Welcome to the CHICKEN Scheme pasting service

(define stbi-load
  (foreign-lambda* c-pointer ((c-string filename)
                              ((c-pointer integer) width)
                              ((c-pointer integer) height))
    "int components;
  return stbi_load(filename, width, height, &components, 4);"))

(define (stbi-load filename)
  (let-location ((width int)
                 (height int))
    (let* ((ptr ((foreign-lambda (c-pointer unsigned-char) stbi_load c-string (c-pointer int) (c-pointer int))
                filename
                (location width)
                (location height)))
           (size (* width height 4))
           (result (make-u8vector size)))
      (move-memory! ptr result size)
      (free ptr)
      result)))