本文介绍了Java2D图形消除锯齿的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧! 问题描述 29岁程序员,3月因学历无情被辞! 我是Java新手,尝试使用Java2D Graphics创建图像。但是输出结果是反锯齿的。我尝试了很多方法来纠正它,但不起作用。 public BufferedImage createNameOnButton(String label){ int messageWidth = 0; Font font = new Font(Arial,Font.PLAIN,11); BufferedImage bi = new BufferedImage( 10,10,BufferedImage.TYPE_INT_RGB); Graphics2D g2d =(Graphics2D)bi.getGraphics(); g2d.setRenderingHint( RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON); g2d.setRenderingHint( RenderingHints.KEY_TEXT_ANTIALIASING, RenderingHints.VALUE_TEXT_ANTIALIAS_ON); g2d.setRenderingHint( RenderingHints.KEY_FRACTIONALMETRICS, RenderingHints.VALUE_FRACTIONALMETRICS_ON); g2d.setFont(font); bi = g2d.getDeviceConfiguration() .createCompatibleImage(500,30,Transparency.BITMASK); FontMetrics fm = bi.getGraphics()。getFontMetrics(font); int messageHeight = fm.getHeight() - fm.getDescent(); for(char ch:label.toCharArray()){ messageWidth + = fm.charWidth(ch); } bi = bi.getSubimage(50,0,messageWidth + 10,fm.getHeight()); 图形g = bi.getGraphics(); g.setColor(Color.black); AttributedString as = new AttributedString(label); as.addAttribute(TextAttribute.FONT,font); g.drawString(as.getIterator(),5,messageHeight); g2d.dispose(); g.dispose(); 返回bi; } 任何人都可以帮我解决错误吗?解决方案假设您确实需要平滑(无别名)文本, TextLayout 可能会使这更简单。 FontRenderContext code> 构造函数可以管理反锯齿和小数指标设置。 附录:使用 g2d.setColor(Color .blue)似乎产生了预期的效果。 附录:在Mac OS X上, Pixie / Developer / Applications / Graphics Tools / 中的c $ c>应用程序可以方便地检查anti-alias像素。在其他平台上,可以使用 Zoom 。 / ** @see https://stackoverflow.com/questions/4285464 * / public class BITest extends JPanel { private BufferedImage image = createNameOnButton(Sample); public BITest(){ this.setPreferredSize(new Dimension( image.getWidth(),image.getHeight())); @Override protected void paintComponent(Graphics g){ super.paintComponent(g); g.drawImage(image,0,0,null); } public BufferedImage createNameOnButton(String label){ Font font = new Font(Arial,Font.PLAIN,64); FontRenderContext frc = new FontRenderContext(null,true,true); TextLayout layout = new TextLayout(label,font,frc); Rectangle r = layout.getPixelBounds(null,0,0); System.out.println(r); BufferedImage bi = new BufferedImage( r.width + 1,r.height + 1, BufferedImage.TYPE_INT_ARGB); Graphics2D g2d =(Graphics2D)bi.getGraphics(); g2d.setColor(Color.blue); layout.draw(g2d,0,-r.y); g2d.dispose(); 返回bi; private void display(){ JFrame f = new JFrame(BITest); f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); f.setUndecorated(true); f.add(this); f.pack(); f.setLocationRelativeTo(null); f.setVisible(true); public static void main(String [] args){ EventQueue.invokeLater(new Runnable(){ $ b $ @Override public void run(){ new BITest()。display(); } }); } } I am new to Java and trying to use Java2D Graphics to create a Image. But the output is coming as anti-aliased. I tried many ways to rectify it but doesn't work. The characters are getting distorted or jagged.public BufferedImage createNameOnButton(String label) { int messageWidth = 0; Font font = new Font("Arial", Font.PLAIN, 11); BufferedImage bi = new BufferedImage( 10, 10, BufferedImage.TYPE_INT_RGB); Graphics2D g2d = (Graphics2D) bi.getGraphics(); g2d.setRenderingHint( RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON); g2d.setRenderingHint( RenderingHints.KEY_TEXT_ANTIALIASING, RenderingHints.VALUE_TEXT_ANTIALIAS_ON); g2d.setRenderingHint( RenderingHints.KEY_FRACTIONALMETRICS, RenderingHints.VALUE_FRACTIONALMETRICS_ON); g2d.setFont(font); bi = g2d.getDeviceConfiguration() .createCompatibleImage(500, 30, Transparency.BITMASK); FontMetrics fm = bi.getGraphics().getFontMetrics(font); int messageHeight = fm.getHeight() - fm.getDescent(); for (char ch : label.toCharArray()) { messageWidth += fm.charWidth(ch); } bi = bi.getSubimage(50, 0, messageWidth + 10, fm.getHeight()); Graphics g = bi.getGraphics(); g.setColor(Color.black); AttributedString as = new AttributedString(label); as.addAttribute(TextAttribute.FONT, font); g.drawString(as.getIterator(), 5, messageHeight); g2d.dispose(); g.dispose(); return bi;}Can anyone please help me to rectify the error? 解决方案 Assuming you actually want smooth (non-aliased) text, TextLayout may make this easier. The FontRenderContext constructor can manage the anti-aliasing and fractional metrics settings.Addendum: Using g2d.setColor(Color.blue) seems to produce the expected effect.Addendum: On Mac OS X, the Pixie application in /Developer/Applications/Graphics Tools/ is convenient for examining the anti-alias pixels. On other platforms, Zoom may be used./** @see https://stackoverflow.com/questions/4285464 */public class BITest extends JPanel { private BufferedImage image = createNameOnButton("Sample"); public BITest() { this.setPreferredSize(new Dimension( image.getWidth(), image.getHeight())); } @Override protected void paintComponent(Graphics g) { super.paintComponent(g); g.drawImage(image, 0, 0, null); } public BufferedImage createNameOnButton(String label) { Font font = new Font("Arial", Font.PLAIN, 64); FontRenderContext frc = new FontRenderContext(null, true, true); TextLayout layout = new TextLayout(label, font, frc); Rectangle r = layout.getPixelBounds(null, 0, 0); System.out.println(r); BufferedImage bi = new BufferedImage( r.width + 1, r.height + 1, BufferedImage.TYPE_INT_ARGB); Graphics2D g2d = (Graphics2D) bi.getGraphics(); g2d.setColor(Color.blue); layout.draw(g2d, 0, -r.y); g2d.dispose(); return bi; } private void display() { JFrame f = new JFrame("BITest"); f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); f.setUndecorated(true); f.add(this); f.pack(); f.setLocationRelativeTo(null); f.setVisible(true); } public static void main(String[] args) { EventQueue.invokeLater(new Runnable() { @Override public void run() { new BITest().display(); } }); }} 这篇关于Java2D图形消除锯齿的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持! 上岸,阿里云!