27, 29, 31, 33, 35,
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37, 39, 42, 44, 46, 49, 51, 54,
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56, 59, 62, 64, 67, 70, 73, 76,
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78, 81, 84, 87, 90, 93, 96, 99,
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103, 106, 109, 112, 115, 118, 121, 124,
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};
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static unsigned char sinetab2[256];
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static unsigned char sinetab3[256];
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static unsigned char colortab[256];
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static unsigned char colors[16] =
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{
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0x00, 0x06, 0x0b, 0x04,
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0x0a, 0x0f, 0x07, 0x01,
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0x07, 0x0f, 0x0a, 0x08,
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0x02, 0x09, 0x00, 0x00,
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};
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#define XSIZE 25
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#define YSIZE 25
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#define XADD01 0xfe
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#define YADD01 0x05
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#define XADD1 0x04
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#define YADD1 0x02
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#define XADD2 0xfc
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#define YADD2 0xf9
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#define XADD 0x03
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#define YADD 0xfe
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#define MOVADD 0xfb
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static unsigned char xplasma[XSIZE], yplasma[YSIZE];
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static unsigned char xcnt, ycnt;
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static unsigned char xcnt01, xcnt02, xcnt1, xcnt2;
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static unsigned char ycnt01, ycnt02, ycnt1, ycnt2;
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static unsigned char xadd02 = 0x01;
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static unsigned char yadd02 = 0xfb;
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static unsigned char movcnt;
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PROCESS(plasma_process, "Plasma screensaver");
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/*---------------------------------------------------------------------------*/
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static void
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scrninit(void)
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{
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unsigned char *ptr, *cptr;
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static int i;
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/* Make sine tables */
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for(i = 0; i < 256; ++i) {
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sinetab2[(unsigned char)i] = sinetab1[(unsigned char)i] / 2;
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sinetab3[(unsigned char)i] = sinetab1[(unsigned char)i] / 4;
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}
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/* Make color table */
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for(i = 0; i < 256; ++i) {
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colortab[(unsigned char)i] = colors[(unsigned char)i / 16];
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}
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/* Fill screen with inverted spaces. */
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cptr = COLOR_RAM;
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for(ptr = (unsigned char *)0x0400;
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ptr != (unsigned char *)0x07e8;
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++ptr) {
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*ptr = 0xa0;
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*cptr++ = 0x00;
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}
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VIC.ctrl1 = 0x1b; /* $D011 */
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VIC.addr = 0x17; /* $D018 */
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VIC.ctrl2 = 0xc8; /* $D016 */
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VIC.bordercolor = 0x00; /* $D020 */
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VIC.bgcolor0 = 0x00; /* $D021 */
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CIA2.pra = 0x03; /* $DD00 */
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}
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/*---------------------------------------------------------------------------*/
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static void
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pollhandler(void)
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{
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static unsigned char i, x, y;
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register unsigned char *cptr;
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if(ctk_mode_get() == CTK_MODE_SCREENSAVER) {
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xcnt1 = xcnt01;
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xcnt2 = xcnt02;
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for(i = 0; i < XSIZE; ++i) {
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xplasma[i] = sinetab1[xcnt1] + sinetab2[xcnt2];
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xcnt1 += XADD1;
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xcnt2 += XADD2;
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}
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ycnt1 = ycnt01;
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ycnt2 = ycnt02;
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for(i = 0; i < YSIZE; ++i) {
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yplasma[i] = sinetab1[ycnt1] + sinetab3[ycnt2];
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ycnt1 += YADD1;
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ycnt2 += YADD2;
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}
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xcnt01 += XADD01;
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xcnt02 += xadd02;
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ycnt01 += YADD01;
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ycnt02 += yadd02;
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yadd02 = sinetab3[ycnt] / 4;
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xadd02 = sinetab3[xcnt] / 4;
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ycnt += YADD;
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xcnt += XADD;
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movcnt += MOVADD;
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cptr = (unsigned char *)(COLOR_RAM + sinetab1[movcnt]/16);
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for(y = 0; y < YSIZE; ++y) {
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for(x = 0; x < XSIZE; ++x) {
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*cptr = colortab[(xplasma[x] + yplasma[y]) & 0xff];
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++cptr;
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}
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cptr += 40 - XSIZE;
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}
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}
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}
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/*---------------------------------------------------------------------------*/
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PROCESS_THREAD(plasma_process, ev, data)
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{
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PROCESS_POLLHANDLER(pollhandler());
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PROCESS_BEGIN();
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ctk_mode_set(CTK_MODE_SCREENSAVER);
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ctk_mouse_hide();
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scrninit();
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PROCESS_WAIT_EVENT_UNTIL(ev == ctk_signal_screensaver_stop ||
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ev == PROCESS_EVENT_EXIT);
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ctk_draw_init();
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ctk_desktop_redraw(NULL);
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PROCESS_END();
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}
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/*---------------------------------------------------------------------------*/
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