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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 below.
cl_sampler_info Return 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)


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OpenCL Specification
page 130, section 5.5.2 - Sampler Object Queries
01/14/2021 The Khronos Group