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/*
* Copyright 2017 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.
*/
#ifndef ANDROID_SF_HWC2_ON_FB_ADAPTER_H
#define ANDROID_SF_HWC2_ON_FB_ADAPTER_H
#include <condition_variable>
#include <mutex>
#include <string>
#include <thread>
#include <unordered_set>
#include <hardware/hwcomposer2.h>
struct framebuffer_device_t;
namespace android {
class HWC2OnFbAdapter : public hwc2_device_t {
public:
HWC2OnFbAdapter(framebuffer_device_t* fbDevice);
static HWC2OnFbAdapter& cast(hw_device_t* device);
static HWC2OnFbAdapter& cast(hwc2_device_t* device);
static hwc2_display_t getDisplayId();
static hwc2_config_t getConfigId();
void close();
struct Info {
std::string name;
uint32_t width;
uint32_t height;
int format;
int vsync_period_ns;
int xdpi_scaled;
int ydpi_scaled;
};
const Info& getInfo() const;
void updateDebugString();
const std::string& getDebugString() const;
enum class State {
MODIFIED,
VALIDATED_WITH_CHANGES,
VALIDATED,
};
void setState(State state);
State getState() const;
hwc2_layer_t addLayer();
bool removeLayer(hwc2_layer_t layer);
bool hasLayer(hwc2_layer_t layer) const;
bool markLayerDirty(hwc2_layer_t layer, bool dirty);
const std::unordered_set<hwc2_layer_t>& getDirtyLayers() const;
void clearDirtyLayers();
void setBuffer(buffer_handle_t buffer);
bool postBuffer();
void setVsyncCallback(HWC2_PFN_VSYNC callback, hwc2_callback_data_t data);
void enableVsync(bool enable);
private:
framebuffer_device_t* mFbDevice{nullptr};
Info mFbInfo{};
std::string mDebugString;
State mState{State::MODIFIED};
uint64_t mNextLayerId{0};
std::unordered_set<hwc2_layer_t> mLayers;
std::unordered_set<hwc2_layer_t> mDirtyLayers;
buffer_handle_t mBuffer{nullptr};
class VsyncThread {
public:
static int64_t now();
static bool sleepUntil(int64_t t);
void start(int64_t first, int64_t period);
void stop();
void setCallback(HWC2_PFN_VSYNC callback, hwc2_callback_data_t data);
void enableCallback(bool enable);
private:
void vsyncLoop();
bool waitUntilNextVsync();
std::thread mThread;
int64_t mNextVsync{0};
int64_t mPeriod{0};
std::mutex mMutex;
std::condition_variable mCondition;
bool mStarted{false};
HWC2_PFN_VSYNC mCallback{nullptr};
hwc2_callback_data_t mCallbackData{nullptr};
bool mCallbackEnabled{false};
};
VsyncThread mVsyncThread;
};
} // namespace android
#endif // ANDROID_SF_HWC2_ON_FB_ADAPTER_H
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