package require vtk

# Image pipeline

vtkTIFFReader image1
  image1 SetFileName "$VTK_DATA_ROOT/Data/beach.tif"

# "beach.tif" image contains ORIENTATION tag which is 
# ORIENTATION_TOPLEFT (row 0 top, col 0 lhs) type. The TIFF 
# reader parses this tag and sets the internal TIFF image 
# orientation accordingly.  To overwrite this orientation with a vtk
# convention of ORIENTATION_BOTLEFT (row 0 bottom, col 0 lhs ), invoke
# SetOrientationType method with parameter value of 4.
  image1 SetOrientationType 4
  image1 Update

vtkStructuredPoints sp
eval sp SetDimensions [[image1 GetOutput] GetDimensions]
eval sp SetExtent [[image1 GetOutput] GetExtent]
sp SetScalarType [[image1 GetOutput] GetScalarType] 
sp SetNumberOfScalarComponents [[image1 GetOutput] GetNumberOfScalarComponents] 
[sp GetPointData] SetScalars [[[image1 GetOutput] GetPointData] GetScalars]

vtkImageLuminance luminance
  luminance SetInput sp

#
# write to the temp directory if possible, otherwise use .
#
set dir "."
if {[info commands "rtTester"] == "rtTester"}  {
   set dir [rtTester GetTempDirectory]
}

# make sure it is writeable first
if {[catch {set channel [open "$dir/test.tmp" "w"]}] == 0 } {
   close $channel
   file delete -force "$dir/test.tmp"

   vtkTIFFWriter tiff1
   tiff1 SetInputConnection [image1 GetOutputPort]
   tiff1 SetFileName "$dir/tiff1.tif"
   
   vtkTIFFWriter tiff2
   tiff2 SetInputConnection [luminance GetOutputPort]
   tiff2 SetFileName "$dir/tiff2.tif"
   
   vtkBMPWriter bmp1
   bmp1 SetInputConnection [image1 GetOutputPort]
   bmp1 SetFileName "$dir/bmp1.bmp"
   
   vtkBMPWriter bmp2
   bmp2 SetInputConnection [luminance GetOutputPort]
   bmp2 SetFileName "$dir/bmp2.bmp"
   
   vtkPNMWriter pnm1
   pnm1 SetInputConnection [image1 GetOutputPort]
   pnm1 SetFileName "$dir/pnm1.pnm"
   
   vtkPNMWriter pnm2
   pnm2 SetInputConnection [luminance GetOutputPort]
   pnm2 SetFileName "$dir/pnm2.pnm"

   vtkPostScriptWriter psw1
   psw1 SetInputConnection [image1 GetOutputPort]
   psw1 SetFileName "$dir/psw1.ps"

   vtkPostScriptWriter psw2
   psw2 SetInputConnection [luminance GetOutputPort]
   psw2 SetFileName "$dir/psw2.ps"

   vtkPNGWriter pngw1
   pngw1 SetInputConnection [image1 GetOutputPort]
   pngw1 SetFileName "$dir/pngw1.png"

   vtkPNGWriter pngw2
   pngw2 SetInputConnection [luminance GetOutputPort]
   pngw2 SetFileName "$dir/pngw2.png"

   vtkJPEGWriter jpgw1
   jpgw1 SetInputConnection [image1 GetOutputPort]
   jpgw1 SetFileName "$dir/jpgw1.jpg"

   vtkJPEGWriter jpgw2
   jpgw2 SetInputConnection [luminance GetOutputPort]
   jpgw2 SetFileName "$dir/jpgw2.jpg"

   tiff1 Write
   tiff2 Write
   bmp1 Write
   bmp2 Write
   pnm1 Write
   pnm2 Write
   psw1 Write
   psw2 Write
   pngw1 Write
   pngw2 Write
   jpgw1 Write
   jpgw2 Write

   file delete -force  "$dir/tiff1.tif"
   file delete -force  "$dir/tiff2.tif"
   file delete -force  "$dir/bmp1.bmp"
   file delete -force  "$dir/bmp2.bmp"
   file delete -force  "$dir/pnm1.pnm"
   file delete -force  "$dir/pnm2.pnm"
   file delete -force  "$dir/psw1.ps"
   file delete -force  "$dir/psw2.ps"
   file delete -force  "$dir/pngw1.png"
   file delete -force  "$dir/pngw2.png"
   file delete -force  "$dir/jpgw1.jpg"
   file delete -force  "$dir/jpgw2.jpg"
}

vtkImageViewer viewer
  viewer SetInputConnection [luminance GetOutputPort]
  viewer SetColorWindow 255
  viewer SetColorLevel 127.5
  viewer Render