1 #include "vtkAutoInit.h"
2 VTK_MODULE_INIT(vtkRenderingOpenGL2);
3 VTK_MODULE_INIT(vtkInteractionStyle);
4 #include <vtkSmartPointer.h>
5 #include <vtkImageViewer2.h>
6 #include <vtkRenderWindow.h>
7 #include <vtkRenderWindowInteractor.h>
8 #include <vtkRenderer.h>
9 #include <vtkBMPReader.h>
10 #include <vtkImageData.h>
11 #include <vtkImageIterator.h>
12
13 //测试图像：../data/lena.bmp
14 int main(int argc, char* argv[])
15 {
16 vtkSmartPointer<vtkBMPReader> reader =
17 vtkSmartPointer<vtkBMPReader>::New();
18 reader->SetFileName ( "lena.bmp" );
19 reader->Update();
20
21 int subRegion[6] = {0,300, 0, 300, 0, 0};
22 vtkImageIterator<unsigned char> it(reader->GetOutput(), subRegion);
23
24 while(!it.IsAtEnd())
25 {
26 unsigned char *inSI = it.BeginSpan();
27 unsigned char *inSIEnd = it.EndSpan();
28
29 while(inSI != inSIEnd)
30 {
31 *inSI = 255-*inSI;
32 ++inSI;
33 }
34 it.NextSpan();
35 }
36
37 vtkSmartPointer<vtkImageViewer2> imageViewer =
38 vtkSmartPointer<vtkImageViewer2>::New();
39 imageViewer->SetInputConnection(reader->GetOutputPort());
40
41 vtkSmartPointer<vtkRenderWindowInteractor> renderWindowInteractor =
42 vtkSmartPointer<vtkRenderWindowInteractor>::New();
43 imageViewer->SetupInteractor(renderWindowInteractor);
44 imageViewer->Render();
45 imageViewer->GetRenderer()->ResetCamera();
46 imageViewer->Render();
47
48 imageViewer->GetRenderer()->SetBackground(1.0, 1.0, 1.0);
49 imageViewer->SetSize(640, 480);
50 imageViewer->GetRenderWindow()->SetWindowName("VisitImagePixelIterativelyExample");
51
52 renderWindowInteractor->Start();
53
54 return 0;
55 }
