diff --git a/include/wlr/types/wlr_output.h b/include/wlr/types/wlr_output.h
index 3371dcb5..b70bd19e 100644
--- a/include/wlr/types/wlr_output.h
+++ b/include/wlr/types/wlr_output.h
@@ -64,5 +64,8 @@ void wlr_output_effective_resolution(struct wlr_output *output,
 		int *width, int *height);
 void wlr_output_make_current(struct wlr_output *output);
 void wlr_output_swap_buffers(struct wlr_output *output);
+void wlr_output_set_gamma(struct wlr_output *output,
+	uint16_t size, uint16_t *r, uint16_t *g, uint16_t *b);
+uint16_t wlr_output_get_gamma_size(struct wlr_output *output);
 
 #endif
diff --git a/types/wlr_gamma_control.c b/types/wlr_gamma_control.c
index a6520802..d140259e 100644
--- a/types/wlr_gamma_control.c
+++ b/types/wlr_gamma_control.c
@@ -2,11 +2,11 @@
 #include <stdlib.h>
 #include <wayland-server.h>
 #include <wlr/types/wlr_gamma_control.h>
+#include <wlr/types/wlr_output.h>
 #include <wlr/util/log.h>
 #include "gamma-control-protocol.h"
 
 static void resource_destroy(struct wl_client *client, struct wl_resource *resource) {
-	// TODO: we probably need to do more than this
 	wl_resource_destroy(resource);
 }
 
@@ -18,7 +18,17 @@ static void gamma_control_destroy(struct wl_resource *resource) {
 static void gamma_control_set_gamma(struct wl_client *client,
 		struct wl_resource *_gamma_control, struct wl_array *red,
 		struct wl_array *green, struct wl_array *blue) {
-	// TODO
+	if (red->size != green->size || red->size != blue->size) {
+		wl_resource_post_error(_gamma_control, GAMMA_CONTROL_ERROR_INVALID_GAMMA,
+			"The gamma ramps don't have the same size");
+		return;
+	}
+	uint16_t *r = (uint16_t *)red->data;
+	uint16_t *g = (uint16_t *)green->data;
+	uint16_t *b = (uint16_t *)blue->data;
+	struct wlr_gamma_control *gamma_control = wl_resource_get_user_data(_gamma_control);
+	struct wlr_output *output = wl_resource_get_user_data(gamma_control->output);
+	wlr_output_set_gamma(output, red->size / sizeof(uint16_t), r, g, b);
 }
 
 static void gamma_control_reset_gamma(struct wl_client *client,
@@ -37,6 +47,7 @@ static void gamma_control_manager_get_gamma_control(struct wl_client *client,
 		struct wl_resource *_output) {
 	//struct wlr_gamma_control_manager *gamma_control_manager =
 	//	wl_resource_get_user_data(_gamma_control_manager);
+	struct wlr_output *output = wl_resource_get_user_data(_output);
 	struct wlr_gamma_control *gamma_control;
 	if (!(gamma_control = calloc(1, sizeof(struct wlr_gamma_control)))) {
 		return;
@@ -47,6 +58,7 @@ static void gamma_control_manager_get_gamma_control(struct wl_client *client,
 	wlr_log(L_DEBUG, "new gamma_control %p (res %p)", gamma_control, gamma_control->resource);
 	wl_resource_set_implementation(gamma_control->resource,
 		&gamma_control_implementation, gamma_control, gamma_control_destroy);
+	gamma_control_send_gamma_size(_gamma_control_manager, wlr_output_get_gamma_size(output));
 }
 
 static struct gamma_control_manager_interface gamma_control_manager_impl = {
diff --git a/types/wlr_output.c b/types/wlr_output.c
index ee050dc4..1d9fb8fc 100644
--- a/types/wlr_output.c
+++ b/types/wlr_output.c
@@ -223,3 +223,13 @@ void wlr_output_swap_buffers(struct wlr_output *output) {
 
 	output->impl->swap_buffers(output);
 }
+
+void wlr_output_set_gamma(struct wlr_output *output,
+	uint16_t size, uint16_t *r, uint16_t *g, uint16_t *b) {
+	// TODO
+}
+
+uint16_t wlr_output_get_gamma_size(struct wlr_output *output) {
+	// TODO
+	return 0;
+}