bool init_gfx();
void destroy_gfx();
-unsigned char* get_framebuffer();
+unsigned char *get_framebuffer();
Rect get_screen_size();
int get_color_depth();
void clear_screen(int r, int g, int b);
+void fill_rect(const Rect &rect, int r, int g, int b);
void set_cursor_visibility(bool visible);