diff --git a/CMakeLists.txt b/CMakeLists.txt
index 9516207..3a7a1a4 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -48,6 +48,7 @@ target_link_libraries(${PROJECT_NAME} PUBLIC
 
 install(FILES
 		${CMAKE_CURRENT_BINARY_DIR}/engine_build_config.h
+		include/aliases.h
 		include/constants.h
 		include/GameEngine.h
 		include/Window.h
diff --git a/include/GameEngine.h b/include/GameEngine.h
index 19da54e..5c4ac72 100644
--- a/include/GameEngine.h
+++ b/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);
diff --git a/include/Renderer.h b/include/Renderer.h
index 75631eb..dc648f8 100644
--- a/include/Renderer.h
+++ b/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,
diff --git a/include/aliases.h b/include/aliases.h
new file mode 100644
index 0000000..50a6b8c
--- /dev/null
+++ b/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
diff --git a/include/constants.h b/include/constants.h
index 40085b7..04c9d8e 100644
--- a/include/constants.h
+++ b/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
diff --git a/src/GameEngine.c b/src/GameEngine.c
index 48c911e..7e0fa14 100644
--- a/src/GameEngine.c
+++ b/src/GameEngine.c
@@ -16,6 +16,7 @@
 #include "SDL_ttf.h"
 #include "SDL_video.h"
 #include "Window.h"
+#include "aliases.h"
 #include "constants.h"
 #include "engine_build_config.h"
 #include "reusable_ids.h"
@@ -213,12 +214,17 @@ WindowDrawingArea get_window_drawing_area() {
   return GameEngine.window.drawing_area;
 }
 
+void draw_rectangle(RenderRect rect, SDL_Color color) {
+  draw_rect(GameEngine.window.renderer, color, rect.x, rect.y, rect.width,
+            rect.height);
+}
+
 void fill_rectangle(RenderRect rect, SDL_Color color) {
   fill_rect(GameEngine.window.renderer, color, rect.x, rect.y, rect.width,
             rect.height);
 }
 
-void clip_source_rect_to_drawing_area(RenderRect *src, RenderRect *dest) {
+void clip_render_rects_to_drawing_area(RenderRect *src, RenderRect *dest) {
   WindowDrawingArea area = get_window_drawing_area();
 
   // If the rectangle is completely out of bounds, set its width and height to 0
@@ -256,14 +262,16 @@ void clip_source_rect_to_drawing_area(RenderRect *src, RenderRect *dest) {
     y_clip = (dest->y + dest->height) - (area.y + area.height);
   }
 
-  // Offset and clipping of source rectangle needs to be calculated based on the
-  // ratio of the x_clip and y_clip variables to the width and height of the
-  // destination rectangle respectively. This is because the source rectangle's
-  // width and height might be different from the destination's
-  src->x += ((x_offset / dest->width) * src->width);
-  src->y += ((y_offset / dest->height) * src->height);
-  src->width *= 1 - (x_clip / dest->width);
-  src->height *= 1 - (y_clip / dest->height);
+  if (src) {
+    // Offset and clipping of source rectangle needs to be calculated based on
+    // the ratio of the x_clip and y_clip variables to the width and height of
+    // the destination rectangle respectively. This is because the source
+    // rectangle's width and height might be different from the destination's
+    src->x += ((x_offset / dest->width) * src->width);
+    src->y += ((y_offset / dest->height) * src->height);
+    src->width *= 1 - (x_clip / dest->width);
+    src->height *= 1 - (y_clip / dest->height);
+  }
 
   dest->x += x_offset;
   dest->y += y_offset;
diff --git a/src/Renderer.c b/src/Renderer.c
index eda2016..1a42c42 100644
--- a/src/Renderer.c
+++ b/src/Renderer.c
@@ -49,6 +49,15 @@ void render_clear(const Renderer *renderer, SDL_Color color) {
   SDL_RenderClear(renderer->SDL_base_renderer);
 }
 
+void draw_rect(const Renderer *renderer, SDL_Color color, float x, float y,
+               float w, float h) {
+  SDL_FRect dest = {x, y, w, h};
+
+  SDL_SetRenderDrawColor(renderer->SDL_base_renderer, color.r, color.g, color.b,
+                         color.a);
+  SDL_RenderDrawRectF(renderer->SDL_base_renderer, &dest);
+}
+
 void fill_rect(const Renderer *renderer, SDL_Color color, float x, float y,
                float w, float h) {
   SDL_FRect dest = {x, y, w, h};