[vtkusers] How does one enforce recognition of little endian data in VTK?

[Mathieu Malaterre]

Sanatan,

	Since you are reading from a file you should rather have a look at the 
vtkImageReader class:

http://www.vtk.org/doc/nightly/html/classvtkImageReader.html

Since there is a member function that you need:

vtkImageReader2::SetDataByteOrderToBigEndian()   	

HTH
Mathieu

Sanatan Sahgal wrote:
> Hello,
> 
> I am using VTK on an Intel platform running Windows XP professional. I 
> have a 2 bytes per pixel grayscale image which I wish to display on the 
> screen using VTK.
> 
> My image raw data is in little endian format and when I feed it to VTK I 
> see garbage on the screen because VTK seems to expect it in big endian 
> format. If I swap the bytes and then feed it to VTK the image shows up 
> correctly on my screen.
> 
> I don't want this extra overhead of swapping the bytes. I want VTK to 
> recognize the raw little endian data just as it is. Is there any way to 
> tell VTK that my data is in little endian format and it should read it 
> as such?
> 
> I am using the vtkImageData class. I feed data to the imageData instance 
> as follows:
> imageData->GetPointData()->SetScalars(pixelArrayVtk);
> 
> The pixelArrayVtk instance is of type vtkDataArray and it is setup as 
> follows:
> pixelArrayVtk = CreateVtkDataArray(); //Creates instance of specific 
> VtkDataArray type. Example: vtkShortArray::New()
> pixelArrayVtk->SetVoidArray(imageRawData, totalSamples, 1);
> 
> The imageRawData parameter is a pointer to the memory location which 
> contains the raw image data in little endian format.
> 
> Any help with this issue is appreciated.
> 
> thanks,
> Sanatan
> 
> 
> _______________________________________________
> This is the private VTK discussion list. Please keep messages on-topic. 
> Check the FAQ at: http://www.vtk.org/Wiki/VTK_FAQ
> Follow this link to subscribe/unsubscribe:
> http://www.vtk.org/mailman/listinfo/vtkusers
>