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