com.badlogic.gdx.graphics.FPSLogger.java Source code

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Here is the source code for com.badlogic.gdx.graphics.FPSLogger.java

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/*******************************************************************************
 * Copyright 2011 See AUTHORS file.
 * 
 * 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 com.badlogic.gdx.graphics;

import com.badlogic.gdx.Gdx;
import com.badlogic.gdx.utils.TimeUtils;

/** A simple helper class to log the frames per seconds achieved. Just invoke the {@link #log()} method in your rendering method.
 * The output will be logged once per second.
 * 
 * @author mzechner */
public class FPSLogger {
    long startTime;

    public FPSLogger() {
        startTime = TimeUtils.nanoTime();
    }

    /** Logs the current frames per second to the console. */
    public void log() {
        if (TimeUtils.nanoTime() - startTime > 1000000000) /* 1,000,000,000ns == one second */ {
            Gdx.app.log("FPSLogger", "fps: " + Gdx.graphics.getFramesPerSecond());
            startTime = TimeUtils.nanoTime();
        }
    }
}