opencv: add version 3.0

Adding as a separate expression, as it is not api compatible with 2.x.

pkgs/development/libraries/opencv/3.x.nix

@@ -0,0 +1,30 @@
+{ lib, stdenv, fetchurl, cmake, gtk, libjpeg, libpng, libtiff, jasper, ffmpeg
+, fetchpatch, pkgconfig, gstreamer, xineLib, glib, python27, python27Packages, unzip
+, enableBloat ? false }:
+
+let v = "3.0.0"; in
+
+stdenv.mkDerivation rec {
+  name = "opencv-${v}";
+
+  src = fetchurl {
+    url = "https://github.com/Itseez/opencv/archive/${v}.zip";
+    sha256 = "00dh7wvgkflz22liqd10fma8m3395lb3l3rgawnn5wlnz6i4w287";
+  };
+
+  buildInputs =
+    [ unzip libjpeg libpng libtiff ]
+    ++ lib.optionals enableBloat [ gtk glib jasper ffmpeg xineLib gstreamer python27 python27Packages.numpy ];
+
+  nativeBuildInputs = [ cmake pkgconfig ];
+
+  enableParallelBuilding = true;
+
+  meta = {
+    description = "Open Computer Vision Library with more than 500 algorithms";
+    homepage = http://opencv.org/;
+    license = stdenv.lib.licenses.bsd3;
+    maintainers = with stdenv.lib.maintainers; [viric flosse];
+    platforms = with stdenv.lib.platforms; linux;
+  };
+}

pkgs/top-level/all-packages.nix

@@ -7790,6 +7790,8 @@ let
     libpng = libpng12;
   };
 
+  opencv3 = callPackage ../development/libraries/opencv/3.x.nix { };
+
   # this ctl version is needed by openexr_viewers
   openexr_ctl = ctl;