Re: BufferedImage Scaling

From:

"Rupert Woodman" <NoEmail@com>

Newsgroups:

comp.lang.java.programmer

Date:

Sun, 8 Apr 2007 13:35:58 +0100

Message-ID:

<4618e1cd$0$8743$ed2619ec@ptn-nntp-reader02.plus.net>

When would you use the AffineTransform class? I see that in this case it
can be done with the Graphics2D.drawImage() method, so why does the
AffineTransform class exist at all? I'm currently using the AffineTransform
class to rotate an image - is that also the wrong thing to do?

Many thanks
Rgds

Rupert

"Knute Johnson" <nospam@rabbitbrush.frazmtn.com> wrote in message
news:tVTRh.248502$ia7.58665@newsfe14.lga...

artem wrote:

Hello all,
i am trying to wright a simple program where i have an image in a
file. I load it in to a BufferedImage and scale it, and then i want to
be able to set the position from the source code.

it works like this. i have 2 BufferedImages i load an image in to them
in the constructor. in the paint method i want to scale img and save
the scaled img to offimg, and the set the position of offimg and draw
it.

here is the source:

BufferedImage img = null; // colored Square
BufferedImage offimg = null; // black Square

Test1Cont(){
try {
    img = ImageIO.read(new File("wSquare.bmp"));
    offimg = ImageIO.read(new File("bSquare.bmp"));
} catch (IOException e) {}
}

public void paint(Graphics g) {
        Graphics2D g2d = (Graphics2D) g;
        g2d.fillRect(0, 0, getWidth(), getHeight());
        AffineTransform tx = new AffineTransform();
        tx.scale(5, 5);

        offimg.createGraphics().drawImage(img, tx, null);
        g2d.drawImage(offimg,x,y,null); //set the size with x and y
}

thanks all

Do you want to save the offimg to a file? Or do you just want to draw it
at some scale? I suggest you do all of your scaling with the drawImage()
method.

--

Knute Johnson
email s/nospam/knute/