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import java.awt.*;
import java.awt.image.*;
import java.io.*;
import javax.imageio.*;
import javax.swing.*;
/**
* This class is a wrap-up of the classic BufferedImage class. It provides simplified accessing method for RGB image.
* You may want to display this image by enclosing it into an ImageFrame object.
*
*
*/
public class ImageBuffer extends BufferedImage {
public ImageBuffer(int width, int height) {
super(width, height, BufferedImage.TYPE_INT_ARGB);
}
static public ImageBuffer loadFromDisk( String __filename)
{
ImageBuffer image = null;
try {
BufferedImage bi = ImageIO.read(new File(__filename));
image = new ImageBuffer(bi.getWidth(),bi.getHeight());
for ( int x = 0 ; x != bi.getWidth() ; x++ )
for ( int y = 0 ; y != bi.getHeight() ; y++ )
image.setRGB(x, y, bi.getRGB(x, y));
}
catch ( IOException e )
{
System.err.println("[error] image \""+__filename+"\" could not be loaded.");
}
return image;
}
/**
* save current image buffer to PNG file.
* @param __filename output filename without extension
*/
public void saveToDisk( String __filename )
{
try {
ImageIO.write(this, "png", new File(__filename + ".png"));
}
catch ( IOException e )
{
System.err.println("[error] image \""+__filename+"\" could not be written to disk.");
}
}
/**
* set target pixel color (RGB) -- color values btw 0 and 255
* @param x
* @param y
* @param rgb a 3-values array containing [red,green,blue] values
*/
public void setPixel( int x, int y , int rgb[] )
{
this.setPixel(x, y, rgb[0] , rgb[1] , rgb[2]);
}
/**
* set target pixel color (RGB) -- color values btw 0 and 255
* @param x
* @param y
* @param red
* @param green
* @param blue
*/
public void setPixel( int x, int y , int red, int green, int blue )
{
int colorValues;
colorValues = 0xFF000000; // alpha set non transparent
colorValues += red * 256*256; // red
colorValues += green * 256; // green
colorValues += blue ; // blue
this.setRGB(x, y, colorValues);
}
/**
* return target pixel color
* @param x
* @param y
* @return a 3-values array containing [red,green,blue] values -- color values btw 0 and 255
*/
public int[] getPixel( int x, int y )
{
int [] rgb = new int[3];
int rawvalue = this.getRGB(x, y);
rgb[0] = ( rawvalue & 0x00FF0000 ) / (int)Math.pow(256,2); // red
rgb[1] = ( rawvalue & 0x0000FF00 ) / 256; // green
rgb[2] = ( rawvalue & 0x000000FF ); // blue
return rgb;
}
// HSV methods (same as RGB but handles HSV values in and out) -- all values btw [0..1]
public double[] getPixelHSB( int x, int y )
{
int[] rgb = this.getPixel(x, y);
float[] hsvFloat = java.awt.Color.RGBtoHSB(rgb[0], rgb[1], rgb[2], null);
double[] hsv = new double[3];
for (int i = 0; i < hsv.length; i++)
hsv[i] = hsvFloat[i];
return hsv;
}
public void setPixelHSB( int x, int y , double[] hsb)
{
this.setPixelHSB(x, y, hsb[0], hsb[1], hsb[2]);
}
public void setPixelHSB( int x, int y , double h, double s, double b )
{
int rgb = java.awt.Color.HSBtoRGB((float)h,(float)s,(float)b);
this.setRGB(x, y, rgb);
}
/**
* fill screen with given color values (cls means "clear screen")
* @param r
* @param g
* @param b
*/
public void cls(int r, int g, int b)
{
for ( int x = 0 ; x != this.getWidth() ; x++ )
for ( int y = 0 ; y != this.getHeight() ; y++ )
this.setPixel(x,y,r,g,b);
}
public void writeText(String __text)
{
Graphics2D g = this.createGraphics();
g.setColor(Color.GREEN);
g.setFont(new Font("Lucida Sans Typewriter", Font.PLAIN, 36));
g.drawString("Hello, World!", 10, 50);
g.dispose();
}
public static void main(String[] args) throws IOException {
// build an ImageBuffer
ImageBuffer image = new ImageBuffer(16,16); // method 1 : call constructor
//ImageBuffer image = loadFromDisk("test"); // method 2 : image loading factory
// Set a pixel
int[] rgb = {255,0,0};
image.setPixel(0,0,rgb); // method 1a : wrap-up method from ImageBuffer
//image.setPixel(0,0,255,255,255,255); // method 1b : wrap-up method from ImageBuffer
//image.setRGB(0, 0, 0xFF00FF00); // method 2 : standard method from BufferedImage using only one integer value
// various specific wrap-up methods from ImageBuffer or general accessing method inherited from the BufferedImage object ...
int w = image.getWidth();
int h = image.getHeight();
for ( int j = 0 ; j != h ; j++ )
for ( int i = 0 ; i != w ; i++ )
image.setPixel(i, j, (int)((double)(i)/(double)w*255.),(int)((double)(j)/(double)h*255.),(int)((double)(j)/(double)h*255.));
System.out.println("number of bands : " + image.getRaster().getNumBands());
System.out.println("colors of origin pixel: " + image.getRGB(0, 0));
rgb = image.getPixel(0, 0);
System.out.println("colors of origin pixel (detailed) : ("+rgb[0]+","+rgb[1]+","+rgb[2]+")");
System.out.println("image size is ("+w+","+h+")");
// save to disk
image.saveToDisk("testdev");
System.out.println("file \"testdev.png\" created.");
// display image -- you may prefer using ImageFrame if you want to display an image.
Icon icon = new ImageIcon(image);
JLabel label = new JLabel(icon);
final JFrame f = new JFrame("Demo");
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
f.getContentPane().add(label);
f.pack();
SwingUtilities.invokeLater(new Runnable(){
public void run() {
f.setLocationRelativeTo(null);
f.setVisible(true);
}
});
}
} |
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