Java 7中的抗锯齿发生了什么？

Question

我有一段代码，用于获取文本并生成带阴影效果的图标以分配给各种组件（如下所示）。 在Java 7中，这种方法起到了很大作用，其中反锯齿逻辑中的某些内容发生了变化，现在看起来非常糟糕，而在Java 6中，相同的代码看起来很棒。

最后一张图片实际上看起来还不错，所以似乎只会出现某些颜色组合......

无论如何，有没有人知道Java 7中AA的变化，或者如何更改它或者像Java 6中那样工作？ 或者我为了打破AA而抱怨谁？ 哈哈...

在此先感谢您的帮助！

package mainpackage;

import java.awt.Color;
import java.awt.Dimension;
import java.awt.Font;
import java.awt.Graphics2D;
import java.awt.RenderingHints;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.awt.font.TextAttribute;
import java.awt.font.TextLayout;
import java.awt.image.BufferedImage;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.text.AttributedString;

import javax.imageio.ImageIO;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.SwingUtilities;

public class AntiAliasProblems
{
    private static final long serialVersionUID = 1L;
    private static Font font = new Font("Arial", Font.BOLD, 12);

    public static ImageIcon makeShadowIcon1()
    {
        AttributedString as = new AttributedString("Delete");
        as.addAttribute(TextAttribute.UNDERLINE, TextAttribute.UNDERLINE_ON, 0, 1);
        as.addAttribute(TextAttribute.FONT, font);      

        BufferedImage image = new BufferedImage(75, 23, BufferedImage.TRANSLUCENT);
        Graphics2D g2 = image.createGraphics(); 

        g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
        g2.setRenderingHint(RenderingHints.KEY_TEXT_ANTIALIASING, RenderingHints.VALUE_TEXT_ANTIALIAS_ON);
        g2.setRenderingHint(RenderingHints.KEY_FRACTIONALMETRICS, RenderingHints.VALUE_FRACTIONALMETRICS_ON);

        TextLayout textLayout = new TextLayout(as.getIterator(), g2.getFontRenderContext());                

        g2.setPaint(java.awt.Color.white);
        textLayout.draw(g2, 19, 17);

        g2.setPaint(new java.awt.Color(0x00, 0x3D, 0x76));
        textLayout.draw(g2, 19, 16);

        ByteArrayOutputStream baos = new ByteArrayOutputStream(1000);

        try
        {
            ImageIO.write(image, "png", baos);
            baos.flush();
            baos.close();
        }
        catch(IOException e)
        {
            e.printStackTrace();
        }

        g2.dispose();

        return new ImageIcon(baos.toByteArray());
    }

    public static ImageIcon makeShadowIcon2()
    {
        AttributedString as = new AttributedString("Delete");
        as.addAttribute(TextAttribute.UNDERLINE, TextAttribute.UNDERLINE_ON, 0, 1);
        as.addAttribute(TextAttribute.FONT, font);      

        BufferedImage image = new BufferedImage(75, 23, BufferedImage.TRANSLUCENT);
        Graphics2D g2 = image.createGraphics();     
        TextLayout textLayout = new TextLayout(as.getIterator(), g2.getFontRenderContext());    

        g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
        g2.setRenderingHint(RenderingHints.KEY_TEXT_ANTIALIASING, RenderingHints.VALUE_TEXT_ANTIALIAS_ON);
        g2.setRenderingHint(RenderingHints.KEY_FRACTIONALMETRICS, RenderingHints.VALUE_FRACTIONALMETRICS_ON);

        g2.setPaint(java.awt.Color.white);
        textLayout.draw(g2, 19, 17);

        g2.setPaint(new java.awt.Color(0x00, 0x3D, 0x76));
        textLayout.draw(g2, 19, 16);

        ByteArrayOutputStream baos = new ByteArrayOutputStream(1000);

        try
        {
            ImageIO.write(image, "png", baos);
            baos.flush();
            baos.close();
        }
        catch(IOException e)
        {
            e.printStackTrace();
        }

        g2.dispose();

        return new ImageIcon(baos.toByteArray());
    }

    public static ImageIcon makeShadowIcon3()
    {
        AttributedString as = new AttributedString("Delete");
        as.addAttribute(TextAttribute.UNDERLINE, TextAttribute.UNDERLINE_ON, 0, 1);
        as.addAttribute(TextAttribute.FONT, font);      

        BufferedImage image = new BufferedImage(75, 23, BufferedImage.TRANSLUCENT);
        Graphics2D g2 = image.createGraphics();     

        g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
        g2.setRenderingHint(RenderingHints.KEY_TEXT_ANTIALIASING, RenderingHints.VALUE_TEXT_ANTIALIAS_ON);
        g2.setRenderingHint(RenderingHints.KEY_FRACTIONALMETRICS, RenderingHints.VALUE_FRACTIONALMETRICS_ON);

        TextLayout textLayout = new TextLayout(as.getIterator(), g2.getFontRenderContext());        

        g2.setPaint(java.awt.Color.black);
        textLayout.draw(g2, 19, 15);

        g2.setPaint(java.awt.Color.white);
        textLayout.draw(g2, 19, 16);

        ByteArrayOutputStream baos = new ByteArrayOutputStream(1000);

        try
        {
            ImageIO.write(image, "png", baos);
            baos.flush();
            baos.close();
        }
        catch(IOException e)
        {
            e.printStackTrace();
        }

        g2.dispose();

        return new ImageIcon(baos.toByteArray());
    }

    public static void main(String s[])
    {
        SwingUtilities.invokeLater(new Runnable()
        {           
            @Override
            public void run()
            {
                JFrame frame = new JFrame("Anti-Alias Issue");

                frame.addWindowListener(new WindowAdapter()
                {
                    public void windowClosing(WindowEvent e)
                    {
                        System.exit(0);
                    }
                });

                JPanel panel = new JPanel();
                panel.setPreferredSize(new Dimension(300, 33));

                JButton button1 = new JButton(makeShadowIcon1());
                button1.setPreferredSize(new Dimension(75, 23));
                button1.setBackground(Color.PINK);

                JButton button2 = new JButton(makeShadowIcon2());
                button2.setPreferredSize(new Dimension(75, 23));
                button2.setBackground(Color.PINK);

                JButton button3 = new JButton(makeShadowIcon3());
                button3.setPreferredSize(new Dimension(75, 23));
                button3.setBackground(Color.PINK);

                panel.add(button1);
                panel.add(button2);
                panel.add(button3);

                frame.setContentPane(panel);
                frame.pack();
                frame.setVisible(true);
                frame.setLocationRelativeTo(null);
            }
        });     
    }
}

Answer 1

在Java7中确实改变了抗锯齿。 链接我还没有找到此时还原它，因为它看起来好像在Java7中更改了实际的AA代码。 所以你可以责怪甲骨文打破AA。 我遇到的唯一解决方案是恢复到Java6（这在OSX的最新版本中是不可能的）。 希望我能提供更多帮助，但我能想到的唯一解决方案是使用开源库中的不同AA代码。 希望这会有帮助。