From 9186feca80024e02f070237c8fd95f0e578992fb Mon Sep 17 00:00:00 2001
From: Cameron Gutman <aicommander@gmail.com>
Date: Thu, 22 Aug 2024 01:18:39 -0500
Subject: [PATCH] Slightly simplify Metal shader

---
 app/shaders/vt_renderer.metal | 12 +++++++-----
 1 file changed, 7 insertions(+), 5 deletions(-)

diff --git a/app/shaders/vt_renderer.metal b/app/shaders/vt_renderer.metal
index 5bfb6b6d..d9fa552a 100644
--- a/app/shaders/vt_renderer.metal
+++ b/app/shaders/vt_renderer.metal
@@ -25,8 +25,9 @@ fragment float4 ps_draw_biplanar(Vertex v [[ stage_in ]],
                                  texture2d<float> luminancePlane [[ texture(0) ]],
                                  texture2d<float> chrominancePlane [[ texture(1) ]])
 {
-    float3 yuv = float3(luminancePlane.sample(s, v.texCoords).r * cscParams.bitnessScaleFactor,
-                        chrominancePlane.sample(s, v.texCoords).rg * cscParams.bitnessScaleFactor);
+    float3 yuv = float3(luminancePlane.sample(s, v.texCoords).r,
+                        chrominancePlane.sample(s, v.texCoords).rg);
+    yuv *= cscParams.bitnessScaleFactor;
     yuv -= cscParams.offsets;
 
     float3 rgb;
@@ -42,9 +43,10 @@ fragment float4 ps_draw_triplanar(Vertex v [[ stage_in ]],
                                   texture2d<float> chrominancePlaneU [[ texture(1) ]],
                                   texture2d<float> chrominancePlaneV [[ texture(2) ]])
 {
-    float3 yuv = float3(luminancePlane.sample(s, v.texCoords).r * cscParams.bitnessScaleFactor,
-                        chrominancePlaneU.sample(s, v.texCoords).r * cscParams.bitnessScaleFactor,
-                        chrominancePlaneV.sample(s, v.texCoords).r * cscParams.bitnessScaleFactor);
+    float3 yuv = float3(luminancePlane.sample(s, v.texCoords).r,
+                        chrominancePlaneU.sample(s, v.texCoords).r,
+                        chrominancePlaneV.sample(s, v.texCoords).r);
+    yuv *= cscParams.bitnessScaleFactor;
     yuv -= cscParams.offsets;
 
     float3 rgb;