Add wrappers for SDL functions and structs

src/wrappers/sdl/rect.cppm

@@ -0,0 +1,42 @@
+module;
+
+#include <SDL3/SDL.h>
+
+export module wrappers.sdl.rect;
+
+export namespace sdl
+{
+    // Wrappers around SDL_Point and SDL_FPoint (change to wrapper classes when needed)
+    using FPoint = SDL_FPoint;
+    using Point = SDL_Point;
+
+    /**
+     * Wrapper around SDL_FRect using class inheritance.
+     */
+    class FRect : public SDL_FRect
+    {
+        /**
+         * Wrapper around SDL_RectEmptyFloat().
+         * @return True if the floating point rectangle takes no space.
+         */
+        constexpr bool is_empty() const
+        {
+            return SDL_RectEmptyFloat(this);
+        }
+    };
+
+    /**
+     * Wrapper around SDL_Rect using class inheritance.
+     */
+    class Rect : public SDL_Rect
+    {
+        /**
+         * Wrapper around SDL_RectEmpty().
+         * @return True if the rectangle takes no space.
+         */
+        constexpr bool is_empty() const
+        {
+            return SDL_RectEmpty(this);
+        }
+    };
+}