apps/plugins/invadrox.c

   1 /***************************************************************************
   2  *             __________               __   ___.
   3  *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
   4  *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
   5  *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
   6  *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
   7  *                     \/            \/     \/    \/            \/
   8  * $Id$
   9  *
  10  * Copyright (C) 2006 Albert Veli
  11  *
  12  * This program is free software; you can redistribute it and/or
  13  * modify it under the terms of the GNU General Public License
  14  * as published by the Free Software Foundation; either version 2
  15  * of the License, or (at your option) any later version.
  16  *
  17  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
  18  * KIND, either express or implied.
  19  *
  20  ****************************************************************************/
  21
  22 /* Improvised creds goes to:
  23  *
  24  * - Anders Clausen for ingeniously inventing the name Invadrox.
  25  * - Linus Nielsen-Feltzing for patiently answering n00b questions.
  26  */
  27
  28 #include "plugin.h"
  29 #include "lib/highscore.h"
  30 #include "lib/helper.h"
  31
  32 PLUGIN_HEADER
  33
  34 /* Original graphics is only 1bpp so it should be portable
  35  * to most targets. But for now, only support the simple ones.
  36  */
  37 #ifndef HAVE_LCD_BITMAP
  38     #error INVADROX: Unsupported LCD
  39 #endif
  40
  41 #if (LCD_DEPTH < 2)
  42     #error INVADROX: Unsupported LCD
  43 #endif
  44
  45 /* #define DEBUG */
  46 #ifdef DEBUG
  47 #define DBG(format, arg...) { DEBUGF("%s: " format, __FUNCTION__, ## arg); }
  48 #else
  49 #define DBG(format, arg...) {}
  50 #endif
  51
  52 #if CONFIG_KEYPAD == IRIVER_H100_PAD
  53
  54 #define QUIT BUTTON_OFF
  55 #define LEFT BUTTON_LEFT
  56 #define RIGHT BUTTON_RIGHT
  57 #define FIRE BUTTON_ON
  58
  59 #elif CONFIG_KEYPAD == IRIVER_H300_PAD
  60
  61 #define QUIT BUTTON_OFF
  62 #define LEFT BUTTON_LEFT
  63 #define RIGHT BUTTON_RIGHT
  64 #define FIRE BUTTON_SELECT
  65
  66 #elif (CONFIG_KEYPAD == IRIVER_H10_PAD)
  67
  68 #define QUIT BUTTON_POWER
  69 #define LEFT BUTTON_LEFT
  70 #define RIGHT BUTTON_RIGHT
  71 #define FIRE BUTTON_PLAY
  72
  73 #elif (CONFIG_KEYPAD == IPOD_4G_PAD) || \
  74       (CONFIG_KEYPAD == IPOD_3G_PAD) || \
  75       (CONFIG_KEYPAD == IPOD_1G2G_PAD)
  76
  77 #define QUIT BUTTON_MENU
  78 #define LEFT BUTTON_LEFT
  79 #define RIGHT BUTTON_RIGHT
  80 #define FIRE BUTTON_SELECT
  81
  82 #elif CONFIG_KEYPAD == IAUDIO_X5M5_PAD
  83
  84 #define QUIT BUTTON_POWER
  85 #define LEFT BUTTON_LEFT
  86 #define RIGHT BUTTON_RIGHT
  87 #define FIRE BUTTON_SELECT
  88
  89 #elif CONFIG_KEYPAD == GIGABEAT_PAD
  90
  91 #define QUIT BUTTON_POWER
  92 #define LEFT BUTTON_LEFT
  93 #define RIGHT BUTTON_RIGHT
  94 #define FIRE BUTTON_SELECT
  95
  96 #elif CONFIG_KEYPAD == SANSA_E200_PAD || \
  97       CONFIG_KEYPAD == SANSA_FUZE_PAD
  98
  99 #define QUIT BUTTON_POWER
 100 #define LEFT BUTTON_LEFT
 101 #define RIGHT BUTTON_RIGHT
 102 #define FIRE BUTTON_SELECT
 103
 104 #elif CONFIG_KEYPAD == ELIO_TPJ1022_PAD
 105
 106 /* TODO: Figure out which buttons to use for Tatung Elio TPJ-1022 */
 107 #define QUIT BUTTON_AB
 108 #define LEFT BUTTON_LEFT
 109 #define RIGHT BUTTON_RIGHT
 110 #define FIRE BUTTON_MENU
 111
 112 #elif CONFIG_KEYPAD == GIGABEAT_S_PAD
 113
 114 #define QUIT BUTTON_BACK
 115 #define LEFT BUTTON_LEFT
 116 #define RIGHT BUTTON_RIGHT
 117 #define FIRE BUTTON_SELECT
 118
 119 #elif CONFIG_KEYPAD == COWOND2_PAD
 120
 121 #define QUIT BUTTON_POWER
 122
 123 #elif CONFIG_KEYPAD == IAUDIO67_PAD
 124
 125 #define QUIT BUTTON_POWER
 126 #define LEFT BUTTON_LEFT
 127 #define RIGHT BUTTON_RIGHT
 128 #define FIRE BUTTON_PLAY
 129
 130 #elif CONFIG_KEYPAD == CREATIVEZVM_PAD
 131
 132 #define QUIT BUTTON_BACK
 133 #define LEFT BUTTON_LEFT
 134 #define RIGHT BUTTON_RIGHT
 135 #define FIRE BUTTON_SELECT
 136
 137 #else
 138     #error INVADROX: Unsupported keypad
 139 #endif
 140
 141 #ifdef HAVE_TOUCHSCREEN
 142 #ifndef QUIT
 143 #define QUIT     BUTTON_TOPLEFT
 144 #endif
 145 #ifndef LEFT
 146 #define LEFT     BUTTON_MIDLEFT
 147 #endif
 148 #ifndef RIGHT
 149 #define RIGHT    BUTTON_MIDRIGHT
 150 #endif
 151 #ifndef FIRE
 152 #define FIRE     BUTTON_CENTER
 153 #endif
 154 #endif
 155
 156 #ifndef UNUSED
 157 #define UNUSED __attribute__ ((unused))
 158 #endif
 159
 160 #ifndef ABS
 161 #define ABS(x) (((x) < 0) ? (-(x)) : (x))
 162 #endif
 163
 164
 165 /* Defines common to all models */
 166 #define UFO_Y (SCORENUM_Y + FONT_HEIGHT + ALIEN_HEIGHT)
 167 #define PLAYFIELD_Y (LCD_HEIGHT - SHIP_HEIGHT - 2)
 168 #define PLAYFIELD_WIDTH (LCD_WIDTH - 2 * PLAYFIELD_X)
 169 #define LEVEL_X (LCD_WIDTH - PLAYFIELD_X - LIVES_X - LEVEL_WIDTH - 2 * NUMBERS_WIDTH - 3 * NUM_SPACING)
 170 #define SHIP_MIN_X (PLAYFIELD_X + PLAYFIELD_WIDTH / 5 - SHIELD_WIDTH / 2 - SHIP_WIDTH)
 171 #define SHIP_MAX_X (PLAYFIELD_X + 4 * PLAYFIELD_WIDTH / 5 + SHIELD_WIDTH / 2)
 172 /* SCORE_Y = 0 for most targets. Gigabeat redefines it later. */
 173 #define SCORE_Y 0
 174 #define MAX_LIVES 8
 175
 176
 177 /* iPod Video defines */
 178 #if (LCD_WIDTH == 320) && (LCD_HEIGHT == 240)
 179
 180 /* Original arcade game size 224x240, 1bpp with
 181  * red overlay at top and green overlay at bottom.
 182  *
 183  * iPod Video: 320x240x16
 184  * ======================
 185  * X: 48p padding at left/right gives 224p playfield in middle.
 186  *    10p "border" gives 204p actual playfield. UFO use full 224p.
 187  * Y: Use full 240p.
 188  *
 189  * MAX_X = (204 - 12) / 2 - 1 = 95
 190  *
 191  * Y: Score text 7       0
 192  *    Space      10      7
 193  *    Score      7       17
 194  *    Space      8       24
 195  * 3  Ufo        7       32
 196  * 2  Space      Aliens start at 32 + 3 * 8 = 56
 197  * 0  aliens     9*8     56  -
 198  *    space     ~7*8     128  | 18.75 aliens space between
 199  *    shield     2*8     182  | first alien and ship.
 200  *    space      8       198  | MAX_Y = 18
 201  *    ship       8       206 -
 202  *    space      2*8     214
 203  *    hline      1       230 - PLAYFIELD_Y
 204  *    bottom border 10   240
 205  *    Lives and Level goes inside bottom border
 206  */
 207
 208 #define ARCADISH_GRAPHICS
 209 #define PLAYFIELD_X 48
 210 #define SHIP_Y (PLAYFIELD_Y - 3 * SHIP_HEIGHT)
 211 #define ALIEN_START_Y (UFO_Y + 3 * ALIEN_HEIGHT)
 212 #define SCORENUM_X (PLAYFIELD_X + NUMBERS_WIDTH)
 213 #define SCORENUM_Y SCORE_Y + (2 * (FONT_HEIGHT + 1) + 1)
 214 #define HISCORE_X (LCD_WIDTH - PLAYFIELD_X - HISCORE_WIDTH)
 215 #define HISCORENUM_X (LCD_WIDTH - PLAYFIELD_X - 1 - 6 * NUMBERS_WIDTH - 5 * NUM_SPACING)
 216 #define SHIELD_Y (PLAYFIELD_Y - 6 * SHIP_HEIGHT)
 217 #define LIVES_X 10
 218 #define MAX_X 95
 219 #define MAX_Y 18
 220
 221
 222 #elif (LCD_WIDTH == 176) && (LCD_HEIGHT == 220)
 223
 224 /* Sandisk Sansa e200: 176x220x16
 225  * ==============================
 226  * X: No padding. 8p border -> 160p playfield.
 227  *
 228  * 8p Aliens with 3p spacing -> 88 + 30 = 118p aliens block.
 229  * (160 - 118) / 2 = 21 rounds for whole block (more than original)
 230  * MAX_X = (160 - 8) / 2 - 1 = 75 rounds for single alien (less than original)
 231  *
 232  *    LOGO       70       0
 233  *    Score text 5        70
 234  *    Space      5        75
 235  * Y  Score      5        80
 236  *    Space      10       85
 237  * 2  Ufo        5        95
 238  * 2  Space      10      100
 239  * 0  aliens     9*5     110 -
 240  *    space     ~7*5     155  | 18.6 aliens space between
 241  *    shield     2*5     188  | first alien and ship.
 242  *    space      5       198  | MAX_Y = 18
 243  *    ship       5       203 -
 244  *    space      5       208
 245  *    hline      1       213 PLAYFIELD_Y
 246  *    bottom border 6
 247  *    LCD_HEIGHT         220
 248  *    Lives and Level goes inside bottom border
 249  */
 250
 251 #define TINY_GRAPHICS
 252 #define PLAYFIELD_X 0
 253 #define SHIP_Y (PLAYFIELD_Y - 2 * SHIP_HEIGHT)
 254 #define SHIELD_Y (SHIP_Y - SHIP_HEIGHT - SHIELD_HEIGHT)
 255 #define ALIEN_START_Y (UFO_Y + 3 * SHIP_HEIGHT)
 256 /* Redefine SCORE_Y */
 257 #undef SCORE_Y
 258 #define SCORE_Y 70
 259 #define SCORENUM_X (PLAYFIELD_X + NUMBERS_WIDTH)
 260 #define SCORENUM_Y (SCORE_Y + 2 * FONT_HEIGHT)
 261 #define HISCORE_X (LCD_WIDTH - PLAYFIELD_X - HISCORE_WIDTH)
 262 #define HISCORENUM_X (LCD_WIDTH - PLAYFIELD_X - 1 - 6 * NUMBERS_WIDTH - 5 * NUM_SPACING)
 263 #define LIVES_X 8
 264 #define MAX_X 75
 265 #define MAX_Y 18
 266
 267
 268 #elif (LCD_WIDTH == 176) && (LCD_HEIGHT == 132)
 269
 270 /* iPod Nano: 176x132x16
 271  * ======================
 272  * X: No padding. 8p border -> 160p playfield.
 273  *
 274  *    LIVES_X 8
 275  *    ALIEN_WIDTH 8
 276  *    ALIEN_HEIGHT 5
 277  *    ALIEN_SPACING 3
 278  *    SHIP_WIDTH 10
 279  *    SHIP_HEIGHT 5
 280  *    FONT_HEIGHT 5
 281  *    UFO_WIDTH 10
 282  *    UFO_HEIGHT 5
 283  *    SHIELD_WIDTH 15
 284  *    SHIELD_HEIGHT 10
 285  *    MAX_X 75
 286  *    MAX_Y = 18
 287  *    ALIEN_START_Y (UFO_Y + 12)
 288  *
 289  * 8p Aliens with 3p spacing -> 88 + 30 = 118p aliens block.
 290  * (160 - 118) / 2 = 21 rounds for whole block (more than original)
 291  * MAX_X = (160 - 8) / 2 - 1 = 75 rounds for single alien (less than original)
 292  *
 293  * Y: Scoreline  5         0 (combine scoretext and numbers on same line)
 294  *    Space      5         5
 295  * 1  Ufo        5        10
 296  * 3  Space      7        15
 297  * 2  aliens     9*5      22 -
 298  *    space     ~7*5      67  | Just above 18 aliens space between
 299  *    shield     2*5     100  | first alien and ship.
 300  *    space      5       110  | MAX_Y = 18
 301  *    ship       5       115 -
 302  *    space      5       120
 303  *    hline      1       125 PLAYFIELD_Y
 304  *    bottom border 6    126
 305  *    LCD_HEIGHT         131
 306  *    Lives and Level goes inside bottom border
 307  */
 308
 309 #define TINY_GRAPHICS
 310 #define PLAYFIELD_X 0
 311 #define SHIP_Y (PLAYFIELD_Y - 2 * SHIP_HEIGHT)
 312 #define ALIEN_START_Y (UFO_Y + 12)
 313 #define SCORENUM_X (PLAYFIELD_X + SCORE_WIDTH + NUMBERS_WIDTH + NUM_SPACING)
 314 #define SCORENUM_Y SCORE_Y
 315 #define HISCORENUM_X (LCD_WIDTH - PLAYFIELD_X - 4 * NUMBERS_WIDTH - 3 * NUM_SPACING)
 316 #define HISCORE_X (HISCORENUM_X - NUMBERS_WIDTH - NUM_SPACING - HISCORE_WIDTH)
 317 #define SHIELD_Y (SHIP_Y - SHIP_HEIGHT - SHIELD_HEIGHT)
 318 #define LIVES_X 8
 319 #define MAX_X 75
 320 #define MAX_Y 18
 321
 322 #elif (LCD_WIDTH == 160) && (LCD_HEIGHT == 128)
 323
 324 /* iAudio X5, iRiver H10 20Gb, iPod 3g/4g: 160x128x16
 325  * ======================================
 326  * X: No padding. No border -> 160p playfield.
 327  *
 328  *    LIVES_X 0
 329  *    ALIEN_WIDTH 8
 330  *    ALIEN_HEIGHT 5
 331  *    ALIEN_SPACING 3
 332  *    SHIP_WIDTH 10
 333  *    SHIP_HEIGHT 5
 334  *    FONT_HEIGHT 5
 335  *    UFO_WIDTH 10
 336  *    UFO_HEIGHT 5
 337  *    SHIELD_WIDTH 15
 338  *    SHIELD_HEIGHT 10
 339  *    MAX_X 75
 340  *    MAX_Y = 18
 341  *    ALIEN_START_Y (UFO_Y + 10)
 342  *
 343  * 8p Aliens with 3p spacing -> 88 + 30 = 118p aliens block.
 344  * (160 - 118) / 2 = 21 rounds for whole block (more than original)
 345  * MAX_X = (160 - 8) / 2 - 1 = 75 rounds for single alien (less than original)
 346  *
 347  * Y: Scoreline  5         0 (combine scoretext and numbers on same line)
 348  *    Space      5         5
 349  * 1  Ufo        5        10
 350  * 2  Space      5        15
 351  * 8  aliens     9*5      20 -
 352  *    space     ~6*5      65  | Just above 18 aliens space between
 353  *    shield     2*5      96  | first alien and ship.
 354  *    space      5       106  | MAX_Y = 18
 355  *    ship       5       111 -
 356  *    space      5       116
 357  *    hline      1       121 PLAYFIELD_Y
 358  *    bottom border 6    122
 359  *    LCD_HEIGHT         128
 360  *    Lives and Level goes inside bottom border
 361  */
 362
 363 #define TINY_GRAPHICS
 364 #define PLAYFIELD_X 0
 365 #define SHIP_Y (PLAYFIELD_Y - 2 * SHIP_HEIGHT)
 366 #define ALIEN_START_Y (UFO_Y + 10)
 367 #define SCORENUM_X (PLAYFIELD_X + SCORE_WIDTH + NUMBERS_WIDTH + NUM_SPACING)
 368 #define SCORENUM_Y SCORE_Y
 369 #define HISCORENUM_X (LCD_WIDTH - PLAYFIELD_X - 4 * NUMBERS_WIDTH - 3 * NUM_SPACING)
 370 #define HISCORE_X (HISCORENUM_X - NUMBERS_WIDTH - NUM_SPACING - HISCORE_WIDTH)
 371 #define SHIELD_Y (SHIP_Y - SHIP_HEIGHT - SHIELD_HEIGHT)
 372 #define LIVES_X 0
 373 #define MAX_X 75
 374 #define MAX_Y 18
 375
 376
 377 #elif (LCD_WIDTH == 240) && (LCD_HEIGHT == 320)
 378
 379 /* Gigabeat: 240x320x16
 380  * ======================
 381  * X: 8p padding at left/right gives 224p playfield in middle.
 382  *    10p "border" gives 204p actual playfield. UFO use full 224p.
 383  * Y: Use bottom 240p for playfield and top 80 pixels for logo.
 384  *
 385  * MAX_X = (204 - 12) / 2 - 1 = 95
 386  *
 387  * Y: Score text 7       0   + 80
 388  *    Space      10      7   + 80
 389  *    Score      7       17  + 80
 390  *    Space      8       24  + 80
 391  * 3  Ufo        7       32  + 80
 392  * 2  Space      Aliens start at 32 + 3 * 8 = 56
 393  * 0  aliens     9*8     56  -
 394  *    space     ~7*8     128  | 18.75 aliens space between
 395  *    shield     2*8     182  | first alien and ship.
 396  *    space      8       198  | MAX_Y = 18
 397  *    ship       8       206 -
 398  *    space      2*8     214
 399  *    hline      1       230 310  - PLAYFIELD_Y
 400  *    bottom border 10   240 320
 401  *    Lives and Level goes inside bottom border
 402  */
 403
 404 #define ARCADISH_GRAPHICS
 405 #define PLAYFIELD_X 8
 406 #define SHIP_Y (PLAYFIELD_Y - 3 * SHIP_HEIGHT)
 407 #define ALIEN_START_Y (UFO_Y + 3 * ALIEN_HEIGHT)
 408 /* Redefine SCORE_Y */
 409 #undef SCORE_Y
 410 #define SCORE_Y 80
 411 #define SCORENUM_X (PLAYFIELD_X + NUMBERS_WIDTH)
 412 #define SCORENUM_Y SCORE_Y + (2 * (FONT_HEIGHT + 1) + 1)
 413 #define HISCORE_X (LCD_WIDTH - PLAYFIELD_X - HISCORE_WIDTH)
 414 #define HISCORENUM_X (LCD_WIDTH - PLAYFIELD_X - 1 - 6 * NUMBERS_WIDTH - 5 * NUM_SPACING)
 415 #define SHIELD_Y (PLAYFIELD_Y - 6 * SHIP_HEIGHT)
 416 #define LIVES_X 10
 417 #define MAX_X 95
 418 #define MAX_Y 18
 419
 420 #elif (LCD_WIDTH == 220) && (LCD_HEIGHT == 176)
 421
 422 /* TPJ1022, H300, iPod Color: 220x176x16
 423  * ============================
 424  * X: 0p padding at left/right gives 220p playfield in middle.
 425  *    8p "border" gives 204p actual playfield. UFO use full 220p.
 426  * Y: Use full 176p for playfield.
 427  *
 428  * MAX_X = (204 - 12) / 2 - 1 = 95
 429  *
 430  * Y: Score text 7       0
 431  *    Space      8       7
 432  * 1  Ufo        7       15
 433  * 7  Space      Aliens start at 15 + 3 * 8 = 56
 434  * 6  aliens     9*8     25  -
 435  *    space     ~7*8     103  | 15.6 aliens space between
 436  *    shield     2*8     126  | first alien and ship.
 437  *    space      8       142  | MAX_Y = 15
 438  *    ship       8       150 -
 439  *    space      8       158
 440  *    hline      1       166 - PLAYFIELD_Y
 441  *    bottom border 10   176
 442  *    Lives and Level goes inside bottom border
 443  */
 444
 445 #define ARCADISH_GRAPHICS
 446 #define PLAYFIELD_X 0
 447 #define SHIP_Y (PLAYFIELD_Y - 2 * SHIP_HEIGHT)
 448 #define ALIEN_START_Y (UFO_Y + 10)
 449 #define SCORENUM_Y SCORE_Y
 450 #define SCORENUM_X (PLAYFIELD_X + SCORE_WIDTH + NUMBERS_WIDTH + NUM_SPACING)
 451 #define HISCORENUM_X (LCD_WIDTH - PLAYFIELD_X - 4 * NUMBERS_WIDTH - 3 * NUM_SPACING)
 452 #define HISCORE_X (HISCORENUM_X - NUMBERS_WIDTH - NUM_SPACING - HISCORE_WIDTH)
 453 #define SHIELD_Y (PLAYFIELD_Y - 5 * SHIP_HEIGHT)
 454 #define LIVES_X 8
 455 #define MAX_X 95
 456 #define MAX_Y 15
 457
 458 #else
 459     #error INVADROX: Unsupported LCD type
 460 #endif
 461
 462
 463 /* Defines common to each "graphic type" */
 464 #ifdef ARCADISH_GRAPHICS
 465
 466 #define STRIDE 71
 467 #define SHIP_SRC_X 24
 468 #define SHIP_WIDTH 16
 469 #define SHIP_HEIGHT 8
 470 #define SHOT_HEIGHT 5
 471 #define ALIEN_WIDTH 12
 472 #define ALIEN_EXPLODE_SRC_X 52
 473 #define ALIEN_EXPLODE_SRC_Y 39
 474 #define ALIEN_EXPLODE_WIDTH 13
 475 #define ALIEN_EXPLODE_HEIGHT 7
 476 #define ALIEN_HEIGHT 8
 477 #define ALIEN_SPACING 4
 478 #define ALIEN_SPEED 2
 479 #define UFO_SRC_X 40
 480 #define UFO_WIDTH 16
 481 #define UFO_HEIGHT 7
 482 #define UFO_EXPLODE_WIDTH 21
 483 #define UFO_EXPLODE_HEIGHT 8
 484 #define UFO_SPEED 1
 485 #define FONT_HEIGHT 7
 486 #define LEVEL_SRC_Y 24
 487 #define LEVEL_WIDTH 37
 488 #define SCORE_SRC_X 24
 489 #define SCORE_SRC_Y 31
 490 #define SCORE_WIDTH 37
 491 #define HISCORE_WIDTH 61
 492 #define NUM_SPACING 3
 493 #define NUMBERS_SRC_Y 38
 494 #define NUMBERS_WIDTH 5
 495 #define SHIELD_SRC_X 40
 496 #define SHIELD_SRC_Y 15
 497 #define SHIELD_WIDTH 22
 498 #define SHIELD_HEIGHT 16
 499 #define FIRE_WIDTH 8
 500 #define FIRE_HEIGHT 8
 501 #define FIRE_SPEED 8
 502 #define BOMB_SRC_X 62
 503 #define BOMB_WIDTH 3
 504 #define BOMB_HEIGHT 7
 505 #define BOMB_SPEED 3
 506 #define ALIENS 11
 507 unsigned char fire_sprite[FIRE_HEIGHT] = {
 508     (1 << 7) | (0 << 6) | (0 << 5) | (0 << 4) | (1 << 3) | (0 << 2) | (0 << 1) | 1,
 509     (0 << 7) | (0 << 6) | (1 << 5) | (0 << 4) | (0 << 3) | (0 << 2) | (1 << 1) | 0,
 510     (0 << 7) | (1 << 6) | (1 << 5) | (1 << 4) | (1 << 3) | (1 << 2) | (1 << 1) | 0,
 511     (1 << 7) | (1 << 6) | (1 << 5) | (1 << 4) | (1 << 3) | (1 << 2) | (1 << 1) | 1,
 512     (0 << 7) | (1 << 6) | (1 << 5) | (1 << 4) | (1 << 3) | (1 << 2) | (1 << 1) | 1,
 513     (0 << 7) | (1 << 6) | (1 << 5) | (1 << 4) | (1 << 3) | (1 << 2) | (1 << 1) | 0,
 514     (0 << 7) | (0 << 6) | (1 << 5) | (0 << 4) | (0 << 3) | (1 << 2) | (0 << 1) | 0,
 515     (1 << 7) | (0 << 6) | (0 << 5) | (1 << 4) | (0 << 3) | (0 << 2) | (0 << 1) | 1
 516 };
 517
 518 #elif defined TINY_GRAPHICS
 519
 520 #define STRIDE 53
 521 #define SHIP_SRC_X 16
 522 #define SHIP_WIDTH 10
 523 #define SHIP_HEIGHT 5
 524 #define SHOT_HEIGHT 4
 525 #define ALIEN_WIDTH 8
 526 #define ALIEN_HEIGHT 5
 527 #define ALIEN_EXPLODE_SRC_X 40
 528 #define ALIEN_EXPLODE_SRC_Y 26
 529 #define ALIEN_EXPLODE_WIDTH 10
 530 #define ALIEN_EXPLODE_HEIGHT 5
 531 #define ALIEN_SPACING 3
 532 #define ALIEN_SPEED 2
 533 #define UFO_SRC_X 26
 534 #define UFO_WIDTH 11
 535 #define UFO_HEIGHT 5
 536 #define UFO_EXPLODE_WIDTH 14
 537 #define UFO_EXPLODE_HEIGHT 5
 538 #define UFO_SPEED 1
 539 #define FONT_HEIGHT 5
 540 #define LEVEL_SRC_Y 15
 541 #define LEVEL_WIDTH 29
 542 #define NUMBERS_WIDTH 4
 543 #define NUM_SPACING 2
 544 #define SCORE_SRC_X 17
 545 #define SCORE_SRC_Y 20
 546 #define SCORE_WIDTH 28
 547 #define HISCORE_WIDTH 45
 548 #define NUMBERS_SRC_Y 25
 549 #define SHIELD_SRC_X 29
 550 #define SHIELD_SRC_Y 10
 551 #define SHIELD_WIDTH 15
 552 #define SHIELD_HEIGHT 10
 553 #define FIRE_WIDTH 6
 554 #define FIRE_HEIGHT 6
 555 #define FIRE_SPEED 6
 556 #define BOMB_SRC_X 44
 557 #define BOMB_WIDTH 3
 558 #define BOMB_HEIGHT 5
 559 #define BOMB_SPEED 2
 560 #define ALIENS 11
 561 unsigned char fire_sprite[FIRE_HEIGHT] = {
 562     (1 << 5) | (0 << 4) | (0 << 3) | (1 << 2) | (0 << 1) | 1,
 563     (0 << 5) | (1 << 4) | (0 << 3) | (0 << 2) | (0 << 1) | 0,
 564     (0 << 5) | (1 << 4) | (1 << 3) | (1 << 2) | (1 << 1) | 0,
 565     (0 << 5) | (1 << 4) | (1 << 3) | (1 << 2) | (1 << 1) | 1,
 566     (0 << 5) | (1 << 4) | (0 << 3) | (0 << 2) | (1 << 1) | 0,
 567     (1 << 5) | (0 << 4) | (1 << 3) | (0 << 2) | (0 << 1) | 1
 568 };
 569
 570 #else
 571     #error Graphic type not defined
 572 #endif
 573
 574
 575 /* Colors */
 576 #if (LCD_DEPTH >= 8)
 577 #define SLIME_GREEN LCD_RGBPACK(31, 254, 31)
 578 #define UFO_RED LCD_RGBPACK(254, 31, 31)
 579 #elif (LCD_DEPTH == 2)
 580 #define SLIME_GREEN LCD_LIGHTGRAY
 581 #define UFO_RED LCD_LIGHTGRAY
 582 #else
 583 #error LCD type not implemented yet
 584 #endif
 585
 586 /* Alien states */
 587 #define DEAD 0
 588 #define ALIVE 1
 589 #define BOMBER 2
 590
 591 /* Fire/bomb/ufo states */
 592 #define S_IDLE 0
 593 #define S_ACTIVE 1
 594 #define S_SHOWSCORE 2
 595 #define S_EXPLODE -9
 596
 597 /* Fire/bomb targets */
 598 #define TARGET_TOP 0
 599 #define TARGET_SHIELD 1
 600 #define TARGET_SHIP 2
 601 #define TARGET_BOTTOM 3
 602 #define TARGET_UFO 4
 603
 604 #define HISCOREFILE PLUGIN_GAMES_DIR "/invadrox.high"
 605
 606
 607 /* The time (in ms) for one iteration through the game loop - decrease this
 608  * to speed up the game - note that current_tick is (currently) only accurate
 609  * to 10ms.
 610  */
 611 #define CYCLETIME 40
 612
 613
 614 /* Physical x is at PLAYFIELD_X + LIVES_X + x * ALIEN_SPEED
 615  * Physical y is at y * ALIEN_HEIGHT
 616  */
 617 struct alien {
 618     unsigned char x;     /* x-coordinate (0 - 95) */
 619     unsigned char y;     /* y-coordinate (0 - 18) */
 620     unsigned char type;  /* 0 (Kang), 1 (Kodos), 2 (Serak) */
 621     unsigned char state; /* Dead, alive or bomber */
 622 };
 623
 624 /* Aliens box 5 rows * ALIENS aliens in each row */
 625 struct alien aliens[5 * ALIENS];
 626
 627 #define MAX_BOMBS 4
 628 struct bomb {
 629     int x, y;
 630     unsigned char type;
 631     unsigned char frame; /* Current animation frame */
 632     unsigned char frames; /* Number of frames in animation */
 633     unsigned char target; /* Remember target during explosion frames */
 634     int state; /* 0 (IDLE) = inactive, 1 (FIRE) or negative, exploding */
 635 };
 636 struct bomb bombs[MAX_BOMBS];
 637 /* Increase max_bombs at higher levels */
 638 int max_bombs;
 639
 640 /* Raw framebuffer value of shield/ship green color */
 641 fb_data screen_green, screen_white;
 642
 643 /* For optimization, precalculate startoffset of each scanline */
 644 unsigned int ytab[LCD_HEIGHT];
 645
 646 /* external bitmaps */
 647 extern const fb_data invadrox[];
 648 #if (LCD_WIDTH == 320) && (LCD_HEIGHT == 240)
 649 /* iPod Video only */
 650 extern const fb_data invadrox_left[];
 651 extern const fb_data invadrox_right[];
 652 #endif
 653 #if ((LCD_WIDTH == 240) && (LCD_HEIGHT == 320)) || ((LCD_WIDTH == 176) && (LCD_HEIGHT == 220))
 654 /* Gigabeat F, Sansa e200 */
 655 extern const fb_data invadrox_logo[];
 656 #endif
 657
 658
 659 int lives = 2;
 660 int score = 0;
 661 int scores[3] = { 30, 20, 10 };
 662 int level = 0;
 663 struct highscore hiscore;
 664 bool game_over = false;
 665 int ship_x, old_ship_x, ship_dir, ship_acc, max_ship_speed;
 666 int ship_frame, ship_frame_counter;
 667 bool ship_hit;
 668 int fire, fire_target, fire_x, fire_y;
 669 int curr_alien, aliens_paralyzed, gamespeed;
 670 int ufo_state, ufo_x;
 671 bool level_finished;
 672 bool aliens_down, aliens_right, hit_left_border, hit_right_border;
 673
 674
 675 /* No standard get_pixel function yet, use this hack instead */
 676 #if (LCD_DEPTH >= 8)
 677
 678 inline fb_data get_pixel(int x, int y)
 679 {
 680     return rb->lcd_framebuffer[ytab[y] + x];
 681 }
 682
 683 #elif (LCD_DEPTH == 2)
 684
 685 #if (LCD_PIXELFORMAT == HORIZONTAL_PACKING)
 686 static const unsigned char shifts[4] = {
 687     6, 4, 2, 0
 688 };
 689 /* Horizontal packing */
 690 inline fb_data get_pixel(int x, int y)
 691 {
 692     return (rb->lcd_framebuffer[ytab[y] + (x >> 2)] >> shifts[x & 3]) & 3;
 693 }
 694 #else
 695 /* Vertical packing */
 696 static const unsigned char shifts[4] = {
 697     0, 2, 4, 6
 698 };
 699 inline fb_data get_pixel(int x, int y)
 700 {
 701     return (rb->lcd_framebuffer[ytab[y] + x] >> shifts[y & 3]) & 3;
 702 }
 703 #endif /* Horizontal/Vertical packing */
 704
 705 #else
 706     #error get_pixel: pixelformat not implemented yet
 707 #endif
 708
 709
 710 /* Draw "digits" least significant digits of num at (x,y) */
 711 void draw_number(int x, int y, int num, int digits)
 712 {
 713     int i;
 714     int d;
 715
 716     for (i = digits - 1; i >= 0; i--) {
 717         d = num % 10;
 718         num = num / 10;
 719         rb->lcd_bitmap_part(invadrox, d * NUMBERS_WIDTH, NUMBERS_SRC_Y,
 720                             STRIDE, x + i * (NUMBERS_WIDTH + NUM_SPACING), y,
 721                             NUMBERS_WIDTH, FONT_HEIGHT);
 722     }
 723     /* Update lcd */
 724     rb->lcd_update_rect(x, y, 4 * NUMBERS_WIDTH + 3 * NUM_SPACING, FONT_HEIGHT);
 725 }
 726
 727
 728 inline void draw_score(void)
 729 {
 730     draw_number(SCORENUM_X, SCORENUM_Y, score, 4);
 731     if (score > hiscore.score) {
 732         /* Draw new hiscore (same as score) */
 733         draw_number(HISCORENUM_X, SCORENUM_Y, score, 4);
 734     }
 735 }
 736
 737
 738 void draw_level(void)
 739 {
 740     rb->lcd_bitmap_part(invadrox, 0, LEVEL_SRC_Y,
 741                         STRIDE, LEVEL_X, PLAYFIELD_Y + 2,
 742                         LEVEL_WIDTH, FONT_HEIGHT);
 743     draw_number(LEVEL_X + LEVEL_WIDTH + 2 * NUM_SPACING, PLAYFIELD_Y + 2, level, 2);
 744 }
 745
 746
 747 void draw_lives(void)
 748 {
 749     int i;
 750     /* Lives num */
 751     rb->lcd_bitmap_part(invadrox, lives * NUMBERS_WIDTH, NUMBERS_SRC_Y,
 752                         STRIDE, PLAYFIELD_X + LIVES_X, PLAYFIELD_Y + 2,
 753                         NUMBERS_WIDTH, FONT_HEIGHT);
 754
 755     /* Ships */
 756     for (i = 0; i < (lives - 1); i++) {
 757         rb->lcd_bitmap_part(invadrox, SHIP_SRC_X, 0, STRIDE,
 758                             PLAYFIELD_X + LIVES_X + SHIP_WIDTH + i * (SHIP_WIDTH + NUM_SPACING),
 759                             PLAYFIELD_Y + 1, SHIP_WIDTH, SHIP_HEIGHT);
 760     }
 761
 762     /* Erase ship to the righ (if less than MAX_LIVES) */
 763     if (lives < MAX_LIVES) {
 764         rb->lcd_fillrect(PLAYFIELD_X + LIVES_X + SHIP_WIDTH + i * (SHIP_WIDTH + NUM_SPACING),
 765                          PLAYFIELD_Y + 1, SHIP_WIDTH, SHIP_HEIGHT);
 766     }
 767     /* Update lives (and level) part of screen */
 768     rb->lcd_update_rect(PLAYFIELD_X + LIVES_X, PLAYFIELD_Y + 1,
 769                         PLAYFIELD_WIDTH - 2 * LIVES_X, MAX(FONT_HEIGHT + 1, SHIP_HEIGHT + 1));
 770 }
 771
 772
 773 inline void draw_aliens(void)
 774 {
 775     int i;
 776
 777     for (i = 0; i < 5 * ALIENS; i++) {
 778         rb->lcd_bitmap_part(invadrox, aliens[i].x & 1 ? ALIEN_WIDTH : 0, aliens[i].type * ALIEN_HEIGHT,
 779                             STRIDE, PLAYFIELD_X + LIVES_X + aliens[i].x * ALIEN_SPEED,
 780                             ALIEN_START_Y + aliens[i].y * ALIEN_HEIGHT,
 781                             ALIEN_WIDTH, ALIEN_HEIGHT);
 782     }
 783 }
 784
 785
 786 /* Return false if there is no next alive alien (round is over) */
 787 inline bool next_alien(void)
 788 {
 789     bool ret = true;
 790
 791     do {
 792         curr_alien++;
 793         if (curr_alien % ALIENS == 0) {
 794             /* End of this row. Move up one row. */
 795             curr_alien -= 2 * ALIENS;
 796             if (curr_alien < 0) {
 797                 /* No more aliens in this round. */
 798                 curr_alien = 4 * ALIENS;
 799                 ret = false;
 800             }
 801         }
 802     } while (aliens[curr_alien].state == DEAD && ret);
 803
 804     if (!ret) {
 805         /* No more alive aliens. Round finished. */
 806         if (hit_right_border) {
 807             if (hit_left_border) {
 808                 DBG("ERROR: both left and right borders are set (%d)\n", curr_alien);
 809             }
 810             /* Move down-left next round */
 811             aliens_right = false;
 812             aliens_down = true;
 813             hit_right_border = false;
 814         } else if (hit_left_border) {
 815             /* Move down-right next round */
 816             aliens_right = true;
 817             aliens_down = true;
 818             hit_left_border = false;
 819         } else {
 820             /* Not left nor right. Set down to false. */
 821             aliens_down = false;
 822         }
 823     }
 824
 825     return ret;
 826 }
 827
 828
 829 /* All aliens have been moved.
 830  * Set curr_alien to first alive.
 831  * Return false if no-one is left alive.
 832  */
 833 bool first_alien(void)
 834 {
 835     int i, y;
 836
 837     for (y = 4; y >= 0; y--) {
 838         for (i = y * ALIENS; i < (y + 1) * ALIENS; i++) {
 839             if (aliens[i].state != DEAD) {
 840                 curr_alien = i;
 841                 return true;
 842             }
 843         }
 844     }
 845
 846     /* All aliens dead. */
 847     level_finished = true;
 848
 849     return false;
 850 }
 851
 852
 853 bool move_aliens(void)
 854 {
 855     int x, y, old_x, old_y;
 856
 857     /* Move current alien (curr_alien is pointing to a living alien) */
 858
 859     old_x = aliens[curr_alien].x;
 860     old_y = aliens[curr_alien].y;
 861
 862     if (aliens_down) {
 863         aliens[curr_alien].y++;
 864         if (aliens[curr_alien].y == MAX_Y) {
 865             /* Alien is at bottom. Game Over. */
 866             DBG("Alien %d is at bottom. Game Over.\n", curr_alien);
 867             game_over = true;
 868             return false;
 869         }
 870     }
 871
 872     if (aliens_right) {
 873         /* Moving right */
 874         if (aliens[curr_alien].x < MAX_X) {
 875             aliens[curr_alien].x++;
 876         }
 877
 878         /* Now, after move, check if we hit the right border. */
 879         if (aliens[curr_alien].x == MAX_X) {
 880             hit_right_border = true;
 881         }
 882
 883     } else {
 884         /* Moving left */
 885         if (aliens[curr_alien].x > 0) {
 886             aliens[curr_alien].x--;
 887         }
 888
 889         /* Now, after move, check if we hit the left border. */
 890         if (aliens[curr_alien].x == 0) {
 891             hit_left_border = true;
 892         }
 893     }
 894
 895     /* Erase old position */
 896     x = PLAYFIELD_X + LIVES_X + old_x * ALIEN_SPEED;
 897     y = ALIEN_START_Y + old_y * ALIEN_HEIGHT;
 898     if (aliens[curr_alien].y != old_y) {
 899         /* Moved in y-dir. Erase whole alien. */
 900         rb->lcd_fillrect(x, y, ALIEN_WIDTH, ALIEN_HEIGHT);
 901     } else {
 902         if (aliens_right) {
 903             /* Erase left edge */
 904             rb->lcd_fillrect(x, y, ALIEN_SPEED, ALIEN_HEIGHT);
 905         } else {
 906             /* Erase right edge */
 907             x += ALIEN_WIDTH - ALIEN_SPEED;
 908             rb->lcd_fillrect(x, y, ALIEN_SPEED, ALIEN_HEIGHT);
 909         }
 910     }
 911
 912     /* Draw alien at new pos */
 913     x = PLAYFIELD_X + LIVES_X + aliens[curr_alien].x * ALIEN_SPEED;
 914     y = ALIEN_START_Y + aliens[curr_alien].y * ALIEN_HEIGHT;
 915     rb->lcd_bitmap_part(invadrox,
 916                         aliens[curr_alien].x & 1 ? ALIEN_WIDTH : 0, aliens[curr_alien].type * ALIEN_HEIGHT,
 917                         STRIDE, x, y, ALIEN_WIDTH, ALIEN_HEIGHT);
 918
 919     if (!next_alien()) {
 920         /* Round finished. Set curr_alien to first alive from bottom. */
 921         if (!first_alien()) {
 922             /* Should never happen. Taken care of in move_fire(). */
 923             return false;
 924         }
 925         /* TODO: Play next background sound */
 926     }
 927
 928     return true;
 929 }
 930
 931
 932 inline void draw_ship(void)
 933 {
 934     /* Erase old ship */
 935     if (old_ship_x < ship_x) {
 936         /* Move right. Erase leftmost part of ship. */
 937         rb->lcd_fillrect(old_ship_x, SHIP_Y, ship_x - old_ship_x, SHIP_HEIGHT);
 938     } else if (old_ship_x > ship_x) {
 939         /* Move left. Erase rightmost part of ship. */
 940         rb->lcd_fillrect(ship_x + SHIP_WIDTH, SHIP_Y, old_ship_x - ship_x, SHIP_HEIGHT);
 941     }
 942
 943     /* Draw ship */
 944     rb->lcd_bitmap_part(invadrox, SHIP_SRC_X, ship_frame * SHIP_HEIGHT,
 945                         STRIDE, ship_x, SHIP_Y, SHIP_WIDTH, SHIP_HEIGHT);
 946     if (ship_hit) {
 947         /* Alternate between frame 1 and 2 during hit */
 948         ship_frame_counter++;
 949         if (ship_frame_counter > 2) {
 950             ship_frame_counter = 0;
 951             ship_frame++;
 952             if (ship_frame > 2) {
 953                 ship_frame = 1;
 954             }
 955         }
 956     }
 957
 958     /* Save ship_x for next time */
 959     old_ship_x = ship_x;
 960 }
 961
 962
 963 inline void fire_alpha(int xc, int yc, fb_data color)
 964 {
 965     int x, y;
 966     unsigned char mask;
 967
 968     rb->lcd_set_foreground(color);
 969
 970     for (y = 0; y < FIRE_HEIGHT; y++) {
 971         mask = 1 << (FIRE_WIDTH - 1);
 972         for (x = -(FIRE_WIDTH / 2); x < (FIRE_WIDTH / 2); x++) {
 973             if (fire_sprite[y] & mask) {
 974                 rb->lcd_drawpixel(xc + x, yc + y);
 975             }
 976             mask >>= 1;
 977         }
 978     }
 979
 980     rb->lcd_set_foreground(LCD_BLACK);
 981 }
 982
 983
 984 void move_fire(void)
 985 {
 986     bool hit_green = false;
 987     bool hit_white = false;
 988     int i, j;
 989     static int exploding_alien = -1;
 990     fb_data pix;
 991
 992     if (fire == S_IDLE) {
 993         return;
 994     }
 995
 996     /* Alien hit. Wait until explosion is finished. */
 997     if (aliens_paralyzed < 0) {
 998         aliens_paralyzed++;
 999         if (aliens_paralyzed == 0) {
1000             /* Erase exploding_alien */
1001             rb->lcd_fillrect(PLAYFIELD_X + LIVES_X + aliens[exploding_alien].x * ALIEN_SPEED,
1002                              ALIEN_START_Y + aliens[exploding_alien].y * ALIEN_HEIGHT,
1003                              ALIEN_EXPLODE_WIDTH, ALIEN_HEIGHT);
1004             fire = S_IDLE;
1005             /* Special case. We killed curr_alien. */
1006             if (exploding_alien == curr_alien) {
1007                 if (!next_alien()) {
1008                     /* Round finished. Set curr_alien to first alive from bottom. */
1009                     first_alien();
1010                 }
1011             }
1012         }
1013         return;
1014     }
1015
1016     if (fire == S_ACTIVE) {
1017
1018         /* Erase */
1019         rb->lcd_vline(fire_x, fire_y, fire_y + SHOT_HEIGHT);
1020
1021         /* Check top */
1022         if (fire_y <= SCORENUM_Y + FONT_HEIGHT + 4) {
1023
1024             /* TODO: Play explode sound */
1025
1026             fire = S_EXPLODE;
1027             fire_target = TARGET_TOP;
1028             fire_alpha(fire_x, fire_y, UFO_RED);
1029             return;
1030         }
1031
1032         /* Move */
1033         fire_y -= FIRE_SPEED;
1034
1035         /* Hit UFO? */
1036         if (ufo_state == S_ACTIVE) {
1037             if ((ABS(ufo_x + UFO_WIDTH / 2 - fire_x) <= UFO_WIDTH / 2) &&
1038                 (fire_y <= UFO_Y + UFO_HEIGHT)) {
1039                 ufo_state = S_EXPLODE;
1040                 fire = S_EXPLODE;
1041                 fire_target = TARGET_UFO;
1042                 /* Center explosion */
1043                 ufo_x -= (UFO_EXPLODE_WIDTH - UFO_WIDTH) / 2;
1044                 rb->lcd_bitmap_part(invadrox, UFO_SRC_X, UFO_HEIGHT,
1045                                     STRIDE, ufo_x, UFO_Y - 1, UFO_EXPLODE_WIDTH, UFO_EXPLODE_HEIGHT);
1046                 return;
1047             }
1048         }
1049
1050         /* Hit bomb? (check position, not pixel value) */
1051         for (i = 0; i < max_bombs; i++) {
1052             if (bombs[i].state == S_ACTIVE) {
1053                 /* Count as hit if within BOMB_WIDTH pixels */
1054                 if ((ABS(bombs[i].x - fire_x) < BOMB_WIDTH) &&
1055                     (fire_y - bombs[i].y < BOMB_HEIGHT)) {
1056                     /* Erase bomb */
1057                     rb->lcd_fillrect(bombs[i].x, bombs[i].y, BOMB_WIDTH, BOMB_HEIGHT);
1058                     bombs[i].state = S_IDLE;
1059                     /* Explode ship fire */
1060                     fire = S_EXPLODE;
1061                     fire_target = TARGET_SHIELD;
1062                     fire_alpha(fire_x, fire_y, LCD_WHITE);
1063                     return;
1064                 }
1065             }
1066         }
1067
1068         /* Check for hit*/
1069         for (i = FIRE_SPEED; i >= 0; i--) {
1070             pix = get_pixel(fire_x, fire_y + i);
1071             if(pix == screen_white) {
1072                 hit_white = true;
1073                 fire_y += i;
1074                 break;
1075             }
1076             if(pix == screen_green) {
1077                 hit_green = true;
1078                 fire_y += i;
1079                 break;
1080             }
1081         }
1082
1083         if (hit_green) {
1084             /* Hit shield */
1085
1086             /* TODO: Play explode sound */
1087
1088             fire = S_EXPLODE;
1089             fire_target = TARGET_SHIELD;
1090             /* Center explosion around hit pixel */
1091             fire_y -= FIRE_HEIGHT / 2;
1092             fire_alpha(fire_x, fire_y, SLIME_GREEN);
1093             return;
1094         }
1095
1096         if (hit_white) {
1097
1098             /* Hit alien? */
1099             for (i = 0; i < 5 * ALIENS; i++) {
1100                 if (aliens[i].state != DEAD &&
1101                     (ABS(fire_x - (PLAYFIELD_X + LIVES_X + aliens[i].x * ALIEN_SPEED +
1102                                    ALIEN_WIDTH / 2)) <= ALIEN_WIDTH / 2) &&
1103                     (ABS(fire_y - (ALIEN_START_Y + aliens[i].y * ALIEN_HEIGHT +
1104                                    ALIEN_HEIGHT / 2)) <= ALIEN_HEIGHT / 2)) {
1105
1106                     /* TODO: play alien hit sound */
1107
1108                     if (aliens[i].state == BOMBER) {
1109                         /* Set (possible) alien above to bomber */
1110                         for (j = i - ALIENS; j >= 0; j -= ALIENS) {
1111                             if (aliens[j].state != DEAD) {
1112                                 /* printf("New bomber (%d, %d)\n", j % ALIENS, j / ALIENS); */
1113                                 aliens[j].state = BOMBER;
1114                                 break;
1115                             }
1116                         }
1117                     }
1118                     aliens[i].state = DEAD;
1119                     exploding_alien = i;
1120                     score += scores[aliens[i].type];
1121                     draw_score();
1122                     /* Update score part of screen */
1123                     rb->lcd_update_rect(SCORENUM_X, SCORENUM_Y,
1124                                         PLAYFIELD_WIDTH - 2 * NUMBERS_WIDTH, FONT_HEIGHT);
1125
1126                     /* Paralyze aliens S_EXPLODE frames */
1127                     aliens_paralyzed = S_EXPLODE;
1128                     rb->lcd_bitmap_part(invadrox, ALIEN_EXPLODE_SRC_X, ALIEN_EXPLODE_SRC_Y,
1129                                         STRIDE, PLAYFIELD_X + LIVES_X + aliens[i].x * ALIEN_SPEED,
1130                                         ALIEN_START_Y + aliens[i].y * ALIEN_HEIGHT,
1131                                         ALIEN_EXPLODE_WIDTH, ALIEN_EXPLODE_HEIGHT);
1132                     /* Since alien is 1 pixel taller than explosion sprite, erase bottom line */
1133                     rb->lcd_hline(PLAYFIELD_X + LIVES_X + aliens[i].x * ALIEN_SPEED,
1134                                   PLAYFIELD_X + LIVES_X + aliens[i].x * ALIEN_SPEED + ALIEN_WIDTH,
1135                                   ALIEN_START_Y + (aliens[i].y + 1) * ALIEN_HEIGHT - 1);
1136                     return;
1137                 }
1138             }
1139         }
1140
1141         /* Draw shot */
1142         rb->lcd_set_foreground(LCD_WHITE);
1143         rb->lcd_vline(fire_x, fire_y, fire_y + SHOT_HEIGHT);
1144         rb->lcd_set_foreground(LCD_BLACK);
1145     } else if (fire < S_IDLE) {
1146         /* Count up towards S_IDLE, then erase explosion */
1147         fire++;
1148         if (fire == S_IDLE) {
1149             /* Erase explosion */
1150             if (fire_target == TARGET_TOP) {
1151                 rb->lcd_fillrect(fire_x - (FIRE_WIDTH / 2), fire_y, FIRE_WIDTH, FIRE_HEIGHT);
1152             } else if (fire_target == TARGET_SHIELD) {
1153                 /* Draw explosion with black pixels */
1154                 fire_alpha(fire_x, fire_y, LCD_BLACK);
1155             }
1156         }
1157     }
1158 }
1159
1160
1161 /* Return a BOMBER alien */
1162 inline int random_bomber(void)
1163 {
1164     int i, col;
1165
1166     /* TODO: Weigh higher probability near ship */
1167     col = rb->rand() % ALIENS;
1168     for (i = col + 4 * ALIENS; i >= 0; i -= ALIENS) {
1169         if (aliens[i].state == BOMBER) {
1170             return i;
1171         }
1172     }
1173
1174     /* No BOMBER found in this col */
1175
1176     for (i = 0; i < 5 * ALIENS; i++) {
1177         if (aliens[i].state == BOMBER) {
1178             return i;
1179         }
1180     }
1181
1182     /* No BOMBER found at all (error?) */
1183
1184     return -1;
1185 }
1186
1187
1188 inline void draw_bomb(int i)
1189 {
1190     rb->lcd_bitmap_part(invadrox, BOMB_SRC_X + bombs[i].type * BOMB_WIDTH,
1191                         bombs[i].frame * (BOMB_HEIGHT + 1),
1192                         STRIDE, bombs[i].x, bombs[i].y,
1193                         BOMB_WIDTH, BOMB_HEIGHT);
1194     /* Advance frame */
1195     bombs[i].frame++;
1196     if (bombs[i].frame == bombs[i].frames) {
1197         bombs[i].frame = 0;
1198     }
1199 }
1200
1201
1202 void move_bombs(void)
1203 {
1204     int i, j, bomber;
1205     bool abort;
1206
1207     for (i = 0; i < max_bombs; i++) {
1208
1209         switch (bombs[i].state) {
1210
1211         case S_IDLE:
1212             if (ship_hit) {
1213                 continue;
1214             }
1215             bomber = random_bomber();
1216             if (bomber < 0) {
1217                 DBG("ERROR: No bomber available\n");
1218                 continue;
1219             }
1220             /* x, y */
1221             bombs[i].x = PLAYFIELD_X + LIVES_X + aliens[bomber].x * ALIEN_SPEED + ALIEN_WIDTH / 2;
1222             bombs[i].y = ALIEN_START_Y + (aliens[bomber].y + 1) * ALIEN_HEIGHT;
1223
1224             /* Check for duplets in x and y direction */
1225             abort = false;
1226             for (j = i - 1; j >= 0; j--) {
1227                 if ((bombs[j].state == S_ACTIVE) &&
1228                     ((bombs[i].x == bombs[j].x) || (bombs[i].y == bombs[j].y))) {
1229                     abort = true;
1230                     break;
1231                 }
1232             }
1233             if (abort) {
1234                 /* Skip this one, continue with next bomb */
1235                 /* printf("Bomb %d duplet of %d\n", i, j); */
1236                 continue;
1237             }
1238
1239             /* Passed, set type */
1240             bombs[i].type = rb->rand() % 3;
1241             bombs[i].frame = 0;
1242             if (bombs[i].type == 0) {
1243                 bombs[i].frames = 3;
1244             } else if (bombs[i].type == 1) {
1245                 bombs[i].frames = 4;
1246             } else {
1247                 bombs[i].frames = 6;
1248             }
1249
1250             /* Bombs away */
1251             bombs[i].state = S_ACTIVE;
1252             draw_bomb(i);
1253             continue;
1254
1255             break;
1256
1257         case S_ACTIVE:
1258             /* Erase old position */
1259             rb->lcd_fillrect(bombs[i].x, bombs[i].y, BOMB_WIDTH, BOMB_HEIGHT);
1260
1261             /* Move */
1262             bombs[i].y += BOMB_SPEED;
1263
1264             /* Check if bottom hit */
1265             if (bombs[i].y + BOMB_HEIGHT >= PLAYFIELD_Y) {
1266                 bombs[i].y = PLAYFIELD_Y - FIRE_HEIGHT + 1;
1267                 fire_alpha(bombs[i].x, bombs[i].y, LCD_WHITE);
1268                 bombs[i].state = S_EXPLODE;
1269                 bombs[i].target = TARGET_BOTTOM;
1270                 break;
1271             }
1272
1273             /* Check for green (ship or shield) */
1274             for (j = BOMB_HEIGHT; j >= BOMB_HEIGHT - BOMB_SPEED; j--) {
1275                 bombs[i].target = 0;
1276                 if(get_pixel(bombs[i].x + BOMB_WIDTH / 2, bombs[i].y + j) == screen_green) {
1277                     /* Move to hit pixel */
1278                     bombs[i].x += BOMB_WIDTH / 2;
1279                     bombs[i].y += j;
1280
1281                     /* Check if ship is hit */
1282                     if (bombs[i].y > SHIELD_Y + SHIELD_HEIGHT && bombs[i].y < PLAYFIELD_Y) {
1283
1284                         /* TODO: play ship hit sound */
1285
1286                         ship_hit = true;
1287                         ship_frame = 1;
1288                         ship_frame_counter = 0;
1289                         bombs[i].state = S_EXPLODE * 4;
1290                         bombs[i].target = TARGET_SHIP;
1291                         rb->lcd_bitmap_part(invadrox, SHIP_SRC_X, 1 * SHIP_HEIGHT, STRIDE,
1292                                             ship_x, SHIP_Y, SHIP_WIDTH, SHIP_HEIGHT);
1293                         break;
1294                     }
1295                     /* Shield hit */
1296                     bombs[i].state = S_EXPLODE;
1297                     bombs[i].target = TARGET_SHIELD;
1298                     /* Center explosion around hit pixel in shield */
1299                     bombs[i].y -= FIRE_HEIGHT / 2;
1300                     fire_alpha(bombs[i].x, bombs[i].y, SLIME_GREEN);
1301                     break;
1302                 }
1303             }
1304
1305             if (bombs[i].target != 0) {
1306                 /* Hit ship or shield, continue */
1307                 continue;
1308             }
1309
1310             draw_bomb(i);
1311             break;
1312
1313         default:
1314             /* If we get here state should be < 0, exploding */
1315             bombs[i].state++;
1316             if (bombs[i].state == S_IDLE) {
1317                 if (ship_hit) {
1318                     /* Erase explosion */
1319                     rb->lcd_fillrect(ship_x, SHIP_Y, SHIP_WIDTH, SHIP_HEIGHT);
1320                     rb->lcd_update_rect(ship_x, SHIP_Y, SHIP_WIDTH, SHIP_HEIGHT);
1321                     ship_hit = false;
1322                     ship_frame = 0;
1323                     ship_x = PLAYFIELD_X + 2 * LIVES_X;
1324                     lives--;
1325                     if (lives == 0) {
1326                         game_over = true;
1327                         return;
1328                     }
1329                     draw_lives();
1330                     /* Sleep 1s to give player time to examine lives left */
1331                     rb->sleep(HZ);
1332                 }
1333                 /* Erase explosion (even if ship hit, might be another bomb) */
1334                 fire_alpha(bombs[i].x, bombs[i].y, LCD_BLACK);
1335             }
1336             break;
1337         }
1338     }
1339 }
1340
1341
1342 inline void move_ship(void)
1343 {
1344     ship_dir += ship_acc;
1345     if (ship_dir > max_ship_speed) {
1346         ship_dir = max_ship_speed;
1347     }
1348     if (ship_dir < -max_ship_speed) {
1349         ship_dir = -max_ship_speed;
1350     }
1351     ship_x += ship_dir;
1352     if (ship_x < SHIP_MIN_X) {
1353         ship_x = SHIP_MIN_X;
1354     }
1355     if (ship_x > SHIP_MAX_X) {
1356         ship_x = SHIP_MAX_X;
1357     }
1358
1359     draw_ship();
1360 }
1361
1362
1363 /* Unidentified Flying Object */
1364 void move_ufo(void)
1365 {
1366     static int ufo_speed;
1367     static int counter;
1368     int mystery_score;
1369
1370     switch (ufo_state) {
1371
1372     case S_IDLE:
1373
1374         if (rb->rand() % 500 == 0) {
1375             /* Uh-oh, it's time to launch a mystery UFO */
1376
1377             /* TODO: Play UFO sound */
1378
1379             if (rb->rand() % 2) {
1380                 ufo_speed = UFO_SPEED;
1381                 ufo_x = PLAYFIELD_X;
1382             } else {
1383                 ufo_speed = -UFO_SPEED;
1384                 ufo_x = LCD_WIDTH - PLAYFIELD_X - UFO_WIDTH;
1385             }
1386             ufo_state = S_ACTIVE;
1387             /* UFO will be drawn next frame */
1388         }
1389         break;
1390
1391     case S_ACTIVE:
1392         /* Erase old pos */
1393         rb->lcd_fillrect(ufo_x, UFO_Y, UFO_WIDTH, UFO_HEIGHT);
1394         /* Move */
1395         ufo_x += ufo_speed;
1396         /* Check bounds */
1397         if (ufo_x < PLAYFIELD_X || ufo_x > LCD_WIDTH - PLAYFIELD_X - UFO_WIDTH) {
1398             ufo_state = S_IDLE;
1399             break;
1400         }
1401         /* Draw new pos */
1402         rb->lcd_bitmap_part(invadrox, UFO_SRC_X, 0,
1403                             STRIDE, ufo_x, UFO_Y, UFO_WIDTH, UFO_HEIGHT);
1404         break;
1405
1406     case S_SHOWSCORE:
1407         counter++;
1408         if (counter == S_IDLE) {
1409             /* Erase mystery number */
1410             rb->lcd_fillrect(ufo_x, UFO_Y, 3 * NUMBERS_WIDTH + 2 * NUM_SPACING, FONT_HEIGHT);
1411             ufo_state = S_IDLE;
1412         }
1413         break;
1414
1415     default:
1416         /* Exploding */
1417         ufo_state++;
1418         if (ufo_state == S_IDLE) {
1419             /* Erase explosion */
1420             rb->lcd_fillrect(ufo_x, UFO_Y - 1, UFO_EXPLODE_WIDTH, UFO_EXPLODE_HEIGHT);
1421             ufo_state = S_SHOWSCORE;
1422             counter = S_EXPLODE * 4;
1423             /* Draw mystery_score, sleep, increase score and continue */
1424             mystery_score = 50 + (rb->rand() % 6) * 50;
1425             if (mystery_score < 100) {
1426                 draw_number(ufo_x, UFO_Y, mystery_score, 2);
1427             } else {
1428                 draw_number(ufo_x, UFO_Y, mystery_score, 3);
1429             }
1430             score += mystery_score;
1431             draw_score();
1432         }
1433         break;
1434     }
1435 }
1436
1437
1438 void draw_background(void)
1439 {
1440
1441 #if (LCD_WIDTH == 320) && (LCD_HEIGHT == 240)
1442     /* Erase background to black */
1443     rb->lcd_fillrect(PLAYFIELD_X, 0, PLAYFIELD_WIDTH, LCD_HEIGHT);
1444     /* Left and right bitmaps */
1445     rb->lcd_bitmap(invadrox_left, 0, 0, PLAYFIELD_X, LCD_HEIGHT);
1446     rb->lcd_bitmap(invadrox_right, LCD_WIDTH - PLAYFIELD_X, 0, PLAYFIELD_X, LCD_HEIGHT);
1447 #else
1448     rb->lcd_fillrect(0, 0, LCD_WIDTH, LCD_HEIGHT);
1449 #endif
1450
1451 #if ((LCD_WIDTH == 240) && (LCD_HEIGHT == 320)) || ((LCD_WIDTH == 176) && (LCD_HEIGHT == 220))
1452     rb->lcd_bitmap(invadrox_logo, 0, 0, LCD_WIDTH, SCORE_Y);
1453 #endif
1454
1455     rb->lcd_update();
1456 }
1457
1458
1459 void new_level(void)
1460 {
1461     int i;
1462
1463     draw_background();
1464     /* Give an extra life for each new level */
1465     if (lives < MAX_LIVES) {
1466         lives++;
1467     }
1468     draw_lives();
1469
1470     /* Score */
1471     rb->lcd_bitmap_part(invadrox, SCORE_SRC_X, SCORE_SRC_Y,
1472                         STRIDE, PLAYFIELD_X, SCORE_Y, SCORE_WIDTH, FONT_HEIGHT);
1473     /* Hi-score */
1474     rb->lcd_bitmap_part(invadrox, 0, SCORE_SRC_Y,
1475                         STRIDE, HISCORE_X, SCORE_Y,
1476                         HISCORE_WIDTH, FONT_HEIGHT);
1477     draw_score();
1478     draw_number(HISCORENUM_X, SCORENUM_Y, hiscore.score, 4);
1479
1480     level++;
1481     draw_level();
1482     level_finished = false;
1483
1484     ufo_state = S_IDLE;
1485
1486     /* Init alien positions and states */
1487     for (i = 0; i < 4 * ALIENS; i++) {
1488         aliens[i].x = 0 + (i % ALIENS) * ((ALIEN_WIDTH + ALIEN_SPACING) / ALIEN_SPEED);
1489         aliens[i].y = 2 * (i / ALIENS);
1490         aliens[i].state = ALIVE;
1491     }
1492     /* Last row, bombers */
1493     for (i = 4 * ALIENS; i < 5 * ALIENS; i++) {
1494         aliens[i].x = 0 + (i % ALIENS) * ((ALIEN_WIDTH + ALIEN_SPACING) / ALIEN_SPEED);
1495         aliens[i].y = 2 * (i / ALIENS);
1496         aliens[i].state = BOMBER;
1497     }
1498
1499     /* Init bombs to inactive (S_IDLE) */
1500     for (i = 0; i < MAX_BOMBS; i++) {
1501         bombs[i].state = S_IDLE;
1502     }
1503
1504     /* Start aliens closer to earth from level 2 */
1505     for (i = 0; i < 5 * ALIENS; i++) {
1506         if (level < 6) {
1507             aliens[i].y += level - 1;
1508         } else {
1509             aliens[i].y += 5;
1510         }
1511     }
1512
1513     /* Max concurrent bombs */
1514     max_bombs = 1;
1515
1516     gamespeed = 2;
1517
1518     if (level > 1) {
1519         max_bombs++;
1520     }
1521
1522     /* Increase speed */
1523     if (level > 2) {
1524         gamespeed++;
1525     }
1526
1527     if (level > 3) {
1528         max_bombs++;
1529     }
1530
1531     /* Increase speed more */
1532     if (level > 4) {
1533         gamespeed++;
1534     }
1535
1536     if (level > 5) {
1537         max_bombs++;
1538     }
1539
1540     /* 4 shields */
1541     for (i = 1; i <= 4; i++) {
1542         rb->lcd_bitmap_part(invadrox, SHIELD_SRC_X, SHIELD_SRC_Y, STRIDE,
1543                             PLAYFIELD_X + i * PLAYFIELD_WIDTH / 5 - SHIELD_WIDTH / 2,
1544                             SHIELD_Y, SHIELD_WIDTH, SHIELD_HEIGHT);
1545     }
1546
1547     /* Bottom line */
1548     rb->lcd_set_foreground(SLIME_GREEN);
1549     rb->lcd_hline(PLAYFIELD_X, LCD_WIDTH - PLAYFIELD_X, PLAYFIELD_Y);
1550     /* Restore foreground to black (for fast erase later). */
1551     rb->lcd_set_foreground(LCD_BLACK);
1552
1553     ship_x = PLAYFIELD_X + 2 * LIVES_X;
1554     if (level == 1) {
1555         old_ship_x = ship_x;
1556     }
1557     ship_dir = 0;
1558     ship_acc = 0;
1559     ship_frame = 0;
1560     ship_hit = false;
1561     fire = S_IDLE;
1562     /* Start moving the bottom row left to right */
1563     curr_alien = 4 * ALIENS;
1564     aliens_paralyzed = 0;
1565     aliens_right = true;
1566     aliens_down = false;
1567     hit_left_border = false;
1568     hit_right_border = false;
1569     /* TODO: Change max_ship_speed to 3 at higher levels */
1570     max_ship_speed = 2;
1571
1572     draw_aliens();
1573
1574     rb->lcd_update();
1575 }
1576
1577
1578 void init_invadrox(void)
1579 {
1580     int i;
1581
1582     /* Seed random number generator with a "random" number */
1583     rb->srand(rb->get_time()->tm_sec + rb->get_time()->tm_min * 60);
1584
1585     /* Precalculate start of each scanline */
1586     for (i = 0; i < LCD_HEIGHT; i++) {
1587 #if (LCD_DEPTH >= 8)
1588         ytab[i] = i * LCD_WIDTH;
1589 #elif (LCD_DEPTH == 2) && (LCD_PIXELFORMAT == HORIZONTAL_PACKING)
1590         ytab[i] = i * (LCD_WIDTH / 4);
1591 #elif (LCD_DEPTH == 2) && (LCD_PIXELFORMAT == VERTICAL_PACKING)
1592         ytab[i] = (i / 4) * LCD_WIDTH;
1593 #else
1594         #error pixelformat not implemented yet
1595 #endif
1596     }
1597
1598     rb->lcd_set_background(LCD_BLACK);
1599     rb->lcd_set_foreground(LCD_BLACK);
1600
1601     if (highscore_load(HISCOREFILE, &hiscore, 1) < 0) {
1602         /* Init hiscore to 0 */
1603         rb->strncpy(hiscore.name, "Invader", sizeof(hiscore.name));
1604         hiscore.score = 0;
1605         hiscore.level = 1;
1606     }
1607
1608     /* Init alien types in aliens array */
1609     for (i = 0; i < 1 * ALIENS; i++) {
1610         aliens[i].type = 0; /* Kang */
1611     }
1612     for (; i < 3 * ALIENS; i++) {
1613         aliens[i].type = 1; /* Kodos */
1614     }
1615     for (; i < 5 * ALIENS; i++) {
1616         aliens[i].type = 2; /* Serak */
1617     }
1618
1619
1620     /* Save screen white color */
1621     rb->lcd_set_foreground(LCD_WHITE);
1622     rb->lcd_drawpixel(0, 0);
1623     rb->lcd_update_rect(0, 0, 1, 1);
1624     screen_white = get_pixel(0, 0);
1625
1626     /* Save screen green color */
1627     rb->lcd_set_foreground(SLIME_GREEN);
1628     rb->lcd_drawpixel(0, 0);
1629     rb->lcd_update_rect(0, 0, 1, 1);
1630     screen_green = get_pixel(0, 0);
1631
1632     /* Restore black foreground */
1633     rb->lcd_set_foreground(LCD_BLACK);
1634
1635     new_level();
1636
1637     /* Flash score at start */
1638     for (i = 0; i < 5; i++) {
1639         rb->lcd_fillrect(SCORENUM_X, SCORENUM_Y,
1640                          4 * NUMBERS_WIDTH + 3 * NUM_SPACING,
1641                          FONT_HEIGHT);
1642         rb->lcd_update_rect(SCORENUM_X, SCORENUM_Y,
1643                             4 * NUMBERS_WIDTH + 3 * NUM_SPACING,
1644                             FONT_HEIGHT);
1645         rb->sleep(HZ / 10);
1646         draw_number(SCORENUM_X, SCORENUM_Y, score, 4);
1647         rb->sleep(HZ / 10);
1648     }
1649 }
1650
1651
1652 inline bool handle_buttons(void)
1653 {
1654     static unsigned int oldbuttonstate = 0;
1655
1656     unsigned int released, pressed, newbuttonstate;
1657
1658     if (ship_hit) {
1659         /* Don't allow ship movement during explosion */
1660         newbuttonstate = 0;
1661     } else {
1662         newbuttonstate = rb->button_status();
1663     }
1664     if(newbuttonstate == oldbuttonstate) {
1665         if (newbuttonstate == 0) {
1666             /* No button pressed. Stop ship. */
1667             ship_acc = 0;
1668             if (ship_dir > 0) {
1669                 ship_dir--;
1670             }
1671             if (ship_dir < 0) {
1672                 ship_dir++;
1673             }
1674         }
1675         /* return false; */
1676         goto check_usb;
1677     }
1678     released = ~newbuttonstate & oldbuttonstate;
1679     pressed = newbuttonstate & ~oldbuttonstate;
1680     oldbuttonstate = newbuttonstate;
1681     if (pressed) {
1682         if (pressed & LEFT) {
1683             if (ship_acc > -1) {
1684                 ship_acc--;
1685             }
1686         }
1687         if (pressed & RIGHT) {
1688             if (ship_acc < 1) {
1689                 ship_acc++;
1690             }
1691         }
1692         if (pressed & FIRE) {
1693             if (fire == S_IDLE) {
1694                 /* Fire shot */
1695                 fire_x = ship_x + SHIP_WIDTH / 2;
1696                 fire_y = SHIP_Y - SHOT_HEIGHT;
1697                 fire = S_ACTIVE;
1698                 /* TODO: play fire sound */
1699             }
1700         }
1701 #ifdef RC_QUIT
1702         if (pressed & RC_QUIT) {
1703             rb->splash(HZ * 1, "Quit");
1704             return true;
1705         }
1706 #endif
1707         if (pressed & QUIT) {
1708             rb->splash(HZ * 1, "Quit");
1709             return true;
1710         }
1711     }
1712     if (released) {
1713         if ((released & LEFT)) {
1714             if (ship_acc < 1) {
1715                 ship_acc++;
1716             }
1717         }
1718         if ((released & RIGHT)) {
1719             if (ship_acc > -1) {
1720                 ship_acc--;
1721             }
1722         }
1723     }
1724
1725 check_usb:
1726
1727     /* Quit if USB is connected */
1728     if (rb->button_get(false) == SYS_USB_CONNECTED) {
1729         return true;
1730     }
1731
1732     return false;
1733 }
1734
1735
1736 void game_loop(void)
1737 {
1738     int i, end;
1739
1740     /* Print dimensions (just for debugging) */
1741     DBG("%03dx%03dx%02d\n", LCD_WIDTH, LCD_HEIGHT, LCD_DEPTH);
1742
1743     /* Init */
1744     init_invadrox();
1745
1746     while (1) {
1747         /* Convert CYCLETIME (in ms) to HZ */
1748         end = *rb->current_tick + (CYCLETIME * HZ) / 1000;
1749
1750         if (handle_buttons()) {
1751             return;
1752         }
1753
1754         /* Animate */
1755         move_ship();
1756         move_fire();
1757
1758         /* Check if level is finished (marked by move_fire) */
1759         if (level_finished) {
1760             /* TODO: Play level finished sound */
1761             new_level();
1762         }
1763
1764         move_ufo();
1765
1766         /* Move aliens */
1767         if (!aliens_paralyzed && !ship_hit) {
1768             for (i = 0; i < gamespeed; i++) {
1769                 if (!move_aliens()) {
1770                     if (game_over) {
1771                         return;
1772                     }
1773                 }
1774             }
1775         }
1776
1777         /* Move alien bombs */
1778         move_bombs();
1779         if (game_over) {
1780             return;
1781         }
1782
1783         /* Update "playfield" rect */
1784         rb->lcd_update_rect(PLAYFIELD_X, SCORENUM_Y + FONT_HEIGHT,
1785                             PLAYFIELD_WIDTH,
1786                             PLAYFIELD_Y + 1 - SCORENUM_Y - FONT_HEIGHT);
1787
1788         /* Wait until next frame */
1789         DBG("%ld (%d)\n", end - *rb->current_tick, (CYCLETIME * HZ) / 1000);
1790         if (end > *rb->current_tick) {
1791             rb->sleep(end - *rb->current_tick);
1792         } else {
1793             rb->yield();
1794         }
1795
1796     } /* end while */
1797 }
1798
1799
1800 /* this is the plugin entry point */
1801 enum plugin_status plugin_start(UNUSED const void* parameter)
1802 {
1803     rb->lcd_setfont(FONT_SYSFIXED);
1804     /* Turn off backlight timeout */
1805     backlight_force_on(); /* backlight control in lib/helper.c */
1806
1807     /* now go ahead and have fun! */
1808     game_loop();
1809
1810     /* Game Over. */
1811     /* TODO: Play game over sound */
1812     rb->splash(HZ * 2, "Game Over");
1813     if (score > hiscore.score) {
1814         /* Save new hiscore */
1815         hiscore.score = score;
1816         hiscore.level = level;
1817         highscore_save(HISCOREFILE, &hiscore, 1);
1818     }
1819
1820     /* Restore user's original backlight setting */
1821     rb->lcd_setfont(FONT_UI);
1822     /* Turn on backlight timeout (revert to settings) */
1823     backlight_use_settings(); /* backlight control in lib/helper.c */
1824
1825     return PLUGIN_OK;
1826 }
1827
1828
1829
1830 /**
1831  * GNU Emacs settings: Kernighan & Richie coding style with
1832  *                     4 spaces indent and no tabs.
1833  * Local Variables:
1834  *  c-file-style: "k&r"
1835  *  c-basic-offset: 4
1836  *  indent-tabs-mode: nil
1837  * End:
1838  */