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*
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* 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).
*
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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 {@code BufferedImage} objects.
* It is implemented by {@code AffineTransformOp},
* {@code ConvolveOp}, {@code ColorConvertOp}, {@code RescaleOp},
* and {@code LookupOp}. These objects can be passed into
* a {@code BufferedImageFilter} to operate on a
* {@code BufferedImage} in the
* ImageProducer-ImageFilter-ImageConsumer paradigm.
* <p>
* Classes that implement this
* interface must specify whether or not they allow in-place filtering--
* filter operations where the source object is equal to the destination
* object.
* <p>
* This interface cannot be used to describe more sophisticated operations
* such as those that take multiple sources. Note that this restriction also
* means that the values of the destination pixels prior to the operation are
* not used as input to the filter operation.
* @see BufferedImage
* @see BufferedImageFilter
* @see AffineTransformOp
* @see BandCombineOp
* @see ColorConvertOp
* @see ConvolveOp
* @see LookupOp
* @see RescaleOp
*/
public interface BufferedImageOp {
/**
* Performs a single-input/single-output operation on a
* {@code BufferedImage}.
* If the color models for the two images do not match, a color
* conversion into the destination color model is performed.
* If the destination image is null,
* a {@code BufferedImage} with an appropriate {@code ColorModel}
* is created.
* <p>
* An {@code IllegalArgumentException} may be thrown if the source
* and/or destination image is incompatible with the types of images $
* allowed by the class implementing this filter.
*
* @param src The {@code BufferedImage} to be filtered
* @param dest The {@code BufferedImage} in which to store the results$
*
* @return The filtered {@code BufferedImage}.
*
* @throws IllegalArgumentException If the source and/or destination
* image is not compatible with the types of images allowed by the class
* implementing this filter.
*/
public BufferedImage filter(BufferedImage src, BufferedImage dest);
/**
* Returns the bounding box of the filtered destination image.
* An {@code IllegalArgumentException} may be thrown if the source
* image is incompatible with the types of images allowed
* by the class implementing this filter.
*
* @param src The {@code BufferedImage} to be filtered
*
* @return The {@code Rectangle2D} representing the destination
* image's bounding box.
*/
public Rectangle2D getBounds2D (BufferedImage src);
/**
* Creates a zeroed destination image with the correct size and number of
* bands.
* An {@code IllegalArgumentException} may be thrown if the source
* image is incompatible with the types of images allowed
* by the class implementing this filter.
*
* @param src The {@code BufferedImage} to be filtered
* @param destCM {@code ColorModel} of the destination. If null,
* the {@code ColorModel} of the source is used.
*
* @return The zeroed destination image.
*/
public BufferedImage createCompatibleDestImage (BufferedImage src,
ColorModel destCM);
/**
* Returns the location of the corresponding destination point given a
* point in the source image. If {@code dstPt} is specified, it
* is used to hold the return value.
* @param srcPt the {@code Point2D} that represents the point in
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