From bc1aecbcf8af933ba0b887a5205b382c392aa226 Mon Sep 17 00:00:00 2001
From: Chuck Walbourn <chuckw@microsoft.com>
Date: Wed, 6 Apr 2022 00:00:46 -0700
Subject: [PATCH] Avoid WIC bitmap scalar for box/fant/point resizing for > 8
 bpc HDR/XR formats

---
 DirectXTex/DirectXTexMipmaps.cpp | 8 ++++++++
 DirectXTex/DirectXTexResize.cpp  | 8 ++++++++
 2 files changed, 16 insertions(+)

diff --git a/DirectXTex/DirectXTexMipmaps.cpp b/DirectXTex/DirectXTexMipmaps.cpp
index 1a401ce..c1d9ce8 100644
--- a/DirectXTex/DirectXTexMipmaps.cpp
+++ b/DirectXTex/DirectXTexMipmaps.cpp
@@ -686,6 +686,14 @@ namespace
         case TEX_FILTER_TRIANGLE:
             // WIC does not implement this filter
             return false;
+
+        default:
+            if (BitsPerColor(format) > 8)
+            {
+                // Avoid the WIC bitmap scaler when doing filtering of XR/HDR formats
+                return false;
+            }
+            break;
         }
 
         return true;
diff --git a/DirectXTex/DirectXTexResize.cpp b/DirectXTex/DirectXTexResize.cpp
index a44eedb..0723a08 100644
--- a/DirectXTex/DirectXTexResize.cpp
+++ b/DirectXTex/DirectXTexResize.cpp
@@ -233,6 +233,14 @@ namespace
         case TEX_FILTER_TRIANGLE:
             // WIC does not implement this filter
             return false;
+
+        default:
+            if (BitsPerColor(format) > 8)
+            {
+                // Avoid the WIC bitmap scaler when doing filtering of XR/HDR formats
+                return false;
+            }
+            break;
         }
 
         return true;