Merge pull request #18196 from mpashchenkov:mp/garray-initialization

[G-API]: Add GArray initialization support

* Added GArray initialization (CONST_VALUE, GScalar analog) and test for this

* Whitespaces

* And one more space

* Trailing whitespace

* Test name changed. Build with magic commands.

* GArray works with rvalue initialization

* Code cleanup

* Ternary operator in the initialization list.

modules/gapi/src/api/garray.cpp

@@ -20,6 +20,11 @@ cv::detail::GArrayU::GArrayU(const GNode &n, std::size_t out)
 {
 }
 
+cv::detail::GArrayU::GArrayU(const detail::VectorRef& vref)
+    : m_priv(new GOrigin(GShape::GARRAY, cv::gimpl::ConstVal(vref)))
+{
+}
+
 cv::GOrigin& cv::detail::GArrayU::priv()
 {
     return *m_priv;

modules/gapi/src/api/gorigin.cpp

@@ -21,7 +21,10 @@ cv::GOrigin::GOrigin(GShape s,
 }
 
 cv::GOrigin::GOrigin(GShape s, cv::gimpl::ConstVal v)
-    : shape(s), node(cv::GNode::Const()), value(v), port(INVALID_PORT), kind(cv::detail::OpaqueKind::CV_UNKNOWN)
+    : shape(s), node(cv::GNode::Const()), value(v), port(INVALID_PORT),
+      kind(util::holds_alternative<detail::VectorRef>(v)
+               ? util::get<detail::VectorRef>(v).getKind()
+               : cv::detail::OpaqueKind::CV_UNKNOWN)
 {
 }
 

modules/gapi/src/api/gproto.cpp

@@ -79,6 +79,7 @@ cv::GRunArg cv::value_of(const cv::GOrigin &origin)
     switch (origin.shape)
     {
     case GShape::GSCALAR: return GRunArg(util::get<cv::Scalar>(origin.value));
+    case GShape::GARRAY:  return GRunArg(util::get<cv::detail::VectorRef>(origin.value));
     default: util::throw_error(std::logic_error("Unsupported shape for constant"));
     }
 }