sdk/platform-tools/systrace/catapult/telemetry/telemetry/internal/platform/tracing_agent/display_tracing_agent.py

   1 # Copyright 2014 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 telemetry.internal.platform import tracing_agent
   6 from tracing.trace_data import trace_data
   7
   8
   9 class DisplayTracingAgent(tracing_agent.TracingAgent):
  10   def __init__(self, platform_backend):
  11     super(DisplayTracingAgent, self).__init__(platform_backend)
  12
  13   @classmethod
  14   def IsSupported(cls, platform_backend):
  15     return platform_backend.IsDisplayTracingSupported()
  16
  17   def StartAgentTracing(self, config, timeout):
  18     del timeout  # unused
  19     if config.enable_platform_display_trace:
  20       self._platform_backend.StartDisplayTracing()
  21       return True
  22
  23   def StopAgentTracing(self):
  24     # TODO: Split collection and stopping.
  25     pass
  26
  27   def CollectAgentTraceData(self, trace_data_builder, timeout=None):
  28     # TODO: Move stopping to StopAgentTracing.
  29     del timeout
  30     surface_flinger_trace_data = self._platform_backend.StopDisplayTracing()
  31     trace_data_builder.AddTraceFor(
  32           trace_data.SURFACE_FLINGER_PART, surface_flinger_trace_data)