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// Copyright 2017 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "components/viz/service/hit_test/hit_test_aggregator.h"
#include "base/trace_event/trace_event.h"
#include "components/viz/common/hit_test/hit_test_region_list.h"
#include "components/viz/service/hit_test/hit_test_aggregator_delegate.h"
#include "components/viz/service/surfaces/latest_local_surface_id_lookup_delegate.h"
#include "ui/gfx/geometry/rect_conversions.h"
namespace viz {
HitTestAggregator::HitTestAggregator(
const HitTestManager* hit_test_manager,
HitTestAggregatorDelegate* delegate,
LatestLocalSurfaceIdLookupDelegate* local_surface_id_lookup_delegate,
const FrameSinkId& frame_sink_id,
uint32_t initial_region_size,
uint32_t max_region_size)
: hit_test_manager_(hit_test_manager),
delegate_(delegate),
local_surface_id_lookup_delegate_(local_surface_id_lookup_delegate),
root_frame_sink_id_(frame_sink_id),
initial_region_size_(initial_region_size),
incremental_region_size_(initial_region_size),
max_region_size_(max_region_size) {}
HitTestAggregator::~HitTestAggregator() = default;
void HitTestAggregator::Aggregate(const SurfaceId& display_surface_id) {
DCHECK(referenced_child_regions_.empty());
// The index will only have changed when new hit-test data has been submitted.
uint64_t submit_hit_test_region_list_index =
hit_test_manager_->submit_hit_test_region_list_index();
if (submit_hit_test_region_list_index ==
last_submit_hit_test_region_list_index_) {
return;
}
last_submit_hit_test_region_list_index_ = submit_hit_test_region_list_index;
// Reset states.
hit_test_data_.clear();
hit_test_data_capacity_ = initial_region_size_;
hit_test_data_size_ = 0;
hit_test_data_.resize(hit_test_data_capacity_);
AppendRoot(display_surface_id);
SendHitTestData();
}
const std::vector<AggregatedHitTestRegion>& HitTestAggregator::GetHitTestData()
const {
return hit_test_data_;
}
void HitTestAggregator::SendHitTestData() {
hit_test_data_.resize(hit_test_data_size_);
delegate_->OnAggregatedHitTestRegionListUpdated(root_frame_sink_id_,
hit_test_data_);
}
std::optional<int64_t> HitTestAggregator::GetTraceIdIfUpdated(
const SurfaceId& surface_id,
uint64_t active_frame_index) {
bool enabled;
TRACE_EVENT_CATEGORY_GROUP_ENABLED(
TRACE_DISABLED_BY_DEFAULT("viz.hit_testing_flow"), &enabled);
if (!enabled)
return std::nullopt;
uint64_t& frame_index = last_active_frame_index_[surface_id.frame_sink_id()];
if (frame_index == active_frame_index)
return std::nullopt;
frame_index = active_frame_index;
return ~hit_test_manager_->GetTraceId(surface_id);
}
void HitTestAggregator::AppendRoot(const SurfaceId& surface_id) {
uint64_t active_frame_index;
const HitTestRegionList* hit_test_region_list =
hit_test_manager_->GetActiveHitTestRegionList(
local_surface_id_lookup_delegate_, surface_id.frame_sink_id(),
&active_frame_index);
if (!hit_test_region_list)
return;
std::optional<int64_t> trace_id =
GetTraceIdIfUpdated(surface_id, active_frame_index);
TRACE_EVENT_WITH_FLOW1(
TRACE_DISABLED_BY_DEFAULT("viz.hit_testing_flow"), "Event.Pipeline",
TRACE_ID_GLOBAL(trace_id.value_or(-1)),
trace_id ? TRACE_EVENT_FLAG_FLOW_IN : TRACE_EVENT_FLAG_NONE, "step",
"AggregateHitTestData(Root)");
DCHECK(referenced_child_regions_.empty());
referenced_child_regions_.insert(surface_id.frame_sink_id());
size_t region_index = 1;
for (const auto& region : hit_test_region_list->regions) {
if (region_index >= hit_test_data_capacity_ - 1)
break;
region_index = AppendRegion(region_index, region);
DCHECK_EQ(referenced_child_regions_.size(), 1u);
}
referenced_child_regions_.erase(referenced_child_regions_.begin());
DCHECK_GE(region_index, 1u);
int32_t child_count = region_index - 1;
SetRegionAt(0, surface_id.frame_sink_id(), hit_test_region_list->flags,
hit_test_region_list->async_hit_test_reasons,
hit_test_region_list->bounds, hit_test_region_list->transform,
child_count);
}
size_t HitTestAggregator::AppendRegion(size_t region_index,
const HitTestRegion& region) {
size_t parent_index = region_index++;
if (region_index >= hit_test_data_capacity_ - 1) {
if (hit_test_data_capacity_ > max_region_size_) {
return region_index;
} else {
hit_test_data_capacity_ += incremental_region_size_;
hit_test_data_.resize(hit_test_data_capacity_);
}
}
uint32_t flags = region.flags;
uint32_t reasons = region.async_hit_test_reasons;
gfx::Transform transform = region.transform;
if (region.flags & HitTestRegionFlags::kHitTestChildSurface) {
if (referenced_child_regions_.count(region.frame_sink_id))
return parent_index;
referenced_child_regions_.insert(region.frame_sink_id);
uint64_t active_frame_index;
const HitTestRegionList* hit_test_region_list =
hit_test_manager_->GetActiveHitTestRegionList(
local_surface_id_lookup_delegate_, region.frame_sink_id,
&active_frame_index);
if (!hit_test_region_list) {
// Hit-test data not found with this FrameSinkId. This means that it
// failed to find a surface corresponding to this FrameSinkId at surface
// aggregation time. This might be because the embedded client hasn't
// submitted its own hit-test data yet, we are going to do async
// targeting for this embedded client.
flags |= (HitTestRegionFlags::kHitTestAsk |
HitTestRegionFlags::kHitTestNotActive);
reasons |= AsyncHitTestReasons::kRegionNotActive;
} else {
// Rather than add a node in the tree for this hit_test_region_list
// element we can simplify the tree by merging the flags and transform
// into the kHitTestChildSurface element.
if (!hit_test_region_list->transform.IsIdentity())
transform.PreConcat(hit_test_region_list->transform);
flags |= hit_test_region_list->flags;
reasons |= hit_test_region_list->async_hit_test_reasons;
bool enabled;
TRACE_EVENT_CATEGORY_GROUP_ENABLED(
TRACE_DISABLED_BY_DEFAULT("viz.hit_testing_flow"), &enabled);
if (enabled) {
// Preconditions are already verified in GetActiveHitTestRegionList.
LocalSurfaceId local_surface_id =
local_surface_id_lookup_delegate_->GetSurfaceAtAggregation(
region.frame_sink_id);
SurfaceId surface_id(region.frame_sink_id, local_surface_id);
std::optional<int64_t> trace_id =
GetTraceIdIfUpdated(surface_id, active_frame_index);
TRACE_EVENT_WITH_FLOW1(
TRACE_DISABLED_BY_DEFAULT("viz.hit_testing_flow"), "Event.Pipeline",
TRACE_ID_GLOBAL(trace_id.value_or(-1)),
trace_id ? TRACE_EVENT_FLAG_FLOW_IN : TRACE_EVENT_FLAG_NONE, "step",
"AggregateHitTestData");
}
for (const auto& child_region : hit_test_region_list->regions) {
region_index = AppendRegion(region_index, child_region);
if (region_index >= hit_test_data_capacity_ - 1)
break;
}
}
referenced_child_regions_.erase(region.frame_sink_id);
}
DCHECK_GE(region_index - parent_index - 1, 0u);
int32_t child_count = region_index - parent_index - 1;
SetRegionAt(parent_index, region.frame_sink_id, flags, reasons, region.rect,
transform, child_count);
return region_index;
}
void HitTestAggregator::SetRegionAt(size_t index,
const FrameSinkId& frame_sink_id,
uint32_t flags,
uint32_t async_hit_test_reasons,
const gfx::Rect& rect,
const gfx::Transform& transform,
int32_t child_count) {
hit_test_data_[index] =
AggregatedHitTestRegion(frame_sink_id, flags, rect, transform,
child_count, async_hit_test_reasons);
hit_test_data_size_++;
}
} // namespace viz
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