apps/plugins/matrix.c

   1 /***************************************************************************
   2  *             __________               __   ___.
   3  *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
   4  *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
   5  *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
   6  *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
   7  *                     \/            \/     \/    \/            \/
   8  * $Id$
   9  *
  10  * Copyright (C) 1999 Chris Allegretta
  11  * Copyright (C) 2005 Alastair S - ported to podzilla
  12  * Copyright (C) 2005 Jonas Häggqvist - ported to rockbox
  13  *
  14  *
  15  * This program is free software; you can redistribute it and/or
  16  * modify it under the terms of the GNU General Public License
  17  * as published by the Free Software Foundation; either version 2
  18  * of the License, or (at your option) any later version.
  19  *
  20  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
  21  * KIND, either express or implied.
  22  *
  23  ****************************************************************************/
  24
  25 /*
  26  * TODO:
  27  *  - The font is a bit large, create smaller one
  28  *  - For colour/greyscale displays, the font from the xscreensaver xmatrix
  29  *    should be converted and used
  30  * BUGS:
  31  *  - The animation "dies" after a few seconds, not sure why. Works in sim.
  32  *  Symtom Fixed Oct 2007 GRaTT (Gerritt Gonzales)
  33  */
  34
  35
  36 #include "plugin.h"
  37 PLUGIN_HEADER
  38
  39 /* Images */
  40 #define MAXCHARS 27 - 1
  41 extern const fb_data matrix_bold[];
  42 extern const fb_data matrix_normal[];
  43 #define COL_W 14
  44 #define COL_H 15
  45
  46 #define COLS LCD_WIDTH/COL_W
  47 #define ROWS LCD_HEIGHT/COL_H
  48
  49 #define LEFTMARGIN (LCD_WIDTH-(COLS*COL_W))/2
  50 #define TOPMARGIN  (LCD_HEIGHT-(ROWS*COL_H))/2
  51
  52 #if (CONFIG_KEYPAD == IPOD_4G_PAD) || \
  53       (CONFIG_KEYPAD == IPOD_3G_PAD) || \
  54       (CONFIG_KEYPAD == IPOD_1G2G_PAD)
  55 #define MATRIX_EXIT BUTTON_MENU
  56 #define MATRIX_SLEEP_MORE BUTTON_SCROLL_BACK|BUTTON_REPEAT
  57 #define MATRIX_SLEEP_LESS BUTTON_SCROLL_FWD|BUTTON_REPEAT
  58 #define MATRIX_PAUSE BUTTON_PLAY
  59 #elif (CONFIG_KEYPAD == IRIVER_H100_PAD) || \
  60       (CONFIG_KEYPAD == IRIVER_H300_PAD)
  61 #define MATRIX_EXIT BUTTON_OFF
  62 #define MATRIX_SLEEP_MORE BUTTON_UP
  63 #define MATRIX_SLEEP_LESS BUTTON_DOWN
  64 #define MATRIX_PAUSE BUTTON_SELECT
  65 #elif (CONFIG_KEYPAD == IRIVER_H10_PAD)
  66 #define MATRIX_EXIT BUTTON_POWER
  67 #define MATRIX_SLEEP_MORE BUTTON_SCROLL_UP|BUTTON_REPEAT
  68 #define MATRIX_SLEEP_LESS BUTTON_SCROLL_DOWN|BUTTON_REPEAT
  69 #define MATRIX_PAUSE BUTTON_PLAY
  70 #elif (CONFIG_KEYPAD == IAUDIO_X5M5_PAD)
  71 #define MATRIX_EXIT BUTTON_POWER
  72 #define MATRIX_SLEEP_MORE BUTTON_UP
  73 #define MATRIX_SLEEP_LESS BUTTON_DOWN
  74 #define MATRIX_PAUSE BUTTON_PLAY
  75 #elif (CONFIG_KEYPAD == GIGABEAT_PAD)
  76 #define MATRIX_EXIT BUTTON_POWER
  77 #define MATRIX_SLEEP_MORE BUTTON_UP
  78 #define MATRIX_SLEEP_LESS BUTTON_DOWN
  79 #define MATRIX_PAUSE BUTTON_SELECT
  80 #elif CONFIG_KEYPAD == SANSA_E200_PAD
  81 #define MATRIX_EXIT BUTTON_POWER
  82 #define MATRIX_SLEEP_MORE BUTTON_SCROLL_BACK|BUTTON_REPEAT
  83 #define MATRIX_SLEEP_LESS BUTTON_SCROLL_FWD|BUTTON_REPEAT
  84 #define MATRIX_PAUSE BUTTON_SELECT
  85 #elif CONFIG_KEYPAD == SANSA_C200_PAD
  86 #define MATRIX_EXIT BUTTON_POWER
  87 #define MATRIX_SLEEP_MORE BUTTON_UP
  88 #define MATRIX_SLEEP_LESS BUTTON_DOWN
  89 #define MATRIX_PAUSE BUTTON_SELECT
  90 #elif (CONFIG_KEYPAD == GIGABEAT_S_PAD)
  91 #define MATRIX_EXIT BUTTON_BACK
  92 #define MATRIX_SLEEP_MORE BUTTON_UP
  93 #define MATRIX_SLEEP_LESS BUTTON_DOWN
  94 #define MATRIX_PAUSE BUTTON_SELECT
  95 #elif CONFIG_KEYPAD == IAUDIO_M3_PAD
  96 #define MATRIX_EXIT BUTTON_RC_REC
  97 #define MATRIX_SLEEP_MORE BUTTON_RC_VOL_UP
  98 #define MATRIX_SLEEP_LESS BUTTON_RC_VOL_DOWN
  99 #define MATRIX_PAUSE BUTTON_RC_PLAY
 100 #elif (CONFIG_KEYPAD == COWOND2_PAD)
 101 #define MATRIX_EXIT BUTTON_POWER
 102 #elif CONFIG_KEYPAD == IAUDIO67_PAD
 103 #define MATRIX_EXIT BUTTON_POWER
 104 #define MATRIX_SLEEP_MORE BUTTON_VOLUP
 105 #define MATRIX_SLEEP_LESS BUTTON_VOLDOWN
 106 #define MATRIX_PAUSE BUTTON_PLAY
 107 #else
 108 #error Unsupported keypad
 109 #endif
 110
 111 #ifdef HAVE_TOUCHSCREEN
 112 #ifndef MATRIX_EXIT
 113 #define MATRIX_EXIT       BUTTON_TOPLEFT
 114 #endif
 115 #ifndef MATRIX_SLEEP_MORE
 116 #define MATRIX_SLEEP_MORE BUTTON_MIDRIGHT
 117 #endif
 118 #ifndef MATRIX_SLEEP_LESS
 119 #define MATRIX_SLEEP_LESS BUTTON_MIDLEFT
 120 #endif
 121 #ifndef MATRIX_PAUSE
 122 #define MATRIX_PAUSE      BUTTON_CENTER
 123 #endif
 124 #endif
 125
 126 #define SLEEP HZ/50
 127
 128 /* Codec api pointer */
 129 static const struct plugin_api* rb;
 130
 131 /* Each position is of this type */
 132 typedef struct cmatrix {
 133     int val;
 134     int bold;
 135 } cmatrix;
 136
 137 /* The matrix - who'd have guessed it was just a few hundred bytes? */
 138 static cmatrix matrix[ROWS][COLS];
 139 static int length[COLS];
 140 static int spaces[COLS];
 141 static int updates[COLS];
 142
 143 static void matrix_init(void) {
 144     int i,j;
 145
 146     /* Seed rand */
 147     rb->srand(*rb->current_tick);
 148
 149     /* Make the matrix */
 150     for (i = 0; i <= ROWS; i++) {
 151         for (j = 0; j <= COLS - 1; j++ ) {
 152             matrix[i][j].val = -1;
 153             matrix[i][j].bold = 0;
 154         }
 155     }
 156
 157     for (j = 0; j <= COLS - 1; j++) {
 158         /* Set up spaces[] array of how many spaces to skip */
 159         spaces[j] = rb->rand() % ROWS + 1;
 160
 161         /* And length of the stream */
 162         length[j] = rb->rand() % (ROWS - 3) + 3;
 163
 164         /* Sentinel value for creation of new objects */
 165         matrix[1][j].val = 129;
 166
 167         /* And set updates[] array for update speed. */
 168         updates[j] = rb->rand() % 3 + 1;
 169     }
 170 }
 171
 172 static void matrix_blit_char(const int row, const int col, int cha)
 173 {
 174     if (cha == 129 || cha == 2 || cha > MAXCHARS)
 175         cha = 0;
 176
 177     if (matrix[row][col].bold == 1) {
 178         rb->lcd_bitmap_part(matrix_bold, cha*COL_W, 0, 392,
 179                 col*COL_W + LEFTMARGIN, row*COL_H + TOPMARGIN, COL_W, COL_H);
 180     }
 181     else {
 182         rb->lcd_bitmap_part(matrix_normal, cha*COL_W, 0, 392,
 183                 col*COL_W + LEFTMARGIN, row*COL_H + TOPMARGIN, COL_W, COL_H);
 184     }
 185 }
 186
 187 static void matrix_loop(void)
 188 {
 189     int i, j = 0, y, z, firstcoldone = 0;
 190     static int count = 0;
 191     int randomness = 6;
 192
 193     count++;
 194     if (count > 4)
 195         count = 1;
 196
 197     for (j = 0; j <= COLS - 1; j++) {
 198         if (count > updates[j]) {
 199             /* New style scrolling */
 200             if (matrix[0][j].val == -1 && matrix[1][j].val == 129
 201                     && spaces[j] > 0) {
 202                 matrix[0][j].val = -1;
 203                 spaces[j]--;
 204             } else if (matrix[0][j].val == -1 && matrix[1][j].val == 129){
 205                 length[j] = rb->rand() % (ROWS - 3) + 3;
 206                 matrix[0][j].val = rb->rand() % (MAXCHARS-1) + 1;
 207                 if (rb->rand() % 2 == 1)
 208                     matrix[0][j].bold = 2;
 209                 spaces[j] = rb->rand() % ROWS + 1;
 210             }
 211             i = 0;
 212             y = 0;
 213             firstcoldone = 0;
 214             while (i <= ROWS) {
 215                 /* Skip over spaces */
 216                 /* this is whear the characters were disappearing */
 217 /*
 218                 while (i <= ROWS && (matrix[i][j].val == 129 ||
 219                             matrix[i][j].val == -1))
 220                     i++;
 221 */
 222         /* A little more random now for spaces */
 223                if (rb->rand() % randomness == 1){
 224                    while (i <= ROWS && (matrix[i][j].val == 129 ||
 225                             matrix[i][j].val == -1)){
 226                     i++;
 227                     randomness--;
 228                     if(randomness <=1)
 229                         randomness = 6;}
 230                 }else{
 231                     randomness++;
 232                     if(randomness >6)
 233                     randomness = 6;
 234                 }
 235
 236
 237                 if (i > ROWS)
 238                     break;
 239
 240                 /* Go to the head of this collumn */
 241                 z = i;
 242                 y = 0;
 243                 while (i <= ROWS && (matrix[i][j].val != 129 &&
 244                             matrix[i][j].val != -1)) {
 245                     i++;
 246                     y++;
 247                 }
 248
 249                 if (i > ROWS) {
 250                     matrix[z][j].val = 129;
 251                     matrix[ROWS][j].bold = 1;
 252                     matrix_blit_char(z - 1, j, matrix[z][j].val);
 253                     continue;
 254                 }
 255
 256                 matrix[i][j].val = rb->rand() % (MAXCHARS-1) + 1;
 257
 258                 if (matrix[i - 1][j].bold == 2) {
 259                     matrix[i - 1][j].bold = 1;
 260                     matrix[i][j].bold = 2;
 261                 }
 262
 263                 /* If we're at the top of the collumn and it's reached its
 264                  * full length (about to start moving down), we do this
 265                  * to get it moving. This is also how we keep segments
 266                  * not already growing from growing accidentally =>
 267                  */
 268                 if (y > length[j] || firstcoldone) {
 269                     matrix[z][j].val = 129;
 270                     matrix[0][j].val = -1;
 271                 }
 272                 firstcoldone = 1;
 273                 i++;
 274             }
 275             for (i = 1; i <= ROWS; i++) {
 276                 if (matrix[i][j].val == 0 || matrix[i][j].bold == 2) {
 277                     if (matrix[i][j].val == 0)
 278                         matrix_blit_char(i - 1, j, 20);
 279                     else
 280                         matrix_blit_char(i - 1, j, matrix[i][j].val);
 281                 } else {
 282                     if (matrix[i][j].val == 1)
 283                         matrix_blit_char(i - 1, j, 2);
 284                     else if (matrix[i][j].val == -1)
 285                         matrix_blit_char(i - 1, j, 129);
 286                     else
 287                         matrix_blit_char(i - 1, j, matrix[i][j].val);
 288                 }
 289             }
 290         }
 291     }
 292 }
 293
 294 enum plugin_status plugin_start(const struct plugin_api* api, const void* parameter) {
 295     int button;
 296     int sleep = SLEEP;
 297     bool frozen = false;
 298
 299     (void)parameter;
 300     rb = api;
 301
 302     rb->lcd_set_background(LCD_BLACK);
 303     rb->lcd_set_backdrop(NULL);
 304     rb->lcd_clear_display();
 305     matrix_init();
 306
 307     while (1) {
 308         if (!frozen) {
 309             matrix_loop();
 310             rb->lcd_update();
 311             rb->sleep(sleep);
 312         }
 313         button = rb->button_get(false);
 314         switch(button) {
 315             case MATRIX_PAUSE:
 316                 frozen = !frozen;
 317                 break;
 318             case MATRIX_EXIT:
 319                 return PLUGIN_OK;
 320                 break;
 321             case MATRIX_SLEEP_MORE:
 322                 /* Sleep longer */
 323                 sleep += SLEEP;
 324                 break;
 325             case MATRIX_SLEEP_LESS:
 326                 /* Sleep less */
 327                 sleep -= SLEEP;
 328                 if (sleep < 0) sleep = 0;
 329                 break;
 330             default:
 331                 if (rb->default_event_handler(button) == SYS_USB_CONNECTED) {
 332                     return PLUGIN_USB_CONNECTED;
 333                 }
 334                 break;
 335         }
 336     }
 337     return PLUGIN_OK;
 338 }