Image Read and Write Functions
Click an item in the table below for details about that function.
| read_imagef for 1D and 2D | Do an element lookup in the 1D or 2D image object, returning floating-point values |
| read_image{i|ui} for 1D and 2D | Do an element lookup in the 1D or 2D image object, returning unnormalized signed integer and unsigned integer values |
| read_imageh for 1D and 2D | OPTIONAL function to do an element lookup in the 1D or 2D image object, returning floating-point values. Enabled with cl_khr_fp16. |
| write_image {f|i|ui} for 1D and 2D | Write color value to location in the 1D or 2D image object |
| write_imageh for 1D and 2D | OPTIONAL function to write color value in a 1D or 3D object. Enabled with cl_khr_fp16. |
| read_imagef for 3D | Do an element lookup in the 3D image object, returning floating-point values |
| read_imagei for 3D | Do an element lookup in the 3D image object, returning unnormalized signed integer and unsigned integer values |
| read_imageh for 3D | Do an element lookup in the 3D image object, returning half floating point values. Enabled with cl_khr_fp16. |
| write_imageh for 3D | OPTIONAL function to write color value in a 3D object. Enabled with cl_khr_fp16. |
| write_image{f i ui} for 3D | OPTIONAL function to write color value in a 3D object. Enabled with cl_khr_3d_image_writes. |
| get_image_width | Return the 2D or 3D image width in pixels |
| get_image_height | Return the 2D or 3D image height in pixels. |
| get_image_depth | Return the 3D image depth in pixels |
| get_image_channel_data_type | Return the image channel data type |
| get_image_channel_order | Return the image channel order |
| get_image_dim | Return the image dimensions |
Description
The built-in image function calls to read and write images are supported..
The generic type gentype is used to indicate the built-in data types char, uchar, short, ushort, int, uint, long, ulong, or float.
The generic type name gentypen is used to indicate the built-in data types char{2|4|8|16}, uchar{2|4|8|16}, short{2|4|8|16}, ushort{2|4|8|16}, int{2|4|8|16}, uint{2|4|8|16}, long{2|4|8|16}, ulong{2|4|8|16}, or float{2|4|8|16} as the type for the arguments unless otherwise stated.
The suffix used in gentypen or the function name (i.e. vloadn, vstoren, etc.) represents the number of elements in the built-in vector type (n = 2, 4, 8, or 16).
The image read and write functions are extended with cl_khr_fp16 to include appropriate versions of functions that take half4 as arguments and return values.
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