0024001: Stereographic rendering support

[occt.git] / src / OpenGl / OpenGl_Element.hxx

diff --git a/src/OpenGl/OpenGl_Element.hxx b/src/OpenGl/OpenGl_Element.hxx
index ba81189..2490656 100644 (file)
--- a/src/OpenGl/OpenGl_Element.hxx
+++ b/src/OpenGl/OpenGl_Element.hxx
@@ -1,34 +1,31 @@
 // Created on: 2011-08-05
 // Created by: Sergey ZERCHANINOV
-// Copyright (c) 2011-2012 OPEN CASCADE SAS
+// Copyright (c) 2011-2014 OPEN CASCADE SAS
 //
-// The content of this file is subject to the Open CASCADE Technology Public
-// License Version 6.5 (the "License"). You may not use the content of this file
-// except in compliance with the License. Please obtain a copy of the License
-// at http://www.opencascade.org and read it completely before using this file.
+// This file is part of Open CASCADE Technology software library.
 //
-// The Initial Developer of the Original Code is Open CASCADE S.A.S., having its
-// main offices at: 1, place des Freres Montgolfier, 78280 Guyancourt, France.
+// This library is free software; you can redistribute it and / or modify it
+// under the terms of the GNU Lesser General Public version 2.1 as published
+// by the Free Software Foundation, with special exception defined in the file
+// OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
+// distribution for complete text of the license and disclaimer of any warranty.
 //
-// The Original Code and all software distributed under the License is
-// distributed on an "AS IS" basis, without warranty of any kind, and the
-// Initial Developer hereby disclaims all such warranties, including without
-// limitation, any warranties of merchantability, fitness for a particular
-// purpose or non-infringement. Please see the License for the specific terms
-// and conditions governing the rights and limitations under the License.
-
+// Alternatively, this file may be used under the terms of Open CASCADE
+// commercial license or contractual agreement.
 
 #ifndef OpenGl_Element_Header
 #define OpenGl_Element_Header
 
 #include <Handle_OpenGl_Context.hxx>
 #include <Handle_OpenGl_Workspace.hxx>
+#include <OpenGl_RenderFilter.hxx>
 
+//! Base interface for drawable elements.
 class OpenGl_Element
 {
 public:
 
-  OpenGl_Element() {}
+  Standard_EXPORT OpenGl_Element();
 
   virtual void Render (const Handle(OpenGl_Workspace)& theWorkspace) const = 0;
 
@@ -50,9 +47,33 @@ public:
     theElement = NULL;
   }
 
+public:
+
+  //! Render element if it passes the filtering procedure. This method should
+  //! be used for elements which can be used in scope of rendering algorithms.
+  //! E.g. elements of groups during recursive rendering.
+  //! If render filter is null, pure rendering is performed.
+  //! @param theWorkspace [in] the rendering workspace.
+  //! @param theFilter [in] the rendering filter to check whether the element
+  //! should be rendered or not.
+  //! @return True if element passes the filering check and is rendered.
+  inline Standard_Boolean
+    RenderFiltered (const Handle(OpenGl_Workspace)& theWorkspace,
+                    const Handle(OpenGl_RenderFilter)& theFilter) const
+  {
+    if (!theFilter.IsNull() && !theFilter->CanRender (this))
+    {
+      return Standard_False;
+    }
+
+    Render (theWorkspace);
+
+    return Standard_True;
+  }
+
 protected:
 
-  virtual ~OpenGl_Element() {}
+  Standard_EXPORT virtual ~OpenGl_Element();
 
 public:
 
@@ -60,4 +81,4 @@ public:
 
 };
 
-#endif //OpenGl_Element_Header
+#endif // OpenGl_Element_Header