// 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/strings/stringprintf.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/debug_border_draw_quad.h" #include "components/viz/common/quads/render_pass.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" 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), masks_to_bounds_(false), contents_opaque_(false), use_parent_backface_visibility_(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), debug_info_(nullptr), has_will_change_transform_hint_(false), needs_push_properties_(false), is_scrollbar_(false), scrollbars_hidden_(false), needs_show_scrollbars_(false), raster_even_if_not_drawn_(false), has_transform_node_(false), mirror_count_(0) { 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); } void LayerImpl::SetHasWillChangeTransformHint(bool has_will_change) { has_will_change_transform_hint_ = has_will_change; } ElementListType LayerImpl::GetElementTypeForAnimation() const { return IsActive() ? ElementListType::ACTIVE : ElementListType::PENDING; } void LayerImpl::SetDebugInfo( std::unique_ptr debug_info) { owned_debug_info_ = std::move(debug_info); debug_info_ = owned_debug_info_.get(); } 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_); state->SetAll(draw_properties_.target_space_transform, gfx::Rect(bounds()), draw_properties_.visible_layer_rect, draw_properties_.rounded_corner_bounds, draw_properties_.clip_rect, draw_properties_.is_clipped, 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 = draw_properties_.target_space_transform; scaled_draw_transform.Scale(SK_MScalar1 / layer_to_content_scale, SK_MScalar1 / layer_to_content_scale); EffectNode* effect_node = GetEffectTree().Node(effect_tree_index_); state->SetAll(scaled_draw_transform, content_rect, visible_content_rect, draw_properties().rounded_corner_bounds, draw_properties().clip_rect, draw_properties().is_clipped, 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; } if (masks_to_bounds_) { *color = DebugColors::MaskingLayerBorderColor(); *width = DebugColors::MaskingLayerBorderWidth(device_scale_factor); return; } *color = DebugColors::ContainerLayerBorderColor(); *width = DebugColors::ContainerLayerBorderWidth(device_scale_factor); } void LayerImpl::AppendDebugBorderQuad( viz::RenderPass* 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::RenderPass* 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; 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 = 0; } gfx::Vector2dF LayerImpl::ScrollBy(const gfx::Vector2dF& scroll) { ScrollTree& scroll_tree = GetScrollTree(); ScrollNode* scroll_node = scroll_tree.Node(scroll_tree_index()); return scroll_tree.ScrollBy(scroll_node, scroll, layer_tree_impl()); } void LayerImpl::SetScrollable(const gfx::Size& bounds) { if (scrollable_ && scroll_container_bounds_ == bounds) return; bool was_scrollable = scrollable_; scrollable_ = true; scroll_container_bounds_ = bounds; // Scrollbar positions depend on the bounds. layer_tree_impl()->SetScrollbarGeometriesNeedUpdate(); if (!was_scrollable) layer_tree_impl()->AddScrollableLayer(this); if (layer_tree_impl()->settings().scrollbar_animator == LayerTreeSettings::AURA_OVERLAY) { set_needs_show_scrollbars(true); } 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->masks_to_bounds_ = masks_to_bounds_; layer->contents_opaque_ = contents_opaque_; layer->may_contain_video_ = may_contain_video_; layer->use_parent_backface_visibility_ = use_parent_backface_visibility_; 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_; layer->has_will_change_transform_hint_ = has_will_change_transform_hint_; layer->mirror_count_ = mirror_count_; layer->scrollbars_hidden_ = scrollbars_hidden_; 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_); if (scrollable_) layer->SetScrollable(scroll_container_bounds_); layer->set_is_scrollbar(is_scrollbar_); // If the main thread commits multiple times before the impl thread actually // draws, then damage tracking will become incorrect if we simply clobber the // update_rect here. The LayerImpl's update_rect needs to accumulate (i.e. // union) any update changes that have occurred on the main thread. update_rect_.Union(layer->update_rect()); layer->SetUpdateRect(update_rect_); if (owned_debug_info_) layer->SetDebugInfo(std::move(owned_debug_info_)); // Reset any state that should be cleared for the next update. needs_show_scrollbars_ = false; layer_property_changed_not_from_property_trees_ = false; layer_property_changed_from_property_trees_ = false; needs_push_properties_ = false; update_rect_ = gfx::Rect(); } bool LayerImpl::IsAffectedByPageScale() const { TransformTree& transform_tree = GetTransformTree(); return transform_tree.Node(transform_tree_index()) ->in_subtree_of_page_scale_layer; } std::unique_ptr LayerImpl::LayerAsJson() const { std::unique_ptr result(new base::DictionaryValue); result->SetInteger("LayerId", id()); if (element_id()) result->SetString("ElementId", element_id().ToString()); result->SetString("LayerType", LayerTypeAsString()); auto list = std::make_unique(); list->AppendInteger(bounds().width()); list->AppendInteger(bounds().height()); result->Set("Bounds", std::move(list)); list = std::make_unique(); list->AppendInteger(offset_to_transform_parent().x()); list->AppendInteger(offset_to_transform_parent().y()); result->Set("OffsetToTransformParent", std::move(list)); result->SetBoolean("DrawsContent", draws_content_); result->SetBoolean("HitTestable", hit_testable_); result->SetBoolean("Is3dSorted", Is3dSorted()); result->SetDouble("Opacity", Opacity()); result->SetBoolean("ContentsOpaque", contents_opaque_); result->SetInteger("transform_tree_index", transform_tree_index()); result->SetInteger("clip_tree_index", clip_tree_index()); result->SetInteger("effect_tree_index", effect_tree_index()); result->SetInteger("scroll_tree_index", scroll_tree_index()); if (scrollable()) result->SetBoolean("Scrollable", true); if (!GetAllTouchActionRegions().IsEmpty()) { std::unique_ptr region = GetAllTouchActionRegions().AsValue(); result->Set("TouchRegion", std::move(region)); } if (!wheel_event_handler_region_.IsEmpty()) { std::unique_ptr region = wheel_event_handler_region_.AsValue(); result->Set("WheelRegion", std::move(region)); } if (!non_fast_scrollable_region_.IsEmpty()) { std::unique_ptr region = non_fast_scrollable_region_.AsValue(); result->Set("NonFastScrollableRegion", std::move(region)); } return result; } 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 } 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); } 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(); } ScrollbarLayerImplBase* LayerImpl::ToScrollbarLayer() { return nullptr; } 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; } SkColor LayerImpl::SafeOpaqueBackgroundColor() const { if (contents_opaque()) { // TODO(936906): We should uncomment this DCHECK, since the // |safe_opaque_background_color_| could be transparent if it is never set // (the default is 0). But to do that, one test needs to be fixed. // DCHECK_EQ(SkColorGetA(safe_opaque_background_color_), SK_AlphaOPAQUE); return safe_opaque_background_color_; } SkColor color = background_color(); if (SkColorGetA(color) == 255) color = SK_ColorTRANSPARENT; return color; } void LayerImpl::SetMasksToBounds(bool masks_to_bounds) { masks_to_bounds_ = masks_to_bounds; } void LayerImpl::SetContentsOpaque(bool opaque) { contents_opaque_ = 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.AsValue().release()); layer_tree_impl_->RemoveFromElementLayerList(element_id_); element_id_ = element_id; layer_tree_impl_->AddToElementLayerList(element_id_, this); } void LayerImpl::SetMirrorCount(int mirror_count) { mirror_count_ = mirror_count; } void LayerImpl::SetUpdateRect(const gfx::Rect& update_rect) { update_rect_ = 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()); } gfx::ScrollOffset LayerImpl::CurrentScrollOffset() const { return GetScrollTree().current_scroll_offset(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() {} gfx::ScrollOffset LayerImpl::MaxScrollOffset() const { return GetScrollTree().MaxScrollOffset(scroll_tree_index()); } gfx::ScrollOffset LayerImpl::ClampScrollOffsetToLimits( gfx::ScrollOffset offset) const { offset.SetToMin(MaxScrollOffset()); offset.SetToMax(gfx::ScrollOffset()); return offset; } gfx::Vector2dF LayerImpl::ClampScrollToMaxScrollOffset() { gfx::ScrollOffset old_offset = CurrentScrollOffset(); gfx::ScrollOffset clamped_offset = ClampScrollOffsetToLimits(old_offset); gfx::Vector2dF delta = clamped_offset.DeltaFrom(old_offset); if (!delta.IsZero()) ScrollBy(delta); return delta; } 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 { 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("draws_content", DrawsContent()); state->SetInteger("gpu_memory_usage", base::saturated_cast(GPUMemoryUsageInBytes())); if (element_id_) element_id_.AddToTracedValue(state); MathUtil::AddToTracedValue("scroll_offset", CurrentScrollOffset(), 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("can_use_lcd_text", CanUseLCDText()); state->SetBoolean("contents_opaque", contents_opaque()); state->SetBoolean("has_will_change_transform_hint", has_will_change_transform_hint()); if (debug_info_) state->SetValue("debug_info", debug_info_); } std::string LayerImpl::ToString() const { std::string str; base::JSONWriter::WriteWithOptions( *LayerAsJson(), base::JSONWriter::OPTIONS_OMIT_DOUBLE_TYPE_PRESERVATION | base::JSONWriter::OPTIONS_PRETTY_PRINT, &str); return str; } 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; } bool LayerImpl::CanUseLCDText() const { if (layer_tree_impl()->settings().layers_always_allowed_lcd_text) return true; if (!layer_tree_impl()->settings().can_use_lcd_text) return false; if (!contents_opaque()) return false; if (GetEffectTree().Node(effect_tree_index())->screen_space_opacity != 1.f) return false; if (!GetTransformTree() .Node(transform_tree_index()) ->node_and_ancestors_have_only_integer_translation) return false; if (static_cast(offset_to_transform_parent().x()) != offset_to_transform_parent().x()) return false; if (static_cast(offset_to_transform_parent().y()) != offset_to_transform_parent().y()) return false; if (has_will_change_transform_hint()) return false; return true; } int LayerImpl::GetSortingContextId() const { return GetTransformTree().Node(transform_tree_index())->sorting_context_id; } Region LayerImpl::GetInvalidationRegionForDebugging() { return Region(update_rect_); } gfx::Rect LayerImpl::GetEnclosingRectInTargetSpace() const { return MathUtil::MapEnclosingClippedRect(DrawTransform(), gfx::Rect(bounds())); } gfx::Rect LayerImpl::GetScaledEnclosingRectInTargetSpace(float scale) const { gfx::Transform scaled_draw_transform = DrawTransform(); scaled_draw_transform.Scale(SK_MScalar1 / scale, SK_MScalar1 / scale); gfx::Size scaled_bounds = gfx::ScaleToCeiledSize(bounds(), scale); return MathUtil::MapEnclosingClippedRect(scaled_draw_transform, gfx::Rect(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()); } float 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()) { float scale = MathUtil::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. return std::max(scale, default_scale); } gfx::Vector2dF transform_scales = MathUtil::ComputeTransform2dScaleComponents(transform, default_scale); constexpr float kMaxScaleRatio = 5.f; float lower_scale = std::min(transform_scales.x(), transform_scales.y()); float higher_scale = std::max(transform_scales.x(), transform_scales.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; } } // namespace cc