Function gvr_sys::gvr_buffer_spec_get_size

pub unsafe extern fn gvr_buffer_spec_get_size(spec: *const gvr_buffer_spec)
                                              -> gvr_sizei

Gets the size of the buffer to be created.

@param spec Buffer specification. @return Size of the pixel buffer. The default is equal to the recommended render target size at the time when the specification was created.