Changing "Image Mode" ? (Composite)

[appel]

For those who know Photoshop, you can change the mode of the image; Normal, Dissolve, Darken, Multiply, Screen etc.

Is there a way to do this with in Java?

[Anon666]

That looks like modulate to me.

dstColor*=srcColor;

Ofcourse I'm wrong - that is nothing like a modulate =)

[appel]

That looks like modulate to me.

dstColor*=srcColor;

Could you summarize that any further?    ( )

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[oNyx]

In java2d there are those composite modes and over in opengl you have blend funcs (in this case it would be GL_ONE, GL_ONE).

[appel]

I'm doing something like this, and doesnt work:

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... AlphaComposite originalComposite = (AlphaComposite)g.getComposite(); g.setComposite(makeComposite(0.5F)); // 50% transparent g.drawImage(...); g.setComposite(originalComposite); .. private AlphaComposite makeComposite(float alpha) {    int type = AlphaComposite.SRC;    return(AlphaComposite.getInstance(type, alpha)); }

This is all very new to me...any help appreciated. What do I change to make it work as intended?

[Anon666]

Amazing what a quick google can find.

http://www.pegtop.net/delphi/blendmodes/

As to how to implement that in Java - implement the Composite interface, and define your own compositing rule. (you will in turn have to define a CompositeContext - with the necessary magic in the compose(Raster src, Raster dst, WritableRaster dstOut) method.

It won't be quick though (so don't use it in a real-time animation).

[appel]

Thank you