BUG:IsDirect was not implemented in vtkCarbonRenderWindow.

Author: fbertelatkitware

Rendering/vtkCarbonRenderWindow.cxx

@@ -429,6 +429,12 @@ void vtkCarbonRenderWindow::SetForceMakeCurrent()
   this->ForceMakeCurrent = 1;
 }
 
+// --------------------------------------------------------------------------
+int vtkCarbonRenderWindow::IsDirect()
+{
+  return 1;
+}
+
 // --------------------------------------------------------------------------
 void vtkCarbonRenderWindow::SetSize(int a[2])
 {

Rendering/vtkCarbonRenderWindow.h

@@ -210,6 +210,11 @@ class VTK_RENDERING_EXPORT vtkCarbonRenderWindow : public vtkOpenGLRenderWindow
   // on the next render.
   void SetForceMakeCurrent();
 
+  // Description:
+  // Is this render window using hardware acceleration? 0-false, 1-true.
+  // Always true for Carbon.
+  virtual int IsDirect();
+  
   // Description:
   // Check to see if an event is pending for this window.
   // This is a useful check to abort a long render.