Abstract window and rendere initialisation code

include/window.h

@@ -0,0 +1,52 @@
+#ifndef WINDOW_H
+#define WINDOW_H
+
+#include "SDL_events.h"
+#include "aliases/aliases.h"
+#include "colour.h"
+#include <SDL_render.h>
+#include <SDL_video.h>
+#include <stdbool.h>
+
+#ifndef MAX_HANDLERS_LENGTH
+#define MAX_HANDLERS_LENGTH 128
+#endif // !MAX_HANDLERS_LENGTH
+
+typedef struct window window_t;
+
+typedef void (*event_listener_t)(const window_t *wnd, void *obj,
+                                 const SDL_Event *ev);
+typedef void (*render_func_t)(const window_t *wnd, void *obj);
+
+typedef struct {
+  u64 x;
+  u64 y;
+  u64 width;
+  u64 height;
+} render_rect_t;
+
+struct window {
+  u64 width;
+  u64 height;
+  SDL_Window *window;
+  SDL_Renderer *renderer;
+  colour_t bg_colour;
+  bool running;
+  SDL_Event event;
+  u64 count;
+  void *objects[MAX_HANDLERS_LENGTH];
+  event_listener_t listeners[MAX_HANDLERS_LENGTH];
+  render_func_t render_funcs[MAX_HANDLERS_LENGTH];
+};
+
+bool open_window(window_t *wnd, const char *title, u64 w, u64 h,
+                 colour_t bg_colour);
+void run_window_loop(window_t *wnd);
+void close_window(window_t *wnd);
+bool add_event_listener(window_t *wnd, void *obj, event_listener_t listener);
+bool add_renderer_func(window_t *wnd, void *obj, render_func_t func);
+void fill_rect(const window_t *wnd, const render_rect_t *rect, colour_t colour);
+void draw_rect(const window_t *wnd, const render_rect_t *rect, colour_t colour);
+bool aabb(u64 x, u64 y, const render_rect_t *rect);
+
+#endif // !WINDOW_H