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README.md

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+# SWF Checker
+
+This was written by @idkwhereisthisname, it is a tool that can detect whether a SWF file is compatible with Wii injects using FriishProduce.
+
+It checks for:
+* ActionScript verson
+* the Flash version
+* Size issues
+
+### Usage
+
+If a SWF was made with ActionScript 2 (or 1) and Flash version 8 (or older), it will say it can work with the Wii. If the 'game stage' is larger than 700x500 pixels, it will warn about possible overlapping/clipping on the Wii.

SWFChecker.py

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+import os
+import zlib
+import sys
+
+print(f"SWF Version Checker v1.0\nPython {sys.version}")
+os.system("title SWF Version Checker v1.0")
+try:
+    swf = input("SWF Filename: ").strip()
+except KeyboardInterrupt:
+    print("\nExiting...")
+    exit()
+
+def CheckSWF(swf):
+    try:
+        if not os.path.exists(swf):
+            print("Error: File not found. Please check the filename and try again.")
+            return None, None, None
+    
+        with open(swf, "rb") as f:
+            obj = f.read()
+
+        # decompress (CWS, zlib)
+        if obj[:3] == b"CWS":
+            print("SWF is compressed (zlib, CWS head), uncompressing...")
+            obj = b"FWS" + obj[3:8] + zlib.decompress(obj[8:])
+
+        flashver = obj[3]
+
+        file_attributes_index = obj.find(b'\x45')
+        if file_attributes_index != -1:
+            flag = obj[file_attributes_index + 2]
+            isas3 = bool(flag & 0x08)
+            asver = "3 (this game WILL NOT work on the Wii)" if isas3 else "1/2 (this version is compatible with the Wii!)"
+        else:
+            asver = "Unable to detect ActionScript version, please try again"
+
+        return flashver, asver, obj
+    except KeyboardInterrupt:
+        print("Exiting...")
+        exit()
+    except Exception as e:
+        print(f"Exception occurred!\n{e}")
+        exit()
+
+def GetStageWH(obj):
+    rectS = 8
+    nbits = (obj[rectS] >> 3) & 0x1F
+    bOffset = rectS * 8 + 5
+
+    def ReadBit(offset, bits_Num):
+        ByteOffs = offset // 8
+        BShift = offset % 8
+        val = int.from_bytes(obj[ByteOffs:ByteOffs + 4], "big")
+        return (val >> (32 - bits_Num - BShift)) & ((1 << bits_Num) - 1)
+
+    XMin = ReadBit(bOffset, nbits)
+    XMax = ReadBit(bOffset + nbits, nbits)
+    YMin = ReadBit(bOffset + 2 * nbits, nbits)
+    YMax = ReadBit(bOffset + 3 * nbits, nbits)
+
+    w = round((XMax - XMin) / 20, 2) 
+    h = round((YMax - YMin) / 20, 2)
+
+    return w, h
+
+flashver, asver, SWFDAT = CheckSWF(swf)
+
+if flashver is not None:
+    w, h = GetStageWH(SWFDAT)
+    print(f"SWF Dimensions: {w}x{h} pixels")
+
+    if flashver > 8:
+        print(f"Flash version: {flashver}, this version may NOT be compatible with the Wii.")
+    else:
+        print(f"Flash version: {flashver}, this version is compatible with the Wii.")
+    
+    print(f"ActionScript version: {asver}")
+
+    if w > 700 and h > 500:
+        print("WARNING: The given SWF might overlap/clip on the Wii.")
+    else:
+        print("The SWF should NOT overlap and/or clip on the Wii.")