Add layer effect option to ignore transparent regions when blurring (#159)

1 files changed, 6 insertions, 1 deletions

diff --git a/sway/desktop/fx_renderer/shaders/tex.frag b/sway/desktop/fx_renderer/shaders/tex.frag
index 817b838c..77501887 100644
--- a/sway/desktop/fx_renderer/shaders/tex.frag
+++ b/sway/desktop/fx_renderer/shaders/tex.frag
@@ -26,8 +26,9 @@ uniform vec4 dim_color;
 uniform vec2 size;
 uniform vec2 position;
 uniform float radius;
-uniform bool has_titlebar;
 uniform float saturation;
+uniform bool has_titlebar;
+uniform bool discard_transparent;
 
 const vec3 saturation_weight = vec3(0.2125, 0.7154, 0.0721);
 
@@ -59,4 +60,8 @@ void main() {
             gl_FragColor = mix(vec4(0), gl_FragColor, smooth);
         }
     }
+
+    if (discard_transparent && gl_FragColor.a == 0.0) {
+        discard;
+    }
 }