The generic function
make-image-access
returns an Image Access object for the given image image.
image can be any image object returned by make-image-from-port. An image object returned by load-image is also suitable, but only if it is a Plain Image (see below).
image-access is used when reading and writing the pixel values of the image. For an overview of using Image Access objects, see the Graphics Ports chapter in the LispWorks CAPI User Guide .
Note: on some platforms (currently Windows) not every image object is a Plain Image. If needed, forcibly create a Plain Image suitable for passing to
make-image-access
as described in load-image.
Note: ensure that you eventually discard image-access , using free-image-access.
free-image-access
image-access-transfer-from-image
image-access-transfer-to-image
image-access-pixel
load-image
make-image