palette viewer and editor

src/app/editor/palette_editor.h

@@ -5,6 +5,7 @@
 
 #include "absl/status/status.h"
 #include "app/gfx/snes_palette.h"
+#include "app/rom.h"
 #include "gui/canvas.h"
 #include "gui/icons.h"
 
@@ -17,11 +18,21 @@ static constexpr absl::string_view kPaletteCategoryNames[] = {
     "Area Colors", "Enemies",  "Dungeons", "World Map",
     "Dungeon Map", "Triforce", "Crystal"};
 
+static constexpr absl::string_view kPaletteGroupNames[] = {
+    "swords",       "shields",   "armors",  "ow_main",
+    "ow_aux", "global_sprites",  "dungeon_main", "ow_mini_map",
+    "ow_mini_map", "3d_object", "3d_object"};
+
 class PaletteEditor {
  public:
   absl::Status Update();
+  absl::Status DisplayPalette(gfx::SNESPalette& palette, bool loaded);
+
+  auto SetupROM(ROM& rom) { rom_ = rom; }
 
  private:
+  ImVec4 current_color_;
+  ROM rom_;
 };
 
 }  // namespace editor