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Minor enhanement ;) (#488)

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Lightning 2021-10-21 10:38:17 -07:00 committed by GitHub
parent 149b764045
commit f6fa89bbc4
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1 changed files with 10 additions and 12 deletions
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22
tools/build/mapfs/combine.py
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@ -4,6 +4,7 @@ import os
from sys import argv
from pathlib import Path
from itertools import tee
import struct
def next_multiple(pos, multiple):
return pos + pos % multiple
@ -20,7 +21,6 @@ def build_mapfs(out_bin, assets, version):
# every TOC entry's name field has data after the null terminator made up from all the previous name fields.
# we probably don't have to do this for the game to read the data properly (it doesn't read past the null terminator
# of `string`), but the original devs' equivalent of this script had this bug so we need to replicate it to match.
written_names = []
with open(out_bin, "wb") as f:
f.write(get_version_date(version).encode("ascii"))
@ -28,6 +28,7 @@ def build_mapfs(out_bin, assets, version):
next_data_pos = (len(assets) + 1) * 0x1C
asset_idx = 0
lastname = ""
for decompressed, compressed in assets:
toc_entry_pos = 0x20 + asset_idx * 0x1C
@ -39,17 +40,14 @@ def build_mapfs(out_bin, assets, version):
#print(f"{name} {offset:08X} {size:08X} {decompressed_size:08X}")
written_names.append(name)
# write all previously-written names; required to match
for prev_name in written_names:
f.seek(toc_entry_pos)
f.write(prev_name.encode('ascii'))
lastname = name + lastname[len(name):]
f.seek(toc_entry_pos)
f.write(lastname.encode('ascii'))
# write TOC entry.
f.seek(toc_entry_pos + 0x10)
f.write(offset.to_bytes(4, byteorder="big"))
f.write(size.to_bytes(4, byteorder="big"))
f.write(decompressed_size.to_bytes(4, byteorder="big"))
f.write(struct.pack(">III", offset, size, decompressed_size))
# write data.
f.seek(0x20 + next_data_pos)
@ -61,10 +59,10 @@ def build_mapfs(out_bin, assets, version):
# end_data
toc_entry_pos = 0x20 + asset_idx * 0x1C
written_names.append("end_data\0")
for prev_name in written_names:
f.seek(toc_entry_pos)
f.write(prev_name.encode('ascii'))
last_name_entry = "end_data\0"
f.seek(toc_entry_pos)
lastname = last_name_entry + lastname[len(last_name_entry):]
f.write(lastname.encode('ascii'))
f.seek(toc_entry_pos + 0x18)
f.write((0x903F0000).to_bytes(4, byteorder="big")) # TODO: figure out purpose