From 59d5e1b5b8d55fa88b9b8c3912fc9b2a7fc8257a Mon Sep 17 00:00:00 2001
From: Leon Styhre <leon@leonstyhre.com>
Date: Tue, 13 Dec 2022 22:45:05 +0100
Subject: [PATCH] Changed the color channel mix for grayscale conversions.

---
 resources/shaders/glsl/core.glsl      | 4 ++--
 resources/shaders/glsl/scanlines.glsl | 2 +-
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/resources/shaders/glsl/core.glsl b/resources/shaders/glsl/core.glsl
index 2bcd22374..b918fe969 100644
--- a/resources/shaders/glsl/core.glsl
+++ b/resources/shaders/glsl/core.glsl
@@ -75,9 +75,9 @@ void main()
         vec3 grayscale;
         // Premultiplied textures are all in BGRA format.
         if (0x0u != (shaderFlags & 0x01u))
-            grayscale = vec3(dot(sampledColor.bgr, vec3(0.0721, 0.7154, 0.2125)));
+            grayscale = vec3(dot(sampledColor.bgr, vec3(0.114, 0.587, 0.299)));
         else
-            grayscale = vec3(dot(sampledColor.rgb, vec3(0.2125, 0.7154, 0.0721)));
+            grayscale = vec3(dot(sampledColor.rgb, vec3(0.299, 0.587, 0.114)));
         vec3 blendedColor = mix(grayscale, sampledColor.rgb, saturation);
         sampledColor = vec4(blendedColor, sampledColor.a);
     }
diff --git a/resources/shaders/glsl/scanlines.glsl b/resources/shaders/glsl/scanlines.glsl
index cbc2cb60b..2be2e9b71 100644
--- a/resources/shaders/glsl/scanlines.glsl
+++ b/resources/shaders/glsl/scanlines.glsl
@@ -158,7 +158,7 @@ void main()
     // Saturation.
     if (saturation != 1.0) {
         vec3 grayscale;
-        grayscale = vec3(dot(colorTemp.bgr, vec3(0.0721, 0.7154, 0.2125)));
+        grayscale = vec3(dot(colorTemp.bgr, vec3(0.114, 0.587, 0.299)));
         vec3 blendedColor = mix(grayscale, colorTemp.rgb, saturation);
         colorTemp = vec4(blendedColor, colorTemp.a);
     }