From de30ef14ae8506896144009d44bcf0ba8ed95a48 Mon Sep 17 00:00:00 2001
From: Yuxuan Shui <yshuiv7@gmail.com>
Date: Tue, 5 Mar 2019 20:27:01 +0000
Subject: [PATCH] backend: move the head of the damage ring after paint

Signed-off-by: Yuxuan Shui <yshuiv7@gmail.com>
---
 src/backend/backend.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/src/backend/backend.c b/src/backend/backend.c
index ee8682d..d3b4ed5 100644
--- a/src/backend/backend.c
+++ b/src/backend/backend.c
@@ -229,6 +229,14 @@ void paint_all_new(session_t *ps, win *const t, bool ignore_damage) {
 		pixman_region32_fini(&reg_bound);
 		pixman_region32_fini(&reg_paint);
 	}
+	pixman_region32_fini(&reg_damage);
+
+	// Move the head of the damage ring
+	ps->damage = ps->damage - 1;
+	if (ps->damage < ps->damage_ring) {
+		ps->damage = ps->damage_ring + ps->ndamage - 1;
+	}
+	pixman_region32_clear(ps->damage);
 
 	if (ps->backend_data->ops->present) {
 		// Present the rendered scene