Copies a vector of pixel values into an Image Access object.
graphics-ports
image-access-pixels-from-bgra image-access vector
image-access⇩ |
An Image Access object. |
vector⇩ |
A vector. |
The function image-access-pixels-from-bgra
copies all the pixels to the Image Access object image-access from the vector vector. vector should contain a sequence of integer values in the range 0-255 for blue, green, red and alpha of each pixel. This function is optimized for the case where vector has element type (unsigned-byte 8)
. If the image has alpha, the values in vector are premultiplied.
An error is signalled if vector is not of the correct length for the Image Access object, that is (* 4 width height)
where width and height represent the size of image-access.
image-access must be an Image Access object returned by make-image-access.
(setf
image-access-pixel)
).
(example-edit-file "capi/graphics/image-access-bgra")
color-from-premultiplied
image-access-pixel
image-access-pixels-to-bgra
CAPI User Guide and Reference Manual (Unix version) - 01 Dec 2021 19:33:02