gnu: Add blurhash.

* gnu/packages/image.scm (blurhash): New variable.

Signed-off-by: Ludovic Courtès <ludo@gnu.org>

gnu/packages/image.scm

@@ -29,6 +29,7 @@
 ;;; Copyright © 2020 Zhu Zihao <all_but_last@163.com>
 ;;; Copyright © 2020, 2021 Vinicius Monego <monego@posteo.net>
 ;;; Copyright © 2021 Sharlatan Hellseher <sharlatanus@gmail.com>
+;;; Copyright © 2021 Nicolò Balzarotti <nicolo@nixo.xyz>
 ;;;
 ;;; This file is part of GNU Guix.
 ;;;
@@ -60,6 +61,7 @@
   #:use-module (gnu packages fontutils)
   #:use-module (gnu packages freedesktop)
   #:use-module (gnu packages gettext)
+  #:use-module (gnu packages gcc)
   #:use-module (gnu packages ghostscript)
   #:use-module (gnu packages gimp)
   #:use-module (gnu packages gl)
@@ -2040,6 +2042,30 @@ SNG is implemented by a compiler/decompiler called sng that
 losslessly translates between SNG and PNG.")
     (license license:zlib)))
 
+(define-public blurhash
+  (package
+    (name "blurhash")
+    (version "0.0.1")
+    (source
+     (origin
+       (method git-fetch)
+       (uri (git-reference
+             (url "https://github.com/Nheko-Reborn/blurhash")
+             (commit (string-append "v" version))))
+       (file-name (git-file-name name version))
+       (sha256
+        (base32 "0jy2iigarskwfhskyladbb6l92x1fb3i3vz4bvcks0za4w5hfxk5"))))
+    (build-system meson-build-system)
+    (native-inputs
+     `(("cmake" ,cmake)
+       ("doctest" ,doctest)
+       ("gcc" ,gcc-8)))
+    (home-page "https://github.com/Nheko-Reborn/blurhash")
+    (synopsis "C++ blurhash encoder/decoder")
+    (description "Simple encoder and decoder for blurhashes.  Contains a
+command line program as well as a shared library.")
+    (license license:boost1.0)))
+
 (define-public lodepng
   ;; There are no tags in the repository, so we take the version as defined in
   ;; lodepng.cpp.