services/core/java/com/android/server/wm/TaskScreenshotAnimatable.java

   1 /*
   2  * Copyright (C) 2019 The Android Open Source Project
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at
   7  *
   8  *      http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  */
  16 package com.android.server.wm;
  17
  18 import static com.android.server.wm.WindowManagerDebugConfig.DEBUG_RECENTS_ANIMATIONS;
  19
  20 import android.graphics.GraphicBuffer;
  21 import android.graphics.Rect;
  22 import android.util.Slog;
  23 import android.view.Surface;
  24 import android.view.SurfaceControl;
  25 import android.view.SurfaceSession;
  26
  27 /**
  28  * Class used by {@link RecentsAnimationController} to create a surface control with taking
  29  * screenshot of task when canceling recents animation.
  30  *
  31  * @see {@link RecentsAnimationController#setCancelOnNextTransitionStart}
  32  */
  33 class TaskScreenshotAnimatable implements SurfaceAnimator.Animatable {
  34     private static final String TAG = "TaskScreenshotAnim";
  35     private Task mTask;
  36     private SurfaceControl mSurfaceControl;
  37     private int mWidth;
  38     private int mHeight;
  39
  40     public static TaskScreenshotAnimatable create(Task task) {
  41         return new TaskScreenshotAnimatable(task, getBufferFromTask(task));
  42     }
  43
  44     private static SurfaceControl.ScreenshotGraphicBuffer getBufferFromTask(Task task) {
  45         if (task == null) {
  46             return null;
  47         }
  48         final Rect tmpRect = task.getBounds();
  49         tmpRect.offset(0, 0);
  50         return SurfaceControl.captureLayers(
  51                 task.getSurfaceControl().getHandle(), tmpRect, 1f);
  52     }
  53
  54     private TaskScreenshotAnimatable(Task task,
  55             SurfaceControl.ScreenshotGraphicBuffer screenshotBuffer) {
  56         GraphicBuffer buffer = screenshotBuffer == null
  57                 ? null : screenshotBuffer.getGraphicBuffer();
  58         mTask = task;
  59         mWidth = (buffer != null) ? buffer.getWidth() : 1;
  60         mHeight = (buffer != null) ? buffer.getHeight() : 1;
  61         if (DEBUG_RECENTS_ANIMATIONS) {
  62             Slog.d(TAG, "Creating TaskScreenshotAnimatable: task: " + task
  63                     + "width: " + mWidth + "height: " + mHeight);
  64         }
  65         mSurfaceControl = new SurfaceControl.Builder(new SurfaceSession())
  66                 .setName("RecentTaskScreenshotSurface")
  67                 .setBufferSize(mWidth, mHeight)
  68                 .build();
  69         if (buffer != null) {
  70             final Surface surface = new Surface();
  71             surface.copyFrom(mSurfaceControl);
  72             surface.attachAndQueueBufferWithColorSpace(buffer, screenshotBuffer.getColorSpace());
  73             surface.release();
  74         }
  75         getPendingTransaction().show(mSurfaceControl);
  76     }
  77
  78     @Override
  79     public SurfaceControl.Transaction getPendingTransaction() {
  80         return mTask.getPendingTransaction();
  81     }
  82
  83     @Override
  84     public void commitPendingTransaction() {
  85         mTask.commitPendingTransaction();
  86     }
  87
  88     @Override
  89     public void onAnimationLeashCreated(SurfaceControl.Transaction t, SurfaceControl leash) {
  90         t.setLayer(leash, 1);
  91     }
  92
  93     @Override
  94     public void onAnimationLeashLost(SurfaceControl.Transaction t) {
  95         if (mSurfaceControl != null) {
  96             t.remove(mSurfaceControl);
  97             mSurfaceControl = null;
  98         }
  99     }
 100
 101     @Override
 102     public SurfaceControl.Builder makeAnimationLeash() {
 103         return mTask.makeAnimationLeash();
 104     }
 105
 106     @Override
 107     public SurfaceControl getAnimationLeashParent() {
 108         return mTask.getAnimationLeashParent();
 109     }
 110
 111     @Override
 112     public SurfaceControl getSurfaceControl() {
 113         return mSurfaceControl;
 114     }
 115
 116     @Override
 117     public SurfaceControl getParentSurfaceControl() {
 118         return mTask.mSurfaceControl;
 119     }
 120
 121     @Override
 122     public int getSurfaceWidth() {
 123         return mWidth;
 124     }
 125
 126     @Override
 127     public int getSurfaceHeight() {
 128         return mHeight;
 129     }
 130 }