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      1 # Copyright (c) 2013 The Chromium Authors. All rights reserved.
      2 # Use of this source code is governed by a BSD-style license that can be
      3 # found in the LICENSE file.
      4 
      5 from metrics import smoothness
      6 from metrics import timeline
      7 from telemetry.page import page_measurement
      8 
      9 
     10 class MissingDisplayFrameRateError(page_measurement.MeasurementFailure):
     11   def __init__(self, name):
     12     super(MissingDisplayFrameRateError, self).__init__(
     13         'Missing display frame rate metrics: ' + name)
     14 
     15 
     16 class Smoothness(page_measurement.PageMeasurement):
     17   def __init__(self):
     18     super(Smoothness, self).__init__('smoothness')
     19     self._metric = None
     20 
     21   def AddCommandLineOptions(self, parser):
     22     metric_choices = ['smoothness', 'timeline']
     23     parser.add_option('--metric', dest='metric', type='choice',
     24                       choices=metric_choices,
     25                       default='smoothness',
     26                       help=('Metric to use in the measurement. ' +
     27                             'Supported values: ' + ', '.join(metric_choices)))
     28 
     29   def CustomizeBrowserOptions(self, options):
     30     options.AppendExtraBrowserArgs('--enable-gpu-benchmarking')
     31 
     32   def CanRunForPage(self, page):
     33     return hasattr(page, 'smoothness')
     34 
     35   def WillRunActions(self, page, tab):
     36     if self.options.metric == 'smoothness':
     37       self._metric = smoothness.SmoothnessMetric()
     38     elif self.options.metric == 'timeline':
     39       self._metric = timeline.ThreadTimesTimelineMetric()
     40 
     41     self._metric.Start(page, tab)
     42 
     43     if tab.browser.platform.IsRawDisplayFrameRateSupported():
     44       tab.browser.platform.StartRawDisplayFrameRateMeasurement()
     45 
     46   def DidRunAction(self, page, tab, action):
     47     timeline_marker_name = action.GetTimelineMarkerName()
     48     if self.options.metric == 'smoothness' and timeline_marker_name:
     49       self._metric.AddTimelineMarkerNameToIncludeInMetric(timeline_marker_name)
     50 
     51   def DidRunActions(self, page, tab):
     52     if tab.browser.platform.IsRawDisplayFrameRateSupported():
     53       tab.browser.platform.StopRawDisplayFrameRateMeasurement()
     54     self._metric.Stop(page, tab)
     55 
     56   def MeasurePage(self, page, tab, results):
     57     self._metric.AddResults(tab, results)
     58 
     59     if tab.browser.platform.IsRawDisplayFrameRateSupported():
     60       for r in tab.browser.platform.GetRawDisplayFrameRateMeasurements():
     61         if r.value is None:
     62           raise MissingDisplayFrameRateError(r.name)
     63         results.Add(r.name, r.unit, r.value)
     64