java - Java 7 中的抗锯齿发生了什么变化？

Question

我有一段代码，我用它来获取文本并生成一个带有阴影效果的图标以分配给各种组件(如下所示)。这在 Java 7 之前一直有效并且看起来很棒，其中抗锯齿逻辑发生了一些变化，现在看起来很糟糕，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不错，所以它似乎只发生在某些颜色组合中......

无论如何，有谁知道 Java 7 中的 AA 发生了什么变化，或者如何将其改回或使其像在 Java 6 中那样工作？或者我因违反 AA 而向谁投诉？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

抗锯齿确实在 Java7 中发生了变化。 link无论如何我现在还没有找到恢复它的方法，因为它看起来好像实际的 AA 代码在 Java7 中被更改了。所以你可以责怪 Oracle 破坏了 AA。我遇到的唯一解决方案是恢复到 Java6(这在最新版本的 OSX 上是不可能的)。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来自开源库的不同 AA 代码。希望对您有所帮助。