Added FormatDataType utility function

DirectXTex/DirectXTex.h

@@ -55,6 +55,18 @@ namespace DirectX
 
     size_t __cdecl BitsPerColor(_In_ DXGI_FORMAT fmt) noexcept;
 
+    enum FORMAT_TYPE
+    {
+        FORMAT_TYPE_TYPELESS,
+        FORMAT_TYPE_FLOAT,
+        FORMAT_TYPE_UNORM,
+        FORMAT_TYPE_SNORM,
+        FORMAT_TYPE_UINT,
+        FORMAT_TYPE_SINT,
+    };
+
+    FORMAT_TYPE __cdecl FormatDataType(_In_ DXGI_FORMAT fmt) noexcept;
+
     enum CP_FLAGS : unsigned long
     {
         CP_FLAGS_NONE               = 0x0,      // Normal operation

DirectXTex/DirectXTexConvert.cpp

@@ -5152,3 +5152,33 @@ HRESULT DirectX::ConvertToSinglePlane(
 
     return S_OK;
 }
+
+
+//-------------------------------------------------------------------------------------
+// Returns the data type of a DXGI_FORMAT
+//-------------------------------------------------------------------------------------
+DirectX::FORMAT_TYPE DirectX::FormatDataType(_In_ DXGI_FORMAT fmt) noexcept
+{
+    auto cflags = _GetConvertFlags(fmt);
+
+    switch (cflags & (CONVF_FLOAT | CONVF_UNORM | CONVF_UINT | CONVF_SNORM | CONVF_SINT))
+    {
+    case CONVF_FLOAT:
+        return FORMAT_TYPE_FLOAT;
+
+    case CONVF_UNORM:
+        return FORMAT_TYPE_UNORM;
+
+    case CONVF_UINT:
+        return FORMAT_TYPE_UINT;
+
+    case CONVF_SNORM:
+        return FORMAT_TYPE_SNORM;
+
+    case CONVF_SINT:
+        return FORMAT_TYPE_SINT;
+
+    default:
+        return FORMAT_TYPE_TYPELESS;
+    }
+}