Added API functions for modulating the colour and alpha of a texture

include/Renderer.h

@@ -7,6 +7,7 @@
 #include "SDL_surface.h"
 #include "SDL_video.h"
 #include "aliases.h"
+#include <aliases.h>
 #include <stdbool.h>
 
 #ifdef __cplusplus
@@ -43,6 +44,8 @@ Renderer *create_renderer(SDL_Window *window);
 void get_render_output_size(Renderer *renderer, i32 *w, i32 *h);
 
 void set_render_draw_color(const Renderer *renderer, SDL_Color color);
+void set_texture_color_modulation(SDL_Texture *texture, SDL_Color color);
+void set_texture_alpha_modulation(SDL_Texture *texture, u8 alpha);
 void render_clear(const Renderer *renderer, SDL_Color color);
 void draw_rect(const Renderer *renderer, SDL_Color color, f32 x, f32 y, f32 w,
                f32 h);