Adding libpng-APNG (libpng with a patch for animated png support)

svn path=/nixpkgs/trunk/; revision=24167

pkgs/development/libraries/libpng/libpng-apng.nix

@@ -0,0 +1,32 @@
+{ stdenv, fetchurl, zlib }:
+
+assert zlib != null;
+
+stdenv.mkDerivation rec {
+  version = "1.4.4";
+  name = "libpng-${version}";
+  
+  patch_src = fetchurl {
+    url = "mirror://sourceforge/project/libpng-apng/libpng-master/${version}/libpng-${version}-apng.patch.gz";
+    sha256 = "d729a2feacfd80547e06c30343d598302f4417cf2e6f649e4ee617690987bd24";
+  };
+
+  src = fetchurl {
+    url = "mirror://sourceforge/libpng/${name}.tar.gz";
+    sha256 = "d07616ba1e9c161017384feb3b576d70c160b970abfd9549ad39a622284b574a";
+  };
+
+  preConfigure = ''
+    gunzip < ${patch_src} | patch -Np1
+  '';
+  
+  propagatedBuildInputs = [ zlib ];
+
+  passthru = { inherit zlib; };
+  
+  meta = {
+    description = "The official reference implementation for the PNG file format";
+    homepage = http://www.libpng.org/pub/png/libpng.html;
+    license = "free-non-copyleft"; # http://www.libpng.org/pub/png/src/libpng-LICENSE.txt
+  };
+}