From b4719fa58c5aacb77f1fad4041b28b71df4ed94a Mon Sep 17 00:00:00 2001
From: Chuck Walbourn <walbourn@users.noreply.github.com>
Date: Fri, 10 Mar 2023 15:19:09 -0800
Subject: [PATCH] Fix handling of SRGB_IN and SRGB_OUT for GPU BC7 compressor
 (#326)

---
 DirectXTex/DirectXTexCompressGPU.cpp | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/DirectXTex/DirectXTexCompressGPU.cpp b/DirectXTex/DirectXTexCompressGPU.cpp
index fb9d84d..019aeda 100644
--- a/DirectXTex/DirectXTexCompressGPU.cpp
+++ b/DirectXTex/DirectXTexCompressGPU.cpp
@@ -154,9 +154,14 @@ namespace
 
         assert(srcImage.pixels && destImage.pixels);
 
-        const DXGI_FORMAT format = gpubc->GetSourceFormat();
+        DXGI_FORMAT tformat = gpubc->GetSourceFormat();
+        if (compress & TEX_COMPRESS_SRGB_OUT)
+        {
+            tformat = MakeSRGB(tformat);
+        }
+        const DXGI_FORMAT sformat = (compress & TEX_COMPRESS_SRGB_IN) ? MakeSRGB(srcImage.format) : srcImage.format;
 
-        if (srcImage.format == format)
+        if (sformat == tformat)
         {
             // Input is already in our required source format
             return gpubc->Compress(srcImage, destImage);
@@ -169,7 +174,7 @@ namespace
 
             auto const srgb = GetSRGBFlags(compress);
 
-            switch (format)
+            switch (tformat)
             {
             case DXGI_FORMAT_R8G8B8A8_UNORM:
                 hr = ConvertToRGBA32(srcImage, image, false, srgb);