How can I get the full fft coefficients by cufft?

Accelerated Computing GPU-Accelerated Libraries
1

I am doing two dimensional fft process by cufft. Processing type is real to complex, so the size of out array is NX * (NY / 2 + 1) which is non redundant. But I need the full coefficients containing the redundant ones. How can i get them all? Thanks in advance.