| /* |
| * Copyright (C) 2012 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 com.android.server.display; |
| |
| import android.graphics.Rect; |
| import android.view.Display; |
| import android.view.DisplayInfo; |
| import android.view.Surface; |
| |
| import java.io.PrintWriter; |
| import java.util.Arrays; |
| import java.util.List; |
| |
| import libcore.util.Objects; |
| |
| /** |
| * Describes how a logical display is configured. |
| * <p> |
| * At this time, we only support logical displays that are coupled to a particular |
| * primary display device from which the logical display derives its basic properties |
| * such as its size, density and refresh rate. |
| * </p><p> |
| * A logical display may be mirrored onto multiple display devices in addition to its |
| * primary display device. Note that the contents of a logical display may not |
| * always be visible, even on its primary display device, such as in the case where |
| * the primary display device is currently mirroring content from a different |
| * logical display. |
| * </p><p> |
| * This object is designed to encapsulate as much of the policy of logical |
| * displays as possible. The idea is to make it easy to implement new kinds of |
| * logical displays mostly by making local changes to this class. |
| * </p><p> |
| * Note: The display manager architecture does not actually require logical displays |
| * to be associated with any individual display device. Logical displays and |
| * display devices are orthogonal concepts. Some mapping will exist between |
| * logical displays and display devices but it can be many-to-many and |
| * and some might have no relation at all. |
| * </p><p> |
| * Logical displays are guarded by the {@link DisplayManagerService.SyncRoot} lock. |
| * </p> |
| */ |
| final class LogicalDisplay { |
| private final DisplayInfo mBaseDisplayInfo = new DisplayInfo(); |
| |
| // The layer stack we use when the display has been blanked to prevent any |
| // of its content from appearing. |
| private static final int BLANK_LAYER_STACK = -1; |
| |
| private final int mDisplayId; |
| private final int mLayerStack; |
| private DisplayInfo mOverrideDisplayInfo; // set by the window manager |
| private DisplayInfo mInfo; |
| |
| // The display device that this logical display is based on and which |
| // determines the base metrics that it uses. |
| private DisplayDevice mPrimaryDisplayDevice; |
| private DisplayDeviceInfo mPrimaryDisplayDeviceInfo; |
| |
| // True if the logical display has unique content. |
| private boolean mHasContent; |
| |
| // The pending requested refresh rate. 0 if no request is pending. |
| private float mRequestedRefreshRate; |
| |
| // Temporary rectangle used when needed. |
| private final Rect mTempLayerStackRect = new Rect(); |
| private final Rect mTempDisplayRect = new Rect(); |
| |
| public LogicalDisplay(int displayId, int layerStack, DisplayDevice primaryDisplayDevice) { |
| mDisplayId = displayId; |
| mLayerStack = layerStack; |
| mPrimaryDisplayDevice = primaryDisplayDevice; |
| } |
| |
| /** |
| * Gets the logical display id of this logical display. |
| * |
| * @return The logical display id. |
| */ |
| public int getDisplayIdLocked() { |
| return mDisplayId; |
| } |
| |
| /** |
| * Gets the primary display device associated with this logical display. |
| * |
| * @return The primary display device. |
| */ |
| public DisplayDevice getPrimaryDisplayDeviceLocked() { |
| return mPrimaryDisplayDevice; |
| } |
| |
| /** |
| * Gets information about the logical display. |
| * |
| * @return The device info, which should be treated as immutable by the caller. |
| * The logical display should allocate a new display info object whenever |
| * the data changes. |
| */ |
| public DisplayInfo getDisplayInfoLocked() { |
| if (mInfo == null) { |
| mInfo = new DisplayInfo(); |
| if (mOverrideDisplayInfo != null) { |
| mInfo.copyFrom(mOverrideDisplayInfo); |
| mInfo.layerStack = mBaseDisplayInfo.layerStack; |
| mInfo.name = mBaseDisplayInfo.name; |
| mInfo.uniqueId = mBaseDisplayInfo.uniqueId; |
| mInfo.state = mBaseDisplayInfo.state; |
| } else { |
| mInfo.copyFrom(mBaseDisplayInfo); |
| } |
| } |
| return mInfo; |
| } |
| |
| /** |
| * Sets overridden logical display information from the window manager. |
| * This method can be used to adjust application insets, rotation, and other |
| * properties that the window manager takes care of. |
| * |
| * @param info The logical display information, may be null. |
| */ |
| public boolean setDisplayInfoOverrideFromWindowManagerLocked(DisplayInfo info) { |
| if (info != null) { |
| if (mOverrideDisplayInfo == null) { |
| mOverrideDisplayInfo = new DisplayInfo(info); |
| mInfo = null; |
| return true; |
| } |
| if (!mOverrideDisplayInfo.equals(info)) { |
| mOverrideDisplayInfo.copyFrom(info); |
| mInfo = null; |
| return true; |
| } |
| } else if (mOverrideDisplayInfo != null) { |
| mOverrideDisplayInfo = null; |
| mInfo = null; |
| return true; |
| } |
| return false; |
| } |
| |
| /** |
| * Returns true if the logical display is in a valid state. |
| * This method should be checked after calling {@link #updateLocked} to handle the |
| * case where a logical display should be removed because all of its associated |
| * display devices are gone or if it is otherwise no longer needed. |
| * |
| * @return True if the logical display is still valid. |
| */ |
| public boolean isValidLocked() { |
| return mPrimaryDisplayDevice != null; |
| } |
| |
| /** |
| * Updates the state of the logical display based on the available display devices. |
| * The logical display might become invalid if it is attached to a display device |
| * that no longer exists. |
| * |
| * @param devices The list of all connected display devices. |
| */ |
| public void updateLocked(List<DisplayDevice> devices) { |
| // Nothing to update if already invalid. |
| if (mPrimaryDisplayDevice == null) { |
| return; |
| } |
| |
| // Check whether logical display has become invalid. |
| if (!devices.contains(mPrimaryDisplayDevice)) { |
| mPrimaryDisplayDevice = null; |
| return; |
| } |
| |
| // Bootstrap the logical display using its associated primary physical display. |
| // We might use more elaborate configurations later. It's possible that the |
| // configuration of several physical displays might be used to determine the |
| // logical display that they are sharing. (eg. Adjust size for pixel-perfect |
| // mirroring over HDMI.) |
| DisplayDeviceInfo deviceInfo = mPrimaryDisplayDevice.getDisplayDeviceInfoLocked(); |
| if (!Objects.equal(mPrimaryDisplayDeviceInfo, deviceInfo)) { |
| mBaseDisplayInfo.layerStack = mLayerStack; |
| mBaseDisplayInfo.flags = 0; |
| if ((deviceInfo.flags & DisplayDeviceInfo.FLAG_SUPPORTS_PROTECTED_BUFFERS) != 0) { |
| mBaseDisplayInfo.flags |= Display.FLAG_SUPPORTS_PROTECTED_BUFFERS; |
| } |
| if ((deviceInfo.flags & DisplayDeviceInfo.FLAG_SECURE) != 0) { |
| mBaseDisplayInfo.flags |= Display.FLAG_SECURE; |
| } |
| if ((deviceInfo.flags & DisplayDeviceInfo.FLAG_PRIVATE) != 0) { |
| mBaseDisplayInfo.flags |= Display.FLAG_PRIVATE; |
| } |
| if ((deviceInfo.flags & DisplayDeviceInfo.FLAG_PRESENTATION) != 0) { |
| mBaseDisplayInfo.flags |= Display.FLAG_PRESENTATION; |
| } |
| mBaseDisplayInfo.type = deviceInfo.type; |
| mBaseDisplayInfo.address = deviceInfo.address; |
| mBaseDisplayInfo.name = deviceInfo.name; |
| mBaseDisplayInfo.uniqueId = deviceInfo.uniqueId; |
| mBaseDisplayInfo.appWidth = deviceInfo.width; |
| mBaseDisplayInfo.appHeight = deviceInfo.height; |
| mBaseDisplayInfo.logicalWidth = deviceInfo.width; |
| mBaseDisplayInfo.logicalHeight = deviceInfo.height; |
| mBaseDisplayInfo.rotation = Surface.ROTATION_0; |
| mBaseDisplayInfo.refreshRate = deviceInfo.refreshRate; |
| mBaseDisplayInfo.supportedRefreshRates = Arrays.copyOf( |
| deviceInfo.supportedRefreshRates, deviceInfo.supportedRefreshRates.length); |
| mBaseDisplayInfo.logicalDensityDpi = deviceInfo.densityDpi; |
| mBaseDisplayInfo.physicalXDpi = deviceInfo.xDpi; |
| mBaseDisplayInfo.physicalYDpi = deviceInfo.yDpi; |
| mBaseDisplayInfo.appVsyncOffsetNanos = deviceInfo.appVsyncOffsetNanos; |
| mBaseDisplayInfo.presentationDeadlineNanos = deviceInfo.presentationDeadlineNanos; |
| mBaseDisplayInfo.state = deviceInfo.state; |
| mBaseDisplayInfo.smallestNominalAppWidth = deviceInfo.width; |
| mBaseDisplayInfo.smallestNominalAppHeight = deviceInfo.height; |
| mBaseDisplayInfo.largestNominalAppWidth = deviceInfo.width; |
| mBaseDisplayInfo.largestNominalAppHeight = deviceInfo.height; |
| mBaseDisplayInfo.ownerUid = deviceInfo.ownerUid; |
| mBaseDisplayInfo.ownerPackageName = deviceInfo.ownerPackageName; |
| |
| mPrimaryDisplayDeviceInfo = deviceInfo; |
| mInfo = null; |
| } |
| } |
| |
| /** |
| * Applies the layer stack and transformation to the given display device |
| * so that it shows the contents of this logical display. |
| * |
| * We know that the given display device is only ever showing the contents of |
| * a single logical display, so this method is expected to blow away all of its |
| * transformation properties to make it happen regardless of what the |
| * display device was previously showing. |
| * |
| * The caller must have an open Surface transaction. |
| * |
| * The display device may not be the primary display device, in the case |
| * where the display is being mirrored. |
| * |
| * @param device The display device to modify. |
| * @param isBlanked True if the device is being blanked. |
| */ |
| public void configureDisplayInTransactionLocked(DisplayDevice device, |
| boolean isBlanked) { |
| final DisplayInfo displayInfo = getDisplayInfoLocked(); |
| final DisplayDeviceInfo displayDeviceInfo = device.getDisplayDeviceInfoLocked(); |
| |
| // Set the layer stack. |
| device.setLayerStackInTransactionLocked(isBlanked ? BLANK_LAYER_STACK : mLayerStack); |
| |
| // Set the refresh rate |
| device.requestRefreshRateLocked(mRequestedRefreshRate); |
| |
| // Set the viewport. |
| // This is the area of the logical display that we intend to show on the |
| // display device. For now, it is always the full size of the logical display. |
| mTempLayerStackRect.set(0, 0, displayInfo.logicalWidth, displayInfo.logicalHeight); |
| |
| // Set the orientation. |
| // The orientation specifies how the physical coordinate system of the display |
| // is rotated when the contents of the logical display are rendered. |
| int orientation = Surface.ROTATION_0; |
| if ((displayDeviceInfo.flags & DisplayDeviceInfo.FLAG_ROTATES_WITH_CONTENT) != 0) { |
| orientation = displayInfo.rotation; |
| } |
| |
| // Apply the physical rotation of the display device itself. |
| orientation = (orientation + displayDeviceInfo.rotation) % 4; |
| |
| // Set the frame. |
| // The frame specifies the rotated physical coordinates into which the viewport |
| // is mapped. We need to take care to preserve the aspect ratio of the viewport. |
| // Currently we maximize the area to fill the display, but we could try to be |
| // more clever and match resolutions. |
| boolean rotated = (orientation == Surface.ROTATION_90 |
| || orientation == Surface.ROTATION_270); |
| int physWidth = rotated ? displayDeviceInfo.height : displayDeviceInfo.width; |
| int physHeight = rotated ? displayDeviceInfo.width : displayDeviceInfo.height; |
| |
| // Determine whether the width or height is more constrained to be scaled. |
| // physWidth / displayInfo.logicalWidth => letter box |
| // or physHeight / displayInfo.logicalHeight => pillar box |
| // |
| // We avoid a division (and possible floating point imprecision) here by |
| // multiplying the fractions by the product of their denominators before |
| // comparing them. |
| int displayRectWidth, displayRectHeight; |
| if (physWidth * displayInfo.logicalHeight |
| < physHeight * displayInfo.logicalWidth) { |
| // Letter box. |
| displayRectWidth = physWidth; |
| displayRectHeight = displayInfo.logicalHeight * physWidth / displayInfo.logicalWidth; |
| } else { |
| // Pillar box. |
| displayRectWidth = displayInfo.logicalWidth * physHeight / displayInfo.logicalHeight; |
| displayRectHeight = physHeight; |
| } |
| int displayRectTop = (physHeight - displayRectHeight) / 2; |
| int displayRectLeft = (physWidth - displayRectWidth) / 2; |
| mTempDisplayRect.set(displayRectLeft, displayRectTop, |
| displayRectLeft + displayRectWidth, displayRectTop + displayRectHeight); |
| |
| device.setProjectionInTransactionLocked(orientation, mTempLayerStackRect, mTempDisplayRect); |
| } |
| |
| /** |
| * Returns true if the logical display has unique content. |
| * <p> |
| * If the display has unique content then we will try to ensure that it is |
| * visible on at least its primary display device. Otherwise we will ignore the |
| * logical display and perhaps show mirrored content on the primary display device. |
| * </p> |
| * |
| * @return True if the display has unique content. |
| */ |
| public boolean hasContentLocked() { |
| return mHasContent; |
| } |
| |
| /** |
| * Sets whether the logical display has unique content. |
| * |
| * @param hasContent True if the display has unique content. |
| */ |
| public void setHasContentLocked(boolean hasContent) { |
| mHasContent = hasContent; |
| } |
| |
| /** |
| * Requests the given refresh rate. |
| * @param requestedRefreshRate The desired refresh rate. |
| */ |
| public void setRequestedRefreshRateLocked(float requestedRefreshRate) { |
| mRequestedRefreshRate = requestedRefreshRate; |
| } |
| |
| /** |
| * Gets the pending requested refresh rate. |
| * |
| * @return The pending refresh rate requested |
| */ |
| public float getRequestedRefreshRateLocked() { |
| return mRequestedRefreshRate; |
| } |
| |
| public void dumpLocked(PrintWriter pw) { |
| pw.println("mDisplayId=" + mDisplayId); |
| pw.println("mLayerStack=" + mLayerStack); |
| pw.println("mHasContent=" + mHasContent); |
| pw.println("mPrimaryDisplayDevice=" + (mPrimaryDisplayDevice != null ? |
| mPrimaryDisplayDevice.getNameLocked() : "null")); |
| pw.println("mBaseDisplayInfo=" + mBaseDisplayInfo); |
| pw.println("mOverrideDisplayInfo=" + mOverrideDisplayInfo); |
| } |
| } |