transform the components in each pixel according to the transform tables to Java Micro Edition Image. - Java 2D Graphics

Java examples for 2D Graphics:BufferedImage Pixel

  1. HOME
  2. Java
  3. 2D Graphics
  4. BufferedImage Pixel

Description

transform the components in each pixel according to the transform tables to Java Micro Edition Image.

Demo Code

/*/*from   w w  w  . j a  va  2  s .  co m*/
 * This file is a part of the TUBE42 imagelib, released under the LGPL license.
 *
 * Development page: https://github.com/tube42/imagelib
 * License:          http://www.gnu.org/copyleft/lesser.html
 */
import javax.microedition.lcdui.*;

public class Main{
    /**
     * transform the components in each pixel according to the 
     * transform tables.
     * 
     * If a table is null, the original value will be used
     */
    public static Image transformARGB(Image image, byte[] ta, byte[] tr,
            byte[] tg, byte[] tb) {
        // 1. get blended image:
        int w = image.getWidth();
        int h = image.getHeight();

        int[] buffer = new int[w * h];

        image.getRGB(buffer, 0, w, 0, 0, w, h);
        image = null; // not needed anymore

        int[] tmp = new int[256];
        // apply A, R, G and B tables when available

        if (ta != null) {
            for (int i = 0; i < 256; i++)
                tmp[i] = (((int) ta[i]) & 0xFF) << 24;

            for (int i = 0; i < buffer.length; i++)
                buffer[i] = (buffer[i] & 0x00FFFFFF)
                        | tmp[(buffer[i] >> 24) & 0xFF];
        }

        if (tr != null) {
            for (int i = 0; i < 256; i++)
                tmp[i] = (((int) tr[i]) & 0xFF) << 16;

            for (int i = 0; i < buffer.length; i++)
                buffer[i] = (buffer[i] & 0xFF00FFFF)
                        | tmp[(buffer[i] >> 16) & 0xFF];
        }

        if (tg != null) {
            for (int i = 0; i < 256; i++)
                tmp[i] = (((int) tg[i]) & 0xFF) << 8;

            for (int i = 0; i < buffer.length; i++)
                buffer[i] = (buffer[i] & 0xFFFF00FF)
                        | tmp[(buffer[i] >> 8) & 0xFF];
        }
        if (tb != null) {
            for (int i = 0; i < 256; i++)
                tmp[i] = (((int) tb[i]) & 0xFF) << 0;

            for (int i = 0; i < buffer.length; i++)
                buffer[i] = (buffer[i] & 0xFFFFFF00)
                        | tmp[(buffer[i] >> 0) & 0xFF];
        }

        return Image.createRGBImage(buffer, w, h, true);
    }
    public static Image transformARGB(Image image, int delta_alpha,
            int delta_red, int delta_green, int delta_blue) {
        // build transformation tables
        byte[] ta = new byte[256];
        byte[] tr = new byte[256];
        byte[] tg = new byte[256];
        byte[] tb = new byte[256];
        for (int i = 0; i < 256; i++) {
            ta[i] = (byte) Math.min(255, Math.max(0, i + delta_alpha));
            tr[i] = (byte) Math.min(255, Math.max(0, i + delta_red));
            tg[i] = (byte) Math.min(255, Math.max(0, i + delta_green));
            tb[i] = (byte) Math.min(255, Math.max(0, i + delta_blue));
        }
        // now, transform it according to the tables
        return transformARGB(image, ta, tr, tg, tb);
    }
}

Related Tutorials