add OverworldDebug menu

src/app/editor/overworld_editor.h

@@ -48,6 +48,8 @@ class OverworldEditor {
   absl::Status Copy() { return absl::UnimplementedError("Copy"); }
   absl::Status Paste() { return absl::UnimplementedError("Paste"); }
 
+  void OverworldDebugMenu() { overworld_debug_menu_ = true; }
+
  private:
   absl::Status DrawToolset();
   void DrawOverworldMapSettings();
@@ -57,6 +59,8 @@ class OverworldEditor {
   void DrawTile8Selector();
   void DrawAreaGraphics();
 
+  absl::Status DrawOverworldDebugMenu();
+
   void LoadGraphics();
 
   int current_world_ = 0;
@@ -70,6 +74,7 @@ class OverworldEditor {
   bool opt_enable_grid = true;
   bool all_gfx_loaded_ = false;
   bool map_blockset_loaded_ = false;
+  bool overworld_debug_menu_ = false;
 
   ImVec4 current_palette_[8];
 
@@ -89,6 +94,7 @@ class OverworldEditor {
   gfx::Bitmap tile16_blockset_bmp_;  // pointer size 1048576
   gfx::Bitmap current_gfx_bmp_;      // pointer size 32768
   gfx::Bitmap all_gfx_bmp;           // pointer size 456704
+  gfx::Bitmap overworld_map_bmp_;
 
   gui::Canvas overworld_map_canvas_;
   gui::Canvas current_gfx_canvas_;