Fixed standalone build, added cv::gapi::proto::ptr test

modules/gapi/src/api/gproto.cpp

@@ -266,7 +266,6 @@ std::ostream& operator<<(std::ostream& os, const cv::GMetaArg &arg)
 }
 } // namespace cv
 
-// TODO: This function requires thorough testing
 const void* cv::gimpl::proto::ptr(const GRunArgP &arg)
 {
     switch (arg.index())

modules/gapi/src/api/gproto_priv.hpp

@@ -28,7 +28,8 @@ GAPI_EXPORTS const GOrigin& origin_of (const GArg      &arg);
 bool           is_dynamic(const GArg      &arg);
 GProtoArg      rewrap    (const GArg      &arg);
 
-const void*    ptr       (const GRunArgP  &arg);
+// FIXME:: GAPI_EXPORTS because of tests only!!
+GAPI_EXPORTS const void*    ptr       (const GRunArgP  &arg);
 
 } // proto
 } // gimpl

modules/gapi/src/compiler/gislandmodel.cpp

@@ -344,6 +344,7 @@ void GIslandExecutable::run(GIslandExecutable::IInput &in, GIslandExecutable::IO
         // This kludge should go as a result of de-ownification
         const cv::GRunArg& in_data_orig = std::get<1>(it);
         cv::GRunArg in_data;
+#if !defined(GAPI_STANDALONE)
         switch (in_data_orig.index())
         {
         case cv::GRunArg::index_of<cv::Mat>():
@@ -356,6 +357,9 @@ void GIslandExecutable::run(GIslandExecutable::IInput &in, GIslandExecutable::IO
             in_data = in_data_orig;
             break;
         }
+#else
+        in_data = in_data_orig;
+#endif // GAPI_STANDALONE
         in_objs.emplace_back(std::get<0>(it), std::move(in_data));
     }
     for (auto &&it: ade::util::indexed(ade::util::toRange(out_desc)))

modules/gapi/src/executor/gstreamingexecutor.cpp

@@ -420,8 +420,13 @@ class StreamingOutput final: public cv::gimpl::GIslandExecutable::IOutput
     // Prepare this object for posting
     virtual cv::GRunArgP get(int idx) override
     {
+#if !defined(GAPI_STANDALONE)
         using MatType = cv::Mat;
         using SclType = cv::Scalar;
+#else
+        using MatType = cv::gapi::own::Mat;
+        using SclType = cv::gapi::own::Scalar;
+#endif // GAPI_STANDALONE
 
         // Allocate a new posting first, then bind this GRunArgP to this item
         auto iter    = m_postings[idx].insert(m_postings[idx].end(), Posting{});