| // Copyright 2014 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "ash/touch/touch_transformer_controller.h" |
| |
| #include "ash/display/display_controller.h" |
| #include "ash/display/display_manager.h" |
| #include "ash/host/ash_window_tree_host.h" |
| #include "ash/root_window_controller.h" |
| #include "ash/shell.h" |
| #include "ui/aura/window_tree_host.h" |
| #include "ui/display/chromeos/display_configurator.h" |
| #include "ui/display/types/display_snapshot.h" |
| #include "ui/events/devices/device_data_manager.h" |
| |
| namespace ash { |
| |
| namespace { |
| |
| DisplayManager* GetDisplayManager() { |
| return Shell::GetInstance()->display_manager(); |
| } |
| |
| ui::TouchscreenDevice FindTouchscreenById(unsigned int id) { |
| const std::vector<ui::TouchscreenDevice>& touchscreens = |
| ui::DeviceDataManager::GetInstance()->touchscreen_devices(); |
| for (auto touchscreen : touchscreens) { |
| if (touchscreen.id == id) |
| return touchscreen; |
| } |
| |
| return ui::TouchscreenDevice(); |
| } |
| |
| } // namespace |
| |
| // This is to compute the scale ratio for the TouchEvent's radius. The |
| // configured resolution of the display is not always the same as the touch |
| // screen's reporting resolution, e.g. the display could be set as |
| // 1920x1080 while the touchscreen is reporting touch position range at |
| // 32767x32767. Touch radius is reported in the units the same as touch position |
| // so we need to scale the touch radius to be compatible with the display's |
| // resolution. We compute the scale as |
| // sqrt of (display_area / touchscreen_area) |
| double TouchTransformerController::GetTouchResolutionScale( |
| const DisplayInfo& touch_display, |
| const ui::TouchscreenDevice& touch_device) const { |
| if (touch_device.id == ui::InputDevice::kInvalidId || |
| touch_device.size.IsEmpty() || |
| touch_display.bounds_in_native().size().IsEmpty()) |
| return 1.0; |
| |
| double display_area = touch_display.bounds_in_native().size().GetArea(); |
| double touch_area = touch_device.size.GetArea(); |
| double ratio = std::sqrt(display_area / touch_area); |
| |
| VLOG(2) << "Display size: " |
| << touch_display.bounds_in_native().size().ToString() |
| << ", Touchscreen size: " << touch_device.size.ToString() |
| << ", Touch radius scale ratio: " << ratio; |
| return ratio; |
| } |
| |
| gfx::Transform TouchTransformerController::GetTouchTransform( |
| const DisplayInfo& display, |
| const ui::TouchscreenDevice& touchscreen, |
| const gfx::Size& framebuffer_size) const { |
| gfx::SizeF current_size = display.bounds_in_native().size(); |
| gfx::SizeF native_size = display.GetNativeModeSize(); |
| #if defined(USE_OZONE) |
| gfx::SizeF touch_area = touchscreen.size; |
| #elif defined(USE_X11) |
| // On X11 touches are reported in the framebuffer coordinate space. |
| gfx::SizeF touch_area = framebuffer_size; |
| #endif |
| |
| gfx::Transform ctm; |
| |
| if (current_size.IsEmpty() || native_size.IsEmpty() || touch_area.IsEmpty() || |
| touchscreen.id == ui::InputDevice::kInvalidId) |
| return ctm; |
| |
| // Take care of panel fitting only if supported. |
| // If panel fitting is enabled then the aspect ratio is preserved and the |
| // display is scaled acordingly. In this case blank regions would be present |
| // in order to center the displayed area. |
| if (display.is_aspect_preserving_scaling()) { |
| float native_ar = native_size.width() / native_size.height(); |
| float current_ar = current_size.width() / current_size.height(); |
| |
| if (current_ar > native_ar) { // Letterboxing |
| ctm.Translate( |
| 0, (1 - current_ar / native_ar) * 0.5 * current_size.height()); |
| ctm.Scale(1, current_ar / native_ar); |
| } else if (native_ar > current_ar) { // Pillarboxing |
| ctm.Translate( |
| (1 - native_ar / current_ar) * 0.5 * current_size.width(), 0); |
| ctm.Scale(native_ar / current_ar, 1); |
| } |
| } |
| |
| // Take care of scaling between touchscreen area and display resolution. |
| ctm.Scale(current_size.width() / touch_area.width(), |
| current_size.height() / touch_area.height()); |
| return ctm; |
| } |
| |
| TouchTransformerController::TouchTransformerController() { |
| Shell::GetInstance()->display_controller()->AddObserver(this); |
| } |
| |
| TouchTransformerController::~TouchTransformerController() { |
| Shell::GetInstance()->display_controller()->RemoveObserver(this); |
| } |
| |
| void TouchTransformerController::UpdateTouchTransformer() const { |
| ui::DeviceDataManager* device_manager = ui::DeviceDataManager::GetInstance(); |
| device_manager->ClearTouchTransformerRecord(); |
| |
| // Display IDs and DisplayInfo for mirror or extended mode. |
| int64 display1_id = gfx::Display::kInvalidDisplayID; |
| int64 display2_id = gfx::Display::kInvalidDisplayID; |
| DisplayInfo display1; |
| DisplayInfo display2; |
| // Display ID and DisplayInfo for single display mode. |
| int64 single_display_id = gfx::Display::kInvalidDisplayID; |
| DisplayInfo single_display; |
| |
| DisplayController* display_controller = |
| Shell::GetInstance()->display_controller(); |
| ui::MultipleDisplayState display_state = |
| Shell::GetInstance()->display_configurator()->display_state(); |
| if (display_state == ui::MULTIPLE_DISPLAY_STATE_INVALID || |
| display_state == ui::MULTIPLE_DISPLAY_STATE_HEADLESS) { |
| return; |
| } else if (display_state == ui::MULTIPLE_DISPLAY_STATE_DUAL_MIRROR || |
| display_state == ui::MULTIPLE_DISPLAY_STATE_DUAL_EXTENDED) { |
| DisplayIdPair id_pair = GetDisplayManager()->GetCurrentDisplayIdPair(); |
| display1_id = id_pair.first; |
| display2_id = id_pair.second; |
| DCHECK(display1_id != gfx::Display::kInvalidDisplayID && |
| display2_id != gfx::Display::kInvalidDisplayID); |
| display1 = GetDisplayManager()->GetDisplayInfo(display1_id); |
| display2 = GetDisplayManager()->GetDisplayInfo(display2_id); |
| device_manager->UpdateTouchRadiusScale( |
| display1.touch_device_id(), |
| GetTouchResolutionScale( |
| display1, |
| FindTouchscreenById(display1.touch_device_id()))); |
| device_manager->UpdateTouchRadiusScale( |
| display2.touch_device_id(), |
| GetTouchResolutionScale( |
| display2, |
| FindTouchscreenById(display2.touch_device_id()))); |
| } else { |
| single_display_id = GetDisplayManager()->first_display_id(); |
| DCHECK(single_display_id != gfx::Display::kInvalidDisplayID); |
| single_display = GetDisplayManager()->GetDisplayInfo(single_display_id); |
| device_manager->UpdateTouchRadiusScale( |
| single_display.touch_device_id(), |
| GetTouchResolutionScale( |
| single_display, |
| FindTouchscreenById(single_display.touch_device_id()))); |
| } |
| |
| gfx::Size fb_size = |
| Shell::GetInstance()->display_configurator()->framebuffer_size(); |
| |
| if (display_state == ui::MULTIPLE_DISPLAY_STATE_DUAL_MIRROR) { |
| // In mirror mode, both displays share the same root window so |
| // both display ids are associated with the root window. |
| aura::Window* root = display_controller->GetPrimaryRootWindow(); |
| RootWindowController::ForWindow(root)->ash_host()->UpdateDisplayID( |
| display1_id, display2_id); |
| device_manager->UpdateTouchInfoForDisplay( |
| display1_id, |
| display1.touch_device_id(), |
| GetTouchTransform(display1, |
| FindTouchscreenById(display1.touch_device_id()), |
| fb_size)); |
| device_manager->UpdateTouchInfoForDisplay( |
| display2_id, |
| display2.touch_device_id(), |
| GetTouchTransform(display2, |
| FindTouchscreenById(display2.touch_device_id()), |
| fb_size)); |
| return; |
| } |
| |
| if (display_state == ui::MULTIPLE_DISPLAY_STATE_DUAL_EXTENDED) { |
| // In extended but software mirroring mode, ther is only one X root window |
| // that associates with both displays. |
| if (GetDisplayManager()->software_mirroring_enabled()) { |
| aura::Window* root = display_controller->GetPrimaryRootWindow(); |
| RootWindowController::ForWindow(root)->ash_host()->UpdateDisplayID( |
| display1_id, display2_id); |
| DisplayInfo source_display = |
| gfx::Display::InternalDisplayId() == display1_id ? |
| display1 : display2; |
| // Mapping from framebuffer size to the source display's native |
| // resolution. |
| device_manager->UpdateTouchInfoForDisplay( |
| display1_id, |
| display1.touch_device_id(), |
| GetTouchTransform(source_display, |
| FindTouchscreenById(display1.touch_device_id()), |
| fb_size)); |
| device_manager->UpdateTouchInfoForDisplay( |
| display2_id, |
| display2.touch_device_id(), |
| GetTouchTransform(source_display, |
| FindTouchscreenById(display2.touch_device_id()), |
| fb_size)); |
| } else { |
| // In actual extended mode, each display is associated with one root |
| // window. |
| aura::Window* root1 = |
| display_controller->GetRootWindowForDisplayId(display1_id); |
| aura::Window* root2 = |
| display_controller->GetRootWindowForDisplayId(display2_id); |
| RootWindowController::ForWindow(root1)->ash_host()->UpdateDisplayID( |
| display1_id, gfx::Display::kInvalidDisplayID); |
| RootWindowController::ForWindow(root2)->ash_host()->UpdateDisplayID( |
| display2_id, gfx::Display::kInvalidDisplayID); |
| // Mapping from framebuffer size to each display's native resolution. |
| device_manager->UpdateTouchInfoForDisplay( |
| display1_id, |
| display1.touch_device_id(), |
| GetTouchTransform(display1, |
| FindTouchscreenById(display1.touch_device_id()), |
| fb_size)); |
| device_manager->UpdateTouchInfoForDisplay( |
| display2_id, |
| display2.touch_device_id(), |
| GetTouchTransform(display2, |
| FindTouchscreenById(display2.touch_device_id()), |
| fb_size)); |
| } |
| return; |
| } |
| |
| // Single display mode. The root window has one associated display id. |
| aura::Window* root = |
| display_controller->GetRootWindowForDisplayId(single_display.id()); |
| RootWindowController::ForWindow(root)->ash_host()->UpdateDisplayID( |
| single_display.id(), gfx::Display::kInvalidDisplayID); |
| device_manager->UpdateTouchInfoForDisplay( |
| single_display_id, |
| single_display.touch_device_id(), |
| GetTouchTransform(single_display, |
| FindTouchscreenById(single_display.touch_device_id()), |
| fb_size)); |
| } |
| |
| void TouchTransformerController::OnDisplaysInitialized() { |
| UpdateTouchTransformer(); |
| } |
| |
| void TouchTransformerController::OnDisplayConfigurationChanged() { |
| UpdateTouchTransformer(); |
| } |
| |
| } // namespace ash |
