Some tooling to extract assets

Run:
restool.py decode
to extract assets into assets/defs/*

Run:
restool.py compile
to compile the assets back into a rom

assets/animtiles_decode.py

@@ -0,0 +1,80 @@
+from decode_common import *
+
+BANK = 0x87
+
+kInstructionSet = {
+  0x8780b2: ('Delete', ''),
+  0x8780b7: ('Goto', 'G'),
+  0x87813f: ('GotoIfEventHappened', 'HG'),
+  0x878150: ('SetEventHappened', 'H'),
+  0x8781ba: ('WaitUntilAreaBossDead_DoubleRet', ''),
+  0x878303: ('GotoIfBossBitSetInArea', 'BBG'),
+  0x878320: ('SpawnTourianStatueEyeGlow', 'H'),
+  0x87832f: ('SpawnTourianStatueSoul', 'H'),
+  0x87833e: ('GotoIfTourianStatueBusy', 'G'),
+  0x878349: ('TourianStatueSetState', 'H'),
+  0x878352: ('TourianStatueClearState', 'H'),
+  0x87835b: ('Clear3PaletteColors', 'H'),
+  0x878372: ('SpawnPalfxObj', 'H'),
+  0x87837f: ('Write8PaletteColors', 'H'),
+}
+
+kCommandByName = {v[0] : (k, v[1]) for k, v in kInstructionSet.items()}
+
+class AnimtilesParser(InstrParserCommon):
+  instruction_set = kInstructionSet
+  instruction_set_term = {0x8780b7, 0x8780b2}
+  TAG = 'animtiles'
+
+  def __init__(self):
+    super().__init__()
+    self.current_array_size = None
+
+  def handle_draw_command(self, ins, ea):
+    drawp = get_word(ea + 2) | (BANK << 16)
+    assert self.current_array_size != None
+    self.blobs[drawp] = self.current_array_size
+    self.print_line(ea, f'  {ins} ! {get_ea_name(drawp)}') 
+    return 4
+  
+  def visit(self, ea, cur_size = None):
+    if cur_size == None:
+      super().visit(ea)  
+      return
+    self.current_array_size = cur_size
+    super().visit(ea)
+    self.process_queue(final = False)
+    
+  def process_queue_entry(self, ea):
+    assert ea & 0x8000
+    while ea not in self.visited:
+      self.visited.add(ea)
+      ins = get_word(ea)
+      if ins & 0x8000:
+        ea_org = ea
+        ins = (BANK << 16) | ins
+        if ins not in self.instruction_set:
+          raise Exception(f'Ins {ins:X} not in iset at {ea:X}')
+        name, operands = self.instruction_set[ins]
+        ea += 2
+        r = []
+        for op in operands:
+          if op == 'B':
+            r.append('%d' % get_byte(ea))
+            ea += 1
+          elif op == 'H':
+            r.append('%d' % get_word(ea))
+            ea += 2          
+          elif op == 'G':
+            addr = (BANK << 16) | get_word(ea)
+            r.append(get_ea_name(addr, short_label=True))
+            self.visit(addr)
+            ea += 2
+          else:
+            assert 0
+        self.print_line(ea_org, f'  {name}({", ".join(r)})') 
+        if ins in self.instruction_set_term:
+          self.print_line(ea_org + 1, '')
+          break
+      else:
+        ea += self.handle_draw_command(ins, ea)