From 7e91f911ca901437e043e9b928aa3d64a3e7593a Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Jean-Micha=C3=ABl=20Celerier?=
 <jeanmichael.celerier+github@gmail.com>
Date: Sun, 4 Feb 2024 20:45:20 -0500
Subject: [PATCH] Circle Warp.fs: fix uninitialized value causing garbage on
 some drivers

e.g. on linux with Mesa, inputPixelColor being uninitialized causes a garbled background around the circle.
---
 ISF/Circle Warp.fs | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/ISF/Circle Warp.fs b/ISF/Circle Warp.fs
index 9462fa5..f3aff39 100644
--- a/ISF/Circle Warp.fs	
+++ b/ISF/Circle Warp.fs	
@@ -72,6 +72,8 @@ void main()	{
 		pt.y /= 2.0*sqrt(pow(radius,2.0)-pow((pt.x-0.5),2.0));
 		pt.y += 0.5;
 		inputPixelColor = IMG_NORM_PIXEL(inputImage,pt);
+	} else {
+		inputPixelColor = vec4(0.0);
 	}
 	
 	gl_FragColor = inputPixelColor;