点阵完成，加入opencv

3rdpart/OpenCV/include/opencv2/gapi/gtransform.hpp

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+// This file is part of OpenCV project.
+// It is subject to the license terms in the LICENSE file found in the top-level directory
+// of this distribution and at http://opencv.org/license.html.
+//
+// Copyright (C) 2019 Intel Corporation
+
+#ifndef OPENCV_GAPI_GTRANSFORM_HPP
+#define OPENCV_GAPI_GTRANSFORM_HPP
+
+#include <functional>
+#include <type_traits>
+#include <utility>
+
+#include <opencv2/gapi/gcommon.hpp>
+#include <opencv2/gapi/util/util.hpp>
+#include <opencv2/gapi/garg.hpp>
+#include <opencv2/gapi/gtype_traits.hpp>
+#include <opencv2/gapi/util/compiler_hints.hpp>
+#include <opencv2/gapi/gcomputation.hpp>
+
+namespace cv
+{
+
+struct GAPI_EXPORTS GTransform
+{
+    // FIXME: consider another simplified
+    // class instead of GComputation
+    using F = std::function<GComputation()>;
+
+    std::string description;
+    F pattern;
+    F substitute;
+
+    GTransform(const std::string& d, const F &p, const F &s) : description(d), pattern(p), substitute(s) {}
+};
+
+namespace detail
+{
+
+template <typename, typename, typename>
+struct TransHelper;
+
+template <typename K, typename... Ins, typename Out>
+struct TransHelper<K, std::tuple<Ins...>, Out>
+{
+    template <typename Callable, int... IIs, int... OIs>
+    static GComputation invoke(Callable f, Seq<IIs...>, Seq<OIs...>)
+    {
+        const std::tuple<Ins...> ins;
+        const auto r = tuple_wrap_helper<Out>::get(f(std::get<IIs>(ins)...));
+        return GComputation(cv::GIn(std::get<IIs>(ins)...),
+                            cv::GOut(std::get<OIs>(r)...));
+    }
+
+    static GComputation get_pattern()
+    {
+        return invoke(K::pattern, typename MkSeq<sizeof...(Ins)>::type(),
+                      typename MkSeq<std::tuple_size<typename tuple_wrap_helper<Out>::type>::value>::type());
+    }
+    static GComputation get_substitute()
+    {
+        return invoke(K::substitute, typename MkSeq<sizeof...(Ins)>::type(),
+                      typename MkSeq<std::tuple_size<typename tuple_wrap_helper<Out>::type>::value>::type());
+    }
+};
+} // namespace detail
+
+template <typename, typename>
+class GTransformImpl;
+
+template <typename K, typename R, typename... Args>
+class GTransformImpl<K, std::function<R(Args...)>> : public cv::detail::TransHelper<K, std::tuple<Args...>, R>,
+                                                     public cv::detail::TransformTag
+{
+public:
+    // FIXME: currently there is no check that transformations' signatures are unique
+    // and won't be any intersection in graph compilation stage
+    using API = K;
+
+    static GTransform transformation()
+    {
+        return GTransform(K::descr(), &K::get_pattern, &K::get_substitute);
+    }
+};
+} // namespace cv
+
+#define G_DESCR_HELPER_CLASS(Class) Class##DescrHelper
+
+#define G_DESCR_HELPER_BODY(Class, Descr)                       \
+    namespace detail                                            \
+    {                                                           \
+    struct G_DESCR_HELPER_CLASS(Class)                          \
+    {                                                           \
+        static constexpr const char *descr() { return Descr; }  \
+    };                                                          \
+    }
+
+#define GAPI_TRANSFORM(Class, API, Descr)                                     \
+    G_DESCR_HELPER_BODY(Class, Descr)                                         \
+    struct Class final : public cv::GTransformImpl<Class, std::function API>, \
+                         public detail::G_DESCR_HELPER_CLASS(Class)
+
+#endif // OPENCV_GAPI_GTRANSFORM_HPP