[openimageio] Add opencolorio as feature (#8210)

ports/openimageio/CONTROL

@@ -1,5 +1,5 @@
 Source: openimageio
-Version: 2019-08-08-2
+Version: 2019-08-08-3
 Homepage: https://github.com/OpenImageIO/oiio
 Description: A library for reading and writing images, and a bunch of related classes, utilities, and application
 Build-Depends: libjpeg-turbo, tiff, libpng, openexr, boost-thread, boost-smart-ptr, boost-foreach, boost-regex, boost-type-traits, boost-static-assert, boost-unordered, boost-config, boost-algorithm, boost-filesystem, boost-system, boost-thread, boost-asio, boost-random, robin-map, boost-stacktrace
@@ -7,3 +7,7 @@ Build-Depends: libjpeg-turbo, tiff, libpng, openexr, boost-thread, boost-smart-p
 Feature: libraw
 Build-Depends: libraw
 Description: Enable RAW image files support
+
+Feature: opencolorio
+Build-Depends: opencolorio
+Description: Enable opencolorio support for openimageio

ports/openimageio/portfile.cmake

@@ -24,16 +24,15 @@ else()
     set(LINKSTATIC OFF)
 endif()
 
-# Features
-set(USE_LIBRAW OFF)
-if("libraw" IN_LIST FEATURES)
-    set(USE_LIBRAW ON)
-endif()
+vcpkg_check_features(OUT_FEATURE_OPTIONS FEATURE_OPTIONS
+    libraw USE_LIBRAW
+    opencolorio USE_OCIO 
+)
 
 vcpkg_configure_cmake(
     SOURCE_PATH ${SOURCE_PATH}
     PREFER_NINJA
-    OPTIONS
+    OPTIONS ${FEATURE_OPTIONS}
         -DOIIO_BUILD_TOOLS=OFF
         -DOIIO_BUILD_TESTS=OFF
         -DHIDE_SYMBOLS=ON
@@ -42,9 +41,7 @@ vcpkg_configure_cmake(
         -DUSE_FIELD3D=OFF
         -DUSE_FREETYPE=OFF
         -DUSE_GIF=OFF
-        -DUSE_LIBRAW=${USE_LIBRAW}
         -DUSE_NUKE=OFF
-        -DUSE_OCIO=OFF
         -DUSE_OPENCV=OFF
         -DUSE_OPENJPEG=OFF
         -DUSE_OPENSSL=OFF