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Diffstat (limited to 'libjava/classpath/java/awt/image/BandCombineOp.java')
| -rw-r--r-- | libjava/classpath/java/awt/image/BandCombineOp.java | 218 |
1 files changed, 0 insertions, 218 deletions
diff --git a/libjava/classpath/java/awt/image/BandCombineOp.java b/libjava/classpath/java/awt/image/BandCombineOp.java deleted file mode 100644 index f3a6c57..0000000 --- a/libjava/classpath/java/awt/image/BandCombineOp.java +++ /dev/null @@ -1,218 +0,0 @@ -/* BandCombineOp.java - perform a combination on the bands of a raster - Copyright (C) 2004, 2006 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. */ - -package java.awt.image; - -import java.awt.RenderingHints; -import java.awt.geom.Point2D; -import java.awt.geom.Rectangle2D; -import java.util.Arrays; - -/** - * 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. - * - * This Op assumes that samples are integers; floating point sample types will - * be rounded to their nearest integer value during filtering. - * - * @author Jerry Quinn (jlquinn@optonline.net) - */ -public class BandCombineOp implements RasterOp -{ - private RenderingHints hints; - private float[][] matrix; - - /** - * Construct a BandCombineOp. - * - * @param matrix The matrix to filter pixels with. - * @param hints Rendering hints to apply. Ignored. - * @throws ArrayIndexOutOfBoundsException if the matrix is invalid - */ - public BandCombineOp(float[][] matrix, RenderingHints hints) - { - this.matrix = new float[matrix.length][]; - int width = matrix[0].length; - for (int i = 0; i < matrix.length; i++) - { - this.matrix[i] = new float[width + 1]; - for (int j = 0; j < width; j++) - this.matrix[i][j] = matrix[i][j]; - - // The reference implementation pads the array with a trailing zero... - this.matrix[i][width] = 0; - } - - this.hints = hints; - } - - /** - * 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. - * - * @param src The source Raster. - * @param dest The destination Raster, or null. - * @throws IllegalArgumentException if the destination raster is incompatible - * with the source raster. - * @return The filtered Raster. - * @see java.awt.image.RasterOp#filter(java.awt.image.Raster, - * java.awt.image.WritableRaster) - */ - public WritableRaster filter(Raster src, WritableRaster dest) { - if (dest == null) - dest = createCompatibleDestRaster(src); - else if (dest.getNumBands() != src.getNumBands() - || dest.getTransferType() != src.getTransferType()) - throw new IllegalArgumentException("Destination raster is incompatible with source raster"); - - // Filter the pixels - int[] spix = new int[matrix[0].length - 1]; - int[] spix2 = new int[matrix[0].length - 1]; - int[] dpix = new int[matrix.length]; - for (int y = src.getMinY(); y < src.getHeight() + src.getMinY(); y++) - for (int x = src.getMinX(); x < src.getWidth() + src.getMinX(); x++) - { - // In case matrix rows have implicit translation - spix[spix.length - 1] = 1; - src.getPixel(x, y, spix); - - // Do not re-calculate if pixel is identical to the last one - // (ie, blocks of the same colour) - if (!Arrays.equals(spix, spix2)) - { - System.arraycopy(spix, 0, spix2, 0, spix.length); - for (int i = 0; i < matrix.length; i++) - { - dpix[i] = 0; - for (int j = 0; j < matrix[0].length - 1; j++) - dpix[i] += spix[j] * (int)matrix[i][j]; - } - } - dest.setPixel(x, y, dpix); - } - - return dest; - } - - /* (non-Javadoc) - * @see java.awt.image.RasterOp#getBounds2D(java.awt.image.Raster) - */ - public final Rectangle2D getBounds2D(Raster src) - { - return src.getBounds(); - } - - /** - * Creates a new WritableRaster that can be used as the destination for this - * Op. The number of bands in the source raster must equal the number of rows - * in the op matrix, which must also be equal to either the number of columns - * or (columns - 1) in the matrix. - * - * @param src The source raster. - * @return A compatible raster. - * @see java.awt.image.RasterOp#createCompatibleDestRaster(java.awt.image.Raster) - * @throws IllegalArgumentException if the raster is incompatible with the - * matrix. - */ - public WritableRaster createCompatibleDestRaster(Raster src) - { - // Destination raster must have same number of bands as source - if (src.getNumBands() != matrix.length) - throw new IllegalArgumentException("Number of rows in matrix specifies an " - + "incompatible number of bands"); - - // We use -1 and -2 because we previously padded the rows with a trailing 0 - if (src.getNumBands() != matrix[0].length - 1 - && src.getNumBands() != matrix[0].length - 2) - throw new IllegalArgumentException("Incompatible number of bands: " - + "the number of bands in the raster must equal the number of " - + "columns in the matrix, optionally minus one"); - - return src.createCompatibleWritableRaster(); - } - - /** - * Return corresponding destination point for source point. Because this is - * not a geometric operation, it simply returns a copy of the source. - * - * @param src The source point. - * @param dst The destination point. - * @return dst The destination point. - * @see java.awt.image.RasterOp#getPoint2D(java.awt.geom.Point2D, - *java.awt.geom.Point2D) - */ - public final Point2D getPoint2D(Point2D src, Point2D dst) - { - if (dst == null) - return (Point2D)src.clone(); - - dst.setLocation(src); - return dst; - } - - /* (non-Javadoc) - * @see java.awt.image.RasterOp#getRenderingHints() - */ - public final RenderingHints getRenderingHints() - { - return hints; - } - - /** - * Return the matrix used in this operation. - * - * @return The matrix used in this operation. - */ - public final float[][] getMatrix() - { - return matrix; - } - -} |