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layer_tree_impl.cc
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// Copyright 2011 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "cc/trees/layer_tree_impl.h"
#include <stddef.h>
#include <stdint.h>
#include <algorithm>
#include <iterator>
#include <limits>
#include <memory>
#include <set>
#include <unordered_set>
#include <utility>
#include "base/containers/adapters.h"
#include "base/containers/contains.h"
#include "base/cxx17_backports.h"
#include "base/debug/crash_logging.h"
#include "base/debug/dump_without_crashing.h"
#include "base/json/json_writer.h"
#include "base/memory/raw_ptr.h"
#include "base/metrics/histogram_macros.h"
#include "base/notreached.h"
#include "base/ranges/algorithm.h"
#include "base/strings/stringprintf.h"
#include "base/time/time.h"
#include "base/timer/elapsed_timer.h"
#include "base/trace_event/trace_event.h"
#include "base/trace_event/traced_value.h"
#include "cc/base/devtools_instrumentation.h"
#include "cc/base/features.h"
#include "cc/base/histograms.h"
#include "cc/base/math_util.h"
#include "cc/base/synced_property.h"
#include "cc/input/page_scale_animation.h"
#include "cc/input/scrollbar_animation_controller.h"
#include "cc/layers/effect_tree_layer_list_iterator.h"
#include "cc/layers/heads_up_display_layer_impl.h"
#include "cc/layers/layer.h"
#include "cc/layers/render_surface_impl.h"
#include "cc/layers/scrollbar_layer_impl_base.h"
#include "cc/resources/ui_resource_request.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_frame_sink.h"
#include "cc/trees/layer_tree_host_impl.h"
#include "cc/trees/mutator_host.h"
#include "cc/trees/occlusion_tracker.h"
#include "cc/trees/property_tree.h"
#include "cc/trees/scroll_node.h"
#include "cc/trees/transform_node.h"
#include "cc/trees/tree_synchronizer.h"
#include "cc/view_transition/view_transition_request.h"
#include "components/viz/common/traced_value.h"
#include "ui/gfx/geometry/box_f.h"
#include "ui/gfx/geometry/point_conversions.h"
#include "ui/gfx/geometry/rect_conversions.h"
#include "ui/gfx/geometry/size_conversions.h"
#include "ui/gfx/geometry/vector2d_conversions.h"
namespace cc {
namespace {
// Small helper class that saves the current viewport location as the user sees
// it and resets to the same location.
class ViewportAnchor {
public:
ViewportAnchor(ScrollNode* inner_scroll,
ScrollNode* outer_scroll,
LayerTreeImpl* tree_impl)
: inner_(inner_scroll), outer_(outer_scroll), tree_impl_(tree_impl) {
viewport_in_content_coordinates_ =
scroll_tree()
.current_scroll_offset(inner_->element_id)
.OffsetFromOrigin();
if (outer_) {
viewport_in_content_coordinates_ +=
scroll_tree()
.current_scroll_offset(outer_->element_id)
.OffsetFromOrigin();
}
}
void ResetViewportToAnchoredPosition() {
DCHECK(outer_);
scroll_tree().ClampScrollToMaxScrollOffset(*inner_, tree_impl_);
scroll_tree().ClampScrollToMaxScrollOffset(*outer_, tree_impl_);
gfx::Vector2dF viewport_location =
scroll_tree()
.current_scroll_offset(inner_->element_id)
.OffsetFromOrigin() +
scroll_tree()
.current_scroll_offset(outer_->element_id)
.OffsetFromOrigin();
gfx::Vector2dF delta = viewport_in_content_coordinates_ - viewport_location;
delta = scroll_tree().ScrollBy(*inner_, delta, tree_impl_);
scroll_tree().ScrollBy(*outer_, delta, tree_impl_);
}
private:
ScrollTree& scroll_tree() {
return tree_impl_->property_trees()->scroll_tree_mutable();
}
raw_ptr<ScrollNode> inner_;
raw_ptr<ScrollNode> outer_;
raw_ptr<LayerTreeImpl> tree_impl_;
gfx::Vector2dF viewport_in_content_coordinates_;
};
std::pair<gfx::PointF, gfx::PointF> GetVisibleSelectionEndPoints(
const gfx::RectF& rect,
const gfx::PointF& top,
const gfx::PointF& bottom) {
gfx::PointF start(base::clamp(top.x(), rect.x(), rect.right()),
base::clamp(top.y(), rect.y(), rect.bottom()));
gfx::PointF end = start + (bottom - top);
return {start, end};
}
} // namespace
void LayerTreeLifecycle::AdvanceTo(LifecycleState next_state) {
switch (next_state) {
case (kNotSyncing):
DCHECK_EQ(state_, kLastSyncState);
break;
case (kBeginningSync):
case (kSyncedPropertyTrees):
case (kSyncedLayerProperties):
// Only allow tree synchronization states to be transitioned in order.
DCHECK_EQ(state_ + 1, next_state);
break;
}
state_ = next_state;
}
LayerTreeImpl::LayerTreeImpl(
LayerTreeHostImpl& host_impl,
scoped_refptr<SyncedScale> page_scale_factor,
scoped_refptr<SyncedBrowserControls> top_controls_shown_ratio,
scoped_refptr<SyncedBrowserControls> bottom_controls_shown_ratio,
scoped_refptr<SyncedElasticOverscroll> elastic_overscroll)
: host_impl_(&host_impl),
source_frame_number_(-1),
is_first_frame_after_commit_tracker_(-1),
hud_layer_(nullptr),
property_trees_(host_impl),
background_color_(SkColors::kTransparent),
last_scrolled_scroll_node_index_(kInvalidPropertyNodeId),
page_scale_factor_(page_scale_factor),
min_page_scale_factor_(0),
max_page_scale_factor_(0),
external_page_scale_factor_(1.f),
device_scale_factor_(1.f),
painted_device_scale_factor_(1.f),
elastic_overscroll_(elastic_overscroll),
needs_update_draw_properties_(true),
scrollbar_geometries_need_update_(false),
needs_full_tree_sync_(true),
needs_surface_ranges_sync_(false),
next_activation_forces_redraw_(false),
handle_visibility_changed_(false),
have_scroll_event_handlers_(false),
event_listener_properties_(),
top_controls_shown_ratio_(std::move(top_controls_shown_ratio)),
bottom_controls_shown_ratio_(std::move(bottom_controls_shown_ratio)) {
property_trees()->set_is_main_thread(false);
}
LayerTreeImpl::~LayerTreeImpl() {
// Need to explicitly clear the tree prior to destroying this so that
// the LayerTreeImpl pointer is still valid in the LayerImpl dtor.
DCHECK(LayerListIsEmpty());
}
void LayerTreeImpl::Shutdown() {
DetachLayers();
BreakSwapPromises(IsActiveTree() ? SwapPromise::SWAP_FAILS
: SwapPromise::ACTIVATION_FAILS);
DCHECK(LayerListIsEmpty());
}
void LayerTreeImpl::ReleaseResources() {
for (auto* layer : *this)
layer->ReleaseResources();
}
void LayerTreeImpl::OnPurgeMemory() {
for (auto* layer : *this)
layer->OnPurgeMemory();
}
void LayerTreeImpl::ReleaseTileResources() {
for (auto* layer : *this)
layer->ReleaseTileResources();
}
void LayerTreeImpl::RecreateTileResources() {
for (auto* layer : *this)
layer->RecreateTileResources();
}
void LayerTreeImpl::DidUpdateScrollOffset(ElementId id) {
// Scrollbar positions depend on the current scroll offset.
SetScrollbarGeometriesNeedUpdate();
DCHECK(lifecycle().AllowsPropertyTreeAccess());
const ScrollTree& scroll_tree = property_trees()->scroll_tree();
const auto* scroll_node = scroll_tree.FindNodeFromElementId(id);
if (!scroll_node) {
// A scroll node should always exist on the active tree but may not exist
// if we're updating the other trees from the active tree. This can occur
// when the pending tree represents a different page, for example.
DCHECK(!IsActiveTree());
return;
}
// This bit controls whether we'll update the transform node based on a
// changed scroll offset. If scroll unification is off, we always do this
// because the scroll handling code will only invoke a scroll update on nodes
// that can compositor scroll. However, with scroll unification, we can
// mutate scroll nodes which have main thread scrolling reasons, or aren't
// backed by a layer at all. In those cases, we don't want to produce any
// immediate changes in the compositor, we want the scroll to propagate
// through Blink in a commit and have Blink update properties, paint,
// compositing, etc. Thus, we avoid mutating the transform tree in this case.
bool should_realize_scroll_on_compositor =
!base::FeatureList::IsEnabled(features::kScrollUnification) ||
scroll_tree.CanRealizeScrollsOnCompositor(*scroll_node);
DCHECK(scroll_node->transform_id != kInvalidPropertyNodeId);
TransformTree& transform_tree = property_trees()->transform_tree_mutable();
auto* transform_node = transform_tree.Node(scroll_node->transform_id);
if (should_realize_scroll_on_compositor) {
if (transform_node->scroll_offset !=
scroll_tree.current_scroll_offset(id)) {
transform_node->scroll_offset = scroll_tree.current_scroll_offset(id);
transform_node->needs_local_transform_update = true;
transform_tree.set_needs_update(true);
}
transform_node->transform_changed = true;
property_trees()->set_changed(true);
set_needs_update_draw_properties();
}
if (IsActiveTree()) {
// Ensure the other trees are kept in sync.
if (host_impl_->pending_tree())
host_impl_->pending_tree()->DidUpdateScrollOffset(id);
if (host_impl_->recycle_tree())
host_impl_->recycle_tree()->DidUpdateScrollOffset(id);
}
}
void LayerTreeImpl::UpdateScrollbarGeometries() {
if (!IsActiveTree())
return;
DCHECK(lifecycle().AllowsPropertyTreeAccess());
// Layer properties such as bounds should be up-to-date.
DCHECK(lifecycle().AllowsLayerPropertyAccess());
if (!scrollbar_geometries_need_update_)
return;
for (auto& pair : element_id_to_scrollbar_layer_ids_) {
ElementId scrolling_element_id = pair.first;
const auto& scroll_tree = property_trees()->scroll_tree();
const auto* scroll_node =
scroll_tree.FindNodeFromElementId(scrolling_element_id);
if (!scroll_node)
continue;
gfx::PointF current_offset =
scroll_tree.current_scroll_offset(scrolling_element_id);
gfx::SizeF scrolling_size(scroll_node->bounds);
gfx::Size bounds_size(scroll_tree.container_bounds(scroll_node->id));
bool is_viewport_scrollbar = scroll_node == InnerViewportScrollNode() ||
scroll_node == OuterViewportScrollNode();
if (is_viewport_scrollbar) {
gfx::SizeF viewport_bounds(bounds_size);
if (scroll_node == InnerViewportScrollNode()) {
DCHECK_EQ(scroll_node, InnerViewportScrollNode());
auto* outer_scroll_node = OuterViewportScrollNode();
DCHECK(outer_scroll_node);
// Add offset and bounds contribution of outer viewport.
current_offset +=
scroll_tree.current_scroll_offset(outer_scroll_node->element_id)
.OffsetFromOrigin();
gfx::SizeF outer_viewport_bounds(
scroll_tree.container_bounds(outer_scroll_node->id));
viewport_bounds.SetToMin(outer_viewport_bounds);
// The scrolling size is only determined by the outer viewport.
scrolling_size = gfx::SizeF(outer_scroll_node->bounds);
} else {
DCHECK_EQ(scroll_node, OuterViewportScrollNode());
auto* inner_scroll_node = InnerViewportScrollNode();
DCHECK(inner_scroll_node);
// Add offset and bounds contribution of inner viewport.
current_offset +=
scroll_tree.current_scroll_offset(inner_scroll_node->element_id)
.OffsetFromOrigin();
gfx::SizeF inner_viewport_bounds(
scroll_tree.container_bounds(inner_scroll_node->id));
viewport_bounds.SetToMin(inner_viewport_bounds);
}
viewport_bounds.InvScale(current_page_scale_factor());
bounds_size = ToCeiledSize(viewport_bounds);
}
for (auto* scrollbar : ScrollbarsFor(scrolling_element_id)) {
if (scrollbar->orientation() == ScrollbarOrientation::HORIZONTAL) {
scrollbar->SetCurrentPos(current_offset.x());
scrollbar->SetClipLayerLength(bounds_size.width());
scrollbar->SetScrollLayerLength(scrolling_size.width());
} else {
scrollbar->SetCurrentPos(current_offset.y());
scrollbar->SetClipLayerLength(bounds_size.height());
scrollbar->SetScrollLayerLength(scrolling_size.height());
}
if (is_viewport_scrollbar) {
scrollbar->SetVerticalAdjust(
property_trees_.inner_viewport_container_bounds_delta().y());
}
}
}
scrollbar_geometries_need_update_ = false;
}
const RenderSurfaceImpl* LayerTreeImpl::RootRenderSurface() const {
return property_trees_.effect_tree().GetRenderSurface(
kContentsRootPropertyNodeId);
}
bool LayerTreeImpl::LayerListIsEmpty() const {
return layer_list_.empty();
}
void LayerTreeImpl::SetRootLayerForTesting(std::unique_ptr<LayerImpl> layer) {
DetachLayers();
if (layer)
AddLayer(std::move(layer));
host_impl_->OnCanDrawStateChangedForTree();
}
void LayerTreeImpl::OnCanDrawStateChangedForTree() {
host_impl_->OnCanDrawStateChangedForTree();
}
void LayerTreeImpl::InvalidateRegionForImages(
const PaintImageIdFlatSet& images_to_invalidate) {
TRACE_EVENT_BEGIN1("cc", "LayerTreeImpl::InvalidateRegionForImages",
"total_layer_count", picture_layers_.size());
DCHECK(IsSyncTree());
size_t no_images_count = 0;
size_t no_invalidation_count = 0;
size_t invalidated_count = 0;
if (!images_to_invalidate.empty()) {
// TODO(khushalsagar): It might be better to keep track of layers with
// images and only iterate through those here.
for (auto* picture_layer : picture_layers_) {
auto result =
picture_layer->InvalidateRegionForImages(images_to_invalidate);
switch (result) {
case PictureLayerImpl::ImageInvalidationResult::kNoImages:
++no_images_count;
break;
case PictureLayerImpl::ImageInvalidationResult::kNoInvalidation:
++no_invalidation_count;
break;
case PictureLayerImpl::ImageInvalidationResult::kInvalidated:
++invalidated_count;
break;
}
}
}
TRACE_EVENT_END1(
"cc", "LayerTreeImpl::InvalidateRegionForImages", "counts",
base::StringPrintf("no_images[%zu] no_invalidaton[%zu] invalidated[%zu]",
no_images_count, no_invalidation_count,
invalidated_count));
}
void LayerTreeImpl::UpdateViewportContainerSizes() {
if (!InnerViewportScrollNode())
return;
DCHECK(OuterViewportScrollNode());
ViewportAnchor anchor(InnerViewportScrollNode(), OuterViewportScrollNode(),
this);
float top_controls_shown_ratio =
top_controls_shown_ratio_->Current(IsActiveTree());
float bottom_controls_shown_ratio =
bottom_controls_shown_ratio_->Current(IsActiveTree());
float top_controls_layout_height = browser_controls_shrink_blink_size()
? top_controls_height()
: top_controls_min_height();
float top_content_offset =
top_controls_height() > 0
? top_controls_height() * top_controls_shown_ratio
: 0.f;
float delta_from_top_controls =
top_controls_layout_height - top_content_offset;
float bottom_controls_layout_height = browser_controls_shrink_blink_size()
? bottom_controls_height()
: bottom_controls_min_height();
float bottom_content_offset =
bottom_controls_height() > 0
? bottom_controls_height() * bottom_controls_shown_ratio
: 0.f;
delta_from_top_controls +=
bottom_controls_layout_height - bottom_content_offset;
// Adjust the viewport layers by shrinking/expanding the container to account
// for changes in the size (e.g. browser controls) since the last resize from
// Blink.
auto* property_trees = this->property_trees();
gfx::Vector2dF bounds_delta(0.f, delta_from_top_controls);
if (property_trees->inner_viewport_container_bounds_delta() == bounds_delta)
return;
property_trees->SetInnerViewportContainerBoundsDelta(bounds_delta);
// Adjust the outer viewport container as well, since adjusting only the
// inner may cause its bounds to exceed those of the outer, causing scroll
// clamping.
gfx::Vector2dF scaled_bounds_delta =
gfx::ScaleVector2d(bounds_delta, 1.f / min_page_scale_factor());
property_trees->SetOuterViewportContainerBoundsDelta(scaled_bounds_delta);
// outer_viewport_container_bounds_delta and
// inner_viewport_scroll_bounds_delta are the same thing.
DCHECK_EQ(scaled_bounds_delta,
property_trees->inner_viewport_scroll_bounds_delta());
if (auto* outer_clip_node = OuterViewportClipNode()) {
float adjusted_container_height =
OuterViewportScrollNode()->container_bounds.height() +
scaled_bounds_delta.y();
outer_clip_node->clip.set_height(adjusted_container_height);
// Expand all clips between the outer viewport and the inner viewport.
auto* outer_ancestor =
property_trees->clip_tree_mutable().parent(outer_clip_node);
while (outer_ancestor && outer_ancestor->id != kRootPropertyNodeId) {
outer_ancestor->clip.Union(outer_clip_node->clip);
outer_ancestor =
property_trees->clip_tree_mutable().parent(outer_ancestor);
}
}
anchor.ResetViewportToAnchoredPosition();
property_trees->clip_tree_mutable().set_needs_update(true);
property_trees->set_full_tree_damaged(true);
set_needs_update_draw_properties();
// Viewport scrollbar positions are determined using the viewport bounds
// delta.
SetScrollbarGeometriesNeedUpdate();
set_needs_update_draw_properties();
}
bool LayerTreeImpl::IsRootLayer(const LayerImpl* layer) const {
return !layer_list_.empty() && layer_list_[0].get() == layer;
}
gfx::PointF LayerTreeImpl::TotalScrollOffset() const {
gfx::Vector2dF offset;
const auto& scroll_tree = property_trees()->scroll_tree();
if (auto* inner_scroll = InnerViewportScrollNode()) {
offset += scroll_tree.current_scroll_offset(inner_scroll->element_id)
.OffsetFromOrigin();
DCHECK(OuterViewportScrollNode());
offset +=
scroll_tree.current_scroll_offset(OuterViewportScrollNode()->element_id)
.OffsetFromOrigin();
}
return gfx::PointAtOffsetFromOrigin(offset);
}
gfx::PointF LayerTreeImpl::TotalMaxScrollOffset() const {
gfx::Vector2dF offset;
const auto& scroll_tree = property_trees()->scroll_tree();
if (viewport_property_ids_.inner_scroll != kInvalidPropertyNodeId) {
offset += scroll_tree.MaxScrollOffset(viewport_property_ids_.inner_scroll)
.OffsetFromOrigin();
}
if (viewport_property_ids_.outer_scroll != kInvalidPropertyNodeId) {
offset += scroll_tree.MaxScrollOffset(viewport_property_ids_.outer_scroll)
.OffsetFromOrigin();
}
return gfx::PointAtOffsetFromOrigin(offset);
}
OwnedLayerImplList LayerTreeImpl::DetachLayers() {
render_surface_list_.clear();
set_needs_update_draw_properties();
OwnedLayerImplList result = std::move(layer_list_);
// TODO(crbug.com/1229805): remove diagnostic CHECK
CHECK(!layer_list_.size());
return result;
}
OwnedLayerImplList LayerTreeImpl::DetachLayersKeepingRootLayerForTesting() {
auto layers = DetachLayers();
SetRootLayerForTesting(std::move(layers[0]));
return layers;
}
void LayerTreeImpl::SetPropertyTrees(PropertyTrees& property_trees,
bool preserve_change_tracking) {
PropertyTreesChangeState change_state;
property_trees.GetChangeState(change_state);
SetPropertyTrees(property_trees, change_state, preserve_change_tracking);
}
void LayerTreeImpl::SetPropertyTrees(const PropertyTrees& property_trees,
PropertyTreesChangeState& change_state,
bool preserve_change_tracking) {
// Updating the scroll tree shouldn't clobber the currently scrolling node so
// stash it and restore it at the end of this method. To maintain the
// current scrolling node we need to use element ids which are stable across
// the property tree update in SetPropertyTrees.
ElementId scrolling_element_id;
if (IsActiveTree()) {
if (ScrollNode* scrolling_node = CurrentlyScrollingNode())
scrolling_element_id = scrolling_node->element_id;
}
std::vector<std::unique_ptr<RenderSurfaceImpl>> old_render_surfaces;
property_trees_.effect_tree_mutable().TakeRenderSurfaces(
&old_render_surfaces);
if (preserve_change_tracking) {
change_state.full_tree_damaged |= property_trees_.full_tree_damaged();
property_trees_.GetChangedNodes(change_state.changed_effect_nodes,
change_state.changed_transform_nodes);
}
property_trees_ = property_trees;
property_trees_.ApplyChangedNodes(change_state.changed_effect_nodes,
change_state.changed_transform_nodes);
property_trees_.set_changed(change_state.changed);
property_trees_.set_needs_rebuild(change_state.needs_rebuild);
property_trees_.set_full_tree_damaged(change_state.full_tree_damaged);
property_trees_.effect_tree_mutable().ApplyRenderSurfaceChangedFlags(
change_state.surface_property_changed_flags);
bool render_surfaces_changed =
property_trees_.effect_tree_mutable().CreateOrReuseRenderSurfaces(
&old_render_surfaces, this);
if (render_surfaces_changed)
set_needs_update_draw_properties();
property_trees_.effect_tree_mutable().PullCopyRequestsFrom(
change_state.effect_tree_copy_requests);
property_trees_.set_is_main_thread(false);
property_trees_.set_is_active(IsActiveTree());
// The value of some effect node properties (like is_drawn) depends on
// whether we are on the active tree or not. So, we need to update the
// effect tree.
if (IsActiveTree())
property_trees_.effect_tree_mutable().set_needs_update(true);
const ScrollNode* scrolling_node = nullptr;
if (scrolling_element_id) {
auto& scroll_tree = property_trees_.scroll_tree();
scrolling_node = scroll_tree.FindNodeFromElementId(scrolling_element_id);
}
SetCurrentlyScrollingNode(scrolling_node);
}
void LayerTreeImpl::PullPropertiesFrom(
CommitState& commit_state,
const ThreadUnsafeCommitState& unsafe_state) {
lifecycle().AdvanceTo(LayerTreeLifecycle::kBeginningSync);
if (commit_state.next_commit_forces_redraw)
ForceRedrawNextActivation();
if (commit_state.next_commit_forces_recalculate_raster_scales)
ForceRecalculateRasterScales();
AddPresentationCallbacks(
std::move(commit_state.pending_presentation_callbacks));
AddSuccessfulPresentationCallbacks(
std::move(commit_state.pending_successful_presentation_callbacks));
if (commit_state.needs_full_tree_sync)
TreeSynchronizer::SynchronizeTrees(commit_state, unsafe_state, this);
if (commit_state.clear_caches_on_next_commit) {
host_impl_->ClearHistory();
host_impl_->ClearCaches();
}
TRACE_EVENT0("cc", "LayerTreeImpl::PullProperties");
PullPropertyTreesFrom(commit_state, unsafe_state);
lifecycle().AdvanceTo(LayerTreeLifecycle::kSyncedPropertyTrees);
if (commit_state.needs_surface_ranges_sync) {
ClearSurfaceRanges();
SetSurfaceRanges(commit_state.SurfaceRanges());
}
TreeSynchronizer::PushLayerProperties(commit_state, unsafe_state, this);
lifecycle().AdvanceTo(LayerTreeLifecycle::kSyncedLayerProperties);
// This must happen after synchronizing property trees and after pushing
// properties, which updates the clobber_active_value flag.
// TODO(pdr): Enforce this comment with DCHECKS and a lifecycle state.
property_trees()->scroll_tree_mutable().PushScrollUpdatesFromMainThread(
unsafe_state.property_trees, this,
settings().commit_fractional_scroll_deltas);
PullLayerTreePropertiesFrom(commit_state);
PassSwapPromises(std::move(commit_state.swap_promises));
AppendEventsMetricsFromMainThread(std::move(commit_state.event_metrics));
set_ui_resource_request_queue(commit_state.ui_resource_request_queue);
// This must happen after synchronizing property trees and after push
// properties, which updates property tree indices, but before animation
// host pushes properties as animation host push properties can change
// KeyframeModel::InEffect and we want the old InEffect value for updating
// property tree scrolling and animation.
// TODO(pdr): Enforce this comment with DCHECKS and a lifecycle state.
UpdatePropertyTreeAnimationFromMainThread();
TRACE_EVENT0("cc", "LayerTreeHost::AnimationHost::PushProperties");
DCHECK(mutator_host());
unsafe_state.mutator_host->PushPropertiesTo(mutator_host(),
unsafe_state.property_trees);
MoveChangeTrackingToLayers();
lifecycle().AdvanceTo(LayerTreeLifecycle::kNotSyncing);
}
void LayerTreeImpl::PullPropertyTreesFrom(
CommitState& commit_state,
const ThreadUnsafeCommitState& unsafe_state) {
// Property trees may store damage status. We preserve the sync tree damage
// status by pushing the damage status from sync tree property trees to main
// thread property trees or by moving it onto the layers.
bool preserve_change_tracking = false;
if (unsafe_state.root_layer && IsActiveTree() && property_trees_.changed()) {
if (unsafe_state.property_trees.sequence_number() ==
property_trees_.sequence_number()) {
preserve_change_tracking = true;
} else {
MoveChangeTrackingToLayers();
}
}
SetPropertyTrees(unsafe_state.property_trees,
commit_state.property_trees_change_state,
preserve_change_tracking);
}
void LayerTreeImpl::PullLayerTreePropertiesFrom(CommitState& commit_state) {
set_needs_full_tree_sync(commit_state.needs_full_tree_sync);
if (commit_state.hud_layer_id != Layer::INVALID_ID) {
LayerImpl* hud_impl = LayerById(commit_state.hud_layer_id);
set_hud_layer(static_cast<HeadsUpDisplayLayerImpl*>(hud_impl));
} else {
set_hud_layer(nullptr);
}
set_background_color(commit_state.background_color);
set_have_scroll_event_handlers(commit_state.have_scroll_event_handlers);
set_event_listener_properties(EventListenerClass::kTouchStartOrMove,
commit_state.GetEventListenerProperties(
EventListenerClass::kTouchStartOrMove));
set_event_listener_properties(
EventListenerClass::kMouseWheel,
commit_state.GetEventListenerProperties(EventListenerClass::kMouseWheel));
set_event_listener_properties(EventListenerClass::kTouchEndOrCancel,
commit_state.GetEventListenerProperties(
EventListenerClass::kTouchEndOrCancel));
SetViewportPropertyIds(commit_state.viewport_property_ids);
RegisterSelection(commit_state.selection);
PushPageScaleFromMainThread(commit_state.page_scale_factor,
commit_state.min_page_scale_factor,
commit_state.max_page_scale_factor);
SetBrowserControlsParams(commit_state.browser_controls_params);
set_overscroll_behavior(commit_state.overscroll_behavior);
PushBrowserControlsFromMainThread(commit_state.top_controls_shown_ratio,
commit_state.bottom_controls_shown_ratio);
elastic_overscroll()->PushMainToPending(commit_state.elastic_overscroll);
if (IsActiveTree())
elastic_overscroll()->PushPendingToActive();
SetDisplayColorSpaces(commit_state.display_color_spaces);
SetExternalPageScaleFactor(commit_state.external_page_scale_factor);
set_painted_device_scale_factor(commit_state.painted_device_scale_factor);
SetDeviceScaleFactor(commit_state.device_scale_factor);
SetDeviceViewportRect(commit_state.device_viewport_rect);
if (commit_state.new_local_surface_id_request)
RequestNewLocalSurfaceId();
SetLocalSurfaceIdFromParent(commit_state.local_surface_id_from_parent);
if (commit_state.pending_page_scale_animation) {
SetPendingPageScaleAnimation(
std::move(commit_state.pending_page_scale_animation));
}
if (commit_state.force_send_metadata_request)
RequestForceSendMetadata();
set_display_transform_hint(commit_state.display_transform_hint);
if (commit_state.delegated_ink_metadata)
set_delegated_ink_metadata(std::move(commit_state.delegated_ink_metadata));
else
delegated_ink_metadata_.reset();
// Transfer page transition directives.
for (auto& request : commit_state.view_transition_requests)
AddViewTransitionRequest(std::move(request));
SetVisualUpdateDurations(
commit_state.previous_surfaces_visual_update_duration,
commit_state.visual_update_duration);
}
void LayerTreeImpl::PushPropertyTreesTo(LayerTreeImpl* target_tree) {
TRACE_EVENT0("cc", "LayerTreeImpl::PushPropertyTreesTo");
// Property trees may store damage status. We preserve the active tree
// damage status by pushing the damage status from active tree property
// trees to pending tree property trees or by moving it onto the layers.
bool preserve_change_tracking = false;
if (target_tree->property_trees()->changed()) {
if (property_trees()->sequence_number() ==
target_tree->property_trees()->sequence_number()) {
preserve_change_tracking = true;
} else {
target_tree->MoveChangeTrackingToLayers();
}
}
target_tree->SetPropertyTrees(property_trees_, preserve_change_tracking);
EventMetrics::List events_metrics;
events_metrics.swap(events_metrics_from_main_thread_);
target_tree->AppendEventsMetricsFromMainThread(std::move(events_metrics));
}
void LayerTreeImpl::PushSurfaceRangesTo(LayerTreeImpl* target_tree) {
if (needs_surface_ranges_sync()) {
target_tree->ClearSurfaceRanges();
target_tree->SetSurfaceRanges(SurfaceRanges());
// Reset for next update
set_needs_surface_ranges_sync(false);
}
}
void LayerTreeImpl::PushPropertiesTo(LayerTreeImpl* target_tree) {
TRACE_EVENT0("cc", "LayerTreeImpl::PushPropertiesTo");
// The request queue should have been processed and does not require a push.
DCHECK_EQ(ui_resource_request_queue_.size(), 0u);
PushSurfaceRangesTo(target_tree);
target_tree->property_trees()
->scroll_tree_mutable()
.PushScrollUpdatesFromPendingTree(&property_trees_, target_tree);
if (next_activation_forces_redraw_) {
target_tree->ForceRedrawNextActivation();
next_activation_forces_redraw_ = false;
}
target_tree->PassSwapPromises(std::move(swap_promise_list_));
swap_promise_list_.clear();
// The page scale factor update can affect scrolling which requires that
// these ids are set, so this must be before PushPageScaleFactorAndLimits.
// Setting browser controls below also needs viewport scroll properties.
target_tree->SetViewportPropertyIds(viewport_property_ids_);
// Active tree already shares the page_scale_factor object with pending
// tree so only the limits need to be provided.
target_tree->PushPageScaleFactorAndLimits(nullptr, min_page_scale_factor(),
max_page_scale_factor());
target_tree->SetExternalPageScaleFactor(external_page_scale_factor_);
target_tree->SetBrowserControlsParams(browser_controls_params_);
target_tree->PushBrowserControls(nullptr, nullptr);
target_tree->set_overscroll_behavior(overscroll_behavior_);
target_tree->SetDisplayColorSpaces(display_color_spaces_);
target_tree->elastic_overscroll()->PushPendingToActive();
target_tree->set_painted_device_scale_factor(painted_device_scale_factor());
target_tree->SetDeviceScaleFactor(device_scale_factor());
target_tree->SetDeviceViewportRect(device_viewport_rect_);
if (TakeNewLocalSurfaceIdRequest())
target_tree->RequestNewLocalSurfaceId();
target_tree->SetLocalSurfaceIdFromParent(local_surface_id_from_parent());
target_tree->pending_page_scale_animation_ =
std::move(pending_page_scale_animation_);
if (TakeForceSendMetadataRequest())
target_tree->RequestForceSendMetadata();
target_tree->RegisterSelection(selection_);
// This should match the property synchronization in
// LayerTreeHost::finishCommitOnImplThread().
target_tree->set_source_frame_number(source_frame_number());
target_tree->set_trace_id(trace_id());
target_tree->set_background_color(background_color());
target_tree->set_have_scroll_event_handlers(have_scroll_event_handlers());
target_tree->set_event_listener_properties(
EventListenerClass::kTouchStartOrMove,
event_listener_properties(EventListenerClass::kTouchStartOrMove));
target_tree->set_event_listener_properties(
EventListenerClass::kMouseWheel,
event_listener_properties(EventListenerClass::kMouseWheel));
target_tree->set_event_listener_properties(
EventListenerClass::kTouchEndOrCancel,
event_listener_properties(EventListenerClass::kTouchEndOrCancel));
if (hud_layer())
target_tree->set_hud_layer(static_cast<HeadsUpDisplayLayerImpl*>(
target_tree->LayerById(hud_layer()->id())));
else
target_tree->set_hud_layer(nullptr);
// Note: this needs to happen after SetPropertyTrees.
target_tree->HandleTickmarksVisibilityChange();
target_tree->HandleScrollbarShowRequests();
target_tree->AddPresentationCallbacks(std::move(presentation_callbacks_));
presentation_callbacks_.clear();
target_tree->AddSuccessfulPresentationCallbacks(
std::move(successful_presentation_callbacks_));
successful_presentation_callbacks_.clear();
if (delegated_ink_metadata_) {
TRACE_EVENT_WITH_FLOW1("delegated_ink_trails",
"Delegated ink metadata pushed to tree",
TRACE_ID_GLOBAL(delegated_ink_metadata_->trace_id()),
TRACE_EVENT_FLAG_FLOW_IN | TRACE_EVENT_FLAG_FLOW_OUT,
"metadata", delegated_ink_metadata_->ToString());
target_tree->set_delegated_ink_metadata(std::move(delegated_ink_metadata_));
} else if (target_tree->delegated_ink_metadata()) {
target_tree->clear_delegated_ink_metadata();
}
for (auto& request : TakeViewTransitionRequests())
target_tree->AddViewTransitionRequest(std::move(request));
target_tree->SetVisualUpdateDurations(
previous_surfaces_visual_update_duration_, visual_update_duration_);
}
void LayerTreeImpl::HandleTickmarksVisibilityChange() {
if (!host_impl_->OuterViewportScrollNode())
return;
ScrollbarAnimationController* controller =
host_impl_->ScrollbarAnimationControllerForElementId(
host_impl_->OuterViewportScrollNode()->element_id);
if (!controller)
return;
for (ScrollbarLayerImplBase* scrollbar : controller->Scrollbars()) {
if (scrollbar->orientation() != ScrollbarOrientation::VERTICAL)
continue;
// Android Overlay Scrollbar don't have FindInPage Tickmarks.
if (scrollbar->GetScrollbarAnimator() != LayerTreeSettings::AURA_OVERLAY)
DCHECK(!scrollbar->HasFindInPageTickmarks());
controller->UpdateTickmarksVisibility(scrollbar->HasFindInPageTickmarks());
}
}
void LayerTreeImpl::HandleScrollbarShowRequests() {
for (auto* layer : *this) {
if (!layer->needs_show_scrollbars())
continue;
ScrollbarAnimationController* controller =
host_impl_->ScrollbarAnimationControllerForElementId(
layer->element_id());
if (controller) {
controller->DidRequestShow();
layer->set_needs_show_scrollbars(false);
}
}
}
void LayerTreeImpl::MoveChangeTrackingToLayers() {
// We need to update the change tracking on property trees before we move it
// onto the layers.
property_trees_.UpdateChangeTracking();
for (auto* layer : *this) {
if (layer->LayerPropertyChangedFromPropertyTrees())
layer->NoteLayerPropertyChangedFromPropertyTrees();
}
EffectTree& effect_tree = property_trees_.effect_tree_mutable();
for (int id = kContentsRootPropertyNodeId;
id < static_cast<int>(effect_tree.size()); ++id) {
RenderSurfaceImpl* render_surface = effect_tree.GetRenderSurface(id);
if (render_surface && render_surface->AncestorPropertyChanged())
render_surface->NoteAncestorPropertyChanged();
}
}
void LayerTreeImpl::ForceRecalculateRasterScales() {
for (auto* layer : picture_layers_)
layer->ResetRasterScale();
}
bool LayerTreeImpl::IsElementInPropertyTree(ElementId element_id) const {
return property_trees()->HasElement(element_id);
}
ElementListType LayerTreeImpl::GetElementTypeForAnimation() const {
return IsActiveTree() ? ElementListType::ACTIVE : ElementListType::PENDING;
}
void LayerTreeImpl::SetTransformMutated(ElementId element_id,
const gfx::Transform& transform) {
DCHECK_EQ(1u,
property_trees()->transform_tree().element_id_to_node_index().count(
element_id));
if (IsSyncTree() || IsRecycleTree())
element_id_to_transform_animations_[element_id] = transform;
if (property_trees()->transform_tree_mutable().OnTransformAnimated(element_id,
transform))
set_needs_update_draw_properties();
}
void LayerTreeImpl::SetOpacityMutated(ElementId element_id, float opacity) {
DCHECK_EQ(1u,
property_trees()->effect_tree().element_id_to_node_index().count(
element_id));
if (IsSyncTree() || IsRecycleTree())
element_id_to_opacity_animations_[element_id] = opacity;
if (property_trees()->effect_tree_mutable().OnOpacityAnimated(element_id,
opacity))
set_needs_update_draw_properties();
}
void LayerTreeImpl::SetFilterMutated(ElementId element_id,
const FilterOperations& filters) {
DCHECK_EQ(1u,
property_trees()->effect_tree().element_id_to_node_index().count(
element_id));
if (IsSyncTree() || IsRecycleTree())
element_id_to_filter_animations_[element_id] = filters;
if (property_trees()->effect_tree_mutable().OnFilterAnimated(element_id,
filters))
set_needs_update_draw_properties();
}
void LayerTreeImpl::SetBackdropFilterMutated(
ElementId element_id,
const FilterOperations& backdrop_filters) {
DCHECK_EQ(1u,
property_trees()->effect_tree().element_id_to_node_index().count(
element_id));
if (IsSyncTree() || IsRecycleTree())
element_id_to_backdrop_filter_animations_[element_id] = backdrop_filters;
if (property_trees()->effect_tree_mutable().OnBackdropFilterAnimated(
element_id, backdrop_filters))
set_needs_update_draw_properties();