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# ReadBMP

VTKEx/Java/IO/ReadBMP

### Description

vtkBMPReader is a source object that reads Windows BMP files. This includes indexed and 24 bit bitmaps Usually, all BMPs are converted to 24 bit RGB, but BMPs may be output as 8 bit images with a LookupTable if they allow 8 bit BMP flag is set.

BMPReader creates structured point datasets. The dimension of the dataset depends upon the number of files read. Reading a single file results in a 2D image, while reading more than one file results in a 3D volume.

Other languages

See (Cxx), (CSharp)

Question

If you have a simple question about this example contact us at VTKExProject If your question is more complex and may require extended discussion, please use the VTK Discourse Forum

### Code

ReadBMP.java

    import vtk.vtkNativeLibrary;
    import vtk.vtkRenderWindowInteractor;
    import vtk.vtkImageViewer2;
    import vtk.vtkBMPReader;

    public class ReadBMP
    {
      // -----------------------------------------------------------------
      // Load VTK library and print which library was not properly loaded
      static
      {
        if (!vtkNativeLibrary.LoadAllNativeLibraries())
        {
          for (vtkNativeLibrary lib : vtkNativeLibrary.values())
          {
            if (!lib.IsLoaded())
            {
              System.out.println(lib.GetLibraryName() + " not loaded");
            }
          }
        }
        vtkNativeLibrary.DisableOutputWindow(null);
      }
      // -----------------------------------------------------------------

      public static void main(String args[])
      {

        //parse command line arguments
        if (args.length != 1)
        {
          System.err.println("Usage: java -classpath ... Filename(.bmp) e.g masonry.bmp");
          return;
        }
        String inputFilename = args[0];

        vtkBMPReader reader = new vtkBMPReader();
        reader.SetFileName(inputFilename);
        reader.Update();

        // Visualize
        vtkImageViewer2 imageViewer = new vtkImageViewer2();
        imageViewer.SetInputConnection(reader.GetOutputPort());
        vtkRenderWindowInteractor renderWindowInteractor =new vtkRenderWindowInteractor();
        imageViewer.SetupInteractor(renderWindowInteractor);
        imageViewer.Render();
        imageViewer.GetRenderer().ResetCamera();
        imageViewer.Render();

        renderWindowInteractor.Start();

       }
    }