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// SPDX-FileCopyrightText: Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
// SPDX-License-Identifier: BSD-3-Clause
/*
Test NIFTI-2 support in VTK.
*/
#include "vtkNew.h"
#include "vtkRegressionTestImage.h"
#include "vtkTestUtilities.h"
#include "vtkCamera.h"
#include "vtkImageData.h"
#include "vtkImageMathematics.h"
#include "vtkImageProperty.h"
#include "vtkImageSlice.h"
#include "vtkImageSliceMapper.h"
#include "vtkRenderWindow.h"
#include "vtkRenderWindowInteractor.h"
#include "vtkRenderer.h"
#include "vtkNIFTIImageHeader.h"
#include "vtkNIFTIImageReader.h"
#include "vtkNIFTIImageWriter.h"
#include <string>
static const char* dispfile = "Data/avg152T1_RL_nifti2.nii.gz";
static void TestDisplay(vtkRenderWindow* renwin, const char* infile, const char* tempDir)
{
std::string outpath = tempDir;
outpath += "/";
outpath += "avg152T1_RL_nifti2.nii.gz";
vtkNew<vtkNIFTIImageReader> reader1;
if (!reader1->CanReadFile(infile))
{
cerr << "CanReadFile failed for " << infile << "\n";
exit(1);
}
reader1->SetFileName(infile);
reader1->Update();
vtkNew<vtkNIFTIImageWriter> writer;
writer->SetInputConnection(reader1->GetOutputPort());
writer->SetFileName(outpath.c_str());
writer->SetNIFTIHeader(reader1->GetNIFTIHeader());
writer->SetSFormMatrix(reader1->GetSFormMatrix());
writer->SetNIFTIVersion(2);
writer->Update();
vtkNew<vtkNIFTIImageReader> reader;
reader->SetFileName(outpath.c_str());
reader->Update();
vtkNIFTIImageHeader* header = reader->GetNIFTIHeader();
std::string magic = header->GetMagic();
if (magic != "n+2")
{
cerr << "File is not a NIFTIv2 file\n";
exit(1);
}
int size[3];
double center[3], spacing[3];
reader->GetOutput()->GetDimensions(size);
reader->GetOutput()->GetCenter(center);
reader->GetOutput()->GetSpacing(spacing);
double center1[3] = { center[0], center[1], center[2] };
double center2[3] = { center[0], center[1], center[2] };
if (size[2] % 2 == 1)
{
center1[2] += 0.5 * spacing[2];
}
if (size[0] % 2 == 1)
{
center2[0] += 0.5 * spacing[0];
}
double vrange[2];
reader->GetOutput()->GetScalarRange(vrange);
vtkNew<vtkImageSliceMapper> map1;
map1->BorderOn();
map1->SliceAtFocalPointOn();
map1->SliceFacesCameraOn();
map1->SetInputConnection(reader->GetOutputPort());
vtkNew<vtkImageSliceMapper> map2;
map2->BorderOn();
map2->SliceAtFocalPointOn();
map2->SliceFacesCameraOn();
map2->SetInputConnection(reader->GetOutputPort());
vtkNew<vtkImageSlice> slice1;
slice1->SetMapper(map1);
slice1->GetProperty()->SetColorWindow(vrange[1] - vrange[0]);
slice1->GetProperty()->SetColorLevel(0.5 * (vrange[0] + vrange[1]));
vtkNew<vtkImageSlice> slice2;
slice2->SetMapper(map2);
slice2->GetProperty()->SetColorWindow(vrange[1] - vrange[0]);
slice2->GetProperty()->SetColorLevel(0.5 * (vrange[0] + vrange[1]));
double ratio = size[0] * 1.0 / (size[0] + size[2]);
vtkNew<vtkRenderer> ren1;
ren1->SetViewport(0, 0, ratio, 1.0);
vtkNew<vtkRenderer> ren2;
ren2->SetViewport(ratio, 0.0, 1.0, 1.0);
ren1->AddViewProp(slice1);
ren2->AddViewProp(slice2);
vtkCamera* cam1 = ren1->GetActiveCamera();
cam1->ParallelProjectionOn();
cam1->SetParallelScale(0.5 * spacing[1] * size[1]);
cam1->SetFocalPoint(center1[0], center1[1], center1[2]);
cam1->SetPosition(center1[0], center1[1], center1[2] - 100.0);
vtkCamera* cam2 = ren2->GetActiveCamera();
cam2->ParallelProjectionOn();
cam2->SetParallelScale(0.5 * spacing[1] * size[1]);
cam2->SetFocalPoint(center2[0], center2[1], center2[2]);
cam2->SetPosition(center2[0] + 100.0, center2[1], center2[2]);
renwin->SetSize(size[0] + size[2], size[1]);
renwin->AddRenderer(ren1);
renwin->AddRenderer(ren2);
}
int TestNIFTI2(int argc, char* argv[])
{
// perform the display test
char* infile = vtkTestUtilities::ExpandDataFileName(argc, argv, dispfile);
if (!infile)
{
cerr << "Could not locate input file " << dispfile << "\n";
return 1;
}
std::string inpath = infile;
delete[] infile;
char* tempDir =
vtkTestUtilities::GetArgOrEnvOrDefault("-T", argc, argv, "VTK_TEMP_DIR", "Testing/Temporary");
if (!tempDir)
{
cerr << "Could not determine temporary directory.\n";
return 1;
}
std::string tmppath = tempDir;
delete[] tempDir;
vtkNew<vtkRenderWindow> renwin;
vtkNew<vtkRenderWindowInteractor> iren;
iren->SetRenderWindow(renwin);
TestDisplay(renwin, inpath.c_str(), tmppath.c_str());
int retVal = vtkRegressionTestImage(renwin);
if (retVal == vtkRegressionTester::DO_INTERACTOR)
{
renwin->Render();
iren->Start();
retVal = vtkRegressionTester::PASSED;
}
return (retVal != vtkRegressionTester::PASSED);
}
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