NAME

       imageDescriptor - The image descriptor structure describes the type and dimensions of the
       image or image array and is defined as:

       typedef struct _cl_image_desc {
       cl_mem_object_type image_type; size_t
       image_width; size_t image_height; size_t
       image_depth; size_t image_array_size; size_t
       image_row_pitch; size_t image_slice_pitch;
       cl_uint num_mip_levels; cl_uint num_samples;
       cl_mem buffer; } cl_image_desc;

MEMBERS

       image_type
           Describes the image type and must be either CL_MEM_OBJECT_IMAGE1D,
           CL_MEM_OBJECT_IMAGE1D_BUFFER, CL_MEM_OBJECT_IMAGE1D_ARRAY, CL_MEM_OBJECT_IMAGE2D,
           CL_MEM_OBJECT_IMAGE2D_ARRAY, or CL_MEM_OBJECT_IMAGE3D.

       image_width
           The width of the image in pixels. For a 2D image and image array, the image width must
           be ≤ CL_DEVICE_IMAGE2D_MAX_WIDTH. For a 3D image, the image width must be ≤
           CL_DEVICE_IMAGE3D_MAX_WIDTH. For a 1D image buffer, the image width must be ≤
           CL_DEVICE_IMAGE_MAX_BUFFER_SIZE. For a 1D image and 1D image array, the image width
           must be ≤ CL_DEVICE_IMAGE2D_MAX_WIDTH.

       image_height
           The height of the image in pixels. This is only used if the image is a 2D, 3D or 2D
           image array. For a 2D image or image array, the image height must be ≤
           CL_DEVICE_IMAGE2D_MAX_HEIGHT. For a 3D image, the image height must be ≤
           CL_DEVICE_IMAGE3D_MAX_HEIGHT.

       image_depth
           The depth of the image in pixels. This is only used if the image is a 3D image and
           must be a value ≥ 1 and ≤ CL_DEVICE_IMAGE3D_MAX_DEPTH.

       image_array_size
           The number of images in the image array. This is only used if the image is a 1D or 2D
           image array. The values for image_array_size, if specified, must be a value ≥ 1 and ≤
           CL_DEVICE_IMAGE_MAX_ARRAY_SIZE.

           Note that reading and writing 2D image arrays from a kernel with image_array_size = 1
           may be lower performance than 2D images.

       image_row_pitch
           The scan-line pitch in bytes. This must be 0 if host_ptr is NULL and can be either 0
           or ≥ image_width * size of element in bytes if host_ptr is not NULL. If host_ptr is
           not NULL and image_row_pitch = 0, image_row_pitch is calculated as image_width * size
           of element in bytes. If image_row_pitch is not 0, it must be a multiple of the image
           element size in bytes.

       image_slice_pitch
           The size in bytes of each 2D slice in the 3D image or the size in bytes of each image
           in a 1D or 2D image array. This must be 0 if host_ptr is NULL. If host_ptr is not
           NULL, image_slice_pitch can be either 0 or ≥ image_row_pitch * image_height for a 2D
           image array or 3D image and can be either 0 or ≥ image_row_pitch for a 1D image array.
           If host_ptr is not NULL and image_slice_pitch = 0, image_slice_pitch is calculated as
           image_row_pitch * image_height for a 2D image array or 3D image and image_row_pitch
           for a 1D image array. If image_slice_pitch is not 0, it must be a multiple of the
           image_row_pitch.

       num_mip_level, num_samples
           , Must be 0.

       buffer
           Refers to a valid buffer memory object if image_type is CL_MEM_OBJECT_IMAGE1D_BUFFER.
           Otherwise it must be NULL. For a 1D image buffer object, the image pixels are taken
           from the buffer object's data store. When the contents of a buffer object's data store
           are modified, those changes are reflected in the contents of the 1D image buffer
           object and vice-versa at corresponding sychronization points. The image_width * size
           of element in bytes must be ≤ size of buffer object data store.

NOTE

       Concurrent reading from, writing to and copying between both a buffer object and 1D image
       buffer object associated with the buffer object is undefined. Only reading from both a
       buffer object and 1D image buffer object associated with the buffer object is defined.

SPECIFICATION

       OpenCL Specification[1]

SEE ALSO

       cl_image_format(3clc)

AUTHORS

       The Khronos Group

COPYRIGHT

       Copyright © 2007-2010 The Khronos Group Inc.
       Permission is hereby granted, free of charge, to any person obtaining a copy of this
       software and/or associated documentation files (the "Materials"), to deal in the Materials
       without restriction, including without limitation the rights to use, copy, modify, merge,
       publish, distribute, sublicense, and/or sell copies of the Materials, and to permit
       persons to whom the Materials are furnished to do so, subject to the condition that this
       copyright notice and permission notice shall be included in all copies or substantial
       portions of the Materials.

NOTES

        1. OpenCL Specification
           page 95, section 5.3.1.2 - Image Descriptor