Add pngquant, it converts 24/32-bit RGBA PNGs to 8-bit palette with alpha channel preserved.

1 files changed, 26 insertions, 0 deletions

diff --git a/pkgs/tools/graphics/pngquant/default.nix b/pkgs/tools/graphics/pngquant/default.nix
new file mode 100644
index 000000000000..560352c481ea
--- /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
+  };
+}