mitkImageVtkMapper2DLookupTableTest.cpp

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/*============================================================================

The Medical Imaging Interaction Toolkit (MITK)

Copyright (c) German Cancer Research Center (DKFZ)
All rights reserved.

Use of this source code is governed by a 3-clause BSD license that can be
found in the LICENSE file.

============================================================================*/

// MITK
#include "mitkRenderingTestHelper.h"
#include "mitkTestingMacros.h"
#include <mitkIOUtil.h>
#include <mitkLookupTable.h>
#include <mitkLookupTableProperty.h>
#include <mitkNodePredicateDataType.h>
#include <mitkRenderingModeProperty.h>

// VTK
#include <vtkLookupTable.h>

int mitkImageVtkMapper2DLookupTableTest(int argc, char *argv[])
{
  try
  {
    mitk::RenderingTestHelper openGlTest(640, 480);
  }
  catch (const mitk::TestNotRunException &e)
  {
    MITK_WARN << "Test not run: " << e.GetDescription();
    return 77;
  }
  // load all arguments into a datastorage, take last argument as reference rendering
  // setup a renderwindow of fixed size X*Y
  // render the datastorage
  // compare rendering to reference image
  MITK_TEST_BEGIN("mitkImageVtkMapper2DLookupTableTest")

  mitk::RenderingTestHelper renderingHelper(640, 480, argc, argv);

  // define an arbitrary lookupTable
  vtkSmartPointer<vtkLookupTable> lookupTable = vtkSmartPointer<vtkLookupTable>::New();
  // use linear interpolation
  lookupTable->SetRampToLinear();
  // use the scalar range of the image to have a nice lookuptable
  lookupTable->SetTableRange(0, 255);
  lookupTable->Build();

  // Fill in a few known colors, the rest will be generated
  lookupTable->SetTableValue(0, 1.0, 0.0, 0.0, 1.0);   // map from red
  lookupTable->SetTableValue(255, 0.0, 0.0, 1.0, 1.0); // to blue

  mitk::LookupTable::Pointer myLookupTable = mitk::LookupTable::New();
  myLookupTable->SetVtkLookupTable(lookupTable);

  // set the rendering mode to use the transfer function
  renderingHelper.SetImageProperty("Image Rendering.Mode",
                                   mitk::RenderingModeProperty::New(mitk::RenderingModeProperty::LOOKUPTABLE_COLOR));
  // set the property for the image
  renderingHelper.SetImageProperty("LookupTable", mitk::LookupTableProperty::New(myLookupTable));

  //### Usage of CompareRenderWindowAgainstReference: See docu of mitkRrenderingTestHelper
  MITK_TEST_CONDITION(renderingHelper.CompareRenderWindowAgainstReference(argc, argv, 20.0) == true,
                      "CompareRenderWindowAgainstReference test result positive?");

  // use this to generate a reference screenshot or save the file:
  if (false)
  {
    renderingHelper.SaveReferenceScreenShot("/media/hdd/thomasHdd/Pictures/tmp/output.png");
  }

  MITK_TEST_END();
}