clGetSamplerInfo
clGetSamplerInfo
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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

## Parameters

`sampler`

  Specifies the sampler being queried.

`param_name`

  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`.

`param_value`

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

`param_value_size`

  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.

`param_value_size_ret`

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

## Errors

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.

## Specification

OpenCL Specification

## Also see

clCreateSampler, clRetainSampler, clReleaseSampler

##