| /* |
| * Copyright (C) 2014 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. |
| */ |
| |
| package android.hardware.display; |
| |
| import android.annotation.Nullable; |
| import android.hardware.SensorManager; |
| import android.os.Handler; |
| import android.os.PowerManager; |
| import android.util.IntArray; |
| import android.util.SparseArray; |
| import android.view.Display; |
| import android.view.DisplayInfo; |
| import android.view.SurfaceControl; |
| import android.view.SurfaceControl.Transaction; |
| |
| /** |
| * Display manager local system service interface. |
| * |
| * @hide Only for use within the system server. |
| */ |
| public abstract class DisplayManagerInternal { |
| /** |
| * Called by the power manager to initialize power management facilities. |
| */ |
| public abstract void initPowerManagement(DisplayPowerCallbacks callbacks, |
| Handler handler, SensorManager sensorManager); |
| |
| /** |
| * Called by the power manager to request a new power state. |
| * <p> |
| * The display power controller makes a copy of the provided object and then |
| * begins adjusting the power state to match what was requested. |
| * </p> |
| * |
| * @param request The requested power state. |
| * @param waitForNegativeProximity If true, issues a request to wait for |
| * negative proximity before turning the screen back on, assuming the screen |
| * was turned off by the proximity sensor. |
| * @return True if display is ready, false if there are important changes that must |
| * be made asynchronously (such as turning the screen on), in which case the caller |
| * should grab a wake lock, watch for {@link DisplayPowerCallbacks#onStateChanged()} |
| * then try the request again later until the state converges. |
| */ |
| public abstract boolean requestPowerState(DisplayPowerRequest request, |
| boolean waitForNegativeProximity); |
| |
| /** |
| * Returns true if the proximity sensor screen-off function is available. |
| */ |
| public abstract boolean isProximitySensorAvailable(); |
| |
| /** |
| * Take a screenshot of the specified display and return a buffer. |
| * |
| * @param displayId The display id to take the screenshot of. |
| * @return The buffer or null if we have failed. |
| */ |
| public abstract SurfaceControl.ScreenshotGraphicBuffer screenshot(int displayId); |
| |
| /** |
| * Returns information about the specified logical display. |
| * |
| * @param displayId The logical display id. |
| * @return The logical display info, or null if the display does not exist. The |
| * returned object must be treated as immutable. |
| */ |
| public abstract DisplayInfo getDisplayInfo(int displayId); |
| |
| /** |
| * Registers a display transaction listener to provide the client a chance to |
| * update its surfaces within the same transaction as any display layout updates. |
| * |
| * @param listener The listener to register. |
| */ |
| public abstract void registerDisplayTransactionListener(DisplayTransactionListener listener); |
| |
| /** |
| * Unregisters a display transaction listener to provide the client a chance to |
| * update its surfaces within the same transaction as any display layout updates. |
| * |
| * @param listener The listener to unregister. |
| */ |
| public abstract void unregisterDisplayTransactionListener(DisplayTransactionListener listener); |
| |
| /** |
| * Overrides the display information of a particular logical display. |
| * This is used by the window manager to control the size and characteristics |
| * of the default display. It is expected to apply the requested change |
| * to the display information synchronously so that applications will immediately |
| * observe the new state. |
| * |
| * NOTE: This method must be the only entry point by which the window manager |
| * influences the logical configuration of displays. |
| * |
| * @param displayId The logical display id. |
| * @param info The new data to be stored. |
| */ |
| public abstract void setDisplayInfoOverrideFromWindowManager( |
| int displayId, DisplayInfo info); |
| |
| /** |
| * Get current display info without override from WindowManager. |
| * Current implementation of LogicalDisplay#getDisplayInfoLocked() always returns display info |
| * with overrides from WM if set. This method can be used for getting real display size without |
| * overrides to determine if real changes to display metrics happened. |
| * @param displayId Id of the target display. |
| * @param outInfo {@link DisplayInfo} to fill. |
| */ |
| public abstract void getNonOverrideDisplayInfo(int displayId, DisplayInfo outInfo); |
| |
| /** |
| * Called by the window manager to perform traversals while holding a |
| * surface flinger transaction. |
| */ |
| public abstract void performTraversal(Transaction t); |
| |
| /** |
| * Tells the display manager about properties of the display that depend on the windows on it. |
| * This includes whether there is interesting unique content on the specified logical display, |
| * and whether the one of the windows has a preferred refresh rate. |
| * <p> |
| * If the display has unique content, then the display manager arranges for it |
| * to be presented on a physical display if appropriate. Otherwise, the display manager |
| * may choose to make the physical display mirror some other logical display. |
| * </p> |
| * |
| * <p> |
| * If one of the windows on the display has a preferred refresh rate that's supported by the |
| * display, then the display manager will request its use. |
| * </p> |
| * |
| * @param displayId The logical display id to update. |
| * @param hasContent True if the logical display has content. This is used to control automatic |
| * mirroring. |
| * @param requestedRefreshRate The preferred refresh rate for the top-most visible window that |
| * has a preference. |
| * @param requestedModeId The preferred mode id for the top-most visible window that has a |
| * preference. |
| * @param requestedMinimalPostProcessing The preferred minimal post processing setting for the |
| * display. This is true when there is at least one visible window that wants minimal post |
| * processng on. |
| * @param inTraversal True if called from WindowManagerService during a window traversal |
| * prior to call to performTraversalInTransactionFromWindowManager. |
| */ |
| public abstract void setDisplayProperties(int displayId, boolean hasContent, |
| float requestedRefreshRate, int requestedModeId, boolean requestedMinimalPostProcessing, |
| boolean inTraversal); |
| |
| /** |
| * Applies an offset to the contents of a display, for example to avoid burn-in. |
| * <p> |
| * TODO: Technically this should be associated with a physical rather than logical |
| * display but this is good enough for now. |
| * </p> |
| * |
| * @param displayId The logical display id to update. |
| * @param x The X offset by which to shift the contents of the display. |
| * @param y The Y offset by which to shift the contents of the display. |
| */ |
| public abstract void setDisplayOffsets(int displayId, int x, int y); |
| |
| /** |
| * Disables scaling for a display. |
| * |
| * @param displayId The logical display id to disable scaling for. |
| * @param disableScaling {@code true} to disable scaling, |
| * {@code false} to use the default scaling behavior of the logical display. |
| */ |
| public abstract void setDisplayScalingDisabled(int displayId, boolean disableScaling); |
| |
| /** |
| * Provide a list of UIDs that are present on the display and are allowed to access it. |
| * |
| * @param displayAccessUIDs Mapping displayId -> int array of UIDs. |
| */ |
| public abstract void setDisplayAccessUIDs(SparseArray<IntArray> displayAccessUIDs); |
| |
| /** |
| * Persist brightness slider events and ambient brightness stats. |
| */ |
| public abstract void persistBrightnessTrackerState(); |
| |
| /** |
| * Notifies the display manager that resource overlays have changed. |
| */ |
| public abstract void onOverlayChanged(); |
| |
| /** |
| * Get the attributes available for display color sampling. |
| * @param displayId id of the display to collect the sample from. |
| * |
| * @return The attributes the display supports, or null if sampling is not supported. |
| */ |
| @Nullable |
| public abstract DisplayedContentSamplingAttributes getDisplayedContentSamplingAttributes( |
| int displayId); |
| |
| /** |
| * Enable or disable the collection of color samples. |
| * |
| * @param displayId id of the display to collect the sample from. |
| * @param componentMask a bitmask of the color channels to collect samples for, or zero for all |
| * available. |
| * @param maxFrames maintain a ringbuffer of the last maxFrames. |
| * @param enable True to enable, False to disable. |
| * |
| * @return True if sampling was enabled, false if failure. |
| */ |
| public abstract boolean setDisplayedContentSamplingEnabled( |
| int displayId, boolean enable, int componentMask, int maxFrames); |
| |
| /** |
| * Accesses the color histogram statistics of displayed frames on devices that support sampling. |
| * |
| * @param displayId id of the display to collect the sample from |
| * @param maxFrames limit the statistics to the last maxFrames number of frames. |
| * @param timestamp discard statistics that were collected prior to timestamp, where timestamp |
| * is given as CLOCK_MONOTONIC. |
| * @return The statistics representing a histogram of the color distribution of the frames |
| * displayed on-screen, or null if sampling is not supported. |
| */ |
| @Nullable |
| public abstract DisplayedContentSample getDisplayedContentSample( |
| int displayId, long maxFrames, long timestamp); |
| |
| /** |
| * Describes the requested power state of the display. |
| * |
| * This object is intended to describe the general characteristics of the |
| * power state, such as whether the screen should be on or off and the current |
| * brightness controls leaving the DisplayPowerController to manage the |
| * details of how the transitions between states should occur. The goal is for |
| * the PowerManagerService to focus on the global power state and not |
| * have to micro-manage screen off animations, auto-brightness and other effects. |
| */ |
| public static final class DisplayPowerRequest { |
| // Policy: Turn screen off as if the user pressed the power button |
| // including playing a screen off animation if applicable. |
| public static final int POLICY_OFF = 0; |
| // Policy: Enable dozing and always-on display functionality. |
| public static final int POLICY_DOZE = 1; |
| // Policy: Make the screen dim when the user activity timeout is |
| // about to expire. |
| public static final int POLICY_DIM = 2; |
| // Policy: Make the screen bright as usual. |
| public static final int POLICY_BRIGHT = 3; |
| // Policy: Keep the screen and display optimized for VR mode. |
| public static final int POLICY_VR = 4; |
| |
| // The basic overall policy to apply: off, doze, dim or bright. |
| public int policy; |
| |
| // If true, the proximity sensor overrides the screen state when an object is |
| // nearby, turning it off temporarily until the object is moved away. |
| public boolean useProximitySensor; |
| |
| // An override of the screen brightness. Set to -1 is used if there's no override. |
| public int screenBrightnessOverride; |
| |
| // An override of the screen auto-brightness adjustment factor in the range -1 (dimmer) to |
| // 1 (brighter). Set to Float.NaN if there's no override. |
| public float screenAutoBrightnessAdjustmentOverride; |
| |
| // If true, enables automatic brightness control. |
| public boolean useAutoBrightness; |
| |
| // If true, scales the brightness to a fraction of desired (as defined by |
| // screenLowPowerBrightnessFactor). |
| public boolean lowPowerMode; |
| |
| // The factor to adjust the screen brightness in low power mode in the range |
| // 0 (screen off) to 1 (no change) |
| public float screenLowPowerBrightnessFactor; |
| |
| // If true, applies a brightness boost. |
| public boolean boostScreenBrightness; |
| |
| // If true, prevents the screen from completely turning on if it is currently off. |
| // The display does not enter a "ready" state if this flag is true and screen on is |
| // blocked. The window manager policy blocks screen on while it prepares the keyguard to |
| // prevent the user from seeing intermediate updates. |
| // |
| // Technically, we may not block the screen itself from turning on (because that introduces |
| // extra unnecessary latency) but we do prevent content on screen from becoming |
| // visible to the user. |
| public boolean blockScreenOn; |
| |
| // Overrides the policy for adjusting screen brightness and state while dozing. |
| public int dozeScreenBrightness; |
| public int dozeScreenState; |
| |
| public DisplayPowerRequest() { |
| policy = POLICY_BRIGHT; |
| useProximitySensor = false; |
| screenBrightnessOverride = -1; |
| useAutoBrightness = false; |
| screenAutoBrightnessAdjustmentOverride = Float.NaN; |
| screenLowPowerBrightnessFactor = 0.5f; |
| blockScreenOn = false; |
| dozeScreenBrightness = PowerManager.BRIGHTNESS_DEFAULT; |
| dozeScreenState = Display.STATE_UNKNOWN; |
| } |
| |
| public DisplayPowerRequest(DisplayPowerRequest other) { |
| copyFrom(other); |
| } |
| |
| public boolean isBrightOrDim() { |
| return policy == POLICY_BRIGHT || policy == POLICY_DIM; |
| } |
| |
| public boolean isVr() { |
| return policy == POLICY_VR; |
| } |
| |
| public void copyFrom(DisplayPowerRequest other) { |
| policy = other.policy; |
| useProximitySensor = other.useProximitySensor; |
| screenBrightnessOverride = other.screenBrightnessOverride; |
| useAutoBrightness = other.useAutoBrightness; |
| screenAutoBrightnessAdjustmentOverride = other.screenAutoBrightnessAdjustmentOverride; |
| screenLowPowerBrightnessFactor = other.screenLowPowerBrightnessFactor; |
| blockScreenOn = other.blockScreenOn; |
| lowPowerMode = other.lowPowerMode; |
| boostScreenBrightness = other.boostScreenBrightness; |
| dozeScreenBrightness = other.dozeScreenBrightness; |
| dozeScreenState = other.dozeScreenState; |
| } |
| |
| @Override |
| public boolean equals(Object o) { |
| return o instanceof DisplayPowerRequest |
| && equals((DisplayPowerRequest)o); |
| } |
| |
| public boolean equals(DisplayPowerRequest other) { |
| return other != null |
| && policy == other.policy |
| && useProximitySensor == other.useProximitySensor |
| && screenBrightnessOverride == other.screenBrightnessOverride |
| && useAutoBrightness == other.useAutoBrightness |
| && floatEquals(screenAutoBrightnessAdjustmentOverride, |
| other.screenAutoBrightnessAdjustmentOverride) |
| && screenLowPowerBrightnessFactor |
| == other.screenLowPowerBrightnessFactor |
| && blockScreenOn == other.blockScreenOn |
| && lowPowerMode == other.lowPowerMode |
| && boostScreenBrightness == other.boostScreenBrightness |
| && dozeScreenBrightness == other.dozeScreenBrightness |
| && dozeScreenState == other.dozeScreenState; |
| } |
| |
| private boolean floatEquals(float f1, float f2) { |
| return f1 == f2 || Float.isNaN(f1) && Float.isNaN(f2); |
| } |
| |
| @Override |
| public int hashCode() { |
| return 0; // don't care |
| } |
| |
| @Override |
| public String toString() { |
| return "policy=" + policyToString(policy) |
| + ", useProximitySensor=" + useProximitySensor |
| + ", screenBrightnessOverride=" + screenBrightnessOverride |
| + ", useAutoBrightness=" + useAutoBrightness |
| + ", screenAutoBrightnessAdjustmentOverride=" |
| + screenAutoBrightnessAdjustmentOverride |
| + ", screenLowPowerBrightnessFactor=" + screenLowPowerBrightnessFactor |
| + ", blockScreenOn=" + blockScreenOn |
| + ", lowPowerMode=" + lowPowerMode |
| + ", boostScreenBrightness=" + boostScreenBrightness |
| + ", dozeScreenBrightness=" + dozeScreenBrightness |
| + ", dozeScreenState=" + Display.stateToString(dozeScreenState); |
| } |
| |
| public static String policyToString(int policy) { |
| switch (policy) { |
| case POLICY_OFF: |
| return "OFF"; |
| case POLICY_DOZE: |
| return "DOZE"; |
| case POLICY_DIM: |
| return "DIM"; |
| case POLICY_BRIGHT: |
| return "BRIGHT"; |
| case POLICY_VR: |
| return "VR"; |
| default: |
| return Integer.toString(policy); |
| } |
| } |
| } |
| |
| /** |
| * Asynchronous callbacks from the power controller to the power manager service. |
| */ |
| public interface DisplayPowerCallbacks { |
| void onStateChanged(); |
| void onProximityPositive(); |
| void onProximityNegative(); |
| void onDisplayStateChange(int state); // one of the Display state constants |
| |
| void acquireSuspendBlocker(); |
| void releaseSuspendBlocker(); |
| } |
| |
| /** |
| * Called within a Surface transaction whenever the size or orientation of a |
| * display may have changed. Provides an opportunity for the client to |
| * update the position of its surfaces as part of the same transaction. |
| */ |
| public interface DisplayTransactionListener { |
| void onDisplayTransaction(Transaction t); |
| } |
| } |