LADX: Give better feedback during patching (#5401)

worlds/ladx/__init__.py

@@ -4,8 +4,10 @@ import os
 import typing
 import logging
 import re
+import struct
 
 import settings
+import Utils
 from BaseClasses import CollectionState, Entrance, Item, ItemClassification, Location, Tutorial
 from Fill import fill_restrictive
 from worlds.AutoWorld import WebWorld, World
@@ -50,6 +52,17 @@ class LinksAwakeningSettings(settings.Group):
         description = "LADX ROM File"
         md5s = [LADXProcedurePatch.hash]
 
+        @classmethod
+        def validate(cls, path: str) -> None:
+            try:
+                super().validate(path)
+            except ValueError:
+                Utils.messagebox(
+                    "Error",
+                    "Provided rom does not match hash for English 1.0/revision-0 of Link's Awakening DX",
+                    True)
+                raise
+
     class RomStart(str):
         """
         Set this to false to never autostart a rom (such as after patching)
@@ -71,6 +84,24 @@ class LinksAwakeningSettings(settings.Group):
         Only .bin or .bdiff files
         The same directory will be checked for a matching text modification file
         """
+        def browse(self, filetypes=None, **kwargs):
+            filetypes = [("Binary / Patch files", [".bin", ".bdiff"])]
+            return super().browse(filetypes=filetypes, **kwargs)
+
+        @classmethod
+        def validate(cls, path: str) -> None:
+            with open(path, "rb", buffering=0) as f:
+                header, size = struct.unpack("<II", f.read()[:8])
+                if path.endswith('.bin') and header == 0xDEADBEEF and size < 1024:
+                    # detect extended spritesheets from upstream ladxr
+                    Utils.messagebox(
+                        "Error",
+                        "Extended sprite sheets are not supported. Try again with a different gfxmod file, "
+                        "or provide no file to continue without modifying graphics.",
+                        True)
+                    raise ValueError("Provided gfxmod file is an extended sheet, which is not supported")
+
+
 
     rom_file: RomFile = RomFile(RomFile.copy_to)
     rom_start: typing.Union[RomStart, bool] = True