added xrick game

original xrick code by 'BigOrno' at:
http://www.bigorno.net/xrick/

Rockbox port, plus bugfixes at:
https://github.com/pierluigi-vicinanza/xrick

Further changes:

 * Additonal fixes from g#3026
 * Port to modern plugin API
 * Add Pluginlib keymap fallback
 * Support all >1bpp screens
 * Fix build warnings in miniz
 * Better error message when resources are missing

Change-Id: Id83928bc2539901b0221692f65cbca41389c58e7

apps/plugins/xrick/game.h

@@ -0,0 +1,73 @@
+/*
+ * xrick/game.h
+ *
+ * Copyright (C) 1998-2002 BigOrno (bigorno@bigorno.net).
+ * Copyright (C) 2008-2014 Pierluigi Vicinanza.
+ * All rights reserved.
+ *
+ * The use and distribution terms for this software are contained in the file
+ * named README, which can be found in the root of this distribution. By
+ * using this software in any fashion, you are agreeing to be bound by the
+ * terms of this license.
+ *
+ * You must not remove this notice, or any other, from this software.
+ */
+
+#ifndef _GAME_H
+#define _GAME_H
+
+#include "xrick/config.h"
+#include "xrick/rects.h"
+#ifdef ENABLE_SOUND
+#include "xrick/data/sounds.h"
+#endif
+
+#include <stddef.h> /* NULL */
+
+#define LEFT 1
+#define RIGHT 0
+
+#define GAME_PERIOD 40
+
+#define GAME_BOMBS_INIT 6
+#define GAME_BULLETS_INIT 6
+
+extern U8 game_lives;      /* lives counter */
+extern U8 game_bombs;      /* bombs counter */
+extern U8 game_bullets;    /* bullets counter */
+
+extern U32 game_score;     /* score */
+
+extern U16 game_map;       /* current map */
+extern U16 game_submap;    /* current submap */
+
+extern U8 game_dir;        /* direction (LEFT, RIGHT) */
+extern bool game_chsm;       /* change submap request (true, false) */
+
+extern bool game_waitevt;    /* wait for events (true, false) */
+extern U8 game_period;     /* time between each frame, in millisecond */
+
+extern const rect_t *game_rects; /* rectangles to redraw at each frame */
+
+extern void game_run(void);
+#ifdef ENABLE_SOUND
+extern void game_setmusic(sound_t * sound, S8 loop);
+extern void game_stopmusic(void);
+#endif /* ENABLE_SOUND */
+
+#ifdef ENABLE_CHEATS
+typedef enum
+{
+    Cheat_UNLIMITED_ALL,
+    Cheat_NEVER_DIE,
+    Cheat_EXPOSE
+} cheat_t;
+extern bool game_cheat1;     /* infinite lives, bombs and bullets */
+extern bool game_cheat2;     /* never die */
+extern bool game_cheat3;     /* highlight sprites */
+extern void game_toggleCheat(cheat_t);
+#endif /* ENABLE_CHEATS */
+
+#endif /* ndef _GAME_H */
+
+/* eof */