package cn.outofmemory.snippets.desktop;

 

import java.awt.Graphics2D;

import java.awt.GraphicsConfiguration;

import java.awt.GraphicsDevice;

import java.awt.GraphicsEnvironment;

import java.awt.Image;

import java.awt.Toolkit;

import java.awt.Transparency;

import java.awt.image.BufferedImage;

import java.awt.image.ImageObserver;

 

public class BufferedImagePixels {

 

  static boolean imageLoaded = false;

 

  public static void main(String[] args) {

 

      // The ImageObserver implementation to observe loading of the image

      ImageObserver myImageObserver = new ImageObserver() {

        public boolean imageUpdate(Image image, int flags, int x, int y, int width, int height) {

          if ((flags & ALLBITS) != 0) {

            imageLoaded = true;

            System.out.println("Image loading finished!");

            return false;

          }

          return true;

        }

      };

 

      // The image URL - change to where your image file is located!

      String imageURL = "image.png";

 

      /*

      Image sourceImage = Toolkit.getDefaultToolkit().getImage(imageURL);

      sourceImage.getWidth(myImageObserver);

 

      // We wait until the image is fully loaded

      while (!imageLoaded) {

          try {

              Thread.sleep(100);

          } catch (InterruptedException e) {

          }

      }

 

      // Create a buffered image from the source image with a format that's compatible with the screen

      GraphicsEnvironment graphicsEnvironment = GraphicsEnvironment.getLocalGraphicsEnvironment();

      GraphicsDevice graphicsDevice = graphicsEnvironment.getDefaultScreenDevice();

      GraphicsConfiguration graphicsConfiguration = graphicsDevice.getDefaultConfiguration();

 

      // If the source image has no alpha info use Transparency.OPAQUE instead

      BufferedImage image = graphicsConfiguration.createCompatibleImage(sourceImage.getWidth(null), sourceImage.getHeight(null), Transparency.BITMASK);

 

      // Copy image to buffered image

      Graphics2D graphics = image.createGraphics();

 

      // Paint the image onto the buffered image

      graphics.drawImage(sourceImage, 0, 0, null);

      graphics.dispose();

 

      int x = 10;

      int y = 10;

 

      // Get a pixel

      int rgb = image.getRGB(x, y);

 

      System.out.println("Pixel at [" + x + "," + y + "] RGB : " + rgb);

 

      // Get all the pixels

      int w = image.getWidth(null);

      int h = image.getHeight(null);

      int[] rgbs = new int[w*h];

      image.getRGB(0, 0, w, h, rgbs, 0, w);

 

      // Set a pixel

      rgb = 0xFF00FF00; // green

      image.setRGB(x, y, rgb);

 

  }