Martin/fix background clear

sketches/test-clear/build.sh

@@ -15,7 +15,7 @@ wasmFlags=(--target=wasm32 \
   -I "$ORCA_DIR"/src/ext)
 
 # build sample as wasm module and link it with the orca module
-clang "${wasmFlags[@]}" -L "$ORCA_DIR"/bin -lorca_wasm -o module.wasm src/main.c
+clang "${wasmFlags[@]}" -L "$ORCA_DIR"/bin -lorca_wasm -o module.wasm main.c
 
 # create app directory and copy files into it
-orca bundle --name Clock --icon icon.png --resource-dir data module.wasm
+orca bundle --name Test module.wasm

src/runtime.c

@@ -994,7 +994,8 @@ i32 orca_runloop(void* user)
         }
         else
         {
-            oc_set_color_rgba(1, 0, 0, 1);
+            oc_surface_bring_to_front(app->debugOverlay.surface);
+            oc_set_color_rgba(0, 0, 0, 0);
             oc_clear();
         }