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/location.h"
  12 #include "base/logging.h"
  13 #include "base/metrics/field_trial.h"
  14 #include "base/single_thread_task_runner.h"
  15 #include "base/strings/string_number_conversions.h"
  16 #include "base/synchronization/lock.h"
  17 #include "base/sys_info.h"
  18 #include "base/thread_task_runner_handle.h"
  19 #include "base/time/time.h"
  20 #include "base/values.h"
  21 #include "cc/animation/animation_host.h"
  22 #include "cc/animation/animation_timeline.h"
  23 #include "cc/base/switches.h"
  24 #include "cc/blink/web_compositor_animation_timeline_impl.h"
  25 #include "cc/blink/web_layer_impl.h"
  26 #include "cc/debug/layer_tree_debug_state.h"
  27 #include "cc/debug/micro_benchmark.h"
  28 #include "cc/input/layer_selection_bound.h"
  29 #include "cc/layers/layer.h"
  30 #include "cc/output/begin_frame_args.h"
  31 #include "cc/output/copy_output_request.h"
  32 #include "cc/output/copy_output_result.h"
  33 #include "cc/output/latency_info_swap_promise.h"
  34 #include "cc/output/swap_promise.h"
  35 #include "cc/resources/single_release_callback.h"
  36 #include "cc/scheduler/begin_frame_source.h"
  37 #include "cc/trees/latency_info_swap_promise_monitor.h"
  38 #include "cc/trees/layer_tree_host.h"
  39 #include "components/scheduler/renderer/renderer_scheduler.h"
  40 #include "content/common/content_switches_internal.h"
  41 #include "content/common/gpu/client/context_provider_command_buffer.h"
  42 #include "content/public/common/content_switches.h"
  43 #include "content/renderer/input/input_handler_manager.h"
  44 #include "gpu/command_buffer/client/gles2_interface.h"
  45 #include "third_party/WebKit/public/platform/WebCompositeAndReadbackAsyncCallback.h"
  46 #include "third_party/WebKit/public/platform/WebLayoutAndPaintAsyncCallback.h"
  47 #include "third_party/WebKit/public/platform/WebSize.h"
  48 #include "third_party/WebKit/public/web/WebKit.h"
  49 #include "third_party/WebKit/public/web/WebRuntimeFeatures.h"
  50 #include "third_party/WebKit/public/web/WebSelection.h"
  51 #include "third_party/WebKit/public/web/WebWidget.h"
  52 #include "ui/gl/gl_switches.h"
  53 #include "ui/native_theme/native_theme_switches.h"
  54
  55 #if defined(OS_ANDROID)
  56 #include "base/android/build_info.h"
  57 #include "content/renderer/android/synchronous_compositor_factory.h"
  58 #include "ui/gfx/android/device_display_info.h"
  59 #endif
  60
  61 namespace base {
  62 class Value;
  63 }
  64
  65 namespace cc {
  66 class Layer;
  67 }
  68
  69 using blink::WebBeginFrameArgs;
  70 using blink::WebFloatPoint;
  71 using blink::WebRect;
  72 using blink::WebSelection;
  73 using blink::WebSize;
  74 using blink::WebTopControlsState;
  75
  76 namespace content {
  77 namespace {
  78
  79 bool GetSwitchValueAsInt(const base::CommandLine& command_line,
  80                          const std::string& switch_string,
  81                          int min_value,
  82                          int max_value,
  83                          int* result) {
  84   std::string string_value = command_line.GetSwitchValueASCII(switch_string);
  85   int int_value;
  86   if (base::StringToInt(string_value, &int_value) &&
  87       int_value >= min_value && int_value <= max_value) {
  88     *result = int_value;
  89     return true;
  90   } else {
  91     LOG(WARNING) << "Failed to parse switch " << switch_string  << ": " <<
  92         string_value;
  93     return false;
  94   }
  95 }
  96
  97 cc::LayerSelectionBound ConvertWebSelectionBound(
  98     const WebSelection& web_selection,
  99     bool is_start) {
 100   cc::LayerSelectionBound cc_bound;
 101   if (web_selection.isNone())
 102     return cc_bound;
 103
 104   const blink::WebSelectionBound& web_bound =
 105       is_start ? web_selection.start() : web_selection.end();
 106   DCHECK(web_bound.layerId);
 107   cc_bound.type = cc::SELECTION_BOUND_CENTER;
 108   if (web_selection.isRange()) {
 109     if (is_start) {
 110       cc_bound.type = web_bound.isTextDirectionRTL ? cc::SELECTION_BOUND_RIGHT
 111                                                    : cc::SELECTION_BOUND_LEFT;
 112     } else {
 113       cc_bound.type = web_bound.isTextDirectionRTL ? cc::SELECTION_BOUND_LEFT
 114                                                    : cc::SELECTION_BOUND_RIGHT;
 115     }
 116   }
 117   cc_bound.layer_id = web_bound.layerId;
 118   cc_bound.edge_top = gfx::Point(web_bound.edgeTopInLayer);
 119   cc_bound.edge_bottom = gfx::Point(web_bound.edgeBottomInLayer);
 120   return cc_bound;
 121 }
 122
 123 cc::LayerSelection ConvertWebSelection(const WebSelection& web_selection) {
 124   cc::LayerSelection cc_selection;
 125   cc_selection.start = ConvertWebSelectionBound(web_selection, true);
 126   cc_selection.end = ConvertWebSelectionBound(web_selection, false);
 127   cc_selection.is_editable = web_selection.isEditable();
 128   cc_selection.is_empty_text_form_control =
 129       web_selection.isEmptyTextFormControl();
 130   return cc_selection;
 131 }
 132
 133 gfx::Size CalculateDefaultTileSize(RenderWidget* widget) {
 134   int default_tile_size = 256;
 135 #if defined(OS_ANDROID)
 136   // TODO(epenner): unify this for all platforms if it
 137   // makes sense (http://crbug.com/159524)
 138
 139   gfx::DeviceDisplayInfo info;
 140   bool real_size_supported = true;
 141   int display_width = info.GetPhysicalDisplayWidth();
 142   int display_height = info.GetPhysicalDisplayHeight();
 143   if (display_width == 0 || display_height == 0) {
 144     real_size_supported = false;
 145     display_width = info.GetDisplayWidth();
 146     display_height = info.GetDisplayHeight();
 147   }
 148
 149   int portrait_width = std::min(display_width, display_height);
 150   int landscape_width = std::max(display_width, display_height);
 151
 152   if (real_size_supported) {
 153     // Maximum HD dimensions should be 768x1280
 154     // Maximum FHD dimensions should be 1200x1920
 155     if (portrait_width > 768 || landscape_width > 1280)
 156       default_tile_size = 384;
 157     if (portrait_width > 1200 || landscape_width > 1920)
 158       default_tile_size = 512;
 159
 160     // Adjust for some resolutions that barely straddle an extra
 161     // tile when in portrait mode. This helps worst case scroll/raster
 162     // by not needing a full extra tile for each row.
 163     if (default_tile_size == 256 && portrait_width == 768)
 164       default_tile_size += 32;
 165     if (default_tile_size == 384 && portrait_width == 1200)
 166       default_tile_size += 32;
 167   } else {
 168     // We don't know the exact resolution due to screen controls etc.
 169     // So this just estimates the values above using tile counts.
 170     int numTiles = (display_width * display_height) / (256 * 256);
 171     if (numTiles > 16)
 172       default_tile_size = 384;
 173     if (numTiles >= 40)
 174       default_tile_size = 512;
 175   }
 176 #elif defined(OS_CHROMEOS)
 177   // Use 512 for high DPI (dsf=2.0f) devices.
 178   if (widget->screen_info().deviceScaleFactor >= 2.0f)
 179     default_tile_size = 512;
 180 #endif
 181
 182   return gfx::Size(default_tile_size, default_tile_size);
 183 }
 184
 185 // Check cc::TopControlsState, and blink::WebTopControlsState
 186 // are kept in sync.
 187 static_assert(int(blink::WebTopControlsBoth) == int(cc::BOTH),
 188               "mismatching enums: BOTH");
 189 static_assert(int(blink::WebTopControlsHidden) == int(cc::HIDDEN),
 190               "mismatching enums: HIDDEN");
 191 static_assert(int(blink::WebTopControlsShown) == int(cc::SHOWN),
 192               "mismatching enums: SHOWN");
 193
 194 static cc::TopControlsState ConvertTopControlsState(
 195     WebTopControlsState state) {
 196   return static_cast<cc::TopControlsState>(state);
 197 }
 198
 199 }  // namespace
 200
 201 // static
 202 scoped_ptr<RenderWidgetCompositor> RenderWidgetCompositor::Create(
 203     RenderWidget* widget,
 204     CompositorDependencies* compositor_deps) {
 205   scoped_ptr<RenderWidgetCompositor> compositor(
 206       new RenderWidgetCompositor(widget, compositor_deps));
 207   compositor->Initialize();
 208   return compositor;
 209 }
 210
 211 RenderWidgetCompositor::RenderWidgetCompositor(
 212     RenderWidget* widget,
 213     CompositorDependencies* compositor_deps)
 214     : num_failed_recreate_attempts_(0),
 215       widget_(widget),
 216       compositor_deps_(compositor_deps),
 217       layout_and_paint_async_callback_(nullptr),
 218       weak_factory_(this) {
 219 }
 220
 221 void RenderWidgetCompositor::Initialize() {
 222   base::CommandLine* cmd = base::CommandLine::ForCurrentProcess();
 223
 224   cc::LayerTreeSettings settings;
 225
 226   // For web contents, layer transforms should scale up the contents of layers
 227   // to keep content always crisp when possible.
 228   settings.layer_transforms_should_scale_layer_contents = true;
 229
 230   if (cmd->HasSwitch(switches::kDisableGpuVsync)) {
 231     std::string display_vsync_string =
 232         cmd->GetSwitchValueASCII(switches::kDisableGpuVsync);
 233     if (display_vsync_string == "gpu") {
 234       settings.renderer_settings.disable_display_vsync = true;
 235     } else if (display_vsync_string == "beginframe") {
 236       settings.wait_for_beginframe_interval = false;
 237     } else {
 238       settings.renderer_settings.disable_display_vsync = true;
 239       settings.wait_for_beginframe_interval = false;
 240     }
 241   }
 242   settings.main_frame_before_activation_enabled =
 243       cmd->HasSwitch(cc::switches::kEnableMainFrameBeforeActivation) &&
 244       !cmd->HasSwitch(cc::switches::kDisableMainFrameBeforeActivation);
 245   settings.accelerated_animation_enabled =
 246       !cmd->HasSwitch(cc::switches::kDisableThreadedAnimation);
 247   const std::string slimming_group =
 248       base::FieldTrialList::FindFullName("SlimmingPaint");
 249   settings.use_display_lists =
 250       (cmd->HasSwitch(switches::kEnableSlimmingPaint) ||
 251       !cmd->HasSwitch(switches::kDisableSlimmingPaint)) &&
 252       (slimming_group != "DisableSlimmingPaint");
 253   if (cmd->HasSwitch(switches::kEnableCompositorAnimationTimelines)) {
 254     settings.use_compositor_animation_timelines = true;
 255     blink::WebRuntimeFeatures::enableCompositorAnimationTimelines(true);
 256   }
 257
 258   settings.default_tile_size = CalculateDefaultTileSize(widget_);
 259   if (cmd->HasSwitch(switches::kDefaultTileWidth)) {
 260     int tile_width = 0;
 261     GetSwitchValueAsInt(*cmd,
 262                         switches::kDefaultTileWidth,
 263                         1,
 264                         std::numeric_limits<int>::max(),
 265                         &tile_width);
 266     settings.default_tile_size.set_width(tile_width);
 267   }
 268   if (cmd->HasSwitch(switches::kDefaultTileHeight)) {
 269     int tile_height = 0;
 270     GetSwitchValueAsInt(*cmd,
 271                         switches::kDefaultTileHeight,
 272                         1,
 273                         std::numeric_limits<int>::max(),
 274                         &tile_height);
 275     settings.default_tile_size.set_height(tile_height);
 276   }
 277
 278   int max_untiled_layer_width = settings.max_untiled_layer_size.width();
 279   if (cmd->HasSwitch(switches::kMaxUntiledLayerWidth)) {
 280     GetSwitchValueAsInt(*cmd, switches::kMaxUntiledLayerWidth, 1,
 281                         std::numeric_limits<int>::max(),
 282                         &max_untiled_layer_width);
 283   }
 284   int max_untiled_layer_height = settings.max_untiled_layer_size.height();
 285   if (cmd->HasSwitch(switches::kMaxUntiledLayerHeight)) {
 286     GetSwitchValueAsInt(*cmd, switches::kMaxUntiledLayerHeight, 1,
 287                         std::numeric_limits<int>::max(),
 288                         &max_untiled_layer_height);
 289   }
 290
 291   settings.max_untiled_layer_size = gfx::Size(max_untiled_layer_width,
 292                                            max_untiled_layer_height);
 293
 294   settings.gpu_rasterization_msaa_sample_count =
 295       compositor_deps_->GetGpuRasterizationMSAASampleCount();
 296   settings.gpu_rasterization_forced =
 297       compositor_deps_->IsGpuRasterizationForced();
 298   settings.gpu_rasterization_enabled =
 299       compositor_deps_->IsGpuRasterizationEnabled();
 300
 301   settings.can_use_lcd_text = compositor_deps_->IsLcdTextEnabled();
 302   settings.use_distance_field_text =
 303       compositor_deps_->IsDistanceFieldTextEnabled();
 304   settings.use_zero_copy = compositor_deps_->IsZeroCopyEnabled();
 305   settings.use_one_copy = compositor_deps_->IsOneCopyEnabled();
 306   settings.enable_elastic_overscroll =
 307       compositor_deps_->IsElasticOverscrollEnabled();
 308   settings.use_image_texture_target = compositor_deps_->GetImageTextureTarget();
 309   settings.gather_pixel_refs = compositor_deps_->IsGatherPixelRefsEnabled();
 310
 311   if (cmd->HasSwitch(cc::switches::kTopControlsShowThreshold)) {
 312       std::string top_threshold_str =
 313           cmd->GetSwitchValueASCII(cc::switches::kTopControlsShowThreshold);
 314       double show_threshold;
 315       if (base::StringToDouble(top_threshold_str, &show_threshold) &&
 316           show_threshold >= 0.f && show_threshold <= 1.f)
 317         settings.top_controls_show_threshold = show_threshold;
 318   }
 319
 320   if (cmd->HasSwitch(cc::switches::kTopControlsHideThreshold)) {
 321       std::string top_threshold_str =
 322           cmd->GetSwitchValueASCII(cc::switches::kTopControlsHideThreshold);
 323       double hide_threshold;
 324       if (base::StringToDouble(top_threshold_str, &hide_threshold) &&
 325           hide_threshold >= 0.f && hide_threshold <= 1.f)
 326         settings.top_controls_hide_threshold = hide_threshold;
 327   }
 328
 329   settings.verify_property_trees =
 330       cmd->HasSwitch(cc::switches::kEnablePropertyTreeVerification);
 331   settings.renderer_settings.allow_antialiasing &=
 332       !cmd->HasSwitch(cc::switches::kDisableCompositedAntialiasing);
 333   // The means the renderer compositor has 2 possible modes:
 334   // - Threaded compositing with a scheduler.
 335   // - Single threaded compositing without a scheduler (for layout tests only).
 336   // Using the scheduler in layout tests introduces additional composite steps
 337   // that create flakiness.
 338   settings.single_thread_proxy_scheduler = false;
 339
 340   // These flags should be mirrored by UI versions in ui/compositor/.
 341   settings.initial_debug_state.show_debug_borders =
 342       cmd->HasSwitch(cc::switches::kShowCompositedLayerBorders);
 343   settings.initial_debug_state.show_fps_counter =
 344       cmd->HasSwitch(cc::switches::kShowFPSCounter);
 345   settings.initial_debug_state.show_layer_animation_bounds_rects =
 346       cmd->HasSwitch(cc::switches::kShowLayerAnimationBounds);
 347   settings.initial_debug_state.show_paint_rects =
 348       cmd->HasSwitch(switches::kShowPaintRects);
 349   settings.initial_debug_state.show_property_changed_rects =
 350       cmd->HasSwitch(cc::switches::kShowPropertyChangedRects);
 351   settings.initial_debug_state.show_surface_damage_rects =
 352       cmd->HasSwitch(cc::switches::kShowSurfaceDamageRects);
 353   settings.initial_debug_state.show_screen_space_rects =
 354       cmd->HasSwitch(cc::switches::kShowScreenSpaceRects);
 355   settings.initial_debug_state.show_replica_screen_space_rects =
 356       cmd->HasSwitch(cc::switches::kShowReplicaScreenSpaceRects);
 357
 358   settings.initial_debug_state.SetRecordRenderingStats(
 359       cmd->HasSwitch(cc::switches::kEnableGpuBenchmarking));
 360
 361   if (cmd->HasSwitch(cc::switches::kSlowDownRasterScaleFactor)) {
 362     const int kMinSlowDownScaleFactor = 0;
 363     const int kMaxSlowDownScaleFactor = INT_MAX;
 364     GetSwitchValueAsInt(
 365         *cmd,
 366         cc::switches::kSlowDownRasterScaleFactor,
 367         kMinSlowDownScaleFactor,
 368         kMaxSlowDownScaleFactor,
 369         &settings.initial_debug_state.slow_down_raster_scale_factor);
 370   }
 371
 372   settings.invert_viewport_scroll_order =
 373       cmd->HasSwitch(switches::kInvertViewportScrollOrder);
 374
 375   if (cmd->HasSwitch(cc::switches::kMaxUnusedResourceMemoryUsagePercentage)) {
 376     int max_unused_resource_memory_percentage;
 377     if (GetSwitchValueAsInt(
 378             *cmd,
 379             cc::switches::kMaxUnusedResourceMemoryUsagePercentage,
 380             0, 100,
 381             &max_unused_resource_memory_percentage)) {
 382       settings.max_unused_resource_memory_percentage =
 383           max_unused_resource_memory_percentage;
 384     }
 385   }
 386
 387   settings.strict_layer_property_change_checking =
 388       cmd->HasSwitch(cc::switches::kStrictLayerPropertyChangeChecking);
 389
 390 #if defined(OS_ANDROID)
 391   SynchronousCompositorFactory* synchronous_compositor_factory =
 392       SynchronousCompositorFactory::GetInstance();
 393
 394   // We can't use GPU rasterization on low-end devices, because the Ganesh
 395   // cache would consume too much memory.
 396   if (base::SysInfo::IsLowEndDevice())
 397     settings.gpu_rasterization_enabled = false;
 398   settings.using_synchronous_renderer_compositor =
 399       synchronous_compositor_factory;
 400   settings.record_full_layer = widget_->DoesRecordFullLayer();
 401   settings.max_partial_texture_updates = 0;
 402   if (synchronous_compositor_factory) {
 403     // Android WebView uses system scrollbars, so make ours invisible.
 404     settings.scrollbar_animator = cc::LayerTreeSettings::NO_ANIMATOR;
 405     settings.solid_color_scrollbar_color = SK_ColorTRANSPARENT;
 406   } else {
 407     settings.scrollbar_animator = cc::LayerTreeSettings::LINEAR_FADE;
 408     settings.scrollbar_fade_delay_ms = 300;
 409     settings.scrollbar_fade_resize_delay_ms = 2000;
 410     settings.scrollbar_fade_duration_ms = 300;
 411     settings.solid_color_scrollbar_color = SkColorSetARGB(128, 128, 128, 128);
 412   }
 413   settings.renderer_settings.highp_threshold_min = 2048;
 414   // Android WebView handles root layer flings itself.
 415   settings.ignore_root_layer_flings =
 416       synchronous_compositor_factory;
 417   // Memory policy on Android WebView does not depend on whether device is
 418   // low end, so always use default policy.
 419   bool use_low_memory_policy =
 420       base::SysInfo::IsLowEndDevice() && !synchronous_compositor_factory;
 421   // RGBA_4444 textures are only enabled for low end devices
 422   // and are disabled for Android WebView as it doesn't support the format.
 423   settings.renderer_settings.use_rgba_4444_textures = use_low_memory_policy;
 424   if (use_low_memory_policy) {
 425     // On low-end we want to be very carefull about killing other
 426     // apps. So initially we use 50% more memory to avoid flickering
 427     // or raster-on-demand.
 428     settings.max_memory_for_prepaint_percentage = 67;
 429   } else {
 430     // On other devices we have increased memory excessively to avoid
 431     // raster-on-demand already, so now we reserve 50% _only_ to avoid
 432     // raster-on-demand, and use 50% of the memory otherwise.
 433     settings.max_memory_for_prepaint_percentage = 50;
 434   }
 435   // Webview does not own the surface so should not clear it.
 436   settings.renderer_settings.should_clear_root_render_pass =
 437       !synchronous_compositor_factory;
 438
 439   // TODO(danakj): Only do this on low end devices.
 440   settings.create_low_res_tiling = true;
 441
 442   settings.use_external_begin_frame_source = true;
 443
 444 #elif !defined(OS_MACOSX)
 445   if (ui::IsOverlayScrollbarEnabled()) {
 446     settings.scrollbar_animator = cc::LayerTreeSettings::THINNING;
 447     settings.solid_color_scrollbar_color = SkColorSetARGB(128, 128, 128, 128);
 448   } else {
 449     settings.scrollbar_animator = cc::LayerTreeSettings::LINEAR_FADE;
 450     settings.solid_color_scrollbar_color = SkColorSetARGB(128, 128, 128, 128);
 451   }
 452   settings.scrollbar_fade_delay_ms = 500;
 453   settings.scrollbar_fade_resize_delay_ms = 500;
 454   settings.scrollbar_fade_duration_ms = 300;
 455 #endif
 456
 457   if (cmd->HasSwitch(switches::kEnableLowResTiling))
 458     settings.create_low_res_tiling = true;
 459   if (cmd->HasSwitch(switches::kDisableLowResTiling))
 460     settings.create_low_res_tiling = false;
 461   if (cmd->HasSwitch(cc::switches::kEnableBeginFrameScheduling))
 462     settings.use_external_begin_frame_source = true;
 463
 464   if (widget_->for_oopif()) {
 465     // TODO(simonhong): Apply BeginFrame scheduling for OOPIF.
 466     // See crbug.com/471411.
 467     settings.use_external_begin_frame_source = false;
 468   }
 469
 470   scoped_refptr<base::SingleThreadTaskRunner> compositor_thread_task_runner =
 471       compositor_deps_->GetCompositorImplThreadTaskRunner();
 472   scoped_refptr<base::SingleThreadTaskRunner>
 473       main_thread_compositor_task_runner =
 474           compositor_deps_->GetCompositorMainThreadTaskRunner();
 475   cc::SharedBitmapManager* shared_bitmap_manager =
 476       compositor_deps_->GetSharedBitmapManager();
 477   gpu::GpuMemoryBufferManager* gpu_memory_buffer_manager =
 478       compositor_deps_->GetGpuMemoryBufferManager();
 479   cc::TaskGraphRunner* task_graph_runner =
 480       compositor_deps_->GetTaskGraphRunner();
 481
 482   scoped_ptr<cc::BeginFrameSource> external_begin_frame_source;
 483   if (settings.use_external_begin_frame_source) {
 484     external_begin_frame_source =
 485         compositor_deps_->CreateExternalBeginFrameSource(widget_->routing_id());
 486   }
 487
 488   cc::LayerTreeHost::InitParams params;
 489   params.client = this;
 490   params.shared_bitmap_manager = shared_bitmap_manager;
 491   params.gpu_memory_buffer_manager = gpu_memory_buffer_manager;
 492   params.settings = &settings;
 493   params.task_graph_runner = task_graph_runner;
 494   params.main_task_runner = main_thread_compositor_task_runner;
 495   params.external_begin_frame_source = external_begin_frame_source.Pass();
 496   if (compositor_thread_task_runner.get()) {
 497     layer_tree_host_ = cc::LayerTreeHost::CreateThreaded(
 498         compositor_thread_task_runner, &params);
 499   } else {
 500     layer_tree_host_ = cc::LayerTreeHost::CreateSingleThreaded(this, &params);
 501   }
 502   DCHECK(layer_tree_host_);
 503 }
 504
 505 RenderWidgetCompositor::~RenderWidgetCompositor() {}
 506
 507 const base::WeakPtr<cc::InputHandler>&
 508 RenderWidgetCompositor::GetInputHandler() {
 509   return layer_tree_host_->GetInputHandler();
 510 }
 511
 512 bool RenderWidgetCompositor::BeginMainFrameRequested() const {
 513   return layer_tree_host_->BeginMainFrameRequested();
 514 }
 515
 516 void RenderWidgetCompositor::SetNeedsDisplayOnAllLayers() {
 517   layer_tree_host_->SetNeedsDisplayOnAllLayers();
 518 }
 519
 520 void RenderWidgetCompositor::SetRasterizeOnlyVisibleContent() {
 521   cc::LayerTreeDebugState current = layer_tree_host_->debug_state();
 522   current.rasterize_only_visible_content = true;
 523   layer_tree_host_->SetDebugState(current);
 524 }
 525
 526 void RenderWidgetCompositor::SetNeedsRedrawRect(gfx::Rect damage_rect) {
 527   layer_tree_host_->SetNeedsRedrawRect(damage_rect);
 528 }
 529
 530 void RenderWidgetCompositor::SetNeedsForcedRedraw() {
 531   layer_tree_host_->SetNextCommitForcesRedraw();
 532   setNeedsAnimate();
 533 }
 534
 535 scoped_ptr<cc::SwapPromiseMonitor>
 536 RenderWidgetCompositor::CreateLatencyInfoSwapPromiseMonitor(
 537     ui::LatencyInfo* latency) {
 538   return scoped_ptr<cc::SwapPromiseMonitor>(
 539       new cc::LatencyInfoSwapPromiseMonitor(
 540           latency, layer_tree_host_.get(), NULL));
 541 }
 542
 543 void RenderWidgetCompositor::QueueSwapPromise(
 544     scoped_ptr<cc::SwapPromise> swap_promise) {
 545   layer_tree_host_->QueueSwapPromise(swap_promise.Pass());
 546 }
 547
 548 int RenderWidgetCompositor::GetSourceFrameNumber() const {
 549   return layer_tree_host_->source_frame_number();
 550 }
 551
 552 void RenderWidgetCompositor::SetNeedsUpdateLayers() {
 553   layer_tree_host_->SetNeedsUpdateLayers();
 554 }
 555
 556 void RenderWidgetCompositor::SetNeedsCommit() {
 557   layer_tree_host_->SetNeedsCommit();
 558 }
 559
 560 void RenderWidgetCompositor::NotifyInputThrottledUntilCommit() {
 561   layer_tree_host_->NotifyInputThrottledUntilCommit();
 562 }
 563
 564 const cc::Layer* RenderWidgetCompositor::GetRootLayer() const {
 565   return layer_tree_host_->root_layer();
 566 }
 567
 568 int RenderWidgetCompositor::ScheduleMicroBenchmark(
 569     const std::string& name,
 570     scoped_ptr<base::Value> value,
 571     const base::Callback<void(scoped_ptr<base::Value>)>& callback) {
 572   return layer_tree_host_->ScheduleMicroBenchmark(name, value.Pass(), callback);
 573 }
 574
 575 bool RenderWidgetCompositor::SendMessageToMicroBenchmark(
 576     int id,
 577     scoped_ptr<base::Value> value) {
 578   return layer_tree_host_->SendMessageToMicroBenchmark(id, value.Pass());
 579 }
 580
 581 void RenderWidgetCompositor::StartCompositor() {
 582   layer_tree_host_->SetLayerTreeHostClientReady();
 583 }
 584
 585 void RenderWidgetCompositor::setRootLayer(const blink::WebLayer& layer) {
 586   layer_tree_host_->SetRootLayer(
 587       static_cast<const cc_blink::WebLayerImpl*>(&layer)->layer());
 588 }
 589
 590 void RenderWidgetCompositor::clearRootLayer() {
 591   layer_tree_host_->SetRootLayer(scoped_refptr<cc::Layer>());
 592 }
 593
 594 void RenderWidgetCompositor::attachCompositorAnimationTimeline(
 595     blink::WebCompositorAnimationTimeline* compositor_timeline) {
 596   DCHECK(compositor_timeline);
 597   DCHECK(layer_tree_host_->animation_host());
 598   layer_tree_host_->animation_host()->AddAnimationTimeline(
 599       static_cast<const cc_blink::WebCompositorAnimationTimelineImpl*>(
 600           compositor_timeline)->animation_timeline());
 601 }
 602
 603 void RenderWidgetCompositor::detachCompositorAnimationTimeline(
 604     blink::WebCompositorAnimationTimeline* compositor_timeline) {
 605   DCHECK(compositor_timeline);
 606   DCHECK(layer_tree_host_->animation_host());
 607   layer_tree_host_->animation_host()->RemoveAnimationTimeline(
 608       static_cast<const cc_blink::WebCompositorAnimationTimelineImpl*>(
 609           compositor_timeline)->animation_timeline());
 610 }
 611
 612 void RenderWidgetCompositor::setViewportSize(
 613     const WebSize&,
 614     const WebSize& device_viewport_size) {
 615   layer_tree_host_->SetViewportSize(device_viewport_size);
 616 }
 617
 618 void RenderWidgetCompositor::setViewportSize(
 619     const WebSize& device_viewport_size) {
 620   layer_tree_host_->SetViewportSize(device_viewport_size);
 621 }
 622
 623 WebSize RenderWidgetCompositor::layoutViewportSize() const {
 624   return layer_tree_host_->device_viewport_size();
 625 }
 626
 627 WebSize RenderWidgetCompositor::deviceViewportSize() const {
 628   return layer_tree_host_->device_viewport_size();
 629 }
 630
 631 WebFloatPoint RenderWidgetCompositor::adjustEventPointForPinchZoom(
 632     const WebFloatPoint& point) const {
 633   return point;
 634 }
 635
 636 void RenderWidgetCompositor::setDeviceScaleFactor(float device_scale) {
 637   layer_tree_host_->SetDeviceScaleFactor(device_scale);
 638 }
 639
 640 float RenderWidgetCompositor::deviceScaleFactor() const {
 641   return layer_tree_host_->device_scale_factor();
 642 }
 643
 644 void RenderWidgetCompositor::setBackgroundColor(blink::WebColor color) {
 645   layer_tree_host_->set_background_color(color);
 646 }
 647
 648 void RenderWidgetCompositor::setHasTransparentBackground(bool transparent) {
 649   layer_tree_host_->set_has_transparent_background(transparent);
 650 }
 651
 652 void RenderWidgetCompositor::setVisible(bool visible) {
 653   layer_tree_host_->SetVisible(visible);
 654 }
 655
 656 void RenderWidgetCompositor::setPageScaleFactorAndLimits(
 657     float page_scale_factor, float minimum, float maximum) {
 658   layer_tree_host_->SetPageScaleFactorAndLimits(
 659       page_scale_factor, minimum, maximum);
 660 }
 661
 662 void RenderWidgetCompositor::startPageScaleAnimation(
 663     const blink::WebPoint& destination,
 664     bool use_anchor,
 665     float new_page_scale,
 666     double duration_sec) {
 667   base::TimeDelta duration = base::TimeDelta::FromMicroseconds(
 668       duration_sec * base::Time::kMicrosecondsPerSecond);
 669   layer_tree_host_->StartPageScaleAnimation(
 670       gfx::Vector2d(destination.x, destination.y),
 671       use_anchor,
 672       new_page_scale,
 673       duration);
 674 }
 675
 676 void RenderWidgetCompositor::heuristicsForGpuRasterizationUpdated(
 677     bool matches_heuristics) {
 678   layer_tree_host_->SetHasGpuRasterizationTrigger(matches_heuristics);
 679 }
 680
 681 void RenderWidgetCompositor::setNeedsAnimate() {
 682   layer_tree_host_->SetNeedsAnimate();
 683 }
 684
 685 void RenderWidgetCompositor::didStopFlinging() {
 686   layer_tree_host_->DidStopFlinging();
 687 }
 688
 689 void RenderWidgetCompositor::registerForAnimations(blink::WebLayer* layer) {
 690   cc::Layer* cc_layer = static_cast<cc_blink::WebLayerImpl*>(layer)->layer();
 691   cc_layer->RegisterForAnimations(layer_tree_host_->animation_registrar());
 692 }
 693
 694 void RenderWidgetCompositor::registerViewportLayers(
 695     const blink::WebLayer* overscrollElasticityLayer,
 696     const blink::WebLayer* pageScaleLayer,
 697     const blink::WebLayer* innerViewportScrollLayer,
 698     const blink::WebLayer* outerViewportScrollLayer) {
 699   layer_tree_host_->RegisterViewportLayers(
 700       // TODO(bokan): This check can probably be removed now, but it looks
 701       // like overscroll elasticity may still be NULL until PinchViewport
 702       // registers its layers.
 703       // The scroll elasticity layer will only exist when using pinch virtual
 704       // viewports.
 705       overscrollElasticityLayer
 706           ? static_cast<const cc_blink::WebLayerImpl*>(
 707                 overscrollElasticityLayer)->layer()
 708           : NULL,
 709       static_cast<const cc_blink::WebLayerImpl*>(pageScaleLayer)->layer(),
 710       static_cast<const cc_blink::WebLayerImpl*>(innerViewportScrollLayer)
 711           ->layer(),
 712       // TODO(bokan): This check can probably be removed now, but it looks
 713       // like overscroll elasticity may still be NULL until PinchViewport
 714       // registers its layers.
 715       // The outer viewport layer will only exist when using pinch virtual
 716       // viewports.
 717       outerViewportScrollLayer
 718           ? static_cast<const cc_blink::WebLayerImpl*>(outerViewportScrollLayer)
 719                 ->layer()
 720           : NULL);
 721 }
 722
 723 void RenderWidgetCompositor::clearViewportLayers() {
 724   layer_tree_host_->RegisterViewportLayers(
 725       scoped_refptr<cc::Layer>(), scoped_refptr<cc::Layer>(),
 726       scoped_refptr<cc::Layer>(), scoped_refptr<cc::Layer>());
 727 }
 728
 729 void RenderWidgetCompositor::registerSelection(
 730     const blink::WebSelection& selection) {
 731   layer_tree_host_->RegisterSelection(ConvertWebSelection(selection));
 732 }
 733
 734 void RenderWidgetCompositor::clearSelection() {
 735   cc::LayerSelection empty_selection;
 736   layer_tree_host_->RegisterSelection(empty_selection);
 737 }
 738
 739 void CompositeAndReadbackAsyncCallback(
 740     blink::WebCompositeAndReadbackAsyncCallback* callback,
 741     scoped_ptr<cc::CopyOutputResult> result) {
 742   if (result->HasBitmap()) {
 743     scoped_ptr<SkBitmap> result_bitmap = result->TakeBitmap();
 744     callback->didCompositeAndReadback(*result_bitmap);
 745   } else {
 746     callback->didCompositeAndReadback(SkBitmap());
 747   }
 748 }
 749
 750 bool RenderWidgetCompositor::CompositeIsSynchronous() const {
 751   return !compositor_deps_->GetCompositorImplThreadTaskRunner().get() &&
 752          !layer_tree_host_->settings().single_thread_proxy_scheduler;
 753 }
 754
 755 void RenderWidgetCompositor::layoutAndPaintAsync(
 756     blink::WebLayoutAndPaintAsyncCallback* callback) {
 757   DCHECK(!temporary_copy_output_request_ && !layout_and_paint_async_callback_);
 758   layout_and_paint_async_callback_ = callback;
 759
 760   if (CompositeIsSynchronous()) {
 761     base::ThreadTaskRunnerHandle::Get()->PostTask(
 762         FROM_HERE, base::Bind(&RenderWidgetCompositor::LayoutAndUpdateLayers,
 763                               weak_factory_.GetWeakPtr()));
 764   } else {
 765     layer_tree_host_->SetNeedsCommit();
 766   }
 767 }
 768
 769 void RenderWidgetCompositor::LayoutAndUpdateLayers() {
 770   DCHECK(CompositeIsSynchronous());
 771   layer_tree_host_->LayoutAndUpdateLayers();
 772   InvokeLayoutAndPaintCallback();
 773 }
 774
 775 void RenderWidgetCompositor::InvokeLayoutAndPaintCallback() {
 776   if (!layout_and_paint_async_callback_)
 777     return;
 778   layout_and_paint_async_callback_->didLayoutAndPaint();
 779   layout_and_paint_async_callback_ = nullptr;
 780 }
 781
 782 void RenderWidgetCompositor::compositeAndReadbackAsync(
 783     blink::WebCompositeAndReadbackAsyncCallback* callback) {
 784   DCHECK(!temporary_copy_output_request_ && !layout_and_paint_async_callback_);
 785   temporary_copy_output_request_ =
 786       cc::CopyOutputRequest::CreateBitmapRequest(
 787           base::Bind(&CompositeAndReadbackAsyncCallback, callback));
 788
 789   // Force a commit to happen. The temporary copy output request will
 790   // be installed after layout which will happen as a part of the commit, for
 791   // widgets that delay the creation of their output surface.
 792   if (CompositeIsSynchronous()) {
 793     base::ThreadTaskRunnerHandle::Get()->PostTask(
 794         FROM_HERE, base::Bind(&RenderWidgetCompositor::SynchronouslyComposite,
 795                               weak_factory_.GetWeakPtr()));
 796   } else {
 797     layer_tree_host_->SetNeedsCommit();
 798   }
 799 }
 800
 801 void RenderWidgetCompositor::SynchronouslyComposite() {
 802   DCHECK(CompositeIsSynchronous());
 803   layer_tree_host_->Composite(base::TimeTicks::Now());
 804 }
 805
 806 void RenderWidgetCompositor::finishAllRendering() {
 807   layer_tree_host_->FinishAllRendering();
 808 }
 809
 810 void RenderWidgetCompositor::setDeferCommits(bool defer_commits) {
 811   layer_tree_host_->SetDeferCommits(defer_commits);
 812 }
 813
 814 int RenderWidgetCompositor::layerTreeId() const {
 815   return layer_tree_host_->id();
 816 }
 817
 818 void RenderWidgetCompositor::setShowFPSCounter(bool show) {
 819   cc::LayerTreeDebugState debug_state = layer_tree_host_->debug_state();
 820   debug_state.show_fps_counter = show;
 821   layer_tree_host_->SetDebugState(debug_state);
 822 }
 823
 824 void RenderWidgetCompositor::setShowPaintRects(bool show) {
 825   cc::LayerTreeDebugState debug_state = layer_tree_host_->debug_state();
 826   debug_state.show_paint_rects = show;
 827   layer_tree_host_->SetDebugState(debug_state);
 828 }
 829
 830 void RenderWidgetCompositor::setShowDebugBorders(bool show) {
 831   cc::LayerTreeDebugState debug_state = layer_tree_host_->debug_state();
 832   debug_state.show_debug_borders = show;
 833   layer_tree_host_->SetDebugState(debug_state);
 834 }
 835
 836 void RenderWidgetCompositor::setContinuousPaintingEnabled(bool enabled) {
 837   cc::LayerTreeDebugState debug_state = layer_tree_host_->debug_state();
 838   debug_state.continuous_painting = enabled;
 839   layer_tree_host_->SetDebugState(debug_state);
 840 }
 841
 842 void RenderWidgetCompositor::setShowScrollBottleneckRects(bool show) {
 843   cc::LayerTreeDebugState debug_state = layer_tree_host_->debug_state();
 844   debug_state.show_touch_event_handler_rects = show;
 845   debug_state.show_wheel_event_handler_rects = show;
 846   debug_state.show_non_fast_scrollable_rects = show;
 847   layer_tree_host_->SetDebugState(debug_state);
 848 }
 849
 850 void RenderWidgetCompositor::updateTopControlsState(
 851     WebTopControlsState constraints,
 852     WebTopControlsState current,
 853     bool animate) {
 854   layer_tree_host_->UpdateTopControlsState(ConvertTopControlsState(constraints),
 855                                            ConvertTopControlsState(current),
 856                                            animate);
 857 }
 858
 859 void RenderWidgetCompositor::setTopControlsHeight(float height, bool shrink) {
 860     layer_tree_host_->SetTopControlsHeight(height, shrink);
 861 }
 862
 863 void RenderWidgetCompositor::setTopControlsShownRatio(float ratio) {
 864   layer_tree_host_->SetTopControlsShownRatio(ratio);
 865 }
 866
 867 void RenderWidgetCompositor::setHidePinchScrollbarsNearMinScale(bool hide) {
 868   layer_tree_host_->set_hide_pinch_scrollbars_near_min_scale(hide);
 869 }
 870
 871 void RenderWidgetCompositor::WillBeginMainFrame() {
 872   widget_->WillBeginCompositorFrame();
 873 }
 874
 875 void RenderWidgetCompositor::DidBeginMainFrame() {
 876 }
 877
 878 void RenderWidgetCompositor::BeginMainFrame(const cc::BeginFrameArgs& args) {
 879   double frame_time_sec = (args.frame_time - base::TimeTicks()).InSecondsF();
 880   double deadline_sec = (args.deadline - base::TimeTicks()).InSecondsF();
 881   double interval_sec = args.interval.InSecondsF();
 882   WebBeginFrameArgs web_begin_frame_args =
 883       WebBeginFrameArgs(frame_time_sec, deadline_sec, interval_sec);
 884   compositor_deps_->GetRendererScheduler()->WillBeginFrame(args);
 885   widget_->webwidget()->beginFrame(web_begin_frame_args);
 886 }
 887
 888 void RenderWidgetCompositor::BeginMainFrameNotExpectedSoon() {
 889   compositor_deps_->GetRendererScheduler()->BeginFrameNotExpectedSoon();
 890 }
 891
 892 void RenderWidgetCompositor::Layout() {
 893   widget_->webwidget()->layout();
 894
 895   if (temporary_copy_output_request_) {
 896     // For WebViewImpl, this will always have a root layer.  For other widgets,
 897     // the widget may be closed before servicing this request, so ignore it.
 898     if (cc::Layer* root_layer = layer_tree_host_->root_layer()) {
 899       root_layer->RequestCopyOfOutput(temporary_copy_output_request_.Pass());
 900     } else {
 901       temporary_copy_output_request_->SendEmptyResult();
 902       temporary_copy_output_request_ = nullptr;
 903     }
 904   }
 905 }
 906
 907 void RenderWidgetCompositor::ApplyViewportDeltas(
 908     const gfx::Vector2dF& inner_delta,
 909     const gfx::Vector2dF& outer_delta,
 910     const gfx::Vector2dF& elastic_overscroll_delta,
 911     float page_scale,
 912     float top_controls_delta) {
 913   widget_->webwidget()->applyViewportDeltas(
 914       inner_delta,
 915       outer_delta,
 916       elastic_overscroll_delta,
 917       page_scale,
 918       top_controls_delta);
 919 }
 920
 921 void RenderWidgetCompositor::RequestNewOutputSurface() {
 922   // If the host is closing, then no more compositing is possible.  This
 923   // prevents shutdown races between handling the close message and
 924   // the CreateOutputSurface task.
 925   if (widget_->host_closing())
 926     return;
 927
 928   bool fallback =
 929       num_failed_recreate_attempts_ >= OUTPUT_SURFACE_RETRIES_BEFORE_FALLBACK;
 930   scoped_ptr<cc::OutputSurface> surface(widget_->CreateOutputSurface(fallback));
 931
 932   if (!surface) {
 933     DidFailToInitializeOutputSurface();
 934     return;
 935   }
 936
 937   DCHECK_EQ(surface->capabilities().max_frames_pending, 1);
 938
 939   layer_tree_host_->SetOutputSurface(surface.Pass());
 940 }
 941
 942 void RenderWidgetCompositor::DidInitializeOutputSurface() {
 943   num_failed_recreate_attempts_ = 0;
 944 }
 945
 946 void RenderWidgetCompositor::DidFailToInitializeOutputSurface() {
 947   ++num_failed_recreate_attempts_;
 948   // Tolerate a certain number of recreation failures to work around races
 949   // in the output-surface-lost machinery.
 950   LOG_IF(FATAL, (num_failed_recreate_attempts_ >= MAX_OUTPUT_SURFACE_RETRIES))
 951       << "Failed to create a fallback OutputSurface.";
 952
 953   base::ThreadTaskRunnerHandle::Get()->PostTask(
 954       FROM_HERE, base::Bind(&RenderWidgetCompositor::RequestNewOutputSurface,
 955                             weak_factory_.GetWeakPtr()));
 956 }
 957
 958 void RenderWidgetCompositor::WillCommit() {
 959   InvokeLayoutAndPaintCallback();
 960 }
 961
 962 void RenderWidgetCompositor::DidCommit() {
 963   DCHECK(!temporary_copy_output_request_);
 964   widget_->DidCommitCompositorFrame();
 965   compositor_deps_->GetRendererScheduler()->DidCommitFrameToCompositor();
 966 }
 967
 968 void RenderWidgetCompositor::DidCommitAndDrawFrame() {
 969   widget_->DidCommitAndDrawCompositorFrame();
 970 }
 971
 972 void RenderWidgetCompositor::DidCompleteSwapBuffers() {
 973   widget_->DidCompleteSwapBuffers();
 974   bool threaded = !!compositor_deps_->GetCompositorImplThreadTaskRunner().get();
 975   if (!threaded)
 976     widget_->OnSwapBuffersComplete();
 977 }
 978
 979 void RenderWidgetCompositor::DidCompletePageScaleAnimation() {
 980   widget_->DidCompletePageScaleAnimation();
 981 }
 982
 983 void RenderWidgetCompositor::ScheduleAnimation() {
 984   widget_->scheduleAnimation();
 985 }
 986
 987 void RenderWidgetCompositor::DidPostSwapBuffers() {
 988   widget_->OnSwapBuffersPosted();
 989 }
 990
 991 void RenderWidgetCompositor::DidAbortSwapBuffers() {
 992   widget_->OnSwapBuffersAborted();
 993 }
 994
 995 void RenderWidgetCompositor::RecordFrameTimingEvents(
 996     scoped_ptr<cc::FrameTimingTracker::CompositeTimingSet> composite_events,
 997     scoped_ptr<cc::FrameTimingTracker::MainFrameTimingSet> main_frame_events) {
 998   for (const auto& composite_event : *composite_events ) {
 999     int64_t frameId = composite_event.first;
1000     const std::vector<cc::FrameTimingTracker::CompositeTimingEvent>& events =
1001         composite_event.second;
1002     std::vector<blink::WebFrameTimingEvent> webEvents;
1003     for (size_t i = 0; i < events.size(); ++i) {
1004       webEvents.push_back(blink::WebFrameTimingEvent(
1005           events[i].frame_id,
1006           (events[i].timestamp - base::TimeTicks()).InSecondsF()));
1007     }
1008     widget_->webwidget()->recordFrameTimingEvent(
1009         blink::WebWidget::CompositeEvent, frameId, webEvents);
1010   }
1011   for (const auto& main_frame_event : *main_frame_events ) {
1012     int64_t frameId = main_frame_event.first;
1013     const std::vector<cc::FrameTimingTracker::MainFrameTimingEvent>& events =
1014         main_frame_event.second;
1015     std::vector<blink::WebFrameTimingEvent> webEvents;
1016     for (size_t i = 0; i < events.size(); ++i) {
1017       webEvents.push_back(blink::WebFrameTimingEvent(
1018           events[i].frame_id,
1019           (events[i].timestamp - base::TimeTicks()).InSecondsF(),
1020           (events[i].end_time - base::TimeTicks()).InSecondsF()));
1021     }
1022     widget_->webwidget()->recordFrameTimingEvent(
1023         blink::WebWidget::RenderEvent, frameId, webEvents);
1024   }
1025 }
1026
1027 void RenderWidgetCompositor::RateLimitSharedMainThreadContext() {
1028   cc::ContextProvider* provider =
1029       compositor_deps_->GetSharedMainThreadContextProvider();
1030   // provider can be NULL after the GPU process crashed enough times and we
1031   // don't want to restart it any more (falling back to software).
1032   if (!provider)
1033     return;
1034   provider->ContextGL()->RateLimitOffscreenContextCHROMIUM();
1035 }
1036
1037 void RenderWidgetCompositor::SetSurfaceIdNamespace(
1038     uint32_t surface_id_namespace) {
1039   layer_tree_host_->set_surface_id_namespace(surface_id_namespace);
1040 }
1041
1042 }  // namespace content