JDK14/Java14源码在线阅读

/*
 *
 * Copyright (c) 2007, 2018, Oracle and/or its affiliates. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 *   - Redistributions of source code must retain the above copyright
 *     notice, this list of conditions and the following disclaimer.
 *
 *   - Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimer in the
 *     documentation and/or other materials provided with the distribution.
 *
 *   - Neither the name of Oracle nor the names of its
 *     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,
 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
package java2d.demos.Composite;


import static java.awt.Color.BLACK;
import static java.awt.Color.BLUE;
import static java.awt.Color.CYAN;
import static java.awt.Color.GREEN;
import static java.awt.Color.LIGHT_GRAY;
import static java.awt.Color.MAGENTA;
import static java.awt.Color.ORANGE;
import static java.awt.Color.PINK;
import static java.awt.Color.RED;
import static java.awt.Color.WHITE;
import static java.awt.Color.YELLOW;
import java.awt.AlphaComposite;
import java.awt.Color;
import java.awt.Graphics2D;
import java.awt.Image;
import java.awt.Shape;
import java.awt.font.TextLayout;
import java.awt.geom.Ellipse2D;
import java.awt.geom.Rectangle2D;
import java.awt.geom.RoundRectangle2D;
import java2d.Surface;


/**
 * Compositing shapes on images.
 */
@SuppressWarnings("serial")
public class ACimages extends Surface {

    private static final String[] s = { "box", "fight", "magnify",
        "boxwave", "globe", "snooze",
        "tip", "thumbsup", "dukeplug" };
    private static Image[] imgs = new Image[s.length];
    private static Color[] colors = { BLUE, CYAN, GREEN,
        MAGENTA, ORANGE, PINK, RED, YELLOW, LIGHT_GRAY };

    public ACimages() {
        setBackground(WHITE);
        for (int i = 0; i < imgs.length; i++) {
            imgs[i] = getImage(s[i] + ".png");
        }
    }

    @Override
    public void render(int w, int h, Graphics2D g2) {

        float alpha = 0.0f;
        int iw = w / 3;
        int ih = (h - 45) / 3;
        float xx = 0, yy = 15;

        for (int i = 0; i < imgs.length; i++) {

            xx = (i % 3 == 0) ? 0 : xx + w / 3;
            switch (i) {
                case 3:
                    yy = h / 3 + 15;
                    break;
                case 6:
                    yy = h / 3 * 2 + 15;
            }

            g2.setComposite(AlphaComposite.SrcOver);
            g2.setColor(BLACK);
            AlphaComposite ac = AlphaComposite.SrcOver.derive(alpha += .1f);
            String str = "a=" + Float.toString(alpha).substring(0, 3);
            new TextLayout(str, g2.getFont(), g2.getFontRenderContext()).draw(g2, xx
                    + 3, yy - 2);

            Shape shape = null;

            switch (i % 3) {
                case 0:
                    shape = new Ellipse2D.Float(xx, yy, iw, ih);
                    break;
                case 1:

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