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| public class DemoImage {
public static final int WIDTH = 100;
public static final int OFFSET = 10;
private static final int IWIDTH = ((WIDTH/2)-OFFSET);
private static final int INB = IWIDTH*IWIDTH;
public static void main(String[] args) {
final int[][] array = create();
final BufferedImage[] images = {
createImage(array,convertToRGB(array), BufferedImage.TYPE_INT_RGB),
createImage(array,convertToARGB(array), BufferedImage.TYPE_INT_ARGB),
createImage(array,convertToGray(array), BufferedImage.TYPE_BYTE_GRAY)
};
final JPanel panel = new JPanel();
panel.setBackground(Color.YELLOW);
for(final BufferedImage image : images) {
panel.add(new JLabel(new ImageIcon(image)));
}
JOptionPane.showMessageDialog(null, panel);
}
private static BufferedImage createImage(final int[][] array, final int[] pixelArray, final int type) {
final BufferedImage image = new BufferedImage(array[0].length, array.length, type);
final WritableRaster raster = image.getRaster();
raster.setPixels(0, 0, array[0].length, array.length, pixelArray);
return image;
}
private static int[] convertToRGB(final int[][] array) {
final int[] pixelArray = new int[array.length*array[0].length*3];
for(int i=0; i<pixelArray.length; i+=3) {
final int r = array[(i/3)/array[0].length][(i/3)%array[0].length];
pixelArray[i] = r;
pixelArray[i+1] = r;
pixelArray[i+2] = r;
}
return pixelArray;
}
private static int[] convertToARGB(int[][] array) {
final int[] pixelArray = new int[array.length*array[0].length*4];
for(int i=0; i<pixelArray.length; i+=4) {
int x=(i/4)%array[0].length;
int y=(i/4)/array[0].length;
final int r = array[y][x];
pixelArray[i] = r;
pixelArray[i+1] = r;
pixelArray[i+2] = r;
pixelArray[i+3] = (x>=OFFSET&&x<WIDTH-OFFSET&&y>=OFFSET&&y<WIDTH-OFFSET)?255:0; // alpha
}
return pixelArray;
}
private static int[] convertToGray(int[][] array) {
final int[] pixelArray = new int[array.length*array[0].length];
for(int i=0; i<pixelArray.length; i++) {
final int r = array[i/array[0].length][i%array[0].length];
pixelArray[i] = r;
}
return pixelArray;
}
private static int[][] create() {
final int[][] array = new int[WIDTH][WIDTH];
for(int i = OFFSET, r=0; i< WIDTH/2; i++) {
for(int j = OFFSET; j< WIDTH/2; j++) {
array[i][j]=
array[j][i]=
array[99-i][j]=
array[99-j][i]=
array[i][99-j]=
array[j][99-i]=
array[99-i][99-j]=
array[99-j][99-i]=(int)(r*255.0/INB);
r++;
}
}
return array;
}
} |
Créer une image à partir d'un tableau (int[][]) de pixel
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