Slick Forums

--- ImageBuffer.java    2009-07-05 13:27:48.000000000 -0300
+++ ImageBuffer-fixed.java      2010-04-26 18:14:58.121064102 -0300
@@ -124,9 +124,9 @@
                        rawData[ofs + 2] = (byte) b;
                        rawData[ofs + 3] = (byte) a;
                } else {
-                       rawData[ofs] = (byte) r;
+                       rawData[ofs] = (byte) b;
                        rawData[ofs + 1] = (byte) g;
-                       rawData[ofs + 2] = (byte) b;
+                       rawData[ofs + 2] = (byte) r;
                        rawData[ofs + 3] = (byte) a;
                }
        }

       if (ByteOrder.nativeOrder() == ByteOrder.BIG_ENDIAN) {
          System.out.println("Big endian");
       } else if (ByteOrder.nativeOrder() == ByteOrder.LITTLE_ENDIAN) {
          System.out.println("Little endian");
       } else
          System.out.println("no idea");

package net.haaks.theycome;

import java.nio.ByteOrder;

import org.newdawn.slick.AppGameContainer;
import org.newdawn.slick.BasicGame;
import org.newdawn.slick.Color;
import org.newdawn.slick.GameContainer;
import org.newdawn.slick.Graphics;
import org.newdawn.slick.Image;
import org.newdawn.slick.ImageBuffer;
import org.newdawn.slick.SlickException;

public class ImageBufferEndianTest extends BasicGame {

   ImageBuffer redImageBuffer, blueImageBuffer;
   Image fromRed, fromBlue;
   String endian;
   
   public ImageBufferEndianTest() {
      super("ImageBuffer Endian Test");
   }

   public static void main(String[] args) {
      try {
         AppGameContainer container = new AppGameContainer(new ImageBufferEndianTest());
         container.setDisplayMode(800,600,false);
         container.start();
      } catch (SlickException e) {
         e.printStackTrace();
      }
   }

   @Override
   public void render(GameContainer container, Graphics g) throws SlickException {
      g.setColor(Color.white);
      g.drawString("Endianness is " + endian, 10, 100);
      
      g.drawString("Image below should be red", 10, 200);
      g.drawImage(fromRed, 10, 220);
      g.drawString("Image below should be blue", 410, 200);
      g.drawImage(fromBlue, 410, 220);
   }

   @Override
   public void init(GameContainer container) throws SlickException {
      // detect what endian we have
      if (ByteOrder.nativeOrder() == ByteOrder.BIG_ENDIAN) {
             endian = "Big endian";
          } else if (ByteOrder.nativeOrder() == ByteOrder.LITTLE_ENDIAN) {
             endian = "Little endian";
          } else
             endian = "no idea";
      
      redImageBuffer = new ImageBuffer(100,100);
      fillImageBufferWithColor(redImageBuffer, Color.red, 100, 100);
      
      blueImageBuffer = new ImageBuffer(100,100);
      fillImageBufferWithColor(blueImageBuffer, Color.blue, 100, 100);
      
      fromRed = redImageBuffer.getImage();
      fromBlue = blueImageBuffer.getImage();
   }
   
   private void fillImageBufferWithColor(ImageBuffer buffer, Color c, int width, int height) {
      for (int x = 0; x < width; x++) {
         for (int y = 0; y < height; y++) {
            buffer.setRGBA(x, y, c.getRed(), c.getGreen(), c.getBlue(), c.getAlpha());
         }
      }
   }

   @Override
   public void update(GameContainer container, int delta) throws SlickException {
      // nothing to do
   }

}