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      1 /*
      2  * Copyright (C) 2018 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 android.gameperformance;
     17 
     18 import java.util.ArrayList;
     19 import java.util.List;
     20 import java.util.Random;
     21 
     22 import javax.microedition.khronos.egl.EGLConfig;
     23 import javax.microedition.khronos.opengles.GL10;
     24 
     25 import android.content.Context;
     26 import android.opengl.GLES20;
     27 import android.opengl.GLSurfaceView;
     28 
     29 public class CustomOpenGLView extends GLSurfaceView {
     30     private Random mRandom;
     31     private List<Long> mFrameTimes;
     32 
     33     public CustomOpenGLView(Context context) {
     34         super(context);
     35 
     36         mRandom = new Random();
     37         mFrameTimes = new ArrayList<Long>();
     38 
     39         setEGLContextClientVersion(2);
     40 
     41         setRenderer(new GLSurfaceView.Renderer() {
     42             @Override
     43             public void onSurfaceCreated(GL10 gl, EGLConfig config) {
     44                 GLES20.glClearColor(1.0f, 0.0f, 0.0f, 1.0f);
     45                 gl.glClearDepthf(1.0f);
     46                 gl.glEnable(GL10.GL_DEPTH_TEST);
     47                 gl.glDepthFunc(GL10.GL_LEQUAL);
     48 
     49                 gl.glHint(GL10.GL_PERSPECTIVE_CORRECTION_HINT,
     50                           GL10.GL_NICEST);            }
     51 
     52             @Override
     53             public void onSurfaceChanged(GL10 gl, int width, int height) {
     54                 GLES20.glViewport(0, 0, width, height);
     55             }
     56 
     57             @Override
     58             public void onDrawFrame(GL10 gl) {
     59                 GLES20.glClearColor(
     60                         mRandom.nextFloat(), mRandom.nextFloat(), mRandom.nextFloat(), 1.0f);
     61                 gl.glClear(GL10.GL_COLOR_BUFFER_BIT | GL10.GL_DEPTH_BUFFER_BIT);
     62                 synchronized (mFrameTimes) {
     63                     mFrameTimes.add(System.currentTimeMillis());
     64                 }
     65             }
     66         });
     67         setRenderMode(GLSurfaceView.RENDERMODE_CONTINUOUSLY);
     68     }
     69 
     70     /**
     71      * Resets frame times in order to calculate fps for different test pass.
     72      */
     73     public void resetFrameTimes() {
     74         synchronized (mFrameTimes) {
     75             mFrameTimes.clear();
     76         }
     77     }
     78 
     79     /**
     80      * Returns current fps based on collected frame times.
     81      */
     82     public double getFps() {
     83         synchronized (mFrameTimes) {
     84             if (mFrameTimes.size() < 2) {
     85                 return 0.0f;
     86             }
     87             return 1000.0 * mFrameTimes.size() /
     88                     (mFrameTimes.get(mFrameTimes.size() - 1) - mFrameTimes.get(0));
     89         }
     90     }
     91 }
     92