0032073: Visualization - implement interface to change myToFlipOutput of OpenGl_View

src/Graphic3d/Graphic3d_CView.hxx

@@ -96,6 +96,12 @@ public:
   //! Sets camera used by the view.
   virtual void SetCamera (const Handle(Graphic3d_Camera)& theCamera) { myCamera = theCamera; }
 
+  //! Returns necessity to flip OY in projection matrix
+  virtual Standard_Boolean IsToFlipOutput() const { return Standard_False; }
+
+  //! Sets state of flip OY necessity in projection matrix
+  virtual void SetToFlipOutput (const Standard_Boolean) {}
+
 public:
 
   //! Returns default Shading Model of the view; Graphic3d_TOSM_FRAGMENT by default.

src/OpenGl/OpenGl_View.hxx

@@ -348,6 +348,12 @@ public: //! @name obsolete Graduated Trihedron functionality
   //! @param theMax [in] the maximum point of scene.
   Standard_EXPORT virtual void GraduatedTrihedronMinMaxValues (const Graphic3d_Vec3 theMin, const Graphic3d_Vec3 theMax) Standard_OVERRIDE;
 
+  //! Returns necessity to flip OY in projection matrix
+  virtual Standard_Boolean IsToFlipOutput() const Standard_OVERRIDE { return myToFlipOutput; }
+
+  //! Sets state of flip OY necessity in projection matrix
+  virtual void SetToFlipOutput (const Standard_Boolean theFlip) Standard_OVERRIDE { myToFlipOutput = theFlip; }
+
 protected: //! @name Internal methods for managing GL resources
 
   //! Initializes OpenGl resource for environment texture.