2acc0ac542
later. We still need to hunt down snippets used that are not. 1324 modified files... http://www.rockbox.org/mail/archive/rockbox-dev-archive-2008-06/0060.shtml git-svn-id: svn://svn.rockbox.org/rockbox/trunk@17847 a1c6a512-1295-4272-9138-f99709370657
496 lines
16 KiB
C
496 lines
16 KiB
C
/***************************************************************************
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* __________ __ ___.
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* Open \______ \ ____ ____ | | _\_ |__ _______ ___
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* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
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* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
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* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
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* \/ \/ \/ \/ \/
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* $Id$
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*
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* Copyright (C) 2007 Matthias Wientapper
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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****************************************************************************/
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/*
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* This is an implementatino of Conway's Game of Life
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*
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* from http://en.wikipedia.org/wiki/Conway's_Game_of_Life:
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*
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* Rules
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*
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* The universe of the Game of Life is an infinite two-dimensional
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* orthogonal grid of square cells, each of which is in one of two
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* possible states, live or dead. Every cell interacts with its eight
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* neighbours, which are the cells that are directly horizontally,
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* vertically, or diagonally adjacent. At each step in time, the
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* following transitions occur:
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*
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* 1. Any live cell with fewer than two live neighbours dies, as if by
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* loneliness.
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*
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* 2. Any live cell with more than three live neighbours dies, as if
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* by overcrowding.
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*
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* 3. Any live cell with two or three live neighbours lives,
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* unchanged, to the next generation.
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*
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* 4. Any dead cell with exactly three live neighbours comes to life.
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*
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* The initial pattern constitutes the first generation of the
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* system. The second generation is created by applying the above
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* rules simultaneously to every cell in the first generation --
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* births and deaths happen simultaneously, and the discrete moment at
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* which this happens is sometimes called a tick. (In other words,
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* each generation is based entirely on the one before.) The rules
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* continue to be applied repeatedly to create further generations.
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*
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*
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*
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* TODO:
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* - nicer colours for pixels with respect to age
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* - editor for start patterns
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* - probably tons of speed-up opportunities
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*/
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#include "plugin.h"
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#include "pluginlib_actions.h"
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#include "helper.h"
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PLUGIN_HEADER
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#define ROCKLIFE_PLAY_PAUSE PLA_FIRE
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#define ROCKLIFE_INIT PLA_DOWN
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#define ROCKLIFE_NEXT PLA_RIGHT
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#define ROCKLIFE_NEXT_REP PLA_RIGHT_REPEAT
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#define ROCKLIFE_QUIT PLA_QUIT
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#define ROCKLIFE_STATUS PLA_LEFT
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#define PATTERN_RANDOM 0
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#define PATTERN_GROWTH_1 1
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#define PATTERN_GROWTH_2 2
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#define PATTERN_ACORN 3
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#define PATTERN_GLIDER_GUN 4 /* not yet implemented */
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static const struct plugin_api* rb;
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const struct button_mapping *plugin_contexts[]
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= {generic_directions, generic_actions};
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unsigned char grid_a[LCD_WIDTH][LCD_HEIGHT];
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unsigned char grid_b[LCD_WIDTH][LCD_HEIGHT];
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int generation = 0;
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int population = 0;
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int status_line = 0;
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char buf[30];
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static inline void set_cell(int x, int y, char *pgrid){
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pgrid[x+y*LCD_WIDTH]=1;
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}
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/* clear grid */
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void init_grid(char *pgrid){
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int x, y;
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for(y=0; y<LCD_HEIGHT; y++){
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for(x=0; x<LCD_WIDTH; x++){
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pgrid[x+y*LCD_WIDTH] = 0;
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}
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}
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}
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/* fill grid with initial pattern */
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static void setup_grid(char *pgrid, int pattern){
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int n, max;
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int xmid, ymid;
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max = LCD_HEIGHT*LCD_WIDTH;
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switch(pattern){
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case PATTERN_RANDOM:
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rb->splash(HZ, "Random");
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#if 0 /* two oscilators, debug pattern */
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set_cell( 0, 1 , pgrid);
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set_cell( 1, 1 , pgrid);
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set_cell( 2, 1 , pgrid);
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set_cell( 6, 7 , pgrid);
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set_cell( 7, 7 , pgrid);
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set_cell( 8, 7 , pgrid);
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#endif
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/* fill screen randomly */
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for(n=0; n<(max>>2); n++)
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pgrid[rb->rand()%max] = 1;
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break;
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case PATTERN_GROWTH_1:
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rb->splash(HZ, "Growth");
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xmid = (LCD_WIDTH>>1) - 2;
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ymid = (LCD_HEIGHT>>1) - 2;
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set_cell(xmid + 6, ymid + 0 , pgrid);
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set_cell(xmid + 4, ymid + 1 , pgrid);
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set_cell(xmid + 6, ymid + 1 , pgrid);
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set_cell(xmid + 7, ymid + 1 , pgrid);
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set_cell(xmid + 4, ymid + 2 , pgrid);
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set_cell(xmid + 6, ymid + 2 , pgrid);
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set_cell(xmid + 4, ymid + 3 , pgrid);
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set_cell(xmid + 2, ymid + 4 , pgrid);
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set_cell(xmid + 0, ymid + 5 , pgrid);
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set_cell(xmid + 2, ymid + 5 , pgrid);
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break;
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case PATTERN_ACORN:
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rb->splash(HZ, "Acorn");
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xmid = (LCD_WIDTH>>1) - 3;
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ymid = (LCD_HEIGHT>>1) - 1;
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set_cell(xmid + 1, ymid + 0 , pgrid);
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set_cell(xmid + 3, ymid + 1 , pgrid);
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set_cell(xmid + 0, ymid + 2 , pgrid);
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set_cell(xmid + 1, ymid + 2 , pgrid);
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set_cell(xmid + 4, ymid + 2 , pgrid);
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set_cell(xmid + 5, ymid + 2 , pgrid);
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set_cell(xmid + 6, ymid + 2 , pgrid);
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break;
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case PATTERN_GROWTH_2:
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rb->splash(HZ, "Growth 2");
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xmid = (LCD_WIDTH>>1) - 4;
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ymid = (LCD_HEIGHT>>1) - 1;
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set_cell(xmid + 0, ymid + 0 , pgrid);
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set_cell(xmid + 1, ymid + 0 , pgrid);
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set_cell(xmid + 2, ymid + 0 , pgrid);
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set_cell(xmid + 4, ymid + 0 , pgrid);
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set_cell(xmid + 0, ymid + 1 , pgrid);
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set_cell(xmid + 3, ymid + 2 , pgrid);
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set_cell(xmid + 4, ymid + 2 , pgrid);
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set_cell(xmid + 1, ymid + 3 , pgrid);
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set_cell(xmid + 2, ymid + 3 , pgrid);
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set_cell(xmid + 4, ymid + 3 , pgrid);
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set_cell(xmid + 0, ymid + 4 , pgrid);
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set_cell(xmid + 2, ymid + 4 , pgrid);
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set_cell(xmid + 4, ymid + 4 , pgrid);
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break;
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case PATTERN_GLIDER_GUN:
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rb->splash(HZ, "Glider Gun");
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set_cell( 24, 0, pgrid);
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set_cell( 22, 1, pgrid);
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set_cell( 24, 1, pgrid);
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set_cell( 12, 2, pgrid);
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set_cell( 13, 2, pgrid);
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set_cell( 20, 2, pgrid);
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set_cell( 21, 2, pgrid);
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set_cell( 34, 2, pgrid);
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set_cell( 35, 2, pgrid);
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set_cell( 11, 3, pgrid);
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set_cell( 15, 3, pgrid);
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set_cell( 20, 3, pgrid);
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set_cell( 21, 3, pgrid);
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set_cell( 34, 3, pgrid);
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set_cell( 35, 3, pgrid);
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set_cell( 0, 4, pgrid);
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set_cell( 1, 4, pgrid);
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set_cell( 10, 4, pgrid);
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set_cell( 16, 4, pgrid);
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set_cell( 20, 4, pgrid);
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set_cell( 21, 4, pgrid);
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set_cell( 0, 5, pgrid);
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set_cell( 1, 5, pgrid);
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set_cell( 10, 5, pgrid);
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set_cell( 14, 5, pgrid);
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set_cell( 16, 5, pgrid);
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set_cell( 17, 5, pgrid);
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set_cell( 22, 5, pgrid);
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set_cell( 24, 5, pgrid);
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set_cell( 10, 6, pgrid);
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set_cell( 16, 6, pgrid);
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set_cell( 24, 6, pgrid);
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set_cell( 11, 7, pgrid);
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set_cell( 15, 7, pgrid);
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set_cell( 12, 8, pgrid);
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set_cell( 13, 8, pgrid);
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break;
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}
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}
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/* display grid */
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static void show_grid(char *pgrid){
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int x, y;
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int m;
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unsigned char age;
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rb->lcd_clear_display();
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for(y=0; y<LCD_HEIGHT; y++){
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for(x=0; x<LCD_WIDTH; x++){
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m = y*LCD_WIDTH+x;
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age = pgrid[m];
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if(age){
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#if LCD_DEPTH >= 16
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rb->lcd_set_foreground( LCD_RGBPACK( age, age, age ));
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#elif LCD_DEPTH == 2
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rb->lcd_set_foreground(age>>7);
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#endif
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rb->lcd_drawpixel(x, y);
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}
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}
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}
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if(status_line){
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rb->snprintf(buf, sizeof(buf), "g:%d p:%d", generation, population);
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#if LCD_DEPTH > 1
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rb->lcd_set_foreground( LCD_BLACK );
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#endif
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rb->lcd_puts(0, 0, buf);
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}
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rb->lcd_update();
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}
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/* check state of cell depending on the number of neighbours */
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static inline int check_cell(unsigned char *n){
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int sum;
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int empty_cells = 0;
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unsigned char live = 0;
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/* count empty neighbour cells */
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if(n[0]==0) empty_cells++;
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if(n[1]==0) empty_cells++;
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if(n[2]==0) empty_cells++;
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if(n[3]==0) empty_cells++;
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if(n[5]==0) empty_cells++;
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if(n[6]==0) empty_cells++;
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if(n[7]==0) empty_cells++;
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if(n[8]==0) empty_cells++;
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/* now we build the number of non-zero neighbours :-P */
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sum = 8 - empty_cells;
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/* 1st and 2nd rule*/
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if (n[4] && (sum<2 || sum>3))
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live = false;
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/* 3rd rule */
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if (n[4] && (sum==2 || sum==3))
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live = true;
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/* 4rd rule */
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if (!n[4] && sum==3)
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live = true;
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return live;
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}
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/* Calculate the next generation of cells
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*
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* The borders of the grid are connected to their opposite sides.
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*
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*
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* To avoid multiplications while accessing data in the 2-d grid
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* (pgrid) we try to re-use previously accessed neighbourhood
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* information which is stored in an 3x3 array.
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*
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*/
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static void next_generation(char *pgrid, char *pnext_grid){
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int x, y;
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unsigned char cell;
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int age;
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int m;
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unsigned char n[9];
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rb->memset(n, 0, sizeof(n));
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/*
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* cell is (4) with 8 neighbours
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*
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* 0|1|2
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* -----
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* 3|4|5
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* -----
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* 6|7|8
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*/
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population = 0;
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/* go through the grid */
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for(y=0; y<LCD_HEIGHT; y++){
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for(x=0; x<LCD_WIDTH; x++){
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if(y==0 && x==0){
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/* first cell in first row, we have to load all neighbours */
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n[0] = pgrid[((x+LCD_WIDTH-1)%LCD_WIDTH)+((y+LCD_HEIGHT-1)%LCD_HEIGHT)*LCD_WIDTH];
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n[1] = pgrid[((x )%LCD_WIDTH)+((y+LCD_HEIGHT-1)%LCD_HEIGHT)*LCD_WIDTH];
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n[2] = pgrid[((x +1)%LCD_WIDTH)+((y+LCD_HEIGHT-1)%LCD_HEIGHT)*LCD_WIDTH];
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n[3] = pgrid[((x+LCD_WIDTH-1)%LCD_WIDTH)+((y )%LCD_HEIGHT)*LCD_WIDTH];
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n[5] = pgrid[((x +1)%LCD_WIDTH)+((y )%LCD_HEIGHT)*LCD_WIDTH];
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n[6] = pgrid[((x+LCD_WIDTH-1)%LCD_WIDTH)+((y +1)%LCD_HEIGHT)*LCD_WIDTH];
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n[7] = pgrid[((x )%LCD_WIDTH)+((y +1)%LCD_HEIGHT)*LCD_WIDTH];
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n[8] = pgrid[((x +1)%LCD_WIDTH)+((y +1)%LCD_HEIGHT)*LCD_WIDTH];
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} else {
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if(x==0){
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/* beginning of a row, copy what we know about our predecessor,
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0, 1, 3 are known, 2, 5, 6, 7, 8 have to be loaded
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*/
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n[0] = n[4];
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n[1] = n[5];
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n[2] = pgrid[((x +1)%LCD_WIDTH)+((y+LCD_HEIGHT-1)%LCD_HEIGHT)*LCD_WIDTH];
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n[3] = n[7];
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n[5] = pgrid[((x +1)%LCD_WIDTH)+((y )%LCD_HEIGHT)*LCD_WIDTH];
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n[6] = pgrid[((x+LCD_WIDTH-1)%LCD_WIDTH)+((y +1)%LCD_HEIGHT)*LCD_WIDTH];
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n[7] = pgrid[((x )%LCD_WIDTH)+((y +1)%LCD_HEIGHT)*LCD_WIDTH];
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n[8] = pgrid[((x +1)%LCD_WIDTH)+((y +1)%LCD_HEIGHT)*LCD_WIDTH];
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} else {
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/* we are moving right in a row,
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* copy what we know about the neighbours on our left side,
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* 2, 5, 8 have to be loaded
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*/
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n[0] = n[1];
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n[1] = n[2];
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n[2] = pgrid[((x +1)%LCD_WIDTH)+((y+LCD_HEIGHT-1)%LCD_HEIGHT)*LCD_WIDTH];
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n[3] = n[4];
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n[5] = pgrid[((x +1)%LCD_WIDTH)+((y )%LCD_HEIGHT)*LCD_WIDTH];
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n[6] = n[7];
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n[7] = n[8];
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n[8] = pgrid[((x +1)%LCD_WIDTH)+((y +1)%LCD_HEIGHT)*LCD_WIDTH];
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}
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}
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m = x+y*LCD_WIDTH;
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/* how old is our cell? */
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n[4] = pgrid[m];
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age = n[4];
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/* calculate the cell based on given neighbour information */
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cell = check_cell(n);
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/* is the actual cell alive? */
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if(cell){
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population++;
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/* prevent overflow */
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if(age>252){
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pnext_grid[m] = 252;
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} else {
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pnext_grid[m] = age + 1;
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}
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}
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else
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pnext_grid[m] = 0;
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#if 0
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DEBUGF("x=%d,y=%d\n", x, y);
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DEBUGF("cell: %d\n", cell);
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DEBUGF("%d %d %d\n", n[0],n[1],n[2]);
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DEBUGF("%d %d %d\n", n[3],n[4],n[5]);
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DEBUGF("%d %d %d\n", n[6],n[7],n[8]);
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DEBUGF("----------------\n");
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#endif
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}
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}
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generation++;
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}
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/**********************************/
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/* this is the plugin entry point */
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/**********************************/
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enum plugin_status plugin_start(const struct plugin_api* api, const void* parameter)
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{
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int button = 0;
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int quit = 0;
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int stop = 0;
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int pattern = 0;
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char *pgrid;
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char *pnext_grid;
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char *ptemp;
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(void)parameter;
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rb = api;
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backlight_force_on(rb); /* backlight control in lib/helper.c */
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#if LCD_DEPTH > 1
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rb->lcd_set_backdrop(NULL);
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#ifdef HAVE_LCD_COLOR
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rb->lcd_set_background(LCD_RGBPACK(182, 198, 229)); /* rockbox blue */
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#else
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rb->lcd_set_background(LCD_DEFAULT_BG);
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#endif /* HAVE_LCD_COLOR */
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#endif /* LCD_DEPTH > 1 */
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/* link pointers to grids */
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pgrid = (char *)grid_a;
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pnext_grid = (char *)grid_b;
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init_grid(pgrid);
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setup_grid(pgrid, pattern++);
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show_grid(pgrid);
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while(!quit) {
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button = pluginlib_getaction(rb, TIMEOUT_BLOCK, plugin_contexts, 2);
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switch(button) {
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case ROCKLIFE_NEXT:
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case ROCKLIFE_NEXT_REP:
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/* calculate next generation */
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next_generation(pgrid, pnext_grid);
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/* swap buffers, grid is the new generation */
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ptemp = pgrid;
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pgrid = pnext_grid;
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pnext_grid = ptemp;
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/* show new generation */
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show_grid(pgrid);
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break;
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case ROCKLIFE_PLAY_PAUSE:
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stop = 0;
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while(!stop){
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/* calculate next generation */
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next_generation(pgrid, pnext_grid);
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/* swap buffers, grid is the new generation */
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ptemp = pgrid;
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pgrid = pnext_grid;
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pnext_grid = ptemp;
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/* show new generation */
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rb->yield();
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show_grid(pgrid);
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button = pluginlib_getaction(rb, 0, plugin_contexts, 2);
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switch(button) {
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case ROCKLIFE_PLAY_PAUSE:
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case ROCKLIFE_QUIT:
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stop = 1;
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break;
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default:
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break;
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}
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rb->yield();
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}
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break;
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case ROCKLIFE_INIT:
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init_grid(pgrid);
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setup_grid(pgrid, pattern);
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show_grid(pgrid);
|
|
pattern++;
|
|
pattern%=5;
|
|
break;
|
|
case ROCKLIFE_STATUS:
|
|
status_line = !status_line;
|
|
show_grid(pgrid);
|
|
break;
|
|
case ROCKLIFE_QUIT:
|
|
/* quit plugin */
|
|
quit=true;
|
|
return PLUGIN_OK;
|
|
break;
|
|
default:
|
|
if (rb->default_event_handler(button) == SYS_USB_CONNECTED) {
|
|
return PLUGIN_USB_CONNECTED;
|
|
}
|
|
break;
|
|
}
|
|
rb->yield();
|
|
}
|
|
|
|
backlight_use_settings(rb); /* backlight control in lib/helper.c */
|
|
return PLUGIN_OK;
|
|
}
|
|
|
|
|