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https://github.com/OpenFOAM/ThirdParty-6.git
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296 lines
10 KiB
Python
296 lines
10 KiB
Python
#==============================================================================
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# Copyright (c) 2015, Kitware Inc., Los Alamos National Laboratory
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# All rights reserved.
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#
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# Redistribution and use in source and binary forms, with or without modification,
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# are permitted provided that the following conditions are met:
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#
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# 1. Redistributions of source code must retain the above copyright notice, this
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# list of conditions and the following disclaimer.
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#
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# 2. Redistributions in binary form must reproduce the above copyright notice, this
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# list of conditions and the following disclaimer in the documentation and/or other
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# materials provided with the distribution.
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#
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# 3. Neither the name of the copyright holder nor the names of its contributors may
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# be used to endorse or promote products derived from this software without specific
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# prior written permission.
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#
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# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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# IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
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# INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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# NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
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# OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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# WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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# POSSIBILITY OF SUCH DAMAGE.
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#==============================================================================
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"""
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Module that uses one of the available back end libraries to write out image
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files for cinema's file store class.
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"""
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import numpy
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import os
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import warnings
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exrEnabled = False
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try:
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import OexrHelper as exr
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exrEnabled = True
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print "Imported OpenEXR, will default to *.exr in z-buffer images."
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except ImportError:
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pass
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pilEnabled = False
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try:
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import PIL.Image
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import PIL.ImImagePlugin
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pilEnabled = True
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except ImportError:
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pass
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vtkEnabled = False
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try:
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import sys
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if "paraview" in sys.modules:
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import paraview.vtk
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import paraview.vtk.vtkIOImage
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from paraview.vtk.vtkIOImage import (vtkPNGReader,
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vtkBMPReader,
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vtkPNMReader,
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vtkTIFFReader,
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vtkJPEGReader,
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vtkPNGWriter,
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vtkBMPWriter,
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vtkPNMWriter,
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vtkTIFFWriter,
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vtkJPEGWriter)
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from paraview.vtk.vtkCommonDataModel import vtkImageData
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from paraview import numpy_support as n2v
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else:
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import vtk
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from vtk import (vtkPNGReader,
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vtkBMPReader,
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vtkPNMReader,
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vtkTIFFReader,
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vtkJPEGReader,
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vtkPNGWriter,
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vtkBMPWriter,
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vtkPNMWriter,
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vtkTIFFWriter,
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vtkJPEGWriter,
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vtkImageData)
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from vtk.util import numpy_support as n2v
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vtkEnabled = True
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except ImportError:
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pass
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class RasterWrangler(object):
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"""
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Isolates the specifics of raster file formats from the cinema store.
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In particular this delegates the task to one or more subsidiary modules.
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The choice of which is open to facilitate packaging in different
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places, i.e. PIL for desktop and small packages, VTK for HPC contexts.
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"""
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def __init__(self):
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self.backends = set()
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if exrEnabled:
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self.backends.add("OpenEXR")
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elif pilEnabled:
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self.backends.add("PIL")
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elif vtkEnabled:
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self.backends.add("VTK")
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def enableOpenEXR(self):
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if exrEnabled:
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self.backends.add("OpenEXR")
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else:
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warnings.warn("OpenEXR module not found", ImportWarning)
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def enablePIL(self):
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if pilEnabled:
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self.backends.add("PIL")
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else:
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warnings.warn("PIL module not found", ImportWarning)
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def enableVTK(self):
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if vtkEnabled:
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self.backends.add("VTK")
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else:
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warnings.warn("VTK module not found", ImportWarning)
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def _make_writer(self,filename):
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"Internal function."
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extension = None
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parts = filename.split('.')
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if len(parts) > 1:
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extension = parts[-1]
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else:
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raise RuntimeError, "Filename has no extension, cannot guess writer to use"
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if extension == 'png':
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return vtkPNGWriter()
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elif extension == 'bmp':
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return vtkBMPWriter()
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elif extension == 'ppm':
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return vtkPNMWriter()
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elif extension == 'tif' or extension == 'tiff':
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return vtkTIFFWriter()
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elif extension == 'jpg' or extension == 'jpeg':
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return vtkJPEGWriter()
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elif extension == 'vti':
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return vtkXMLImageDataWriter()
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else:
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raise RuntimeError, "Cannot infer filetype from extension:", extension
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def _make_reader(self,filename):
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"Internal function."
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extension = None
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parts = filename.split('.')
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if len(parts) > 1:
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extension = parts[-1]
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else:
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raise RuntimeError, "Filename has no extension, please guess reader to use"
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if extension == 'png':
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return vtkPNGReader()
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elif extension == 'bmp':
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return vtkBMPReader()
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elif extension == 'ppm':
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return vtkPNMReader()
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elif extension == 'tif' or extension == 'tiff':
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return vtkTIFFReader()
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elif extension == 'jpg' or extension == 'jpeg':
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return vtkJPEGReader()
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elif extension == 'vti':
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return vtkXMLImageDataReader()
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else:
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raise RuntimeError, "Cannot infer filetype from extension:", extension
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def genericreader(self, fname):
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with open(fname, "r") as file:
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return file.read()
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def genericwriter(self, imageslice, fname):
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with open(fname, "w") as file:
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file.write(imageslice)
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def rgbreader(self, fname):
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if "VTK" in self.backends:
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height = imageslice.shape[1]
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width = imageslice.shape[0]
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contig = imageslice.reshape(height*width,3)
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vtkarray = n2v.numpy_to_vtk(contig)
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id = vtkImageData()
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id.SetExtent(0, height-1, 0, width-1, 0, 0)
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id.GetPointData().SetScalars(vtkarray)
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writer = self._make_writer(fname)
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writer.SetInputData(id)
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writer.SetFileName(fname)
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writer.Write()
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elif "PIL" in self.backends:
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im = PIL.Image.open(fname)
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return numpy.array(im, numpy.uint8).reshape(im.size[1],im.size[0],3)
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else:
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print "Warning: need PIL or VTK to read from " + fname
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def rgbwriter(self, imageslice, fname):
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if "VTK" in self.backends:
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height = imageslice.shape[1]
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width = imageslice.shape[0]
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contig = imageslice.reshape(height*width,3)
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vtkarray = n2v.numpy_to_vtk(contig)
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id = vtkImageData()
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id.SetExtent(0, height-1, 0, width-1, 0, 0)
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id.GetPointData().SetScalars(vtkarray)
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writer = self._make_writer(fname)
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writer.SetInputData(id)
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writer.SetFileName(fname)
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writer.Write()
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elif "PIL" in self.backends:
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imageslice = numpy.flipud(imageslice)
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pimg = PIL.Image.fromarray(imageslice)
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pimg.save(fname)
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else:
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print "Warning: need PIL or VTK to write to " + fname
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def zfileextension(self):
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if "OpenEXR" in self.backends:
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return ".exr"
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else:
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return ".im"
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def zreader(self, fname):
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if "OpenEXR" in self.backends:
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return exr.load_depth(fname)
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elif "PIL" in self.backends:
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im = PIL.Image.open(fname)
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return numpy.array(im, numpy.float32).reshape(im.size[1],im.size[0])
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else:
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print "Warning: need OpenEXR or PIL to read from " + fname
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def zwriter(self, imageslice, fname):
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if "OpenEXR" in self.backends:
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imageslice = numpy.flipud(imageslice)
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exr.save_depth(imageslice, fname)
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elif "VTK" in self.backends:
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height = imageslice.shape[1]
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width = imageslice.shape[0]
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file = open(fname, mode='w')
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file.write("Image type: L 32F image\r\n")
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file.write("Name: A cinema depth image\r\n")
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file.write("Image size (x*y): "+str(height) + "*" + str(width) + "\r\n")
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file.write("File size (no of images): 1\r\n")
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file.write(chr(26))
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imageslice.tofile(file)
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file.close()
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elif "PIL" in self.backends:
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imageslice = numpy.flipud(imageslice)
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pimg = PIL.Image.fromarray(imageslice)
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#TODO:
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# don't let ImImagePlugin.py insert the Name: filename in line two
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# why? because ImImagePlugin.py reader has a 100 character limit
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pimg.save(fname)
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else:
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print "Warning: need OpenEXR or PIL or VTK to write to " + fname
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def assertvalidimage(self, filename):
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if not os.path.isfile(filename):
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raise IOError(filename + " does not exist.")
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if "OpenEXR" in self.backends:
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if not exr.isOpenExrFile(filename):
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raise IOError(filename + " cannot be opened using OpenEXR.")
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elif "VTK" in self.backends:
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reader = self._make_reader(filename)
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if not reader.CanReadFile(filename):
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raise IOError("VTK Cannot open file " + filename)
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elif "PIL" in self.backends:
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try:
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PIL.Image.open(filename)
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except IOError:
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raise
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else:
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raise RuntimeError(
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"Warning: need OpenEXR or PIL or VTK to validate file store")
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