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layer.cc
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// Copyright 2010 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.h"
#include <stddef.h>
#include <stdint.h>
#include <algorithm>
#include "base/atomic_sequence_num.h"
#include "base/location.h"
#include "base/metrics/histogram.h"
#include "base/single_thread_task_runner.h"
#include "base/time/time.h"
#include "base/trace_event/trace_event.h"
#include "cc/base/simple_enclosed_region.h"
#include "cc/input/main_thread_scrolling_reason.h"
#include "cc/layers/layer_client.h"
#include "cc/layers/layer_impl.h"
#include "cc/layers/scrollbar_layer_interface.h"
#include "cc/tiles/frame_viewer_instrumentation.h"
#include "cc/trees/draw_property_utils.h"
#include "cc/trees/effect_node.h"
#include "cc/trees/layer_tree_host.h"
#include "cc/trees/layer_tree_impl.h"
#include "cc/trees/mutator_host.h"
#include "cc/trees/scroll_node.h"
#include "cc/trees/transform_node.h"
#include "components/viz/common/frame_sinks/copy_output_request.h"
#include "components/viz/common/frame_sinks/copy_output_result.h"
#include "third_party/skia/include/core/SkImageFilter.h"
#include "ui/gfx/geometry/rect_conversions.h"
#include "ui/gfx/geometry/vector2d_conversions.h"
namespace cc {
base::AtomicSequenceNumber g_next_layer_id;
Layer::Inputs::Inputs(int layer_id)
: layer_id(layer_id),
masks_to_bounds(false),
mask_layer(nullptr),
opacity(1.f),
blend_mode(SkBlendMode::kSrcOver),
is_root_for_isolated_group(false),
hit_testable_without_draws_content(false),
contents_opaque(false),
is_drawable(false),
double_sided(true),
should_flatten_transform(true),
sorting_context_id(0),
use_parent_backface_visibility(false),
background_color(0),
scrollable(false),
user_scrollable_horizontal(true),
user_scrollable_vertical(true),
main_thread_scrolling_reasons(
MainThreadScrollingReason::kNotScrollingOnMain),
is_resized_by_browser_controls(false),
is_container_for_fixed_position_layers(false),
scroll_parent(nullptr),
clip_parent(nullptr),
has_will_change_transform_hint(false),
trilinear_filtering(false),
hide_layer_and_subtree(false),
overscroll_behavior(OverscrollBehavior::kOverscrollBehaviorTypeAuto) {}
Layer::Inputs::~Inputs() = default;
scoped_refptr<Layer> Layer::Create() {
return base::WrapRefCounted(new Layer());
}
Layer::Layer()
: ignore_set_needs_commit_(false),
parent_(nullptr),
layer_tree_host_(nullptr),
// Layer IDs start from 1.
inputs_(g_next_layer_id.GetNext() + 1),
num_descendants_that_draw_content_(0),
transform_tree_index_(TransformTree::kInvalidNodeId),
effect_tree_index_(EffectTree::kInvalidNodeId),
clip_tree_index_(ClipTree::kInvalidNodeId),
scroll_tree_index_(ScrollTree::kInvalidNodeId),
property_tree_sequence_number_(-1),
should_flatten_transform_from_property_tree_(false),
draws_content_(false),
should_check_backface_visibility_(false),
cache_render_surface_(false),
force_render_surface_for_testing_(false),
subtree_property_changed_(false),
may_contain_video_(false),
needs_show_scrollbars_(false),
has_transform_node_(false),
subtree_has_copy_request_(false),
safe_opaque_background_color_(0),
num_unclipped_descendants_(0) {}
Layer::~Layer() {
// Our parent should be holding a reference to us so there should be no
// way for us to be destroyed while we still have a parent.
DCHECK(!parent());
// Similarly we shouldn't have a layer tree host since it also keeps a
// reference to us.
DCHECK(!layer_tree_host());
RemoveFromClipTree();
// Remove the parent reference from all children and dependents.
RemoveAllChildren();
if (inputs_.mask_layer.get()) {
DCHECK_EQ(this, inputs_.mask_layer->parent());
inputs_.mask_layer->RemoveFromParent();
}
}
void Layer::SetLayerTreeHost(LayerTreeHost* host) {
if (layer_tree_host_ == host)
return;
if (layer_tree_host_) {
layer_tree_host_->property_trees()->needs_rebuild = true;
layer_tree_host_->UnregisterLayer(this);
if (!layer_tree_host_->IsUsingLayerLists() && inputs_.element_id) {
layer_tree_host_->UnregisterElement(inputs_.element_id,
ElementListType::ACTIVE);
}
}
if (host) {
host->property_trees()->needs_rebuild = true;
host->RegisterLayer(this);
if (!host->IsUsingLayerLists() && inputs_.element_id) {
host->RegisterElement(inputs_.element_id, ElementListType::ACTIVE, this);
}
}
layer_tree_host_ = host;
InvalidatePropertyTreesIndices();
// When changing hosts, the layer needs to commit its properties to the impl
// side for the new host.
SetNeedsPushProperties();
for (size_t i = 0; i < inputs_.children.size(); ++i)
inputs_.children[i]->SetLayerTreeHost(host);
if (inputs_.mask_layer.get())
inputs_.mask_layer->SetLayerTreeHost(host);
if (host && !host->IsUsingLayerLists() &&
GetMutatorHost()->IsElementAnimating(element_id())) {
host->SetNeedsCommit();
}
}
void Layer::SetNeedsCommit() {
if (!layer_tree_host_)
return;
SetNeedsPushProperties();
if (ignore_set_needs_commit_)
return;
layer_tree_host_->SetNeedsCommit();
}
void Layer::SetNeedsFullTreeSync() {
if (!layer_tree_host_)
return;
layer_tree_host_->SetNeedsFullTreeSync();
}
void Layer::SetNextCommitWaitsForActivation() {
if (!layer_tree_host_)
return;
layer_tree_host_->SetNextCommitWaitsForActivation();
}
void Layer::SetNeedsPushProperties() {
if (layer_tree_host_)
layer_tree_host_->AddLayerShouldPushProperties(this);
}
void Layer::ResetNeedsPushPropertiesForTesting() {
if (layer_tree_host_)
layer_tree_host_->RemoveLayerShouldPushProperties(this);
}
bool Layer::IsPropertyChangeAllowed() const {
if (!layer_tree_host_)
return true;
return !layer_tree_host_->in_paint_layer_contents();
}
sk_sp<SkPicture> Layer::GetPicture() const {
return nullptr;
}
void Layer::SetParent(Layer* layer) {
DCHECK(!layer || !layer->HasAncestor(this));
parent_ = layer;
SetLayerTreeHost(parent_ ? parent_->layer_tree_host() : nullptr);
SetPropertyTreesNeedRebuild();
}
void Layer::AddChild(scoped_refptr<Layer> child) {
InsertChild(child, inputs_.children.size());
}
void Layer::InsertChild(scoped_refptr<Layer> child, size_t index) {
DCHECK(IsPropertyChangeAllowed());
child->RemoveFromParent();
AddDrawableDescendants(child->NumDescendantsThatDrawContent() +
(child->DrawsContent() ? 1 : 0));
child->SetParent(this);
child->SetSubtreePropertyChanged();
index = std::min(index, inputs_.children.size());
inputs_.children.insert(inputs_.children.begin() + index, child);
SetNeedsFullTreeSync();
}
void Layer::RemoveFromParent() {
DCHECK(IsPropertyChangeAllowed());
if (parent_)
parent_->RemoveChildOrDependent(this);
}
void Layer::RemoveChildOrDependent(Layer* child) {
if (inputs_.mask_layer.get() == child) {
inputs_.mask_layer->SetParent(nullptr);
inputs_.mask_layer = nullptr;
SetNeedsFullTreeSync();
return;
}
for (LayerList::iterator iter = inputs_.children.begin();
iter != inputs_.children.end(); ++iter) {
if (iter->get() != child)
continue;
child->SetParent(nullptr);
AddDrawableDescendants(-child->NumDescendantsThatDrawContent() -
(child->DrawsContent() ? 1 : 0));
inputs_.children.erase(iter);
SetNeedsFullTreeSync();
return;
}
}
void Layer::ReplaceChild(Layer* reference, scoped_refptr<Layer> new_layer) {
DCHECK(reference);
DCHECK_EQ(reference->parent(), this);
DCHECK(IsPropertyChangeAllowed());
if (reference == new_layer.get())
return;
// Find the index of |reference| in |children_|.
auto reference_it =
std::find_if(inputs_.children.begin(), inputs_.children.end(),
[reference](const scoped_refptr<Layer>& layer) {
return layer.get() == reference;
});
DCHECK(reference_it != inputs_.children.end());
size_t reference_index = reference_it - inputs_.children.begin();
reference->RemoveFromParent();
if (new_layer.get()) {
new_layer->RemoveFromParent();
InsertChild(new_layer, reference_index);
}
}
void Layer::SetBounds(const gfx::Size& size) {
DCHECK(IsPropertyChangeAllowed());
if (bounds() == size)
return;
inputs_.bounds = size;
if (!layer_tree_host_)
return;
// Both bounds clipping and mask clipping can result in new areas of subtrees
// being exposed on a bounds change. Ensure the damaged areas are updated.
if (masks_to_bounds() || inputs_.mask_layer.get()) {
SetSubtreePropertyChanged();
SetPropertyTreesNeedRebuild();
}
if (scrollable()) {
auto& scroll_tree = layer_tree_host_->property_trees()->scroll_tree;
if (auto* scroll_node = scroll_tree.Node(scroll_tree_index_))
scroll_node->bounds = inputs_.bounds;
else
SetPropertyTreesNeedRebuild();
}
SetNeedsCommit();
}
void Layer::SetOverscrollBehavior(const OverscrollBehavior& behavior) {
DCHECK(IsPropertyChangeAllowed());
if (overscroll_behavior() == behavior)
return;
inputs_.overscroll_behavior = behavior;
if (!layer_tree_host_)
return;
if (scrollable()) {
auto& scroll_tree = layer_tree_host_->property_trees()->scroll_tree;
if (auto* scroll_node = scroll_tree.Node(scroll_tree_index_))
scroll_node->overscroll_behavior = behavior;
else
SetPropertyTreesNeedRebuild();
}
SetNeedsCommit();
}
void Layer::SetSnapContainerData(base::Optional<SnapContainerData> data) {
DCHECK(IsPropertyChangeAllowed());
if (snap_container_data() == data)
return;
inputs_.snap_container_data = std::move(data);
if (!layer_tree_host_)
return;
if (scrollable()) {
auto& scroll_tree = layer_tree_host_->property_trees()->scroll_tree;
if (auto* scroll_node = scroll_tree.Node(scroll_tree_index_))
scroll_node->snap_container_data = inputs_.snap_container_data;
else
SetPropertyTreesNeedRebuild();
}
SetNeedsCommit();
}
Layer* Layer::RootLayer() {
Layer* layer = this;
while (layer->parent())
layer = layer->parent();
return layer;
}
void Layer::RemoveAllChildren() {
DCHECK(IsPropertyChangeAllowed());
while (inputs_.children.size()) {
Layer* layer = inputs_.children[0].get();
DCHECK_EQ(this, layer->parent());
layer->RemoveFromParent();
}
}
bool Layer::HasAncestor(const Layer* ancestor) const {
for (const Layer* layer = parent(); layer; layer = layer->parent()) {
if (layer == ancestor)
return true;
}
return false;
}
void Layer::RequestCopyOfOutput(
std::unique_ptr<viz::CopyOutputRequest> request) {
DCHECK(IsPropertyChangeAllowed());
if (request->has_source()) {
const base::UnguessableToken& source = request->source();
auto it = std::find_if(
inputs_.copy_requests.begin(), inputs_.copy_requests.end(),
[&source](const std::unique_ptr<viz::CopyOutputRequest>& x) {
return x->has_source() && x->source() == source;
});
if (it != inputs_.copy_requests.end())
inputs_.copy_requests.erase(it);
}
inputs_.copy_requests.push_back(std::move(request));
SetSubtreePropertyChanged();
SetPropertyTreesNeedRebuild();
SetNeedsCommit();
if (layer_tree_host_)
layer_tree_host_->SetHasCopyRequest(true);
}
void Layer::SetSubtreeHasCopyRequest(bool subtree_has_copy_request) {
subtree_has_copy_request_ = subtree_has_copy_request;
}
bool Layer::SubtreeHasCopyRequest() const {
DCHECK(layer_tree_host_);
// When the copy request is pushed to effect tree, we reset layer tree host's
// has_copy_request but do not clear subtree_has_copy_request on individual
// layers.
return layer_tree_host_->has_copy_request() && subtree_has_copy_request_;
}
void Layer::SetBackgroundColor(SkColor background_color) {
DCHECK(IsPropertyChangeAllowed());
if (inputs_.background_color == background_color)
return;
inputs_.background_color = background_color;
SetPropertyTreesNeedRebuild();
SetNeedsCommit();
}
void Layer::SetSafeOpaqueBackgroundColor(SkColor background_color) {
DCHECK(IsPropertyChangeAllowed());
SkColor opaque_color = SkColorSetA(background_color, 255);
if (safe_opaque_background_color_ == opaque_color)
return;
safe_opaque_background_color_ = opaque_color;
SetNeedsPushProperties();
}
SkColor Layer::SafeOpaqueBackgroundColor() const {
if (contents_opaque())
return safe_opaque_background_color_;
SkColor color = background_color();
if (SkColorGetA(color) == 255)
color = SK_ColorTRANSPARENT;
return color;
}
void Layer::SetMasksToBounds(bool masks_to_bounds) {
DCHECK(IsPropertyChangeAllowed());
if (inputs_.masks_to_bounds == masks_to_bounds)
return;
inputs_.masks_to_bounds = masks_to_bounds;
SetNeedsCommit();
SetPropertyTreesNeedRebuild();
SetSubtreePropertyChanged();
}
void Layer::SetMaskLayer(Layer* mask_layer) {
DCHECK(IsPropertyChangeAllowed());
if (inputs_.mask_layer.get() == mask_layer)
return;
if (inputs_.mask_layer.get()) {
DCHECK_EQ(this, inputs_.mask_layer->parent());
inputs_.mask_layer->RemoveFromParent();
}
inputs_.mask_layer = mask_layer;
if (inputs_.mask_layer.get()) {
// The mask layer should not have any children.
DCHECK(inputs_.mask_layer->children().empty());
inputs_.mask_layer->RemoveFromParent();
DCHECK(!inputs_.mask_layer->parent());
inputs_.mask_layer->SetParent(this);
if (inputs_.filters.IsEmpty() && inputs_.background_filters.IsEmpty() &&
(!layer_tree_host_ ||
layer_tree_host_->GetSettings().enable_mask_tiling)) {
inputs_.mask_layer->SetLayerMaskType(
Layer::LayerMaskType::MULTI_TEXTURE_MASK);
} else {
inputs_.mask_layer->SetLayerMaskType(
Layer::LayerMaskType::SINGLE_TEXTURE_MASK);
}
}
SetSubtreePropertyChanged();
SetNeedsFullTreeSync();
}
void Layer::SetFilters(const FilterOperations& filters) {
DCHECK(IsPropertyChangeAllowed());
if (inputs_.filters == filters)
return;
inputs_.filters = filters;
if (inputs_.mask_layer && !filters.IsEmpty()) {
inputs_.mask_layer->SetLayerMaskType(
Layer::LayerMaskType::SINGLE_TEXTURE_MASK);
}
SetSubtreePropertyChanged();
SetPropertyTreesNeedRebuild();
SetNeedsCommit();
}
void Layer::SetBackgroundFilters(const FilterOperations& filters) {
DCHECK(IsPropertyChangeAllowed());
if (inputs_.background_filters == filters)
return;
inputs_.background_filters = filters;
// We will not set the mask type to MULTI_TEXTURE_MASK if the mask layer's
// filters are removed, because we do not want to reraster if the filters are
// being animated.
if (inputs_.mask_layer && !filters.IsEmpty()) {
inputs_.mask_layer->SetLayerMaskType(
Layer::LayerMaskType::SINGLE_TEXTURE_MASK);
}
SetSubtreePropertyChanged();
SetPropertyTreesNeedRebuild();
SetNeedsCommit();
}
void Layer::SetFiltersOrigin(const gfx::PointF& filters_origin) {
DCHECK(IsPropertyChangeAllowed());
if (inputs_.filters_origin == filters_origin)
return;
inputs_.filters_origin = filters_origin;
SetSubtreePropertyChanged();
SetPropertyTreesNeedRebuild();
SetNeedsCommit();
}
void Layer::SetOpacity(float opacity) {
DCHECK(IsPropertyChangeAllowed());
DCHECK_GE(opacity, 0.f);
DCHECK_LE(opacity, 1.f);
if (inputs_.opacity == opacity)
return;
// We need to force a property tree rebuild when opacity changes from 1 to a
// non-1 value or vice-versa as render surfaces can change.
bool force_rebuild = opacity == 1.f || inputs_.opacity == 1.f;
inputs_.opacity = opacity;
SetSubtreePropertyChanged();
if (layer_tree_host_ && !force_rebuild) {
PropertyTrees* property_trees = layer_tree_host_->property_trees();
if (EffectNode* node =
property_trees->effect_tree.Node(effect_tree_index())) {
node->opacity = opacity;
node->effect_changed = true;
property_trees->effect_tree.set_needs_update(true);
}
}
if (force_rebuild)
SetPropertyTreesNeedRebuild();
SetNeedsCommit();
}
float Layer::EffectiveOpacity() const {
return inputs_.hide_layer_and_subtree ? 0.f : inputs_.opacity;
}
bool Layer::OpacityCanAnimateOnImplThread() const {
return false;
}
void Layer::SetBlendMode(SkBlendMode blend_mode) {
DCHECK(IsPropertyChangeAllowed());
if (inputs_.blend_mode == blend_mode)
return;
// Allowing only blend modes that are defined in the CSS Compositing standard,
// plus destination-in which is used to implement masks.
// http://dev.w3.org/fxtf/compositing-1/#blending
switch (blend_mode) {
case SkBlendMode::kSrcOver:
case SkBlendMode::kDstIn:
case SkBlendMode::kScreen:
case SkBlendMode::kOverlay:
case SkBlendMode::kDarken:
case SkBlendMode::kLighten:
case SkBlendMode::kColorDodge:
case SkBlendMode::kColorBurn:
case SkBlendMode::kHardLight:
case SkBlendMode::kSoftLight:
case SkBlendMode::kDifference:
case SkBlendMode::kExclusion:
case SkBlendMode::kMultiply:
case SkBlendMode::kHue:
case SkBlendMode::kSaturation:
case SkBlendMode::kColor:
case SkBlendMode::kLuminosity:
// supported blend modes
break;
case SkBlendMode::kClear:
case SkBlendMode::kSrc:
case SkBlendMode::kDst:
case SkBlendMode::kDstOver:
case SkBlendMode::kSrcIn:
case SkBlendMode::kSrcOut:
case SkBlendMode::kDstOut:
case SkBlendMode::kSrcATop:
case SkBlendMode::kDstATop:
case SkBlendMode::kXor:
case SkBlendMode::kPlus:
case SkBlendMode::kModulate:
// Porter Duff Compositing Operators are not yet supported
// http://dev.w3.org/fxtf/compositing-1/#porterduffcompositingoperators
NOTREACHED();
return;
}
inputs_.blend_mode = blend_mode;
SetNeedsCommit();
SetSubtreePropertyChanged();
SetPropertyTreesNeedRebuild();
}
void Layer::SetIsRootForIsolatedGroup(bool root) {
DCHECK(IsPropertyChangeAllowed());
if (inputs_.is_root_for_isolated_group == root)
return;
inputs_.is_root_for_isolated_group = root;
SetPropertyTreesNeedRebuild();
SetNeedsCommit();
}
void Layer::SetHitTestableWithoutDrawsContent(bool should_hit_test) {
DCHECK(IsPropertyChangeAllowed());
if (inputs_.hit_testable_without_draws_content == should_hit_test)
return;
inputs_.hit_testable_without_draws_content = should_hit_test;
SetPropertyTreesNeedRebuild();
SetNeedsCommit();
}
void Layer::SetContentsOpaque(bool opaque) {
DCHECK(IsPropertyChangeAllowed());
if (inputs_.contents_opaque == opaque)
return;
inputs_.contents_opaque = opaque;
SetNeedsCommit();
SetSubtreePropertyChanged();
SetPropertyTreesNeedRebuild();
}
void Layer::SetPosition(const gfx::PointF& position) {
DCHECK(IsPropertyChangeAllowed());
if (inputs_.position == position)
return;
inputs_.position = position;
if (!layer_tree_host_)
return;
SetSubtreePropertyChanged();
TransformNode* transform_node = GetTransformNode();
if (transform_node) {
transform_node->update_post_local_transform(position, transform_origin());
transform_node->needs_local_transform_update = true;
transform_node->transform_changed = true;
layer_tree_host_->property_trees()->transform_tree.set_needs_update(true);
} else {
SetPropertyTreesNeedRebuild();
}
SetNeedsCommit();
}
bool Layer::IsContainerForFixedPositionLayers() const {
return inputs_.is_container_for_fixed_position_layers;
}
bool Are2dAxisAligned(const gfx::Transform& a, const gfx::Transform& b) {
if (a.IsScaleOrTranslation() && b.IsScaleOrTranslation()) {
return true;
}
gfx::Transform inverse(gfx::Transform::kSkipInitialization);
if (b.GetInverse(&inverse)) {
inverse *= a;
return inverse.Preserves2dAxisAlignment();
} else {
// TODO(weiliangc): Should return false because b is not invertible.
return a.Preserves2dAxisAlignment();
}
}
void Layer::SetTransform(const gfx::Transform& transform) {
DCHECK(IsPropertyChangeAllowed());
if (inputs_.transform == transform)
return;
SetSubtreePropertyChanged();
if (layer_tree_host_) {
if (has_transform_node_) {
PropertyTrees* property_trees = layer_tree_host_->property_trees();
if (TransformNode* transform_node =
property_trees->transform_tree.Node(transform_tree_index())) {
// We need to trigger a rebuild if we could have affected 2d axis
// alignment. We'll check to see if transform and inputs_.transform are
// axis align with respect to one another.
DCHECK_EQ(transform_tree_index(), transform_node->id);
bool preserves_2d_axis_alignment =
Are2dAxisAligned(inputs_.transform, transform);
transform_node->local = transform;
transform_node->needs_local_transform_update = true;
transform_node->transform_changed = true;
layer_tree_host_->property_trees()->transform_tree.set_needs_update(
true);
if (!preserves_2d_axis_alignment)
SetPropertyTreesNeedRebuild();
}
} else {
SetPropertyTreesNeedRebuild();
}
}
inputs_.transform = transform;
SetNeedsCommit();
}
void Layer::SetTransformOrigin(const gfx::Point3F& transform_origin) {
DCHECK(IsPropertyChangeAllowed());
if (inputs_.transform_origin == transform_origin)
return;
inputs_.transform_origin = transform_origin;
if (!layer_tree_host_)
return;
SetSubtreePropertyChanged();
TransformNode* transform_node = GetTransformNode();
if (transform_node) {
DCHECK_EQ(transform_tree_index(), transform_node->id);
transform_node->update_pre_local_transform(transform_origin);
transform_node->update_post_local_transform(position(), transform_origin);
transform_node->needs_local_transform_update = true;
transform_node->transform_changed = true;
layer_tree_host_->property_trees()->transform_tree.set_needs_update(true);
} else {
SetPropertyTreesNeedRebuild();
}
SetNeedsCommit();
}
bool Layer::ScrollOffsetAnimationWasInterrupted() const {
return GetMutatorHost()->ScrollOffsetAnimationWasInterrupted(element_id());
}
void Layer::SetScrollParent(Layer* parent) {
DCHECK(IsPropertyChangeAllowed());
if (inputs_.scroll_parent == parent)
return;
inputs_.scroll_parent = parent;
SetPropertyTreesNeedRebuild();
SetNeedsCommit();
}
void Layer::SetClipParent(Layer* ancestor) {
DCHECK(IsPropertyChangeAllowed());
if (inputs_.clip_parent == ancestor)
return;
if (inputs_.clip_parent)
inputs_.clip_parent->RemoveClipChild(this);
inputs_.clip_parent = ancestor;
if (inputs_.clip_parent)
inputs_.clip_parent->AddClipChild(this);
SetPropertyTreesNeedRebuild();
SetNeedsCommit();
}
void Layer::AddClipChild(Layer* child) {
if (!clip_children_)
clip_children_.reset(new std::set<Layer*>);
clip_children_->insert(child);
SetNeedsCommit();
}
void Layer::RemoveClipChild(Layer* child) {
clip_children_->erase(child);
if (clip_children_->empty())
clip_children_ = nullptr;
SetNeedsCommit();
}
void Layer::SetScrollOffset(const gfx::ScrollOffset& scroll_offset) {
DCHECK(IsPropertyChangeAllowed());
if (inputs_.scroll_offset == scroll_offset)
return;
inputs_.scroll_offset = scroll_offset;
if (!layer_tree_host_)
return;
UpdateScrollOffset(scroll_offset);
SetNeedsCommit();
}
void Layer::SetScrollOffsetFromImplSide(
const gfx::ScrollOffset& scroll_offset) {
DCHECK(IsPropertyChangeAllowed());
// This function only gets called during a BeginMainFrame, so there
// is no need to call SetNeedsUpdate here.
DCHECK(layer_tree_host_ && layer_tree_host_->CommitRequested());
if (inputs_.scroll_offset == scroll_offset)
return;
inputs_.scroll_offset = scroll_offset;
SetNeedsPushProperties();
UpdateScrollOffset(scroll_offset);
if (!inputs_.did_scroll_callback.is_null())
inputs_.did_scroll_callback.Run(scroll_offset, element_id());
// The callback could potentially change the layer structure:
// "this" may have been destroyed during the process.
}
void Layer::UpdateScrollOffset(const gfx::ScrollOffset& scroll_offset) {
DCHECK(scrollable());
if (scroll_tree_index() == ScrollTree::kInvalidNodeId) {
// Ensure the property trees just have not been built yet but are marked for
// being built which will set the correct scroll offset values.
DCHECK(layer_tree_host_->property_trees()->needs_rebuild);
return;
}
// If a scroll node exists, it should have an associated transform node.
DCHECK(transform_tree_index() != TransformTree::kInvalidNodeId);
auto& property_trees = *layer_tree_host_->property_trees();
property_trees.scroll_tree.SetScrollOffset(element_id(), scroll_offset);
auto* transform_node =
property_trees.transform_tree.Node(transform_tree_index());
DCHECK_EQ(transform_tree_index(), transform_node->id);
transform_node->scroll_offset = CurrentScrollOffset();
transform_node->needs_local_transform_update = true;
property_trees.transform_tree.set_needs_update(true);
}
void Layer::SetScrollable(const gfx::Size& bounds) {
DCHECK(IsPropertyChangeAllowed());
if (inputs_.scrollable && inputs_.scroll_container_bounds == bounds)
return;
bool was_scrollable = inputs_.scrollable;
inputs_.scrollable = true;
inputs_.scroll_container_bounds = bounds;
if (!layer_tree_host_)
return;
auto& scroll_tree = layer_tree_host_->property_trees()->scroll_tree;
auto* scroll_node = scroll_tree.Node(scroll_tree_index_);
if (was_scrollable && scroll_node)
scroll_node->container_bounds = inputs_.scroll_container_bounds;
else
SetPropertyTreesNeedRebuild();
SetNeedsCommit();
}
void Layer::SetUserScrollable(bool horizontal, bool vertical) {
DCHECK(IsPropertyChangeAllowed());
if (inputs_.user_scrollable_horizontal == horizontal &&
inputs_.user_scrollable_vertical == vertical)
return;
inputs_.user_scrollable_horizontal = horizontal;
inputs_.user_scrollable_vertical = vertical;
if (!layer_tree_host_)
return;
if (scrollable()) {
auto& scroll_tree = layer_tree_host_->property_trees()->scroll_tree;
if (auto* scroll_node = scroll_tree.Node(scroll_tree_index_)) {
scroll_node->user_scrollable_horizontal = horizontal;
scroll_node->user_scrollable_vertical = vertical;
} else {
SetPropertyTreesNeedRebuild();
}
}
SetNeedsCommit();
}
void Layer::AddMainThreadScrollingReasons(
uint32_t main_thread_scrolling_reasons) {
DCHECK(IsPropertyChangeAllowed());
DCHECK(main_thread_scrolling_reasons);
// Layer should only see non-transient scrolling reasons. Transient scrolling
// reasons are computed per hit test.
DCHECK(MainThreadScrollingReason::MainThreadCanSetScrollReasons(
main_thread_scrolling_reasons));
uint32_t new_reasons =
inputs_.main_thread_scrolling_reasons | main_thread_scrolling_reasons;
if (inputs_.main_thread_scrolling_reasons == new_reasons)
return;
inputs_.main_thread_scrolling_reasons = new_reasons;
SetPropertyTreesNeedRebuild();
SetNeedsCommit();
}
void Layer::ClearMainThreadScrollingReasons(
uint32_t main_thread_scrolling_reasons_to_clear) {
DCHECK(IsPropertyChangeAllowed());
DCHECK(main_thread_scrolling_reasons_to_clear);
uint32_t new_reasons = ~main_thread_scrolling_reasons_to_clear &
inputs_.main_thread_scrolling_reasons;
if (new_reasons == inputs_.main_thread_scrolling_reasons)
return;
inputs_.main_thread_scrolling_reasons = new_reasons;
SetPropertyTreesNeedRebuild();
SetNeedsCommit();
}
void Layer::SetNonFastScrollableRegion(const Region& region) {
DCHECK(IsPropertyChangeAllowed());
if (inputs_.non_fast_scrollable_region == region)
return;
inputs_.non_fast_scrollable_region = region;
SetPropertyTreesNeedRebuild();
SetNeedsCommit();
}
void Layer::SetTouchActionRegion(TouchActionRegion touch_action_region) {
DCHECK(IsPropertyChangeAllowed());
if (inputs_.touch_action_region == touch_action_region)
return;
inputs_.touch_action_region = std::move(touch_action_region);
SetPropertyTreesNeedRebuild();
SetNeedsCommit();
}
void Layer::SetCacheRenderSurface(bool cache) {
DCHECK(IsPropertyChangeAllowed());
if (cache_render_surface_ == cache)
return;
cache_render_surface_ = cache;
SetPropertyTreesNeedRebuild();
SetNeedsCommit();
}
void Layer::SetForceRenderSurfaceForTesting(bool force) {
DCHECK(IsPropertyChangeAllowed());
if (force_render_surface_for_testing_ == force)
return;
force_render_surface_for_testing_ = force;
SetPropertyTreesNeedRebuild();
SetNeedsCommit();
}
void Layer::SetDoubleSided(bool double_sided) {
DCHECK(IsPropertyChangeAllowed());
if (inputs_.double_sided == double_sided)
return;
inputs_.double_sided = double_sided;
SetNeedsCommit();
SetPropertyTreesNeedRebuild();
SetSubtreePropertyChanged();
}
void Layer::Set3dSortingContextId(int id) {
DCHECK(IsPropertyChangeAllowed());
if (id == inputs_.sorting_context_id)
return;
inputs_.sorting_context_id = id;
SetNeedsCommit();
SetPropertyTreesNeedRebuild();
SetSubtreePropertyChanged();
}
void Layer::SetTransformTreeIndex(int index) {
DCHECK(IsPropertyChangeAllowed());
if (transform_tree_index_ == index)
return;
if (index == TransformTree::kInvalidNodeId)
has_transform_node_ = false;
transform_tree_index_ = index;
SetNeedsPushProperties();
}
int Layer::transform_tree_index() const {
if (!layer_tree_host_ ||
layer_tree_host_->property_trees()->sequence_number !=
property_tree_sequence_number_) {
return TransformTree::kInvalidNodeId;
}
return transform_tree_index_;
}
void Layer::SetClipTreeIndex(int index) {
DCHECK(IsPropertyChangeAllowed());
if (clip_tree_index_ == index)
return;
clip_tree_index_ = index;
SetNeedsPushProperties();
}
int Layer::clip_tree_index() const {
if (!layer_tree_host_ ||
layer_tree_host_->property_trees()->sequence_number !=
property_tree_sequence_number_) {
return ClipTree::kInvalidNodeId;
}
return clip_tree_index_;
}
void Layer::SetEffectTreeIndex(int index) {
DCHECK(IsPropertyChangeAllowed());