[mutter] shaped-texture: Remember to turn on mipmapping

[Marge Bot <marge-bot src gnome org>]

commit 5eb5ed54e84d4fb331dcb3ecca560378ca11d012
Author: Daniel van Vugt <daniel van vugt canonical com>
Date:   Wed Jul 27 16:53:46 2022 +0800

    shaped-texture: Remember to turn on mipmapping
    
    It was accidentally lost in 877dc335.
    
    Closes: https://gitlab.gnome.org/GNOME/mutter/-/issues/2365
    Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2537>

 src/compositor/meta-shaped-texture.c | 2 ++
 1 file changed, 2 insertions(+)
---
diff --git a/src/compositor/meta-shaped-texture.c b/src/compositor/meta-shaped-texture.c
index 10e11d57c2..467509d14a 100644
--- a/src/compositor/meta-shaped-texture.c
+++ b/src/compositor/meta-shaped-texture.c
@@ -734,6 +734,8 @@ do_paint_content (MetaShapedTexture   *stex,
           transforms.y_scale < 0.5)
         {
           paint_tex = select_texture_for_paint (stex, paint_context);
+          if (paint_tex != stex->texture)
+            min_filter = COGL_PIPELINE_FILTER_LINEAR_MIPMAP_NEAREST;
         }
     }