cc/trees/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/trees/latency_info_swap_promise_monitor.h"
   6
   7 #include "base/threading/platform_thread.h"
   8 #include "cc/output/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 =
  18       on_main ? 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, 0,
  29           nullptr))
  30     return false;
  31   latency_info->AddLatencyNumber(
  32       ui::INPUT_EVENT_LATENCY_FORWARD_SCROLL_UPDATE_TO_MAIN_COMPONENT, 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
  49 LatencyInfoSwapPromiseMonitor::~LatencyInfoSwapPromiseMonitor() {
  50 }
  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     // Queue a pinned swap promise on the active tree. This will allow
  63     // measurement of the time to the next SwapBuffers(). The swap
  64     // promise is pinned so that it is not interrupted by new incoming
  65     // activations (which would otherwise break the swap promise).
  66     layer_tree_host_impl_->active_tree()->QueuePinnedSwapPromise(
  67         swap_promise.Pass());
  68   }
  69 }
  70
  71 void LatencyInfoSwapPromiseMonitor::OnForwardScrollUpdateToMainThreadOnImpl() {
  72   if (AddForwardingScrollUpdateToMainComponent(latency_)) {
  73     int64 new_sequence_number = 0;
  74     for (ui::LatencyInfo::LatencyMap::const_iterator it =
  75              latency_->latency_components().begin();
  76          it != latency_->latency_components().end(); ++it) {
  77       if (it->first.first == ui::INPUT_EVENT_LATENCY_BEGIN_RWH_COMPONENT) {
  78         new_sequence_number =
  79             ((static_cast<int64>(base::PlatformThread::CurrentId()) << 32) ^
  80              (reinterpret_cast<uint64>(this) << 32)) |
  81             (it->second.sequence_number & 0xffffffff);
  82         if (new_sequence_number == it->second.sequence_number)
  83           return;
  84         break;
  85       }
  86     }
  87     if (!new_sequence_number)
  88       return;
  89     ui::LatencyInfo new_latency;
  90     new_latency.AddLatencyNumberWithTraceName(
  91         ui::LATENCY_BEGIN_SCROLL_LISTENER_UPDATE_MAIN_COMPONENT, 0,
  92         new_sequence_number, "ScrollUpdate");
  93     new_latency.CopyLatencyFrom(
  94         *latency_,
  95         ui::INPUT_EVENT_LATENCY_FORWARD_SCROLL_UPDATE_TO_MAIN_COMPONENT);
  96     scoped_ptr<SwapPromise> swap_promise(
  97         new LatencyInfoSwapPromise(new_latency));
  98     layer_tree_host_impl_->QueueSwapPromiseForMainThreadScrollUpdate(
  99         swap_promise.Pass());
 100   }
 101 }
 102
 103 }  // namespace cc