specials.lisp

   1 ;;;
   2 ;;; Copyright (c) 2007 Zachary Beane, All Rights Reserved
   3 ;;;
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   5 ;;; modification, are permitted provided that the following conditions
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   9 ;;;     notice, this list of conditions and the following disclaimer.
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  11 ;;;   * Redistributions in binary form must reproduce the above
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  13 ;;;     disclaimer in the documentation and/or other materials
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  28
  29 (in-package #:zpng)
  30
  31 (defvar *color-types*
  32   '((:grayscale . 0)
  33     (:truecolor . 2)
  34     (:indexed-color . 3)
  35     (:grayscale-alpha . 4)
  36     (:truecolor-alpha . 6)))
  37
  38 (defvar *png-signature*
  39   (make-array 8
  40               :element-type '(unsigned-byte 8)
  41               :initial-contents '(137 80 78 71 13 10 26 10)))
  42
  43 (defconstant +png-compression-method+ 0)
  44 (defconstant +png-filtering+ 0)
  45 (defconstant +png-interlace+ 0)