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
361 lines
13 KiB
Java
361 lines
13 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.graphics.SurfaceTexture;
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import android.hardware.display.DisplayManager;
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import android.util.Slog;
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import android.view.Display;
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import android.view.DisplayInfo;
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import android.view.GestureDetector;
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import android.view.Gravity;
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import android.view.LayoutInflater;
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import android.view.MotionEvent;
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import android.view.ScaleGestureDetector;
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import android.view.TextureView;
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import android.view.View;
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import android.view.WindowManager;
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import android.view.TextureView.SurfaceTextureListener;
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import android.widget.TextView;
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import java.io.PrintWriter;
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/**
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* Manages an overlay window on behalf of {@link OverlayDisplayAdapter}.
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* <p>
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* This object must only be accessed on the UI thread.
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* No locks are held by this object and locks must not be held while making called into it.
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* </p>
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*/
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final class OverlayDisplayWindow {
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private static final String TAG = "OverlayDisplayWindow";
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private static final boolean DEBUG = false;
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private final float INITIAL_SCALE = 0.5f;
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private final float MIN_SCALE = 0.3f;
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private final float MAX_SCALE = 1.0f;
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private final float WINDOW_ALPHA = 0.8f;
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// When true, disables support for moving and resizing the overlay.
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// The window is made non-touchable, which makes it possible to
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// directly interact with the content underneath.
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private final boolean DISABLE_MOVE_AND_RESIZE = false;
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private final Context mContext;
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private final String mName;
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private final int mWidth;
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private final int mHeight;
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private final int mDensityDpi;
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private final int mGravity;
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private final Listener mListener;
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private final String mTitle;
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private final DisplayManager mDisplayManager;
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private final WindowManager mWindowManager;
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private final Display mDefaultDisplay;
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private final DisplayInfo mDefaultDisplayInfo = new DisplayInfo();
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private View mWindowContent;
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private WindowManager.LayoutParams mWindowParams;
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private TextureView mTextureView;
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private TextView mTitleTextView;
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private GestureDetector mGestureDetector;
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private ScaleGestureDetector mScaleGestureDetector;
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private boolean mWindowVisible;
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private int mWindowX;
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private int mWindowY;
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private float mWindowScale;
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private float mLiveTranslationX;
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private float mLiveTranslationY;
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private float mLiveScale = 1.0f;
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public OverlayDisplayWindow(Context context, String name,
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int width, int height, int densityDpi, int gravity, Listener listener) {
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mContext = context;
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mName = name;
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mWidth = width;
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mHeight = height;
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mDensityDpi = densityDpi;
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mGravity = gravity;
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mListener = listener;
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mTitle = context.getResources().getString(
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com.android.internal.R.string.display_manager_overlay_display_title,
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mName, mWidth, mHeight, mDensityDpi);
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mDisplayManager = (DisplayManager)context.getSystemService(
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Context.DISPLAY_SERVICE);
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mWindowManager = (WindowManager)context.getSystemService(
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Context.WINDOW_SERVICE);
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mDefaultDisplay = mWindowManager.getDefaultDisplay();
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updateDefaultDisplayInfo();
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createWindow();
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}
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public void show() {
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if (!mWindowVisible) {
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mDisplayManager.registerDisplayListener(mDisplayListener, null);
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if (!updateDefaultDisplayInfo()) {
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mDisplayManager.unregisterDisplayListener(mDisplayListener);
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return;
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}
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clearLiveState();
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updateWindowParams();
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mWindowManager.addView(mWindowContent, mWindowParams);
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mWindowVisible = true;
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}
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}
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public void dismiss() {
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if (mWindowVisible) {
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mDisplayManager.unregisterDisplayListener(mDisplayListener);
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mWindowManager.removeView(mWindowContent);
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mWindowVisible = false;
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}
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}
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public void relayout() {
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if (mWindowVisible) {
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updateWindowParams();
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mWindowManager.updateViewLayout(mWindowContent, mWindowParams);
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}
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}
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public void dump(PrintWriter pw) {
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pw.println(" mWindowVisible=" + mWindowVisible);
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pw.println(" mWindowX=" + mWindowX);
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pw.println(" mWindowY=" + mWindowY);
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pw.println(" mWindowScale=" + mWindowScale);
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pw.println(" mWindowParams=" + mWindowParams);
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if (mTextureView != null) {
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pw.println(" mTextureView.getScaleX()=" + mTextureView.getScaleX());
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pw.println(" mTextureView.getScaleY()=" + mTextureView.getScaleY());
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}
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pw.println(" mLiveTranslationX=" + mLiveTranslationX);
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pw.println(" mLiveTranslationY=" + mLiveTranslationY);
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pw.println(" mLiveScale=" + mLiveScale);
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}
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private boolean updateDefaultDisplayInfo() {
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if (!mDefaultDisplay.getDisplayInfo(mDefaultDisplayInfo)) {
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Slog.w(TAG, "Cannot show overlay display because there is no "
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+ "default display upon which to show it.");
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return false;
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}
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return true;
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}
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private void createWindow() {
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LayoutInflater inflater = LayoutInflater.from(mContext);
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mWindowContent = inflater.inflate(
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com.android.internal.R.layout.overlay_display_window, null);
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mWindowContent.setOnTouchListener(mOnTouchListener);
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mTextureView = (TextureView)mWindowContent.findViewById(
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com.android.internal.R.id.overlay_display_window_texture);
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mTextureView.setPivotX(0);
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mTextureView.setPivotY(0);
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mTextureView.getLayoutParams().width = mWidth;
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mTextureView.getLayoutParams().height = mHeight;
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mTextureView.setOpaque(false);
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mTextureView.setSurfaceTextureListener(mSurfaceTextureListener);
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mTitleTextView = (TextView)mWindowContent.findViewById(
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com.android.internal.R.id.overlay_display_window_title);
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mTitleTextView.setText(mTitle);
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mWindowParams = new WindowManager.LayoutParams(
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WindowManager.LayoutParams.TYPE_DISPLAY_OVERLAY);
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mWindowParams.flags |= WindowManager.LayoutParams.FLAG_LAYOUT_IN_SCREEN
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| WindowManager.LayoutParams.FLAG_LAYOUT_NO_LIMITS
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| WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE
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| WindowManager.LayoutParams.FLAG_NOT_TOUCH_MODAL
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| WindowManager.LayoutParams.FLAG_HARDWARE_ACCELERATED;
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if (DISABLE_MOVE_AND_RESIZE) {
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mWindowParams.flags |= WindowManager.LayoutParams.FLAG_NOT_TOUCHABLE;
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}
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mWindowParams.privateFlags |=
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WindowManager.LayoutParams.PRIVATE_FLAG_FORCE_HARDWARE_ACCELERATED;
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mWindowParams.alpha = WINDOW_ALPHA;
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mWindowParams.gravity = Gravity.TOP | Gravity.LEFT;
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mWindowParams.setTitle(mTitle);
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mGestureDetector = new GestureDetector(mContext, mOnGestureListener);
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mScaleGestureDetector = new ScaleGestureDetector(mContext, mOnScaleGestureListener);
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// Set the initial position and scale.
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// The position and scale will be clamped when the display is first shown.
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mWindowX = (mGravity & Gravity.LEFT) == Gravity.LEFT ?
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0 : mDefaultDisplayInfo.logicalWidth;
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mWindowY = (mGravity & Gravity.TOP) == Gravity.TOP ?
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0 : mDefaultDisplayInfo.logicalHeight;
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mWindowScale = INITIAL_SCALE;
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}
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private void updateWindowParams() {
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float scale = mWindowScale * mLiveScale;
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scale = Math.min(scale, (float)mDefaultDisplayInfo.logicalWidth / mWidth);
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scale = Math.min(scale, (float)mDefaultDisplayInfo.logicalHeight / mHeight);
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scale = Math.max(MIN_SCALE, Math.min(MAX_SCALE, scale));
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float offsetScale = (scale / mWindowScale - 1.0f) * 0.5f;
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int width = (int)(mWidth * scale);
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int height = (int)(mHeight * scale);
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int x = (int)(mWindowX + mLiveTranslationX - width * offsetScale);
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int y = (int)(mWindowY + mLiveTranslationY - height * offsetScale);
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x = Math.max(0, Math.min(x, mDefaultDisplayInfo.logicalWidth - width));
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y = Math.max(0, Math.min(y, mDefaultDisplayInfo.logicalHeight - height));
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if (DEBUG) {
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Slog.d(TAG, "updateWindowParams: scale=" + scale
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+ ", offsetScale=" + offsetScale
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+ ", x=" + x + ", y=" + y
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+ ", width=" + width + ", height=" + height);
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}
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mTextureView.setScaleX(scale);
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mTextureView.setScaleY(scale);
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mWindowParams.x = x;
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mWindowParams.y = y;
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mWindowParams.width = width;
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mWindowParams.height = height;
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}
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private void saveWindowParams() {
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mWindowX = mWindowParams.x;
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mWindowY = mWindowParams.y;
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mWindowScale = mTextureView.getScaleX();
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clearLiveState();
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}
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private void clearLiveState() {
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mLiveTranslationX = 0f;
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mLiveTranslationY = 0f;
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mLiveScale = 1.0f;
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}
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private final DisplayManager.DisplayListener mDisplayListener =
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new DisplayManager.DisplayListener() {
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@Override
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public void onDisplayAdded(int displayId) {
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}
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@Override
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public void onDisplayChanged(int displayId) {
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if (displayId == mDefaultDisplay.getDisplayId()) {
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if (updateDefaultDisplayInfo()) {
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relayout();
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} else {
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dismiss();
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}
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}
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}
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@Override
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public void onDisplayRemoved(int displayId) {
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if (displayId == mDefaultDisplay.getDisplayId()) {
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dismiss();
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}
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}
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};
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private final SurfaceTextureListener mSurfaceTextureListener =
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new SurfaceTextureListener() {
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@Override
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public void onSurfaceTextureAvailable(SurfaceTexture surface, int width, int height) {
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mListener.onWindowCreated(surface, mDefaultDisplayInfo.refreshRate);
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}
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@Override
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public boolean onSurfaceTextureDestroyed(SurfaceTexture surface) {
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mListener.onWindowDestroyed();
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return true;
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}
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@Override
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public void onSurfaceTextureSizeChanged(SurfaceTexture surface, int width, int height) {
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}
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@Override
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public void onSurfaceTextureUpdated(SurfaceTexture surface) {
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}
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};
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private final View.OnTouchListener mOnTouchListener = new View.OnTouchListener() {
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@Override
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public boolean onTouch(View view, MotionEvent event) {
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// Work in screen coordinates.
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final float oldX = event.getX();
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final float oldY = event.getY();
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event.setLocation(event.getRawX(), event.getRawY());
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mGestureDetector.onTouchEvent(event);
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mScaleGestureDetector.onTouchEvent(event);
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switch (event.getActionMasked()) {
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case MotionEvent.ACTION_UP:
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case MotionEvent.ACTION_CANCEL:
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saveWindowParams();
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break;
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}
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// Revert to window coordinates.
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event.setLocation(oldX, oldY);
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return true;
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}
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};
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private final GestureDetector.OnGestureListener mOnGestureListener =
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new GestureDetector.SimpleOnGestureListener() {
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@Override
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public boolean onScroll(MotionEvent e1, MotionEvent e2,
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float distanceX, float distanceY) {
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mLiveTranslationX -= distanceX;
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mLiveTranslationY -= distanceY;
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relayout();
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return true;
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}
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};
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private final ScaleGestureDetector.OnScaleGestureListener mOnScaleGestureListener =
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new ScaleGestureDetector.SimpleOnScaleGestureListener() {
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@Override
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public boolean onScale(ScaleGestureDetector detector) {
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mLiveScale *= detector.getScaleFactor();
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relayout();
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return true;
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}
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};
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/**
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* Watches for significant changes in the overlay display window lifecycle.
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*/
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public interface Listener {
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public void onWindowCreated(SurfaceTexture surfaceTexture, float refreshRate);
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public void onWindowDestroyed();
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}
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} |