sampler_properties specifies a list of sampler property names and their
corresponding values. Each sampler property name is immediately followed
by the corresponding desired value. The list is terminated with 0. The
list of supported properties is described in the Sampler Properties table.
If a supported property and its value is not specified in sampler_properties,
its default value will be used. sampler_properties can be NULL in which
case the default values for supported sampler properties will be used.