From c468d023b01dbabbb1ff9b42319c158bb14937be Mon Sep 17 00:00:00 2001
From: itsmattkc <itsmattkc@gmail.com>
Date: Thu, 28 Mar 2019 13:34:58 +1100
Subject: [PATCH] mathematically calculate gaussian blur radius

---
 effects/shaders/gaussianblur.frag | 4 ++--
 effects/shaders/gaussianblur.xml  | 4 ++--
 2 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/effects/shaders/gaussianblur.frag b/effects/shaders/gaussianblur.frag
index da83e1389..720671d99 100644
--- a/effects/shaders/gaussianblur.frag
+++ b/effects/shaders/gaussianblur.frag
@@ -4,7 +4,7 @@
 
 uniform sampler2D image;
 
-uniform float radius;
+//uniform float radius;
 uniform float sigma;
 uniform vec2 resolution;
 uniform bool horiz_blur;
@@ -22,7 +22,7 @@ float gaussian2(float x, float y, float sigma) {
 }
 
 void main(void) {
-	float rad = ceil(radius);
+	float rad = ceil(3.0 * sigma);
 
 	float sum = 0.0;
 
diff --git a/effects/shaders/gaussianblur.xml b/effects/shaders/gaussianblur.xml
index def19b73e..d0d669f6d 100644
--- a/effects/shaders/gaussianblur.xml
+++ b/effects/shaders/gaussianblur.xml
@@ -1,8 +1,8 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <effect name="Gaussian Blur" category="Blur">
-	<row name="Radius">
+	<!-- <row name="Radius">
 		<field type="double" min="0" default="10" id="radius"/>
-	</row>
+	</row> -->
 	<row name="Sigma">
 		<field type="double" min="0" default="5.5" id="sigma"/>
 	</row>