ui/compositor/compositor.cc

   1 // Copyright (c) 2012 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/compositor/compositor.h"
   6
   7 #include <algorithm>
   8 #include <deque>
   9
  10 #include "base/bind.h"
  11 #include "base/command_line.h"
  12 #include "base/debug/trace_event.h"
  13 #include "base/message_loop/message_loop.h"
  14 #include "base/metrics/histogram.h"
  15 #include "base/strings/string_util.h"
  16 #include "base/sys_info.h"
  17 #include "cc/base/latency_info_swap_promise.h"
  18 #include "cc/base/switches.h"
  19 #include "cc/input/input_handler.h"
  20 #include "cc/layers/layer.h"
  21 #include "cc/output/context_provider.h"
  22 #include "cc/trees/layer_tree_host.h"
  23 #include "third_party/skia/include/core/SkBitmap.h"
  24 #include "ui/compositor/compositor_observer.h"
  25 #include "ui/compositor/compositor_switches.h"
  26 #include "ui/compositor/compositor_vsync_manager.h"
  27 #include "ui/compositor/dip_util.h"
  28 #include "ui/compositor/layer.h"
  29 #include "ui/compositor/layer_animator_collection.h"
  30 #include "ui/gfx/frame_time.h"
  31 #include "ui/gl/gl_context.h"
  32 #include "ui/gl/gl_switches.h"
  33
  34 namespace {
  35
  36 const double kDefaultRefreshRate = 60.0;
  37 const double kTestRefreshRate = 200.0;
  38
  39 const int kCompositorLockTimeoutMs = 67;
  40
  41 }  // namespace
  42
  43 namespace ui {
  44
  45 CompositorLock::CompositorLock(Compositor* compositor)
  46     : compositor_(compositor) {
  47   compositor_->task_runner_->PostDelayedTask(
  48       FROM_HERE,
  49       base::Bind(&CompositorLock::CancelLock, AsWeakPtr()),
  50       base::TimeDelta::FromMilliseconds(kCompositorLockTimeoutMs));
  51 }
  52
  53 CompositorLock::~CompositorLock() {
  54   CancelLock();
  55 }
  56
  57 void CompositorLock::CancelLock() {
  58   if (!compositor_)
  59     return;
  60   compositor_->UnlockCompositor();
  61   compositor_ = NULL;
  62 }
  63
  64 }  // namespace ui
  65
  66 namespace {
  67
  68 }  // namespace
  69
  70 namespace ui {
  71
  72 Compositor::Compositor(gfx::AcceleratedWidget widget,
  73                        ui::ContextFactory* context_factory,
  74                        scoped_refptr<base::SingleThreadTaskRunner> task_runner)
  75     : context_factory_(context_factory),
  76       root_layer_(NULL),
  77       widget_(widget),
  78       compositor_thread_loop_(context_factory->GetCompositorMessageLoop()),
  79       task_runner_(task_runner),
  80       vsync_manager_(new CompositorVSyncManager()),
  81       device_scale_factor_(0.0f),
  82       last_started_frame_(0),
  83       last_ended_frame_(0),
  84       disable_schedule_composite_(false),
  85       compositor_lock_(NULL),
  86       defer_draw_scheduling_(false),
  87       waiting_on_compositing_end_(false),
  88       draw_on_compositing_end_(false),
  89       swap_state_(SWAP_NONE),
  90       layer_animator_collection_(this),
  91       schedule_draw_factory_(this) {
  92   root_web_layer_ = cc::Layer::Create();
  93
  94   CommandLine* command_line = CommandLine::ForCurrentProcess();
  95
  96   cc::LayerTreeSettings settings;
  97   settings.refresh_rate =
  98       context_factory_->DoesCreateTestContexts()
  99       ? kTestRefreshRate
 100       : kDefaultRefreshRate;
 101   settings.main_frame_before_draw_enabled = false;
 102   settings.main_frame_before_activation_enabled = false;
 103   settings.throttle_frame_production =
 104       !command_line->HasSwitch(switches::kDisableGpuVsync);
 105 #if !defined(OS_MACOSX)
 106   settings.partial_swap_enabled =
 107       !command_line->HasSwitch(cc::switches::kUIDisablePartialSwap);
 108 #endif
 109 #if defined(OS_CHROMEOS)
 110   settings.per_tile_painting_enabled = true;
 111 #endif
 112
 113   // These flags should be mirrored by renderer versions in content/renderer/.
 114   settings.initial_debug_state.show_debug_borders =
 115       command_line->HasSwitch(cc::switches::kUIShowCompositedLayerBorders);
 116   settings.initial_debug_state.show_fps_counter =
 117       command_line->HasSwitch(cc::switches::kUIShowFPSCounter);
 118   settings.initial_debug_state.show_layer_animation_bounds_rects =
 119       command_line->HasSwitch(cc::switches::kUIShowLayerAnimationBounds);
 120   settings.initial_debug_state.show_paint_rects =
 121       command_line->HasSwitch(switches::kUIShowPaintRects);
 122   settings.initial_debug_state.show_property_changed_rects =
 123       command_line->HasSwitch(cc::switches::kUIShowPropertyChangedRects);
 124   settings.initial_debug_state.show_surface_damage_rects =
 125       command_line->HasSwitch(cc::switches::kUIShowSurfaceDamageRects);
 126   settings.initial_debug_state.show_screen_space_rects =
 127       command_line->HasSwitch(cc::switches::kUIShowScreenSpaceRects);
 128   settings.initial_debug_state.show_replica_screen_space_rects =
 129       command_line->HasSwitch(cc::switches::kUIShowReplicaScreenSpaceRects);
 130   settings.initial_debug_state.show_occluding_rects =
 131       command_line->HasSwitch(cc::switches::kUIShowOccludingRects);
 132   settings.initial_debug_state.show_non_occluding_rects =
 133       command_line->HasSwitch(cc::switches::kUIShowNonOccludingRects);
 134
 135   settings.initial_debug_state.SetRecordRenderingStats(
 136       command_line->HasSwitch(cc::switches::kEnableGpuBenchmarking));
 137
 138   settings.impl_side_painting = IsUIImplSidePaintingEnabled();
 139   settings.use_zero_copy = IsUIZeroCopyEnabled();
 140
 141   base::TimeTicks before_create = base::TimeTicks::Now();
 142   if (compositor_thread_loop_) {
 143     host_ = cc::LayerTreeHost::CreateThreaded(
 144         this,
 145         context_factory_->GetSharedBitmapManager(),
 146         settings,
 147         task_runner_,
 148         compositor_thread_loop_);
 149   } else {
 150     host_ = cc::LayerTreeHost::CreateSingleThreaded(
 151         this,
 152         this,
 153         context_factory_->GetSharedBitmapManager(),
 154         settings,
 155         task_runner_);
 156   }
 157   UMA_HISTOGRAM_TIMES("GPU.CreateBrowserCompositor",
 158                       base::TimeTicks::Now() - before_create);
 159   host_->SetRootLayer(root_web_layer_);
 160   host_->SetLayerTreeHostClientReady();
 161 }
 162
 163 Compositor::~Compositor() {
 164   TRACE_EVENT0("shutdown", "Compositor::destructor");
 165
 166   CancelCompositorLock();
 167   DCHECK(!compositor_lock_);
 168
 169   if (root_layer_)
 170     root_layer_->SetCompositor(NULL);
 171
 172   // Stop all outstanding draws before telling the ContextFactory to tear
 173   // down any contexts that the |host_| may rely upon.
 174   host_.reset();
 175
 176   context_factory_->RemoveCompositor(this);
 177 }
 178
 179 void Compositor::ScheduleDraw() {
 180   if (compositor_thread_loop_) {
 181     host_->SetNeedsCommit();
 182   } else if (!defer_draw_scheduling_) {
 183     defer_draw_scheduling_ = true;
 184     task_runner_->PostTask(
 185         FROM_HERE,
 186         base::Bind(&Compositor::Draw, schedule_draw_factory_.GetWeakPtr()));
 187   }
 188 }
 189
 190 void Compositor::SetRootLayer(Layer* root_layer) {
 191   if (root_layer_ == root_layer)
 192     return;
 193   if (root_layer_)
 194     root_layer_->SetCompositor(NULL);
 195   root_layer_ = root_layer;
 196   if (root_layer_ && !root_layer_->GetCompositor())
 197     root_layer_->SetCompositor(this);
 198   root_web_layer_->RemoveAllChildren();
 199   if (root_layer_)
 200     root_web_layer_->AddChild(root_layer_->cc_layer());
 201 }
 202
 203 void Compositor::SetHostHasTransparentBackground(
 204     bool host_has_transparent_background) {
 205   host_->set_has_transparent_background(host_has_transparent_background);
 206 }
 207
 208 void Compositor::Draw() {
 209   DCHECK(!compositor_thread_loop_);
 210
 211   defer_draw_scheduling_ = false;
 212   if (waiting_on_compositing_end_) {
 213     draw_on_compositing_end_ = true;
 214     return;
 215   }
 216   if (!root_layer_)
 217     return;
 218
 219   TRACE_EVENT_ASYNC_BEGIN0("ui", "Compositor::Draw", last_started_frame_ + 1);
 220
 221   DCHECK_NE(swap_state_, SWAP_POSTED);
 222   swap_state_ = SWAP_NONE;
 223
 224   waiting_on_compositing_end_ = true;
 225   last_started_frame_++;
 226   if (!IsLocked()) {
 227     // TODO(nduca): Temporary while compositor calls
 228     // compositeImmediately() directly.
 229     base::TimeTicks now = gfx::FrameTime::Now();
 230     Animate(now);
 231     Layout();
 232     host_->Composite(now);
 233   }
 234   if (swap_state_ == SWAP_NONE)
 235     NotifyEnd();
 236 }
 237
 238 void Compositor::ScheduleFullRedraw() {
 239   host_->SetNeedsRedraw();
 240 }
 241
 242 void Compositor::ScheduleRedrawRect(const gfx::Rect& damage_rect) {
 243   host_->SetNeedsRedrawRect(damage_rect);
 244 }
 245
 246 void Compositor::FinishAllRendering() {
 247   host_->FinishAllRendering();
 248 }
 249
 250 void Compositor::SetLatencyInfo(const ui::LatencyInfo& latency_info) {
 251   scoped_ptr<cc::SwapPromise> swap_promise(
 252       new cc::LatencyInfoSwapPromise(latency_info));
 253   host_->QueueSwapPromise(swap_promise.Pass());
 254 }
 255
 256 void Compositor::SetScaleAndSize(float scale, const gfx::Size& size_in_pixel) {
 257   DCHECK_GT(scale, 0);
 258   if (!size_in_pixel.IsEmpty()) {
 259     size_ = size_in_pixel;
 260     host_->SetViewportSize(size_in_pixel);
 261     root_web_layer_->SetBounds(size_in_pixel);
 262   }
 263   if (device_scale_factor_ != scale) {
 264     device_scale_factor_ = scale;
 265     host_->SetDeviceScaleFactor(scale);
 266     if (root_layer_)
 267       root_layer_->OnDeviceScaleFactorChanged(scale);
 268   }
 269 }
 270
 271 void Compositor::SetBackgroundColor(SkColor color) {
 272   host_->set_background_color(color);
 273   ScheduleDraw();
 274 }
 275
 276 scoped_refptr<CompositorVSyncManager> Compositor::vsync_manager() const {
 277   return vsync_manager_;
 278 }
 279
 280 void Compositor::AddObserver(CompositorObserver* observer) {
 281   observer_list_.AddObserver(observer);
 282 }
 283
 284 void Compositor::RemoveObserver(CompositorObserver* observer) {
 285   observer_list_.RemoveObserver(observer);
 286 }
 287
 288 bool Compositor::HasObserver(CompositorObserver* observer) {
 289   return observer_list_.HasObserver(observer);
 290 }
 291
 292 void Compositor::Animate(base::TimeTicks frame_begin_time) {
 293   layer_animator_collection_.Progress(frame_begin_time);
 294   if (layer_animator_collection_.HasActiveAnimators())
 295     host_->SetNeedsAnimate();
 296 }
 297
 298 void Compositor::Layout() {
 299   // We're sending damage that will be addressed during this composite
 300   // cycle, so we don't need to schedule another composite to address it.
 301   disable_schedule_composite_ = true;
 302   if (root_layer_)
 303     root_layer_->SendDamagedRects();
 304   disable_schedule_composite_ = false;
 305 }
 306
 307 scoped_ptr<cc::OutputSurface> Compositor::CreateOutputSurface(bool fallback) {
 308   return context_factory_->CreateOutputSurface(this, fallback);
 309 }
 310
 311 void Compositor::DidCommit() {
 312   DCHECK(!IsLocked());
 313   FOR_EACH_OBSERVER(CompositorObserver,
 314                     observer_list_,
 315                     OnCompositingDidCommit(this));
 316 }
 317
 318 void Compositor::DidCommitAndDrawFrame() {
 319   base::TimeTicks start_time = gfx::FrameTime::Now();
 320   FOR_EACH_OBSERVER(CompositorObserver,
 321                     observer_list_,
 322                     OnCompositingStarted(this, start_time));
 323 }
 324
 325 void Compositor::DidCompleteSwapBuffers() {
 326   if (compositor_thread_loop_) {
 327     NotifyEnd();
 328   } else {
 329     DCHECK_EQ(swap_state_, SWAP_POSTED);
 330     NotifyEnd();
 331     swap_state_ = SWAP_COMPLETED;
 332   }
 333 }
 334
 335 void Compositor::ScheduleComposite() {
 336   if (!disable_schedule_composite_)
 337     ScheduleDraw();
 338 }
 339
 340 void Compositor::ScheduleAnimation() {
 341   ScheduleComposite();
 342 }
 343
 344 void Compositor::DidPostSwapBuffers() {
 345   DCHECK(!compositor_thread_loop_);
 346   DCHECK_EQ(swap_state_, SWAP_NONE);
 347   swap_state_ = SWAP_POSTED;
 348 }
 349
 350 void Compositor::DidAbortSwapBuffers() {
 351   if (!compositor_thread_loop_) {
 352     if (swap_state_ == SWAP_POSTED) {
 353       NotifyEnd();
 354       swap_state_ = SWAP_COMPLETED;
 355     }
 356   }
 357
 358   FOR_EACH_OBSERVER(CompositorObserver,
 359                     observer_list_,
 360                     OnCompositingAborted(this));
 361 }
 362
 363 void Compositor::ScheduleAnimationForLayerCollection() {
 364   host_->SetNeedsAnimate();
 365 }
 366
 367 const cc::LayerTreeDebugState& Compositor::GetLayerTreeDebugState() const {
 368   return host_->debug_state();
 369 }
 370
 371 void Compositor::SetLayerTreeDebugState(
 372     const cc::LayerTreeDebugState& debug_state) {
 373   host_->SetDebugState(debug_state);
 374 }
 375
 376 scoped_refptr<CompositorLock> Compositor::GetCompositorLock() {
 377   if (!compositor_lock_) {
 378     compositor_lock_ = new CompositorLock(this);
 379     if (compositor_thread_loop_)
 380       host_->SetDeferCommits(true);
 381     FOR_EACH_OBSERVER(CompositorObserver,
 382                       observer_list_,
 383                       OnCompositingLockStateChanged(this));
 384   }
 385   return compositor_lock_;
 386 }
 387
 388 void Compositor::UnlockCompositor() {
 389   DCHECK(compositor_lock_);
 390   compositor_lock_ = NULL;
 391   if (compositor_thread_loop_)
 392     host_->SetDeferCommits(false);
 393   FOR_EACH_OBSERVER(CompositorObserver,
 394                     observer_list_,
 395                     OnCompositingLockStateChanged(this));
 396 }
 397
 398 void Compositor::CancelCompositorLock() {
 399   if (compositor_lock_)
 400     compositor_lock_->CancelLock();
 401 }
 402
 403 void Compositor::NotifyEnd() {
 404   last_ended_frame_++;
 405   TRACE_EVENT_ASYNC_END0("ui", "Compositor::Draw", last_ended_frame_);
 406   waiting_on_compositing_end_ = false;
 407   if (draw_on_compositing_end_) {
 408     draw_on_compositing_end_ = false;
 409
 410     // Call ScheduleDraw() instead of Draw() in order to allow other
 411     // CompositorObservers to be notified before starting another
 412     // draw cycle.
 413     ScheduleDraw();
 414   }
 415   FOR_EACH_OBSERVER(CompositorObserver,
 416                     observer_list_,
 417                     OnCompositingEnded(this));
 418 }
 419
 420 }  // namespace ui