4ed8fe75e1
Added more complete support for logical displays with support for mirroring, rotation and scaling. Improved the overlay display adapter's touch interactions. A big change here is that the display manager no longer relies on a single-threaded model to maintain its synchronization invariants. Unfortunately we had to change this so as to play nice with the fact that the window manager wants to own the surface flinger transaction around display and surface manipulations. As a result, the display manager has to be able to update displays from the context of any thread. It would be nice to make this process more cooperative. There are already several components competing to perform surface flinger transactions including the window manager, display manager, electron beam, overlay display window, and mouse pointer. They are not manipulating the same surfaces but they can collide with one another when they make global changes to the displays. Change-Id: I04f448594241f2004f6f3d1a81ccd12c566bf296
69 lines
2.4 KiB
Java
69 lines
2.4 KiB
Java
/*
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* Copyright (C) 2012 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.android.server.display;
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import android.content.Context;
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import android.os.Handler;
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import android.util.DisplayMetrics;
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/**
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* Provides a fake default display for headless systems.
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* <p>
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* Display adapters are guarded by the {@link DisplayManagerService.SyncRoot} lock.
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* </p>
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*/
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final class HeadlessDisplayAdapter extends DisplayAdapter {
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private static final String TAG = "HeadlessDisplayAdapter";
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public HeadlessDisplayAdapter(DisplayManagerService.SyncRoot syncRoot,
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Context context, Handler handler, Listener listener) {
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super(syncRoot, context, handler, listener, TAG);
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}
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@Override
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public void registerLocked() {
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super.registerLocked();
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sendDisplayDeviceEventLocked(new HeadlessDisplayDevice(), DISPLAY_DEVICE_EVENT_ADDED);
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}
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private final class HeadlessDisplayDevice extends DisplayDevice {
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private DisplayDeviceInfo mInfo;
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public HeadlessDisplayDevice() {
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super(HeadlessDisplayAdapter.this, null);
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}
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@Override
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public DisplayDeviceInfo getDisplayDeviceInfoLocked() {
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if (mInfo == null) {
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mInfo = new DisplayDeviceInfo();
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mInfo.name = getContext().getResources().getString(
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com.android.internal.R.string.display_manager_built_in_display_name);
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mInfo.width = 640;
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mInfo.height = 480;
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mInfo.refreshRate = 60;
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mInfo.densityDpi = DisplayMetrics.DENSITY_DEFAULT;
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mInfo.xDpi = 160;
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mInfo.yDpi = 160;
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mInfo.flags = DisplayDeviceInfo.FLAG_DEFAULT_DISPLAY
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| DisplayDeviceInfo.FLAG_SECURE;
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}
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return mInfo;
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}
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}
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}
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