2 ##########################################################################
4 # Copyright 2011 Jose Fonseca
7 # Permission is hereby granted, free of charge, to any person obtaining a copy
8 # of this software and associated documentation files (the 'Software'), to deal
9 # in the Software without restriction, including without limitation the rights
10 # to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
11 # copies of the Software, and to permit persons to whom the Software is
12 # furnished to do so, subject to the following conditions:
14 # The above copyright notice and this permission notice shall be included in
15 # all copies or substantial portions of the Software.
17 # THE SOFTWARE IS PROVIDED 'AS IS', WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
18 # IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 # FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
20 # AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
21 # LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
22 # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
25 ##########################################################################/
27 '''Run two retrace instances in parallel, comparing generated snapshots.
39 from snapdiff import Comparer
40 from highlight import AutoHighlighter
44 # Null file, to use when we're not interested in subprocesses output
45 if platform.system() == 'Windows':
46 NULL = open('NUL:', 'wt')
48 NULL = open('/dev/null', 'wt')
53 def __init__(self, process):
54 self.process = process
56 def nextSnapshot(self):
57 image, comment = read_pnm(self.process.stdout)
61 callNo = int(comment.strip())
67 self.process.terminate()
69 # Avoid http://bugs.python.org/issue14252
75 def __init__(self, retraceExe, args, env=None):
76 self.retraceExe = retraceExe
80 def _retrace(self, args, stdout=subprocess.PIPE):
85 for name, value in self.env.iteritems():
86 sys.stderr.write('%s=%s ' % (name, value))
87 sys.stderr.write(' '.join(cmd) + '\n')
89 return subprocess.Popen(cmd, env=self.env, stdout=stdout, stderr=NULL)
91 sys.stderr.write('error: failed to execute %s: %s\n' % (cmd[0], ex.strerror))
94 def retrace(self, args):
99 def snapshot(self, call_nos):
100 process = self._retrace([
104 return RetraceRun(process)
106 def dump_state(self, call_no):
107 '''Get the state dump at the specified call no.'''
112 state = jsondiff.load(p.stdout)
114 return state.get('parameters', {})
116 def diff_state(self, ref_call_no, src_call_no, stream):
117 '''Compare the state between two calls.'''
119 ref_state = self.dump_state(ref_call_no)
120 src_state = self.dump_state(src_call_no)
123 differ = jsondiff.Differ(stream)
124 differ.visit(ref_state, src_state)
128 def read_pnm(stream):
129 '''Read a PNM from the stream, and return the image object, and the comment.'''
131 magic = stream.readline()
134 magic = magic.rstrip()
142 raise Exception('Unsupported magic `%s`' % magic)
144 line = stream.readline()
145 while line.startswith('#'):
147 line = stream.readline()
148 width, height = map(int, line.strip().split())
149 maximum = int(stream.readline().strip())
150 assert maximum == 255
151 data = stream.read(height * width * channels)
152 image = Image.frombuffer(mode, (width, height), data, 'raw', mode, 0, 1)
153 return image, comment
156 def parse_env(optparser, entries):
157 '''Translate a list of NAME=VALUE entries into an environment dictionary.'''
162 env = os.environ.copy()
163 for entry in entries:
165 name, var = entry.split('=', 1)
167 optparser.error('invalid environment entry %r' % entry)
178 # Parse command line options
179 optparser = optparse.OptionParser(
180 usage='\n\t%prog [options] -- [glretrace options] <trace>',
182 optparser.add_option(
183 '-r', '--retrace', metavar='PROGRAM',
184 type='string', dest='retrace', default='glretrace',
185 help='retrace command [default: %default]')
186 optparser.add_option(
187 '--ref-driver', metavar='DRIVER',
188 type='string', dest='ref_driver', default=None,
189 help='force reference driver')
190 optparser.add_option(
191 '--src-driver', metavar='DRIVER',
192 type='string', dest='src_driver', default=None,
193 help='force source driver')
194 optparser.add_option(
195 '--ref-arg', metavar='OPTION',
196 type='string', action='append', dest='ref_args', default=[],
197 help='pass argument to reference retrace')
198 optparser.add_option(
199 '--src-arg', metavar='OPTION',
200 type='string', action='append', dest='src_args', default=[],
201 help='pass argument to source retrace')
202 optparser.add_option(
203 '--ref-env', metavar='NAME=VALUE',
204 type='string', action='append', dest='ref_env', default=[],
205 help='add variable to reference environment')
206 optparser.add_option(
207 '--src-env', metavar='NAME=VALUE',
208 type='string', action='append', dest='src_env', default=[],
209 help='add variable to source environment')
210 optparser.add_option(
211 '--diff-prefix', metavar='PATH',
212 type='string', dest='diff_prefix', default='.',
213 help='prefix for the difference images')
214 optparser.add_option(
215 '-t', '--threshold', metavar='BITS',
216 type="float", dest="threshold", default=12.0,
217 help="threshold precision [default: %default]")
218 optparser.add_option(
219 '-S', '--snapshot-frequency', metavar='CALLSET',
220 type="string", dest="snapshot_frequency", default='draw',
221 help="calls to compare [default: %default]")
222 optparser.add_option(
223 '-o', '--output', metavar='FILE',
224 type="string", dest="output",
225 help="output file [default: stdout]")
227 (options, args) = optparser.parse_args(sys.argv[1:])
228 ref_env = parse_env(optparser, options.ref_env)
229 src_env = parse_env(optparser, options.src_env)
231 optparser.error("incorrect number of arguments")
233 if options.ref_driver:
234 options.ref_args.insert(0, '--driver=' + options.ref_driver)
235 if options.src_driver:
236 options.src_args.insert(0, '--driver=' + options.src_driver)
238 refRetracer = Retracer(options.retrace, options.ref_args + args, ref_env)
239 srcRetracer = Retracer(options.retrace, options.src_args + args, src_env)
242 output = open(options.output, 'wt')
246 highligher = AutoHighlighter(output)
248 highligher.write('call\tprecision\n')
252 refRun = refRetracer.snapshot(options.snapshot_frequency)
254 srcRun = srcRetracer.snapshot(options.snapshot_frequency)
257 # Get the reference image
258 refImage, refCallNo = refRun.nextSnapshot()
262 # Get the source image
263 srcImage, srcCallNo = srcRun.nextSnapshot()
267 assert refCallNo == srcCallNo
270 # Compare the two images
271 comparer = Comparer(refImage, srcImage)
272 precision = comparer.precision()
274 mismatch = precision < options.threshold
277 highligher.color(highligher.red)
279 highligher.write('%u\t%f\n' % (callNo, precision))
284 if options.diff_prefix:
285 prefix = os.path.join(options.diff_prefix, '%010u' % callNo)
286 prefix_dir = os.path.dirname(prefix)
287 if not os.path.isdir(prefix_dir):
288 os.makedirs(prefix_dir)
289 refImage.save(prefix + '.ref.png')
290 srcImage.save(prefix + '.src.png')
291 comparer.write_diff(prefix + '.diff.png')
292 if last_bad < last_good:
293 srcRetracer.diff_state(last_good, callNo, output)
305 if __name__ == '__main__':