From b4c40d7f415f7e18db0946b54cd1b2fd4ef56917 Mon Sep 17 00:00:00 2001
From: Fahad Hasan Pathik <contact.fahadpathik@gmail.com>
Date: Sat, 27 Apr 2019 20:09:06 +0600
Subject: [PATCH] vignette inverse added

---
 effects/shaders/vignette.frag | 8 +++++++-
 effects/shaders/vignette.xml  | 3 +++
 2 files changed, 10 insertions(+), 1 deletion(-)

diff --git a/effects/shaders/vignette.frag b/effects/shaders/vignette.frag
index cf8014b25..ae218dfc8 100644
--- a/effects/shaders/vignette.frag
+++ b/effects/shaders/vignette.frag
@@ -7,6 +7,7 @@ uniform float centerX;
 uniform float centerY;
 uniform bool circular;
 uniform vec2 resolution;
+uniform bool invert;
 // uniform vec2 lensRadius; // 0.45, 0.38
 
 varying vec2 vTexCoord;
@@ -24,6 +25,11 @@ void main(void) {
 	}
 	float dist = distance(vignetteCoord, vec2(0.5 + centerX*0.01, 0.5 + centerY*0.01));
 	float size = (lensRadiusX*0.01);
-	c *= smoothstep(size, size*0.99*(1.0-lensRadiusY*0.01), dist);
+	
+	if (invert)
+	{c *= 1.0 - smoothstep(size, size*0.99*(1.0-lensRadiusY*0.01), dist);}
+	else
+	{c *= smoothstep(size, size*0.99*(1.0-lensRadiusY*0.01), dist);}
+	
 	gl_FragColor = c;
 }
\ No newline at end of file
diff --git a/effects/shaders/vignette.xml b/effects/shaders/vignette.xml
index a85e94be5..849e6393c 100644
--- a/effects/shaders/vignette.xml
+++ b/effects/shaders/vignette.xml
@@ -13,5 +13,8 @@
 		<field type="double" default="0" id="centerX"/>
 		<field type="double" default="0" id="centerY"/>
 	</row>
+	<row name="Invert">
+		<field type="bool" default="0" id="invert"/>
+	</row>
 	<shader vert="common.vert" frag="vignette.frag"/>
 </effect>
\ No newline at end of file