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  help with images  (Read 1200 times)
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Offline SteveJohnson

Senior Newbie

Java games rock!

« Posted 2004-02-18 01:00:04 »


 I was hoping someone could help me with a problem I am having. I am using Art of Illusion ( to create models by using a plugin. Right now I am just using java serialization to output a mesh class to a file. For the texture i just get the data from the databuffer (a byte array) and store  it like that. here is the code I am using.

double[] params = o.object.getAverageParameterValues();
                        Image img = tex.createComponentImage(dblMinU,dblMaxU,dblMinV,dblMaxV,intWidth,intHeight,intComponent,dblTime,params);
                        BufferedImage bImage = new BufferedImage(img.getWidth(null),img.getHeight(null),BufferedImage.TYPE_4BYTE_ABGR);
                        BufferedImage newImage = flipImage(bImage);
                        byte[] d = ((DataBufferByte)newImage.getData().getDataBuffer()).getData();
                        byte[] newData = new byte[d.length];
                        for(int i = 0 , j = (d.length - 1);i < d.length;i++,j--)
                              newData[j] = d[i];

here is the flip image method
private BufferedImage flipImage(BufferedImage i)
            AffineTransform tx = java.awt.geom.AffineTransform.getScaleInstance(1, -1);
            tx.translate(0, -i.getHeight(null));
            AffineTransformOp op = new AffineTransformOp(tx, AffineTransformOp.TYPE_NEAREST_NEIGHBOR);
            i = op.filter(i, null);
            return i;

the flip image method is just taken from a nehe tutorial.  The problem I am having is that I can never seem to get the texture right. If i just use the flip image method and use the data straight from the flipped image the texture will appear orientated correctly but the colors will be messed up. When I reverse the byte array directly (after flipping the image) then the colors show up correctly but the orientation of the texture is wrong.  I am a little stuck as to what to do next. I am under the current assumption that after the flip image my pixels are in the correct order but the actual pixel data is getting messed up. Any pointers as to fixing this. I am assuming that each four bytes is a pixel and each byte of that will be a component (r,g,b,a). I already tried to write some code to reverse the order of each pixel but it was unsuccessfull.

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