texel - calc aux hash for PC2

__init__.py

@@ -3,7 +3,7 @@
     "name": "Frontier's Cobra Engine Formats",
     "author": "Harlequinz Ego, HENDRIX et al.",
     "blender": (4, 0, 0),
-    "version": (2024, 11, 18),
+    "version": (2024, 11, 19),
     "location": "File > Import-Export",
     "description": "Import-Export models, skeletons and animations",
     "warning": "",

__version__.py

@@ -1,4 +1,4 @@
 # this file is auto-generated by the pre-commit hook increment_version.py
-VERSION = "2024.11.18"
-COMMIT_HASH = "986059478"
-COMMIT_TIME = "Mon Nov 18 16:49:32 2024 +0100"
+VERSION = "2024.11.19"
+COMMIT_HASH = "deac0d086"
+COMMIT_TIME = "Tue Nov 19 17:06:41 2024 +0100"

modules/formats/DDS.py

@@ -9,6 +9,7 @@
 from generated.formats.tex.compounds.TexHeader import TexHeader
 from generated.formats.tex.compounds.TexturestreamHeader import TexturestreamHeader
 from modules.formats.BaseFormat import MemStructLoader, BaseFile
+from modules.formats.shared import fnv64, encode_int64_base32
 
 from ovl_util import texconv, imarray
 
@@ -388,3 +389,21 @@ def get_tiles(self, size_info):
 class TexelLoader(BaseFile):
 	extension = ".texel"
 
+	def get_aux_path(self, aux_suffix):
+		"""Get path of aux file from ovl name and texel name"""
+		# Full Archive path:
+		#   Win64\ovldata\Content0\Worlds\DefaultSandbox.ovl
+		# File in Archive:
+		#   /zz159oeel9rhs8ex.texel
+		# File in tex header:
+		#   zz159oeel9rhs8ex
+		# Input Text
+		# text = b"defaultsandbox_/zz159oeel9rhs8ex_texel"
+		# Resulting Lookup:
+		#   XERY2OUE5ECDC_.aux
+		# Result:
+		# XERY2OUE5ECDC
+		assert not aux_suffix
+		text = f"{self.ovl.basename}_{self.name.replace('.', '_')}".lower().encode()
+		hash_value = fnv64(text)
+		return os.path.join(self.ovl.dir, f"{encode_int64_base32(hash_value)}_.aux")

modules/formats/shared.py

@@ -1,6 +1,7 @@
 import contextlib
 import functools
 import logging
+import os
 import struct
 import time
 
@@ -28,6 +29,28 @@ def djb2(s):
     return n & 0xFFFFFFFF
 
 
+def fnv64(data):
+    hash_ = 0xcbf29ce484222325
+    for b in data:
+        hash_ *= 0x100000001b3
+        hash_ &= 0xffffffffffffffff
+        hash_ ^= b
+    return hash_
+
+
+def encode_int64_base32(integer, charset="ABCDEFGHIJKLMNOPQRSTUVWXYZ012345"):
+    """Encodes a 64-bit integer into a base32 string with a custom charset."""
+    encoded = ""
+    while integer > 0:
+        index = integer & 0x1F
+        encoded += charset[index]
+        integer >>= 5
+
+    return encoded
+
+
+
+
 def fmt_hash(id_hash):
     return "".join([f"{b:02X}" for b in struct.pack("<I", id_hash)])
 

pyproject.toml

@@ -4,7 +4,7 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name = "cobra-tools"
-version = "2024.11.18"
+version = "2024.11.19"
 readme = "README.md"
 license = { file = "LICENSE" }
 requires-python = "==3.11.*"