clGetImageInfo

Enqueues a command to map a region of a buffer object into the host address space and returns a pointer to this mapped region.

cl_int * clGetImageInfo ( cl_mem image,
  cl_image_info param_name,
  size_t param_value_size,
  void *param_value,
  size_t *param_value_size_ret)

Parameters

image

Specifies the image object being queried.

param_name

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

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

Used to specify the size in bytes of memory pointed to by param_value. This size must be greater than or equal to size of return type as described in the table below.

cl_image_info Return Type Info. returned in param_value
CL_IMAGE_FORMAT cl_image_format Return image format descriptor specified when image is created with clCreateImage2D or clCreateImage3D.
CL_IMAGE_ELEMENT_SIZE size_t Return size of each element of the image memory object given by image. An element is made up of n channels. The value of n is given in cl_image_format descriptor.
CL_IMAGE_ROW_PITCH size_t Return size in bytes of a row of elements of the image object given by image.
CL_IMAGE_SLICE_PITCH size_t Return size in bytes of a 2D slice for the 3D image object given by image. For a 2D image object this value will be 0.
CL_IMAGE_WIDTH size_t Return width of image in pixels.
CL_IMAGE_HEIGHT size_t Return height of image in pixels.
CL_IMAGE_DEPTH size_t Return depth of the image in pixels. For a 2D image, depth equals 0.
param_value_size_ret

the actual size in bytes of data being queried by param_value. If param_value_size_ret is NULL, it is ignored.

Errors

clGetImageInfo returns CL_SUCCESS if the function is executed successfully, returns CL_INVALID_VALUE if param_name is not valid, or if size in bytes specified by param_value_size is less than the size of return type as described in the table above and param_value is not NULL, and returns CL_INVALID_MEM_OBJECT if image is a not a valid image object.

Specification

OpenCL Specification

Also see

clGetMemObjectInfo

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