gnu: Add rust-png-0.15.

* gnu/packages/crates-io.scm (rust-png-0.15): New variable.

Signed-off-by: Efraim Flashner <efraim@flashner.co.il>

gnu/packages/crates-io.scm

@@ -10811,6 +10811,40 @@ (define-public rust-plugin-0.2
      "Lazily evaluated, order-independent plugins for extensible types.")
     (license license:expat)))
 
+(define-public rust-png-0.15
+  (package
+    (name "rust-png")
+    (version "0.15.3")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (crate-uri "png" version))
+       (file-name
+        (string-append name "-" version ".tar.gz"))
+       (sha256
+        (base32
+         "10x2qkhyfnm3si5vgx77r2ik811gaap7ahi825wfxgsb0lirm1gg"))))
+    (build-system cargo-build-system)
+    (arguments
+     `(#:skip-build? #t
+       #:cargo-inputs
+       (("rust-bitflags" ,rust-bitflags-1)
+        ("rust-crc32fast" ,rust-crc32fast-1.2)
+        ("rust-deflate" ,rust-deflate-0.7)
+        ("rust-inflate" ,rust-inflate-0.4))
+       #:cargo-development-inputs
+       (("rust-getopts" ,rust-getopts-0.2)
+        ;; TODO: glium has many cyclic dependencies with other packages
+        ;;("rust-glium" ,rust-glium-0.24)
+        ("rust-glob" ,rust-glob-0.3)
+        ("rust-rand" ,rust-rand-0.7)
+        ("rust-term" ,rust-term-0.6))))
+    (home-page "https://github.com/image-rs/image-png.git")
+    (synopsis "PNG decoding and encoding library in pure Rust")
+    (description
+     "PNG decoding and encoding library in pure Rust.")
+    (license (list license:expat license:asl2.0))))
+
 (define-public rust-pocket-resources-0.3
   (package
     (name "rust-pocket-resources")