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/*
* Copyright (C) 2018 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package android.gameperformance;
import java.util.ArrayList;
import java.util.List;
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.graphics.PixelFormat;
import android.os.Handler;
import android.os.HandlerThread;
import android.os.Trace;
import android.view.Surface;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
/**
* Minimal SurfaceView that sends buffer on request.
*/
public class CustomSurfaceView extends SurfaceView implements SurfaceHolder.Callback {
// Tag for trace when buffer is requested.
public final static String LOCAL_REQUEST_BUFFER = "localRequestBuffer";
// Tag for trace when buffer is posted.
public final static String LOCAL_POST_BUFFER = "localPostBuffer";
private final Object mSurfaceLock = new Object();
// Keeps frame times. Used to calculate fps.
private List<Long> mFrameTimes;
// Surface to send.
private Surface mSurface;
private Handler mHandler;
private Runnable mInvalidateSurfaceTask = new Runnable() {
@Override
public void run() {
synchronized (mSurfaceLock) {
if (mSurface == null) {
return;
}
invalidateSurface(true, true);
mHandler.post(this);
}
}
};
public CustomSurfaceView(Context context) {
super(context);
mFrameTimes = new ArrayList<Long>();
getHolder().addCallback(this);
getHolder().setFormat(PixelFormat.OPAQUE);
HandlerThread thread = new HandlerThread("SurfaceInvalidator");
thread.start();
mHandler = new Handler(thread.getLooper());
}
/**
* Resets frame times in order to calculate fps for different test pass.
*/
public void resetFrameTimes() {
synchronized (mSurfaceLock) {
mFrameTimes.clear();
}
}
/**
* Returns current fps based on collected frame times.
*/
public double getFps() {
synchronized (mSurfaceLock) {
if (mFrameTimes.size() < 2) {
return 0.0f;
}
return 1000.0 * mFrameTimes.size() /
(mFrameTimes.get(mFrameTimes.size() - 1) - mFrameTimes.get(0));
}
}
/**
* Invalidates surface.
* @param traceCalls set to true in case we need register trace calls. Not used for warm-up.
* @param drawFps perform drawing current fps on surface to have some payload on surface.
*/
public void invalidateSurface(boolean traceCalls, boolean drawFps) {
synchronized (mSurfaceLock) {
if (mSurface == null) {
throw new IllegalStateException("Surface is not ready");
}
if (traceCalls) {
Trace.traceBegin(Trace.TRACE_TAG_GRAPHICS, LOCAL_REQUEST_BUFFER);
}
Canvas canvas = mSurface.lockHardwareCanvas();
if (traceCalls) {
Trace.traceEnd(Trace.TRACE_TAG_GRAPHICS);
}
if (drawFps) {
int textSize = canvas.getHeight() / 24;
Paint paint = new Paint();
paint.setTextSize(textSize);
paint.setColor(0xFFFF8040);
canvas.drawARGB(92, 255, 255, 255);
canvas.drawText("FPS: " + String.format("%.2f", getFps()), 10, 300, paint);
}
if (traceCalls) {
Trace.traceBegin(Trace.TRACE_TAG_GRAPHICS, LOCAL_POST_BUFFER);
}
mSurface.unlockCanvasAndPost(canvas);
if (traceCalls) {
Trace.traceEnd(Trace.TRACE_TAG_GRAPHICS);
}
mFrameTimes.add(System.currentTimeMillis());
}
}
/**
* Wait until surface is created and ready to use or return immediately if surface
* already exists.
*/
public void waitForSurfaceReady() {
synchronized (mSurfaceLock) {
if (mSurface == null) {
try {
mSurfaceLock.wait(5000);
} catch(InterruptedException e) {
e.printStackTrace();
}
}
if (mSurface == null)
throw new IllegalStateException("Surface is not ready.");
}
}
/**
* Waits until surface is destroyed or return immediately if surface does not exist.
*/
public void waitForSurfaceDestroyed() {
synchronized (mSurfaceLock) {
if (mSurface != null) {
try {
mSurfaceLock.wait(5000);
} catch(InterruptedException e) {
}
}
if (mSurface != null)
throw new IllegalStateException("Surface still exists.");
}
}
@Override
public void surfaceCreated(SurfaceHolder holder) {
}
@Override
public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
// This method is always called at least once, after surfaceCreated.
synchronized (mSurfaceLock) {
mSurface = holder.getSurface();
mSurfaceLock.notify();
mHandler.post(mInvalidateSurfaceTask);
}
}
@Override
public void surfaceDestroyed(SurfaceHolder holder) {
synchronized (mSurfaceLock) {
mHandler.removeCallbacks(mInvalidateSurfaceTask);
mSurface = null;
mSurfaceLock.notify();
}
}
}
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