0024637: Visualization - clean up implementation of rendering in immediate mode

Remove unused flag "DoubleBuf".
Remove Visual3d_TransientManager "class" (functionality moved to PrsMgr_PresentationManager).
Remove unused "Add" immediate mode.

V3d_View class - remove methods ::TransientManagerBeginDraw(), ::TransientManagerClearDraw(), ::TransientManagerBeginAddDraw().
Add method ::RedrawImmediate() to redraw only immediate presentations.

OpenGl_GraphicDriver - add methods ::DisplayImmediateStructure(), ::EraseImmediateStructure(), ::RedrawImmediate().
OpenGl_View - manage list of immediate structures.
OpenGl_Workspace - automate rendering workflow of immediate + persistent layers.

Merge PrsMgr_PresentationManager3d class into PrsMgr_PresentationManager.
Mark PrsMgr_PresentationManager3d as alias to PrsMgr_PresentationManager to simplify porting.

Prs3d_Presentation - remove unused field myStruct.
Prs3d_PresentationShadow - shadow link to existing presentation with custom attributes.
Graphic3d_Structure::Highlight() - do not register undisplayed structure in structure manager.

AIS_InteractiveContext, AIS_LocalContext add flag to prevent view update into methods
::MoveTo(), ::HilightNextDetected(), ::HilightPreviousDetected()
to allow update of customized immediate structures before redraw but after ::MoveTo().

Remove unused method AIS_InteractiveContext::Drag().

StdSelect_ViewerSelector3d do not user immediate mode in methods
::DisplayAreas(), ::ClearAreas(), ::ClearSensitive(), ::DisplaySensitive(),

GridEcho - update value in StdSelect_ViewerSelector3d::Pick() instead of V3d_View::Compute().
Do not use global variable for GridEcho vertex.
Redraw immediate mode not within GridEcho but at AIS_InteractiveContext, AIS_LocalContext layer.

V3d_View::ToPixMap() - disable autoupdate during FitAll.
Avoid Redraw() into FBO without ImmediateModeDrawToFront flag.

PrsMgr_PresentationManager stores list of temporary immediate presentations,
automatically cleared within BeginImmediateMode() call.
Methods with ambiguous names have been renamed
(new names now consistent with pre-existed method names in AIS_LocalContext class):
- BeginDraw -> BeginImmediateDraw
- EndDraw -> EndImmediateDraw
Remove now useless Remove() method (and ImmediateRemove() in AIS).

Visual3d_View now stores map of displayed immediate presentations.

ViewerTest_EventManager - eliminate double redraw in selection methods.

Fix warning

src/StdSelect/StdSelect_ViewerSelector3d.cxx

@@ -31,7 +31,6 @@
 #include <SelectMgr_SelectableObject.hxx>
 #include <SelectMgr_DataMapIteratorOfDataMapOfIntegerSensitive.hxx>
 #include <SelectBasics_ListOfBox2d.hxx>
-#include <Visual3d_TransientManager.hxx>
 #include <TColgp_HArray1OfPnt.hxx>
 #include <TColgp_Array1OfPnt.hxx>
 #include <TColgp_HArray1OfPnt2d.hxx>
@@ -49,6 +48,7 @@
 #include <Select3D_ListIteratorOfListOfSensitiveTriangle.hxx>
 
 #include <SelectMgr_DataMapIteratorOfDataMapOfSelectionActivation.hxx>
+#include <Aspect_Grid.hxx>
 #include <Aspect_TypeOfMarker.hxx>
 #include <Graphic3d_AspectMarker3d.hxx>
 #include <Graphic3d_ArrayOfPoints.hxx>
@@ -61,9 +61,9 @@
 #include <OSD_Environment.hxx>
 #include <V3d.hxx>
 #include <V3d_View.hxx>
+#include <V3d_Viewer.hxx>
 #include <TColgp_SequenceOfPnt.hxx>
 
-
 static Standard_Integer StdSel_NumberOfFreeEdges (const Handle(Poly_Triangulation)& Trg)
 {
   Standard_Integer nFree = 0;
@@ -196,15 +196,14 @@ void StdSelect_ViewerSelector3d::Pick (const Standard_Integer theXPix,
 {
   SetClipping (theView->GetClipPlanes());
   UpdateProj (theView);
+  Standard_Real aPnt3d[3];
+  theView->Convert (theXPix, theYPix,
+                    aPnt3d[0], aPnt3d[1], aPnt3d[2]);
 
-  Standard_Real aXr3d = 0.0;
-  Standard_Real aYr3d = 0.0;
-  Standard_Real aZr3d = 0.0;
-  gp_Pnt2d aP2d;
-  theView->Convert (theXPix, theYPix, aXr3d, aYr3d, aZr3d);
-  myProjector->Project (gp_Pnt (aXr3d, aYr3d, aZr3d), aP2d);
+  gp_Pnt2d aPnt2d;
+  myProjector->Project (gp_Pnt (aPnt3d[0], aPnt3d[1], aPnt3d[2]), aPnt2d);
 
-  InitSelect (aP2d.X(), aP2d.Y());
+  InitSelect (aPnt2d.X(), aPnt2d.Y());
 }
 
 //=======================================================================
@@ -373,15 +372,7 @@ void StdSelect_ViewerSelector3d::DisplayAreas (const Handle(V3d_View)& theView)
   myareagroup->Structure()->SetDisplayPriority (10);
   myareagroup->Structure()->Display();
 
-  if (theView->TransientManagerBeginDraw())
-  {
-    Visual3d_TransientManager::DrawStructure (mystruct);
-    Visual3d_TransientManager::EndDraw();
-  }
-  else
-  {
-    theView->Update();
-  }
+  theView->Update();
 }
 
 //=======================================================================
@@ -397,16 +388,7 @@ void StdSelect_ViewerSelector3d::ClearAreas (const Handle(V3d_View)& theView)
 
   myareagroup->Clear();
 
-  if (theView.IsNull())
-  {
-    return;
-  }
-
-  if (theView->TransientManagerBeginDraw())
-  {
-    Visual3d_TransientManager::EndDraw();
-  }
-  else
+  if (!theView.IsNull())
   {
     theView->Update();
   }
@@ -588,15 +570,7 @@ void StdSelect_ViewerSelector3d::DisplaySensitive (const Handle(V3d_View)& theVi
   mysensgroup->Structure()->SetDisplayPriority (10);
   mystruct->Display();
 
-  if (theView->TransientManagerBeginDraw())
-  {
-    Visual3d_TransientManager::DrawStructure (mystruct);
-    Visual3d_TransientManager::EndDraw();
-  }
-  else if (!theView.IsNull())
-  {
-    theView->Update();
-  }
+  theView->Update();
 }
 
 //=======================================================================
@@ -617,14 +591,7 @@ void StdSelect_ViewerSelector3d::ClearSensitive (const Handle(V3d_View)& theView
     return;
   }
 
-  if (theView->TransientManagerBeginDraw())
-  {
-    Visual3d_TransientManager::EndDraw();
-  }
-  else
-  {
-    theView->Update();
-  }
+  theView->Update();
 }
 
 //=======================================================================
@@ -661,15 +628,8 @@ void StdSelect_ViewerSelector3d::DisplaySensitive (const Handle(SelectMgr_Select
 
   mystruct->SetDisplayPriority (10);
   mystruct->Display();
-  if (theView->TransientManagerBeginDraw())
-  {
-    Visual3d_TransientManager::DrawStructure (mystruct);
-    Visual3d_TransientManager::EndDraw();
-  }
-  else if(!theView.IsNull())
-  {
-    theView->Update();
-  }
+
+  theView->Update();
 }
 
 //=======================================================================
@@ -702,15 +662,7 @@ void StdSelect_ViewerSelector3d::DisplayAreas (const Handle(SelectMgr_Selection)
   mystruct->SetDisplayPriority (10);
   mystruct->Display();
 
-  if(theView->TransientManagerBeginDraw())
-  {
-    Visual3d_TransientManager::DrawStructure (mystruct);
-    Visual3d_TransientManager::EndDraw();
-  }
-  else
-  {
-    theView->Update();
-  }
+  theView->Update();
 }
 
 //=======================================================================