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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

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 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle in the LICENSE file that accompanied this code.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

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 *

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package java.awt.image;

import java.awt.geom.Rectangle2D;

import java.awt.geom.Point2D;

import java.awt.RenderingHints;

/**

 * This interface describes single-input/single-output

 * operations performed on Raster objects.  It is implemented by such

 * classes as AffineTransformOp, ConvolveOp, and LookupOp.  The Source

 * and Destination objects must contain the appropriate number

 * of bands for the particular classes implementing this interface.

 * Otherwise, an exception is thrown.  This interface cannot be used to

 * describe more sophisticated Ops such as ones that take multiple sources.

 * Each class implementing this interface will specify whether or not it

 * will allow an in-place filtering operation (i.e. source object equal

 * to the destination object).  Note that the restriction to single-input

 * operations means that the values of destination pixels prior to the

 * operation are not used as input to the filter operation.

 * @see AffineTransformOp

 * @see BandCombineOp

 * @see ColorConvertOp

 * @see ConvolveOp

 * @see LookupOp

 * @see RescaleOp

 */

public interface RasterOp {

    /**

     * Performs a single-input/single-output operation from a source Raster

     * to a destination Raster.  If the destination Raster is null, a

     * new Raster will be created.  The IllegalArgumentException may be thrown

     * if the source and/or destination Raster is incompatible with the types

     * of Rasters allowed by the class implementing this filter.

     * @param src the source <code>Raster</code>

     * @param dest the destination <code>WritableRaster</code>

     * @return a <code>WritableRaster</code> that represents the result of

     *         the filtering operation.

     */

    public WritableRaster filter(Raster src, WritableRaster dest);

    /**

     * Returns the bounding box of the filtered destination Raster.

     * The IllegalArgumentException may be thrown if the source Raster

     * is incompatible with the types of Rasters allowed

     * by the class implementing this filter.

     * @param src the source <code>Raster</code>

     * @return a <code>Rectangle2D</code> that is the bounding box of

     *         the <code>Raster</code> resulting from the filtering

     *         operation.

     */

    public Rectangle2D getBounds2D(Raster src);

    /**

     * Creates a zeroed destination Raster with the correct size and number of

     * bands.

     * The IllegalArgumentException may be thrown if the source Raster

     * is incompatible with the types of Rasters allowed

     * by the class implementing this filter.

     * @param src the source <code>Raster</code>

     * @return a <code>WritableRaster</code> that is compatible with

     *         <code>src</code>

     */

    public WritableRaster createCompatibleDestRaster(Raster src);

    /**

     * Returns the location of the destination point given a

     * point in the source Raster.  If dstPt is non-null, it

     * will be used to hold the return value.

     * @param srcPt the source <code>Point2D</code>

     * @param dstPt the destination <code>Point2D</code>

     * @return the location of the destination point.

     */

    public Point2D getPoint2D(Point2D srcPt, Point2D dstPt);

    /**

     * Returns the rendering hints for this RasterOp.  Returns

     * null if no hints have been set.

     * @return the <code>RenderingHints</code> object of this

     *         <code>RasterOp</code>.

     */

    public RenderingHints getRenderingHints();

}