127|console:/ #
127|console:/ # dumpsys display
DISPLAY MANAGER (dumpsys display)
mOnlyCode=false
mSafeMode=false
mPendingTraversal=false
mGlobalDisplayState=ON
mNextNonDefaultDisplayId=2
mViewports=[DisplayViewport{type=INTERNAL, valid=true, isActive=true, displayId=0, uniqueId='local:129', physicalPort=129, orientation=0, logicalFrame=Rect(0, 0 - 4032, 756), physicalFrame=Rect(0, 0 - 4032, 756), deviceWidth=4032, deviceHeight=756}]
mDefaultDisplayDefaultColorMode=0
mSingleDisplayDemoMode=false
mWifiDisplayScanRequestCount=0
mStableDisplaySize=Point(4032, 756)
mMinimumBrightnessCurve=[(0.0, 0.0), (2000.0, 50.0), (4000.0, 90.0)]
Display Adapters: size=4
LocalDisplayAdapter
VirtualDisplayAdapter
OverlayDisplayAdapter
mCurrentOverlaySetting=
mOverlays: size=0
WifiDisplayAdapter
mCurrentStatus=WifiDisplayStatus{featureState=1, scanState=0, activeDisplayState=0, activeDisplay=null, displays=[], sessionInfo=WifiDisplaySessionInfo:
Client/Owner: Client
GroupId:
Passphrase:
SessionId: 0
IP Address: }
mFeatureState=1
mScanState=0
mActiveDisplayState=0
mActiveDisplay=null
mDisplays=[]
mAvailableDisplays=[]
mRememberedDisplays=[]
mPendingStatusChangeBroadcast=false
mSupportsProtectedBuffers=true
mDisplayController:
mWifiDisplayOnSetting=false
mWifiP2pEnabled=false
mWfdEnabled=false
mWfdEnabling=false
mNetworkInfo=null
mScanRequested=false
mDiscoverPeersInProgress=false
mDesiredDevice=null
mConnectingDisplay=null
mDisconnectingDisplay=null
mCancelingDisplay=null
mConnectedDevice=null
mConnectionRetriesLeft=0
mRemoteDisplay=null
mRemoteDisplayInterface=null
mRemoteDisplayConnected=false
mAdvertisedDisplay=null
mAdvertisedDisplaySurface=null
mAdvertisedDisplayWidth=0
mAdvertisedDisplayHeight=0
mAdvertisedDisplayFlags=0
mAvailableWifiDisplayPeers: size=0
Display Devices: size=2
DisplayDeviceInfo{"内置屏幕": uniqueId="local:129", 4032 x 756, modeId 1, defaultModeId 1, supportedModes [{id=1, width=4032, height=756, fps=60.000004}], colorMode 0, supportedColorModes [0], HdrCapabilities HdrCapabilities{mSupportedHdrTypes=[], mMaxLuminance=500.0, mMaxAverageLuminance=500.0, mMinLuminance=0.0}, allmSupported false, gameContentTypeSupported false, density 160, 152.173 x 152.4 dpi, appVsyncOff 1000000, presDeadline 16666666, touch INTERNAL, rotation 0, type INTERNAL, address {port=129}, deviceProductInfo null, state ON, FLAG_DEFAULT_DISPLAY, FLAG_ROTATES_WITH_CONTENT, FLAG_SECURE, FLAG_SUPPORTS_PROTECTED_BUFFERS}
mAdapter=LocalDisplayAdapter
mUniqueId=local:129
mDisplayToken=android.os.BinderProxy@88032be
mCurrentLayerStack=0
mCurrentOrientation=0
mCurrentLayerStackRect=Rect(0, 0 - 4032, 756)
mCurrentDisplayRect=Rect(0, 0 - 4032, 756)
mCurrentSurface=null
mPhysicalDisplayId=129
mDisplayModeSpecs={baseModeId=1 primaryRefreshRateRange=[0 60] appRequestRefreshRateRange=[0 Infinity]}
mDisplayModeSpecsInvalid=false
mActiveConfigId=0
mActiveModeId=1
mActiveColorMode=0
mDefaultModeId=1
mState=ON
mBrightnessState=0.05
mBacklight=com.android.server.lights.LightsService$LightImpl@affaf1f
mAllmSupported=false
mAllmRequested=false
mGameContentTypeSupported=false
mGameContentTypeRequested=false
mDisplayInfo=DisplayInfo{isInternal=true, density=1.0, secure=true, deviceProductInfo=null}
mDisplayConfigs=
DisplayConfig{width=4032, height=756, xDpi=152.173, yDpi=152.4, refreshRate=60.000004, appVsyncOffsetNanos=1000000, presentationDeadlineNanos=16666666, configGroup=0}
mSupportedModes=
DisplayModeRecord{mMode={id=1, width=4032, height=756, fps=60.000004}}
mSupportedColorModes=[0] DisplayDeviceInfo{"内置屏幕": uniqueId="local:130", 1920 x 720, modeId 2, defaultModeId 2, supportedModes [{id=2, width=1920, height=720, fps=60.000004}], colorMode 0, supportedColorModes [0], HdrCapabilities HdrCapabilities{mSupportedHdrTypes=[], mMaxLuminance=500.0, mMaxAverageLuminance=500.0, mMinLuminance=0.0}, allmSupported false, gameContentTypeSupported false, density 160, 167.013 x 167.779 dpi, appVsyncOff 1000000, presDeadline 16666666, touch INTERNAL, rotation 0, type INTERNAL, address {port=130}, deviceProductInfo null, state ON, FLAG_ROTATES_WITH_CONTENT, FLAG_SECURE, FLAG_SUPPORTS_PROTECTED_BUFFERS}
mAdapter=LocalDisplayAdapter
mUniqueId=local:130
mDisplayToken=android.os.BinderProxy@733326c
mCurrentLayerStack=0
mCurrentOrientation=0
mCurrentLayerStackRect=Rect(0, 0 - 4032, 756)
mCurrentDisplayRect=Rect(0, 180 - 1920, 540)
mCurrentSurface=null
mPhysicalDisplayId=130
mDisplayModeSpecs={baseModeId=2 primaryRefreshRateRange=[0 0] appRequestRefreshRateRange=[0 0]}
mDisplayModeSpecsInvalid=true
mActiveConfigId=0
mActiveModeId=2
mActiveColorMode=0
mDefaultModeId=2
mState=ON
mBrightnessState=NaN
mBacklight=null
mAllmSupported=false
mAllmRequested=false
mGameContentTypeSupported=false
mGameContentTypeRequested=false
mDisplayInfo=DisplayInfo{isInternal=true, density=1.0, secure=true, deviceProductInfo=null}
mDisplayConfigs=
DisplayConfig{width=1920, height=720, xDpi=167.013, yDpi=167.779, refreshRate=60.000004, appVsyncOffsetNanos=1000000, presentationDeadlineNanos=16666666, configGroup=0}
mSupportedModes=
DisplayModeRecord{mMode={id=2, width=1920, height=720, fps=60.000004}}
mSupportedColorModes=[0]
Logical Displays: size=2
Display 0:
mDisplayId=0
mLayerStack=0
mHasContent=true
mDesiredDisplayModeSpecs={baseModeId=1 primaryRefreshRateRange=[0 60] appRequestRefreshRateRange=[0 Infinity]}
mRequestedColorMode=0
mDisplayOffset=(0, 0)
mDisplayScalingDisabled=false
mPrimaryDisplayDevice=内置屏幕
mBaseDisplayInfo=DisplayInfo{" 置屏幕", displayId 0, FLAG_SECURE, FLAG_SUPPORTS_PROTECTED_BUFFERS, FLAG_TRUSTED, real 4032 x 756, largest app 4032 x 756, smallest app 4032 x 756, appVsyncOff 1000000, presDeadline 16666666, mode 1, defaultMode 1, modes [{id=1, width=4032, height=756, fps=60.000004}], hdrCapabilities HdrCapabilities{mSupportedHdrTypes=[], mMaxLuminance=500.0, mMaxAverageLuminance=500.0, mMinLuminance=0.0}, minimalPostProcessingSupported false, rotation 0, state ON, type INTERNAL, uniqueId "local:129", app 4032 x 756, density 160 (152.173 x 152.4) dpi, layerStack 0, colorMode 0, supportedColorModes [0], address {port=129}, deviceProductInfo null, removeMode 0}
mOverrideDisplayInfo=DisplayInfo{"内置屏幕", displayId 0, FLAG_SECURE, FLAG_SUPPORTS_PROTECTED_BUFFERS, FLAG_TRUSTED, real 4032 x 756, largest app 4032 x 3828, smallest app 756 x 552, appVsyncOff 1000000, presDeadline 16666666, mode 1, defaultMode 1, modes [{id=1, width=4032, height=756, fps=60.000004}], hdrCapabilities HdrCapabilities{mSupportedHdrTypes=[], mMaxLuminance=500.0, mMaxAverageLuminance=500.0, mMinLuminance=0.0}, minimalPostProcessingSupported false, rotation 0, state ON, type INTERNAL, uniqueId "local:129", app 4032 x 648, density 160 (152.173 x 152.4) dpi, layerStack 0, colorMode 0, supportedColorModes [0], address {port=129}, deviceProductInfo null, removeMode 0}
mRequestedMinimalPostProcessing=false
Display 1:
mDisplayId=1
mLayerStack=1
mHasContent=false
mDesiredDisplayModeSpecs={baseModeId=2 primaryRefreshRateRange=[0 60] appRequestRefreshRateRange=[0 Infinity]}
mRequestedColorMode=0
mDisplayOffset=(0, 0)
mDisplayScalingDisabled=false
mPrimaryDisplayDevice=内置屏幕
mBaseDisplayInfo=DisplayInfo{"内置屏幕", displayId 1, FLAG_SECURE, FLAG_SUPPORTS_PROTECTED_BUFFERS, FLAG_TRUSTED, real 1920 x 720, largest app 1920 x 720, smallest app 1920 x 720, appVsyncOff 1000000, presDeadline 16666666, mode 2, defaultMode 2, modes [{id=2, width=1920, height=720, fps=60.000004}], hdrCapabilities HdrCapabilities{mSupportedHdrTypes=[], mMaxLuminance=500.0, mMaxAverageLuminance=500.0, mMinLuminance=0.0}, minimalPostProcessingSupported false, rotation 0, state ON, type INTERNAL, uniqueId "local:130", app 1920 x 720, density 160 (167.013 x 167.779) dpi, layerStack 1, colorMode 0, supportedColorModes [0], address {port=130}, deviceProductInfo null, removeMode 0}
mOverrideDisplayInfo=DisplayInfo{"内置屏幕", displayId 1, FLAG_SECURE, FLAG_SUPPORTS_PROTECTED_BUFFERS, FLAG_TRUSTED, real 1920 x 720, largest app 1920 x 1920, smallest app 720 x 720, appVsyncOff 1000000, presDeadline 16666666, mode 2, defaultMode 2, modes [{id=2, width=1920, height=720, fps=60.000004}], hdrCapabilities HdrCapabilities{mSupportedHdrTypes=[], mMaxLuminance=500.0, mMaxAverageLuminance=500.0, mMinLuminance=0.0}, minimalPostProcessingSupported false, rotation 0, state ON, type INTERNAL, uniqueId "local:130", app 1920 x 720, density 160 (167.013 x 167.779) dpi, layerStack 1, colorMode 0, supportedColorModes [0], address {port=130}, deviceProductInfo null, removeMode 0}
mRequestedMinimalPostProcessing=false
DisplayModeDirector
mSupportedModesByDisplay:
0 -> [{id=1, width=4032, height=756, fps=60.000004}]
1 -> [{id=2, width=1920, height=720, fps=60.000004}]
mDefaultModeByDisplay:
0 -> {id=1, width=4032, height=756, fps=60.000004}
1 -> {id=2, width=1920, height=720, fps=60.000004}
mVotesByDisplay:
-1:
PRIORITY_USER_SETTING_MIN_REFRESH_RATE -> Vote{width=-1, height=-1, minRefreshRate=0.0, maxRefreshRate=Infinity}
PRIORITY_DEFAULT_REFRESH_RATE -> Vote{width=-1, height=-1, minRefreshRate=0.0, maxRefreshRate=60.0}
SettingsObserver
mDefaultRefreshRate: 60.0
mDefaultPeakRefreshRate: 0.0
AppRequestObserver
mAppRequestedModeByDisplay:
BrightnessObserver
mAmbientLux: -1.0
mBrightness: 59
mDefaultDisplayState: 2
mLowPowerModeEnabled: false
mRefreshRateChangeable: false
mShouldObserveDisplayLowChange: false
mShouldObserveAmbientLowChange: false
mRefreshRateInLowZone: 0
mShouldObserveDisplayHighChange: false
mShouldObserveAmbientHighChange: false
mRefreshRateInHighZone: 0
mLastSensorData: 0.0
mTimestamp: 1970-01-01 08:00:00.000
Callbacks: size=65
0: mPid=1432, mWifiDisplayScanRequested=false
1: mPid=1797, mWifiDisplayScanRequested=false
2: mPid=1904, mWifiDisplayScanRequested=false
3: mPid=1935, mWifiDisplayScanRequested=false
4: mPid=2008, mWifiDisplayScanRequested=false
5: mPid=2058, mWifiDisplayScanRequested=false
6: mPid=2068, mWifiDisplayScanRequested=false
7: mPid=2107, mWifiDisplayScanRequested=false
8: mPid=2135, mWifiDisplayScanRequested=false
9: mPid=2153, mWifiDisplayScanRequested=false
10: mPid=2197, mWifiDisplayScanRequested=false
11: mPid=2224, mWifiDisplayScanRequested=false
12: mPid=2251, mWifiDisplayScanRequested=false
13: mPid=2310, mWifiDisplayScanRequested=false
14: mPid=2366, mWifiDisplayScanRequested=false
15: mPid=2415, mWifiDisplayScanRequested=false
16: mPid=2456, mWifiDisplayScanRequested=false
17: mPid=2476, mWifiDisplayScanRequested=false
18: mPid=2522, mWifiDisplayScanRequested=false
19: mPid=2562, mWifiDisplayScanRequested=false
20: mPid=2604, mWifiDisplayScanRequested=false
21: mPid=2662, mWifiDisplayScanRequested=false
22: mPid=2701, mWifiDisplayScanRequested=false
23: mPid=2750, mWifiDisplayScanRequested=false
24: mPid=2800, mWifiDisplayScanRequested=false
25: mPid=2837, mWifiDisplayScanRequested=false
26: mPid=2958, mWifiDisplayScanRequested=false
27: mPid=3287, mWifiDisplayScanRequested=false
28: mPid=3326, mWifiDisplayScanRequested=false
29: mPid=3365, mWifiDisplayScanRequested=false
30: mPid=3399, mWifiDisplayScanRequested=false
31: mPid=3428, mWifiDisplayScanRequested=false
32: mPid=3451, mWifiDisplayScanRequested=false
33: mPid=3486, mWifiDisplayScanRequested=false
34: mPid=3517, mWifiDisplayScanRequested=false
35: mPid=3566, mWifiDisplayScanRequested=false
36: mPid=3651, mWifiDisplayScanRequested=false
37: mPid=3683, mWifiDisplayScanRequested=false
38: mPid=3726, mWifiDisplayScanRequested=false
39: mPid=3749, mWifiDisplayScanRequested=false
40: mPid=3782, mWifiDisplayScanRequested=false
41: mPid=3822, mWifiDisplayScanRequested=false
42: mPid=3891, mWifiDisplayScanRequested=false
43: mPid=3920, mWifiDisplayScanRequested=false
44: mPid=3973, mWifiDisplayScanRequested=false
45: mPid=4006, mWifiDisplayScanRequested=false
46: mPid=4095, mWifiDisplayScanRequested=false
47: mPid=4153, mWifiDisplayScanRequested=false
48: mPid=4239, mWifiDisplayScanRequested=false
49: mPid=4326, mWifiDisplayScanRequested=false
50: mPid=4640, mWifiDisplayScanRequested=false
51: mPid=4695, mWifiDisplayScanRequested=false
52: mPid=4799, mWifiDisplayScanRequested=false
53: mPid=4945, mWifiDisplayScanRequested=false
54: mPid=6161, mWifiDisplayScanRequested=false
55: mPid=7091, mWifiDisplayScanRequested=false
56: mPid=7185, mWifiDisplayScanRequested=false
57: mPid=7532, mWifiDisplayScanRequested=false
58: mPid=7545, mWifiDisplayScanRequested=false
59: mPid=7560, mWifiDisplayScanRequested=false
60: mPid=7594, mWifiDisplayScanRequested=false
61: mPid=8049, mWifiDisplayScanRequested=false
62: mPid=11273, mWifiDisplayScanRequested=false
63: mPid=11644, mWifiDisplayScanRequested=false
64: mPid=26320, mWifiDisplayScanRequested=false
Display Power Controller Locked State:
mDisplayReadyLocked=true
mPendingRequestLocked=policy=DIM, useProximitySensor=false, screenBrightnessOverride=NaN, useAutoBrightness=false, screenAutoBrightnessAdjustmentOverride=NaN, screenLowPowerBrightnessFactor=1.0, blockScreenOn=false, lowPowerMode=false, boostScreenBrightness=false, dozeScreenBrightness=NaN, dozeScreenState=UNKNOWN
mPendingRequestChangedLocked=false
mPendingWaitForNegativeProximityLocked=false
mPendingUpdatePowerStateLocked=false
Display Power Controller Configuration:
mScreenBrightnessDozeConfig=0.0
mScreenBrightnessDimConfig=0.05
mScreenBrightnessDefault=0.39763778
mScreenBrightnessForVrRangeMinimum=0.307087
mScreenBrightnessForVrRangeMaximum=1.0
mScreenBrightnessForVrDefault=0.33464
mUseSoftwareAutoBrightnessConfig=true
mAllowAutoBrightnessWhileDozingConfig=false
mSkipScreenOnBrightnessRamp=false
mColorFadeFadesConfig=false
mColorFadeEnabled=true
mDisplayBlanksAfterDozeConfig=false
mBrightnessBucketsInDozeConfig=false
Display Power Controller Thread State:
mPowerRequest=policy=DIM, useProximitySensor=false, screenBrightnessOverride=NaN, useAutoBrightness=false, screenAutoBrightnessAdjustmentOverride=NaN, screenLowPowerBrightnessFactor=1.0, blockScreenOn=false, lowPowerMode=false, boostScreenBrightness=false, dozeScreenBrightness=NaN, dozeScreenState=UNKNOWN
mUnfinishedBusiness=false
mWaitingForNegativeProximity=false
mProximitySensor=null
mProximitySensorEnabled=false
mProximityThreshold=0.0
mProximity=Unknown
mPendingProximity=Unknown
mPendingProximityDebounceTime=-1 (3486036 ms ago)
mScreenOffBecauseOfProximity=false
mLastUserSetScreenBrightnessFloat=0.0
mPendingScreenBrightnessSettingFloat=NaN
mTemporaryScreenBrightnessFloat=NaN
mAutoBrightnessAdjustment=0.0
mBrightnessReason=manual [ dim ]
mTemporaryAutoBrightnessAdjustment=NaN
mPendingAutoBrightnessAdjustment=NaN
mScreenBrightnessForVrFloat=0.33464
mAppliedAutoBrightness=false
mAppliedDimming=true
mAppliedLowPower=false
mAppliedScreenBrightnessOverride=false
mAppliedTemporaryBrightness=false
mDozing=false
mSkipRampState=RAMP_STATE_SKIP_NONE
mScreenOnBlockStartRealTime=1221052
mScreenOffBlockStartRealTime=1188731
mPendingScreenOnUnblocker=null
mPendingScreenOffUnblocker=null
mPendingScreenOff=false
mReportedToPolicy=REPORTED_TO_POLICY_SCREEN_ON
mScreenBrightnessRampAnimator.isAnimating()=false
mColorFadeOnAnimator.isStarted()=false
mColorFadeOffAnimator.isStarted()=false
Display Power State:
mScreenState=ON
mScreenBrightness=0.05
mScreenReady=true
mScreenUpdatePending=false
mColorFadePrepared=false
mColorFadeLevel=1.0
mColorFadeReady=true
mColorFadeDrawPending=false
Photonic Modulator State:
mPendingState=ON
mPendingBacklight=0.05
mActualState=ON
mActualBacklight=0.05
mStateChangeInProgress=false
mBacklightChangeInProgress=false
Color Fade State:
mPrepared=false
mMode=1
mDisplayLayerStack=0
mDisplayWidth=4032
mDisplayHeight=756
mSurfaceVisible=false
mSurfaceAlpha=0.0
Automatic Brightness Controller Configuration:
mScreenBrightnessRangeMinimum=0.035433073
mScreenBrightnessRangeMaximum=1.0
mDozeScaleFactor=1.0
mInitialLightSensorRate=250
mNormalLightSensorRate=250
mLightSensorWarmUpTimeConfig=0
mBrighteningLightDebounceConfig=4000
mDarkeningLightDebounceConfig=8000
mResetAmbientLuxAfterWarmUpConfig=true
mAmbientLightHorizon=10000
mWeightingIntercept=10000
Automatic Brightness Controller State:
mLightSensor=null
mLightSensorEnabled=false
mLightSensorEnableTime=0 (3486035 ms ago)
mCurrentLightSensorRate=-1
mAmbientLux=0.0
mAmbientLuxValid=false
mAmbientBrighteningThreshold=0.0
mAmbientDarkeningThreshold=0.0
mScreenBrighteningThreshold=0.0
mScreenDarkeningThreshold=0.0
mLastObservedLux=0.0
mLastObservedLuxTime=0 (3486035 ms ago)
mRecentLightSamples=0
mAmbientLightRingBuffer=[]
mScreenAutoBrightness=NaN
mDisplayPolicy=DIM
mShortTermModelTimeout=300000
mShortTermModelAnchor=-1.0
mShortTermModelValid=true
mBrightnessAdjustmentSamplePending=false
mBrightnessAdjustmentSampleOldLux=0.0
mBrightnessAdjustmentSampleOldBrightness=0.0
mForegroundAppPackageName=null
mPendingForegroundAppPackageName=null
mForegroundAppCategory=-1
mPendingForegroundAppCategory=-1
SimpleMappingStrategy
mSpline=MonotoneCubicSpline{[(0.0, 0.035433073: 0.003937008), (10.0, 0.07480315: 0.003937008), (30.0, 0.15354331: 0.003937008), (60.0, 0.27165353: 0.003937008), (100.0, 0.42913386: 0.003937008), (150.0, 0.62598425: 0.0032808399), (210.0, 0.78346455: 0.0037182854), (255.0, 1.0: 0.004811899)]}
mMaxGamma=3.0
mAutoBrightnessAdjustment=0.0
mUserLux=-1.0
mUserBrightness=-1.0
HysteresisLevels
mBrighteningThresholds=[0.1]
mDarkeningThresholds=[0.2]
mThresholdLevels=[]
HysteresisLevels
mBrighteningThresholds=[0.1]
mDarkeningThresholds=[0.2]
mThresholdLevels=[]
BrightnessTracker state:
mStarted=false
mLastBatteryLevel=NaN
mLastBrightness=-1.0
mLastSensorReadings.size=0
mEventsDirty=false
mEvents.size=0
mWriteBrightnessTrackerStateScheduled=false
mSensorRegistered=false
mColorSamplingEnabled=false
mNoFramesToSample=0
mFrameRate=0.0
PersistentDataStore
mLoaded=true
mDirty=false
RememberedWifiDisplays:
DisplayStates:
StableDeviceValues:
StableDisplayWidth=4032
StableDisplayHeight=756
BrightnessConfigurations:
console:/ #
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本文深入解析了Android系统中灯光服务(LightsService)的工作原理及其实现细节，包括各种灯光类型的定义，如背光、键盘灯等，以及底层硬件驱动(button light driver)的介绍。文章覆盖了从Java层到C/C++层的实现，提供了源代码位置和相关链接。
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