WIC loader special case for PNG with legacy gAMA chunk for sRGB

Src/WICTextureLoader.cpp

@@ -336,12 +336,12 @@ namespace
                 GUID containerFormat;
                 if (SUCCEEDED(metareader->GetContainerFormat(&containerFormat)))
                 {
-                    // Check for sRGB colorspace metadata
                     bool sRGB = false;
 
                     PROPVARIANT value;
                     PropVariantInit(&value);
 
+                    // Check for colorspace chunks
                     if (memcmp(&containerFormat, &GUID_ContainerFormatPng, sizeof(GUID)) == 0)
                     {
                         // Check for sRGB chunk
@@ -349,6 +349,13 @@ namespace
                         {
                             sRGB = true;
                         }
+                        else if (SUCCEEDED(metareader->GetMetadataByName(L"/gAMA/ImageGamma", &value)) && value.vt == VT_UI4)
+                        {
+                            if (value.uintVal == 45455)
+                            {
+                                sRGB = true;
+                            }
+                        }
                     }
                 #if defined(_XBOX_ONE) && defined(_TITLE)
                     else if (memcmp(&containerFormat, &GUID_ContainerFormatJpeg, sizeof(GUID)) == 0)