apps/plugins/snow.c

   1 /***************************************************************************
   2  *             __________               __   ___.
   3  *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
   4  *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
   5  *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
   6  *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
   7  *                     \/            \/     \/    \/            \/
   8  * $Id$
   9  *
  10  * Copyright (C) 2002 Itai Shaked
  11  *
  12  * All files in this archive are subject to the GNU General Public License.
  13  * See the file COPYING in the source tree root for full license agreement.
  14  *
  15  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
  16  * KIND, either express or implied.
  17  *
  18  **************************************************************************/
  19 #include "plugin.h"
  20
  21 #ifdef HAVE_LCD_BITMAP
  22
  23 #define NUM_PARTICLES 100
  24
  25 static short particles[NUM_PARTICLES][2];
  26 static struct plugin_api* rb;
  27
  28 static bool particle_exists(int particle)
  29 {
  30     if (particles[particle][0]>=0 && particles[particle][1]>=0 &&
  31         particles[particle][0]<112 && particles[particle][1]<64)
  32         return true;
  33     else
  34         return false;
  35 }
  36
  37 static int create_particle(void)
  38 {
  39     int i;
  40
  41     for (i=0; i<NUM_PARTICLES; i++) {
  42         if (!particle_exists(i)) {
  43             particles[i][0]=(rb->rand()%112);
  44             particles[i][1]=0;
  45             return i;
  46         }
  47     }
  48     return -1;
  49 }
  50
  51 static void snow_move(void)
  52 {
  53     int i;
  54
  55     if (!(rb->rand()%2))
  56         create_particle();
  57
  58     for (i=0; i<NUM_PARTICLES; i++) {
  59         if (particle_exists(i)) {
  60             rb->lcd_clearpixel(particles[i][0],particles[i][1]);
  61             switch ((rb->rand()%7)) {
  62                 case 0:
  63                     particles[i][0]++;
  64                     break;
  65
  66                 case 1:
  67                     particles[i][0]--;
  68                     break;
  69
  70                 case 2:
  71                     break;
  72
  73                 default:
  74                     particles[i][1]++;
  75                     break;
  76             }
  77             if (particle_exists(i))
  78                 rb->lcd_drawpixel(particles[i][0],particles[i][1]);
  79         }
  80     }
  81 }
  82
  83 static void snow_init(void)
  84 {
  85     int i;
  86
  87     for (i=0; i<NUM_PARTICLES; i++) {
  88         particles[i][0]=-1;
  89         particles[i][1]=-1;
  90     }
  91     rb->lcd_clear_display();
  92 }
  93
  94 enum plugin_status plugin_start(struct plugin_api* api, void* parameter)
  95 {
  96     int button;
  97     TEST_PLUGIN_API(api);
  98     (void)(parameter);
  99     rb = api;
 100
 101     snow_init();
 102     while (1) {
 103         snow_move();
 104         rb->lcd_update();
 105         rb->sleep(HZ/20);
 106
 107         button = rb->button_get(false);
 108
 109         if (button == BUTTON_OFF)
 110             return PLUGIN_OK;
 111         else
 112             if (rb->default_event_handler(button) == SYS_USB_CONNECTED)
 113                 return PLUGIN_USB_CONNECTED;
 114     }
 115 }
 116
 117 #endif