From 670d577ad0cd45a0c7bf4a264b791a2cd86557c3 Mon Sep 17 00:00:00 2001
From: Daniel Eklöf <daniel@ekloef.se>
Date: Mon, 3 Jul 2023 12:58:33 +0200
Subject: main: mark surface as opaque

---
 CHANGELOG.md | 4 ++++
 main.c       | 5 +++++
 2 files changed, 9 insertions(+)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 9fb490f..7b1b71c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,6 +6,10 @@
 
 ## Unreleased
 ### Added
+
+* We now hint to the compositor that the background is fully opaque.
+
+
 ### Changed
 ### Deprecated
 ### Removed
diff --git a/main.c b/main.c
index 03a7df6..6e938f0 100644
--- a/main.c
+++ b/main.c
@@ -267,6 +267,11 @@ add_surface_to_output(struct output *output)
     wl_surface_set_input_region(surf, empty_region);
     wl_region_destroy(empty_region);
 
+    /* Surface is fully opaque (i.e. non-transparent) */
+    struct wl_region *opaque_region = wl_compositor_create_region(compositor);
+    wl_surface_set_opaque_region(surf, opaque_region);
+    wl_region_destroy(opaque_region);
+
     struct zwlr_layer_surface_v1 *layer = zwlr_layer_shell_v1_get_layer_surface(
         layer_shell, surf, output->wl_output,
         ZWLR_LAYER_SHELL_V1_LAYER_BACKGROUND, "wallpaper");
-- 
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