From 4f8aed4149449430575419dd232b1e5856eda1fa Mon Sep 17 00:00:00 2001
From: Victoria Brekenfeld <victoria@system76.com>
Date: Thu, 11 Jun 2026 16:41:04 +0200
Subject: [PATCH] blur: Fix invalid matrix inversions

---
 src/backend/render/wayland/blur_effect.rs | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/src/backend/render/wayland/blur_effect.rs b/src/backend/render/wayland/blur_effect.rs
index 3cf8ea9e..243cd510 100644
--- a/src/backend/render/wayland/blur_effect.rs
+++ b/src/backend/render/wayland/blur_effect.rs
@@ -218,7 +218,7 @@ impl BlurElement {
         radii: [u8; 4],
         strength: usize,
     ) -> Result<Option<Self>, R::Error> {
-        if strength == 0 {
+        if strength == 0 || geometry.size.w == 0. || geometry.size.h == 0. {
             return Ok(None);
         }
 
@@ -237,12 +237,10 @@ impl BlurElement {
         };
         let geo_translation = {
             let offset = geo.loc - extended_geo.loc;
-            Matrix3::from_translation(Vector2::new(
+            Matrix3::from_translation(-Vector2::new(
                 (offset.x / extended_geo.size.w) as f32,
                 (offset.y / extended_geo.size.h) as f32,
             ))
-            .invert()
-            .unwrap()
         };
         let input_to_geo = geo_scale * geo_translation;