8.1.3 Z-Format Images

The image-z subtype represents an image as a two-dimensional array of pixels, in scanline order. The following paragraphs describe the additional CLX functions that can be used to access image-z objects.

Function: image-z-bits-per-pixel image

image

An image-z object.

Returns and (with setf) changes the number of bits per data unit used to contain a pixel value for the image. Depending on the storage format for image data, this value can be larger than the actual image depth.

pixel-data-size

One of 1, 4, 8, 16, 24, or 32.

Function: image-z-pixarray image

image

An image-z object.

Returns and (with setf) changes the two-dimensional array of pixel data for the image.

pixarray

Type pixarray.