public static extern int DirectXTex_ScratchImageGetRawBytes( DirectXTexScratchImage image, uint arrayIndex, uint mip, uint slice, out DirectXTexBlob outBlob);
public static extern int DirectXTex_BlobFree( DirectXTexBlob blob);
public static extern int DirectXTex_BlobGetBuffer( DirectXTexBlob blob, out IntPtr bufferPointer, out uint bufferSize);
public static extern int DirectXTex_BlobNew( out DirectXTexBlob outBlob);