backend/drm: allow to pass empty gamma ramp to reset it

1 files changed, 2 insertions, 0 deletions

diff --git a/include/wlr/types/wlr_output.h b/include/wlr/types/wlr_output.h
index e9f3ae3b..3a9f3c41 100644
--- a/include/wlr/types/wlr_output.h
+++ b/include/wlr/types/wlr_output.h
@@ -182,6 +182,8 @@ uint32_t wlr_output_get_gamma_size(struct wlr_output *output);
  * Sets the gamma table for this output. `r`, `g` and `b` are gamma ramps for
  * red, green and blue. `size` is the length of the ramps and must not exceed
  * the value returned by `wlr_output_get_gamma_size`.
+ *
+ * Providing zero-sized ramps resets the gamma table.
  */
 bool wlr_output_set_gamma(struct wlr_output *output,
 	uint32_t size, uint16_t *r, uint16_t *g, uint16_t *b);