diff options
Diffstat (limited to 'compositor/FlatteningController.h')
-rw-r--r-- | compositor/FlatteningController.h | 71 |
1 files changed, 71 insertions, 0 deletions
diff --git a/compositor/FlatteningController.h b/compositor/FlatteningController.h new file mode 100644 index 0000000..2be6ce4 --- /dev/null +++ b/compositor/FlatteningController.h @@ -0,0 +1,71 @@ +/* + * Copyright (C) 2023 The Android Open Source Project + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +#pragma once + +#include <chrono> +#include <condition_variable> +#include <functional> +#include <thread> + +namespace android { + +// NOLINTNEXTLINE(misc-unused-using-decls): False positive +using std::chrono_literals::operator""s; + +struct FlatConCallbacks { + std::function<void()> trigger; +}; + +class FlatteningController { + public: + static auto CreateInstance(FlatConCallbacks &cbks) + -> std::shared_ptr<FlatteningController>; + + void Disable() { + auto lock = std::lock_guard<std::mutex>(mutex_); + flatten_next_frame_ = false; + disabled_ = true; + } + + /* Compositor should call this every frame */ + bool NewFrame(); + + auto ShouldFlatten() const { + return flatten_next_frame_; + } + + void StopThread() { + auto lock = std::lock_guard<std::mutex>(mutex_); + cbks_ = {}; + cv_.notify_all(); + } + + static constexpr auto kTimeout = 1s; + + private: + FlatteningController() = default; + static void ThreadFn(const std::shared_ptr<FlatteningController> &fc); + + bool flatten_next_frame_{}; + bool disabled_{}; + decltype(std::chrono::system_clock::now()) sleep_until_{}; + std::mutex mutex_; + std::condition_variable cv_; + FlatConCallbacks cbks_; +}; + +} // namespace android |