JDK14/Java14源码在线阅读

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 *
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 *     notice, this list of conditions and the following disclaimer.
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 *     notice, this list of conditions and the following disclaimer in the
 *     documentation and/or other materials provided with the distribution.
 *
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 *     contributors may be used to endorse or promote products derived
 *     from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
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 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
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/*
 * This source code is provided to illustrate the usage of a given feature
 * or technique and has been deliberately simplified. Additional steps
 * required for a production-quality application, such as security checks,
 * input validation and proper error handling, might not be present in
 * this sample code.
 */


package j2dbench;

import java.awt.Canvas;
import java.awt.Image;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Dimension;
import java.awt.AlphaComposite;
import java.awt.Color;
import java.awt.Toolkit;
import java.util.Hashtable;

import j2dbench.tests.GraphicsTests;

public class TestEnvironment implements Node.Visitor {
    static Group globaloptroot;
    static Group envroot;

    static Option.Int outputWidth;
    static Option.Int outputHeight;

    static Option.Int runCount;
    static Option.Int repCount;
    static Option.Int testTime;

    public static void init() {
        globaloptroot = new Group("global", "Global Options");
        envroot = new Group(globaloptroot, "env", "Test Environment Options");

        outputWidth =
            new Option.Int(envroot, "outputwidth",
                           "Width of Output Window or Image",
                           1, Integer.MAX_VALUE, 640);
        outputHeight =
            new Option.Int(envroot, "outputheight",
                           "Height of Output Window or Image",
                           1, Integer.MAX_VALUE, 480);

        runCount =
            new Option.Int(envroot, "runcount",
                           "Fixed Number of Test Runs per Benchmark",
                           1, Integer.MAX_VALUE, 5);
        repCount =
            new Option.Int(envroot, "repcount",
                           "Fixed Number of Reps (0 means calibrate)",
                           0, Integer.MAX_VALUE, 0);
        testTime =
            new Option.Int(envroot, "testtime",
                           "Target test time to calibrate for",
                           1, Integer.MAX_VALUE, 2500);
    }

    public void visit(Node node) {
        if (node instanceof Test) {
            ((Test) node).runTest(this);
        }
    }

    public void runAllTests() {
        Group.root.traverse(this);
    }

    Canvas comp;
    Image testImage;
    Image srcImage;
    boolean stopped;
    ResultSet results;
    Hashtable modifiers;
    Timer timer;

    public TestEnvironment() {
        results = new ResultSet();
        modifiers = new Hashtable();
        timer = Timer.getImpl();
    }

    public void startTiming() {
        timer.start();
    }

    public void stopTiming() {
        timer.stop();
    }

    public long getTimeMillis() {
        return timer.getTimeMillis();
    }

    public long getTimeNanos() {
        return timer.getTimeNanos();
    }

    public Canvas getCanvas() {
        if (comp == null) {
            final int w = getWidth();
            final int h = getHeight();
            comp = new Canvas() {
                public Dimension getPreferredSize() {
                    return new Dimension(w, h);
                }
            };
        }
        return comp;
    }

    public Image getSrcImage() {
        return srcImage;
    }

    public void stop() {
        stopped = true;
    }

    public boolean isStopped() {
        return stopped;
    }

    public void setTestImage(Image img) {
        this.testImage = img;
    }

    public void setSrcImage(Image img) {
        this.srcImage = img;
    }

    public void erase() {
        Graphics g = getGraphics();
        if (g != null) {
            g.setColor(Color.white);
            g.fillRect(0, 0, getWidth(), getHeight());
            g.dispose();
        }
    }

    public Graphics getGraphics() {
        if (testImage != null) {
            return testImage.getGraphics();
        }
        if (comp != null) {
            return comp.getGraphics();
        }
        return null;
    }

    public int getWidth() {
        return outputWidth.getIntValue();
    }

    public int getHeight() {
        return outputHeight.getIntValue();
    }

    public int getRunCount() {
        return runCount.getIntValue();
    }

    public int getRepCount() {
        return repCount.getIntValue();
    }

    public long getTestTime() {
        return testTime.getIntValue();
    }

    public void sync() {
        if (comp == null) {
            Toolkit.getDefaultToolkit().sync();
        } else {
            comp.getToolkit().sync();
        }
    }

    public boolean idle() {
        if (!stopped) {
            sync();
            System.gc();
            System.runFinalization();
            System.gc();
            sync();
            try {
                Thread.sleep(50);
            } catch (InterruptedException e) {
                stop();
            }
        }
        return stopped;
    }

    public void setModifier(Modifier o, Object v) {
        modifiers.put(o, v);
    }

    public Object getModifier(Modifier o) {
        return modifiers.get(o);
    }

    public boolean isEnabled(Modifier o) {
        return ((Boolean) modifiers.get(o)).booleanValue();
    }

    public int getIntValue(Modifier o) {
        return ((Integer) modifiers.get(o)).intValue();
    }

    public void removeModifier(Modifier o) {
        modifiers.remove(o);
    }

    public Hashtable getModifiers() {
        return (Hashtable) modifiers.clone();
    }

    public void record(Result result) {
        results.record(result);
    }

    public void flushToScreen() {
        if (testImage != null && comp != null) {
            Graphics g = comp.getGraphics();
            if (GraphicsTests.hasGraphics2D) {
                ((Graphics2D) g).setComposite(AlphaComposite.Src);
            }
            g.drawImage(testImage, 0, 0, null);
            g.dispose();
        }
    }

    public void summarize() {
        results.summarize();
    }

    private abstract static class Timer {
        public static Timer getImpl() {
            try {
                System.nanoTime();
                return new Nanos();
            } catch (NoSuchMethodError e) {
                return new Millis();
            }
        }

        public abstract void start();
        public abstract void stop();
        public abstract long getTimeMillis();
        public abstract long getTimeNanos();

        private static class Millis extends Timer {
            private long millis;


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