/* RasterOp.java --
Copyright (C) 2000, 2002, 2004, 2005, 2006, Free Software Foundation
This file is part of GNU Classpath.
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package java.awt.image;
import java.awt.RenderingHints;
import java.awt.geom.Point2D;
import java.awt.geom.Rectangle2D;
/**
* An operation that is performed on one raster (the source) producing a new
* raster (the destination).
*/
public interface RasterOp
{
/**
* Performs an operation on the source raster, returning the result in a
* writable raster. If <code>dest</code> is <code>null</code>, a new
* <code>WritableRaster</code> will be created by calling the
* {@link #createCompatibleDestRaster(Raster)} method. If <code>dest</code>
* is not <code>null</code>, the result is written to <code>dest</code> then
* returned (this avoids creating a new <code>WritableRaster</code> each
* time this method is called).
*
* @param src the source raster.
* @param dest the destination raster (<code>null</code> permitted).
*
* @return The filtered raster.
*/
WritableRaster filter(Raster src, WritableRaster dest);
/**
* Returns the bounds of the destination raster on the basis of this
* <code>RasterOp</code> being applied to the specified source raster.
*
* @param src the source raster.
*
* @return The destination bounds.
*/
Rectangle2D getBounds2D(Raster src);
/**
* Returns a raster that can be used by this <code>RasterOp</code> as the
* destination raster when operating on the specified source raster.
*
* @param src the source raster.
*
* @return A new writable raster that can be used as the destination raster.
*/
WritableRaster createCompatibleDestRaster(Raster src);
/**
* Returns the point on the destination raster that corresponds to the given
* point on the source raster.
*
* @param srcPoint the source point.
* @param destPoint the destination point (<code>null</code> permitted).
*
* @return The destination point.
*/
Point2D getPoint2D(Point2D srcPoint, Point2D destPoint);
/**
* Returns the rendering hints for this operation.
*
* @return The rendering hints.
*/
RenderingHints getRenderingHints();
}