+#if 0
+ printf("::: prefix == %d, gamemode == %d, level == %d, music == %d\n",
+ prefix, gamemode, level, music);
+#endif
+
+ if (prefix < 0 || prefix >= NUM_MUSIC_PREFIXES)
+ continue;
+
+ if (gamemode < 0)
+ gamemode = GAME_MODE_DEFAULT;
+
+ /* level specific music only allowed for in-game music */
+ if (level != -1 && gamemode == GAME_MODE_DEFAULT)
+ gamemode = GAME_MODE_PLAYING;
+
+ if (level == -1)
+ {
+ level = 0;
+ default_levelset_music = music;
+ }
+
+ if (gamemode == GAME_MODE_PLAYING || gamemode == GAME_MODE_DEFAULT)
+ levelset.music[level] = music;
+ if (gamemode != GAME_MODE_PLAYING)
+ menu.music[gamemode] = music;
+ }
+
+ /* now set all '-1' values to menu specific default values */
+ /* (undefined values of "levelset.music[]" might stay at "-1" to
+ allow dynamic selection of music files from music directory!) */
+ for (i = 0; i < MAX_LEVELS; i++)
+ if (levelset.music[i] == -1)
+ levelset.music[i] = default_levelset_music;
+ for (i = 0; i < NUM_SPECIAL_GFX_ARGS; i++)
+ if (menu.music[i] == -1)
+ menu.music[i] = menu.music[GAME_MODE_DEFAULT];
+
+#if 0
+ for (i = 0; i < MAX_LEVELS; i++)
+ if (levelset.music[i] != -1)
+ printf("::: levelset.music[%d] == %d\n", i, levelset.music[i]);
+ for (i = 0; i < NUM_SPECIAL_GFX_ARGS; i++)
+ if (menu.music[i] != -1)
+ printf("::: menu.music[%d] == %d\n", i, menu.music[i]);
+#endif
+}
+
+static void set_music_parameters(int music, char **parameter_raw)
+{
+ int parameter[NUM_MUS_ARGS];
+ int i;
+
+ /* get integer values from string parameters */
+ for (i = 0; i < NUM_MUS_ARGS; i++)
+ parameter[i] =
+ get_parameter_value(parameter_raw[i],
+ music_config_suffix[i].token,
+ music_config_suffix[i].type);
+
+ /* explicit loop mode setting in configuration overrides default value */
+ if (parameter[MUS_ARG_MODE_LOOP] != ARG_UNDEFINED_VALUE)
+ music_info[music].loop = parameter[MUS_ARG_MODE_LOOP];
+}
+
+static void InitMusicInfo()
+{
+ int num_music = getMusicListSize();
+ int i, j;
+
+ checked_free(music_info);
+
+ music_info = checked_calloc(num_music * sizeof(struct MusicInfo));
+
+ for (i = 0; i < num_music; i++)
+ {
+ struct FileInfo *music = getMusicListEntry(i);
+ int len_music_text = strlen(music->token);
+
+ music_info[i].loop = TRUE; /* default: play music in loop mode */
+
+ /* determine all loop music */
+
+ for (j = 0; music_prefix_info[j].prefix; j++)
+ {
+ int len_prefix_text = strlen(music_prefix_info[j].prefix);
+
+ if (len_prefix_text < len_music_text &&
+ strncmp(music->token,
+ music_prefix_info[j].prefix, len_prefix_text) == 0)
+ {
+ music_info[i].loop = music_prefix_info[j].is_loop_music;
+
+ break;
+ }
+ }
+
+ set_music_parameters(i, music->parameter);
+ }
+}
+
+static void ReinitializeGraphics()
+{
+ InitGraphicInfo(); /* graphic properties mapping */
+ InitElementGraphicInfo(); /* element game graphic mapping */
+ InitElementSpecialGraphicInfo(); /* element special graphic mapping */
+
+ InitElementSmallImages(); /* scale elements to all needed sizes */
+ InitScaledImages(); /* scale all other images, if needed */
+ InitFontGraphicInfo(); /* initialize text drawing functions */
+
+ InitGraphicInfo_EM(); /* graphic mapping for EM engine */
+
+ SetMainBackgroundImage(IMG_BACKGROUND);
+ SetDoorBackgroundImage(IMG_BACKGROUND_DOOR);
+
+ InitGadgets();
+ InitToons();
+}
+
+static void ReinitializeSounds()
+{
+ InitSoundInfo(); /* sound properties mapping */
+ InitElementSoundInfo(); /* element game sound mapping */
+ InitGameModeSoundInfo(); /* game mode sound mapping */
+
+ InitPlayLevelSound(); /* internal game sound settings */
+}
+
+static void ReinitializeMusic()
+{
+ InitMusicInfo(); /* music properties mapping */
+ InitGameModeMusicInfo(); /* game mode music mapping */
+}
+
+static int get_special_property_bit(int element, int property_bit_nr)
+{
+ struct PropertyBitInfo
+ {
+ int element;
+ int bit_nr;
+ };
+
+ static struct PropertyBitInfo pb_can_move_into_acid[] =
+ {
+ /* the player may be able fall into acid when gravity is activated */
+ { EL_PLAYER_1, 0 },
+ { EL_PLAYER_2, 0 },
+ { EL_PLAYER_3, 0 },
+ { EL_PLAYER_4, 0 },
+ { EL_SP_MURPHY, 0 },
+ { EL_SOKOBAN_FIELD_PLAYER, 0 },
+
+ /* all elements that can move may be able to also move into acid */
+ { EL_BUG, 1 },
+ { EL_BUG_LEFT, 1 },
+ { EL_BUG_RIGHT, 1 },
+ { EL_BUG_UP, 1 },
+ { EL_BUG_DOWN, 1 },
+ { EL_SPACESHIP, 2 },
+ { EL_SPACESHIP_LEFT, 2 },
+ { EL_SPACESHIP_RIGHT, 2 },
+ { EL_SPACESHIP_UP, 2 },
+ { EL_SPACESHIP_DOWN, 2 },
+ { EL_BD_BUTTERFLY, 3 },
+ { EL_BD_BUTTERFLY_LEFT, 3 },
+ { EL_BD_BUTTERFLY_RIGHT, 3 },
+ { EL_BD_BUTTERFLY_UP, 3 },
+ { EL_BD_BUTTERFLY_DOWN, 3 },
+ { EL_BD_FIREFLY, 4 },
+ { EL_BD_FIREFLY_LEFT, 4 },
+ { EL_BD_FIREFLY_RIGHT, 4 },
+ { EL_BD_FIREFLY_UP, 4 },
+ { EL_BD_FIREFLY_DOWN, 4 },
+ { EL_YAMYAM, 5 },
+ { EL_YAMYAM_LEFT, 5 },
+ { EL_YAMYAM_RIGHT, 5 },
+ { EL_YAMYAM_UP, 5 },
+ { EL_YAMYAM_DOWN, 5 },
+ { EL_DARK_YAMYAM, 6 },
+ { EL_ROBOT, 7 },
+ { EL_PACMAN, 8 },
+ { EL_PACMAN_LEFT, 8 },
+ { EL_PACMAN_RIGHT, 8 },
+ { EL_PACMAN_UP, 8 },
+ { EL_PACMAN_DOWN, 8 },
+ { EL_MOLE, 9 },
+ { EL_MOLE_LEFT, 9 },
+ { EL_MOLE_RIGHT, 9 },
+ { EL_MOLE_UP, 9 },
+ { EL_MOLE_DOWN, 9 },
+ { EL_PENGUIN, 10 },
+ { EL_PIG, 11 },
+ { EL_DRAGON, 12 },
+ { EL_SATELLITE, 13 },
+ { EL_SP_SNIKSNAK, 14 },
+ { EL_SP_ELECTRON, 15 },
+ { EL_BALLOON, 16 },
+ { EL_SPRING, 17 },
+ { EL_EMC_ANDROID, 18 },
+
+ { -1, -1 },
+ };
+
+ static struct PropertyBitInfo pb_dont_collide_with[] =
+ {
+ { EL_SP_SNIKSNAK, 0 },
+ { EL_SP_ELECTRON, 1 },
+
+ { -1, -1 },
+ };
+
+ static struct
+ {
+ int bit_nr;
+ struct PropertyBitInfo *pb_info;
+ } pb_definition[] =
+ {
+ { EP_CAN_MOVE_INTO_ACID, pb_can_move_into_acid },
+ { EP_DONT_COLLIDE_WITH, pb_dont_collide_with },
+
+ { -1, NULL },
+ };
+
+ struct PropertyBitInfo *pb_info = NULL;
+ int i;
+
+ for (i = 0; pb_definition[i].bit_nr != -1; i++)
+ if (pb_definition[i].bit_nr == property_bit_nr)
+ pb_info = pb_definition[i].pb_info;
+
+ if (pb_info == NULL)
+ return -1;
+
+ for (i = 0; pb_info[i].element != -1; i++)
+ if (pb_info[i].element == element)
+ return pb_info[i].bit_nr;
+
+ return -1;
+}
+
+void setBitfieldProperty(int *bitfield, int property_bit_nr, int element,
+ boolean property_value)
+{
+ int bit_nr = get_special_property_bit(element, property_bit_nr);
+
+ if (bit_nr > -1)
+ {
+ if (property_value)
+ *bitfield |= (1 << bit_nr);
+ else
+ *bitfield &= ~(1 << bit_nr);
+ }
+}
+
+boolean getBitfieldProperty(int *bitfield, int property_bit_nr, int element)
+{
+ int bit_nr = get_special_property_bit(element, property_bit_nr);
+
+ if (bit_nr > -1)
+ return ((*bitfield & (1 << bit_nr)) != 0);
+
+ return FALSE;
+}
+
+static void resolve_group_element(int group_element, int recursion_depth)
+{
+ static int group_nr;
+ static struct ElementGroupInfo *group;
+ struct ElementGroupInfo *actual_group = element_info[group_element].group;
+ int i;
+
+ if (actual_group == NULL) /* not yet initialized */
+ return;
+
+ if (recursion_depth > NUM_GROUP_ELEMENTS) /* recursion too deep */
+ {
+ Error(ERR_WARN, "recursion too deep when resolving group element %d",
+ group_element - EL_GROUP_START + 1);