components/view_manager/display_manager.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 "components/view_manager/display_manager.h"
   6
   7 #include "base/numerics/safe_conversions.h"
   8 #include "components/view_manager/display_manager_factory.h"
   9 #include "components/view_manager/gles2/gpu_state.h"
  10 #include "components/view_manager/native_viewport/onscreen_context_provider.h"
  11 #include "components/view_manager/public/interfaces/gpu.mojom.h"
  12 #include "components/view_manager/public/interfaces/quads.mojom.h"
  13 #include "components/view_manager/public/interfaces/surfaces.mojom.h"
  14 #include "components/view_manager/server_view.h"
  15 #include "components/view_manager/view_coordinate_conversions.h"
  16 #include "mojo/application/public/cpp/application_connection.h"
  17 #include "mojo/application/public/cpp/application_impl.h"
  18 #include "mojo/converters/geometry/geometry_type_converters.h"
  19 #include "mojo/converters/input_events/input_events_type_converters.h"
  20 #include "mojo/converters/input_events/mojo_extended_key_event_data.h"
  21 #include "mojo/converters/surfaces/surfaces_type_converters.h"
  22 #include "mojo/converters/surfaces/surfaces_utils.h"
  23 #include "mojo/converters/transform/transform_type_converters.h"
  24 #include "ui/events/event.h"
  25 #include "ui/events/event_utils.h"
  26 #include "ui/platform_window/platform_window.h"
  27 #include "ui/platform_window/stub/stub_window.h"
  28
  29 #if defined(OS_WIN)
  30 #include "ui/platform_window/win/win_window.h"
  31 #elif defined(USE_X11)
  32 #include "ui/platform_window/x11/x11_window.h"
  33 #elif defined(OS_ANDROID)
  34 #include "ui/platform_window/android/platform_window_android.h"
  35 #endif
  36
  37 using mojo::Rect;
  38 using mojo::Size;
  39
  40 namespace view_manager {
  41 namespace {
  42
  43 void DrawViewTree(mojo::Pass* pass,
  44                   const ServerView* view,
  45                   const gfx::Vector2d& parent_to_root_origin_offset,
  46                   float opacity) {
  47   if (!view->visible())
  48     return;
  49
  50   const gfx::Rect absolute_bounds =
  51       view->bounds() + parent_to_root_origin_offset;
  52   std::vector<const ServerView*> children(view->GetChildren());
  53   const float combined_opacity = opacity * view->opacity();
  54   for (std::vector<const ServerView*>::reverse_iterator it = children.rbegin();
  55        it != children.rend();
  56        ++it) {
  57     DrawViewTree(pass, *it, absolute_bounds.OffsetFromOrigin(),
  58                  combined_opacity);
  59   }
  60
  61   cc::SurfaceId node_id = view->surface_id();
  62
  63   auto surface_quad_state = mojo::SurfaceQuadState::New();
  64   surface_quad_state->surface = mojo::SurfaceId::From(node_id);
  65
  66   gfx::Transform node_transform;
  67   node_transform.Translate(absolute_bounds.x(), absolute_bounds.y());
  68
  69   const gfx::Rect bounds_at_origin(view->bounds().size());
  70   auto surface_quad = mojo::Quad::New();
  71   surface_quad->material = mojo::Material::MATERIAL_SURFACE_CONTENT;
  72   surface_quad->rect = Rect::From(bounds_at_origin);
  73   surface_quad->opaque_rect = Rect::From(bounds_at_origin);
  74   surface_quad->visible_rect = Rect::From(bounds_at_origin);
  75   surface_quad->needs_blending = true;
  76   surface_quad->shared_quad_state_index =
  77       base::saturated_cast<int32_t>(pass->shared_quad_states.size());
  78   surface_quad->surface_quad_state = surface_quad_state.Pass();
  79
  80   auto sqs = mojo::CreateDefaultSQS(view->bounds().size());
  81   sqs->blend_mode = mojo::SK_XFERMODE_kSrcOver_Mode;
  82   sqs->opacity = combined_opacity;
  83   sqs->quad_to_target_transform = mojo::Transform::From(node_transform);
  84
  85   pass->quads.push_back(surface_quad.Pass());
  86   pass->shared_quad_states.push_back(sqs.Pass());
  87 }
  88
  89 float ConvertUIWheelValueToMojoValue(int offset) {
  90   // Mojo's event type takes a value between -1 and 1. Normalize by allowing
  91   // up to 20 of ui's offset. This is a bit arbitrary.
  92   return std::max(
  93       -1.0f, std::min(1.0f, static_cast<float>(offset) /
  94                                 (20 * static_cast<float>(
  95                                           ui::MouseWheelEvent::kWheelDelta))));
  96 }
  97
  98 }  // namespace
  99
 100 // static
 101 DisplayManagerFactory* DisplayManager::factory_ = nullptr;
 102
 103 // static
 104 DisplayManager* DisplayManager::Create(
 105     bool is_headless,
 106     mojo::ApplicationImpl* app_impl,
 107     const scoped_refptr<gles2::GpuState>& gpu_state) {
 108   if (factory_)
 109     return factory_->CreateDisplayManager(is_headless, app_impl, gpu_state);
 110   return new DefaultDisplayManager(is_headless, app_impl, gpu_state);
 111 }
 112
 113 DefaultDisplayManager::DefaultDisplayManager(
 114     bool is_headless,
 115     mojo::ApplicationImpl* app_impl,
 116     const scoped_refptr<gles2::GpuState>& gpu_state)
 117     : is_headless_(is_headless),
 118       app_impl_(app_impl),
 119       gpu_state_(gpu_state),
 120       delegate_(nullptr),
 121       draw_timer_(false, false),
 122       frame_pending_(false),
 123       context_provider_(
 124           new native_viewport::OnscreenContextProvider(gpu_state)),
 125       weak_factory_(this) {
 126   metrics_.size_in_pixels = mojo::Size::New();
 127   metrics_.size_in_pixels->width = 800;
 128   metrics_.size_in_pixels->height = 600;
 129 }
 130
 131 void DefaultDisplayManager::Init(DisplayManagerDelegate* delegate) {
 132   delegate_ = delegate;
 133
 134   gfx::Rect bounds(metrics_.size_in_pixels.To<gfx::Size>());
 135   if (is_headless_) {
 136     platform_window_.reset(new ui::StubWindow(this));
 137   } else {
 138 #if defined(OS_WIN)
 139     platform_window_.reset(new ui::WinWindow(this, bounds));
 140 #elif defined(USE_X11)
 141     platform_window_.reset(new ui::X11Window(this));
 142 #elif defined(OS_ANDROID)
 143     platform_window_.reset(new ui::PlatformWindowAndroid(this));
 144 #else
 145     NOTREACHED() << "Unsupported platform";
 146 #endif
 147   }
 148   platform_window_->SetBounds(bounds);
 149   platform_window_->Show();
 150
 151   mojo::ContextProviderPtr context_provider;
 152   context_provider_->Bind(GetProxy(&context_provider).Pass());
 153   mojo::DisplayFactoryPtr display_factory;
 154   mojo::URLRequestPtr request(mojo::URLRequest::New());
 155   request->url = mojo::String::From("mojo:surfaces_service");
 156   app_impl_->ConnectToService(request.Pass(), &display_factory);
 157   // TODO(fsamuel): We should indicate to the delegate that this object failed
 158   // to initialize.
 159   if (!display_factory)
 160     return;
 161   display_factory->Create(context_provider.Pass(),
 162                           nullptr,  // returner - we never submit resources.
 163                           GetProxy(&display_));
 164 }
 165
 166 DefaultDisplayManager::~DefaultDisplayManager() {
 167   // Destroy before |platform_window_| because this will destroy
 168   // CommandBufferDriver objects that contain child windows. Otherwise if this
 169   // class destroys its window first, X errors will occur.
 170   context_provider_.reset();
 171
 172   // Destroy the PlatformWindow early on as it may call us back during
 173   // destruction and we want to be in a known state.
 174   platform_window_.reset();
 175 }
 176
 177 void DefaultDisplayManager::SchedulePaint(const ServerView* view,
 178                                           const gfx::Rect& bounds) {
 179   DCHECK(view);
 180   if (!view->IsDrawn())
 181     return;
 182   const gfx::Rect root_relative_rect =
 183       ConvertRectBetweenViews(view, delegate_->GetRootView(), bounds);
 184   if (root_relative_rect.IsEmpty())
 185     return;
 186   dirty_rect_.Union(root_relative_rect);
 187   WantToDraw();
 188 }
 189
 190 void DefaultDisplayManager::SetViewportSize(const gfx::Size& size) {
 191   platform_window_->SetBounds(gfx::Rect(size));
 192 }
 193
 194 const mojo::ViewportMetrics& DefaultDisplayManager::GetViewportMetrics() {
 195   return metrics_;
 196 }
 197
 198 void DefaultDisplayManager::Draw() {
 199   gfx::Rect rect(metrics_.size_in_pixels.To<gfx::Size>());
 200   auto pass = mojo::CreateDefaultPass(1, rect);
 201   pass->damage_rect = Rect::From(dirty_rect_);
 202
 203   DrawViewTree(pass.get(), delegate_->GetRootView(), gfx::Vector2d(), 1.0f);
 204
 205   auto frame = mojo::Frame::New();
 206   frame->passes.push_back(pass.Pass());
 207   frame->resources.resize(0u);
 208   frame_pending_ = true;
 209   if (display_) {
 210     display_->SubmitFrame(
 211         frame.Pass(),
 212         base::Bind(&DefaultDisplayManager::DidDraw, base::Unretained(this)));
 213   }
 214   dirty_rect_ = gfx::Rect();
 215 }
 216
 217 void DefaultDisplayManager::DidDraw() {
 218   frame_pending_ = false;
 219   if (!dirty_rect_.IsEmpty())
 220     WantToDraw();
 221 }
 222
 223 void DefaultDisplayManager::WantToDraw() {
 224   if (draw_timer_.IsRunning() || frame_pending_)
 225     return;
 226
 227   draw_timer_.Start(
 228       FROM_HERE, base::TimeDelta(),
 229       base::Bind(&DefaultDisplayManager::Draw, base::Unretained(this)));
 230 }
 231
 232 void DefaultDisplayManager::UpdateMetrics(const gfx::Size& size,
 233                                           float device_pixel_ratio) {
 234   if (metrics_.size_in_pixels.To<gfx::Size>() == size &&
 235       metrics_.device_pixel_ratio == device_pixel_ratio)
 236     return;
 237   mojo::ViewportMetrics old_metrics;
 238   old_metrics.size_in_pixels = metrics_.size_in_pixels.Clone();
 239   old_metrics.device_pixel_ratio = metrics_.device_pixel_ratio;
 240
 241   metrics_.size_in_pixels = mojo::Size::From(size);
 242   metrics_.device_pixel_ratio = device_pixel_ratio;
 243
 244   delegate_->OnViewportMetricsChanged(old_metrics, metrics_);
 245 }
 246
 247 void DefaultDisplayManager::OnBoundsChanged(const gfx::Rect& new_bounds) {
 248   UpdateMetrics(new_bounds.size(), metrics_.device_pixel_ratio);
 249 }
 250
 251 void DefaultDisplayManager::OnDamageRect(const gfx::Rect& damaged_region) {
 252 }
 253
 254 void DefaultDisplayManager::DispatchEvent(ui::Event* event) {
 255   mojo::EventPtr mojo_event(mojo::Event::From(*event));
 256   if (event->IsMouseWheelEvent()) {
 257     // Mojo's event type has a different meaning for wheel events. Convert
 258     // between the two.
 259     ui::MouseWheelEvent* wheel_event =
 260         static_cast<ui::MouseWheelEvent*>(event);
 261     DCHECK(mojo_event->pointer_data);
 262     mojo_event->pointer_data->horizontal_wheel =
 263         ConvertUIWheelValueToMojoValue(wheel_event->x_offset());
 264     mojo_event->pointer_data->horizontal_wheel =
 265         ConvertUIWheelValueToMojoValue(wheel_event->y_offset());
 266   }
 267   delegate_->OnEvent(mojo_event.Pass());
 268
 269   switch (event->type()) {
 270     case ui::ET_MOUSE_PRESSED:
 271     case ui::ET_TOUCH_PRESSED:
 272       platform_window_->SetCapture();
 273       break;
 274     case ui::ET_MOUSE_RELEASED:
 275     case ui::ET_TOUCH_RELEASED:
 276       platform_window_->ReleaseCapture();
 277       break;
 278     default:
 279       break;
 280   }
 281 }
 282
 283 void DefaultDisplayManager::OnCloseRequest() {
 284   platform_window_->Close();
 285 }
 286
 287 void DefaultDisplayManager::OnClosed() {
 288   delegate_->OnDisplayClosed();
 289 }
 290
 291 void DefaultDisplayManager::OnWindowStateChanged(
 292     ui::PlatformWindowState new_state) {
 293 }
 294
 295 void DefaultDisplayManager::OnLostCapture() {
 296 }
 297
 298 void DefaultDisplayManager::OnAcceleratedWidgetAvailable(
 299     gfx::AcceleratedWidget widget,
 300     float device_pixel_ratio) {
 301   context_provider_->SetAcceleratedWidget(widget);
 302   UpdateMetrics(metrics_.size_in_pixels.To<gfx::Size>(), device_pixel_ratio);
 303 }
 304
 305 void DefaultDisplayManager::OnActivationChanged(bool active) {
 306 }
 307
 308 }  // namespace view_manager