Add stage layer asset sources

game/src/data/level_definition.h

@@ -16,10 +16,20 @@ enum class StageLayerRole {
   PropsFront
 };
 
+struct StageLayerSource {
+  std::string texturePath;
+  frostbite2D::Rect sourceRect;
+  bool useSourceRect = false;
+  frostbite2D::Color tint = frostbite2D::Color(1.0f, 1.0f, 1.0f, 1.0f);
+
+  bool hasTexture() const { return !texturePath.empty(); }
+};
+
 struct StageRect {
   frostbite2D::Rect bounds;
   frostbite2D::Color color;
   StageLayerRole layer = StageLayerRole::PropsBack;
+  StageLayerSource source;
 };
 
 struct SpawnPoint {

game/src/data/stage_asset_slots.h

@@ -0,0 +1,18 @@
+#pragma once
+
+namespace ns_game::stage_assets::stage_01 {
+
+constexpr const char* kBackgroundFar =
+    "assets/stage/stage_01/background/background_far.png";
+constexpr const char* kBackgroundMid =
+    "assets/stage/stage_01/background/background_mid.png";
+constexpr const char* kTileset =
+    "assets/stage/stage_01/tiles/stage_01_tileset.png";
+constexpr const char* kProps =
+    "assets/stage/stage_01/props/stage_01_props.png";
+constexpr const char* kHitSpark =
+    "assets/stage/stage_01/effects/hit_spark.png";
+constexpr const char* kDust =
+    "assets/stage/stage_01/effects/dust.png";
+
+} // namespace ns_game::stage_assets::stage_01