Pass frame damage to renderer via image struct

include/renderer.h

@@ -24,6 +24,7 @@ struct image {
 	int width, height, stride;
 	uint32_t format;
 	void* pixels;	
+	struct pixman_region16* damage;
 };
 
 void render_image(struct buffer* dst, const struct image* src, double scale,

src/main.c

@@ -288,6 +288,7 @@ static void window_transfer_pixels(struct window* w)
 		.stride = vnc_client_get_stride(w->vnc),
 		// TODO: Get the format from the vnc module
 		.format = w->back_buffer->format,
+		.damage = &w->vnc->damage,
 	};
 
 	if (have_egl)