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      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 
     17 package com.android.test.hwui;
     18 
     19 import android.animation.ObjectAnimator;
     20 import android.app.Activity;
     21 import android.graphics.Color;
     22 import android.graphics.HardwareRenderer;
     23 import android.graphics.Paint;
     24 import android.graphics.RecordingCanvas;
     25 import android.graphics.RenderNode;
     26 import android.os.Bundle;
     27 import android.os.Handler;
     28 import android.view.SurfaceHolder;
     29 
     30 public class CustomRenderer extends Activity {
     31     private RenderNode mRootNode = new RenderNode("CustomRenderer");
     32     private RenderNode mChildNode = new RenderNode("RedBox");
     33     private HardwareRenderer mRenderer = new HardwareRenderer();
     34     private ObjectAnimator mAnimator;
     35     private Handler mRedrawHandler = new Handler(true);
     36 
     37     @Override
     38     protected void onCreate(Bundle savedInstanceState) {
     39         super.onCreate(savedInstanceState);
     40         getWindow().takeSurface(mSurfaceCallbacks);
     41     }
     42 
     43     @Override
     44     protected void onStart() {
     45         super.onStart();
     46         mAnimator = ObjectAnimator.ofFloat(mChildNode, "translationY", 0, 300);
     47         mAnimator.setRepeatMode(ObjectAnimator.REVERSE);
     48         mAnimator.setRepeatCount(ObjectAnimator.INFINITE);
     49         final Runnable redraw = this::draw;
     50         mAnimator.addUpdateListener(animation -> {
     51             mRedrawHandler.post(redraw);
     52         });
     53     }
     54 
     55     @Override
     56     protected void onStop() {
     57         super.onStop();
     58         mAnimator.end();
     59         mAnimator = null;
     60     }
     61 
     62     private void setupRoot(int width, int height) {
     63         mRootNode.setPosition(0, 0, width, height);
     64 
     65         RecordingCanvas canvas = mRootNode.beginRecording();
     66         canvas.drawColor(Color.WHITE);
     67         Paint paint = new Paint(Paint.ANTI_ALIAS_FLAG);
     68         paint.setColor(Color.BLACK);
     69         paint.setTextAlign(Paint.Align.CENTER);
     70         float textSize = Math.min(width, height) * .05f;
     71         paint.setTextSize(textSize);
     72         canvas.drawText("Hello custom renderer!", width / 2, textSize * 2, paint);
     73 
     74         canvas.translate(0, height / 4);
     75         canvas.drawRenderNode(mChildNode);
     76         canvas.translate(width / 2, 0);
     77         canvas.drawRenderNode(mChildNode);
     78         mRootNode.endRecording();
     79 
     80         setupChild(width / 2, height / 2);
     81     }
     82 
     83     private void setupChild(int width, int height) {
     84         mChildNode.setPosition(0, 0, width, height);
     85         mChildNode.setScaleX(.5f);
     86         mChildNode.setScaleY(.5f);
     87 
     88         RecordingCanvas canvas = mChildNode.beginRecording();
     89         canvas.drawColor(Color.RED);
     90         mChildNode.endRecording();
     91     }
     92 
     93     private void draw() {
     94         // Since we are constantly pumping frames between onStart & onStop we don't really
     95         // care about any errors that may happen. They will self-correct.
     96         mRenderer.createRenderRequest()
     97                 .setVsyncTime(System.nanoTime())
     98                 .syncAndDraw();
     99     }
    100 
    101     private SurfaceHolder.Callback2 mSurfaceCallbacks = new SurfaceHolder.Callback2() {
    102 
    103         @Override
    104         public void surfaceRedrawNeeded(SurfaceHolder holder) {
    105         }
    106 
    107         @Override
    108         public void surfaceCreated(SurfaceHolder holder) {
    109         }
    110 
    111         @Override
    112         public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
    113             setupRoot(width, height);
    114 
    115             mRenderer.setContentRoot(mRootNode);
    116             mRenderer.setSurface(holder.getSurface());
    117             draw();
    118             if (!mAnimator.isStarted()) {
    119                 mAnimator.start();
    120             }
    121         }
    122 
    123         @Override
    124         public void surfaceDestroyed(SurfaceHolder holder) {
    125             mRenderer.destroy();
    126         }
    127     };
    128 }
    129