+
+ for(j=0; j<MAX_ELEMENT_NAME_LEN; j++)
+ element_info[element].description[j] = getFile8Bit(file);
+ element_info[element].description[MAX_ELEMENT_NAME_LEN] = 0;
+
+ Properties[element][EP_BITFIELD_BASE] = getFile32BitBE(file);
+
+ /* some free bytes for future properties and padding */
+ ReadUnusedBytesFromFile(file, 7);
+
+ element_info[element].use_gfx_element = getFile8Bit(file);
+ element_info[element].gfx_element =
+ checkLevelElement(getFile16BitBE(file));
+
+ element_info[element].collect_score = getFile8Bit(file);
+ element_info[element].collect_count = getFile8Bit(file);
+
+ element_info[element].push_delay_fixed = getFile16BitBE(file);
+ element_info[element].push_delay_random = getFile16BitBE(file);
+ element_info[element].move_delay_fixed = getFile16BitBE(file);
+ element_info[element].move_delay_random = getFile16BitBE(file);
+
+ element_info[element].move_pattern = getFile16BitBE(file);
+ element_info[element].move_direction_initial = getFile8Bit(file);
+ element_info[element].move_stepsize = getFile8Bit(file);
+
+ for(y=0; y<3; y++)
+ for(x=0; x<3; x++)
+ element_info[element].content[x][y] =
+ checkLevelElement(getFile16BitBE(file));
+
+ element_info[element].change->events = getFile32BitBE(file);
+
+ element_info[element].change->target_element =
+ checkLevelElement(getFile16BitBE(file));
+
+ element_info[element].change->delay_fixed = getFile16BitBE(file);
+ element_info[element].change->delay_random = getFile16BitBE(file);
+ element_info[element].change->delay_frames = getFile16BitBE(file);
+
+ element_info[element].change->trigger_element =
+ checkLevelElement(getFile16BitBE(file));
+
+ element_info[element].change->explode = getFile8Bit(file);
+ element_info[element].change->use_content = getFile8Bit(file);
+ element_info[element].change->only_complete = getFile8Bit(file);
+ element_info[element].change->use_random_change = getFile8Bit(file);
+
+ element_info[element].change->random = getFile8Bit(file);
+ element_info[element].change->power = getFile8Bit(file);
+
+ for(y=0; y<3; y++)
+ for(x=0; x<3; x++)
+ element_info[element].change->content[x][y] =
+ checkLevelElement(getFile16BitBE(file));
+
+ element_info[element].slippery_type = getFile8Bit(file);
+
+ /* some free bytes for future properties and padding */
+ ReadUnusedBytesFromFile(file, LEVEL_CPART_CUS3_UNUSED);
+
+ /* mark that this custom element has been modified */
+ element_info[element].modified_settings = TRUE;
+ }
+
+ return chunk_size;
+}
+
+static int LoadLevel_CUS4(FILE *file, int chunk_size, struct LevelInfo *level)
+{
+ struct ElementInfo *ei;
+ int chunk_size_expected;
+ int element;
+ int i, x, y;
+
+ element = getFile16BitBE(file);
+
+ if (!IS_CUSTOM_ELEMENT(element))
+ {
+ Error(ERR_WARN, "invalid custom element number %d", element);
+
+ element = EL_DEFAULT; /* dummy element used for artwork config */
+ }
+
+ ei = &element_info[element];
+
+ for(i=0; i < MAX_ELEMENT_NAME_LEN; i++)
+ ei->description[i] = getFile8Bit(file);
+ ei->description[MAX_ELEMENT_NAME_LEN] = 0;
+
+ Properties[element][EP_BITFIELD_BASE] = getFile32BitBE(file);
+ ReadUnusedBytesFromFile(file, 4); /* reserved for more base properties */
+
+ ei->num_change_pages = getFile8Bit(file);
+
+ /* some free bytes for future base property values and padding */
+ ReadUnusedBytesFromFile(file, 5);
+
+ chunk_size_expected = LEVEL_CHUNK_CUS4_SIZE(ei->num_change_pages);
+ if (chunk_size_expected != chunk_size)
+ {
+ ReadUnusedBytesFromFile(file, chunk_size - 48);
+ return chunk_size_expected;
+ }
+
+ /* read custom property values */
+
+ ei->use_gfx_element = getFile8Bit(file);
+ ei->gfx_element = checkLevelElement(getFile16BitBE(file));
+
+ ei->collect_score = getFile8Bit(file);
+ ei->collect_count = getFile8Bit(file);
+
+ ei->push_delay_fixed = getFile16BitBE(file);
+ ei->push_delay_random = getFile16BitBE(file);
+ ei->move_delay_fixed = getFile16BitBE(file);
+ ei->move_delay_random = getFile16BitBE(file);
+
+ ei->move_pattern = getFile16BitBE(file);
+ ei->move_direction_initial = getFile8Bit(file);
+ ei->move_stepsize = getFile8Bit(file);
+
+ ei->slippery_type = getFile8Bit(file);
+
+ for(y=0; y<3; y++)
+ for(x=0; x<3; x++)
+ ei->content[x][y] = checkLevelElement(getFile16BitBE(file));
+
+ /* some free bytes for future custom property values and padding */
+ ReadUnusedBytesFromFile(file, 12);
+
+ /* read change property values */
+
+ setElementChangePages(ei, ei->num_change_pages);
+
+ for (i=0; i < ei->num_change_pages; i++)
+ {
+ struct ElementChangeInfo *change = &ei->change_page[i];
+
+ /* always start with reliable default values */
+ setElementChangeInfoToDefaults(change);
+
+ change->events = getFile32BitBE(file);
+
+ change->target_element = checkLevelElement(getFile16BitBE(file));
+
+ change->delay_fixed = getFile16BitBE(file);
+ change->delay_random = getFile16BitBE(file);
+ change->delay_frames = getFile16BitBE(file);
+
+ change->trigger_element = checkLevelElement(getFile16BitBE(file));
+
+ change->explode = getFile8Bit(file);
+ change->use_content = getFile8Bit(file);
+ change->only_complete = getFile8Bit(file);
+ change->use_random_change = getFile8Bit(file);
+
+ change->random = getFile8Bit(file);
+ change->power = getFile8Bit(file);
+
+ for(y=0; y<3; y++)
+ for(x=0; x<3; x++)
+ change->content[x][y] = checkLevelElement(getFile16BitBE(file));
+
+ change->can_change = getFile8Bit(file);
+
+ change->sides = getFile8Bit(file);
+
+ if (change->sides == CH_SIDE_NONE) /* correct empty sides field */
+ change->sides = CH_SIDE_ANY;
+
+ /* some free bytes for future change property values and padding */
+ ReadUnusedBytesFromFile(file, 8);
+ }
+
+ /* mark this custom element as modified */
+ ei->modified_settings = TRUE;
+
+ return chunk_size;
+}
+
+void LoadLevelFromFilename(struct LevelInfo *level, char *filename)
+{
+ char cookie[MAX_LINE_LEN];
+ char chunk_name[CHUNK_ID_LEN + 1];
+ int chunk_size;
+ FILE *file;
+
+ /* always start with reliable default values */
+ setLevelInfoToDefaults(level);
+
+ if (!(file = fopen(filename, MODE_READ)))
+ {
+ level->no_level_file = TRUE;
+
+ if (level != &level_template)
+ Error(ERR_WARN, "cannot read level '%s' - creating new level", filename);
+
+ return;
+ }
+
+ getFileChunkBE(file, chunk_name, NULL);
+ if (strcmp(chunk_name, "RND1") == 0)
+ {
+ getFile32BitBE(file); /* not used */
+
+ getFileChunkBE(file, chunk_name, NULL);
+ if (strcmp(chunk_name, "CAVE") != 0)
+ {
+ Error(ERR_WARN, "unknown format of level file '%s'", filename);
+ fclose(file);
+ return;
+ }
+ }
+ else /* check for pre-2.0 file format with cookie string */
+ {
+ strcpy(cookie, chunk_name);
+ fgets(&cookie[4], MAX_LINE_LEN - 4, file);
+ if (strlen(cookie) > 0 && cookie[strlen(cookie) - 1] == '\n')
+ cookie[strlen(cookie) - 1] = '\0';
+
+ if (!checkCookieString(cookie, LEVEL_COOKIE_TMPL))
+ {
+ Error(ERR_WARN, "unknown format of level file '%s'", filename);
+ fclose(file);
+ return;
+ }
+
+ if ((level->file_version = getFileVersionFromCookieString(cookie)) == -1)
+ {
+ Error(ERR_WARN, "unsupported version of level file '%s'", filename);
+ fclose(file);
+ return;
+ }
+
+ /* pre-2.0 level files have no game version, so use file version here */
+ level->game_version = level->file_version;
+ }
+
+ if (level->file_version < FILE_VERSION_1_2)
+ {
+ /* level files from versions before 1.2.0 without chunk structure */
+ LoadLevel_HEAD(file, LEVEL_HEADER_SIZE, level);
+ LoadLevel_BODY(file, level->fieldx * level->fieldy, level);
+ }
+ else
+ {
+ static struct
+ {
+ char *name;
+ int size;
+ int (*loader)(FILE *, int, struct LevelInfo *);
+ }
+ chunk_info[] =
+ {
+ { "VERS", FILE_VERS_CHUNK_SIZE, LoadLevel_VERS },
+ { "HEAD", LEVEL_HEADER_SIZE, LoadLevel_HEAD },
+ { "AUTH", MAX_LEVEL_AUTHOR_LEN, LoadLevel_AUTH },
+ { "BODY", -1, LoadLevel_BODY },
+ { "CONT", -1, LoadLevel_CONT },
+ { "CNT2", LEVEL_CHUNK_CNT2_SIZE, LoadLevel_CNT2 },
+ { "CNT3", -1, LoadLevel_CNT3 },
+ { "CUS1", -1, LoadLevel_CUS1 },
+ { "CUS2", -1, LoadLevel_CUS2 },
+ { "CUS3", -1, LoadLevel_CUS3 },
+ { "CUS4", -1, LoadLevel_CUS4 },
+ { NULL, 0, NULL }
+ };
+
+ while (getFileChunkBE(file, chunk_name, &chunk_size))
+ {
+ int i = 0;
+
+ while (chunk_info[i].name != NULL &&
+ strcmp(chunk_name, chunk_info[i].name) != 0)
+ i++;
+
+ if (chunk_info[i].name == NULL)
+ {
+ Error(ERR_WARN, "unknown chunk '%s' in level file '%s'",
+ chunk_name, filename);
+ ReadUnusedBytesFromFile(file, chunk_size);
+ }
+ else if (chunk_info[i].size != -1 &&
+ chunk_info[i].size != chunk_size)
+ {
+ Error(ERR_WARN, "wrong size (%d) of chunk '%s' in level file '%s'",
+ chunk_size, chunk_name, filename);
+ ReadUnusedBytesFromFile(file, chunk_size);
+ }
+ else
+ {
+ /* call function to load this level chunk */
+ int chunk_size_expected =
+ (chunk_info[i].loader)(file, chunk_size, level);
+
+ /* the size of some chunks cannot be checked before reading other
+ chunks first (like "HEAD" and "BODY") that contain some header
+ information, so check them here */
+ if (chunk_size_expected != chunk_size)
+ {
+ Error(ERR_WARN, "wrong size (%d) of chunk '%s' in level file '%s'",
+ chunk_size, chunk_name, filename);
+ }
+ }
+ }
+ }
+
+ fclose(file);
+}
+
+#if 1
+
+static void LoadLevel_InitVersion(struct LevelInfo *level, char *filename)
+{
+ if (leveldir_current == NULL) /* only when dumping level */
+ return;
+
+ /* determine correct game engine version of current level */
+ if (IS_LEVELCLASS_CONTRIBUTION(leveldir_current) ||
+ IS_LEVELCLASS_USER(leveldir_current))
+ {
+#if 0
+ printf("\n::: This level is private or contributed: '%s'\n", filename);
+#endif
+
+ /* For user contributed and private 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). */
+
+ /* do some special adjustments to support older level versions */
+ if (level->file_version == FILE_VERSION_1_0)
+ {
+ Error(ERR_WARN, "level file '%s'has version number 1.0", filename);
+ Error(ERR_WARN, "using high speed movement for player");
+
+ /* player was faster than monsters in (pre-)1.0 levels */
+ 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))
+ level->em_slippery_gems = TRUE;
+ }
+ else
+ {
+#if 0
+ printf("\n::: ALWAYS USE LATEST ENGINE FOR THIS LEVEL: [%d] '%s'\n",
+ leveldir_current->sort_priority, filename);
+#endif
+
+ /* Always use the latest version of the game engine for all but
+ user contributed and private levels; 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 game emulation 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;
+
+ /* map custom element change events that have changed in newer versions
+ (these following values were accidentally changed in version 3.0.1) */
+ if (level->game_version <= VERSION_IDENT(3,0,0))
+ {
+ 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_BY_PLAYER; 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_OTHER_GETS_COLLECTED; j >= CE_COLLISION; j--)
+ {
+ if (HAS_CHANGE_EVENT(element, j - 1))
+ {
+ SET_CHANGE_EVENT(element, j - 1, FALSE);
+ SET_CHANGE_EVENT(element, j, TRUE);
+ }
+ }
+ }
+ }
+
+ /* some custom element change events get mapped since version 3.0.3 */
+ for (i=0; i < NUM_CUSTOM_ELEMENTS; i++)
+ {
+ int element = EL_CUSTOM_START + i;
+
+ if (HAS_CHANGE_EVENT(element, CE_BY_PLAYER) ||
+ HAS_CHANGE_EVENT(element, CE_BY_COLLISION))
+ {
+ SET_CHANGE_EVENT(element, CE_BY_PLAYER, FALSE);
+ SET_CHANGE_EVENT(element, CE_BY_COLLISION, FALSE);
+
+ SET_CHANGE_EVENT(element, CE_BY_DIRECT_ACTION, TRUE);
+ }
+ }
+
+ /* initialize "can_change" field for old levels with only one change page */
+ if (level->game_version <= VERSION_IDENT(3,0,2))
+ {
+ 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;
+ }
+ }
+
+ /* 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++)
+ {
+ int element = level->field[x][y];
+
+ if (level->game_version <= VERSION_IDENT(2,2,0))
+ {
+ /* map game font elements */
+ element = (element == EL_CHAR('[') ? EL_CHAR_AUMLAUT :
+ element == EL_CHAR('\\') ? EL_CHAR_OUMLAUT :
+ element == EL_CHAR(']') ? EL_CHAR_UUMLAUT :
+ element == EL_CHAR('^') ? EL_CHAR_COPYRIGHT : element);
+ }
+
+ if (level->game_version < VERSION_IDENT(3,0,0))
+ {
+ /* map Supaplex gravity tube elements */
+ element = (element == EL_SP_GRAVITY_PORT_LEFT ? EL_SP_PORT_LEFT :
+ element == EL_SP_GRAVITY_PORT_RIGHT ? EL_SP_PORT_RIGHT :
+ element == EL_SP_GRAVITY_PORT_UP ? EL_SP_PORT_UP :
+ element == EL_SP_GRAVITY_PORT_DOWN ? EL_SP_PORT_DOWN :
+ element);
+ }
+
+ level->field[x][y] = element;
+ }
+ }
+
+ /* 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();
+}
+
+#else
+
+static void LoadLevel_InitLevel(struct LevelInfo *level, char *filename)
+{
+ int i, j, x, y;
+
+ if (leveldir_current == NULL) /* only when dumping level */
+ return;
+
+ /* determine correct game engine version of current level */
+ if (IS_LEVELCLASS_CONTRIBUTION(leveldir_current) ||
+ IS_LEVELCLASS_USER(leveldir_current))
+ {
+#if 0
+ printf("\n::: This level is private or contributed: '%s'\n", filename);
+#endif
+
+ /* For user contributed and private 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). */
+
+ /* do some special adjustments to support older level versions */
+ if (level->file_version == FILE_VERSION_1_0)
+ {
+ Error(ERR_WARN, "level file '%s'has version number 1.0", filename);
+ Error(ERR_WARN, "using high speed movement for player");
+
+ /* player was faster than monsters in (pre-)1.0 levels */
+ 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))
+ level->em_slippery_gems = TRUE;
+ }
+ else