Added ability to draw a non-filled rectangle

include/GameEngine.h

@@ -61,13 +61,14 @@ WindowSize get_window_real_size();
  */
 WindowDrawingArea get_window_drawing_area();
 
+void draw_rectangle(RenderRect rect, SDL_Color color);
 void fill_rectangle(RenderRect rect, SDL_Color color);
 
 /**
  * Ensures that a rendered rectangle is clipped to the drawing area when it is
  * smaller than the actual size of the window.
  */
-void clip_source_rect_to_drawing_area(RenderRect *src, RenderRect *dest);
+void clip_render_rects_to_drawing_area(RenderRect *src, RenderRect *dest);
 
 RenderRect get_texture_asset_rect(AssetID id);
 void render_texture_asset(AssetID id, RenderRect *src, RenderRect *dest);

include/Renderer.h

@@ -37,6 +37,8 @@ Renderer *create_renderer(SDL_Window *window);
 void get_render_output_size(Renderer *renderer, int32_t *w, int32_t *h);
 
 void render_clear(const Renderer *renderer, SDL_Color color);
+void draw_rect(const Renderer *renderer, SDL_Color color, float x, float y,
+               float w, float h);
 void fill_rect(const Renderer *renderer, SDL_Color color, float x, float y,
                float w, float h);
 void render_surface(const Renderer *renderer, SDL_Surface *surface,

include/aliases.h

@@ -0,0 +1,14 @@
+#ifndef ALIASES_H
+#define ALIASES_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif // !__cplusplus
+
+#define INTERNAL static
+
+#ifdef __cplusplus
+}
+#endif // !__cplusplus
+
+#endif // !ALIASES_H

include/constants.h

@@ -5,8 +5,6 @@
 extern "C" {
 #endif // !__cplusplus
 
-#define INTERNAL static
-
 #define MAX_OBJ_COUNT 10000
 #define MAX_ASSET_COUNT 1000
 #define HASH_PRIME_01 1987