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- #!/usr/bin/env python3
- import sys
- import subprocess
- import argparse
- from pathlib import Path
- import struct
- import re
- from shutil import rmtree
- if __name__ == "__main__":
- patcher_args = None #sys.argv[1:sys.argv.index("--")]
- parser = argparse.ArgumentParser(description="Patch Elden Ring executable and launch it without EAC.")
- parser.add_argument("-r", "--rate", type=int, default=60, help="Modify the frame rate limit (e.g. 30, 120, 165 or whatever).")
- parser.add_argument("-x", "--executable", action='store', type=str, default="eldenring.exe", help="The executable to launch, relative to the games folder.")
- parser.add_argument("--with-eac", action='store_true', help="Run game with EAC (Use at own your risk)")
- parser.add_argument("--disable-rune-loss", action='store_true', help="Disable losing runes upon death.")
- parser.add_argument("--all", action='store_true', help="Enable all options except rate adjustment and gamplay changes like `--disable-rune-loss`.")
- parser.add_argument("-u", "--ultrawide", action='store_true', help="Removes black bars when using a resolution with an aspect ratio other than 16:9.")
- parser.add_argument("-v", "--disable-vignette", action='store_true', help="Disables the vignette overlay.")
- parser.add_argument("-c", "--disable-ca", action='store_true', help="Disables chromatic abberation.")
- parser.add_argument("-a", "--increase-animation-distance", action='store_true', help="Increase animation distance.")
- parser.add_argument("-s", "--skip-intro", action='store_true', help="Skip intro logos.")
- parser.add_argument("-f", "--remove-60hz-fullscreen", action='store_true', help="Remove 60hz lock in fullscreen.")
- patch = parser.parse_args(patcher_args)
- if patch.with_eac and patch.executable != "eldenring.exe":
- print("er-patcher: --with-eac is mutually exclusive with --executable")
- sys.exit(1)
- game_dir = Path(".")
- with open(game_dir / "eldenring.exe", "rb") as f:
- exe_hex = f.read().hex()
- if patch.rate != 60 and patch.rate > 0:
- r_pattern = "c7 43 20 89 88 88 3c eb 43 89 73 18 eb ca 89 73 18".replace(" ", "")
- if (res := re.search(r_pattern, exe_hex)) is not None:
- r_addr = res.span()[0] + 6
- r_patch = struct.pack('<f', 1 / patch.rate).hex()
- exe_hex = exe_hex[:r_addr] + r_patch + exe_hex[r_addr + len(r_patch):]
- else:
- print("er-patcher: rate pattern scan failed")
- if patch.disable_rune_loss:
- rl_pattern = "b0 01 .. 8b .. e8 .. .. .. .. .. 8b .. .. .. 32 c0 .. 83 .. 28 c3".replace(" ", "")
- if (res := re.search(rl_pattern, exe_hex)) is not None:
- rl_addr = res.span()[0] + 6
- rl_patch = "90 90 90 90 90".replace(" ", "") # NOP
- exe_hex = exe_hex[:rl_addr] + rl_patch + exe_hex[rl_addr + len(rl_patch):]
- else:
- print("er-patcher: disable rune loss pattern scan failed")
- if patch.ultrawide or patch.all:
- uw_pattern = "74 4f 45 8b 94 cc".replace(" ", "")
- if (res := re.search(uw_pattern, exe_hex)) is not None:
- uw_addr = res.span()[0]
- uw_patch = "eb"
- exe_hex = exe_hex[:uw_addr] + uw_patch + exe_hex[uw_addr + len(uw_patch):]
- else:
- print("er-patcher: ultrawide pattern scan failed")
- if patch.disable_vignette or patch.all:
- v_pattern = 'f3 0f 10 .. .. f3 0f 59 .. .. .. .. .. e8 .. .. .. .. f3 41 0f .. .. f3 45 0f .. .. 4c 8d .. .. .. .. .. .. 48'.replace(" ", "")
- if (res := re.search(v_pattern, exe_hex)) is not None:
- v_addr = res.span()[0] + 46
- v_patch = "f3 0f 5c c0 90".replace(" ", "") # SUBSS XMM0,XMM0; NOP; all NOP does work too
- exe_hex = exe_hex[:v_addr] + v_patch + exe_hex[v_addr + len(v_patch):]
- else:
- print("er-patcher: disable_vignette pattern scan failed")
- if patch.disable_ca or patch.all:
- ca_pattern = "0f 11 43 60 48 8d 8b 80 00 00 00 0f 10 87 a0 00 00 00 0f 11 41 f0 48 8d 87 b0 00 00 00 0f 10 08 0f 11 09".replace(" ", "")
- if (res := re.search(ca_pattern, exe_hex)) is not None:
- ca_addr = res.span()[0] + 94
- ca_orig = "0f 11 49 20".replace(" ", "")
- ca_patch = "66 0f ef c9".replace(" ", "") # PXOR XMM1,XMM1
- if exe_hex[ca_addr:ca_addr + len(ca_patch)] == ca_orig:
- exe_hex = exe_hex[:ca_addr] + ca_patch + exe_hex[ca_addr + len(ca_patch):]
- else:
- print("er-patcher: disable_ca pattern scan failed")
- if patch.increase_animation_distance or patch.all:
- iad_pattern = "e8 .. .. .. .. 0f 28 .. 0f 28 .. e8 .. .. .. .. f3 0f .. .. 0f 28 .. f3 41 0f 5e 4c 24 54".replace(" ", "")
- if (res := re.search(iad_pattern, exe_hex)) is not None:
- iad_addr = res.span()[0] + 46
- iad_patch = "0f 57 c9 66 0f ef c9".replace(" ", "") # DIVSS XMM1,dword ptr [R12 + 0x54] -> XORPS XMM1,XMM1; PXOR XMM1,XMM1
- exe_hex = exe_hex[:iad_addr] + iad_patch + exe_hex[iad_addr + len(iad_patch):]
- else:
- print("er-patcher: increase_animation_distance pattern scan failed")
- if patch.skip_intro or patch.all:
- si_pattern = "80 bf b8 00 00 00 00 74 53 48".replace(" ", "")
- if (res := re.search(si_pattern, exe_hex)) is not None:
- si_addr = res.span()[0] + 14
- si_patch = "90 90".replace(" ", "")
- exe_hex = exe_hex[:si_addr] + si_patch + exe_hex[si_addr + len(si_patch):]
- else:
- print("er-patcher: skip_intro pattern scan failed")
- if patch.remove_60hz_fullscreen or patch.all:
- fs_pattern = "c7 45 ef 3c 00 00 00".replace(" ", "")
- if (res := re.search(fs_pattern, exe_hex)) is not None:
- fs_addr = res.span()[0] + 6
- fs_patch = "00"
- exe_hex = exe_hex[:fs_addr] + fs_patch + exe_hex[fs_addr + len(fs_patch):]
- else:
- print("er-patcher: remove_60hz_fullscreen pattern scan failed")
- game_dir_patched = Path("er-patcher-tmp")
- if not game_dir_patched.is_dir():
- game_dir_patched.mkdir()
- with open(game_dir_patched / "eldenring.exe", "wb") as f:
- f.write(bytes.fromhex(exe_hex))
- del exe_hex
- # recreate game directory tree in game_dir_patched
- game_dirs = [d for d in game_dir.rglob("*") if d.is_dir()]
- for d in game_dirs:
- if d == game_dir_patched:
- continue
- if not (game_dir_patched / d).is_dir():
- (game_dir_patched / d).mkdir(parents=True)
- # hard link game files to game_dir_patched; symbolic links would be easier
- # to handle but by default windows 10 doesn't allow them
- # game_files = [f for f in game_dir.rglob("*") if f.is_file()]
- # for f in game_files:
- # if f.name in ["eldenring.exe", "er-patcher"]:
- # continue
- # if not (game_dir_patched / f).is_file():
- # (game_dir_patched / f).hardlink_to(f)
- # start patched exe directly to avoid EAC
- # steam_cmd = sys.argv[1 + sys.argv.index("--"):]
- # steam_cmd[-1] = Path(steam_cmd[-1]).parent.absolute() / game_dir_patched / ("start_protected_game.exe" if patch.with_eac else patch.executable)
- # subprocess.run(steam_cmd, cwd=steam_cmd[-1].parent.absolute())
- # cleanup
- # rmtree(game_dir_patched)
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