ui/display/chromeos/update_display_configuration_task.cc

   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 #include "ui/display/chromeos/update_display_configuration_task.h"
   6
   7 #include "ui/display/chromeos/configure_displays_task.h"
   8 #include "ui/display/chromeos/display_util.h"
   9 #include "ui/display/types/display_snapshot.h"
  10 #include "ui/display/types/native_display_delegate.h"
  11
  12 namespace ui {
  13
  14 UpdateDisplayConfigurationTask::UpdateDisplayConfigurationTask(
  15     NativeDisplayDelegate* delegate,
  16     DisplayConfigurator::DisplayLayoutManager* layout_manager,
  17     MultipleDisplayState new_display_state,
  18     chromeos::DisplayPowerState new_power_state,
  19     int power_flags,
  20     uint32_t background_color_argb,
  21     bool force_configure,
  22     const ResponseCallback& callback)
  23     : delegate_(delegate),
  24       layout_manager_(layout_manager),
  25       new_display_state_(new_display_state),
  26       new_power_state_(new_power_state),
  27       power_flags_(power_flags),
  28       background_color_argb_(background_color_argb),
  29       force_configure_(force_configure),
  30       callback_(callback),
  31       force_dpms_(false),
  32       weak_ptr_factory_(this) {
  33   delegate_->GrabServer();
  34 }
  35
  36 UpdateDisplayConfigurationTask::~UpdateDisplayConfigurationTask() {
  37   delegate_->UngrabServer();
  38 }
  39
  40 void UpdateDisplayConfigurationTask::Run() {
  41   delegate_->GetDisplays(
  42       base::Bind(&UpdateDisplayConfigurationTask::OnDisplaysUpdated,
  43                  weak_ptr_factory_.GetWeakPtr()));
  44 }
  45
  46 void UpdateDisplayConfigurationTask::OnDisplaysUpdated(
  47     const std::vector<DisplaySnapshot*>& displays) {
  48   cached_displays_ = displays;
  49
  50   if (cached_displays_.size() > 1 && background_color_argb_)
  51     delegate_->SetBackgroundColor(background_color_argb_);
  52
  53   // If the user hasn't requested a display state, update it using the requested
  54   // power state.
  55   if (new_display_state_ == MULTIPLE_DISPLAY_STATE_INVALID)
  56     new_display_state_ = ChooseDisplayState();
  57
  58   VLOG(1) << "OnDisplaysUpdated: new_display_state="
  59           << MultipleDisplayStateToString(new_display_state_)
  60           << " new_power_state=" << DisplayPowerStateToString(new_power_state_)
  61           << " flags=" << power_flags_
  62           << " force_configure=" << force_configure_
  63           << " display_count=" << cached_displays_.size();
  64   // If there has been any change in the requested power state and the displays
  65   // aren't being turned off force a change in DPMS state.
  66   force_dpms_ = ShouldForceDpms() && ShouldConfigure();
  67
  68   if (ShouldConfigure()) {
  69     EnterState(base::Bind(&UpdateDisplayConfigurationTask::OnStateEntered,
  70                           weak_ptr_factory_.GetWeakPtr()));
  71   } else {
  72     // If we don't have to configure then we're sticking with the old
  73     // configuration. Update it such that it reflects in the reported value.
  74     new_power_state_ = layout_manager_->GetPowerState();
  75     FinishConfiguration(true);
  76   }
  77 }
  78
  79 void UpdateDisplayConfigurationTask::EnterState(
  80     const ConfigureDisplaysTask::ResponseCallback& callback) {
  81   VLOG(2) << "EnterState";
  82   std::vector<DisplayConfigureRequest> requests;
  83   if (!layout_manager_->GetDisplayLayout(cached_displays_, new_display_state_,
  84                                          new_power_state_, &requests,
  85                                          &framebuffer_size_)) {
  86     callback.Run(ConfigureDisplaysTask::ERROR);
  87     return;
  88   }
  89   if (!requests.empty()) {
  90     DCHECK(!framebuffer_size_.IsEmpty());
  91     delegate_->CreateFrameBuffer(framebuffer_size_);
  92     configure_task_.reset(
  93         new ConfigureDisplaysTask(delegate_, requests, callback));
  94     configure_task_->Run();
  95   } else {
  96     VLOG(2) << "No displays";
  97     callback.Run(ConfigureDisplaysTask::SUCCESS);
  98   }
  99 }
 100
 101 void UpdateDisplayConfigurationTask::OnStateEntered(
 102     ConfigureDisplaysTask::Status status) {
 103   bool success = status != ConfigureDisplaysTask::ERROR;
 104   if (new_display_state_ == MULTIPLE_DISPLAY_STATE_DUAL_MIRROR &&
 105       status == ConfigureDisplaysTask::PARTIAL_SUCCESS)
 106     success = false;
 107
 108   if (layout_manager_->GetSoftwareMirroringController()) {
 109     bool enable_software_mirroring = false;
 110     if (!success && new_display_state_ == MULTIPLE_DISPLAY_STATE_DUAL_MIRROR) {
 111       if (layout_manager_->GetDisplayState() !=
 112               MULTIPLE_DISPLAY_STATE_DUAL_EXTENDED ||
 113           layout_manager_->GetPowerState() != new_power_state_) {
 114         new_display_state_ = MULTIPLE_DISPLAY_STATE_DUAL_EXTENDED;
 115         EnterState(base::Bind(
 116             &UpdateDisplayConfigurationTask::OnEnableSoftwareMirroring,
 117             weak_ptr_factory_.GetWeakPtr()));
 118         return;
 119       }
 120
 121       success = layout_manager_->GetDisplayState() ==
 122                 MULTIPLE_DISPLAY_STATE_DUAL_EXTENDED;
 123       enable_software_mirroring = success;
 124       if (success)
 125         new_display_state_ = MULTIPLE_DISPLAY_STATE_DUAL_EXTENDED;
 126     }
 127
 128     layout_manager_->GetSoftwareMirroringController()->SetSoftwareMirroring(
 129         enable_software_mirroring);
 130   }
 131
 132   FinishConfiguration(success);
 133 }
 134
 135 void UpdateDisplayConfigurationTask::OnEnableSoftwareMirroring(
 136     ConfigureDisplaysTask::Status status) {
 137   bool success = status != ConfigureDisplaysTask::ERROR;
 138   layout_manager_->GetSoftwareMirroringController()->SetSoftwareMirroring(
 139       success);
 140   FinishConfiguration(success);
 141 }
 142
 143 void UpdateDisplayConfigurationTask::FinishConfiguration(bool success) {
 144   if (success && force_dpms_)
 145     delegate_->ForceDPMSOn();
 146
 147   callback_.Run(success, cached_displays_, framebuffer_size_,
 148                 new_display_state_, new_power_state_);
 149 }
 150
 151 bool UpdateDisplayConfigurationTask::ShouldForceDpms() const {
 152   return new_power_state_ != chromeos::DISPLAY_POWER_ALL_OFF &&
 153          (layout_manager_->GetPowerState() != new_power_state_ ||
 154           (power_flags_ & DisplayConfigurator::kSetDisplayPowerForceProbe));
 155 }
 156
 157 bool UpdateDisplayConfigurationTask::ShouldConfigure() const {
 158   if (force_configure_)
 159     return true;
 160
 161   if (cached_displays_.size() == 1 &&
 162       cached_displays_[0]->type() == DISPLAY_CONNECTION_TYPE_INTERNAL)
 163     return true;
 164
 165   if (!(power_flags_ &
 166         DisplayConfigurator::kSetDisplayPowerOnlyIfSingleInternalDisplay))
 167     return true;
 168
 169   if (new_display_state_ != layout_manager_->GetDisplayState())
 170     return true;
 171
 172   return false;
 173 }
 174
 175 MultipleDisplayState UpdateDisplayConfigurationTask::ChooseDisplayState()
 176     const {
 177   int num_on_displays =
 178       GetDisplayPower(cached_displays_, new_power_state_, NULL);
 179   switch (cached_displays_.size()) {
 180     case 0:
 181       return MULTIPLE_DISPLAY_STATE_HEADLESS;
 182     case 1:
 183       return MULTIPLE_DISPLAY_STATE_SINGLE;
 184     default: {
 185       if (num_on_displays == 1) {
 186         // If only one display is currently turned on, return the "single"
 187         // state so that its native mode will be used.
 188         return MULTIPLE_DISPLAY_STATE_SINGLE;
 189       }
 190       if (num_on_displays >= 3) {
 191         return MULTIPLE_DISPLAY_STATE_MULTI_EXTENDED;
 192       } else if (cached_displays_.size() == 2) {
 193         if (!layout_manager_->GetStateController())
 194           return MULTIPLE_DISPLAY_STATE_DUAL_EXTENDED;
 195         // With either both displays on or both displays off, use one of the
 196         // dual modes.
 197         std::vector<int64_t> display_ids;
 198         for (size_t i = 0; i < cached_displays_.size(); ++i)
 199           display_ids.push_back(cached_displays_[i]->display_id());
 200
 201         return layout_manager_->GetStateController()->GetStateForDisplayIds(
 202             display_ids);
 203       }
 204       NOTREACHED();
 205     }
 206   }
 207   return MULTIPLE_DISPLAY_STATE_INVALID;
 208 }
 209
 210 }  // namespace ui