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-rw-r--r--include/wlr/types/wlr_output.h5
1 files changed, 4 insertions, 1 deletions
diff --git a/include/wlr/types/wlr_output.h b/include/wlr/types/wlr_output.h
index 6d38152a..22822b11 100644
--- a/include/wlr/types/wlr_output.h
+++ b/include/wlr/types/wlr_output.h
@@ -121,7 +121,7 @@ struct wlr_output {
struct wlr_output_event_swap_buffers {
struct wlr_output *output;
struct timespec *when;
- pixman_region32_t *damage;
+ pixman_region32_t *damage; // output-buffer-local coordinates
};
enum wlr_output_present_flag {
@@ -203,6 +203,9 @@ bool wlr_output_preferred_read_format(struct wlr_output *output,
* NULL. If the compositor doesn't support damage tracking, set `damage` to
* NULL.
*
+ * Damage is given in output-buffer-local coordinates (ie. scaled and
+ * transformed).
+ *
* Swapping buffers schedules a `frame` event.
*/
bool wlr_output_swap_buffers(struct wlr_output *output, struct timespec *when,