gnu: Add stiff.

* gnu/packages/image-processing.scm (stiff): New variable.

Co-authored-by: Sharlatan Hellseher <sharlatanus@gmail.com>
Signed-off-by: Leo Famulari <leo@famulari.name>

gnu/packages/image-processing.scm

@@ -12,6 +12,7 @@
 ;;; Copyright © 2020 Vinicius Monego <monego@posteo.net>
 ;;; Copyright © 2020 Pierre Neidhardt <mail@ambrevar.xyz>
 ;;; Copyright © 2020 Brendan Tildesley <mail@brendan.scot>
+;;; Copyright © 2021 Oleh Malyi <astroclubzp@gmail.com>
 ;;;
 ;;; This file is part of GNU Guix.
 ;;;
@@ -1064,3 +1065,27 @@ (define-public scantailor-advanced
 Scan Tailer Advanced is a fork of Scan Tailer that merges Scan Tailor Featured
 and Scan Tailor Enhanced versions as well as including many more bug fixes.")
       (license license:gpl3+))))
+
+(define-public stiff
+  (package
+    (name "stiff")
+    (version "2.4.0")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (string-append "https://www.astromatic.net/download/stiff/stiff-"
+                           version ".tar.gz"))
+       (sha256
+        (base32 "14m92dskzw7bwsr64ha4p0mj3ndv13gwcbfic3qxrs3zq5353s7l"))))
+    (build-system gnu-build-system)
+    (inputs
+     `(("libtiff" ,libtiff)
+       ("zlib" ,zlib)
+       ("libjpeg-turbo" ,libjpeg-turbo)))
+    (home-page "https://www.astromatic.net/software/stiff")
+    (synopsis "Convert scientific FITS images to TIFF format")
+    (description
+     "STIFF is a program that converts scientific @acronym{FITS, Flexible Image
+Transport System} images to the more popular TIFF format for illustration
+purposes.")
+    (license license:gpl3+)))