+ if (use_empty_level)
+ {
+ setLevelInfoToDefaults(level);
+
+ level->fieldx = SP_LEVEL_XSIZE;
+ level->fieldy = SP_LEVEL_YSIZE;
+
+ for (y = 0; y < SP_LEVEL_YSIZE; y++)
+ for (x = 0; x < SP_LEVEL_XSIZE; x++)
+ level->field[x][y] = EL_EMPTY;
+
+ strcpy(level->name, "-------- EMPTY --------");
+
+ Error(ERR_WARN, "single part of multi-part level -- using empty level");
+ }
+
+ if (reading_multipart_level)
+ *level = multipart_level;
+}
+
+/* ------------------------------------------------------------------------- */
+/* functions for loading generic level */
+/* ------------------------------------------------------------------------- */
+
+void LoadLevelFromFileInfo(struct LevelInfo *level,
+ struct LevelFileInfo *level_file_info)
+{
+ /* always start with reliable default values */
+ setLevelInfoToDefaults(level);
+
+ switch (level_file_info->type)
+ {
+ case LEVEL_FILE_TYPE_RND:
+ LoadLevelFromFileInfo_RND(level, level_file_info);
+ break;
+
+ case LEVEL_FILE_TYPE_EM:
+ LoadLevelFromFileInfo_EM(level, level_file_info);
+ level->game_engine_type = GAME_ENGINE_TYPE_EM;
+ break;
+
+ case LEVEL_FILE_TYPE_SP:
+ LoadLevelFromFileInfo_SP(level, level_file_info);
+ break;
+
+ default:
+ LoadLevelFromFileInfo_RND(level, level_file_info);
+ break;
+ }
+
+ /* if level file is invalid, restore level structure to default values */
+ if (level->no_valid_file)
+ setLevelInfoToDefaults(level);
+
+ if (level->game_engine_type == GAME_ENGINE_TYPE_UNKNOWN)
+ level->game_engine_type = GAME_ENGINE_TYPE_RND;
+
+ if (level_file_info->type == LEVEL_FILE_TYPE_RND)
+ CopyNativeLevel_RND_to_Native(level);
+ else
+ CopyNativeLevel_Native_to_RND(level);
+}
+
+void LoadLevelFromFilename(struct LevelInfo *level, char *filename)
+{
+ static struct LevelFileInfo level_file_info;
+
+ /* always start with reliable default values */
+ setFileInfoToDefaults(&level_file_info);
+
+ level_file_info.nr = 0; /* unknown level number */
+ level_file_info.type = LEVEL_FILE_TYPE_RND; /* no others supported yet */
+ level_file_info.filename = filename;
+
+ LoadLevelFromFileInfo(level, &level_file_info);
+}
+
+static void LoadLevel_InitVersion(struct LevelInfo *level, char *filename)
+{
+ if (leveldir_current == NULL) /* only when dumping level */
+ return;
+
+#if 0
+ printf("::: sort_priority: %d\n", leveldir_current->sort_priority);
+#endif
+
+ /* determine correct game engine version of current level */
+ if (!leveldir_current->latest_engine)
+ {
+ /* For all levels which are not forced to use the latest game engine
+ version (normally user contributed, private and undefined levels),
+ use the version of the game engine the levels were created for.
+
+ Since 2.0.1, the game engine version is now directly stored
+ in the level file (chunk "VERS"), so there is no need anymore
+ to set the game version from the file version (except for old,
+ pre-2.0 levels, where the game version is still taken from the
+ file format version used to store the level -- see above). */
+
+ /* player was faster than enemies in 1.0.0 and before */
+ if (level->file_version == FILE_VERSION_1_0)
+ level->double_speed = TRUE;
+
+ /* default behaviour for EM style gems was "slippery" only in 2.0.1 */
+ if (level->game_version == VERSION_IDENT(2,0,1,0))
+ level->em_slippery_gems = TRUE;
+
+ /* springs could be pushed over pits before (pre-release version) 2.2.0 */
+ if (level->game_version < VERSION_IDENT(2,2,0,0))
+ level->use_spring_bug = TRUE;
+
+ /* only few elements were able to actively move into acid before 3.1.0 */
+ /* trigger settings did not exist before 3.1.0; set to default "any" */
+ if (level->game_version < VERSION_IDENT(3,1,0,0))
+ {
+ int i, j;
+
+ /* correct "can move into acid" settings (all zero in old levels) */
+
+ level->can_move_into_acid_bits = 0; /* nothing can move into acid */
+ level->dont_collide_with_bits = 0; /* nothing is deadly when colliding */
+
+ setMoveIntoAcidProperty(level, EL_ROBOT, TRUE);
+ setMoveIntoAcidProperty(level, EL_SATELLITE, TRUE);
+ setMoveIntoAcidProperty(level, EL_PENGUIN, TRUE);
+ setMoveIntoAcidProperty(level, EL_BALLOON, TRUE);
+
+ for (i = 0; i < NUM_CUSTOM_ELEMENTS; i++)
+ SET_PROPERTY(EL_CUSTOM_START + i, EP_CAN_MOVE_INTO_ACID, TRUE);
+
+ /* correct trigger settings (stored as zero == "none" in old levels) */
+
+ for (i = 0; i < NUM_CUSTOM_ELEMENTS; i++)
+ {
+ int element = EL_CUSTOM_START + i;
+ struct ElementInfo *ei = &element_info[element];
+
+ for (j = 0; j < ei->num_change_pages; j++)
+ {
+ struct ElementChangeInfo *change = &ei->change_page[j];
+
+ change->trigger_player = CH_PLAYER_ANY;
+ change->trigger_page = CH_PAGE_ANY;
+ }
+ }
+ }
+ }
+ else /* always use the latest game engine version */
+ {
+ /* For all levels which are forced to use the latest game engine version
+ (normally all but user contributed, private and undefined levels), set
+ the game engine version to the actual version; this allows for actual
+ corrections in the game engine to take effect for existing, converted
+ levels (from "classic" or other existing games) to make the emulation
+ of the corresponding game more accurate, while (hopefully) not breaking
+ existing levels created from other players. */
+
+ level->game_version = GAME_VERSION_ACTUAL;
+
+ /* Set special EM style gems behaviour: EM style gems slip down from
+ normal, steel and growing wall. As this is a more fundamental change,
+ it seems better to set the default behaviour to "off" (as it is more
+ natural) and make it configurable in the level editor (as a property
+ of gem style elements). Already existing converted levels (neither
+ private nor contributed levels) are changed to the new behaviour. */
+
+ if (level->file_version < FILE_VERSION_2_0)
+ level->em_slippery_gems = TRUE;
+ }
+}
+
+static void LoadLevel_InitElements(struct LevelInfo *level, char *filename)
+{
+ int i, j, x, y;
+
+ /* map custom element change events that have changed in newer versions
+ (these following values were accidentally changed in version 3.0.1)
+ (this seems to be needed only for 'ab_levelset3' and 'ab_levelset4') */
+ if (level->game_version <= VERSION_IDENT(3,0,0,0))
+ {
+ for (i = 0; i < NUM_CUSTOM_ELEMENTS; i++)
+ {
+ int element = EL_CUSTOM_START + i;
+
+ /* order of checking and copying events to be mapped is important */
+ for (j = CE_BY_OTHER_ACTION; j >= CE_COUNT_AT_ZERO; j--)
+ {
+ if (HAS_CHANGE_EVENT(element, j - 2))
+ {
+ SET_CHANGE_EVENT(element, j - 2, FALSE);
+ SET_CHANGE_EVENT(element, j, TRUE);
+ }
+ }
+
+ /* order of checking and copying events to be mapped is important */
+ for (j = CE_PLAYER_COLLECTS_X; j >= CE_HITTING_SOMETHING; j--)
+ {
+ if (HAS_CHANGE_EVENT(element, j - 1))
+ {
+ SET_CHANGE_EVENT(element, j - 1, FALSE);
+ SET_CHANGE_EVENT(element, j, TRUE);
+ }
+ }
+ }
+ }
+
+ /* initialize "can_change" field for old levels with only one change page */
+ if (level->game_version <= VERSION_IDENT(3,0,2,0))
+ {
+ for (i = 0; i < NUM_CUSTOM_ELEMENTS; i++)
+ {
+ int element = EL_CUSTOM_START + i;
+
+ if (CAN_CHANGE(element))
+ element_info[element].change->can_change = TRUE;
+ }
+ }
+
+ /* correct custom element values (for old levels without these options) */
+ if (level->game_version < VERSION_IDENT(3,1,1,0))
+ {
+ for (i = 0; i < NUM_CUSTOM_ELEMENTS; i++)
+ {
+ int element = EL_CUSTOM_START + i;
+ struct ElementInfo *ei = &element_info[element];
+
+ if (ei->access_direction == MV_NO_MOVING)
+ ei->access_direction = MV_ALL_DIRECTIONS;
+
+ for (j = 0; j < ei->num_change_pages; j++)
+ {
+ struct ElementChangeInfo *change = &ei->change_page[j];
+
+ if (change->trigger_side == CH_SIDE_NONE)
+ change->trigger_side = CH_SIDE_ANY;
+ }
+ }
+ }
+
+ /* initialize "can_explode" field for old levels which did not store this */
+ /* !!! CHECK THIS -- "<= 3,1,0,0" IS PROBABLY WRONG !!! */
+ if (level->game_version <= VERSION_IDENT(3,1,0,0))
+ {
+ for (i = 0; i < NUM_CUSTOM_ELEMENTS; i++)
+ {
+ int element = EL_CUSTOM_START + i;
+
+ if (EXPLODES_1X1_OLD(element))
+ element_info[element].explosion_type = EXPLODES_1X1;
+
+ SET_PROPERTY(element, EP_CAN_EXPLODE, (EXPLODES_BY_FIRE(element) ||
+ EXPLODES_SMASHED(element) ||
+ EXPLODES_IMPACT(element)));
+ }
+ }
+
+ /* correct previously hard-coded move delay values for maze runner style */
+ if (level->game_version < VERSION_IDENT(3,1,1,0))
+ {
+ for (i = 0; i < NUM_CUSTOM_ELEMENTS; i++)
+ {
+ int element = EL_CUSTOM_START + i;
+
+ if (element_info[element].move_pattern & MV_MAZE_RUNNER_STYLE)
+ {
+ /* previously hard-coded and therefore ignored */
+ element_info[element].move_delay_fixed = 9;
+ element_info[element].move_delay_random = 0;
+ }
+ }
+ }
+
+ /* map elements that have changed in newer versions */
+ level->amoeba_content = getMappedElementByVersion(level->amoeba_content,
+ level->game_version);
+ for (i = 0; i < MAX_ELEMENT_CONTENTS; i++)
+ for (x = 0; x < 3; x++)
+ for (y = 0; y < 3; y++)
+ level->yamyam_content[i][x][y] =
+ getMappedElementByVersion(level->yamyam_content[i][x][y],
+ level->game_version);
+
+ /* initialize element properties for level editor etc. */
+ InitElementPropertiesEngine(level->game_version);
+}
+
+static void LoadLevel_InitPlayfield(struct LevelInfo *level, char *filename)
+{
+ int x, y;
+
+ /* map elements that have changed in newer versions */
+ for (y = 0; y < level->fieldy; y++)
+ for (x = 0; x < level->fieldx; x++)
+ level->field[x][y] = getMappedElementByVersion(level->field[x][y],
+ level->game_version);
+
+ /* copy elements to runtime playfield array */
+ for (x = 0; x < MAX_LEV_FIELDX; x++)
+ for (y = 0; y < MAX_LEV_FIELDY; y++)
+ Feld[x][y] = level->field[x][y];
+
+ /* initialize level size variables for faster access */
+ lev_fieldx = level->fieldx;
+ lev_fieldy = level->fieldy;
+
+ /* determine border element for this level */
+ SetBorderElement();
+}
+
+void LoadLevelTemplate(int nr)
+{
+ char *filename;
+
+ setLevelFileInfo(&level_template.file_info, nr);
+ filename = level_template.file_info.filename;
+
+ LoadLevelFromFileInfo(&level_template, &level_template.file_info);
+
+ LoadLevel_InitVersion(&level_template, filename);
+ LoadLevel_InitElements(&level_template, filename);
+
+ ActivateLevelTemplate();
+}
+
+void LoadLevel(int nr)
+{
+ char *filename;
+
+ setLevelFileInfo(&level.file_info, nr);
+ filename = level.file_info.filename;
+
+ LoadLevelFromFileInfo(&level, &level.file_info);
+
+ if (level.use_custom_template)
+ LoadLevelTemplate(-1);
+
+ LoadLevel_InitVersion(&level, filename);
+ LoadLevel_InitElements(&level, filename);
+ LoadLevel_InitPlayfield(&level, filename);
+}
+
+static void SaveLevel_VERS(FILE *file, struct LevelInfo *level)
+{
+ putFileVersion(file, level->file_version);
+ putFileVersion(file, level->game_version);