From 06a6225996b2e21e354d334f89267f05cd8724a4 Mon Sep 17 00:00:00 2001
From: Sam Lantinga <slouken@libsdl.org>
Date: Fri, 11 Oct 2024 15:46:48 -0700
Subject: [PATCH] Fixed conversion from RGB to full range BT.709 YCbCr

This was a typo in the formula. The correct formula is as listed on https://en.wikipedia.org/wiki/YCbCr.

Without this change, white comes out as 253,255,255.
---
 src/rendervulkan.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/rendervulkan.cpp b/src/rendervulkan.cpp
index 03aa5a2af..54d7608dd 100644
--- a/src/rendervulkan.cpp
+++ b/src/rendervulkan.cpp
@@ -78,7 +78,7 @@ static constexpr mat3x4 g_rgb2yuv_srgb_to_bt709_limited = {{
 static constexpr mat3x4 g_rgb2yuv_srgb_to_bt709_full = {{
   { 0.2126f, 0.7152f, 0.0722f, 0.0f },
   { -0.1146f, -0.3854f, 0.5000f, 0.5f },
-  { 0.5000f, -0.4542f, -0.0468f, 0.5f },
+  { 0.5000f, -0.4542f, -0.0458f, 0.5f },
 }};
 
 static const mat3x4& colorspace_to_conversion_from_srgb_matrix(EStreamColorspace colorspace) {