cc/output/latency_info_swap_promise.cc

   1 // Copyright 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 #include "cc/output/latency_info_swap_promise.h"
   6
   7 #include "base/logging.h"
   8
   9 namespace {
  10 ui::LatencyComponentType DidNotSwapReasonToLatencyComponentType(
  11     cc::SwapPromise::DidNotSwapReason reason) {
  12   switch (reason) {
  13     case cc::SwapPromise::DID_NOT_SWAP_UNKNOWN:
  14     case cc::SwapPromise::SWAP_FAILS:
  15       return ui::INPUT_EVENT_LATENCY_TERMINATED_SWAP_FAILED_COMPONENT;
  16     case cc::SwapPromise::COMMIT_FAILS:
  17       return ui::INPUT_EVENT_LATENCY_TERMINATED_COMMIT_FAILED_COMPONENT;
  18     case cc::SwapPromise::COMMIT_NO_UPDATE:
  19       return ui::INPUT_EVENT_LATENCY_TERMINATED_COMMIT_NO_UPDATE_COMPONENT;
  20   }
  21   NOTREACHED() << "Unhandled DidNotSwapReason.";
  22   return ui::INPUT_EVENT_LATENCY_TERMINATED_SWAP_FAILED_COMPONENT;
  23 }
  24 }  // namespace
  25
  26 namespace cc {
  27
  28 LatencyInfoSwapPromise::LatencyInfoSwapPromise(const ui::LatencyInfo& latency)
  29     : latency_(latency) {
  30 }
  31
  32 LatencyInfoSwapPromise::~LatencyInfoSwapPromise() {
  33 }
  34
  35 void LatencyInfoSwapPromise::DidSwap(CompositorFrameMetadata* metadata) {
  36   DCHECK(!latency_.terminated);
  37   metadata->latency_info.push_back(latency_);
  38 }
  39
  40 void LatencyInfoSwapPromise::DidNotSwap(DidNotSwapReason reason) {
  41   latency_.AddLatencyNumber(DidNotSwapReasonToLatencyComponentType(reason), 0,
  42                             0);
  43   // TODO(miletus): Turn this back on once per-event LatencyInfo tracking
  44   // is enabled in GPU side.
  45   // DCHECK(latency_.terminated);
  46 }
  47
  48 int64 LatencyInfoSwapPromise::TraceId() const {
  49   return latency_.trace_id;
  50 }
  51
  52 }  // namespace cc