content/renderer/gpu/render_widget_compositor.cc

   1 // Copyright (c) 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 "content/renderer/gpu/render_widget_compositor.h"
   6
   7 #include <limits>
   8 #include <string>
   9
  10 #include "base/command_line.h"
  11 #include "base/logging.h"
  12 #include "base/profiler/scoped_tracker.h"
  13 #include "base/strings/string_number_conversions.h"
  14 #include "base/synchronization/lock.h"
  15 #include "base/sys_info.h"
  16 #include "base/time/time.h"
  17 #include "base/values.h"
  18 #include "cc/base/switches.h"
  19 #include "cc/blink/web_layer_impl.h"
  20 #include "cc/debug/layer_tree_debug_state.h"
  21 #include "cc/debug/micro_benchmark.h"
  22 #include "cc/input/layer_selection_bound.h"
  23 #include "cc/layers/layer.h"
  24 #include "cc/output/begin_frame_args.h"
  25 #include "cc/output/copy_output_request.h"
  26 #include "cc/output/copy_output_result.h"
  27 #include "cc/output/latency_info_swap_promise.h"
  28 #include "cc/output/swap_promise.h"
  29 #include "cc/resources/single_release_callback.h"
  30 #include "cc/scheduler/begin_frame_source.h"
  31 #include "cc/trees/latency_info_swap_promise_monitor.h"
  32 #include "cc/trees/layer_tree_host.h"
  33 #include "content/common/content_switches_internal.h"
  34 #include "content/common/gpu/client/context_provider_command_buffer.h"
  35 #include "content/public/common/content_switches.h"
  36 #include "content/renderer/input/input_handler_manager.h"
  37 #include "content/renderer/scheduler/renderer_scheduler.h"
  38 #include "gpu/command_buffer/client/gles2_interface.h"
  39 #include "third_party/WebKit/public/platform/WebCompositeAndReadbackAsyncCallback.h"
  40 #include "third_party/WebKit/public/platform/WebSelectionBound.h"
  41 #include "third_party/WebKit/public/platform/WebSize.h"
  42 #include "third_party/WebKit/public/web/WebKit.h"
  43 #include "third_party/WebKit/public/web/WebRuntimeFeatures.h"
  44 #include "third_party/WebKit/public/web/WebWidget.h"
  45 #include "ui/gfx/frame_time.h"
  46 #include "ui/gl/gl_switches.h"
  47 #include "ui/native_theme/native_theme_switches.h"
  48
  49 #if defined(OS_ANDROID)
  50 #include "content/renderer/android/synchronous_compositor_factory.h"
  51 #include "ui/gfx/android/device_display_info.h"
  52 #endif
  53
  54 namespace base {
  55 class Value;
  56 }
  57
  58 namespace cc {
  59 class Layer;
  60 }
  61
  62 using blink::WebBeginFrameArgs;
  63 using blink::WebFloatPoint;
  64 using blink::WebRect;
  65 using blink::WebSelectionBound;
  66 using blink::WebSize;
  67 using blink::WebTopControlsState;
  68
  69 namespace content {
  70 namespace {
  71
  72 bool GetSwitchValueAsInt(const base::CommandLine& command_line,
  73                          const std::string& switch_string,
  74                          int min_value,
  75                          int max_value,
  76                          int* result) {
  77   std::string string_value = command_line.GetSwitchValueASCII(switch_string);
  78   int int_value;
  79   if (base::StringToInt(string_value, &int_value) &&
  80       int_value >= min_value && int_value <= max_value) {
  81     *result = int_value;
  82     return true;
  83   } else {
  84     LOG(WARNING) << "Failed to parse switch " << switch_string  << ": " <<
  85         string_value;
  86     return false;
  87   }
  88 }
  89
  90 cc::LayerSelectionBound ConvertWebSelectionBound(
  91     const WebSelectionBound& web_bound) {
  92   DCHECK(web_bound.layerId);
  93
  94   cc::LayerSelectionBound cc_bound;
  95   switch (web_bound.type) {
  96     case blink::WebSelectionBound::Caret:
  97       cc_bound.type = cc::SELECTION_BOUND_CENTER;
  98       break;
  99     case blink::WebSelectionBound::SelectionLeft:
 100       cc_bound.type = cc::SELECTION_BOUND_LEFT;
 101       break;
 102     case blink::WebSelectionBound::SelectionRight:
 103       cc_bound.type = cc::SELECTION_BOUND_RIGHT;
 104       break;
 105   }
 106   cc_bound.layer_id = web_bound.layerId;
 107   cc_bound.edge_top = gfx::Point(web_bound.edgeTopInLayer);
 108   cc_bound.edge_bottom = gfx::Point(web_bound.edgeBottomInLayer);
 109   return cc_bound;
 110 }
 111
 112 gfx::Size CalculateDefaultTileSize(RenderWidget* widget) {
 113   int default_tile_size = 256;
 114 #if defined(OS_ANDROID)
 115   // TODO(epenner): unify this for all platforms if it
 116   // makes sense (http://crbug.com/159524)
 117
 118   gfx::DeviceDisplayInfo info;
 119   bool real_size_supported = true;
 120   int display_width = info.GetPhysicalDisplayWidth();
 121   int display_height = info.GetPhysicalDisplayHeight();
 122   if (display_width == 0 || display_height == 0) {
 123     real_size_supported = false;
 124     display_width = info.GetDisplayWidth();
 125     display_height = info.GetDisplayHeight();
 126   }
 127
 128   int portrait_width = std::min(display_width, display_height);
 129   int landscape_width = std::max(display_width, display_height);
 130
 131   if (real_size_supported) {
 132     // Maximum HD dimensions should be 768x1280
 133     // Maximum FHD dimensions should be 1200x1920
 134     if (portrait_width > 768 || landscape_width > 1280)
 135       default_tile_size = 384;
 136     if (portrait_width > 1200 || landscape_width > 1920)
 137       default_tile_size = 512;
 138
 139     // Adjust for some resolutions that barely straddle an extra
 140     // tile when in portrait mode. This helps worst case scroll/raster
 141     // by not needing a full extra tile for each row.
 142     if (default_tile_size == 256 && portrait_width == 768)
 143       default_tile_size += 32;
 144     if (default_tile_size == 384 && portrait_width == 1200)
 145       default_tile_size += 32;
 146   } else {
 147     // We don't know the exact resolution due to screen controls etc.
 148     // So this just estimates the values above using tile counts.
 149     int numTiles = (display_width * display_height) / (256 * 256);
 150     if (numTiles > 16)
 151       default_tile_size = 384;
 152     if (numTiles >= 40)
 153       default_tile_size = 512;
 154   }
 155 #elif defined(OS_CHROMEOS)
 156   // Use 512 for high DPI (dsf=2.0f) devices.
 157   if (widget->screen_info().deviceScaleFactor >= 2.0f)
 158     default_tile_size = 512;
 159 #endif
 160
 161   return gfx::Size(default_tile_size, default_tile_size);
 162 }
 163
 164 // Check cc::TopControlsState, and blink::WebTopControlsState
 165 // are kept in sync.
 166 static_assert(int(blink::WebTopControlsBoth) == int(cc::BOTH),
 167               "mismatching enums: BOTH");
 168 static_assert(int(blink::WebTopControlsHidden) == int(cc::HIDDEN),
 169               "mismatching enums: HIDDEN");
 170 static_assert(int(blink::WebTopControlsShown) == int(cc::SHOWN),
 171               "mismatching enums: SHOWN");
 172
 173 static cc::TopControlsState ConvertTopControlsState(
 174     WebTopControlsState state) {
 175   return static_cast<cc::TopControlsState>(state);
 176 }
 177
 178 }  // namespace
 179
 180 // static
 181 scoped_ptr<RenderWidgetCompositor> RenderWidgetCompositor::Create(
 182     RenderWidget* widget,
 183     CompositorDependencies* compositor_deps) {
 184   scoped_ptr<RenderWidgetCompositor> compositor(
 185       new RenderWidgetCompositor(widget, compositor_deps));
 186   compositor->Initialize();
 187   return compositor;
 188 }
 189
 190 RenderWidgetCompositor::RenderWidgetCompositor(
 191     RenderWidget* widget,
 192     CompositorDependencies* compositor_deps)
 193     : num_failed_recreate_attempts_(0),
 194       widget_(widget),
 195       compositor_deps_(compositor_deps),
 196       weak_factory_(this) {
 197 }
 198
 199 void RenderWidgetCompositor::Initialize() {
 200   base::CommandLine* cmd = base::CommandLine::ForCurrentProcess();
 201
 202   cc::LayerTreeSettings settings;
 203
 204   // For web contents, layer transforms should scale up the contents of layers
 205   // to keep content always crisp when possible.
 206   settings.layer_transforms_should_scale_layer_contents = true;
 207
 208   settings.throttle_frame_production =
 209       !cmd->HasSwitch(switches::kDisableGpuVsync);
 210   settings.use_external_begin_frame_source =
 211       cmd->HasSwitch(switches::kEnableBeginFrameScheduling);
 212   settings.main_frame_before_activation_enabled =
 213       cmd->HasSwitch(cc::switches::kEnableMainFrameBeforeActivation) &&
 214       !cmd->HasSwitch(cc::switches::kDisableMainFrameBeforeActivation);
 215   settings.report_overscroll_only_for_scrollable_axes =
 216       !compositor_deps_->IsElasticOverscrollEnabled();
 217   settings.accelerated_animation_enabled =
 218       !cmd->HasSwitch(cc::switches::kDisableThreadedAnimation);
 219   settings.use_display_lists = cmd->HasSwitch(switches::kEnableSlimmingPaint);
 220   if (cmd->HasSwitch(switches::kEnableCompositorAnimationTimelines)) {
 221     settings.use_compositor_animation_timelines = true;
 222     blink::WebRuntimeFeatures::enableCompositorAnimationTimelines(true);
 223   }
 224
 225   settings.default_tile_size = CalculateDefaultTileSize(widget_);
 226   if (cmd->HasSwitch(switches::kDefaultTileWidth)) {
 227     int tile_width = 0;
 228     GetSwitchValueAsInt(*cmd,
 229                         switches::kDefaultTileWidth,
 230                         1,
 231                         std::numeric_limits<int>::max(),
 232                         &tile_width);
 233     settings.default_tile_size.set_width(tile_width);
 234   }
 235   if (cmd->HasSwitch(switches::kDefaultTileHeight)) {
 236     int tile_height = 0;
 237     GetSwitchValueAsInt(*cmd,
 238                         switches::kDefaultTileHeight,
 239                         1,
 240                         std::numeric_limits<int>::max(),
 241                         &tile_height);
 242     settings.default_tile_size.set_height(tile_height);
 243   }
 244
 245   int max_untiled_layer_width = settings.max_untiled_layer_size.width();
 246   if (cmd->HasSwitch(switches::kMaxUntiledLayerWidth)) {
 247     GetSwitchValueAsInt(*cmd, switches::kMaxUntiledLayerWidth, 1,
 248                         std::numeric_limits<int>::max(),
 249                         &max_untiled_layer_width);
 250   }
 251   int max_untiled_layer_height = settings.max_untiled_layer_size.height();
 252   if (cmd->HasSwitch(switches::kMaxUntiledLayerHeight)) {
 253     GetSwitchValueAsInt(*cmd, switches::kMaxUntiledLayerHeight, 1,
 254                         std::numeric_limits<int>::max(),
 255                         &max_untiled_layer_height);
 256   }
 257
 258   settings.max_untiled_layer_size = gfx::Size(max_untiled_layer_width,
 259                                            max_untiled_layer_height);
 260
 261   settings.gpu_rasterization_msaa_sample_count =
 262       compositor_deps_->GetGpuRasterizationMSAASampleCount();
 263   settings.impl_side_painting = compositor_deps_->IsImplSidePaintingEnabled();
 264   settings.gpu_rasterization_forced =
 265       compositor_deps_->IsGpuRasterizationForced();
 266   settings.gpu_rasterization_enabled =
 267       compositor_deps_->IsGpuRasterizationEnabled();
 268
 269   settings.can_use_lcd_text = compositor_deps_->IsLcdTextEnabled();
 270   settings.use_distance_field_text =
 271       compositor_deps_->IsDistanceFieldTextEnabled();
 272   settings.use_zero_copy = compositor_deps_->IsZeroCopyEnabled();
 273   settings.use_one_copy = compositor_deps_->IsOneCopyEnabled();
 274   settings.enable_elastic_overscroll =
 275       compositor_deps_->IsElasticOverscrollEnabled();
 276   settings.use_image_texture_target = compositor_deps_->GetImageTextureTarget();
 277   settings.gather_pixel_refs = compositor_deps_->IsGatherPixelRefsEnabled();
 278
 279   if (cmd->HasSwitch(cc::switches::kTopControlsShowThreshold)) {
 280       std::string top_threshold_str =
 281           cmd->GetSwitchValueASCII(cc::switches::kTopControlsShowThreshold);
 282       double show_threshold;
 283       if (base::StringToDouble(top_threshold_str, &show_threshold) &&
 284           show_threshold >= 0.f && show_threshold <= 1.f)
 285         settings.top_controls_show_threshold = show_threshold;
 286   }
 287
 288   if (cmd->HasSwitch(cc::switches::kTopControlsHideThreshold)) {
 289       std::string top_threshold_str =
 290           cmd->GetSwitchValueASCII(cc::switches::kTopControlsHideThreshold);
 291       double hide_threshold;
 292       if (base::StringToDouble(top_threshold_str, &hide_threshold) &&
 293           hide_threshold >= 0.f && hide_threshold <= 1.f)
 294         settings.top_controls_hide_threshold = hide_threshold;
 295   }
 296
 297   settings.use_pinch_virtual_viewport =
 298       cmd->HasSwitch(cc::switches::kEnablePinchVirtualViewport);
 299   settings.verify_property_trees =
 300       cmd->HasSwitch(cc::switches::kEnablePropertyTreeVerification);
 301   settings.renderer_settings.allow_antialiasing &=
 302       !cmd->HasSwitch(cc::switches::kDisableCompositedAntialiasing);
 303   settings.single_thread_proxy_scheduler =
 304       compositor_deps_->UseSingleThreadScheduler();
 305
 306   // These flags should be mirrored by UI versions in ui/compositor/.
 307   settings.initial_debug_state.show_debug_borders =
 308       cmd->HasSwitch(cc::switches::kShowCompositedLayerBorders);
 309   settings.initial_debug_state.show_fps_counter =
 310       cmd->HasSwitch(cc::switches::kShowFPSCounter);
 311   settings.initial_debug_state.show_layer_animation_bounds_rects =
 312       cmd->HasSwitch(cc::switches::kShowLayerAnimationBounds);
 313   settings.initial_debug_state.show_paint_rects =
 314       cmd->HasSwitch(switches::kShowPaintRects);
 315   settings.initial_debug_state.show_property_changed_rects =
 316       cmd->HasSwitch(cc::switches::kShowPropertyChangedRects);
 317   settings.initial_debug_state.show_surface_damage_rects =
 318       cmd->HasSwitch(cc::switches::kShowSurfaceDamageRects);
 319   settings.initial_debug_state.show_screen_space_rects =
 320       cmd->HasSwitch(cc::switches::kShowScreenSpaceRects);
 321   settings.initial_debug_state.show_replica_screen_space_rects =
 322       cmd->HasSwitch(cc::switches::kShowReplicaScreenSpaceRects);
 323
 324   settings.initial_debug_state.SetRecordRenderingStats(
 325       cmd->HasSwitch(cc::switches::kEnableGpuBenchmarking));
 326
 327   if (cmd->HasSwitch(cc::switches::kSlowDownRasterScaleFactor)) {
 328     const int kMinSlowDownScaleFactor = 0;
 329     const int kMaxSlowDownScaleFactor = INT_MAX;
 330     GetSwitchValueAsInt(
 331         *cmd,
 332         cc::switches::kSlowDownRasterScaleFactor,
 333         kMinSlowDownScaleFactor,
 334         kMaxSlowDownScaleFactor,
 335         &settings.initial_debug_state.slow_down_raster_scale_factor);
 336   }
 337
 338   if (cmd->HasSwitch(cc::switches::kMaxTilesForInterestArea)) {
 339     int max_tiles_for_interest_area;
 340     if (GetSwitchValueAsInt(*cmd,
 341                             cc::switches::kMaxTilesForInterestArea,
 342                             1, std::numeric_limits<int>::max(),
 343                             &max_tiles_for_interest_area))
 344       settings.max_tiles_for_interest_area = max_tiles_for_interest_area;
 345   }
 346
 347   if (cmd->HasSwitch(cc::switches::kMaxUnusedResourceMemoryUsagePercentage)) {
 348     int max_unused_resource_memory_percentage;
 349     if (GetSwitchValueAsInt(
 350             *cmd,
 351             cc::switches::kMaxUnusedResourceMemoryUsagePercentage,
 352             0, 100,
 353             &max_unused_resource_memory_percentage)) {
 354       settings.max_unused_resource_memory_percentage =
 355           max_unused_resource_memory_percentage;
 356     }
 357   }
 358
 359   settings.strict_layer_property_change_checking =
 360       cmd->HasSwitch(cc::switches::kStrictLayerPropertyChangeChecking);
 361
 362 #if defined(OS_ANDROID)
 363   SynchronousCompositorFactory* synchronous_compositor_factory =
 364       SynchronousCompositorFactory::GetInstance();
 365
 366   // We can't use GPU rasterization on low-end devices, because the Ganesh
 367   // cache would consume too much memory.
 368   if (base::SysInfo::IsLowEndDevice())
 369     settings.gpu_rasterization_enabled = false;
 370   settings.using_synchronous_renderer_compositor =
 371       synchronous_compositor_factory;
 372   settings.record_full_layer = widget_->DoesRecordFullLayer();
 373   settings.report_overscroll_only_for_scrollable_axes =
 374       !synchronous_compositor_factory;
 375   settings.max_partial_texture_updates = 0;
 376   if (synchronous_compositor_factory) {
 377     // Android WebView uses system scrollbars, so make ours invisible.
 378     settings.scrollbar_animator = cc::LayerTreeSettings::NO_ANIMATOR;
 379     settings.solid_color_scrollbar_color = SK_ColorTRANSPARENT;
 380   } else {
 381     settings.scrollbar_animator = cc::LayerTreeSettings::LINEAR_FADE;
 382     settings.scrollbar_fade_delay_ms = 300;
 383     settings.scrollbar_fade_resize_delay_ms = 2000;
 384     settings.scrollbar_fade_duration_ms = 300;
 385     settings.solid_color_scrollbar_color = SkColorSetARGB(128, 128, 128, 128);
 386   }
 387   settings.renderer_settings.highp_threshold_min = 2048;
 388   // Android WebView handles root layer flings itself.
 389   settings.ignore_root_layer_flings =
 390       synchronous_compositor_factory;
 391   // Memory policy on Android WebView does not depend on whether device is
 392   // low end, so always use default policy.
 393   bool use_low_memory_policy =
 394       base::SysInfo::IsLowEndDevice() && !synchronous_compositor_factory;
 395   // RGBA_4444 textures are only enabled for low end devices
 396   // and are disabled for Android WebView as it doesn't support the format.
 397   settings.renderer_settings.use_rgba_4444_textures = use_low_memory_policy;
 398   if (use_low_memory_policy) {
 399     // On low-end we want to be very carefull about killing other
 400     // apps. So initially we use 50% more memory to avoid flickering
 401     // or raster-on-demand.
 402     settings.max_memory_for_prepaint_percentage = 67;
 403   } else {
 404     // On other devices we have increased memory excessively to avoid
 405     // raster-on-demand already, so now we reserve 50% _only_ to avoid
 406     // raster-on-demand, and use 50% of the memory otherwise.
 407     settings.max_memory_for_prepaint_percentage = 50;
 408   }
 409   // Webview does not own the surface so should not clear it.
 410   settings.renderer_settings.should_clear_root_render_pass =
 411       !synchronous_compositor_factory;
 412
 413   // TODO(danakj): Only do this on low end devices.
 414   settings.create_low_res_tiling = true;
 415
 416 #elif !defined(OS_MACOSX)
 417   if (ui::IsOverlayScrollbarEnabled()) {
 418     settings.scrollbar_animator = cc::LayerTreeSettings::THINNING;
 419     settings.solid_color_scrollbar_color = SkColorSetARGB(128, 128, 128, 128);
 420   } else if (cmd->HasSwitch(cc::switches::kEnablePinchVirtualViewport)) {
 421     // use_pinch_zoom_scrollbars is only true on desktop when non-overlay
 422     // scrollbars are in use.
 423     settings.use_pinch_zoom_scrollbars = true;
 424     settings.scrollbar_animator = cc::LayerTreeSettings::LINEAR_FADE;
 425     settings.solid_color_scrollbar_color = SkColorSetARGB(128, 128, 128, 128);
 426   }
 427   settings.scrollbar_fade_delay_ms = 500;
 428   settings.scrollbar_fade_resize_delay_ms = 500;
 429   settings.scrollbar_fade_duration_ms = 300;
 430
 431   // When pinching in, only show the pinch-viewport overlay scrollbars if the
 432   // page scale is at least some threshold away from the minimum. i.e. don't
 433   // show the pinch scrollbars when at minimum scale.
 434   settings.scrollbar_show_scale_threshold = 1.05f;
 435 #endif
 436
 437   if (cmd->HasSwitch(switches::kEnableLowResTiling))
 438     settings.create_low_res_tiling = true;
 439   if (cmd->HasSwitch(switches::kDisableLowResTiling))
 440     settings.create_low_res_tiling = false;
 441
 442   scoped_refptr<base::SingleThreadTaskRunner> compositor_thread_task_runner =
 443       compositor_deps_->GetCompositorImplThreadTaskRunner();
 444   scoped_refptr<base::SingleThreadTaskRunner>
 445       main_thread_compositor_task_runner =
 446           compositor_deps_->GetCompositorMainThreadTaskRunner();
 447   cc::SharedBitmapManager* shared_bitmap_manager =
 448       compositor_deps_->GetSharedBitmapManager();
 449   gpu::GpuMemoryBufferManager* gpu_memory_buffer_manager =
 450       compositor_deps_->GetGpuMemoryBufferManager();
 451   cc::TaskGraphRunner* task_graph_runner =
 452       compositor_deps_->GetTaskGraphRunner();
 453
 454   scoped_ptr<cc::BeginFrameSource> external_begin_frame_source;
 455   if (settings.use_external_begin_frame_source) {
 456     external_begin_frame_source =
 457         compositor_deps_->CreateExternalBeginFrameSource(widget_->routing_id());
 458   }
 459
 460   if (compositor_thread_task_runner.get()) {
 461     layer_tree_host_ = cc::LayerTreeHost::CreateThreaded(
 462         this, shared_bitmap_manager, gpu_memory_buffer_manager,
 463         task_graph_runner, settings, main_thread_compositor_task_runner,
 464         compositor_thread_task_runner, external_begin_frame_source.Pass());
 465   } else {
 466     layer_tree_host_ = cc::LayerTreeHost::CreateSingleThreaded(
 467         this, this, shared_bitmap_manager, gpu_memory_buffer_manager,
 468         task_graph_runner, settings, main_thread_compositor_task_runner,
 469         external_begin_frame_source.Pass());
 470   }
 471   DCHECK(layer_tree_host_);
 472 }
 473
 474 RenderWidgetCompositor::~RenderWidgetCompositor() {}
 475
 476 const base::WeakPtr<cc::InputHandler>&
 477 RenderWidgetCompositor::GetInputHandler() {
 478   return layer_tree_host_->GetInputHandler();
 479 }
 480
 481 bool RenderWidgetCompositor::BeginMainFrameRequested() const {
 482   return layer_tree_host_->BeginMainFrameRequested();
 483 }
 484
 485 void RenderWidgetCompositor::SetNeedsDisplayOnAllLayers() {
 486   layer_tree_host_->SetNeedsDisplayOnAllLayers();
 487 }
 488
 489 void RenderWidgetCompositor::SetRasterizeOnlyVisibleContent() {
 490   cc::LayerTreeDebugState current = layer_tree_host_->debug_state();
 491   current.rasterize_only_visible_content = true;
 492   layer_tree_host_->SetDebugState(current);
 493 }
 494
 495 void RenderWidgetCompositor::SetNeedsRedrawRect(gfx::Rect damage_rect) {
 496   layer_tree_host_->SetNeedsRedrawRect(damage_rect);
 497 }
 498
 499 void RenderWidgetCompositor::SetNeedsForcedRedraw() {
 500   layer_tree_host_->SetNextCommitForcesRedraw();
 501   setNeedsAnimate();
 502 }
 503
 504 scoped_ptr<cc::SwapPromiseMonitor>
 505 RenderWidgetCompositor::CreateLatencyInfoSwapPromiseMonitor(
 506     ui::LatencyInfo* latency) {
 507   return scoped_ptr<cc::SwapPromiseMonitor>(
 508       new cc::LatencyInfoSwapPromiseMonitor(
 509           latency, layer_tree_host_.get(), NULL));
 510 }
 511
 512 void RenderWidgetCompositor::QueueSwapPromise(
 513     scoped_ptr<cc::SwapPromise> swap_promise) {
 514   layer_tree_host_->QueueSwapPromise(swap_promise.Pass());
 515 }
 516
 517 int RenderWidgetCompositor::GetLayerTreeId() const {
 518   return layer_tree_host_->id();
 519 }
 520
 521 int RenderWidgetCompositor::GetSourceFrameNumber() const {
 522   return layer_tree_host_->source_frame_number();
 523 }
 524
 525 void RenderWidgetCompositor::SetNeedsUpdateLayers() {
 526   layer_tree_host_->SetNeedsUpdateLayers();
 527 }
 528
 529 void RenderWidgetCompositor::SetNeedsCommit() {
 530   layer_tree_host_->SetNeedsCommit();
 531 }
 532
 533 void RenderWidgetCompositor::NotifyInputThrottledUntilCommit() {
 534   layer_tree_host_->NotifyInputThrottledUntilCommit();
 535 }
 536
 537 const cc::Layer* RenderWidgetCompositor::GetRootLayer() const {
 538   return layer_tree_host_->root_layer();
 539 }
 540
 541 int RenderWidgetCompositor::ScheduleMicroBenchmark(
 542     const std::string& name,
 543     scoped_ptr<base::Value> value,
 544     const base::Callback<void(scoped_ptr<base::Value>)>& callback) {
 545   return layer_tree_host_->ScheduleMicroBenchmark(name, value.Pass(), callback);
 546 }
 547
 548 bool RenderWidgetCompositor::SendMessageToMicroBenchmark(
 549     int id,
 550     scoped_ptr<base::Value> value) {
 551   return layer_tree_host_->SendMessageToMicroBenchmark(id, value.Pass());
 552 }
 553
 554 void RenderWidgetCompositor::StartCompositor() {
 555   layer_tree_host_->SetLayerTreeHostClientReady();
 556 }
 557
 558 void RenderWidgetCompositor::setRootLayer(const blink::WebLayer& layer) {
 559   layer_tree_host_->SetRootLayer(
 560       static_cast<const cc_blink::WebLayerImpl*>(&layer)->layer());
 561 }
 562
 563 void RenderWidgetCompositor::clearRootLayer() {
 564   layer_tree_host_->SetRootLayer(scoped_refptr<cc::Layer>());
 565 }
 566
 567 void RenderWidgetCompositor::setViewportSize(
 568     const WebSize&,
 569     const WebSize& device_viewport_size) {
 570   layer_tree_host_->SetViewportSize(device_viewport_size);
 571 }
 572
 573 void RenderWidgetCompositor::setViewportSize(
 574     const WebSize& device_viewport_size) {
 575   layer_tree_host_->SetViewportSize(device_viewport_size);
 576 }
 577
 578 WebSize RenderWidgetCompositor::layoutViewportSize() const {
 579   return layer_tree_host_->device_viewport_size();
 580 }
 581
 582 WebSize RenderWidgetCompositor::deviceViewportSize() const {
 583   return layer_tree_host_->device_viewport_size();
 584 }
 585
 586 WebFloatPoint RenderWidgetCompositor::adjustEventPointForPinchZoom(
 587     const WebFloatPoint& point) const {
 588   return point;
 589 }
 590
 591 void RenderWidgetCompositor::setDeviceScaleFactor(float device_scale) {
 592   layer_tree_host_->SetDeviceScaleFactor(device_scale);
 593 }
 594
 595 float RenderWidgetCompositor::deviceScaleFactor() const {
 596   return layer_tree_host_->device_scale_factor();
 597 }
 598
 599 void RenderWidgetCompositor::setBackgroundColor(blink::WebColor color) {
 600   layer_tree_host_->set_background_color(color);
 601 }
 602
 603 void RenderWidgetCompositor::setHasTransparentBackground(bool transparent) {
 604   layer_tree_host_->set_has_transparent_background(transparent);
 605 }
 606
 607 void RenderWidgetCompositor::setVisible(bool visible) {
 608   layer_tree_host_->SetVisible(visible);
 609 }
 610
 611 void RenderWidgetCompositor::setPageScaleFactorAndLimits(
 612     float page_scale_factor, float minimum, float maximum) {
 613   layer_tree_host_->SetPageScaleFactorAndLimits(
 614       page_scale_factor, minimum, maximum);
 615 }
 616
 617 void RenderWidgetCompositor::startPageScaleAnimation(
 618     const blink::WebPoint& destination,
 619     bool use_anchor,
 620     float new_page_scale,
 621     double duration_sec) {
 622   base::TimeDelta duration = base::TimeDelta::FromMicroseconds(
 623       duration_sec * base::Time::kMicrosecondsPerSecond);
 624   layer_tree_host_->StartPageScaleAnimation(
 625       gfx::Vector2d(destination.x, destination.y),
 626       use_anchor,
 627       new_page_scale,
 628       duration);
 629 }
 630
 631 void RenderWidgetCompositor::heuristicsForGpuRasterizationUpdated(
 632     bool matches_heuristics) {
 633   layer_tree_host_->SetHasGpuRasterizationTrigger(matches_heuristics);
 634 }
 635
 636 void RenderWidgetCompositor::setNeedsAnimate() {
 637   layer_tree_host_->SetNeedsAnimate();
 638 }
 639
 640 bool RenderWidgetCompositor::commitRequested() const {
 641   return layer_tree_host_->CommitRequested();
 642 }
 643
 644 void RenderWidgetCompositor::didStopFlinging() {
 645   layer_tree_host_->DidStopFlinging();
 646 }
 647
 648 void RenderWidgetCompositor::registerForAnimations(blink::WebLayer* layer) {
 649   cc::Layer* cc_layer = static_cast<cc_blink::WebLayerImpl*>(layer)->layer();
 650   cc_layer->layer_animation_controller()->SetAnimationRegistrar(
 651       layer_tree_host_->animation_registrar());
 652 }
 653
 654 void RenderWidgetCompositor::registerViewportLayers(
 655     const blink::WebLayer* overscrollElasticityLayer,
 656     const blink::WebLayer* pageScaleLayer,
 657     const blink::WebLayer* innerViewportScrollLayer,
 658     const blink::WebLayer* outerViewportScrollLayer) {
 659   layer_tree_host_->RegisterViewportLayers(
 660       // The scroll elasticity layer will only exist when using pinch virtual
 661       // viewports.
 662       overscrollElasticityLayer
 663           ? static_cast<const cc_blink::WebLayerImpl*>(
 664                 overscrollElasticityLayer)->layer()
 665           : NULL,
 666       static_cast<const cc_blink::WebLayerImpl*>(pageScaleLayer)->layer(),
 667       static_cast<const cc_blink::WebLayerImpl*>(innerViewportScrollLayer)
 668           ->layer(),
 669       // The outer viewport layer will only exist when using pinch virtual
 670       // viewports.
 671       outerViewportScrollLayer
 672           ? static_cast<const cc_blink::WebLayerImpl*>(outerViewportScrollLayer)
 673                 ->layer()
 674           : NULL);
 675 }
 676
 677 void RenderWidgetCompositor::clearViewportLayers() {
 678   layer_tree_host_->RegisterViewportLayers(
 679       scoped_refptr<cc::Layer>(), scoped_refptr<cc::Layer>(),
 680       scoped_refptr<cc::Layer>(), scoped_refptr<cc::Layer>());
 681 }
 682
 683 void RenderWidgetCompositor::registerSelection(
 684     const blink::WebSelectionBound& start,
 685     const blink::WebSelectionBound& end) {
 686   layer_tree_host_->RegisterSelection(ConvertWebSelectionBound(start),
 687                                       ConvertWebSelectionBound(end));
 688 }
 689
 690 void RenderWidgetCompositor::clearSelection() {
 691   cc::LayerSelectionBound empty_selection;
 692   layer_tree_host_->RegisterSelection(empty_selection, empty_selection);
 693 }
 694
 695 void CompositeAndReadbackAsyncCallback(
 696     blink::WebCompositeAndReadbackAsyncCallback* callback,
 697     scoped_ptr<cc::CopyOutputResult> result) {
 698   if (result->HasBitmap()) {
 699     scoped_ptr<SkBitmap> result_bitmap = result->TakeBitmap();
 700     callback->didCompositeAndReadback(*result_bitmap);
 701   } else {
 702     callback->didCompositeAndReadback(SkBitmap());
 703   }
 704 }
 705
 706 void RenderWidgetCompositor::compositeAndReadbackAsync(
 707     blink::WebCompositeAndReadbackAsyncCallback* callback) {
 708   DCHECK(!temporary_copy_output_request_);
 709   temporary_copy_output_request_ =
 710       cc::CopyOutputRequest::CreateBitmapRequest(
 711           base::Bind(&CompositeAndReadbackAsyncCallback, callback));
 712   // Force a commit to happen. The temporary copy output request will
 713   // be installed after layout which will happen as a part of the commit, for
 714   // widgets that delay the creation of their output surface.
 715   bool threaded = !!compositor_deps_->GetCompositorImplThreadTaskRunner().get();
 716   if (!threaded &&
 717       !layer_tree_host_->settings().single_thread_proxy_scheduler) {
 718     layer_tree_host_->Composite(gfx::FrameTime::Now());
 719   } else {
 720     layer_tree_host_->SetNeedsCommit();
 721   }
 722 }
 723
 724 void RenderWidgetCompositor::finishAllRendering() {
 725   layer_tree_host_->FinishAllRendering();
 726 }
 727
 728 void RenderWidgetCompositor::setDeferCommits(bool defer_commits) {
 729   layer_tree_host_->SetDeferCommits(defer_commits);
 730 }
 731
 732 void RenderWidgetCompositor::setShowFPSCounter(bool show) {
 733   cc::LayerTreeDebugState debug_state = layer_tree_host_->debug_state();
 734   debug_state.show_fps_counter = show;
 735   layer_tree_host_->SetDebugState(debug_state);
 736 }
 737
 738 void RenderWidgetCompositor::setShowPaintRects(bool show) {
 739   cc::LayerTreeDebugState debug_state = layer_tree_host_->debug_state();
 740   debug_state.show_paint_rects = show;
 741   layer_tree_host_->SetDebugState(debug_state);
 742 }
 743
 744 void RenderWidgetCompositor::setShowDebugBorders(bool show) {
 745   cc::LayerTreeDebugState debug_state = layer_tree_host_->debug_state();
 746   debug_state.show_debug_borders = show;
 747   layer_tree_host_->SetDebugState(debug_state);
 748 }
 749
 750 void RenderWidgetCompositor::setContinuousPaintingEnabled(bool enabled) {
 751   cc::LayerTreeDebugState debug_state = layer_tree_host_->debug_state();
 752   debug_state.continuous_painting = enabled;
 753   layer_tree_host_->SetDebugState(debug_state);
 754 }
 755
 756 void RenderWidgetCompositor::setShowScrollBottleneckRects(bool show) {
 757   cc::LayerTreeDebugState debug_state = layer_tree_host_->debug_state();
 758   debug_state.show_touch_event_handler_rects = show;
 759   debug_state.show_wheel_event_handler_rects = show;
 760   debug_state.show_non_fast_scrollable_rects = show;
 761   layer_tree_host_->SetDebugState(debug_state);
 762 }
 763
 764 void RenderWidgetCompositor::updateTopControlsState(
 765     WebTopControlsState constraints,
 766     WebTopControlsState current,
 767     bool animate) {
 768   layer_tree_host_->UpdateTopControlsState(ConvertTopControlsState(constraints),
 769                                            ConvertTopControlsState(current),
 770                                            animate);
 771 }
 772
 773 void RenderWidgetCompositor::setTopControlsHeight(float height, bool shrink) {
 774     layer_tree_host_->SetTopControlsHeight(height, shrink);
 775 }
 776
 777 void RenderWidgetCompositor::setTopControlsShownRatio(float ratio) {
 778   layer_tree_host_->SetTopControlsShownRatio(ratio);
 779 }
 780
 781 void RenderWidgetCompositor::WillBeginMainFrame() {
 782   widget_->willBeginCompositorFrame();
 783 }
 784
 785 void RenderWidgetCompositor::DidBeginMainFrame() {
 786 }
 787
 788 void RenderWidgetCompositor::BeginMainFrame(const cc::BeginFrameArgs& args) {
 789   double frame_time_sec = (args.frame_time - base::TimeTicks()).InSecondsF();
 790   double deadline_sec = (args.deadline - base::TimeTicks()).InSecondsF();
 791   double interval_sec = args.interval.InSecondsF();
 792   WebBeginFrameArgs web_begin_frame_args =
 793       WebBeginFrameArgs(frame_time_sec, deadline_sec, interval_sec);
 794   compositor_deps_->GetRendererScheduler()->WillBeginFrame(args);
 795   widget_->webwidget()->beginFrame(web_begin_frame_args);
 796 }
 797
 798 void RenderWidgetCompositor::BeginMainFrameNotExpectedSoon() {
 799   compositor_deps_->GetRendererScheduler()->BeginFrameNotExpectedSoon();
 800 }
 801
 802 void RenderWidgetCompositor::Layout() {
 803   widget_->webwidget()->layout();
 804
 805   if (temporary_copy_output_request_) {
 806     // For WebViewImpl, this will always have a root layer.  For other widgets,
 807     // the widget may be closed before servicing this request, so ignore it.
 808     if (cc::Layer* root_layer = layer_tree_host_->root_layer()) {
 809       root_layer->RequestCopyOfOutput(temporary_copy_output_request_.Pass());
 810     } else {
 811       temporary_copy_output_request_->SendEmptyResult();
 812       temporary_copy_output_request_ = nullptr;
 813     }
 814   }
 815 }
 816
 817 void RenderWidgetCompositor::ApplyViewportDeltas(
 818     const gfx::Vector2dF& inner_delta,
 819     const gfx::Vector2dF& outer_delta,
 820     const gfx::Vector2dF& elastic_overscroll_delta,
 821     float page_scale,
 822     float top_controls_delta) {
 823   widget_->webwidget()->applyViewportDeltas(
 824       inner_delta,
 825       outer_delta,
 826       elastic_overscroll_delta,
 827       page_scale,
 828       top_controls_delta);
 829 }
 830
 831 void RenderWidgetCompositor::ApplyViewportDeltas(
 832     const gfx::Vector2d& scroll_delta,
 833     float page_scale,
 834     float top_controls_delta) {
 835   widget_->webwidget()->applyViewportDeltas(
 836       scroll_delta,
 837       page_scale,
 838       top_controls_delta);
 839 }
 840
 841 void RenderWidgetCompositor::RequestNewOutputSurface() {
 842   // If the host is closing, then no more compositing is possible.  This
 843   // prevents shutdown races between handling the close message and
 844   // the CreateOutputSurface task.
 845   if (widget_->host_closing())
 846     return;
 847
 848   // TODO(robliao): Remove ScopedTracker below once https://crbug.com/466870
 849   // is fixed.
 850   tracked_objects::ScopedTracker tracking_profile(
 851       FROM_HERE_WITH_EXPLICIT_FUNCTION(
 852           "466870 RenderWidgetCompositor::RequestNewOutputSurface"));
 853
 854   bool fallback =
 855       num_failed_recreate_attempts_ >= OUTPUT_SURFACE_RETRIES_BEFORE_FALLBACK;
 856   scoped_ptr<cc::OutputSurface> surface(widget_->CreateOutputSurface(fallback));
 857
 858   if (!surface) {
 859     DidFailToInitializeOutputSurface();
 860     return;
 861   }
 862
 863   layer_tree_host_->SetOutputSurface(surface.Pass());
 864 }
 865
 866 void RenderWidgetCompositor::DidInitializeOutputSurface() {
 867   num_failed_recreate_attempts_ = 0;
 868 }
 869
 870 void RenderWidgetCompositor::DidFailToInitializeOutputSurface() {
 871   ++num_failed_recreate_attempts_;
 872   // Tolerate a certain number of recreation failures to work around races
 873   // in the output-surface-lost machinery.
 874   LOG_IF(FATAL, (num_failed_recreate_attempts_ >= MAX_OUTPUT_SURFACE_RETRIES))
 875       << "Failed to create a fallback OutputSurface.";
 876
 877   base::MessageLoop::current()->PostTask(
 878       FROM_HERE, base::Bind(&RenderWidgetCompositor::RequestNewOutputSurface,
 879                             weak_factory_.GetWeakPtr()));
 880 }
 881
 882 void RenderWidgetCompositor::WillCommit() {
 883 }
 884
 885 void RenderWidgetCompositor::DidCommit() {
 886   DCHECK(!temporary_copy_output_request_);
 887   widget_->DidCommitCompositorFrame();
 888   widget_->didBecomeReadyForAdditionalInput();
 889   compositor_deps_->GetRendererScheduler()->DidCommitFrameToCompositor();
 890 }
 891
 892 void RenderWidgetCompositor::DidCommitAndDrawFrame() {
 893   widget_->didCommitAndDrawCompositorFrame();
 894 }
 895
 896 void RenderWidgetCompositor::DidCompleteSwapBuffers() {
 897   widget_->didCompleteSwapBuffers();
 898   bool threaded = !!compositor_deps_->GetCompositorImplThreadTaskRunner().get();
 899   if (!threaded)
 900     widget_->OnSwapBuffersComplete();
 901 }
 902
 903 void RenderWidgetCompositor::DidCompletePageScaleAnimation() {
 904   widget_->DidCompletePageScaleAnimation();
 905 }
 906
 907 void RenderWidgetCompositor::ScheduleAnimation() {
 908   widget_->scheduleAnimation();
 909 }
 910
 911 void RenderWidgetCompositor::DidPostSwapBuffers() {
 912   widget_->OnSwapBuffersPosted();
 913 }
 914
 915 void RenderWidgetCompositor::DidAbortSwapBuffers() {
 916   widget_->OnSwapBuffersAborted();
 917 }
 918
 919 void RenderWidgetCompositor::RateLimitSharedMainThreadContext() {
 920   cc::ContextProvider* provider =
 921       compositor_deps_->GetSharedMainThreadContextProvider();
 922   // provider can be NULL after the GPU process crashed enough times and we
 923   // don't want to restart it any more (falling back to software).
 924   if (!provider)
 925     return;
 926   provider->ContextGL()->RateLimitOffscreenContextCHROMIUM();
 927 }
 928
 929 }  // namespace content