anchor.diff:             :map-c-into
              :map-c
              :ptr-index
  -           :c-array-index))
  +           :c-array-index
  +           :copy-lisp-data-to-c-array
  +           :copy-c-array-to-new-lisp-data))
   
   (uiop:define-package :cepl.gpu-buffers
       (:use :cl :glsl-symbols :cffi :cepl-utils :varjo
  
positive.code:            :texture-mutable-p
             :buffer-texture
             :buffer-texture-p
  
             :make-texture-from-id
             :make-texture
  
negative.code:            :with-gpu-array-as-c-array
             :with-gpu-array-range-as-pointer
             :with-gpu-array-range-as-c-array
             :reallocate-gpu-array
             :copy-buffer-backed-gpu-array-to-new-c-array
             :copy-buffer-backed-gpu-array-to-new-lisp-data
             :copy-c-array-to-buffer-backed-gpu-array
             :copy-lisp-data-to-buffer-backed-gpu-array))
  
  (uiop:define-package :cepl.samplers
      (:use :cl :glsl-symbols :cffi :cepl-utils :varjo
  