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       clGetSamplerInfo - Returns information about the sampler object.

       cl_int clGetSamplerInfo(cl_sampler sampler, cl_sampler_info param_name,
                               size_t param_value_size, void *param_value,
                               size_t *param_value_size_ret);


           Specifies the sampler being queried.

           Specifies the information to query. The list of supported param_name types and the
           information returned in param_value by clGetSamplerInfo is described in the table

           │cl_sampler_infoReturn Type and Info. returned   │
           │                             │ in param_value                   │
           │CL_SAMPLER_REFERENCE_COUNT   │ Return type: cl_uint             │
           │                             │                                  │
           │                             │ Return the sampler reference     │
           │                             │ count. The reference count       │
           │                             │ returned should be considered    │
           │                             │ immediately stale. It is         │
           │                             │ unsuitable for general use in    │
           │                             │ applications. This feature is    │
           │                             │ provided for identifying memory  │
           │                             │ leaks.                           │
           │CL_SAMPLER_CONTEXT           │ Return type: cl_context          │
           │                             │                                  │
           │                             │ Return the context specified     │
           │                             │ when the sampler is created.     │
           │CL_SAMPLER_NORMALIZED_COORDS │ Return type: cl_bool             │
           │                             │                                  │
           │                             │ Return the normalized coords     │
           │                             │ value associated with sampler.   │
           │CL_SAMPLER_ADDRESSING_MODE   │ Return type: cl_addressing_mode  │
           │                             │                                  │
           │                             │ Return the addressing mode value │
           │                             │ associated with sampler.         │
           │CL_SAMPLER_FILTER_MODE       │ Return type: cl_filter_mode      │
           │                             │                                  │
           │                             │ Return the filter mode value     │
           │                             │ associated with sampler.         │

           A pointer to memory where the appropriate result being queried is returned. If
           param_value is NULL, it is ignored.

           Specifies the size in bytes of memory pointed to by param_value. This size must be ≥
           size of return type as described in the table above.

           Returns the actual size in bytes of data copied to param_value. If
           param_value_size_ret is NULL, it is ignored.


       Returns CL_SUCCESS if the function is executed successfully. Otherwise, it returns one of
       the following errors:

       ·   CL_INVALID_VALUE if param_name is not valid, or if size in bytes specified by
           param_value_size is < size of return type as described in the table above and
           param_value is not NULL

       ·   CL_INVALID_SAMPLER if   sampler is a not a valid sampler object.

       ·   CL_OUT_OF_RESOURCES if there is a failure to allocate resources required by the OpenCL
           implementation on the device.

       ·   CL_OUT_OF_HOST_MEMORY if there is a failure to allocate resources required by the
           OpenCL implementation on the host.


       OpenCL Specification[1]


       clCreateSampler(3clc), clRetainSampler(3clc), clReleaseSampler(3clc)


       The Khronos Group


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        1. OpenCL Specification
           page 130, section 5.5.2 - Sampler Object Queries