From 8e9184b62e05e60b20fcaa7ed68714c226c24a40 Mon Sep 17 00:00:00 2001
From: Daniel van Vugt <daniel.van.vugt@canonical.com>
Date: Thu, 15 Nov 2018 15:39:34 +0800
Subject: [PATCH] background: Mipmap wallpaper when shrinking

So as to minimize jaggies for wallpaper that is >= double the resolution
of the screen.

Closes: https://gitlab.gnome.org/GNOME/gnome-shell/issues/254
---
 src/compositor/meta-background.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/compositor/meta-background.c b/src/compositor/meta-background.c
index 0fb20d569..4670409aa 100644
--- a/src/compositor/meta-background.c
+++ b/src/compositor/meta-background.c
@@ -629,6 +629,11 @@ create_pipeline (PipelineType type)
       cogl_pipeline_set_blend (templates[type], blend_strings[type], NULL);
     }
 
+  cogl_pipeline_set_layer_filters (templates[type],
+                                   0,
+                                   COGL_PIPELINE_FILTER_LINEAR_MIPMAP_NEAREST,
+                                   COGL_PIPELINE_FILTER_LINEAR);
+
   return cogl_pipeline_copy (templates[type]);
 }