Function

Summary

Copies pixel values from an Image Access object into a vector.

Package

graphics-ports

Signature

image-access-pixels-to-bgra image-access vector

Arguments

image-access

An Image Access object.

vector

A vector.

Description

The function image-access-pixels-to-bgra copies all the pixels in the Image Access object image-access into the vector vector as a sequence of integer values in the range 0-255 for the blue, green, red and alpha components of each pixel. This function is optimized for the case where vector has element type (unsigned-byte 8) .

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 .

Note: image-access-pixels-from-bgra must be called before this function (similarly to image-access-pixel).

image-access must be an Image Access object returned by make-image-access.

Example

See the file
examples/capi/graphics/image-access-bgra.lisp .

See also

image-access-pixel
image-access-pixels-from-bgra