Swing方法类似于HTML5的canvas.putImageData（arrayOfPixels，0,0） [英] Swing method akin to HTML5's canvas.putImageData(arrayOfPixels, 0,0)
本文介绍了Swing方法类似于HTML5的canvas.putImageData（arrayOfPixels，0,0）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
我有一些Javascript代码作用于像这样定义的像素数组：
screen = {'width'：160 ，'height'：144，'data'：new Array（160 * 144 * 4）};
...
canvas.putImageData（GPU._scrn，0,0）;
其中屏幕是宽度为*高度的1D数组* 4表示颜色的值，详细信息如下： https://developer.mozilla.org/En/HTML/Canvas/Pixel_manipulation_with_canvas p>
有一个方便的方法来绘制这个数组到屏幕上吗？如果没有，使用Swing绘制数组最简单的方法是什么？
解决方案
BufferedImage 可能是最灵活的选择。您可以使用图标或覆盖 paintComponent（），完全通用 Java2D 。
包溢出;
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.GridLayout;
import java.awt.image.BufferedImage;
import java.util.ArrayList;
import java.util.List;
import javax.swing.Icon;
import javax.swing.ImageIcon;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.SwingUtilities;
/ ** @see http://stackoverflow.com/questions/7298492 * /
public class PiRaster extends JPanel {
private static final int W = 30;
private static final int H = 30;
private static List< Integer> pi = new ArrayList< Integer>（）;
private final List< Integer> clut = new ArrayList< Integer>（）;
private BufferedImage image;
public PiRaster（）{
this.setPreferredSize（new Dimension（W * 16，H * 10））;
的String =
+31415926535897932384626433832795028841971693993751
+05820974944592307816406286208998628034825342117067
+98214808651328230664709384460955058223172535940812
+84811174502841027019385211055596446229489549303819
+64428810975665933446128475648233786783165271201909
+14564856692346034861045432664821339360726024914127;
for（int i = 0; i
}
for（int i = 0; i <10; i ++）{
clut.add（Color.getHSBColor（0.6f，i / 10f，1）.getRGB ;
}
image = new BufferedImage（W，H，BufferedImage.TYPE_INT_ARGB）;
int i = 0;
for（int row = 0; row
image.setRGB（col，row， clut.get（pi.get（i）））;
if（++ i == pi.size（））{
i = 0;
}
}
}
}
private static class ClutPanel extends JPanel {
private int i;
public ClutPanel（List< Integer> rgbList）{
this.setLayout（new GridLayout（1,0））;
for（Integer rgb：rgbList）{
JLabel label = new JLabel（String.valueOf（i ++），JLabel.CENTER）;
label.setOpaque（true）;
label.setBackground（new Color（rgb））;
this.add（label）;
}
}
}
@Override
public void paintComponent（Graphics g）{
super.paintComponent（g）;
g.drawImage（image，0，0，getWidth（），getHeight（），null）;
}
public static void main（String [] args）{
SwingUtilities.invokeLater（new Runnable（）{
@Override
public void run（）{
JFrame frame = new JFrame（）;
frame.setDefaultCloseOperation（JFrame.EXIT_ON_CLOSE）;
PiRaster pr = new PiRaster（）;
图标图标= new ImageIcon（pr.image）;
frame.add（new JLabel（icon），BorderLayout.WEST）;
frame.add（pr，BorderLayout.CENTER）;
frame.add （new ClutPanel（pr.clut），BorderLayout.SOUTH）;
frame.pack（）;
frame.setVisible（true）;
}
}）;
}
}
I have some Javascript code that acts on an pixel array defined like so:
screen = {'width':160, 'height':144, 'data':new Array(160*144*4)};
...
canvas.putImageData(GPU._scrn, 0,0);
Where screen is 1D array of width * height * 4 values representing the colors as detailed here: https://developer.mozilla.org/En/HTML/Canvas/Pixel_manipulation_with_canvas
Is there a convenience method to paint this array to the screen as is? If not, what's the easiest way to paint this array using Swing?
解决方案
BufferedImage is probably the most flexible choice. You can use it as an Icon or override paintComponent() for the full generality of Java2D.
package overflow;
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.GridLayout;
import java.awt.image.BufferedImage;
import java.util.ArrayList;
import java.util.List;
import javax.swing.Icon;
import javax.swing.ImageIcon;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.SwingUtilities;
/** @see http://stackoverflow.com/questions/7298492 */
public class PiRaster extends JPanel {
private static final int W = 30;
private static final int H = 30;
private static List<Integer> pi = new ArrayList<Integer>();
private final List<Integer> clut = new ArrayList<Integer>();
private BufferedImage image;
public PiRaster() {
this.setPreferredSize(new Dimension(W * 16, H * 10));
String s = ""
+ "31415926535897932384626433832795028841971693993751"
+ "05820974944592307816406286208998628034825342117067"
+ "98214808651328230664709384460955058223172535940812"
+ "84811174502841027019385211055596446229489549303819"
+ "64428810975665933446128475648233786783165271201909"
+ "14564856692346034861045432664821339360726024914127";
for (int i = 0; i < s.length(); i++) {
pi.add(s.charAt(i) - '0');
}
for (int i = 0; i < 10; i++) {
clut.add(Color.getHSBColor(0.6f, i / 10f, 1).getRGB());
}
image = new BufferedImage(W, H, BufferedImage.TYPE_INT_ARGB);
int i = 0;
for (int row = 0; row < H; row++) {
for (int col = 0; col < W; col++) {
image.setRGB(col, row, clut.get(pi.get(i)));
if (++i == pi.size()) {
i = 0;
}
}
}
}
private static class ClutPanel extends JPanel {
private int i;
public ClutPanel(List<Integer> rgbList) {
this.setLayout(new GridLayout(1, 0));
for (Integer rgb : rgbList) {
JLabel label = new JLabel(String.valueOf(i++), JLabel.CENTER);
label.setOpaque(true);
label.setBackground(new Color(rgb));
this.add(label);
}
}
}
@Override
public void paintComponent(Graphics g) {
super.paintComponent(g);
g.drawImage(image, 0, 0, getWidth(), getHeight(), null);
}
public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable() {
@Override
public void run() {
JFrame frame = new JFrame();
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
PiRaster pr = new PiRaster();
Icon icon = new ImageIcon(pr.image);
frame.add(new JLabel(icon), BorderLayout.WEST);
frame.add(pr, BorderLayout.CENTER);
frame.add(new ClutPanel(pr.clut), BorderLayout.SOUTH);
frame.pack();
frame.setVisible(true);
}
});
}
}
这篇关于Swing方法类似于HTML5的canvas.putImageData（arrayOfPixels，0,0）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IT屋！
查看全文
