diff --git a/app/src/util/sdl.c b/app/src/util/sdl.c
index 07921817..84ce357d 100644
--- a/app/src/util/sdl.c
+++ b/app/src/util/sdl.c
@@ -130,6 +130,25 @@ sc_sdl_hide_window(SDL_Window *window) {
     }
 }
 
+struct sc_size
+sc_sdl_get_render_output_size(SDL_Renderer *renderer) {
+    int width;
+    int height;
+    bool ok = SDL_GetRenderOutputSize(renderer, &width, &height);
+    if (!ok) {
+        LOGE("Could not get render output size: %s", SDL_GetError());
+        LOGE("Please report the error");
+        // fatal error
+        abort();
+    }
+
+    struct sc_size size = {
+        .width = width,
+        .height = height,
+    };
+    return size;
+}
+
 bool
 sc_sdl_render_clear(SDL_Renderer *renderer) {
     bool ok = SDL_RenderClear(renderer);
diff --git a/app/src/util/sdl.h b/app/src/util/sdl.h
index 78b8319e..bdd748c2 100644
--- a/app/src/util/sdl.h
+++ b/app/src/util/sdl.h
@@ -34,6 +34,9 @@ sc_sdl_show_window(SDL_Window *window);
 void
 sc_sdl_hide_window(SDL_Window *window);
 
+struct sc_size
+sc_sdl_get_render_output_size(SDL_Renderer *renderer);
+
 bool
 sc_sdl_render_clear(SDL_Renderer *renderer);