777442d52e
Submitted on behalf of keyar@chromium.org Review URL: https://codereview.appspot.com/6300056/ git-svn-id: http://skia.googlecode.com/svn/trunk@4235 2bbb7eff-a529-9590-31e7-b0007b416f81
131 lines
4.1 KiB
Python
131 lines
4.1 KiB
Python
'''
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Compares the rendererings of serialized SkPictures to expected images.
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Launch with --help to see more information.
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Copyright 2012 Google Inc.
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Use of this source code is governed by a BSD-style license that can be
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found in the LICENSE file.
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'''
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# common Python modules
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import os
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import optparse
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import sys
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import shutil
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import tempfile
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USAGE_STRING = 'Usage: %s inputDir expectedDir [renderDir [diffDir]]'
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HELP_STRING = '''
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Compares the renderings of serialized SkPicture files in inputDir with the
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images in expectedDir.
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'''
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def RunCommand(command):
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"""Run a command.
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@param command the command as a single string
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"""
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print 'running command [%s]...' % command
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os.system(command)
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def FindPathToProgram(program):
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"""Return path to an existing program binary, or raise an exception if we
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cannot find one.
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@param program the name of the program that is being looked for
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"""
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trunk_path = os.path.abspath(os.path.join(os.path.dirname(__file__),
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os.pardir))
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possible_paths = [os.path.join(trunk_path, 'out', 'Release', program),
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os.path.join(trunk_path, 'out', 'Debug', program)]
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for try_path in possible_paths:
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if os.path.isfile(try_path):
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return try_path
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raise Exception('cannot find %s in paths %s; maybe you need to '
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'build %s?' % (program, possible_paths, program))
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def RenderImages(input_dir, render_dir):
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"""Renders the serialized SkPictures.
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Uses the render_pictures program to do the rendering.
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@param input_dir the location to read the serlialized SkPictures
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@param render_dir the location to write out the rendered images
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"""
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renderer_path = FindPathToProgram('render_pictures')
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RunCommand('%s %s %s' % (renderer_path, input_dir, render_dir))
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def DiffImages(expected_dir, comparison_dir, diff_dir):
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"""Diffs the rendered SkPicture images with the baseline images.
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Uses the skdiff program to do the diffing.
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@param expected_dir the location of the baseline images.
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@param comparison_dir the location of the images to comapre with the
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baseline
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@param diff_dir the location to write out the diff results
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"""
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skdiff_path = FindPathToProgram('skdiff')
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RunCommand('%s %s %s %s' %
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(skdiff_path, expected_dir, comparison_dir, diff_dir))
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def Cleanup(options, render_dir, diff_dir):
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"""Deletes any temporary folders and files created.
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@param options The OptionParser object that parsed if render_dir or diff_dir
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was set
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@param render_dir the directory where the rendered images were written
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@param diff_dir the directory where the diff results were written
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"""
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if (not options.render_dir):
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if (os.path.isdir(render_dir)):
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shutil.rmtree(render_dir)
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if (not options.diff_dir):
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if (os.path.isdir(diff_dir)):
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shutil.rmtree(diff_dir)
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def Main(args):
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"""Allow other scripts to call this script with fake command-line args.
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@param The commandline argument list
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"""
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parser = optparse.OptionParser(USAGE_STRING % '%prog' + HELP_STRING)
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parser.add_option('--render_dir', dest='render_dir',
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help = ("specify the location to output the rendered files."
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" Default is a temp directory."))
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parser.add_option('--diff_dir', dest='diff_dir',
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help = ("specify the location to output the diff files."
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" Default is a temp directory."))
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options, arguments = parser.parse_args(args)
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input_dir = arguments[1]
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expected_dir = arguments[2]
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if (options.render_dir):
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render_dir = options.render_dir
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else:
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render_dir = tempfile.mkdtemp()
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if (options.diff_dir):
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diff_dir = options.diff_dir
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else:
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diff_dir = tempfile.mkdtemp()
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try:
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RenderImages(input_dir, render_dir)
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DiffImages(expected_dir, render_dir, diff_dir)
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finally:
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Cleanup(options, render_dir, diff_dir)
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if __name__ == '__main__':
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Main(sys.argv)
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