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#!/usr/bin/env python
# -*- coding: utf-8 -*-
'''
=========================================================================
Program: Visualization Toolkit
Module: TestBufferedRenderWindowExporter.py
Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
All rights reserved.
See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
This software is distributed WITHOUT ANY WARRANTY; without even
the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
PURPOSE. See the above copyright notice for more information.
=========================================================================
'''
import ctypes
import io
import json
from random import random, seed
import shutil
import vtk
import vtk.test.Testing
from vtk.util.misc import vtkGetTempDir
import zipfile
VTK_TEMP_DIR = vtkGetTempDir()
# Construct a render window and write it to disk and to buffer. Decompress the
# buffer and compare its contents to the files on disk.
class TestBufferedRenderWindowExporter(vtk.test.Testing.vtkTest):
def testBufferedRenderWindowExporter(self):
cone = vtk.vtkConeSource()
coneMapper = vtk.vtkPolyDataMapper()
coneMapper.SetInputConnection(cone.GetOutputPort())
coneActor = vtk.vtkActor()
coneActor.SetMapper(coneMapper)
ren = vtk.vtkRenderer()
ren.AddActor(coneActor)
renWin = vtk.vtkRenderWindow()
renWin.AddRenderer(ren)
ren.ResetCamera()
renWin.Render()
seed(0)
archiveName = VTK_TEMP_DIR + '/scene_' + str(random())
exporter = vtk.vtkJSONRenderWindowExporter()
exporter.GetArchiver().SetArchiveName(archiveName)
exporter.SetRenderWindow(renWin)
exporter.Write()
bufferedExporter = vtk.vtkJSONRenderWindowExporter()
bufferedArchiver = vtk.vtkBufferedArchiver()
bufferedExporter.SetArchiver(bufferedArchiver)
bufferedExporter.SetRenderWindow(renWin)
bufferedExporter.Write()
ptr = bufferedArchiver.GetBufferAddress()
address = int(ptr[1:-7], 16)
ArrayType = ctypes.c_byte*bufferedArchiver.GetBufferSize()
b = ArrayType.from_address(address)
stream = io.BytesIO(b)
with zipfile.ZipFile(stream) as zf:
for info in zf.infolist():
data = zf.read(info.filename)
fdata = open(archiveName + '/' + info.filename, 'rb').read()
if data != fdata:
print('Buffered file %s does not match file on disk' % info.filename)
exit(1)
shutil.rmtree(archiveName)
if __name__ == "__main__":
vtk.test.Testing.main([(TestBufferedRenderWindowExporter, 'test')])
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