Hello,
Are you trying to blend the images in a Swing window, for example?
Either way, AlphaComposite is your friend. The basic approach looks
like this:
float alpha = 0f;
public void paintComponent(Graphics g) {
Graphics2D g2 = (Graphics2D)g;
Composite oldcomp = g2.getComposite();
// draw first image fully opaque
g2.drawImage(img1, 0, 0, null);
// change opacity of second image after each call to repaint()
g2.setComposite(AlphaComposite.getInstance(SRC_OVER, alpha));
g2.drawImage(img2, 0, 0, null);
g2.setComposite(oldcomp);
}
while (!done) {
alpha += 0.1;
repaint();
...
}
Chris
On Nov 29, 2006, at 3:54 AM, [EMAIL PROTECTED] wrote:
Hi all,
I've searched the web for 3 hours now, without a result. Is there a
simple and PERFORMANT way to blend two images (BufferedImages) in/
over each other? I want to build up an alphablending-animation,
which smoothly blends the old image out (alpha from 255 to 0) while
the new is blended in (alpha from 0 to 255) ...
i found several alphablending algorithms but nowhere a simple
example in java.
1. my first idea is to create dynamically a kind of result image.
each pixel (color) of the result image is calculated via a simple
equation. the problem is: i need the color palette as byte array ...
2. another idea is to render both images separately with an
AlphaComposite. then the 2 resulting images have to be merged into
one result images (addition).
could anybody help me with a link or an example in java? are any
other solutions for this common problem?
thanks a lot.
K4simir
[Message sent by forum member 'k4simir' (k4simir)]
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