Handle gamma-control-v1 set_gamma events

References: https://gitlab.freedesktop.org/wlroots/wlroots/-/merge_requests/4046

4 files changed, 36 insertions, 1 deletions

diff --git a/include/sway/output.h b/include/sway/output.h
index f6dc6af2..50d90d25 100644
--- a/include/sway/output.h
+++ b/include/sway/output.h
@@ -57,6 +57,7 @@ struct sway_output {
         uint32_t refresh_nsec;
         int max_render_time; // In milliseconds
         struct wl_event_source *repaint_timer;
+        bool gamma_lut_changed;
 };
 
 struct sway_output_non_desktop {
@@ -187,6 +188,8 @@ enum wlr_direction opposite_direction(enum wlr_direction d);
 
 void handle_output_layout_change(struct wl_listener *listener, void *data);
 
+void handle_gamma_control_set_gamma(struct wl_listener *listener, void *data);
+
 void handle_output_manager_apply(struct wl_listener *listener, void *data);
 
 void handle_output_manager_test(struct wl_listener *listener, void *data);
diff --git a/include/sway/server.h b/include/sway/server.h
index a65843ce..aaa8781b 100644
--- a/include/sway/server.h
+++ b/include/sway/server.h
@@ -91,6 +91,9 @@ struct sway_server {
         struct wl_listener output_manager_apply;
         struct wl_listener output_manager_test;
 
+        struct wlr_gamma_control_manager_v1 *gamma_control_manager_v1;
+        struct wl_listener gamma_control_set_gamma;
+
         struct {
                 bool locked;
                 struct wlr_session_lock_manager_v1 *manager;
diff --git a/sway/desktop/output.c b/sway/desktop/output.c
index 43ce2d70..09353c15 100644
--- a/sway/desktop/output.c
+++ b/sway/desktop/output.c
@@ -9,6 +9,7 @@
 #include <wlr/render/swapchain.h>
 #include <wlr/render/wlr_renderer.h>
 #include <wlr/types/wlr_buffer.h>
+#include <wlr/types/wlr_gamma_control_v1.h>
 #include <wlr/types/wlr_matrix.h>
 #include <wlr/types/wlr_output_layout.h>
 #include <wlr/types/wlr_output.h>
@@ -564,6 +565,7 @@ static int output_repaint_timer_handler(void *data) {
         wlr_output->frame_pending = false;
 
         if (!wlr_output->needs_frame &&
+                        !output->gamma_lut_changed &&
                         !pixman_region32_not_empty(&output->damage_ring.current)) {
                 return 0;
         }
@@ -578,6 +580,19 @@ static int output_repaint_timer_handler(void *data) {
                 fullscreen_con = workspace->current.fullscreen;
         }
 
+        if (output->gamma_lut_changed) {
+                struct wlr_gamma_control_v1 *gamma_control =
+                        wlr_gamma_control_manager_v1_get_control(
+                        server.gamma_control_manager_v1, wlr_output);
+                if (!wlr_gamma_control_v1_apply(gamma_control, &wlr_output->pending)) {
+                        return 0;
+                }
+                if (!wlr_output_test(wlr_output)) {
+                        wlr_output_rollback(wlr_output);
+                        wlr_gamma_control_v1_send_failed_and_destroy(gamma_control);
+                }
+        }
+
         pixman_region32_t frame_damage;
         get_frame_damage(output, &frame_damage);
         wlr_output_set_damage(wlr_output, &frame_damage);
@@ -1076,6 +1091,16 @@ void handle_output_layout_change(struct wl_listener *listener,
         update_output_manager_config(server);
 }
 
+void handle_gamma_control_set_gamma(struct wl_listener *listener, void *data) {
+        struct sway_server *server =
+                wl_container_of(listener, server, gamma_control_set_gamma);
+        const struct wlr_gamma_control_manager_v1_set_gamma_event *event = data;
+
+        struct sway_output *output = event->output->data;
+        output->gamma_lut_changed = true;
+        wlr_output_schedule_frame(output->wlr_output);
+}
+
 static void output_manager_apply(struct sway_server *server,
                 struct wlr_output_configuration_v1 *config, bool test_only) {
         // TODO: perform atomic tests on the whole backend atomically
diff --git a/sway/server.c b/sway/server.c
index c87e30fd..9797cf60 100644
--- a/sway/server.c
+++ b/sway/server.c
@@ -114,7 +114,11 @@ bool server_init(struct sway_server *server) {
         server->data_device_manager =
                 wlr_data_device_manager_create(server->wl_display);
 
-        wlr_gamma_control_manager_v1_create(server->wl_display);
+        server->gamma_control_manager_v1 =
+                wlr_gamma_control_manager_v1_create(server->wl_display);
+        server->gamma_control_set_gamma.notify = handle_gamma_control_set_gamma;
+        wl_signal_add(&server->gamma_control_manager_v1->events.set_gamma,
+                &server->gamma_control_set_gamma);
 
         server->new_output.notify = handle_new_output;
         wl_signal_add(&server->backend->events.new_output, &server->new_output);