From 24f0eccaa8848c4bbd3db3be6d8af0f3669f46f7 Mon Sep 17 00:00:00 2001
From: Jaka Hudoklin <jakahudoklin@gmail.com>
Date: Mon, 28 Oct 2013 18:32:23 +0100
Subject: [PATCH] Add pngquant, it converts 24/32-bit RGBA PNGs to 8-bit
 palette with alpha channel preserved.

---
 pkgs/tools/graphics/pngquant/default.nix | 26 ++++++++++++++++++++++++
 pkgs/top-level/all-packages.nix          |  2 ++
 2 files changed, 28 insertions(+)
 create mode 100644 pkgs/tools/graphics/pngquant/default.nix

diff --git a/pkgs/tools/graphics/pngquant/default.nix b/pkgs/tools/graphics/pngquant/default.nix
new file mode 100644
index 00000000000..560352c481e
--- /dev/null
+++ b/pkgs/tools/graphics/pngquant/default.nix
@@ -0,0 +1,26 @@
+{ stdenv, fetchgit, libpng }:
+
+stdenv.mkDerivation rec {
+  name = "pngquant-${version}";
+  version = "2.0.1";
+
+  src = fetchgit {
+    url = https://github.com/pornel/pngquant.git;
+    rev = "refs/tags/${version}";
+    sha256 = "00mrv9wgxbwy517l8i4n7n3jpzirjdgi0zass3wj29i7xyipwlhf";
+  };
+
+  buildInputs = [ libpng ];
+
+  preInstall = ''
+    mkdir -p $out/bin
+    export PREFIX=$out
+  '';
+
+  meta = with stdenv.lib; {
+    homepage = https://github.com/pornel/pngquant;
+    description = "pngquant converts 24/32-bit RGBA PNGs to 8-bit palette with alpha channel preserved";
+    platforms = platforms.all;
+    license = licenses.bsd2; # Not exactly bsd2, but alike
+  };
+}
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 7b274c4043b..5f8616096df 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -1596,6 +1596,8 @@ let
     libpng = libpng12;
   };
 
+  pngquant = callPackage ../tools/graphics/pngquant { };
+
   podiff = callPackage ../tools/text/podiff { };
 
   poedit = callPackage ../tools/text/poedit { };