/*
* Copyright (C) 2007 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_SURFACE_FLINGER_H
#define ANDROID_SURFACE_FLINGER_H
#include <memory>
#include <stdint.h>
#include <sys/types.h>
#include <EGL/egl.h>
/*
* NOTE: Make sure this file doesn't include anything from <gl/ > or <gl2/ >
*/
#include <cutils/compiler.h>
#include <utils/Atomic.h>
#include <utils/Errors.h>
#include <utils/KeyedVector.h>
#include <utils/RefBase.h>
#include <utils/SortedVector.h>
#include <utils/threads.h>
#include <ui/FenceTime.h>
#include <ui/PixelFormat.h>
#include <math/mat4.h>
#include <gui/FrameTimestamps.h>
#include <gui/ISurfaceComposer.h>
#include <gui/ISurfaceComposerClient.h>
#include <gui/OccupancyTracker.h>
#include <hardware/hwcomposer_defs.h>
#include <system/graphics.h>
#include <private/gui/LayerState.h>
#include "Barrier.h"
#include "DisplayDevice.h"
#include "DispSync.h"
#include "FrameTracker.h"
#include "LayerVector.h"
#include "MessageQueue.h"
#include "SurfaceInterceptor.h"
#include "StartBootAnimThread.h"
#include "DisplayHardware/HWComposer.h"
#include "Effects/Daltonizer.h"
#include <map>
#include <mutex>
#include <queue>
#include <string>
#include <utility>
namespace android {
// ---------------------------------------------------------------------------
class Client;
class DisplayEventConnection;
class EventThread;
class Layer;
class LayerDim;
class Surface;
class RenderEngine;
class EventControlThread;
class VSyncSource;
class InjectVSyncSource;
namespace dvr {
class VrFlinger;
} // namespace dvr
// ---------------------------------------------------------------------------
enum {
eTransactionNeeded = 0x01,
eTraversalNeeded = 0x02,
eDisplayTransactionNeeded = 0x04,
eTransactionMask = 0x07
};
class SurfaceFlinger : public BnSurfaceComposer,
private IBinder::DeathRecipient,
private HWComposer::EventHandler
{
public:
// This is the phase offset in nanoseconds of the software vsync event
// relative to the vsync event reported by HWComposer. The software vsync
// event is when SurfaceFlinger and Choreographer-based applications run each
// frame.
//
// This phase offset allows adjustment of the minimum latency from application
// wake-up time (by Choreographer) to the time at which the resulting window
// image is displayed. This value may be either positive (after the HW vsync)
// or negative (before the HW vsync). Setting it to 0 will result in a lower
// latency bound of two vsync periods because the app and SurfaceFlinger
// will run just after the HW vsync. Setting it to a positive number will
// result in the minimum latency being:
//
// (2 * VSYNC_PERIOD - (vsyncPhaseOffsetNs % VSYNC_PERIOD))
//
// Note that reducing this latency makes it more likely for the applications
// to not have their window content image ready in time. When this happens
// the latency will end up being an additional vsync period, and animations
// will hiccup. Therefore, this latency should be tuned somewhat
// conservatively (or at least with awareness of the trade-off being made).
static int64_t vsyncPhaseOffsetNs;
static int64_t sfVsyncPhaseOffsetNs;
// If fences from sync Framework are supported.
static bool hasSyncFramework;
// Instruct the Render Engine to use EGL_IMG_context_priority is available.
static bool useContextPriority;
// The offset in nanoseconds to use when DispSync timestamps present fence
// signaling time.
static int64_t dispSyncPresentTimeOffset;
// Some hardware can do RGB->YUV conversion more efficiently in hardware
// controlled by HWC than in hardware controlled by the video encoder.
// This instruct VirtualDisplaySurface to use HWC for such conversion on
// GL composition.
static bool useHwcForRgbToYuv;
// Maximum dimension supported by HWC for virtual display.
// Equal to min(max_height, max_width).
static uint64_t maxVirtualDisplaySize;
// Controls the number of buffers SurfaceFlinger will allocate for use in
// FramebufferSurface
static int64_t maxFrameBufferAcquiredBuffers;
// Indicate if platform supports color management on its
// wide-color display. This is typically found on devices
// with wide gamut (e.g. Display-P3) display.
// This also allows devices with wide-color displays that don't
// want to support color management to disable color management.
static bool hasWideColorDisplay;
static char const* getServiceName() ANDROID_API {
return "SurfaceFlinger";
}
SurfaceFlinger() ANDROID_API;
// must be called before clients can connect
void init() ANDROID_API;
// starts SurfaceFlinger main loop in the current thread
void run() ANDROID_API;
enum {
EVENT_VSYNC = HWC_EVENT_VSYNC
};
// post an asynchronous message to the main thread
status_t postMessageAsync(const sp<MessageBase>& msg, nsecs_t reltime = 0, uint32_t flags = 0);
// post a synchronous message to the main thread
status_t postMessageSync(const sp<MessageBase>& msg, nsecs_t reltime = 0, uint32_t flags = 0);
// force full composition on all displays
void repaintEverything();
// returns the default Display
sp<const DisplayDevice> getDefaultDisplayDevice() const {
Mutex::Autolock _l(mStateLock);
return getDefaultDisplayDeviceLocked();
}
// utility function to delete a texture on the main thread
void deleteTextureAsync(uint32_t texture);
// enable/disable h/w composer event
// TODO: this should be made accessible only to EventThread
#ifdef USE_HWC2
void setVsyncEnabled(int disp, int enabled);
#else
void eventControl(int disp, int event, int enabled);
#endif
// called on the main thread by MessageQueue when an internal message
// is received
// TODO: this should be made accessible only to MessageQueue
void onMessageReceived(int32_t what);
// for debugging only
// TODO: this should be made accessible only to HWComposer
const Vector< sp<Layer> >& getLayerSortedByZForHwcDisplay(int id);
RenderEngine& getRenderEngine() const {
return *mRenderEngine;
}
bool authenticateSurfaceTextureLocked(
const sp<IGraphicBufferProducer>& bufferProducer) const;
private:
friend class Client;
friend class DisplayEventConnection;
friend class EventThread;
friend class Layer;
friend class MonitoredProducer;
// This value is specified in number of frames. Log frame stats at most
// every half hour.
enum { LOG_FRAME_STATS_PERIOD = 30*60*60 };
static const size_t MAX_LAYERS = 4096;
static constexpr const char* kTimestampProperty = "service.sf.present_timestamp";
// We're reference counted, never destroy SurfaceFlinger directly
virtual ~SurfaceFlinger();
/* ------------------------------------------------------------------------
* Internal data structures
*/
class State {
public:
explicit State(LayerVector::StateSet set) : stateSet(set) {}
State& operator=(const State& other) {
// We explicitly don't copy stateSet so that, e.g., mDrawingState
// always uses the Drawing StateSet.
layersSortedByZ = other.layersSortedByZ;
displays = other.displays;
return *this;
}
const LayerVector::StateSet stateSet = LayerVector::StateSet::Invalid;
LayerVector layersSortedByZ;
DefaultKeyedVector< wp<IBinder>, DisplayDeviceState> displays;
void traverseInZOrder(const LayerVector::Visitor& visitor) const;
void traverseInReverseZOrder(const LayerVector::Visitor& visitor) const;
};
/* ------------------------------------------------------------------------
* IBinder interface
*/
virtual status_t onTransact(uint32_t code, const Parcel& data,
Parcel* reply, uint32_t flags);
virtual status_t dump(int fd, const Vector<String16>& args);
/* ------------------------------------------------------------------------
* ISurfaceComposer interface
*/
virtual sp<ISurfaceComposerClient> createConnection();
virtual sp<ISurfaceComposerClient> createScopedConnection(const sp<IGraphicBufferProducer>& gbp);
virtual sp<IBinder> createDisplay(const String8& displayName, bool secure);
virtual void destroyDisplay(const sp<IBinder>& display);
virtual sp<IBinder> getBuiltInDisplay(int32_t id);
virtual void setTransactionState(const Vector<ComposerState>& state,
const Vector<DisplayState>& displays, uint32_t flags);
virtual void bootFinished();
virtual bool authenticateSurfaceTexture(
const sp<IGraphicBufferProducer>& bufferProducer) const;
virtual status_t getSupportedFrameTimestamps(
std::vector<FrameEvent>* outSupported) const;
virtual sp<IDisplayEventConnection> createDisplayEventConnection();
virtual status_t captureScreen(const sp<IBinder>& display,
const sp<IGraphicBufferProducer>& producer,
Rect sourceCrop, uint32_t reqWidth, uint32_t reqHeight,
int32_t minLayerZ, int32_t maxLayerZ,
bool useIdentityTransform, ISurfaceComposer::Rotation rotation);
virtual status_t getDisplayStats(const sp<IBinder>& display,
DisplayStatInfo* stats);
virtual status_t getDisplayConfigs(const sp<IBinder>& display,
Vector<DisplayInfo>* configs);
virtual int getActiveConfig(const sp<IBinder>& display);
virtual status_t getDisplayColorModes(const sp<IBinder>& display,
Vector<android_color_mode_t>* configs);
virtual android_color_mode_t getActiveColorMode(const sp<IBinder>& display);
virtual status_t setActiveColorMode(const sp<IBinder>& display, android_color_mode_t colorMode);
virtual void setPowerMode(const sp<IBinder>& display, int mode);
virtual status_t setActiveConfig(const sp<IBinder>& display, int id);
virtual status_t clearAnimationFrameStats();
virtual status_t getAnimationFrameStats(FrameStats* outStats) const;
virtual status_t getHdrCapabilities(const sp<IBinder>& display,
HdrCapabilities* outCapabilities) const;
virtual status_t enableVSyncInjections(bool enable);
virtual status_t injectVSync(nsecs_t when);
/* ------------------------------------------------------------------------
* DeathRecipient interface
*/
virtual void binderDied(const wp<IBinder>& who);
/* ------------------------------------------------------------------------
* RefBase interface
*/
virtual void onFirstRef();
/* ------------------------------------------------------------------------
* HWComposer::EventHandler interface
*/
virtual void onVSyncReceived(HWComposer* composer, int type, nsecs_t timestamp);
virtual void onHotplugReceived(HWComposer* composer, int disp, bool connected);
virtual void onInvalidateReceived(HWComposer* composer);
/* ------------------------------------------------------------------------
* Message handling
*/
void waitForEvent();
void signalTransaction();
void signalLayerUpdate();
void signalRefresh();
// called on the main thread in response to initializeDisplays()
void onInitializeDisplays();
// called on the main thread in response to setActiveConfig()
void setActiveConfigInternal(const sp<DisplayDevice>& hw, int mode);
// called on the main thread in response to setPowerMode()
void setPowerModeInternal(const sp<DisplayDevice>& hw, int mode);
// Called on the main thread in response to setActiveColorMode()
void setActiveColorModeInternal(const sp<DisplayDevice>& hw, android_color_mode_t colorMode);
// Returns whether the transaction actually modified any state
bool handleMessageTransaction();
// Returns whether a new buffer has been latched (see handlePageFlip())
bool handleMessageInvalidate();
void handleMessageRefresh();
void handleTransaction(uint32_t transactionFlags);
void handleTransactionLocked(uint32_t transactionFlags);
void updateCursorAsync();
/* handlePageFlip - latch a new buffer if available and compute the dirty
* region. Returns whether a new buffer has been latched, i.e., whether it
* is necessary to perform a refresh during this vsync.
*/
bool handlePageFlip();
/* ------------------------------------------------------------------------
* Transactions
*/
uint32_t getTransactionFlags(uint32_t flags);
uint32_t peekTransactionFlags();
uint32_t setTransactionFlags(uint32_t flags);
void commitTransaction();
uint32_t setClientStateLocked(const sp<Client>& client, const layer_state_t& s);
uint32_t setDisplayStateLocked(const DisplayState& s);
/* ------------------------------------------------------------------------
* Layer management
*/
status_t createLayer(const String8& name, const sp<Client>& client,
uint32_t w, uint32_t h, PixelFormat format, uint32_t flags,
uint32_t windowType, uint32_t ownerUid, sp<IBinder>* handle,
sp<IGraphicBufferProducer>* gbp, sp<Layer>* parent);
status_t createNormalLayer(const sp<Client>& client, const String8& name,
uint32_t w, uint32_t h, uint32_t flags, PixelFormat& format,
sp<IBinder>* outHandle, sp<IGraphicBufferProducer>* outGbp,
sp<Layer>* outLayer);
status_t createDimLayer(const sp<Client>& client, const String8& name,
uint32_t w, uint32_t h, uint32_t flags, sp<IBinder>* outHandle,
sp<IGraphicBufferProducer>* outGbp, sp<Layer>* outLayer);
String8 getUniqueLayerName(const String8& name);
// called in response to the window-manager calling
// ISurfaceComposerClient::destroySurface()
status_t onLayerRemoved(const sp<Client>& client, const sp<IBinder>& handle);
// called when all clients have released all their references to
// this layer meaning it is entirely safe to destroy all
// resources associated to this layer.
status_t onLayerDestroyed(const wp<Layer>& layer);
// remove a layer from SurfaceFlinger immediately
status_t removeLayer(const sp<Layer>& layer);
// add a layer to SurfaceFlinger
status_t addClientLayer(const sp<Client>& client,
const sp<IBinder>& handle,
const sp<IGraphicBufferProducer>& gbc,
const sp<Layer>& lbc,
const sp<Layer>& parent);
/* ------------------------------------------------------------------------
* Boot animation, on/off animations and screen capture
*/
void startBootAnim();
void renderScreenImplLocked(
const sp<const DisplayDevice>& hw,
Rect sourceCrop, uint32_t reqWidth, uint32_t reqHeight,
int32_t minLayerZ, int32_t maxLayerZ,
bool yswap, bool useIdentityTransform, Transform::orientation_flags rotation);
status_t captureScreenImplLocked(
const sp<const DisplayDevice>& hw,
const sp<IGraphicBufferProducer>& producer,
Rect sourceCrop, uint32_t reqWidth, uint32_t reqHeight,
int32_t minLayerZ, int32_t maxLayerZ,
bool useIdentityTransform, Transform::orientation_flags rotation,
bool isLocalScreenshot);
sp<StartBootAnimThread> mStartBootAnimThread = nullptr;
/* ------------------------------------------------------------------------
* EGL
*/
size_t getMaxTextureSize() const;
size_t getMaxViewportDims() const;
/* ------------------------------------------------------------------------
* Display and layer stack management
*/
// called when starting, or restarting after system_server death
void initializeDisplays();
// Create an IBinder for a builtin display and add it to current state
void createBuiltinDisplayLocked(DisplayDevice::DisplayType type);
sp<const DisplayDevice> getDisplayDevice(const wp<IBinder>& dpy) const {
Mutex::Autolock _l(mStateLock);
return getDisplayDeviceLocked(dpy);
}
sp<DisplayDevice> getDisplayDevice(const wp<IBinder>& dpy) {
Mutex::Autolock _l(mStateLock);
return getDisplayDeviceLocked(dpy);
}
// NOTE: can only be called from the main thread or with mStateLock held
sp<const DisplayDevice> getDisplayDeviceLocked(const wp<IBinder>& dpy) const {
return mDisplays.valueFor(dpy);
}
// NOTE: can only be called from the main thread or with mStateLock held
sp<DisplayDevice> getDisplayDeviceLocked(const wp<IBinder>& dpy) {
return mDisplays.valueFor(dpy);
}
sp<const DisplayDevice> getDefaultDisplayDeviceLocked() const {
return getDisplayDeviceLocked(mBuiltinDisplays[DisplayDevice::DISPLAY_PRIMARY]);
}
void createDefaultDisplayDevice();
int32_t getDisplayType(const sp<IBinder>& display) {
if (!display.get()) return NAME_NOT_FOUND;
for (int i = 0; i < DisplayDevice::NUM_BUILTIN_DISPLAY_TYPES; ++i) {
if (display == mBuiltinDisplays[i]) {
return i;
}
}
return NAME_NOT_FOUND;
}
// mark a region of a layer stack dirty. this updates the dirty
// region of all screens presenting this layer stack.
void invalidateLayerStack(uint32_t layerStack, const Region& dirty);
#ifndef USE_HWC2
int32_t allocateHwcDisplayId(DisplayDevice::DisplayType type);
#endif
/* ------------------------------------------------------------------------
* H/W composer
*/
HWComposer& getHwComposer() const { return *mHwc; }
/* ------------------------------------------------------------------------
* Compositing
*/
void invalidateHwcGeometry();
void computeVisibleRegions(uint32_t layerStack,
Region& dirtyRegion, Region& opaqueRegion);
void preComposition(nsecs_t refreshStartTime);
void postComposition(nsecs_t refreshStartTime);
void updateCompositorTiming(
nsecs_t vsyncPhase, nsecs_t vsyncInterval, nsecs_t compositeTime,
std::shared_ptr<FenceTime>& presentFenceTime);
void setCompositorTimingSnapped(
nsecs_t vsyncPhase, nsecs_t vsyncInterval,
nsecs_t compositeToPresentLatency);
void rebuildLayerStacks();
// Given a dataSpace, returns the appropriate color_mode to use
// to display that dataSpace.
android_color_mode pickColorMode(android_dataspace dataSpace);
android_dataspace bestTargetDataSpace(android_dataspace a, android_dataspace b);
void setUpHWComposer();
void doComposition();
void doDebugFlashRegions();
void doDisplayComposition(const sp<const DisplayDevice>& displayDevice, const Region& dirtyRegion);
// compose surfaces for display hw. this fails if using GL and the surface
// has been destroyed and is no longer valid.
bool doComposeSurfaces(const sp<const DisplayDevice>& displayDevice, const Region& dirty);
void postFramebuffer();
void drawWormhole(const sp<const DisplayDevice>& displayDevice, const Region& region) const;
/* ------------------------------------------------------------------------
* Display management
*/
/* ------------------------------------------------------------------------
* VSync
*/
void enableHardwareVsync();
void resyncToHardwareVsync(bool makeAvailable);
void disableHardwareVsync(bool makeUnavailable);
public:
void resyncWithRateLimit();
void getCompositorTiming(CompositorTiming* compositorTiming);
private:
/* ------------------------------------------------------------------------
* Debugging & dumpsys
*/
void listLayersLocked(const Vector<String16>& args, size_t& index, String8& result) const;
void dumpStatsLocked(const Vector<String16>& args, size_t& index, String8& result) const;
void clearStatsLocked(const Vector<String16>& args, size_t& index, String8& result);
void dumpAllLocked(const Vector<String16>& args, size_t& index, String8& result) const;
bool startDdmConnection();
void appendSfConfigString(String8& result) const;
void checkScreenshot(size_t w, size_t s, size_t h, void const* vaddr,
const sp<const DisplayDevice>& hw,
int32_t minLayerZ, int32_t maxLayerZ);
void logFrameStats();
void dumpStaticScreenStats(String8& result) const;
// Not const because each Layer needs to query Fences and cache timestamps.
void dumpFrameEventsLocked(String8& result);
void recordBufferingStats(const char* layerName,
std::vector<OccupancyTracker::Segment>&& history);
void dumpBufferingStats(String8& result) const;
void dumpWideColorInfo(String8& result) const;
bool isLayerTripleBufferingDisabled() const {
return this->mLayerTripleBufferingDisabled;
}
#ifdef USE_HWC2
/* ------------------------------------------------------------------------
* VrFlinger
*/
void clearHwcLayers(const LayerVector& layers);
void resetHwcLocked();
// Check to see if we should handoff to vr flinger.
void updateVrFlinger();
#endif
/* ------------------------------------------------------------------------
* Attributes
*/
// access must be protected by mStateLock
mutable Mutex mStateLock;
State mCurrentState{LayerVector::StateSet::Current};
volatile int32_t mTransactionFlags;
Condition mTransactionCV;
bool mTransactionPending;
bool mAnimTransactionPending;
SortedVector< sp<Layer> > mLayersPendingRemoval;
SortedVector< wp<IBinder> > mGraphicBufferProducerList;
// protected by mStateLock (but we could use another lock)
bool mLayersRemoved;
bool mLayersAdded;
// access must be protected by mInvalidateLock
volatile int32_t mRepaintEverything;
// current, real and vr hardware composers.
HWComposer* mHwc;
#ifdef USE_HWC2
HWComposer* mRealHwc;
HWComposer* mVrHwc;
#endif
// constant members (no synchronization needed for access)
RenderEngine* mRenderEngine;
nsecs_t mBootTime;
bool mGpuToCpuSupported;
sp<EventThread> mEventThread;
sp<EventThread> mSFEventThread;
sp<EventThread> mInjectorEventThread;
sp<InjectVSyncSource> mVSyncInjector;
sp<EventControlThread> mEventControlThread;
EGLContext mEGLContext;
EGLDisplay mEGLDisplay;
sp<IBinder> mBuiltinDisplays[DisplayDevice::NUM_BUILTIN_DISPLAY_TYPES];
#ifdef USE_HWC2
std::unique_ptr<dvr::VrFlinger> mVrFlinger;
#endif
// Can only accessed from the main thread, these members
// don't need synchronization
State mDrawingState{LayerVector::StateSet::Drawing};
bool mVisibleRegionsDirty;
#ifndef USE_HWC2
bool mHwWorkListDirty;
#else
bool mGeometryInvalid;
#endif
bool mAnimCompositionPending;
#ifdef USE_HWC2
std::vector<sp<Layer>> mLayersWithQueuedFrames;
sp<Fence> mPreviousPresentFence = Fence::NO_FENCE;
bool mHadClientComposition = false;
#endif
FenceTimeline mGlCompositionDoneTimeline;
FenceTimeline mDisplayTimeline;
// this may only be written from the main thread with mStateLock held
// it may be read from other threads with mStateLock held
DefaultKeyedVector< wp<IBinder>, sp<DisplayDevice> > mDisplays;
// don't use a lock for these, we don't care
int mDebugRegion;
int mDebugDDMS;
int mDebugDisableHWC;
int mDebugDisableTransformHint;
volatile nsecs_t mDebugInSwapBuffers;
nsecs_t mLastSwapBufferTime;
volatile nsecs_t mDebugInTransaction;
nsecs_t mLastTransactionTime;
bool mBootFinished;
bool mForceFullDamage;
#ifdef USE_HWC2
bool mPropagateBackpressure = true;
#endif
SurfaceInterceptor mInterceptor;
bool mUseHwcVirtualDisplays = false;
// Restrict layers to use two buffers in their bufferqueues.
bool mLayerTripleBufferingDisabled = false;
// these are thread safe
mutable MessageQueue mEventQueue;
FrameTracker mAnimFrameTracker;
DispSync mPrimaryDispSync;
// protected by mDestroyedLayerLock;
mutable Mutex mDestroyedLayerLock;
Vector<Layer const *> mDestroyedLayers;
// protected by mHWVsyncLock
Mutex mHWVsyncLock;
bool mPrimaryHWVsyncEnabled;
bool mHWVsyncAvailable;
// protected by mCompositorTimingLock;
mutable std::mutex mCompositorTimingLock;
CompositorTiming mCompositorTiming;
// Only accessed from the main thread.
struct CompositePresentTime {
nsecs_t composite { -1 };
std::shared_ptr<FenceTime> display { FenceTime::NO_FENCE };
};
std::queue<CompositePresentTime> mCompositePresentTimes;
/* ------------------------------------------------------------------------
* Feature prototyping
*/
bool mInjectVSyncs;
Daltonizer mDaltonizer;
#ifndef USE_HWC2
bool mDaltonize;
#endif
mat4 mPreviousColorMatrix;
mat4 mColorMatrix;
bool mHasColorMatrix;
// Static screen stats
bool mHasPoweredOff;
static const size_t NUM_BUCKETS = 8; // < 1-7, 7+
nsecs_t mFrameBuckets[NUM_BUCKETS];
nsecs_t mTotalTime;
std::atomic<nsecs_t> mLastSwapTime;
size_t mNumLayers;
// Double- vs. triple-buffering stats
struct BufferingStats {
BufferingStats()
: numSegments(0),
totalTime(0),
twoBufferTime(0),
doubleBufferedTime(0),
tripleBufferedTime(0) {}
size_t numSegments;
nsecs_t totalTime;
// "Two buffer" means that a third buffer was never used, whereas
// "double-buffered" means that on average the segment only used two
// buffers (though it may have used a third for some part of the
// segment)
nsecs_t twoBufferTime;
nsecs_t doubleBufferedTime;
nsecs_t tripleBufferedTime;
};
mutable Mutex mBufferingStatsMutex;
std::unordered_map<std::string, BufferingStats> mBufferingStats;
// Verify that transaction is being called by an approved process:
// either AID_GRAPHICS or AID_SYSTEM.
status_t CheckTransactCodeCredentials(uint32_t code);
#ifdef USE_HWC2
std::atomic<bool> mVrFlingerRequestsDisplay;
static bool useVrFlinger;
#endif
};
}; // namespace android
#endif // ANDROID_SURFACE_FLINGER_H
