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205d2b8e18
* Revert "Revert "Set SkPath::setIsVolatile based on whether the path survives at least two frames (#22620)" (#23044)" This reverts commit 4f914253bd7cd2a5cca3fd97213df37494e9bf37. * Fix tracing
75 lines
2.3 KiB
C++
75 lines
2.3 KiB
C++
// Copyright 2013 The Flutter Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include "flutter/lib/ui/volatile_path_tracker.h"
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namespace flutter {
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VolatilePathTracker::VolatilePathTracker(
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fml::RefPtr<fml::TaskRunner> ui_task_runner)
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: ui_task_runner_(ui_task_runner) {}
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void VolatilePathTracker::Insert(std::shared_ptr<TrackedPath> path) {
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FML_DCHECK(ui_task_runner_->RunsTasksOnCurrentThread());
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FML_DCHECK(path);
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FML_DCHECK(path->path.isVolatile());
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paths_.insert(path);
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}
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void VolatilePathTracker::Erase(std::shared_ptr<TrackedPath> path) {
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FML_DCHECK(path);
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if (ui_task_runner_->RunsTasksOnCurrentThread()) {
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paths_.erase(path);
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return;
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}
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std::scoped_lock lock(paths_to_remove_mutex_);
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needs_drain_ = true;
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paths_to_remove_.push_back(path);
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}
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void VolatilePathTracker::OnFrame() {
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FML_DCHECK(ui_task_runner_->RunsTasksOnCurrentThread());
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std::string total_count = std::to_string(paths_.size());
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TRACE_EVENT1("flutter", "VolatilePathTracker::OnFrame", "total_count",
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total_count.c_str());
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Drain();
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std::set<std::shared_ptr<TrackedPath>> surviving_paths_;
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for (const std::shared_ptr<TrackedPath> path : paths_) {
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path->frame_count++;
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if (path->frame_count >= kFramesOfVolatility) {
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path->path.setIsVolatile(false);
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path->tracking_volatility = false;
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} else {
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surviving_paths_.insert(path);
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}
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}
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paths_.swap(surviving_paths_);
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std::string post_removal_count = std::to_string(paths_.size());
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TRACE_EVENT_INSTANT1("flutter", "VolatilePathTracker::OnFrame",
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"remaining_count", post_removal_count.c_str());
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}
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void VolatilePathTracker::Drain() {
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if (needs_drain_) {
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TRACE_EVENT0("flutter", "VolatilePathTracker::Drain");
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std::deque<std::shared_ptr<TrackedPath>> paths_to_remove;
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{
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std::scoped_lock lock(paths_to_remove_mutex_);
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paths_to_remove.swap(paths_to_remove_);
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needs_drain_ = false;
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}
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std::string count = std::to_string(paths_to_remove.size());
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TRACE_EVENT_INSTANT1("flutter", "VolatilePathTracker::Drain", "count",
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count.c_str());
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for (auto path : paths_to_remove) {
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paths_.erase(path);
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}
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}
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}
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} // namespace flutter
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