diff options
| -rw-r--r-- | types/wlr_output_damage.c | 23 |
1 files changed, 18 insertions, 5 deletions
diff --git a/types/wlr_output_damage.c b/types/wlr_output_damage.c index a129cec8..fe35b563 100644 --- a/types/wlr_output_damage.c +++ b/types/wlr_output_damage.c @@ -59,12 +59,25 @@ static void output_handle_commit(struct wl_listener *listener, void *data) { return; } - // same as decrementing, but works on unsigned integers - output_damage->previous_idx += WLR_OUTPUT_DAMAGE_PREVIOUS_LEN - 1; - output_damage->previous_idx %= WLR_OUTPUT_DAMAGE_PREVIOUS_LEN; + pixman_region32_t *prev; + switch (output_damage->output->pending.buffer_type) { + case WLR_OUTPUT_STATE_BUFFER_RENDER: + // render-buffers have been swapped, rotate the damage + + // same as decrementing, but works on unsigned integers + output_damage->previous_idx += WLR_OUTPUT_DAMAGE_PREVIOUS_LEN - 1; + output_damage->previous_idx %= WLR_OUTPUT_DAMAGE_PREVIOUS_LEN; + + prev = &output_damage->previous[output_damage->previous_idx]; + pixman_region32_copy(prev, &output_damage->current); + break; + case WLR_OUTPUT_STATE_BUFFER_SCANOUT: + // accumulate render-buffer damage + prev = &output_damage->previous[output_damage->previous_idx]; + pixman_region32_union(prev, prev, &output_damage->current); + break; + } - pixman_region32_copy(&output_damage->previous[output_damage->previous_idx], - &output_damage->current); pixman_region32_clear(&output_damage->current); } |