Add an adaptive_sync output command

This enables/disables adaptive synchronization on the output.

For now, the default is disabled because it might cause flickering on
some hardware if clients don't submit frames at regular enough
intervals. In the future an "auto" option will only enable adaptive sync
if a fullscreen client opts-in via a Wayland protocol.

2 files changed, 2 insertions, 0 deletions

diff --git a/include/sway/commands.h b/include/sway/commands.h
index f992b441..bbbdfc80 100644
--- a/include/sway/commands.h
+++ b/include/sway/commands.h
@@ -266,6 +266,7 @@ sway_cmd input_cmd_xkb_rules;
 sway_cmd input_cmd_xkb_switch_layout;
 sway_cmd input_cmd_xkb_variant;
 
+sway_cmd output_cmd_adaptive_sync;
 sway_cmd output_cmd_background;
 sway_cmd output_cmd_disable;
 sway_cmd output_cmd_dpms;
diff --git a/include/sway/config.h b/include/sway/config.h
index aef6694d..0a2661dd 100644
--- a/include/sway/config.h
+++ b/include/sway/config.h
@@ -238,6 +238,7 @@ struct output_config {
         int32_t transform;
         enum wl_output_subpixel subpixel;
         int max_render_time; // In milliseconds
+        int adaptive_sync;
 
         char *background;
         char *background_option;