mirror of
https://github.com/gurrgur/er-patcher.git
synced 2026-06-13 09:47:54 +00:00
87 lines
3.2 KiB
Python
Executable file
87 lines
3.2 KiB
Python
Executable file
#!/usr/bin/env python3
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import os
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import sys
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import subprocess
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import argparse
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from pathlib import Path
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import struct
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if __name__ == "__main__":
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if "--" in sys.argv:
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patcher_args = sys.argv[1:sys.argv.index("--")]
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else:
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patcher_args = sys.argv[1:]
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parser = argparse.ArgumentParser(description="Patch Elden Ring executable and launch it without EAC.")
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parser.add_argument("-r", "--rate", type=int, default=60, help="Modify the frame rate limit (e.g. 30, 120, 165 or whatever).")
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parser.add_argument("-u", "--ultrawide", action=argparse.BooleanOptionalAction, help="Removes black bars when using a resolution with an aspect ratio other than 16:9.")
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parser.add_argument("-v", "--disable-vigniette", action=argparse.BooleanOptionalAction, help="Disables the vigniette overlay.")
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parser.add_argument("-c", "--disable-ca", action=argparse.BooleanOptionalAction, help="Disables chromatic abberation.")
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parser.add_argument("-a", "--increase-animation-distance", action=argparse.BooleanOptionalAction, help="Increase animation distance.")
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parser.add_argument("-f", "--remove-60hz-fullscreen", action=argparse.BooleanOptionalAction, help="Remove 60hz lock in fullscreen.")
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patch = parser.parse_args(patcher_args)
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exe_name = Path("eldenring.exe")
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with open(exe_name, "rb") as f:
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exe_hex = f.read().hex()
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if patch.rate != 60 and patch.rate > 0:
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exe_hex = exe_hex.replace(
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"c743208988883ceb43897318ebca897318",
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"c743208988883ceb43897318ebca897318".replace(
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"8988883c", struct.pack('<f', 1 / patch.rate).hex()
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)
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)
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if patch.ultrawide:
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exe_hex = exe_hex.replace(
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"8b0185c07442448b5904",
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"8b0185c0eb42448b5904"
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)
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if patch.disable_vigniette:
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exe_hex = exe_hex.replace(
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"f30f590514a76e01f3440f5cc8f3450f5ecb",
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"f30f590524b56e01f3440f5cc8f3450f5ecb"
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)
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if patch.disable_ca:
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ca_addr = 94 + exe_hex.index("0f114360488d8b800000000f1087a00000000f1141f0488d87b00000000f10080f1109")
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if exe_hex[ca_addr:ca_addr + 8] == "0f114920":
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exe_hex = exe_hex[:ca_addr] + "660fefc9" + exe_hex[ca_addr + 8:] # PXOR XMM1,XMM1
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if patch.increase_animation_distance:
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# DIVSS XMM1,dword ptr [R12 + 0x54] -> XORPS XMM1,XMM1; PXOR XMM1,XMM1
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exe_hex = exe_hex.replace(
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"e82b309c010f28f80f28c6e820359c01f30f5ef80f28cff3410f5e4c2454",
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"e82b309c010f28f80f28c6e820359c01f30f5ef80f28cf0f57c9660fefc9"
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)
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if patch.remove_60hz_fullscreen:
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exe_hex = exe_hex.replace(
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"c745ef3c000000",
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"c745ef00000000"
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)
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patched_exe_dir = Path("./er-patcher-tmp")
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if not patched_exe_dir.is_dir():
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patched_exe_dir.mkdir()
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with open(patched_exe_dir / exe_name, "wb") as f:
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f.write(bytes.fromhex(exe_hex))
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del exe_hex
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# start patched exe directly to avoid EAC
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if "--" in sys.argv:
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steam_cmd = sys.argv[1 + sys.argv.index("--"):]
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else:
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steam_cmd = [exe_name]
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steam_cmd[-1] = Path(steam_cmd[-1]).parent.absolute() / patched_exe_dir / exe_name
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subprocess.run(steam_cmd)
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os.remove(patched_exe_dir / exe_name)
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os.rmdir(patched_exe_dir)
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