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/*
* Copyright (C) 2017 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 org.chromium.latency.walt;
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Rect;
import android.os.Build;
import android.support.annotation.RequiresApi;
import android.util.AttributeSet;
import android.view.Surface;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.widget.Toast;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
class FastPathSurfaceView extends SurfaceView implements SurfaceHolder.Callback {
private boolean isActive = false;
public FastPathSurfaceView(Context context, AttributeSet attrs) {
super(context, attrs);
getHolder().addCallback(this);
setZOrderOnTop(true);
}
@RequiresApi(api = Build.VERSION_CODES.KITKAT)
@Override
public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
Surface surface = holder.getSurface();
if (surface == null)
return;
try {
Method setSharedBufferMode = Surface.class.getMethod("setSharedBufferMode", boolean.class);
setSharedBufferMode.invoke(surface, true);
displayMessage("Using shared buffer mode.");
} catch (NoSuchMethodException | InvocationTargetException | IllegalAccessException e) {
displayMessage("Shared buffer mode is not supported.");
}
Canvas canvas = surface.lockCanvas(null);
canvas.drawColor(Color.GRAY);
surface.unlockCanvasAndPost(canvas);
}
@Override
public void surfaceCreated(SurfaceHolder holder) {
isActive = true;
}
@Override
public void surfaceDestroyed(SurfaceHolder holder) {
isActive = false;
}
private void displayMessage(String message) {
Toast toast = Toast.makeText(getContext(), message, Toast.LENGTH_SHORT);
toast.show();
}
public void setRectColor(int color) {
Surface surface = getHolder().getSurface();
if (surface == null || !isActive)
return;
Rect rect = new Rect(10, 10, 310, 310);
Canvas canvas = surface.lockCanvas(rect);
Paint paint = new Paint();
paint.setColor(color);
canvas.drawRect(rect, paint);
surface.unlockCanvasAndPost(canvas);
}
}
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