From c0454ff101f04f84dc57b3baf46de4ba15088a90 Mon Sep 17 00:00:00 2001
From: Thomas Harte <thomas.harte@gmail.com>
Date: Thu, 22 Nov 2018 18:18:16 -0500
Subject: [PATCH] Corrects chrominance scale.

---
 Outputs/OpenGL/ScanTargetGLSLFragments.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Outputs/OpenGL/ScanTargetGLSLFragments.cpp b/Outputs/OpenGL/ScanTargetGLSLFragments.cpp
index 3dc89173e..cedf3b24e 100644
--- a/Outputs/OpenGL/ScanTargetGLSLFragments.cpp
+++ b/Outputs/OpenGL/ScanTargetGLSLFragments.cpp
@@ -234,7 +234,7 @@ std::unique_ptr<Shader> ScanTarget::input_shader(InputDataType input_data_type,
 
 		// If the output type isn't SVideo, add an SVideo to composite step.
 		if(computed_display_type != DisplayType::SVideo) {
-			fragment_shader += "fragColour = vec4(vec3(mix(fragColour.r,fragColour.g, compositeAmplitudeOut)), 1.0);";
+			fragment_shader += "fragColour = vec4(vec3(mix(fragColour.r, 2.0*(fragColour.g - 0.5), compositeAmplitudeOut)), 1.0);";
 		}
 	}