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
 456   // When pinching in, only show the pinch-viewport overlay scrollbars if the
 457   // page scale is at least some threshold away from the minimum. i.e. don't
 458   // show the pinch scrollbars when at minimum scale.
 459   settings.scrollbar_show_scale_threshold = 1.05f;
 460 #endif
 461
 462   if (cmd->HasSwitch(switches::kEnableLowResTiling))
 463     settings.create_low_res_tiling = true;
 464   if (cmd->HasSwitch(switches::kDisableLowResTiling))
 465     settings.create_low_res_tiling = false;
 466   if (cmd->HasSwitch(cc::switches::kEnableBeginFrameScheduling))
 467     settings.use_external_begin_frame_source = true;
 468
 469   if (widget_->for_oopif()) {
 470     // TODO(simonhong): Apply BeginFrame scheduling for OOPIF.
 471     // See crbug.com/471411.
 472     settings.use_external_begin_frame_source = false;
 473   }
 474
 475   scoped_refptr<base::SingleThreadTaskRunner> compositor_thread_task_runner =
 476       compositor_deps_->GetCompositorImplThreadTaskRunner();
 477   scoped_refptr<base::SingleThreadTaskRunner>
 478       main_thread_compositor_task_runner =
 479           compositor_deps_->GetCompositorMainThreadTaskRunner();
 480   cc::SharedBitmapManager* shared_bitmap_manager =
 481       compositor_deps_->GetSharedBitmapManager();
 482   gpu::GpuMemoryBufferManager* gpu_memory_buffer_manager =
 483       compositor_deps_->GetGpuMemoryBufferManager();
 484   cc::TaskGraphRunner* task_graph_runner =
 485       compositor_deps_->GetTaskGraphRunner();
 486
 487   scoped_ptr<cc::BeginFrameSource> external_begin_frame_source;
 488   if (settings.use_external_begin_frame_source) {
 489     external_begin_frame_source =
 490         compositor_deps_->CreateExternalBeginFrameSource(widget_->routing_id());
 491   }
 492
 493   cc::LayerTreeHost::InitParams params;
 494   params.client = this;
 495   params.shared_bitmap_manager = shared_bitmap_manager;
 496   params.gpu_memory_buffer_manager = gpu_memory_buffer_manager;
 497   params.settings = &settings;
 498   params.task_graph_runner = task_graph_runner;
 499   params.main_task_runner = main_thread_compositor_task_runner;
 500   params.external_begin_frame_source = external_begin_frame_source.Pass();
 501   if (compositor_thread_task_runner.get()) {
 502     layer_tree_host_ = cc::LayerTreeHost::CreateThreaded(
 503         compositor_thread_task_runner, &params);
 504   } else {
 505     layer_tree_host_ = cc::LayerTreeHost::CreateSingleThreaded(this, &params);
 506   }
 507   DCHECK(layer_tree_host_);
 508 }
 509
 510 RenderWidgetCompositor::~RenderWidgetCompositor() {}
 511
 512 const base::WeakPtr<cc::InputHandler>&
 513 RenderWidgetCompositor::GetInputHandler() {
 514   return layer_tree_host_->GetInputHandler();
 515 }
 516
 517 bool RenderWidgetCompositor::BeginMainFrameRequested() const {
 518   return layer_tree_host_->BeginMainFrameRequested();
 519 }
 520
 521 void RenderWidgetCompositor::SetNeedsDisplayOnAllLayers() {
 522   layer_tree_host_->SetNeedsDisplayOnAllLayers();
 523 }
 524
 525 void RenderWidgetCompositor::SetRasterizeOnlyVisibleContent() {
 526   cc::LayerTreeDebugState current = layer_tree_host_->debug_state();
 527   current.rasterize_only_visible_content = true;
 528   layer_tree_host_->SetDebugState(current);
 529 }
 530
 531 void RenderWidgetCompositor::SetNeedsRedrawRect(gfx::Rect damage_rect) {
 532   layer_tree_host_->SetNeedsRedrawRect(damage_rect);
 533 }
 534
 535 void RenderWidgetCompositor::SetNeedsForcedRedraw() {
 536   layer_tree_host_->SetNextCommitForcesRedraw();
 537   setNeedsAnimate();
 538 }
 539
 540 scoped_ptr<cc::SwapPromiseMonitor>
 541 RenderWidgetCompositor::CreateLatencyInfoSwapPromiseMonitor(
 542     ui::LatencyInfo* latency) {
 543   return scoped_ptr<cc::SwapPromiseMonitor>(
 544       new cc::LatencyInfoSwapPromiseMonitor(
 545           latency, layer_tree_host_.get(), NULL));
 546 }
 547
 548 void RenderWidgetCompositor::QueueSwapPromise(
 549     scoped_ptr<cc::SwapPromise> swap_promise) {
 550   layer_tree_host_->QueueSwapPromise(swap_promise.Pass());
 551 }
 552
 553 int RenderWidgetCompositor::GetSourceFrameNumber() const {
 554   return layer_tree_host_->source_frame_number();
 555 }
 556
 557 void RenderWidgetCompositor::SetNeedsUpdateLayers() {
 558   layer_tree_host_->SetNeedsUpdateLayers();
 559 }
 560
 561 void RenderWidgetCompositor::SetNeedsCommit() {
 562   layer_tree_host_->SetNeedsCommit();
 563 }
 564
 565 void RenderWidgetCompositor::NotifyInputThrottledUntilCommit() {
 566   layer_tree_host_->NotifyInputThrottledUntilCommit();
 567 }
 568
 569 const cc::Layer* RenderWidgetCompositor::GetRootLayer() const {
 570   return layer_tree_host_->root_layer();
 571 }
 572
 573 int RenderWidgetCompositor::ScheduleMicroBenchmark(
 574     const std::string& name,
 575     scoped_ptr<base::Value> value,
 576     const base::Callback<void(scoped_ptr<base::Value>)>& callback) {
 577   return layer_tree_host_->ScheduleMicroBenchmark(name, value.Pass(), callback);
 578 }
 579
 580 bool RenderWidgetCompositor::SendMessageToMicroBenchmark(
 581     int id,
 582     scoped_ptr<base::Value> value) {
 583   return layer_tree_host_->SendMessageToMicroBenchmark(id, value.Pass());
 584 }
 585
 586 void RenderWidgetCompositor::StartCompositor() {
 587   layer_tree_host_->SetLayerTreeHostClientReady();
 588 }
 589
 590 void RenderWidgetCompositor::setRootLayer(const blink::WebLayer& layer) {
 591   layer_tree_host_->SetRootLayer(
 592       static_cast<const cc_blink::WebLayerImpl*>(&layer)->layer());
 593 }
 594
 595 void RenderWidgetCompositor::clearRootLayer() {
 596   layer_tree_host_->SetRootLayer(scoped_refptr<cc::Layer>());
 597 }
 598
 599 void RenderWidgetCompositor::attachCompositorAnimationTimeline(
 600     blink::WebCompositorAnimationTimeline* compositor_timeline) {
 601   DCHECK(compositor_timeline);
 602   DCHECK(layer_tree_host_->animation_host());
 603   layer_tree_host_->animation_host()->AddAnimationTimeline(
 604       static_cast<const cc_blink::WebCompositorAnimationTimelineImpl*>(
 605           compositor_timeline)->animation_timeline());
 606 }
 607
 608 void RenderWidgetCompositor::detachCompositorAnimationTimeline(
 609     blink::WebCompositorAnimationTimeline* compositor_timeline) {
 610   DCHECK(compositor_timeline);
 611   DCHECK(layer_tree_host_->animation_host());
 612   layer_tree_host_->animation_host()->RemoveAnimationTimeline(
 613       static_cast<const cc_blink::WebCompositorAnimationTimelineImpl*>(
 614           compositor_timeline)->animation_timeline());
 615 }
 616
 617 void RenderWidgetCompositor::setViewportSize(
 618     const WebSize&,
 619     const WebSize& device_viewport_size) {
 620   layer_tree_host_->SetViewportSize(device_viewport_size);
 621 }
 622
 623 void RenderWidgetCompositor::setViewportSize(
 624     const WebSize& device_viewport_size) {
 625   layer_tree_host_->SetViewportSize(device_viewport_size);
 626 }
 627
 628 WebSize RenderWidgetCompositor::layoutViewportSize() const {
 629   return layer_tree_host_->device_viewport_size();
 630 }
 631
 632 WebSize RenderWidgetCompositor::deviceViewportSize() const {
 633   return layer_tree_host_->device_viewport_size();
 634 }
 635
 636 WebFloatPoint RenderWidgetCompositor::adjustEventPointForPinchZoom(
 637     const WebFloatPoint& point) const {
 638   return point;
 639 }
 640
 641 void RenderWidgetCompositor::setDeviceScaleFactor(float device_scale) {
 642   layer_tree_host_->SetDeviceScaleFactor(device_scale);
 643 }
 644
 645 float RenderWidgetCompositor::deviceScaleFactor() const {
 646   return layer_tree_host_->device_scale_factor();
 647 }
 648
 649 void RenderWidgetCompositor::setBackgroundColor(blink::WebColor color) {
 650   layer_tree_host_->set_background_color(color);
 651 }
 652
 653 void RenderWidgetCompositor::setHasTransparentBackground(bool transparent) {
 654   layer_tree_host_->set_has_transparent_background(transparent);
 655 }
 656
 657 void RenderWidgetCompositor::setVisible(bool visible) {
 658   layer_tree_host_->SetVisible(visible);
 659 }
 660
 661 void RenderWidgetCompositor::setPageScaleFactorAndLimits(
 662     float page_scale_factor, float minimum, float maximum) {
 663   layer_tree_host_->SetPageScaleFactorAndLimits(
 664       page_scale_factor, minimum, maximum);
 665 }
 666
 667 void RenderWidgetCompositor::startPageScaleAnimation(
 668     const blink::WebPoint& destination,
 669     bool use_anchor,
 670     float new_page_scale,
 671     double duration_sec) {
 672   base::TimeDelta duration = base::TimeDelta::FromMicroseconds(
 673       duration_sec * base::Time::kMicrosecondsPerSecond);
 674   layer_tree_host_->StartPageScaleAnimation(
 675       gfx::Vector2d(destination.x, destination.y),
 676       use_anchor,
 677       new_page_scale,
 678       duration);
 679 }
 680
 681 void RenderWidgetCompositor::heuristicsForGpuRasterizationUpdated(
 682     bool matches_heuristics) {
 683   layer_tree_host_->SetHasGpuRasterizationTrigger(matches_heuristics);
 684 }
 685
 686 void RenderWidgetCompositor::setNeedsAnimate() {
 687   layer_tree_host_->SetNeedsAnimate();
 688 }
 689
 690 void RenderWidgetCompositor::didStopFlinging() {
 691   layer_tree_host_->DidStopFlinging();
 692 }
 693
 694 void RenderWidgetCompositor::registerForAnimations(blink::WebLayer* layer) {
 695   cc::Layer* cc_layer = static_cast<cc_blink::WebLayerImpl*>(layer)->layer();
 696   cc_layer->RegisterForAnimations(layer_tree_host_->animation_registrar());
 697 }
 698
 699 void RenderWidgetCompositor::registerViewportLayers(
 700     const blink::WebLayer* overscrollElasticityLayer,
 701     const blink::WebLayer* pageScaleLayer,
 702     const blink::WebLayer* innerViewportScrollLayer,
 703     const blink::WebLayer* outerViewportScrollLayer) {
 704   layer_tree_host_->RegisterViewportLayers(
 705       // TODO(bokan): This check can probably be removed now, but it looks
 706       // like overscroll elasticity may still be NULL until PinchViewport
 707       // registers its layers.
 708       // The scroll elasticity layer will only exist when using pinch virtual
 709       // viewports.
 710       overscrollElasticityLayer
 711           ? static_cast<const cc_blink::WebLayerImpl*>(
 712                 overscrollElasticityLayer)->layer()
 713           : NULL,
 714       static_cast<const cc_blink::WebLayerImpl*>(pageScaleLayer)->layer(),
 715       static_cast<const cc_blink::WebLayerImpl*>(innerViewportScrollLayer)
 716           ->layer(),
 717       // TODO(bokan): This check can probably be removed now, but it looks
 718       // like overscroll elasticity may still be NULL until PinchViewport
 719       // registers its layers.
 720       // The outer viewport layer will only exist when using pinch virtual
 721       // viewports.
 722       outerViewportScrollLayer
 723           ? static_cast<const cc_blink::WebLayerImpl*>(outerViewportScrollLayer)
 724                 ->layer()
 725           : NULL);
 726 }
 727
 728 void RenderWidgetCompositor::clearViewportLayers() {
 729   layer_tree_host_->RegisterViewportLayers(
 730       scoped_refptr<cc::Layer>(), scoped_refptr<cc::Layer>(),
 731       scoped_refptr<cc::Layer>(), scoped_refptr<cc::Layer>());
 732 }
 733
 734 void RenderWidgetCompositor::registerSelection(
 735     const blink::WebSelection& selection) {
 736   layer_tree_host_->RegisterSelection(ConvertWebSelection(selection));
 737 }
 738
 739 void RenderWidgetCompositor::clearSelection() {
 740   cc::LayerSelection empty_selection;
 741   layer_tree_host_->RegisterSelection(empty_selection);
 742 }
 743
 744 void CompositeAndReadbackAsyncCallback(
 745     blink::WebCompositeAndReadbackAsyncCallback* callback,
 746     scoped_ptr<cc::CopyOutputResult> result) {
 747   if (result->HasBitmap()) {
 748     scoped_ptr<SkBitmap> result_bitmap = result->TakeBitmap();
 749     callback->didCompositeAndReadback(*result_bitmap);
 750   } else {
 751     callback->didCompositeAndReadback(SkBitmap());
 752   }
 753 }
 754
 755 bool RenderWidgetCompositor::CompositeIsSynchronous() const {
 756   return !compositor_deps_->GetCompositorImplThreadTaskRunner().get() &&
 757          !layer_tree_host_->settings().single_thread_proxy_scheduler;
 758 }
 759
 760 void RenderWidgetCompositor::layoutAndPaintAsync(
 761     blink::WebLayoutAndPaintAsyncCallback* callback) {
 762   DCHECK(!temporary_copy_output_request_ && !layout_and_paint_async_callback_);
 763   layout_and_paint_async_callback_ = callback;
 764
 765   if (CompositeIsSynchronous()) {
 766     base::ThreadTaskRunnerHandle::Get()->PostTask(
 767         FROM_HERE, base::Bind(&RenderWidgetCompositor::LayoutAndUpdateLayers,
 768                               weak_factory_.GetWeakPtr()));
 769   } else {
 770     layer_tree_host_->SetNeedsCommit();
 771   }
 772 }
 773
 774 void RenderWidgetCompositor::LayoutAndUpdateLayers() {
 775   DCHECK(CompositeIsSynchronous());
 776   layer_tree_host_->LayoutAndUpdateLayers();
 777   InvokeLayoutAndPaintCallback();
 778 }
 779
 780 void RenderWidgetCompositor::InvokeLayoutAndPaintCallback() {
 781   if (!layout_and_paint_async_callback_)
 782     return;
 783   layout_and_paint_async_callback_->didLayoutAndPaint();
 784   layout_and_paint_async_callback_ = nullptr;
 785 }
 786
 787 void RenderWidgetCompositor::compositeAndReadbackAsync(
 788     blink::WebCompositeAndReadbackAsyncCallback* callback) {
 789   DCHECK(!temporary_copy_output_request_ && !layout_and_paint_async_callback_);
 790   temporary_copy_output_request_ =
 791       cc::CopyOutputRequest::CreateBitmapRequest(
 792           base::Bind(&CompositeAndReadbackAsyncCallback, callback));
 793
 794   // Force a commit to happen. The temporary copy output request will
 795   // be installed after layout which will happen as a part of the commit, for
 796   // widgets that delay the creation of their output surface.
 797   if (CompositeIsSynchronous()) {
 798     base::ThreadTaskRunnerHandle::Get()->PostTask(
 799         FROM_HERE, base::Bind(&RenderWidgetCompositor::SynchronouslyComposite,
 800                               weak_factory_.GetWeakPtr()));
 801   } else {
 802     layer_tree_host_->SetNeedsCommit();
 803   }
 804 }
 805
 806 void RenderWidgetCompositor::SynchronouslyComposite() {
 807   DCHECK(CompositeIsSynchronous());
 808   layer_tree_host_->Composite(base::TimeTicks::Now());
 809 }
 810
 811 void RenderWidgetCompositor::finishAllRendering() {
 812   layer_tree_host_->FinishAllRendering();
 813 }
 814
 815 void RenderWidgetCompositor::setDeferCommits(bool defer_commits) {
 816   layer_tree_host_->SetDeferCommits(defer_commits);
 817 }
 818
 819 int RenderWidgetCompositor::layerTreeId() const {
 820   return layer_tree_host_->id();
 821 }
 822
 823 void RenderWidgetCompositor::setShowFPSCounter(bool show) {
 824   cc::LayerTreeDebugState debug_state = layer_tree_host_->debug_state();
 825   debug_state.show_fps_counter = show;
 826   layer_tree_host_->SetDebugState(debug_state);
 827 }
 828
 829 void RenderWidgetCompositor::setShowPaintRects(bool show) {
 830   cc::LayerTreeDebugState debug_state = layer_tree_host_->debug_state();
 831   debug_state.show_paint_rects = show;
 832   layer_tree_host_->SetDebugState(debug_state);
 833 }
 834
 835 void RenderWidgetCompositor::setShowDebugBorders(bool show) {
 836   cc::LayerTreeDebugState debug_state = layer_tree_host_->debug_state();
 837   debug_state.show_debug_borders = show;
 838   layer_tree_host_->SetDebugState(debug_state);
 839 }
 840
 841 void RenderWidgetCompositor::setContinuousPaintingEnabled(bool enabled) {
 842   cc::LayerTreeDebugState debug_state = layer_tree_host_->debug_state();
 843   debug_state.continuous_painting = enabled;
 844   layer_tree_host_->SetDebugState(debug_state);
 845 }
 846
 847 void RenderWidgetCompositor::setShowScrollBottleneckRects(bool show) {
 848   cc::LayerTreeDebugState debug_state = layer_tree_host_->debug_state();
 849   debug_state.show_touch_event_handler_rects = show;
 850   debug_state.show_wheel_event_handler_rects = show;
 851   debug_state.show_non_fast_scrollable_rects = show;
 852   layer_tree_host_->SetDebugState(debug_state);
 853 }
 854
 855 void RenderWidgetCompositor::updateTopControlsState(
 856     WebTopControlsState constraints,
 857     WebTopControlsState current,
 858     bool animate) {
 859   layer_tree_host_->UpdateTopControlsState(ConvertTopControlsState(constraints),
 860                                            ConvertTopControlsState(current),
 861                                            animate);
 862 }
 863
 864 void RenderWidgetCompositor::setTopControlsHeight(float height, bool shrink) {
 865     layer_tree_host_->SetTopControlsHeight(height, shrink);
 866 }
 867
 868 void RenderWidgetCompositor::setTopControlsShownRatio(float ratio) {
 869   layer_tree_host_->SetTopControlsShownRatio(ratio);
 870 }
 871
 872 void RenderWidgetCompositor::WillBeginMainFrame() {
 873   widget_->WillBeginCompositorFrame();
 874 }
 875
 876 void RenderWidgetCompositor::DidBeginMainFrame() {
 877 }
 878
 879 void RenderWidgetCompositor::BeginMainFrame(const cc::BeginFrameArgs& args) {
 880   double frame_time_sec = (args.frame_time - base::TimeTicks()).InSecondsF();
 881   double deadline_sec = (args.deadline - base::TimeTicks()).InSecondsF();
 882   double interval_sec = args.interval.InSecondsF();
 883   WebBeginFrameArgs web_begin_frame_args =
 884       WebBeginFrameArgs(frame_time_sec, deadline_sec, interval_sec);
 885   compositor_deps_->GetRendererScheduler()->WillBeginFrame(args);
 886   widget_->webwidget()->beginFrame(web_begin_frame_args);
 887 }
 888
 889 void RenderWidgetCompositor::BeginMainFrameNotExpectedSoon() {
 890   compositor_deps_->GetRendererScheduler()->BeginFrameNotExpectedSoon();
 891 }
 892
 893 void RenderWidgetCompositor::Layout() {
 894   widget_->webwidget()->layout();
 895
 896   if (temporary_copy_output_request_) {
 897     // For WebViewImpl, this will always have a root layer.  For other widgets,
 898     // the widget may be closed before servicing this request, so ignore it.
 899     if (cc::Layer* root_layer = layer_tree_host_->root_layer()) {
 900       root_layer->RequestCopyOfOutput(temporary_copy_output_request_.Pass());
 901     } else {
 902       temporary_copy_output_request_->SendEmptyResult();
 903       temporary_copy_output_request_ = nullptr;
 904     }
 905   }
 906 }
 907
 908 void RenderWidgetCompositor::ApplyViewportDeltas(
 909     const gfx::Vector2dF& inner_delta,
 910     const gfx::Vector2dF& outer_delta,
 911     const gfx::Vector2dF& elastic_overscroll_delta,
 912     float page_scale,
 913     float top_controls_delta) {
 914   widget_->webwidget()->applyViewportDeltas(
 915       inner_delta,
 916       outer_delta,
 917       elastic_overscroll_delta,
 918       page_scale,
 919       top_controls_delta);
 920 }
 921
 922 void RenderWidgetCompositor::RequestNewOutputSurface() {
 923   // If the host is closing, then no more compositing is possible.  This
 924   // prevents shutdown races between handling the close message and
 925   // the CreateOutputSurface task.
 926   if (widget_->host_closing())
 927     return;
 928
 929   bool fallback =
 930       num_failed_recreate_attempts_ >= OUTPUT_SURFACE_RETRIES_BEFORE_FALLBACK;
 931   scoped_ptr<cc::OutputSurface> surface(widget_->CreateOutputSurface(fallback));
 932
 933   if (!surface) {
 934     DidFailToInitializeOutputSurface();
 935     return;
 936   }
 937
 938   DCHECK_EQ(surface->capabilities().max_frames_pending, 1);
 939
 940   layer_tree_host_->SetOutputSurface(surface.Pass());
 941 }
 942
 943 void RenderWidgetCompositor::DidInitializeOutputSurface() {
 944   num_failed_recreate_attempts_ = 0;
 945 }
 946
 947 void RenderWidgetCompositor::DidFailToInitializeOutputSurface() {
 948   ++num_failed_recreate_attempts_;
 949   // Tolerate a certain number of recreation failures to work around races
 950   // in the output-surface-lost machinery.
 951   LOG_IF(FATAL, (num_failed_recreate_attempts_ >= MAX_OUTPUT_SURFACE_RETRIES))
 952       << "Failed to create a fallback OutputSurface.";
 953
 954   base::ThreadTaskRunnerHandle::Get()->PostTask(
 955       FROM_HERE, base::Bind(&RenderWidgetCompositor::RequestNewOutputSurface,
 956                             weak_factory_.GetWeakPtr()));
 957 }
 958
 959 void RenderWidgetCompositor::WillCommit() {
 960   InvokeLayoutAndPaintCallback();
 961 }
 962
 963 void RenderWidgetCompositor::DidCommit() {
 964   DCHECK(!temporary_copy_output_request_);
 965   widget_->DidCommitCompositorFrame();
 966   compositor_deps_->GetRendererScheduler()->DidCommitFrameToCompositor();
 967 }
 968
 969 void RenderWidgetCompositor::DidCommitAndDrawFrame() {
 970   widget_->DidCommitAndDrawCompositorFrame();
 971 }
 972
 973 void RenderWidgetCompositor::DidCompleteSwapBuffers() {
 974   widget_->DidCompleteSwapBuffers();
 975   bool threaded = !!compositor_deps_->GetCompositorImplThreadTaskRunner().get();
 976   if (!threaded)
 977     widget_->OnSwapBuffersComplete();
 978 }
 979
 980 void RenderWidgetCompositor::DidCompletePageScaleAnimation() {
 981   widget_->DidCompletePageScaleAnimation();
 982 }
 983
 984 void RenderWidgetCompositor::ScheduleAnimation() {
 985   widget_->scheduleAnimation();
 986 }
 987
 988 void RenderWidgetCompositor::DidPostSwapBuffers() {
 989   widget_->OnSwapBuffersPosted();
 990 }
 991
 992 void RenderWidgetCompositor::DidAbortSwapBuffers() {
 993   widget_->OnSwapBuffersAborted();
 994 }
 995
 996 void RenderWidgetCompositor::RecordFrameTimingEvents(
 997     scoped_ptr<cc::FrameTimingTracker::CompositeTimingSet> composite_events,
 998     scoped_ptr<cc::FrameTimingTracker::MainFrameTimingSet> main_frame_events) {
 999   for (const auto& composite_event : *composite_events ) {
1000     int64_t frameId = composite_event.first;
1001     const std::vector<cc::FrameTimingTracker::CompositeTimingEvent>& events =
1002         composite_event.second;
1003     std::vector<blink::WebFrameTimingEvent> webEvents;
1004     for (size_t i = 0; i < events.size(); ++i) {
1005       webEvents.push_back(blink::WebFrameTimingEvent(
1006           events[i].frame_id,
1007           (events[i].timestamp - base::TimeTicks()).InSecondsF()));
1008     }
1009     widget_->webwidget()->recordFrameTimingEvent(
1010         blink::WebWidget::CompositeEvent, frameId, webEvents);
1011   }
1012   for (const auto& main_frame_event : *main_frame_events ) {
1013     int64_t frameId = main_frame_event.first;
1014     const std::vector<cc::FrameTimingTracker::MainFrameTimingEvent>& events =
1015         main_frame_event.second;
1016     std::vector<blink::WebFrameTimingEvent> webEvents;
1017     for (size_t i = 0; i < events.size(); ++i) {
1018       webEvents.push_back(blink::WebFrameTimingEvent(
1019           events[i].frame_id,
1020           (events[i].timestamp - base::TimeTicks()).InSecondsF(),
1021           (events[i].end_time - base::TimeTicks()).InSecondsF()));
1022     }
1023     widget_->webwidget()->recordFrameTimingEvent(
1024         blink::WebWidget::RenderEvent, frameId, webEvents);
1025   }
1026 }
1027
1028 void RenderWidgetCompositor::RateLimitSharedMainThreadContext() {
1029   cc::ContextProvider* provider =
1030       compositor_deps_->GetSharedMainThreadContextProvider();
1031   // provider can be NULL after the GPU process crashed enough times and we
1032   // don't want to restart it any more (falling back to software).
1033   if (!provider)
1034     return;
1035   provider->ContextGL()->RateLimitOffscreenContextCHROMIUM();
1036 }
1037
1038 void RenderWidgetCompositor::SetSurfaceIdNamespace(
1039     uint32_t surface_id_namespace) {
1040   layer_tree_host_->set_surface_id_namespace(surface_id_namespace);
1041 }
1042
1043 }  // namespace content