// Copyright 2012 The Chromium Authors. All rights reserved. // Use of this source code is governed by a BSD-style license that can be // found in the LICENSE file. #include "cc/layers/layer_impl.h" #include #include #include #include #include "base/json/json_reader.h" #include "base/json/json_writer.h" #include "base/numerics/safe_conversions.h" #include "base/trace_event/trace_event.h" #include "base/trace_event/traced_value.h" #include "cc/base/math_util.h" #include "cc/base/simple_enclosed_region.h" #include "cc/benchmarks/micro_benchmark_impl.h" #include "cc/debug/debug_colors.h" #include "cc/debug/layer_tree_debug_state.h" #include "cc/input/scroll_state.h" #include "cc/layers/layer.h" #include "cc/trees/clip_node.h" #include "cc/trees/draw_property_utils.h" #include "cc/trees/effect_node.h" #include "cc/trees/layer_tree_impl.h" #include "cc/trees/layer_tree_settings.h" #include "cc/trees/mutator_host.h" #include "cc/trees/proxy.h" #include "cc/trees/scroll_node.h" #include "cc/trees/transform_node.h" #include "components/viz/client/client_resource_provider.h" #include "components/viz/common/frame_sinks/copy_output_request.h" #include "components/viz/common/quads/compositor_render_pass.h" #include "components/viz/common/quads/debug_border_draw_quad.h" #include "components/viz/common/traced_value.h" #include "ui/gfx/geometry/point_conversions.h" #include "ui/gfx/geometry/quad_f.h" #include "ui/gfx/geometry/rect_conversions.h" #include "ui/gfx/geometry/size_conversions.h" #include "ui/gfx/geometry/vector2d_conversions.h" #include "ui/gfx/transform_util.h" namespace cc { LayerImpl::LayerImpl(LayerTreeImpl* tree_impl, int id, bool will_always_push_properties) : layer_id_(id), layer_tree_impl_(tree_impl), will_always_push_properties_(will_always_push_properties), scrollable_(false), layer_property_changed_not_from_property_trees_(false), layer_property_changed_from_property_trees_(false), may_contain_video_(false), contents_opaque_(false), contents_opaque_for_text_(false), should_check_backface_visibility_(false), draws_content_(false), contributes_to_drawn_render_surface_(false), hit_testable_(false), is_inner_viewport_scroll_layer_(false), background_color_(0), safe_opaque_background_color_(0), transform_tree_index_(TransformTree::kInvalidNodeId), effect_tree_index_(EffectTree::kInvalidNodeId), clip_tree_index_(ClipTree::kInvalidNodeId), scroll_tree_index_(ScrollTree::kInvalidNodeId), current_draw_mode_(DRAW_MODE_NONE), needs_push_properties_(false), needs_show_scrollbars_(false), raster_even_if_not_drawn_(false), has_transform_node_(false) { DCHECK_GT(layer_id_, 0); DCHECK(layer_tree_impl_); layer_tree_impl_->RegisterLayer(this); layer_tree_impl_->AddToElementLayerList(element_id_, this); SetNeedsPushProperties(); } LayerImpl::~LayerImpl() { layer_tree_impl_->UnregisterLayer(this); layer_tree_impl_->RemoveFromElementLayerList(element_id_); TRACE_EVENT_OBJECT_DELETED_WITH_ID( TRACE_DISABLED_BY_DEFAULT("cc.debug"), "cc::LayerImpl", this); } ElementListType LayerImpl::GetElementTypeForAnimation() const { return IsActive() ? ElementListType::ACTIVE : ElementListType::PENDING; } void LayerImpl::UpdateDebugInfo(LayerDebugInfo* debug_info) { // nullptr means we have stopped collecting debug info. if (!debug_info) { debug_info_.reset(); return; } auto new_invalidations = std::move(debug_info->invalidations); if (!debug_info_) { debug_info_ = std::make_unique(*debug_info); debug_info_->invalidations = std::move(new_invalidations); return; } // Accumulate invalidations until we draw the layer. auto existing_invalidations = std::move(debug_info_->invalidations); *debug_info_ = *debug_info; debug_info_->invalidations.insert(debug_info_->invalidations.begin(), existing_invalidations.begin(), existing_invalidations.end()); } void LayerImpl::SetTransformTreeIndex(int index) { transform_tree_index_ = index; } void LayerImpl::SetClipTreeIndex(int index) { clip_tree_index_ = index; } void LayerImpl::SetEffectTreeIndex(int index) { effect_tree_index_ = index; } int LayerImpl::render_target_effect_tree_index() const { EffectNode* effect_node = GetEffectTree().Node(effect_tree_index_); return GetEffectTree().GetRenderSurface(effect_tree_index_) ? effect_node->id : effect_node->target_id; } void LayerImpl::SetScrollTreeIndex(int index) { scroll_tree_index_ = index; } void LayerImpl::PopulateSharedQuadState(viz::SharedQuadState* state, bool contents_opaque) const { EffectNode* effect_node = GetEffectTree().Node(effect_tree_index_); absl::optional clip_rect; if (draw_properties_.is_clipped) { clip_rect = draw_properties_.clip_rect; } state->SetAll(draw_properties_.target_space_transform, gfx::Rect(bounds()), draw_properties_.visible_layer_rect, draw_properties_.mask_filter_info, clip_rect, contents_opaque, draw_properties_.opacity, effect_node->HasRenderSurface() ? SkBlendMode::kSrcOver : effect_node->blend_mode, GetSortingContextId()); state->is_fast_rounded_corner = draw_properties_.is_fast_rounded_corner; } void LayerImpl::PopulateScaledSharedQuadState(viz::SharedQuadState* state, float layer_to_content_scale, bool contents_opaque) const { gfx::Size scaled_bounds = gfx::ScaleToCeiledSize(bounds(), layer_to_content_scale); gfx::Rect scaled_visible_layer_rect = gfx::ScaleToEnclosingRect(visible_layer_rect(), layer_to_content_scale); scaled_visible_layer_rect.Intersect(gfx::Rect(scaled_bounds)); PopulateScaledSharedQuadStateWithContentRects( state, layer_to_content_scale, gfx::Rect(scaled_bounds), scaled_visible_layer_rect, contents_opaque); } void LayerImpl::PopulateScaledSharedQuadStateWithContentRects( viz::SharedQuadState* state, float layer_to_content_scale, const gfx::Rect& content_rect, const gfx::Rect& visible_content_rect, bool contents_opaque) const { gfx::Transform scaled_draw_transform = GetScaledDrawTransform(layer_to_content_scale); EffectNode* effect_node = GetEffectTree().Node(effect_tree_index_); absl::optional clip_rect; if (draw_properties().is_clipped) { clip_rect = draw_properties().clip_rect; } state->SetAll(scaled_draw_transform, content_rect, visible_content_rect, draw_properties().mask_filter_info, clip_rect, contents_opaque, draw_properties().opacity, effect_node->HasRenderSurface() ? SkBlendMode::kSrcOver : effect_node->blend_mode, GetSortingContextId()); state->is_fast_rounded_corner = draw_properties().is_fast_rounded_corner; } bool LayerImpl::WillDraw(DrawMode draw_mode, viz::ClientResourceProvider* resource_provider) { if (visible_layer_rect().IsEmpty() || draw_properties().occlusion_in_content_space.IsOccluded( visible_layer_rect())) { return false; } // Resourceless mode does not support non-default blend mode. If we draw, // the result will be just like kSrcOver which is not too bad for blend modes // other than kDstIn. For kDstIn mode, we should ignore the source because // otherwise we would draw a bad black mask over the destination. if (draw_mode == DRAW_MODE_RESOURCELESS_SOFTWARE) { const auto* effect_node = GetEffectTree().Node(effect_tree_index()); if (effect_node && effect_node->blend_mode == SkBlendMode::kDstIn) return false; } current_draw_mode_ = draw_mode; return true; } void LayerImpl::DidDraw(viz::ClientResourceProvider* resource_provider) { current_draw_mode_ = DRAW_MODE_NONE; } bool LayerImpl::ShowDebugBorders(DebugBorderType type) const { return layer_tree_impl()->debug_state().show_debug_borders.test(type); } void LayerImpl::GetDebugBorderProperties(SkColor* color, float* width) const { float device_scale_factor = layer_tree_impl() ? layer_tree_impl()->device_scale_factor() : 1; if (draws_content_) { *color = DebugColors::ContentLayerBorderColor(); *width = DebugColors::ContentLayerBorderWidth(device_scale_factor); return; } *color = DebugColors::ContainerLayerBorderColor(); *width = DebugColors::ContainerLayerBorderWidth(device_scale_factor); } void LayerImpl::AppendDebugBorderQuad( viz::CompositorRenderPass* render_pass, const gfx::Rect& quad_rect, const viz::SharedQuadState* shared_quad_state, AppendQuadsData* append_quads_data) const { SkColor color; float width; GetDebugBorderProperties(&color, &width); AppendDebugBorderQuad(render_pass, quad_rect, shared_quad_state, append_quads_data, color, width); } void LayerImpl::AppendDebugBorderQuad( viz::CompositorRenderPass* render_pass, const gfx::Rect& quad_rect, const viz::SharedQuadState* shared_quad_state, AppendQuadsData* append_quads_data, SkColor color, float width) const { if (!ShowDebugBorders(DebugBorderType::LAYER)) return; // This is the debug border quad layer size. The mojo serialization will fail // if the area overflows, so just drop this debug border quad in that case to // avoid crashes. if (!quad_rect.size().GetCheckedArea().IsValid()) return; gfx::Rect visible_quad_rect(quad_rect); auto* debug_border_quad = render_pass->CreateAndAppendDrawQuad(); debug_border_quad->SetNew( shared_quad_state, quad_rect, visible_quad_rect, color, width); if (contents_opaque()) { // When opaque, draw a second inner border that is thicker than the outer // border, but more transparent. static const float kFillOpacity = 0.3f; SkColor fill_color = SkColorSetA( color, static_cast(SkColorGetA(color) * kFillOpacity)); float fill_width = width * 3; gfx::Rect fill_rect = quad_rect; fill_rect.Inset(fill_width / 2.f, fill_width / 2.f); if (fill_rect.IsEmpty()) return; gfx::Rect visible_fill_rect = gfx::IntersectRects(visible_quad_rect, fill_rect); auto* fill_quad = render_pass->CreateAndAppendDrawQuad(); fill_quad->SetNew(shared_quad_state, fill_rect, visible_fill_rect, fill_color, fill_width); } } void LayerImpl::GetContentsResourceId(viz::ResourceId* resource_id, gfx::Size* resource_size, gfx::SizeF* resource_uv_size) const { NOTREACHED(); *resource_id = viz::kInvalidResourceId; } gfx::Vector2dF LayerImpl::ScrollBy(const gfx::Vector2dF& scroll) { ScrollTree& scroll_tree = GetScrollTree(); ScrollNode* scroll_node = scroll_tree.Node(scroll_tree_index()); DCHECK(scroll_node); return scroll_tree.ScrollBy(*scroll_node, scroll, layer_tree_impl()); } void LayerImpl::UpdateScrollable() { if (!element_id()) { scrollable_ = false; return; } const auto* scroll_node = GetScrollTree().FindNodeFromElementId(element_id()); bool was_scrollable = scrollable_; scrollable_ = scroll_node && scroll_node->scrollable; if (was_scrollable == scrollable_) { if (!scrollable_) return; if (scroll_container_bounds_ == scroll_node->container_bounds && scroll_contents_bounds_ == scroll_node->bounds) return; } scroll_container_bounds_ = scrollable_ ? scroll_node->container_bounds : gfx::Size(); scroll_contents_bounds_ = scrollable_ ? scroll_node->bounds : gfx::Size(); // Scrollbar positions depend on the bounds. layer_tree_impl()->SetScrollbarGeometriesNeedUpdate(); if (layer_tree_impl()->settings().scrollbar_animator == LayerTreeSettings::AURA_OVERLAY) { set_needs_show_scrollbars(scrollable_); } NoteLayerPropertyChanged(); } void LayerImpl::SetTouchActionRegion(TouchActionRegion region) { // Avoid recalculating the cached |all_touch_action_regions_| value. if (touch_action_region_ == region) return; touch_action_region_ = std::move(region); all_touch_action_regions_ = nullptr; } const Region& LayerImpl::GetAllTouchActionRegions() const { if (!all_touch_action_regions_) { all_touch_action_regions_ = std::make_unique(touch_action_region_.GetAllRegions()); } else { // Ensure the cached value of |all_touch_action_regions_| is up to date. DCHECK_EQ(touch_action_region_.GetAllRegions(), *all_touch_action_regions_); } return *all_touch_action_regions_; } std::unique_ptr LayerImpl::CreateLayerImpl( LayerTreeImpl* tree_impl) { return LayerImpl::Create(tree_impl, layer_id_); } bool LayerImpl::IsSnappedToPixelGridInTarget() { return false; } void LayerImpl::PushPropertiesTo(LayerImpl* layer) { DCHECK(layer->IsActive()); // The element id should be set first because other setters may // depend on it. Referencing element id on a layer is // deprecated. http://crbug.com/709137 layer->SetElementId(element_id_); layer->has_transform_node_ = has_transform_node_; layer->offset_to_transform_parent_ = offset_to_transform_parent_; layer->contents_opaque_ = contents_opaque_; layer->contents_opaque_for_text_ = contents_opaque_for_text_; layer->may_contain_video_ = may_contain_video_; layer->should_check_backface_visibility_ = should_check_backface_visibility_; layer->draws_content_ = draws_content_; layer->hit_testable_ = hit_testable_; layer->non_fast_scrollable_region_ = non_fast_scrollable_region_; layer->touch_action_region_ = touch_action_region_; layer->all_touch_action_regions_ = all_touch_action_regions_ ? std::make_unique(*all_touch_action_regions_) : nullptr; layer->wheel_event_handler_region_ = wheel_event_handler_region_; layer->background_color_ = background_color_; layer->safe_opaque_background_color_ = safe_opaque_background_color_; layer->transform_tree_index_ = transform_tree_index_; layer->effect_tree_index_ = effect_tree_index_; layer->clip_tree_index_ = clip_tree_index_; layer->scroll_tree_index_ = scroll_tree_index_; if (needs_show_scrollbars_) layer->needs_show_scrollbars_ = needs_show_scrollbars_; if (layer_property_changed_not_from_property_trees_ || layer_property_changed_from_property_trees_) layer->layer_tree_impl()->set_needs_update_draw_properties(); if (layer_property_changed_not_from_property_trees_) layer->layer_property_changed_not_from_property_trees_ = true; if (layer_property_changed_from_property_trees_) layer->layer_property_changed_from_property_trees_ = true; layer->SetBounds(bounds_); layer->UpdateScrollable(); layer->UnionUpdateRect(update_rect_); layer->UpdateDebugInfo(debug_info_.get()); // Reset any state that should be cleared for the next update. needs_show_scrollbars_ = false; ResetChangeTracking(); } bool LayerImpl::IsAffectedByPageScale() const { TransformTree& transform_tree = GetTransformTree(); return transform_tree.Node(transform_tree_index()) ->in_subtree_of_page_scale_layer; } bool LayerImpl::LayerPropertyChanged() const { return layer_property_changed_not_from_property_trees_ || LayerPropertyChangedFromPropertyTrees(); } bool LayerImpl::LayerPropertyChangedFromPropertyTrees() const { if (layer_property_changed_from_property_trees_ || GetPropertyTrees()->full_tree_damaged) return true; if (transform_tree_index() == TransformTree::kInvalidNodeId) return false; TransformNode* transform_node = GetTransformTree().Node(transform_tree_index()); if (transform_node && transform_node->transform_changed) return true; if (effect_tree_index() == EffectTree::kInvalidNodeId) return false; EffectNode* effect_node = GetEffectTree().Node(effect_tree_index()); if (effect_node && effect_node->effect_changed) return true; return false; } bool LayerImpl::LayerPropertyChangedNotFromPropertyTrees() const { return layer_property_changed_not_from_property_trees_; } void LayerImpl::NoteLayerPropertyChanged() { layer_property_changed_not_from_property_trees_ = true; layer_tree_impl()->set_needs_update_draw_properties(); } void LayerImpl::NoteLayerPropertyChangedFromPropertyTrees() { layer_property_changed_from_property_trees_ = true; layer_tree_impl()->set_needs_update_draw_properties(); } void LayerImpl::ValidateQuadResourcesInternal(viz::DrawQuad* quad) const { #if DCHECK_IS_ON() const viz::ClientResourceProvider* resource_provider = layer_tree_impl_->resource_provider(); for (viz::ResourceId resource_id : quad->resources) resource_provider->ValidateResource(resource_id); #endif } gfx::Transform LayerImpl::GetScaledDrawTransform( float layer_to_content_scale) const { gfx::Transform scaled_draw_transform = draw_properties_.target_space_transform; scaled_draw_transform.Scale(SK_Scalar1 / layer_to_content_scale, SK_Scalar1 / layer_to_content_scale); return scaled_draw_transform; } const char* LayerImpl::LayerTypeAsString() const { return "cc::LayerImpl"; } void LayerImpl::ResetChangeTracking() { layer_property_changed_not_from_property_trees_ = false; layer_property_changed_from_property_trees_ = false; needs_push_properties_ = false; update_rect_.SetRect(0, 0, 0, 0); if (debug_info_) debug_info_->invalidations.clear(); } bool LayerImpl::IsActive() const { return layer_tree_impl_->IsActiveTree(); } gfx::Size LayerImpl::bounds() const { if (!is_inner_viewport_scroll_layer_) return bounds_; auto viewport_bounds_delta = gfx::ToCeiledVector2d( GetPropertyTrees()->inner_viewport_scroll_bounds_delta()); return gfx::Size(bounds_.width() + viewport_bounds_delta.x(), bounds_.height() + viewport_bounds_delta.y()); } void LayerImpl::SetBounds(const gfx::Size& bounds) { if (bounds_ == bounds) return; bounds_ = bounds; // Scrollbar positions depend on the scrolling layer bounds. if (scrollable_) layer_tree_impl()->SetScrollbarGeometriesNeedUpdate(); NoteLayerPropertyChanged(); } bool LayerImpl::IsScrollbarLayer() const { return false; } bool LayerImpl::IsScrollerOrScrollbar() const { return IsScrollbarLayer() || GetScrollTree().FindNodeFromElementId(element_id()); } void LayerImpl::SetDrawsContent(bool draws_content) { if (draws_content_ == draws_content) return; draws_content_ = draws_content; NoteLayerPropertyChanged(); } void LayerImpl::SetHitTestable(bool should_hit_test) { if (hit_testable_ == should_hit_test) return; hit_testable_ = should_hit_test; NoteLayerPropertyChanged(); } bool LayerImpl::HitTestable() const { EffectTree& effect_tree = GetEffectTree(); bool should_hit_test = hit_testable_; // TODO(sunxd): remove or refactor SetHideLayerAndSubtree, or move this logic // to subclasses of Layer. See https://crbug.com/595843 and // https://crbug.com/931865. // The bit |subtree_hidden| can only be true for ui::Layers. Other layers are // not supposed to set this bit. if (effect_tree.Node(effect_tree_index())) { should_hit_test &= !effect_tree.Node(effect_tree_index())->subtree_hidden; } return should_hit_test; } void LayerImpl::SetBackgroundColor(SkColor background_color) { if (background_color_ == background_color) return; background_color_ = background_color; NoteLayerPropertyChanged(); } void LayerImpl::SetSafeOpaqueBackgroundColor(SkColor background_color) { safe_opaque_background_color_ = background_color; } void LayerImpl::SetContentsOpaque(bool opaque) { contents_opaque_ = opaque; contents_opaque_for_text_ = opaque; } void LayerImpl::SetContentsOpaqueForText(bool opaque) { DCHECK(!contents_opaque_ || opaque); contents_opaque_for_text_ = opaque; } float LayerImpl::Opacity() const { if (const EffectNode* node = GetEffectTree().Node(effect_tree_index())) return node->opacity; else return 1.f; } void LayerImpl::SetElementId(ElementId element_id) { if (element_id == element_id_) return; TRACE_EVENT1(TRACE_DISABLED_BY_DEFAULT("cc.debug"), "LayerImpl::SetElementId", "element", element_id.ToString()); layer_tree_impl_->RemoveFromElementLayerList(element_id_); element_id_ = element_id; layer_tree_impl_->AddToElementLayerList(element_id_, this); } void LayerImpl::UnionUpdateRect(const gfx::Rect& update_rect) { update_rect_.Union(update_rect); } gfx::Rect LayerImpl::GetDamageRect() const { return gfx::Rect(); } void LayerImpl::SetCurrentScrollOffset(const gfx::ScrollOffset& scroll_offset) { DCHECK(IsActive()); if (GetScrollTree().SetScrollOffset(element_id(), scroll_offset)) layer_tree_impl()->DidUpdateScrollOffset(element_id()); } SimpleEnclosedRegion LayerImpl::VisibleOpaqueRegion() const { if (contents_opaque()) return SimpleEnclosedRegion(visible_layer_rect()); return SimpleEnclosedRegion(); } void LayerImpl::DidBeginTracing() {} void LayerImpl::ReleaseResources() {} void LayerImpl::OnPurgeMemory() { ReleaseResources(); } void LayerImpl::ReleaseTileResources() {} void LayerImpl::RecreateTileResources() {} void LayerImpl::SetNeedsPushProperties() { // There's no need to push layer properties on the active tree, or when // |will_always_push_properties_| is true. if (will_always_push_properties_ || layer_tree_impl()->IsActiveTree()) return; if (!needs_push_properties_) { needs_push_properties_ = true; layer_tree_impl()->AddLayerShouldPushProperties(this); } } void LayerImpl::GetAllPrioritizedTilesForTracing( std::vector* prioritized_tiles) const { } void LayerImpl::AsValueInto(base::trace_event::TracedValue* state) const { // The output is consumed at least by // 1. DevTools for showing layer tree information for frame snapshots in // performance timeline (third_party/devtools_frontend/src/front_end/ // timeline_model/TracingLayerTree.js), // 2. trace_viewer // (third_party/catapult/tracing/tracing/extras/chrome/cc/layer_impl.html) // Note that trace_viewer uses "namingStyle" style instead of // "naming_style". The difference is intentional and the names are // converted automatically, but we need to keep this in mind when we // search trace_viewer code for the usage of the names here. // When making changes here, we need to make sure we won't break these // consumers. viz::TracedValue::MakeDictIntoImplicitSnapshotWithCategory( TRACE_DISABLED_BY_DEFAULT("cc.debug"), state, "cc::LayerImpl", LayerTypeAsString(), this); state->SetInteger("layer_id", id()); MathUtil::AddToTracedValue("bounds", bounds_, state); state->SetDouble("opacity", Opacity()); // For backward-compatibility of DevTools front-end. MathUtil::AddToTracedValue("position", gfx::PointF(), state); state->SetInteger("transform_tree_index", transform_tree_index()); state->SetInteger("clip_tree_index", clip_tree_index()); state->SetInteger("effect_tree_index", effect_tree_index()); state->SetInteger("scroll_tree_index", scroll_tree_index()); state->SetInteger("sorting_context_id", GetSortingContextId()); state->SetInteger("draws_content", DrawsContent()); state->SetInteger("gpu_memory_usage", base::saturated_cast(GPUMemoryUsageInBytes())); if (element_id_) element_id_.AddToTracedValue(state); if (!ScreenSpaceTransform().IsIdentity()) MathUtil::AddToTracedValue("screen_space_transform", ScreenSpaceTransform(), state); bool clipped; gfx::QuadF layer_quad = MathUtil::MapQuad(ScreenSpaceTransform(), gfx::QuadF(gfx::RectF(gfx::Rect(bounds()))), &clipped); MathUtil::AddToTracedValue("layer_quad", layer_quad, state); if (!GetAllTouchActionRegions().IsEmpty()) { state->BeginArray("all_touch_action_regions"); GetAllTouchActionRegions().AsValueInto(state); state->EndArray(); } if (!wheel_event_handler_region_.IsEmpty()) { state->BeginArray("wheel_event_handler_region"); wheel_event_handler_region_.AsValueInto(state); state->EndArray(); } if (!non_fast_scrollable_region_.IsEmpty()) { state->BeginArray("non_fast_scrollable_region"); non_fast_scrollable_region_.AsValueInto(state); state->EndArray(); } state->SetBoolean("hit_testable", HitTestable()); state->SetBoolean("contents_opaque", contents_opaque()); if (debug_info_) { state->SetString("layer_name", debug_info_->name); if (debug_info_->owner_node_id) state->SetInteger("owner_node", debug_info_->owner_node_id); if (debug_info_->compositing_reasons.size()) { state->BeginArray("compositing_reasons"); for (const char* reason : debug_info_->compositing_reasons) state->AppendString(reason); state->EndArray(); } if (debug_info_->compositing_reason_ids.size()) { state->BeginArray("compositing_reason_ids"); for (const char* reason_id : debug_info_->compositing_reason_ids) state->AppendString(reason_id); state->EndArray(); } if (debug_info_->invalidations.size()) { state->BeginArray("annotated_invalidation_rects"); for (auto& invalidation : debug_info_->invalidations) { state->BeginDictionary(); MathUtil::AddToTracedValue("geometry_rect", invalidation.rect, state); state->SetString("reason", invalidation.reason); state->SetString("client", invalidation.client); state->EndDictionary(); } state->EndArray(); } } } std::string LayerImpl::ToString() const { base::trace_event::TracedValueJSON value; AsValueInto(&value); return value.ToFormattedJSON(); } size_t LayerImpl::GPUMemoryUsageInBytes() const { return 0; } void LayerImpl::RunMicroBenchmark(MicroBenchmarkImpl* benchmark) { benchmark->RunOnLayer(this); } gfx::Transform LayerImpl::DrawTransform() const { // Only drawn layers have up-to-date draw properties. if (!contributes_to_drawn_render_surface()) { return draw_property_utils::DrawTransform(this, GetTransformTree(), GetEffectTree()); } return draw_properties().target_space_transform; } gfx::Transform LayerImpl::ScreenSpaceTransform() const { // Only drawn layers have up-to-date draw properties. if (!contributes_to_drawn_render_surface()) { return draw_property_utils::ScreenSpaceTransform(this, GetTransformTree()); } return draw_properties().screen_space_transform; } int LayerImpl::GetSortingContextId() const { return GetTransformTree().Node(transform_tree_index())->sorting_context_id; } Region LayerImpl::GetInvalidationRegionForDebugging() { return Region(update_rect_); } gfx::Rect LayerImpl::GetEnclosingVisibleRectInTargetSpace() const { return GetScaledEnclosingVisibleRectInTargetSpace(1.0f); } gfx::Rect LayerImpl::GetScaledEnclosingVisibleRectInTargetSpace( float scale) const { // TODO(oshima): Define an utility function to scale layer and conslidate with // the logic in ComputeDrawPropertiesOfVisibleLayers() in // draw_property_util.cc. DCHECK_GT(scale, 0.0); bool only_draws_visible_content = GetPropertyTrees() ->effect_tree.Node(effect_tree_index()) ->only_draws_visible_content; gfx::Rect drawable_bounds = visible_layer_rect(); if (!only_draws_visible_content) { drawable_bounds = gfx::Rect(bounds()); } gfx::Transform scaled_draw_transform = GetScaledDrawTransform(scale); gfx::Rect scaled_bounds = ScaleToEnclosingRect(drawable_bounds, scale); return MathUtil::MapEnclosingClippedRect(scaled_draw_transform, scaled_bounds); } RenderSurfaceImpl* LayerImpl::render_target() { return GetEffectTree().GetRenderSurface(render_target_effect_tree_index()); } const RenderSurfaceImpl* LayerImpl::render_target() const { return GetEffectTree().GetRenderSurface(render_target_effect_tree_index()); } gfx::Vector2dF LayerImpl::GetIdealContentsScale() const { float page_scale = IsAffectedByPageScale() ? layer_tree_impl()->current_page_scale_factor() : 1.f; float device_scale = layer_tree_impl()->device_scale_factor(); float default_scale = page_scale * device_scale; const auto& transform = ScreenSpaceTransform(); if (transform.HasPerspective()) { // TODO(crbug.com/1196414): This function should return a 2D scale. float scale = gfx::ComputeApproximateMaxScale(transform); const int kMaxTilesToCoverLayerDimension = 5; // Cap the scale in a way that it should be covered by at most // |kMaxTilesToCoverLayerDimension|^2 default tile sizes. If this is left // uncapped, then we can fairly easily use too much memory (or too many // tiles). See crbug.com/752382 for an example of such a page. Note that // because this is an approximation anyway, it's fine to use a smaller scale // that desired. On top of this, the layer has a perspective transform so // technically it could all be within the viewport, so it's important for us // to have a reasonable scale here. The scale we use would also be at least // |default_scale|, as checked below. float scale_cap = std::min( (layer_tree_impl()->settings().default_tile_size.width() - 2) * kMaxTilesToCoverLayerDimension / static_cast(bounds().width()), (layer_tree_impl()->settings().default_tile_size.height() - 2) * kMaxTilesToCoverLayerDimension / static_cast(bounds().height())); scale = std::min(scale, scale_cap); // Since we're approximating the scale anyway, round it to the nearest // integer to prevent jitter when animating the transform. scale = std::round(scale); // Don't let the scale fall below the default scale. scale = std::max(scale, default_scale); return gfx::Vector2dF(scale, scale); } gfx::Vector2dF transform_scales = gfx::ComputeTransform2dScaleComponents(transform, default_scale); // TODO(crbug.com/1196414): Remove this scale cap. float scale_cap = GetPreferredRasterScale(transform_scales); transform_scales.SetToMin(gfx::Vector2dF(scale_cap, scale_cap)); return transform_scales; } float LayerImpl::GetIdealContentsScaleKey() const { return GetPreferredRasterScale(GetIdealContentsScale()); } float LayerImpl::GetPreferredRasterScale( gfx::Vector2dF raster_space_scale_factor) { constexpr float kMaxScaleRatio = 5.f; float lower_scale = std::min(raster_space_scale_factor.x(), raster_space_scale_factor.y()); float higher_scale = std::max(raster_space_scale_factor.x(), raster_space_scale_factor.y()); return std::min(kMaxScaleRatio * lower_scale, higher_scale); } PropertyTrees* LayerImpl::GetPropertyTrees() const { return layer_tree_impl_->property_trees(); } ClipTree& LayerImpl::GetClipTree() const { return GetPropertyTrees()->clip_tree; } EffectTree& LayerImpl::GetEffectTree() const { return GetPropertyTrees()->effect_tree; } ScrollTree& LayerImpl::GetScrollTree() const { return GetPropertyTrees()->scroll_tree; } TransformTree& LayerImpl::GetTransformTree() const { return GetPropertyTrees()->transform_tree; } void LayerImpl::EnsureValidPropertyTreeIndices() const { DCHECK(GetTransformTree().Node(transform_tree_index())); DCHECK(GetEffectTree().Node(effect_tree_index())); DCHECK(GetClipTree().Node(clip_tree_index())); DCHECK(GetScrollTree().Node(scroll_tree_index())); } bool LayerImpl::is_surface_layer() const { return false; } static float TranslationFromActiveTreeLayerScreenSpaceTransform( LayerImpl* pending_tree_layer) { LayerTreeImpl* layer_tree_impl = pending_tree_layer->layer_tree_impl(); if (layer_tree_impl) { LayerImpl* active_tree_layer = layer_tree_impl->FindActiveTreeLayerById(pending_tree_layer->id()); if (active_tree_layer) { gfx::Transform active_tree_screen_space_transform = active_tree_layer->draw_properties().screen_space_transform; if (active_tree_screen_space_transform.IsIdentity()) return 0.f; if (active_tree_screen_space_transform.ApproximatelyEqual( pending_tree_layer->draw_properties().screen_space_transform)) return 0.f; return (active_tree_layer->draw_properties() .screen_space_transform.To2dTranslation() - pending_tree_layer->draw_properties() .screen_space_transform.To2dTranslation()) .Length(); } } return 0.f; } // A layer jitters if its screen space transform is same on two successive // commits, but has changed in between the commits. CalculateLayerJitter // computes the jitter for the layer. int LayerImpl::CalculateJitter() { float jitter = 0.f; performance_properties().translation_from_last_frame = 0.f; performance_properties().last_commit_screen_space_transform = draw_properties().screen_space_transform; if (!visible_layer_rect().IsEmpty()) { if (draw_properties().screen_space_transform.ApproximatelyEqual( performance_properties().last_commit_screen_space_transform)) { float translation_from_last_commit = TranslationFromActiveTreeLayerScreenSpaceTransform(this); if (translation_from_last_commit > 0.f) { performance_properties().num_fixed_point_hits++; performance_properties().translation_from_last_frame = translation_from_last_commit; if (performance_properties().num_fixed_point_hits > LayerTreeImpl::kFixedPointHitsThreshold) { // Jitter = Translation from fixed point * sqrt(Area of the layer). // The square root of the area is used instead of the area to match // the dimensions of both terms on the rhs. jitter += translation_from_last_commit * sqrt(visible_layer_rect().size().GetArea()); } } else { performance_properties().num_fixed_point_hits = 0; } } } return jitter; } std::string LayerImpl::DebugName() const { return debug_info_ ? debug_info_->name : ""; } gfx::ContentColorUsage LayerImpl::GetContentColorUsage() const { return gfx::ContentColorUsage::kSRGB; } } // namespace cc