From ed7ec77fddaf1533cf913b8931ccaf767a1e5874 Mon Sep 17 00:00:00 2001
From: itsmattkc <itsmattkc@gmail.com>
Date: Thu, 1 Dec 2022 22:56:51 -0800
Subject: [PATCH] yuv2rgb: scale before centering uv

---
 app/shaders/yuv2rgb.frag | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/app/shaders/yuv2rgb.frag b/app/shaders/yuv2rgb.frag
index 7f0d87a16..49da773b7 100644
--- a/app/shaders/yuv2rgb.frag
+++ b/app/shaders/yuv2rgb.frag
@@ -27,15 +27,17 @@ void main()
     // Convert 0.0-1.0 to -0.5-0.5
     yuv.gb -= (128.0/255.0);
   } else if (bits_per_pixel == 10) {
+    // Scale from 10-bit to 16-bit
+    yuv *= (65535.0/1023.0);
+
     // Convert 0.0-1.0 to -0.5-0.5
     yuv.gb -= (512.0/1023.0);
-
-    yuv *= 64.0;
   } else if (bits_per_pixel == 12) {
+    // Scale from 12-bit to 16-bit
+    yuv *= (65535.0/4095.0);
+
     // Convert 0.0-1.0 to -0.5-0.5
     yuv.gb -= (2048.0/4095.0);
-
-    yuv *= 16.0;
   }
 
   // Convert YUV limited range from 16-235 to 0-255