From: pkv <pkv@opencascade.com>
Date: Tue, 27 Sep 2005 14:31:46 +0000 (+0000)
Subject: Add functionality to display the rendering performance (FPS) of the vtk viewer
X-Git-Tag: BR-D5-38-2003_D2005-12-10~130
X-Git-Url: http://git.salome-platform.org/gitweb/?a=commitdiff_plain;h=944f3e80de46db0d75a63177fe3bb1b9203ae556;p=modules%2Fvisu.git

Add functionality to display the rendering performance (FPS) of the vtk viewer
---

diff --git a/src/VVTK/VVTK_Renderer.cxx b/src/VVTK/VVTK_Renderer.cxx
index 8060c0ec..625e2fbe 100644
--- a/src/VVTK/VVTK_Renderer.cxx
+++ b/src/VVTK/VVTK_Renderer.cxx
@@ -40,6 +40,17 @@
 #include <vtkCommand.h>
 #include <vtkPlane.h>
 
+#include <vtkPropCollection.h>
+#include <vtkProp.h>
+#include <vtkActor.h>
+#include <vtkMapper.h>
+#include <vtkPolyDataMapper.h>
+#include <vtkPolyData.h>
+#include <vtkTextMapper.h>
+#include <vtkTextActor.h> 
+#include <vtkTextProperty.h>
+#include <vtkRenderer.h>
+
 #include "utilities.h"
 
 #ifdef _DEBUG_
@@ -48,6 +59,70 @@ static int MYDEBUG = 0;
 static int MYDEBUG = 0;
 #endif
 
+#include <vtkPropCollection.h>
+#include <vtkProp.h>
+#include <vtkActor.h>
+#include <vtkMapper.h>
+#include <vtkPolyDataMapper.h>
+#include <vtkPolyData.h>
+#include <vtkTextMapper.h>
+#include <vtkTextActor.h> 
+#include <vtkTextProperty.h>
+#include <vtkRenderer.h>
+//
+class VISU_FPSTextActor : public vtkTextActor {
+public:
+  vtkTypeMacro( VISU_FPSTextActor, vtkTextActor);
+  static  VISU_FPSTextActor* New();
+  virtual int RenderOpaqueGeometry(vtkViewport *theViewport);
+};
+//
+vtkStandardNewMacro(VISU_FPSTextActor);
+//
+//======================================================================
+// function: RenderOpaqueGeometry
+// purpose :
+//======================================================================
+int VISU_FPSTextActor::RenderOpaqueGeometry(vtkViewport *theViewport) {
+
+  vtkRenderer *pRenderer= dynamic_cast <vtkRenderer*>(theViewport);
+  if (pRenderer){
+    float aTS, aTol=1.e-6;
+    char buf[128]={"Divide by zero"};
+    //
+    aTS =pRenderer->GetLastRenderTimeInSeconds ();
+    if (aTS>aTol) {
+      vtkProp *pProp;
+      int iCount=0;
+      //
+      vtkPropCollection *pProps=pRenderer->GetProps();
+      pProps->InitTraversal();
+      for (; 1; ) {
+	pProp=pProps->GetNextProp();
+	if(!pProp) {
+	  break;
+	}
+	vtkActor *pActor=dynamic_cast <vtkActor*>(pProp);
+	if (pActor){
+	  if (pProp->GetVisibility()) {
+	    vtkMapper *pMapper=pActor->GetMapper();
+	    vtkPolyDataMapper *pPDMapper=dynamic_cast <vtkPolyDataMapper*>(pMapper);
+	    if (pPDMapper){
+	      vtkPolyData *pPolyData=pPDMapper->GetInput();
+	      int aNbC=pPolyData->GetNumberOfCells();
+	      iCount+=aNbC;
+	    }
+	  }
+	}
+      }
+      float aTS1=1./aTS;
+      sprintf(buf, "\n FPS: %.2f \nNbCells: %d ", aTS1, iCount);
+    }
+    SetInput(buf);
+  }
+  //
+  Superclass::RenderOpaqueGeometry(theViewport);
+}
 
 //----------------------------------------------------------------------------
 vtkStandardNewMacro(VVTK_Renderer1);
@@ -66,6 +141,28 @@ VVTK_Renderer1
   //aPlaneProperty->SetOpacity(aSelectedPlaneProperty->GetOpacity()*1.5);
 
   myImplicitFunctionWidget->Delete();
+  //
+  vtkSmartPointer<vtkTextMapper>myTextMapper;
+  myTextMapper=vtkTextMapper::New();
+  myTextActor=VISU_FPSTextActor::New();
+  //
+  myTextMapper->Delete();
+  myTextActor->Delete();
+  //
+  vtkTextProperty *pTextProperty=myTextMapper->GetTextProperty();
+  pTextProperty->SetJustificationToRight();
+  pTextProperty->SetVerticalJustificationToTop();
+  pTextProperty->SetFontSize(10);
+  pTextProperty->SetOpacity (0.75);
+  //
+  myTextActor->SetMapper(myTextMapper.GetPointer());
+  myTextActor->SetPickable(false); 
+  myTextActor->ScaledTextOff();
+  myTextActor->SetAlignmentPoint(8);
+  myTextActor->SetPosition2 (1., 1.);
+  //
+  vtkRenderer* pRenderer=GetDevice();
+  pRenderer->AddActor2D(myTextActor.GetPointer());
 }
 
 VVTK_Renderer1
diff --git a/src/VVTK/VVTK_Renderer.h b/src/VVTK/VVTK_Renderer.h
index 543a919a..c48f7c1c 100644
--- a/src/VVTK/VVTK_Renderer.h
+++ b/src/VVTK/VVTK_Renderer.h
@@ -36,6 +36,9 @@
 class VISU_ImplicitFunctionWidget;
 class vtkImplicitFunction;
 
+class vtkViewport;
+class VISU_FPSTextActor;
+
 //----------------------------------------------------------------------------
 class VVTK_EXPORT VVTK_Renderer1 : public SVTK_Renderer
 {
@@ -67,6 +70,7 @@ class VVTK_EXPORT VVTK_Renderer1 : public SVTK_Renderer
   OnAdjustActors();
 
   vtkSmartPointer<VISU_ImplicitFunctionWidget> myImplicitFunctionWidget;
+  vtkSmartPointer<VISU_FPSTextActor> myTextActor;
 };