Added ability to draw a non-filled rectangle

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

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

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
+  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;

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};