summaryrefslogtreecommitdiff
path: root/Tools/Scripts/webkitpy/port/image_diff.py
diff options
context:
space:
mode:
Diffstat (limited to 'Tools/Scripts/webkitpy/port/image_diff.py')
-rw-r--r--Tools/Scripts/webkitpy/port/image_diff.py118
1 files changed, 0 insertions, 118 deletions
diff --git a/Tools/Scripts/webkitpy/port/image_diff.py b/Tools/Scripts/webkitpy/port/image_diff.py
deleted file mode 100644
index 4f1b059b4..000000000
--- a/Tools/Scripts/webkitpy/port/image_diff.py
+++ /dev/null
@@ -1,118 +0,0 @@
-# Copyright (C) 2010 Google Inc. All rights reserved.
-# Copyright (C) 2010 Gabor Rapcsanyi <rgabor@inf.u-szeged.hu>, University of Szeged
-# Copyright (C) 2011, 2012 Apple Inc. All rights reserved.
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions are
-# met:
-#
-# * Redistributions of source code must retain the above copyright
-# notice, this list of conditions and the following disclaimer.
-# * Redistributions in binary form must reproduce the above
-# copyright notice, this list of conditions and the following disclaimer
-# in the documentation and/or other materials provided with the
-# distribution.
-# * Neither the Google name nor the names of its
-# contributors may be used to endorse or promote products derived from
-# this software without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-"""WebKit implementations of the Port interface."""
-
-import logging
-import re
-import time
-
-from webkitpy.port import server_process
-
-
-_log = logging.getLogger(__name__)
-
-
-class ImageDiffer(object):
- def __init__(self, port):
- self._port = port
- self._tolerance = None
- self._process = None
-
- def diff_image(self, expected_contents, actual_contents, tolerance):
- if tolerance != self._tolerance:
- self.stop()
- try:
- assert(expected_contents)
- assert(actual_contents)
- assert(tolerance is not None)
-
- if not self._process:
- self._start(tolerance)
- # Note that although we are handed 'old', 'new', ImageDiff wants 'new', 'old'.
- self._process.write('Content-Length: %d\n%sContent-Length: %d\n%s' % (
- len(actual_contents), actual_contents,
- len(expected_contents), expected_contents))
- return self._read()
- except IOError as exception:
- return (None, 0, "Failed to compute an image diff: %s" % str(exception))
-
- def _start(self, tolerance):
- command = [self._port._path_to_image_diff(), '--tolerance', str(tolerance)]
- environment = self._port.setup_environ_for_server('ImageDiff')
- self._process = self._port._server_process_constructor(self._port, 'ImageDiff', command, environment)
- self._process.start()
- self._tolerance = tolerance
-
- def _read(self):
- deadline = time.time() + 2.0
- output = None
- output_image = ""
-
- while not self._process.timed_out and not self._process.has_crashed():
- output = self._process.read_stdout_line(deadline)
- if self._process.timed_out or self._process.has_crashed() or not output:
- break
-
- if output.startswith('diff'): # This is the last line ImageDiff prints.
- break
-
- if output.startswith('Content-Length'):
- m = re.match('Content-Length: (\d+)', output)
- content_length = int(m.group(1))
- output_image = self._process.read_stdout(deadline, content_length)
- output = self._process.read_stdout_line(deadline)
- break
-
- stderr = self._process.pop_all_buffered_stderr()
- err_str = ''
- if stderr:
- err_str += "ImageDiff produced stderr output:\n" + stderr
- if self._process.timed_out:
- err_str += "ImageDiff timed out\n"
- if self._process.has_crashed():
- err_str += "ImageDiff crashed\n"
-
- # FIXME: There is no need to shut down the ImageDiff server after every diff.
- self._process.stop()
-
- diff_percent = 0
- if output and output.startswith('diff'):
- m = re.match('diff: (.+)% (passed|failed)', output)
- if m.group(2) == 'passed':
- return (None, 0, None)
- diff_percent = float(m.group(1))
-
- return (output_image, diff_percent, err_str or None)
-
- def stop(self):
- if self._process:
- self._process.stop()
- self._process = None