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/*=========================================================================
Program: Visualization Toolkit
Module: TestGaussianBlurPass.cxx
Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
All rights reserved.
See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
This software is distributed WITHOUT ANY WARRANTY; without even
the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
PURPOSE. See the above copyright notice for more information.
=========================================================================*/
// This test covers the gaussian blur post-processing render pass.
// It renders an actor with a translucent LUT and depth
// peeling using the multi renderpass classes. The mapper uses color
// interpolation (poor quality).
//
// The command line arguments are:
// -I => run in interactive mode; unless this is used, the program will
// not allow interaction and exit
#include "vtkTestUtilities.h"
#include "vtkRegressionTestImage.h"
#include "vtkSmartPointer.h"
#include "vtkRenderWindowInteractor.h"
#include "vtkRenderWindow.h"
#include "vtkOpenGLRenderer.h"
#include "vtkActor.h"
#include "vtkImageSinusoidSource.h"
#include "vtkImageData.h"
#include "vtkImageDataGeometryFilter.h"
#include "vtkDataSetSurfaceFilter.h"
#include "vtkPolyDataMapper.h"
#include "vtkLookupTable.h"
#include "vtkCamera.h"
#include "vtkCameraPass.h"
#include "vtkLightsPass.h"
#include "vtkSequencePass.h"
#include "vtkOpaquePass.h"
#include "vtkDepthPeelingPass.h"
#include "vtkTranslucentPass.h"
#include "vtkVolumetricPass.h"
#include "vtkOverlayPass.h"
#include "vtkRenderPassCollection.h"
#include "vtkGaussianBlurPass.h"
#include "vtkConeSource.h"
// Make sure to have a valid OpenGL context current on the calling thread
// before calling it. Defined in TestGenericVertexAttributesGLSLAlphaBlending.
bool MesaHasVTKBug8135(vtkRenderWindow *);
int TestGaussianBlurPass(int argc, char* argv[])
{
vtkSmartPointer<vtkRenderWindowInteractor> iren=
vtkSmartPointer<vtkRenderWindowInteractor>::New();
vtkSmartPointer<vtkRenderWindow> renWin =
vtkSmartPointer<vtkRenderWindow>::New();
renWin->SetMultiSamples(0);
renWin->SetAlphaBitPlanes(1);
iren->SetRenderWindow(renWin);
vtkSmartPointer<vtkRenderer> renderer =
vtkSmartPointer<vtkRenderer>::New();
renWin->AddRenderer(renderer);
vtkOpenGLRenderer *glrenderer =
vtkOpenGLRenderer::SafeDownCast(renderer.GetPointer());
vtkSmartPointer<vtkCameraPass> cameraP=
vtkSmartPointer<vtkCameraPass>::New();
vtkSmartPointer<vtkSequencePass> seq=
vtkSmartPointer<vtkSequencePass>::New();
vtkSmartPointer<vtkOpaquePass> opaque=
vtkSmartPointer<vtkOpaquePass>::New();
vtkSmartPointer<vtkDepthPeelingPass> peeling=
vtkSmartPointer<vtkDepthPeelingPass>::New();
peeling->SetMaximumNumberOfPeels(200);
peeling->SetOcclusionRatio(0.1);
vtkSmartPointer<vtkTranslucentPass> translucent=
vtkSmartPointer<vtkTranslucentPass>::New();
peeling->SetTranslucentPass(translucent);
vtkSmartPointer<vtkVolumetricPass> volume=
vtkSmartPointer<vtkVolumetricPass>::New();
vtkSmartPointer<vtkOverlayPass> overlay=
vtkSmartPointer<vtkOverlayPass>::New();
vtkSmartPointer<vtkLightsPass> lights=
vtkSmartPointer<vtkLightsPass>::New();
vtkSmartPointer<vtkRenderPassCollection> passes=
vtkSmartPointer<vtkRenderPassCollection>::New();
passes->AddItem(lights);
passes->AddItem(opaque);
passes->AddItem(peeling);
// passes->AddItem(translucent);
passes->AddItem(volume);
passes->AddItem(overlay);
seq->SetPasses(passes);
cameraP->SetDelegatePass(seq);
vtkSmartPointer<vtkGaussianBlurPass> blurP=
vtkSmartPointer<vtkGaussianBlurPass>::New();
blurP->SetDelegatePass(cameraP);
glrenderer->SetPass(blurP);
// renderer->SetPass(cameraP);
vtkSmartPointer<vtkImageSinusoidSource> imageSource=
vtkSmartPointer<vtkImageSinusoidSource>::New();
imageSource->SetWholeExtent(0,9,0,9,0,9);
imageSource->SetPeriod(5);
imageSource->Update();
vtkImageData *image=imageSource->GetOutput();
double range[2];
image->GetScalarRange(range);
vtkSmartPointer<vtkDataSetSurfaceFilter> surface=
vtkSmartPointer<vtkDataSetSurfaceFilter>::New();
surface->SetInputConnection(imageSource->GetOutputPort());
vtkSmartPointer<vtkPolyDataMapper> mapper=
vtkSmartPointer<vtkPolyDataMapper>::New();
mapper->SetInputConnection(surface->GetOutputPort());
vtkSmartPointer<vtkLookupTable> lut=
vtkSmartPointer<vtkLookupTable>::New();
lut->SetTableRange(range);
lut->SetAlphaRange(0.5,0.5);
lut->SetHueRange(0.2,0.7);
lut->SetNumberOfTableValues(256);
lut->Build();
mapper->SetScalarVisibility(1);
mapper->SetLookupTable(lut);
vtkSmartPointer<vtkActor> actor=
vtkSmartPointer<vtkActor>::New();
renderer->AddActor(actor);
actor->SetMapper(mapper);
actor->SetVisibility(1);
vtkSmartPointer<vtkConeSource> cone=
vtkSmartPointer<vtkConeSource>::New();
vtkSmartPointer<vtkPolyDataMapper> coneMapper=
vtkSmartPointer<vtkPolyDataMapper>::New();
coneMapper->SetInputConnection(cone->GetOutputPort());
coneMapper->SetImmediateModeRendering(1);
vtkSmartPointer<vtkActor> coneActor=
vtkSmartPointer<vtkActor>::New();
coneActor->SetMapper(coneMapper);
coneActor->SetVisibility(1);
renderer->AddActor(coneActor);
renderer->SetBackground(0.1,0.3,0.0);
renWin->SetSize(400,400);
// empty scene during OpenGL detection.
actor->SetVisibility(0);
coneActor->SetVisibility(0);
renWin->Render();
int retVal;
if(MesaHasVTKBug8135(renWin))
{
// Mesa will crash if version<7.3
cout<<"This version of Mesa would crash. Skip the test."<<endl;
retVal=vtkRegressionTester::PASSED;
}
else
{
actor->SetVisibility(1);
coneActor->SetVisibility(1);
renderer->ResetCamera();
vtkCamera *camera=renderer->GetActiveCamera();
camera->Azimuth(-40.0);
camera->Elevation(20.0);
renWin->Render();
if(peeling->GetLastRenderingUsedDepthPeeling())
{
cout<<"depth peeling was used"<<endl;
}
else
{
cout<<"depth peeling was not used (alpha blending instead)"<<endl;
}
retVal = vtkRegressionTestImage( renWin );
if ( retVal == vtkRegressionTester::DO_INTERACTOR)
{
iren->Start();
}
}
return !retVal;
}
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