java.awt.image

Class BandCombineOp

Implemented Interfaces:
RasterOp

public class BandCombineOp
extends Object
implements RasterOp

Filter Raster pixels by applying a matrix. BandCombineOp applies a matrix to each pixel to produce new pixel values. The width of the matrix must be the same or one more than the number of bands in the source Raster. If one more, the pixels in the source are assumed to contain an implicit 1.0 at the end. The rows of the matrix are multiplied by the pixel to produce the values for the destination. Therefore the destination Raster must contain the same number of bands as the number of rows in the filter matrix.

Constructor Summary

BandCombineOp(float[][] matrix, RenderingHints hints)
Construct a BandCombineOp.

Method Summary

WritableRaster
createCompatibleDestRaster(Raster src)
Creates a new WritableRaster that can be used as the destination for this Op.
WritableRaster
filter(Raster src, WritableRaster dest)
Filter Raster pixels through a matrix.
Rectangle2D
getBounds2D(Raster src)
float[][]
getMatrix()
Return the matrix for this Op.
Point2D
getPoint2D(Point2D src, Point2D dst)
Return corresponding destination point for source point.
RenderingHints
getRenderingHints()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

BandCombineOp

public BandCombineOp(float[][] matrix,
                     RenderingHints hints)
Construct a BandCombineOp.
Parameters:
matrix - The matrix to filter pixels with.
hints - Rendering hints to apply. Ignored.

Method Details

createCompatibleDestRaster

public WritableRaster createCompatibleDestRaster(Raster src)
Creates a new WritableRaster that can be used as the destination for this Op. This implementation creates a Banded Raster with data type FLOAT.
Specified by:
createCompatibleDestRaster in interface RasterOp

filter

public WritableRaster filter(Raster src,
                             WritableRaster dest)
Filter Raster pixels through a matrix. Applies the Op matrix to source pixes to produce dest pixels. Each row of the matrix is multiplied by the src pixel components to produce the dest pixel. If matrix is one more than the number of bands in the src, the last element is implicitly multiplied by 1, i.e. added to the sum for that dest component. If dest is null, a suitable Raster is created. This implementation uses createCompatibleDestRaster.
Specified by:
filter in interface RasterOp
Parameters:
src - The source Raster.
dest - The destination Raster, or null.

getBounds2D

public Rectangle2D getBounds2D(Raster src)
Specified by:
getBounds2D in interface RasterOp

getMatrix

public float[][] getMatrix()
Return the matrix for this Op.

getPoint2D

public Point2D getPoint2D(Point2D src,
                          Point2D dst)
Return corresponding destination point for source point. LookupOp will return the value of src unchanged.
Specified by:
getPoint2D in interface RasterOp
Parameters:
src - The source point.
dst - The destination point.

getRenderingHints

public RenderingHints getRenderingHints()
Specified by:
getRenderingHints in interface RasterOp

Copyright (C) 2004 Free Software Foundation This file is part of GNU Classpath. GNU Classpath is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2, or (at your option) any later version. GNU Classpath 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 for more details. You should have received a copy of the GNU General Public License along with GNU Classpath; see the file COPYING. If not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. Linking this library statically or dynamically with other modules is making a combined work based on this library. Thus, the terms and conditions of the GNU General Public License cover the whole combination. As a special exception, the copyright holders of this library give you permission to link this library with independent modules to produce an executable, regardless of the license terms of these independent modules, and to copy and distribute the resulting executable under terms of your choice, provided that you also meet, for each linked independent module, the terms and conditions of the license of that module. An independent module is a module which is not derived from or based on this library. If you modify this library, you may extend this exception to your version of the library, but you are not obligated to do so. If you do not wish to do so, delete this exception statement from your version.