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 "components/scheduler/renderer/renderer_scheduler.h"
  34 #include "content/common/content_switches_internal.h"
  35 #include "content/common/gpu/client/context_provider_command_buffer.h"
  36 #include "content/public/common/content_switches.h"
  37 #include "content/renderer/input/input_handler_manager.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/WebLayoutAndPaintAsyncCallback.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/WebSelection.h"
  45 #include "third_party/WebKit/public/web/WebWidget.h"
  46 #include "ui/gfx/frame_time.h"
  47 #include "ui/gl/gl_switches.h"
  48 #include "ui/native_theme/native_theme_switches.h"
  49
  50 #if defined(OS_ANDROID)
  51 #include "content/renderer/android/synchronous_compositor_factory.h"
  52 #include "ui/gfx/android/device_display_info.h"
  53 #endif
  54
  55 namespace base {
  56 class Value;
  57 }
  58
  59 namespace cc {
  60 class Layer;
  61 }
  62
  63 using blink::WebBeginFrameArgs;
  64 using blink::WebFloatPoint;
  65 using blink::WebRect;
  66 using blink::WebSelection;
  67 using blink::WebSize;
  68 using blink::WebTopControlsState;
  69
  70 namespace content {
  71 namespace {
  72
  73 bool GetSwitchValueAsInt(const base::CommandLine& command_line,
  74                          const std::string& switch_string,
  75                          int min_value,
  76                          int max_value,
  77                          int* result) {
  78   std::string string_value = command_line.GetSwitchValueASCII(switch_string);
  79   int int_value;
  80   if (base::StringToInt(string_value, &int_value) &&
  81       int_value >= min_value && int_value <= max_value) {
  82     *result = int_value;
  83     return true;
  84   } else {
  85     LOG(WARNING) << "Failed to parse switch " << switch_string  << ": " <<
  86         string_value;
  87     return false;
  88   }
  89 }
  90
  91 cc::LayerSelectionBound ConvertWebSelectionBound(
  92     const WebSelection& web_selection,
  93     bool is_start) {
  94   cc::LayerSelectionBound cc_bound;
  95   if (web_selection.isNone())
  96     return cc_bound;
  97
  98   const blink::WebSelectionBound& web_bound =
  99       is_start ? web_selection.start() : web_selection.end();
 100   DCHECK(web_bound.layerId);
 101   cc_bound.type = cc::SELECTION_BOUND_CENTER;
 102   if (web_selection.isRange()) {
 103     if (is_start) {
 104       cc_bound.type = web_bound.isTextDirectionRTL ? cc::SELECTION_BOUND_RIGHT
 105                                                    : cc::SELECTION_BOUND_LEFT;
 106     } else {
 107       cc_bound.type = web_bound.isTextDirectionRTL ? cc::SELECTION_BOUND_LEFT
 108                                                    : cc::SELECTION_BOUND_RIGHT;
 109     }
 110   }
 111   cc_bound.layer_id = web_bound.layerId;
 112   cc_bound.edge_top = gfx::Point(web_bound.edgeTopInLayer);
 113   cc_bound.edge_bottom = gfx::Point(web_bound.edgeBottomInLayer);
 114   return cc_bound;
 115 }
 116
 117 cc::LayerSelection ConvertWebSelection(const WebSelection& web_selection) {
 118   cc::LayerSelection cc_selection;
 119   cc_selection.start = ConvertWebSelectionBound(web_selection, true);
 120   cc_selection.end = ConvertWebSelectionBound(web_selection, false);
 121   cc_selection.is_editable = web_selection.isEditable();
 122   cc_selection.is_empty_text_form_control =
 123       web_selection.isEmptyTextFormControl();
 124   return cc_selection;
 125 }
 126
 127 gfx::Size CalculateDefaultTileSize(RenderWidget* widget) {
 128   int default_tile_size = 256;
 129 #if defined(OS_ANDROID)
 130   // TODO(epenner): unify this for all platforms if it
 131   // makes sense (http://crbug.com/159524)
 132
 133   gfx::DeviceDisplayInfo info;
 134   bool real_size_supported = true;
 135   int display_width = info.GetPhysicalDisplayWidth();
 136   int display_height = info.GetPhysicalDisplayHeight();
 137   if (display_width == 0 || display_height == 0) {
 138     real_size_supported = false;
 139     display_width = info.GetDisplayWidth();
 140     display_height = info.GetDisplayHeight();
 141   }
 142
 143   int portrait_width = std::min(display_width, display_height);
 144   int landscape_width = std::max(display_width, display_height);
 145
 146   if (real_size_supported) {
 147     // Maximum HD dimensions should be 768x1280
 148     // Maximum FHD dimensions should be 1200x1920
 149     if (portrait_width > 768 || landscape_width > 1280)
 150       default_tile_size = 384;
 151     if (portrait_width > 1200 || landscape_width > 1920)
 152       default_tile_size = 512;
 153
 154     // Adjust for some resolutions that barely straddle an extra
 155     // tile when in portrait mode. This helps worst case scroll/raster
 156     // by not needing a full extra tile for each row.
 157     if (default_tile_size == 256 && portrait_width == 768)
 158       default_tile_size += 32;
 159     if (default_tile_size == 384 && portrait_width == 1200)
 160       default_tile_size += 32;
 161   } else {
 162     // We don't know the exact resolution due to screen controls etc.
 163     // So this just estimates the values above using tile counts.
 164     int numTiles = (display_width * display_height) / (256 * 256);
 165     if (numTiles > 16)
 166       default_tile_size = 384;
 167     if (numTiles >= 40)
 168       default_tile_size = 512;
 169   }
 170 #elif defined(OS_CHROMEOS)
 171   // Use 512 for high DPI (dsf=2.0f) devices.
 172   if (widget->screen_info().deviceScaleFactor >= 2.0f)
 173     default_tile_size = 512;
 174 #endif
 175
 176   return gfx::Size(default_tile_size, default_tile_size);
 177 }
 178
 179 // Check cc::TopControlsState, and blink::WebTopControlsState
 180 // are kept in sync.
 181 static_assert(int(blink::WebTopControlsBoth) == int(cc::BOTH),
 182               "mismatching enums: BOTH");
 183 static_assert(int(blink::WebTopControlsHidden) == int(cc::HIDDEN),
 184               "mismatching enums: HIDDEN");
 185 static_assert(int(blink::WebTopControlsShown) == int(cc::SHOWN),
 186               "mismatching enums: SHOWN");
 187
 188 static cc::TopControlsState ConvertTopControlsState(
 189     WebTopControlsState state) {
 190   return static_cast<cc::TopControlsState>(state);
 191 }
 192
 193 }  // namespace
 194
 195 // static
 196 scoped_ptr<RenderWidgetCompositor> RenderWidgetCompositor::Create(
 197     RenderWidget* widget,
 198     CompositorDependencies* compositor_deps) {
 199   scoped_ptr<RenderWidgetCompositor> compositor(
 200       new RenderWidgetCompositor(widget, compositor_deps));
 201   compositor->Initialize();
 202   return compositor;
 203 }
 204
 205 RenderWidgetCompositor::RenderWidgetCompositor(
 206     RenderWidget* widget,
 207     CompositorDependencies* compositor_deps)
 208     : num_failed_recreate_attempts_(0),
 209       widget_(widget),
 210       compositor_deps_(compositor_deps),
 211       layout_and_paint_async_callback_(nullptr),
 212       weak_factory_(this) {
 213 }
 214
 215 void RenderWidgetCompositor::Initialize() {
 216   base::CommandLine* cmd = base::CommandLine::ForCurrentProcess();
 217
 218   cc::LayerTreeSettings settings;
 219
 220   // For web contents, layer transforms should scale up the contents of layers
 221   // to keep content always crisp when possible.
 222   settings.layer_transforms_should_scale_layer_contents = true;
 223
 224   settings.throttle_frame_production =
 225       !cmd->HasSwitch(switches::kDisableGpuVsync);
 226   settings.main_frame_before_activation_enabled =
 227       cmd->HasSwitch(cc::switches::kEnableMainFrameBeforeActivation) &&
 228       !cmd->HasSwitch(cc::switches::kDisableMainFrameBeforeActivation);
 229   settings.report_overscroll_only_for_scrollable_axes =
 230       !compositor_deps_->IsElasticOverscrollEnabled();
 231   settings.accelerated_animation_enabled =
 232       !cmd->HasSwitch(cc::switches::kDisableThreadedAnimation);
 233   settings.use_display_lists = cmd->HasSwitch(switches::kEnableSlimmingPaint);
 234   if (cmd->HasSwitch(switches::kEnableCompositorAnimationTimelines)) {
 235     settings.use_compositor_animation_timelines = true;
 236     blink::WebRuntimeFeatures::enableCompositorAnimationTimelines(true);
 237   }
 238
 239   settings.default_tile_size = CalculateDefaultTileSize(widget_);
 240   if (cmd->HasSwitch(switches::kDefaultTileWidth)) {
 241     int tile_width = 0;
 242     GetSwitchValueAsInt(*cmd,
 243                         switches::kDefaultTileWidth,
 244                         1,
 245                         std::numeric_limits<int>::max(),
 246                         &tile_width);
 247     settings.default_tile_size.set_width(tile_width);
 248   }
 249   if (cmd->HasSwitch(switches::kDefaultTileHeight)) {
 250     int tile_height = 0;
 251     GetSwitchValueAsInt(*cmd,
 252                         switches::kDefaultTileHeight,
 253                         1,
 254                         std::numeric_limits<int>::max(),
 255                         &tile_height);
 256     settings.default_tile_size.set_height(tile_height);
 257   }
 258
 259   int max_untiled_layer_width = settings.max_untiled_layer_size.width();
 260   if (cmd->HasSwitch(switches::kMaxUntiledLayerWidth)) {
 261     GetSwitchValueAsInt(*cmd, switches::kMaxUntiledLayerWidth, 1,
 262                         std::numeric_limits<int>::max(),
 263                         &max_untiled_layer_width);
 264   }
 265   int max_untiled_layer_height = settings.max_untiled_layer_size.height();
 266   if (cmd->HasSwitch(switches::kMaxUntiledLayerHeight)) {
 267     GetSwitchValueAsInt(*cmd, switches::kMaxUntiledLayerHeight, 1,
 268                         std::numeric_limits<int>::max(),
 269                         &max_untiled_layer_height);
 270   }
 271
 272   settings.max_untiled_layer_size = gfx::Size(max_untiled_layer_width,
 273                                            max_untiled_layer_height);
 274
 275   settings.gpu_rasterization_msaa_sample_count =
 276       compositor_deps_->GetGpuRasterizationMSAASampleCount();
 277   settings.impl_side_painting = compositor_deps_->IsImplSidePaintingEnabled();
 278   settings.gpu_rasterization_forced =
 279       compositor_deps_->IsGpuRasterizationForced();
 280   settings.gpu_rasterization_enabled =
 281       compositor_deps_->IsGpuRasterizationEnabled();
 282
 283   settings.can_use_lcd_text = compositor_deps_->IsLcdTextEnabled();
 284   settings.use_distance_field_text =
 285       compositor_deps_->IsDistanceFieldTextEnabled();
 286   settings.use_zero_copy = compositor_deps_->IsZeroCopyEnabled();
 287   settings.use_one_copy = compositor_deps_->IsOneCopyEnabled();
 288   settings.enable_elastic_overscroll =
 289       compositor_deps_->IsElasticOverscrollEnabled();
 290   settings.use_image_texture_target = compositor_deps_->GetImageTextureTarget();
 291   settings.gather_pixel_refs = compositor_deps_->IsGatherPixelRefsEnabled();
 292
 293   if (cmd->HasSwitch(cc::switches::kTopControlsShowThreshold)) {
 294       std::string top_threshold_str =
 295           cmd->GetSwitchValueASCII(cc::switches::kTopControlsShowThreshold);
 296       double show_threshold;
 297       if (base::StringToDouble(top_threshold_str, &show_threshold) &&
 298           show_threshold >= 0.f && show_threshold <= 1.f)
 299         settings.top_controls_show_threshold = show_threshold;
 300   }
 301
 302   if (cmd->HasSwitch(cc::switches::kTopControlsHideThreshold)) {
 303       std::string top_threshold_str =
 304           cmd->GetSwitchValueASCII(cc::switches::kTopControlsHideThreshold);
 305       double hide_threshold;
 306       if (base::StringToDouble(top_threshold_str, &hide_threshold) &&
 307           hide_threshold >= 0.f && hide_threshold <= 1.f)
 308         settings.top_controls_hide_threshold = hide_threshold;
 309   }
 310
 311   settings.use_pinch_virtual_viewport =
 312       cmd->HasSwitch(cc::switches::kEnablePinchVirtualViewport);
 313   settings.verify_property_trees =
 314       cmd->HasSwitch(cc::switches::kEnablePropertyTreeVerification) &&
 315       settings.impl_side_painting;
 316   settings.renderer_settings.allow_antialiasing &=
 317       !cmd->HasSwitch(cc::switches::kDisableCompositedAntialiasing);
 318   settings.single_thread_proxy_scheduler =
 319       compositor_deps_->UseSingleThreadScheduler();
 320
 321   // These flags should be mirrored by UI versions in ui/compositor/.
 322   settings.initial_debug_state.show_debug_borders =
 323       cmd->HasSwitch(cc::switches::kShowCompositedLayerBorders);
 324   settings.initial_debug_state.show_fps_counter =
 325       cmd->HasSwitch(cc::switches::kShowFPSCounter);
 326   settings.initial_debug_state.show_layer_animation_bounds_rects =
 327       cmd->HasSwitch(cc::switches::kShowLayerAnimationBounds);
 328   settings.initial_debug_state.show_paint_rects =
 329       cmd->HasSwitch(switches::kShowPaintRects);
 330   settings.initial_debug_state.show_property_changed_rects =
 331       cmd->HasSwitch(cc::switches::kShowPropertyChangedRects);
 332   settings.initial_debug_state.show_surface_damage_rects =
 333       cmd->HasSwitch(cc::switches::kShowSurfaceDamageRects);
 334   settings.initial_debug_state.show_screen_space_rects =
 335       cmd->HasSwitch(cc::switches::kShowScreenSpaceRects);
 336   settings.initial_debug_state.show_replica_screen_space_rects =
 337       cmd->HasSwitch(cc::switches::kShowReplicaScreenSpaceRects);
 338
 339   settings.initial_debug_state.SetRecordRenderingStats(
 340       cmd->HasSwitch(cc::switches::kEnableGpuBenchmarking));
 341
 342   if (cmd->HasSwitch(cc::switches::kSlowDownRasterScaleFactor)) {
 343     const int kMinSlowDownScaleFactor = 0;
 344     const int kMaxSlowDownScaleFactor = INT_MAX;
 345     GetSwitchValueAsInt(
 346         *cmd,
 347         cc::switches::kSlowDownRasterScaleFactor,
 348         kMinSlowDownScaleFactor,
 349         kMaxSlowDownScaleFactor,
 350         &settings.initial_debug_state.slow_down_raster_scale_factor);
 351   }
 352
 353   if (cmd->HasSwitch(cc::switches::kMaxUnusedResourceMemoryUsagePercentage)) {
 354     int max_unused_resource_memory_percentage;
 355     if (GetSwitchValueAsInt(
 356             *cmd,
 357             cc::switches::kMaxUnusedResourceMemoryUsagePercentage,
 358             0, 100,
 359             &max_unused_resource_memory_percentage)) {
 360       settings.max_unused_resource_memory_percentage =
 361           max_unused_resource_memory_percentage;
 362     }
 363   }
 364
 365   settings.strict_layer_property_change_checking =
 366       cmd->HasSwitch(cc::switches::kStrictLayerPropertyChangeChecking);
 367
 368 #if defined(OS_ANDROID)
 369   SynchronousCompositorFactory* synchronous_compositor_factory =
 370       SynchronousCompositorFactory::GetInstance();
 371
 372   // We can't use GPU rasterization on low-end devices, because the Ganesh
 373   // cache would consume too much memory.
 374   if (base::SysInfo::IsLowEndDevice())
 375     settings.gpu_rasterization_enabled = false;
 376   settings.using_synchronous_renderer_compositor =
 377       synchronous_compositor_factory;
 378   settings.record_full_layer = widget_->DoesRecordFullLayer();
 379   settings.report_overscroll_only_for_scrollable_axes =
 380       !synchronous_compositor_factory;
 381   settings.max_partial_texture_updates = 0;
 382   if (synchronous_compositor_factory) {
 383     // Android WebView uses system scrollbars, so make ours invisible.
 384     settings.scrollbar_animator = cc::LayerTreeSettings::NO_ANIMATOR;
 385     settings.solid_color_scrollbar_color = SK_ColorTRANSPARENT;
 386   } else {
 387     settings.scrollbar_animator = cc::LayerTreeSettings::LINEAR_FADE;
 388     settings.scrollbar_fade_delay_ms = 300;
 389     settings.scrollbar_fade_resize_delay_ms = 2000;
 390     settings.scrollbar_fade_duration_ms = 300;
 391     settings.solid_color_scrollbar_color = SkColorSetARGB(128, 128, 128, 128);
 392   }
 393   settings.renderer_settings.highp_threshold_min = 2048;
 394   // Android WebView handles root layer flings itself.
 395   settings.ignore_root_layer_flings =
 396       synchronous_compositor_factory;
 397   // Memory policy on Android WebView does not depend on whether device is
 398   // low end, so always use default policy.
 399   bool use_low_memory_policy =
 400       base::SysInfo::IsLowEndDevice() && !synchronous_compositor_factory;
 401   // RGBA_4444 textures are only enabled for low end devices
 402   // and are disabled for Android WebView as it doesn't support the format.
 403   settings.renderer_settings.use_rgba_4444_textures = use_low_memory_policy;
 404   if (use_low_memory_policy) {
 405     // On low-end we want to be very carefull about killing other
 406     // apps. So initially we use 50% more memory to avoid flickering
 407     // or raster-on-demand.
 408     settings.max_memory_for_prepaint_percentage = 67;
 409   } else {
 410     // On other devices we have increased memory excessively to avoid
 411     // raster-on-demand already, so now we reserve 50% _only_ to avoid
 412     // raster-on-demand, and use 50% of the memory otherwise.
 413     settings.max_memory_for_prepaint_percentage = 50;
 414   }
 415   // Webview does not own the surface so should not clear it.
 416   settings.renderer_settings.should_clear_root_render_pass =
 417       !synchronous_compositor_factory;
 418
 419   // TODO(danakj): Only do this on low end devices.
 420   settings.create_low_res_tiling = true;
 421
 422   settings.use_external_begin_frame_source = true;
 423
 424 #elif !defined(OS_MACOSX)
 425   if (ui::IsOverlayScrollbarEnabled()) {
 426     settings.scrollbar_animator = cc::LayerTreeSettings::THINNING;
 427     settings.solid_color_scrollbar_color = SkColorSetARGB(128, 128, 128, 128);
 428   } else if (settings.use_pinch_virtual_viewport) {
 429     settings.scrollbar_animator = cc::LayerTreeSettings::LINEAR_FADE;
 430     settings.solid_color_scrollbar_color = SkColorSetARGB(128, 128, 128, 128);
 431   }
 432   settings.scrollbar_fade_delay_ms = 500;
 433   settings.scrollbar_fade_resize_delay_ms = 500;
 434   settings.scrollbar_fade_duration_ms = 300;
 435
 436   // When pinching in, only show the pinch-viewport overlay scrollbars if the
 437   // page scale is at least some threshold away from the minimum. i.e. don't
 438   // show the pinch scrollbars when at minimum scale.
 439   settings.scrollbar_show_scale_threshold = 1.05f;
 440 #endif
 441
 442   if (cmd->HasSwitch(switches::kEnableLowResTiling))
 443     settings.create_low_res_tiling = true;
 444   if (cmd->HasSwitch(switches::kDisableLowResTiling))
 445     settings.create_low_res_tiling = false;
 446   if (cmd->HasSwitch(switches::kEnableBeginFrameScheduling))
 447     settings.use_external_begin_frame_source = true;
 448
 449   if (widget_->for_oopif()) {
 450     // TODO(simonhong): Apply BeginFrame scheduling for OOPIF.
 451     // See crbug.com/471411.
 452     settings.use_external_begin_frame_source = false;
 453   }
 454
 455   scoped_refptr<base::SingleThreadTaskRunner> compositor_thread_task_runner =
 456       compositor_deps_->GetCompositorImplThreadTaskRunner();
 457   scoped_refptr<base::SingleThreadTaskRunner>
 458       main_thread_compositor_task_runner =
 459           compositor_deps_->GetCompositorMainThreadTaskRunner();
 460   cc::SharedBitmapManager* shared_bitmap_manager =
 461       compositor_deps_->GetSharedBitmapManager();
 462   gpu::GpuMemoryBufferManager* gpu_memory_buffer_manager =
 463       compositor_deps_->GetGpuMemoryBufferManager();
 464   cc::TaskGraphRunner* task_graph_runner =
 465       compositor_deps_->GetTaskGraphRunner();
 466
 467   scoped_ptr<cc::BeginFrameSource> external_begin_frame_source;
 468   if (settings.use_external_begin_frame_source) {
 469     external_begin_frame_source =
 470         compositor_deps_->CreateExternalBeginFrameSource(widget_->routing_id());
 471   }
 472
 473   cc::LayerTreeHost::InitParams params;
 474   params.client = this;
 475   params.shared_bitmap_manager = shared_bitmap_manager;
 476   params.gpu_memory_buffer_manager = gpu_memory_buffer_manager;
 477   params.settings = &settings;
 478   params.task_graph_runner = task_graph_runner;
 479   params.main_task_runner = main_thread_compositor_task_runner;
 480   params.external_begin_frame_source = external_begin_frame_source.Pass();
 481   if (compositor_thread_task_runner.get()) {
 482     layer_tree_host_ = cc::LayerTreeHost::CreateThreaded(
 483         compositor_thread_task_runner, &params);
 484   } else {
 485     layer_tree_host_ = cc::LayerTreeHost::CreateSingleThreaded(this, &params);
 486   }
 487   DCHECK(layer_tree_host_);
 488 }
 489
 490 RenderWidgetCompositor::~RenderWidgetCompositor() {}
 491
 492 const base::WeakPtr<cc::InputHandler>&
 493 RenderWidgetCompositor::GetInputHandler() {
 494   return layer_tree_host_->GetInputHandler();
 495 }
 496
 497 bool RenderWidgetCompositor::BeginMainFrameRequested() const {
 498   return layer_tree_host_->BeginMainFrameRequested();
 499 }
 500
 501 void RenderWidgetCompositor::SetNeedsDisplayOnAllLayers() {
 502   layer_tree_host_->SetNeedsDisplayOnAllLayers();
 503 }
 504
 505 void RenderWidgetCompositor::SetRasterizeOnlyVisibleContent() {
 506   cc::LayerTreeDebugState current = layer_tree_host_->debug_state();
 507   current.rasterize_only_visible_content = true;
 508   layer_tree_host_->SetDebugState(current);
 509 }
 510
 511 void RenderWidgetCompositor::SetNeedsRedrawRect(gfx::Rect damage_rect) {
 512   layer_tree_host_->SetNeedsRedrawRect(damage_rect);
 513 }
 514
 515 void RenderWidgetCompositor::SetNeedsForcedRedraw() {
 516   layer_tree_host_->SetNextCommitForcesRedraw();
 517   setNeedsAnimate();
 518 }
 519
 520 scoped_ptr<cc::SwapPromiseMonitor>
 521 RenderWidgetCompositor::CreateLatencyInfoSwapPromiseMonitor(
 522     ui::LatencyInfo* latency) {
 523   return scoped_ptr<cc::SwapPromiseMonitor>(
 524       new cc::LatencyInfoSwapPromiseMonitor(
 525           latency, layer_tree_host_.get(), NULL));
 526 }
 527
 528 void RenderWidgetCompositor::QueueSwapPromise(
 529     scoped_ptr<cc::SwapPromise> swap_promise) {
 530   layer_tree_host_->QueueSwapPromise(swap_promise.Pass());
 531 }
 532
 533 int RenderWidgetCompositor::GetSourceFrameNumber() const {
 534   return layer_tree_host_->source_frame_number();
 535 }
 536
 537 void RenderWidgetCompositor::SetNeedsUpdateLayers() {
 538   layer_tree_host_->SetNeedsUpdateLayers();
 539 }
 540
 541 void RenderWidgetCompositor::SetNeedsCommit() {
 542   layer_tree_host_->SetNeedsCommit();
 543 }
 544
 545 void RenderWidgetCompositor::NotifyInputThrottledUntilCommit() {
 546   layer_tree_host_->NotifyInputThrottledUntilCommit();
 547 }
 548
 549 const cc::Layer* RenderWidgetCompositor::GetRootLayer() const {
 550   return layer_tree_host_->root_layer();
 551 }
 552
 553 int RenderWidgetCompositor::ScheduleMicroBenchmark(
 554     const std::string& name,
 555     scoped_ptr<base::Value> value,
 556     const base::Callback<void(scoped_ptr<base::Value>)>& callback) {
 557   return layer_tree_host_->ScheduleMicroBenchmark(name, value.Pass(), callback);
 558 }
 559
 560 bool RenderWidgetCompositor::SendMessageToMicroBenchmark(
 561     int id,
 562     scoped_ptr<base::Value> value) {
 563   return layer_tree_host_->SendMessageToMicroBenchmark(id, value.Pass());
 564 }
 565
 566 void RenderWidgetCompositor::StartCompositor() {
 567   layer_tree_host_->SetLayerTreeHostClientReady();
 568 }
 569
 570 void RenderWidgetCompositor::setRootLayer(const blink::WebLayer& layer) {
 571   layer_tree_host_->SetRootLayer(
 572       static_cast<const cc_blink::WebLayerImpl*>(&layer)->layer());
 573 }
 574
 575 void RenderWidgetCompositor::clearRootLayer() {
 576   layer_tree_host_->SetRootLayer(scoped_refptr<cc::Layer>());
 577 }
 578
 579 void RenderWidgetCompositor::setViewportSize(
 580     const WebSize&,
 581     const WebSize& device_viewport_size) {
 582   layer_tree_host_->SetViewportSize(device_viewport_size);
 583 }
 584
 585 void RenderWidgetCompositor::setViewportSize(
 586     const WebSize& device_viewport_size) {
 587   layer_tree_host_->SetViewportSize(device_viewport_size);
 588 }
 589
 590 WebSize RenderWidgetCompositor::layoutViewportSize() const {
 591   return layer_tree_host_->device_viewport_size();
 592 }
 593
 594 WebSize RenderWidgetCompositor::deviceViewportSize() const {
 595   return layer_tree_host_->device_viewport_size();
 596 }
 597
 598 WebFloatPoint RenderWidgetCompositor::adjustEventPointForPinchZoom(
 599     const WebFloatPoint& point) const {
 600   return point;
 601 }
 602
 603 void RenderWidgetCompositor::setDeviceScaleFactor(float device_scale) {
 604   layer_tree_host_->SetDeviceScaleFactor(device_scale);
 605 }
 606
 607 float RenderWidgetCompositor::deviceScaleFactor() const {
 608   return layer_tree_host_->device_scale_factor();
 609 }
 610
 611 void RenderWidgetCompositor::setBackgroundColor(blink::WebColor color) {
 612   layer_tree_host_->set_background_color(color);
 613 }
 614
 615 void RenderWidgetCompositor::setHasTransparentBackground(bool transparent) {
 616   layer_tree_host_->set_has_transparent_background(transparent);
 617 }
 618
 619 void RenderWidgetCompositor::setVisible(bool visible) {
 620   layer_tree_host_->SetVisible(visible);
 621 }
 622
 623 void RenderWidgetCompositor::setPageScaleFactorAndLimits(
 624     float page_scale_factor, float minimum, float maximum) {
 625   layer_tree_host_->SetPageScaleFactorAndLimits(
 626       page_scale_factor, minimum, maximum);
 627 }
 628
 629 void RenderWidgetCompositor::startPageScaleAnimation(
 630     const blink::WebPoint& destination,
 631     bool use_anchor,
 632     float new_page_scale,
 633     double duration_sec) {
 634   base::TimeDelta duration = base::TimeDelta::FromMicroseconds(
 635       duration_sec * base::Time::kMicrosecondsPerSecond);
 636   layer_tree_host_->StartPageScaleAnimation(
 637       gfx::Vector2d(destination.x, destination.y),
 638       use_anchor,
 639       new_page_scale,
 640       duration);
 641 }
 642
 643 void RenderWidgetCompositor::heuristicsForGpuRasterizationUpdated(
 644     bool matches_heuristics) {
 645   layer_tree_host_->SetHasGpuRasterizationTrigger(matches_heuristics);
 646 }
 647
 648 void RenderWidgetCompositor::setNeedsAnimate() {
 649   layer_tree_host_->SetNeedsAnimate();
 650 }
 651
 652 bool RenderWidgetCompositor::commitRequested() const {
 653   return layer_tree_host_->CommitRequested();
 654 }
 655
 656 void RenderWidgetCompositor::didStopFlinging() {
 657   layer_tree_host_->DidStopFlinging();
 658 }
 659
 660 void RenderWidgetCompositor::registerForAnimations(blink::WebLayer* layer) {
 661   cc::Layer* cc_layer = static_cast<cc_blink::WebLayerImpl*>(layer)->layer();
 662   cc_layer->layer_animation_controller()->SetAnimationRegistrar(
 663       layer_tree_host_->animation_registrar());
 664 }
 665
 666 void RenderWidgetCompositor::registerViewportLayers(
 667     const blink::WebLayer* overscrollElasticityLayer,
 668     const blink::WebLayer* pageScaleLayer,
 669     const blink::WebLayer* innerViewportScrollLayer,
 670     const blink::WebLayer* outerViewportScrollLayer) {
 671   layer_tree_host_->RegisterViewportLayers(
 672       // The scroll elasticity layer will only exist when using pinch virtual
 673       // viewports.
 674       overscrollElasticityLayer
 675           ? static_cast<const cc_blink::WebLayerImpl*>(
 676                 overscrollElasticityLayer)->layer()
 677           : NULL,
 678       static_cast<const cc_blink::WebLayerImpl*>(pageScaleLayer)->layer(),
 679       static_cast<const cc_blink::WebLayerImpl*>(innerViewportScrollLayer)
 680           ->layer(),
 681       // The outer viewport layer will only exist when using pinch virtual
 682       // viewports.
 683       outerViewportScrollLayer
 684           ? static_cast<const cc_blink::WebLayerImpl*>(outerViewportScrollLayer)
 685                 ->layer()
 686           : NULL);
 687 }
 688
 689 void RenderWidgetCompositor::clearViewportLayers() {
 690   layer_tree_host_->RegisterViewportLayers(
 691       scoped_refptr<cc::Layer>(), scoped_refptr<cc::Layer>(),
 692       scoped_refptr<cc::Layer>(), scoped_refptr<cc::Layer>());
 693 }
 694
 695 void RenderWidgetCompositor::registerSelection(
 696     const blink::WebSelection& selection) {
 697   layer_tree_host_->RegisterSelection(ConvertWebSelection(selection));
 698 }
 699
 700 void RenderWidgetCompositor::clearSelection() {
 701   cc::LayerSelection empty_selection;
 702   layer_tree_host_->RegisterSelection(empty_selection);
 703 }
 704
 705 void CompositeAndReadbackAsyncCallback(
 706     blink::WebCompositeAndReadbackAsyncCallback* callback,
 707     scoped_ptr<cc::CopyOutputResult> result) {
 708   if (result->HasBitmap()) {
 709     scoped_ptr<SkBitmap> result_bitmap = result->TakeBitmap();
 710     callback->didCompositeAndReadback(*result_bitmap);
 711   } else {
 712     callback->didCompositeAndReadback(SkBitmap());
 713   }
 714 }
 715
 716 void RenderWidgetCompositor::layoutAndPaintAsync(
 717     blink::WebLayoutAndPaintAsyncCallback* callback) {
 718   DCHECK(!temporary_copy_output_request_ && !layout_and_paint_async_callback_);
 719   layout_and_paint_async_callback_ = callback;
 720   ScheduleCommit();
 721 }
 722
 723 void RenderWidgetCompositor::compositeAndReadbackAsync(
 724     blink::WebCompositeAndReadbackAsyncCallback* callback) {
 725   DCHECK(!temporary_copy_output_request_ && !layout_and_paint_async_callback_);
 726   temporary_copy_output_request_ =
 727       cc::CopyOutputRequest::CreateBitmapRequest(
 728           base::Bind(&CompositeAndReadbackAsyncCallback, callback));
 729   // Force a commit to happen. The temporary copy output request will
 730   // be installed after layout which will happen as a part of the commit, for
 731   // widgets that delay the creation of their output surface.
 732   ScheduleCommit();
 733 }
 734
 735 bool RenderWidgetCompositor::CommitIsSynchronous() const {
 736   return !compositor_deps_->GetCompositorImplThreadTaskRunner().get() &&
 737          !layer_tree_host_->settings().single_thread_proxy_scheduler;
 738 }
 739
 740 void RenderWidgetCompositor::ScheduleCommit() {
 741   if (CommitIsSynchronous()) {
 742     base::MessageLoop::current()->PostTask(
 743         FROM_HERE, base::Bind(&RenderWidgetCompositor::SynchronousCommit,
 744                               weak_factory_.GetWeakPtr()));
 745   } else {
 746     layer_tree_host_->SetNeedsCommit();
 747   }
 748 }
 749
 750 void RenderWidgetCompositor::SynchronousCommit() {
 751   DCHECK(CommitIsSynchronous());
 752   layer_tree_host_->Composite(gfx::FrameTime::Now());
 753 }
 754
 755 void RenderWidgetCompositor::finishAllRendering() {
 756   layer_tree_host_->FinishAllRendering();
 757 }
 758
 759 void RenderWidgetCompositor::setDeferCommits(bool defer_commits) {
 760   layer_tree_host_->SetDeferCommits(defer_commits);
 761 }
 762
 763 int RenderWidgetCompositor::layerTreeId() const {
 764   return layer_tree_host_->id();
 765 }
 766
 767 void RenderWidgetCompositor::setShowFPSCounter(bool show) {
 768   cc::LayerTreeDebugState debug_state = layer_tree_host_->debug_state();
 769   debug_state.show_fps_counter = show;
 770   layer_tree_host_->SetDebugState(debug_state);
 771 }
 772
 773 void RenderWidgetCompositor::setShowPaintRects(bool show) {
 774   cc::LayerTreeDebugState debug_state = layer_tree_host_->debug_state();
 775   debug_state.show_paint_rects = show;
 776   layer_tree_host_->SetDebugState(debug_state);
 777 }
 778
 779 void RenderWidgetCompositor::setShowDebugBorders(bool show) {
 780   cc::LayerTreeDebugState debug_state = layer_tree_host_->debug_state();
 781   debug_state.show_debug_borders = show;
 782   layer_tree_host_->SetDebugState(debug_state);
 783 }
 784
 785 void RenderWidgetCompositor::setContinuousPaintingEnabled(bool enabled) {
 786   cc::LayerTreeDebugState debug_state = layer_tree_host_->debug_state();
 787   debug_state.continuous_painting = enabled;
 788   layer_tree_host_->SetDebugState(debug_state);
 789 }
 790
 791 void RenderWidgetCompositor::setShowScrollBottleneckRects(bool show) {
 792   cc::LayerTreeDebugState debug_state = layer_tree_host_->debug_state();
 793   debug_state.show_touch_event_handler_rects = show;
 794   debug_state.show_wheel_event_handler_rects = show;
 795   debug_state.show_non_fast_scrollable_rects = show;
 796   layer_tree_host_->SetDebugState(debug_state);
 797 }
 798
 799 void RenderWidgetCompositor::updateTopControlsState(
 800     WebTopControlsState constraints,
 801     WebTopControlsState current,
 802     bool animate) {
 803   layer_tree_host_->UpdateTopControlsState(ConvertTopControlsState(constraints),
 804                                            ConvertTopControlsState(current),
 805                                            animate);
 806 }
 807
 808 void RenderWidgetCompositor::setTopControlsHeight(float height, bool shrink) {
 809     layer_tree_host_->SetTopControlsHeight(height, shrink);
 810 }
 811
 812 void RenderWidgetCompositor::setTopControlsShownRatio(float ratio) {
 813   layer_tree_host_->SetTopControlsShownRatio(ratio);
 814 }
 815
 816 void RenderWidgetCompositor::WillBeginMainFrame() {
 817   widget_->willBeginCompositorFrame();
 818 }
 819
 820 void RenderWidgetCompositor::DidBeginMainFrame() {
 821 }
 822
 823 void RenderWidgetCompositor::BeginMainFrame(const cc::BeginFrameArgs& args) {
 824   double frame_time_sec = (args.frame_time - base::TimeTicks()).InSecondsF();
 825   double deadline_sec = (args.deadline - base::TimeTicks()).InSecondsF();
 826   double interval_sec = args.interval.InSecondsF();
 827   WebBeginFrameArgs web_begin_frame_args =
 828       WebBeginFrameArgs(frame_time_sec, deadline_sec, interval_sec);
 829   compositor_deps_->GetRendererScheduler()->WillBeginFrame(args);
 830   widget_->webwidget()->beginFrame(web_begin_frame_args);
 831 }
 832
 833 void RenderWidgetCompositor::BeginMainFrameNotExpectedSoon() {
 834   compositor_deps_->GetRendererScheduler()->BeginFrameNotExpectedSoon();
 835 }
 836
 837 void RenderWidgetCompositor::Layout() {
 838   widget_->webwidget()->layout();
 839
 840   if (temporary_copy_output_request_) {
 841     // For WebViewImpl, this will always have a root layer.  For other widgets,
 842     // the widget may be closed before servicing this request, so ignore it.
 843     if (cc::Layer* root_layer = layer_tree_host_->root_layer()) {
 844       root_layer->RequestCopyOfOutput(temporary_copy_output_request_.Pass());
 845     } else {
 846       temporary_copy_output_request_->SendEmptyResult();
 847       temporary_copy_output_request_ = nullptr;
 848     }
 849   }
 850 }
 851
 852 void RenderWidgetCompositor::ApplyViewportDeltas(
 853     const gfx::Vector2dF& inner_delta,
 854     const gfx::Vector2dF& outer_delta,
 855     const gfx::Vector2dF& elastic_overscroll_delta,
 856     float page_scale,
 857     float top_controls_delta) {
 858   widget_->webwidget()->applyViewportDeltas(
 859       inner_delta,
 860       outer_delta,
 861       elastic_overscroll_delta,
 862       page_scale,
 863       top_controls_delta);
 864 }
 865
 866 void RenderWidgetCompositor::ApplyViewportDeltas(
 867     const gfx::Vector2d& scroll_delta,
 868     float page_scale,
 869     float top_controls_delta) {
 870   widget_->webwidget()->applyViewportDeltas(
 871       scroll_delta,
 872       page_scale,
 873       top_controls_delta);
 874 }
 875
 876 void RenderWidgetCompositor::RequestNewOutputSurface() {
 877   // If the host is closing, then no more compositing is possible.  This
 878   // prevents shutdown races between handling the close message and
 879   // the CreateOutputSurface task.
 880   if (widget_->host_closing())
 881     return;
 882
 883   // TODO(robliao): Remove ScopedTracker below once https://crbug.com/466870
 884   // is fixed.
 885   tracked_objects::ScopedTracker tracking_profile(
 886       FROM_HERE_WITH_EXPLICIT_FUNCTION(
 887           "466870 RenderWidgetCompositor::RequestNewOutputSurface"));
 888
 889   bool fallback =
 890       num_failed_recreate_attempts_ >= OUTPUT_SURFACE_RETRIES_BEFORE_FALLBACK;
 891   scoped_ptr<cc::OutputSurface> surface(widget_->CreateOutputSurface(fallback));
 892
 893   if (!surface) {
 894     DidFailToInitializeOutputSurface();
 895     return;
 896   }
 897
 898   layer_tree_host_->SetOutputSurface(surface.Pass());
 899 }
 900
 901 void RenderWidgetCompositor::DidInitializeOutputSurface() {
 902   num_failed_recreate_attempts_ = 0;
 903 }
 904
 905 void RenderWidgetCompositor::DidFailToInitializeOutputSurface() {
 906   ++num_failed_recreate_attempts_;
 907   // Tolerate a certain number of recreation failures to work around races
 908   // in the output-surface-lost machinery.
 909   LOG_IF(FATAL, (num_failed_recreate_attempts_ >= MAX_OUTPUT_SURFACE_RETRIES))
 910       << "Failed to create a fallback OutputSurface.";
 911
 912   base::MessageLoop::current()->PostTask(
 913       FROM_HERE, base::Bind(&RenderWidgetCompositor::RequestNewOutputSurface,
 914                             weak_factory_.GetWeakPtr()));
 915 }
 916
 917 void RenderWidgetCompositor::WillCommit() {
 918   if (!layout_and_paint_async_callback_)
 919     return;
 920   layout_and_paint_async_callback_->didLayoutAndPaint();
 921   layout_and_paint_async_callback_ = nullptr;
 922 }
 923
 924 void RenderWidgetCompositor::DidCommit() {
 925   DCHECK(!temporary_copy_output_request_);
 926   widget_->DidCommitCompositorFrame();
 927   widget_->didBecomeReadyForAdditionalInput();
 928   compositor_deps_->GetRendererScheduler()->DidCommitFrameToCompositor();
 929 }
 930
 931 void RenderWidgetCompositor::DidCommitAndDrawFrame() {
 932   widget_->didCommitAndDrawCompositorFrame();
 933 }
 934
 935 void RenderWidgetCompositor::DidCompleteSwapBuffers() {
 936   widget_->didCompleteSwapBuffers();
 937   bool threaded = !!compositor_deps_->GetCompositorImplThreadTaskRunner().get();
 938   if (!threaded)
 939     widget_->OnSwapBuffersComplete();
 940 }
 941
 942 void RenderWidgetCompositor::DidCompletePageScaleAnimation() {
 943   widget_->DidCompletePageScaleAnimation();
 944 }
 945
 946 void RenderWidgetCompositor::ScheduleAnimation() {
 947   widget_->scheduleAnimation();
 948 }
 949
 950 void RenderWidgetCompositor::DidPostSwapBuffers() {
 951   widget_->OnSwapBuffersPosted();
 952 }
 953
 954 void RenderWidgetCompositor::DidAbortSwapBuffers() {
 955   widget_->OnSwapBuffersAborted();
 956 }
 957
 958 void RenderWidgetCompositor::RateLimitSharedMainThreadContext() {
 959   cc::ContextProvider* provider =
 960       compositor_deps_->GetSharedMainThreadContextProvider();
 961   // provider can be NULL after the GPU process crashed enough times and we
 962   // don't want to restart it any more (falling back to software).
 963   if (!provider)
 964     return;
 965   provider->ContextGL()->RateLimitOffscreenContextCHROMIUM();
 966 }
 967
 968 void RenderWidgetCompositor::SetSurfaceIdNamespace(
 969     uint32_t surface_id_namespace) {
 970   layer_tree_host_->set_surface_id_namespace(surface_id_namespace);
 971 }
 972
 973 }  // namespace content