Get rid of gItemIconTable (#4579)

* Get rid of gItemIconTable

* Move the script to the folder

include/item.h

@@ -23,6 +23,8 @@ struct Item
     u8 type;
     u8 battleUsage;
     u8 flingPower;
+    const u32 *iconSprite;
+    const u32 *iconPalette;
 };
 
 struct BagPocket

include/item_icon.h

@@ -11,6 +11,7 @@ void FreeItemIconTemporaryBuffers(void);
 void CopyItemIconPicTo4x4Buffer(const void *src, void *dest);
 u8 AddItemIconSprite(u16 tilesTag, u16 paletteTag, u16 itemId);
 u8 AddCustomItemIconSprite(const struct SpriteTemplate *customSpriteTemplate, u16 tilesTag, u16 paletteTag, u16 itemId);
-const void *GetItemIconPicOrPalette(u16 itemId, u8 which);
+const void *GetItemIconSprite(u16 itemId);
+const void *GetItemIconPalette(u16 itemId);
 
 #endif //GUARD_ITEM_ICON_H

migration_scripts/convert_item_icons.py

@@ -0,0 +1,45 @@
+import glob
+import re
+import os
+
+if not os.path.exists("Makefile"):
+    print("Please run this script from your root folder.")
+    quit()
+
+# Read item_icon_table.h and extract the icon and palette information
+for file in glob.glob('./src/data/item_icon_table.h'):
+    with open(file, 'r') as f:
+        icon_table_content = f.read()
+
+# Extract item icon and palette data from item_icon_table.h
+icon_table_pattern = re.compile(r'\[(ITEM_[A-Z_0-9]+)\]\s*=\s*\{([^,]+),\s*([^}]+)\}', re.MULTILINE)
+icon_table_data = {}
+for match in icon_table_pattern.findall(icon_table_content):
+    if len(match) == 3:
+        item_name, icon_sprite, icon_palette = match
+        icon_table_data[item_name] = (icon_sprite, icon_palette)
+
+# Read items.h content
+for file in glob.glob('./src/data/items.h'):
+    with open(file, 'r') as f:
+        items_content = f.read()
+
+# Modify items.h content
+def add_icon_data(match):
+    item_name = match.group(1)
+    item_content = match.group(2)
+    if item_name in icon_table_data:
+        icon_sprite, icon_palette = icon_table_data[item_name]
+        print(f"Updating {item_name}: adding iconSprite = {icon_sprite}, iconPalette = {icon_palette}")
+        return f'[{item_name}] =\n    {{{item_content}    .iconSprite = {icon_sprite},\n        .iconPalette = {icon_palette},\n    }},'
+    else:
+        return match.group(0)
+
+item_pattern = re.compile(r'\[(ITEM_[A-Z_0-9]+)\]\s*=\s*\{([\s\S]*?)\},', re.DOTALL)
+modified_items_content = item_pattern.sub(add_icon_data, items_content)
+
+# Write the modified content back to items.h
+for file in glob.glob('./src/data/items.h'):
+    with open(file, 'w') as f:
+        f.write(modified_items_content)
+        print("items.h has been updated")