image-access-pixel image-access x y => color-rep
(setf image-access-pixel) color-rep image-access x y => color-rep
The function image-access-pixel returns the pixel value at position x , y in the Image Access object image-access .
The pixel value color-rep is a color representation like that returned by convert-color. If needed, color-rep can be converted to an RGB value using unconvert-color.
The function
(setf image-access-pixel)
sets the value of the pixel at position
x
,
y
in the Image Access object
image-access
.
image-access must be an Image Access object returned by make-image-access.
image-access-transfer-to-image
image-access-transfer-from-image
free-image-access
make-image-access