146,147,175,65,66,64,2,18
};
-int cleanup_em_level(unsigned char *src, int length)
+static boolean filename_has_v1_format(char *filename)
{
- int file_version = 0;
+ char *basename = getBaseNamePtr(filename);
+
+ return (strlen(basename) == 3 &&
+ basename[0] == 'a' &&
+ basename[1] >= 'a' && basename[1] <= 'k' &&
+ basename[2] >= '0' && basename[2] <= '9');
+}
+
+int cleanup_em_level(unsigned char *src, int length, char *filename)
+{
+ int file_version = FILE_VERSION_EM_UNKNOWN;
int i;
if (length >= 2172 &&
- src[2106] == 255 &&
- src[2107] == 54 &&
- src[2108] == 48 &&
- src[2109] == 48)
+ src[2106] == 255 && /* version id: */
+ src[2107] == 54 && /* '6' */
+ src[2108] == 48 && /* '0' */
+ src[2109] == 48) /* '0' */
{
/* ---------- this cave has V6 file format ---------- */
file_version = FILE_VERSION_EM_V6;
+ /* remap elements to internal EMC level format */
for (i = 0; i < 2048; i++)
src[i] = remap_v6[src[i]];
for (i = 2048; i < 2084; i++)
src[i] = remap_v6[src[i]];
}
else if (length >= 2110 &&
- src[2106] == 255 &&
- src[2107] == 53 &&
- src[2108] == 48 &&
- src[2109] == 48)
+ src[2106] == 255 && /* version id: */
+ src[2107] == 53 && /* '5' */
+ src[2108] == 48 && /* '0' */
+ src[2109] == 48) /* '0' */
{
/* ---------- this cave has V5 file format ---------- */
file_version = FILE_VERSION_EM_V5;
+ /* remap elements to internal EMC level format */
for (i = 0; i < 2048; i++)
src[i] = remap_v5[src[i]];
for (i = 2048; i < 2084; i++)
for (i = 2112; i < 2148; i++)
src[i] = src[i - 64];
}
+
+#if 1 /* ================================================================== */
+
+ else if (length >= 2106 &&
+ (src[1983] == 27 || /* encrypted (only EM I/II/III) */
+ src[1983] == 116 || /* unencrypted (usual case) */
+ src[1983] == 131)) /* unencrypted (rare case) */
+ {
+ /* ---------- this cave has V1, V2 or V3 file format ---------- */
+
+ boolean fix_copyright = FALSE;
+
+ /*
+ byte at position 1983 (0x07bf) is used as "magic byte":
+ - 27 (0x1b) => encrypted level (V3 only / Kingsoft original games)
+ - 116 (0x74) => unencrypted level (byte is corrected to 131 (0x83))
+ - 131 (0x83) => unencrypted level (happens only in very rare cases)
+ */
+
+ if (src[1983] == 27) /* (0x1b) -- after decryption: 116 (0x74) */
+ {
+ /* this is original (encrypted) Emerald Mine I, II or III level file */
+
+ int first_byte = src[0];
+ unsigned char code0 = 0x65;
+ unsigned char code1 = 0x11;
+
+ /* decode encrypted level data */
+ for (i = 0; i < 2106; i++)
+ {
+ src[i] ^= code0;
+ src[i] -= code1;
+
+ code0 = (code0 + 7) & 0xff;
+ }
+
+ src[1] = 131; /* needed for all Emerald Mine levels */
+
+ /* first byte is either 0xf1 (EM I and III) or 0xf5 (EM II) */
+ if (first_byte == 0xf5)
+ {
+ src[0] = 131; /* only needed for Emerald Mine II levels */
+
+ fix_copyright = TRUE;
+ }
+
+ /* ---------- this cave has V3 file format ---------- */
+ file_version = FILE_VERSION_EM_V3;
+ }
+ else if (filename_has_v1_format(filename))
+ {
+ /* ---------- this cave has V1 file format ---------- */
+ file_version = FILE_VERSION_EM_V1;
+ }
+ else
+ {
+ /* ---------- this cave has V2 file format ---------- */
+ file_version = FILE_VERSION_EM_V2;
+ }
+
+ /* remap elements to internal EMC level format */
+ for (i = 0; i < 2048; i++)
+ src[i] = remap_v4[src[i]];
+ for (i = 2048; i < 2084; i++)
+ src[i] = remap_v4eater[src[i] >= 28 ? 0 : src[i]];
+ for (i = 2112; i < 2148; i++)
+ src[i] = src[i - 64];
+
+ if (fix_copyright) /* fix "(c)" sign in Emerald Mine II levels */
+ {
+ for (i = 0; i < 2048; i++)
+ if (src[i] == 241)
+ src[i] = 254; /* replace 'Xdecor_1' with 'Xalpha_copyr' */
+ }
+ }
+ else
+ {
+ /* ---------- this cave has unknown file format ---------- */
+
+ /* if file has length of old-style level file, print (wrong) magic byte */
+ if (length < 2110)
+ Error(ERR_WARN, "unknown magic byte 0x%02x at position 0x%04x",
+ src[1983], 1983);
+
+ return FILE_VERSION_EM_UNKNOWN;
+ }
+
+#else /* ================================================================== */
+
#if 0
else if (length >= 2106) /* !!! TEST ONLY: SHOW BROKEN LEVELS !!! */
#else
/* ---------- this cave has V4 file format ---------- */
file_version = FILE_VERSION_EM_V4;
+ /* remap elements to internal EMC level format */
for (i = 0; i < 2048; i++)
src[i] = remap_v4[src[i]];
for (i = 2048; i < 2084; i++)
src[i] = remap_v4eater[src[i] >= 28 ? 0 : src[i]];
- for (i = 2112; i < 2148; i++) src[i] = src[i - 64];
+ for (i = 2112; i < 2148; i++)
+ src[i] = src[i - 64];
}
else if (length >= 2106 &&
- src[0] == 241 && /* <-- Emerald Mine I levels */
+ src[0] == 241 && /* <-- Emerald Mine I and III levels */
src[1983] == 27)
{
unsigned char j = 94;
/* ---------- this cave has V3 file format ---------- */
file_version = FILE_VERSION_EM_V3;
+ /* decrypt encrypted level file */
for (i = 0; i < 2106; i++)
src[i] = (src[i] ^ (j += 7)) - 0x11;
+
src[1] = 131;
+
+ /* remap elements to internal EMC level format */
for (i = 0; i < 2048; i++)
src[i] = remap_v4[src[i]];
for (i = 2048; i < 2084; i++)
/* ---------- this cave has V3 file format ---------- */
file_version = FILE_VERSION_EM_V3;
+ /* decrypt encrypted level file */
for (i = 0; i < 2106; i++)
src[i] = (src[i] ^ (j += 7)) - 0x11;
+
src[0] = 131; /* needed for Emerald Mine II levels */
src[1] = 131;
+
+ /* remap elements to internal EMC level format */
for (i = 0; i < 2048; i++)
src[i] = remap_v4[src[i]];
for (i = 2048; i < 2084; i++)
return 0;
}
+#endif /* ================================================================== */
+
if (file_version < FILE_VERSION_EM_V6)
{
/* id */
- src[2106] = 255;
- src[2107] = 54;
- src[2108] = 48;
- src[2109] = 48;
+ src[2106] = 255; /* version id: */
+ src[2107] = 54; /* '6' */
+ src[2108] = 48; /* '0' */
+ src[2109] = 48; /* '0' */
/* time */
i = src[2094] * 10;
+ /* stored level time of levels for the V2 player was changed to 50% of the
+ time for the V1 player (original V3 levels already considered this) */
+ if (file_version != FILE_VERSION_EM_V1 &&
+ file_version != FILE_VERSION_EM_V3)
+ i /= 2;
src[2110] = i >> 8;
src[2111] = i;
/* ball data */
src[2159] = 128;
+
+#if 0
+ printf("::: STORED TIME (< V6): %d s\n", src[2094] * 10);
+#endif
}
+#if 0
+ else
+ {
+ printf("::: STORED TIME (>= V6): %d s\n", src[2110] * 256 + src[2111]);
+ }
+#endif
/* ---------- at this stage, the cave data always has V6 format ---------- */
src[i] = 147;
#if 0
+
/* fix acid */
for (i = 64; i < 2048; i++)
if (src[i] == 63) /* replace element above 'Xacid_s' ... */
src[i - 64] = 101; /* ... with 'Xacid_1' */
+#else
+
+#if 1
+ /* fix acid */
+ for (i = 64; i < 2048; i++)
+ if (src[i] == 63) /* replace element above 'Xacid_s' ... */
+ src[i - 64] = 101; /* ... with 'Xacid_1' */
+
+ /* fix acid with no base beneath it (see below for details (*)) */
+ for (i = 64; i < 2048 - 1; i++)
+ {
+ if (file_version <= FILE_VERSION_EM_V2 &&
+ src[i - 64] == 101 && src[i] != 63) /* acid without base */
+ {
+ if (src[i - 1] == 101 || /* remove acid over acid row */
+ src[i + 1] == 101)
+ src[i - 64] = 6; /* replace element above with 'Xblank' */
+ else
+ src[i - 64] = 255; /* replace element above with 'Xfake_acid_1' */
+ }
+ }
+
#else
/* fix acid */
{
if (src[i] == 63) /* 'Xacid_s' (acid pool, bottom middle) */
{
- if (file_version == FILE_VERSION_EM_V4 &&
+ if (file_version <= FILE_VERSION_EM_V2 &&
i < 2048 - 64 && src[i + 64] == 63)
- src[i - 64] = 255; /* replace element above with 'Xfake_acid_1' */
+ {
+ int obj_left = remap_emerald[src[i - 1]];
+ int obj_right = remap_emerald[src[i + 1]];
+
+ if (obj_left == Xblank || obj_right == Xblank ||
+ obj_left == Xplant || obj_right == Xplant)
+ src[i - 64] = 6; /* replace element above with 'Xblank' */
+ else
+ src[i - 64] = 255; /* replace element above with 'Xfake_acid_1' */
+ }
else
+ {
src[i - 64] = 101; /* replace element above with 'Xacid_1' */
+ }
}
}
+#endif
#endif
/* fix acid in eater 1 */
/* size of v6 cave */
length = 2172;
+#if 1
#if 1
if (options.debug)
+#endif
printf("::: EM level file version: %d\n", file_version);
#endif
* in eater.
* - acid is always deadly even with no base beneath it (this breaks cave 0 in
* downunder mine 16)
+ * (*) fixed (see above):
+ * - downunder mine 16, level 0, works again
+ * - downunder mine 11, level 71, corrected (only cosmetically)
*
* so far all below have not broken any caves:
*
{
int em_element = remap_emerald[em_element_raw];
- if (file_version <= FILE_VERSION_EM_V4)
+ if (file_version < FILE_VERSION_EM_V5)
{
- /* versions up to V4 had no grass, but only sand/dirt */
+ /* versions below V5 had no grass, but only sand/dirt */
if (em_element == Xgrass)
em_element = Xdirt;
}
projects / rocksndiamonds.git / commitdiff