From 81863349bfc7fede772eac9b6fd8024f49380e42 Mon Sep 17 00:00:00 2001
From: Andreas Grois <andi@grois.info>
Date: Thu, 22 Mar 2018 23:23:30 +0100
Subject: Make preview use color scale and gamma

---
 BuddhaTest/Shaders/BuddhaFragment.glsl | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

(limited to 'BuddhaTest/Shaders/BuddhaFragment.glsl')

diff --git a/BuddhaTest/Shaders/BuddhaFragment.glsl b/BuddhaTest/Shaders/BuddhaFragment.glsl
index 73cb53e..52a0354 100644
--- a/BuddhaTest/Shaders/BuddhaFragment.glsl
+++ b/BuddhaTest/Shaders/BuddhaFragment.glsl
@@ -15,6 +15,8 @@ layout(std430, binding=3) restrict readonly buffer brightnessData
 
 uniform uint width;
 uniform uint height;
+uniform float gamma;
+uniform float colorScale;
 
 uvec3 getColorAt(vec2 fragCoord)
 {
@@ -27,6 +29,6 @@ uvec3 getColorAt(vec2 fragCoord)
 void main(){
     uvec3 totalCount = getColorAt(uv);
 
-    vec3 scaled = vec3(totalCount)/max(float(brightness),1.0);
+    vec3 scaled = pow(min(vec3(1.0),colorScale*vec3(totalCount)/max(float(brightness),1.0)),vec3(gamma));
     color = scaled;
 }
-- 
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