cc/base/latency_info_swap_promise_monitor.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/base/latency_info_swap_promise_monitor.h"
   6
   7 #include "base/threading/platform_thread.h"
   8 #include "cc/base/latency_info_swap_promise.h"
   9 #include "cc/trees/layer_tree_host.h"
  10 #include "cc/trees/layer_tree_host_impl.h"
  11 #include "cc/trees/layer_tree_impl.h"
  12
  13 namespace {
  14
  15 bool AddRenderingScheduledComponent(ui::LatencyInfo* latency_info,
  16                                     bool on_main) {
  17   ui::LatencyComponentType type = on_main ?
  18       ui::INPUT_EVENT_LATENCY_RENDERING_SCHEDULED_MAIN_COMPONENT :
  19       ui::INPUT_EVENT_LATENCY_RENDERING_SCHEDULED_IMPL_COMPONENT;
  20   if (latency_info->FindLatency(type, 0, nullptr))
  21     return false;
  22   latency_info->AddLatencyNumber(type, 0, 0);
  23   return true;
  24 }
  25
  26 bool AddForwardingScrollUpdateToMainComponent(ui::LatencyInfo* latency_info) {
  27   if (latency_info->FindLatency(
  28           ui::INPUT_EVENT_LATENCY_FORWARD_SCROLL_UPDATE_TO_MAIN_COMPONENT,
  29           0,
  30           nullptr))
  31     return false;
  32   latency_info->AddLatencyNumber(
  33       ui::INPUT_EVENT_LATENCY_FORWARD_SCROLL_UPDATE_TO_MAIN_COMPONENT,
  34       0,
  35       latency_info->trace_id);
  36   return true;
  37 }
  38
  39 }  // namespace
  40
  41 namespace cc {
  42
  43 LatencyInfoSwapPromiseMonitor::LatencyInfoSwapPromiseMonitor(
  44     ui::LatencyInfo* latency,
  45     LayerTreeHost* layer_tree_host,
  46     LayerTreeHostImpl* layer_tree_host_impl)
  47     : SwapPromiseMonitor(layer_tree_host, layer_tree_host_impl),
  48       latency_(latency) {}
  49
  50 LatencyInfoSwapPromiseMonitor::~LatencyInfoSwapPromiseMonitor() {}
  51
  52 void LatencyInfoSwapPromiseMonitor::OnSetNeedsCommitOnMain() {
  53   if (AddRenderingScheduledComponent(latency_, true /* on_main */)) {
  54     scoped_ptr<SwapPromise> swap_promise(new LatencyInfoSwapPromise(*latency_));
  55     layer_tree_host_->QueueSwapPromise(swap_promise.Pass());
  56   }
  57 }
  58
  59 void LatencyInfoSwapPromiseMonitor::OnSetNeedsRedrawOnImpl() {
  60   if (AddRenderingScheduledComponent(latency_, false /* on_main */)) {
  61     scoped_ptr<SwapPromise> swap_promise(new LatencyInfoSwapPromise(*latency_));
  62     layer_tree_host_impl_->active_tree()->QueueSwapPromise(swap_promise.Pass());
  63   }
  64 }
  65
  66 void LatencyInfoSwapPromiseMonitor::OnForwardScrollUpdateToMainThreadOnImpl() {
  67   if (AddForwardingScrollUpdateToMainComponent(latency_)) {
  68     int64 new_sequence_number = 0;
  69     for (ui::LatencyInfo::LatencyMap::const_iterator it =
  70              latency_->latency_components.begin();
  71          it != latency_->latency_components.end();
  72          ++it) {
  73       if (it->first.first == ui::INPUT_EVENT_LATENCY_BEGIN_RWH_COMPONENT) {
  74         new_sequence_number =
  75             (static_cast<int64>(base::PlatformThread::CurrentId()) << 32) |
  76             (it->second.sequence_number & 0xffffffff);
  77         DCHECK(new_sequence_number != it->second.sequence_number);
  78         break;
  79       }
  80     }
  81     if (!new_sequence_number)
  82       return;
  83     ui::LatencyInfo new_latency;
  84     new_latency.AddLatencyNumber(
  85         ui::INPUT_EVENT_LATENCY_BEGIN_SCROLL_UPDATE_MAIN_COMPONENT,
  86         0,
  87         new_sequence_number);
  88     new_latency.TraceEventType("ScrollUpdate");
  89     new_latency.CopyLatencyFrom(
  90         *latency_,
  91         ui::INPUT_EVENT_LATENCY_FORWARD_SCROLL_UPDATE_TO_MAIN_COMPONENT);
  92     scoped_ptr<SwapPromise> swap_promise(
  93         new LatencyInfoSwapPromise(new_latency));
  94     layer_tree_host_impl_->QueueSwapPromiseForMainThreadScrollUpdate(
  95         swap_promise.Pass());
  96   }
  97 }
  98
  99 }  // namespace cc