From bc3cf3082480ab592f3cf2e77823fcd177b4ef89 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Tur=C3=A1nszki=20J=C3=A1nos?=
 <turanszkij@users.noreply.github.com>
Date: Sat, 22 Feb 2025 12:36:47 +0100
Subject: [PATCH] BC4 texture import: reswizzle to rrr1

---
 WickedEngine/wiResourceManager.cpp | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/WickedEngine/wiResourceManager.cpp b/WickedEngine/wiResourceManager.cpp
index eae9d41163..df9e0f583f 100644
--- a/WickedEngine/wiResourceManager.cpp
+++ b/WickedEngine/wiResourceManager.cpp
@@ -703,7 +703,14 @@ namespace wi
 							break;
 						}
 
-						if (desc.format == Format::BC5_UNORM)
+						if (desc.format == Format::BC4_UNORM || desc.format == Format::BC4_SNORM)
+						{
+							desc.swizzle.r = ComponentSwizzle::R;
+							desc.swizzle.g = ComponentSwizzle::R;
+							desc.swizzle.b = ComponentSwizzle::R;
+							desc.swizzle.a = ComponentSwizzle::ONE;
+						}
+						if (desc.format == Format::BC5_UNORM || desc.format == Format::BC5_SNORM)
 						{
 							desc.swizzle.r = ComponentSwizzle::R;
 							desc.swizzle.g = ComponentSwizzle::G;