mirror of git://gcc.gnu.org/git/gcc.git
974 lines
30 KiB
Java
974 lines
30 KiB
Java
/* Copyright (C) 2000, 2002, 2003, 2006, Free Software Foundation
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This file is part of GNU Classpath.
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GNU Classpath is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU Classpath is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Classpath; see the file COPYING. If not, write to the
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Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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02110-1301 USA.
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Linking this library statically or dynamically with other modules is
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making a combined work based on this library. Thus, the terms and
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conditions of the GNU General Public License cover the whole
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combination.
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As a special exception, the copyright holders of this library give you
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permission to link this library with independent modules to produce an
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executable, regardless of the license terms of these independent
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modules, and to copy and distribute the resulting executable under
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terms of your choice, provided that you also meet, for each linked
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independent module, the terms and conditions of the license of that
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module. An independent module is a module which is not derived from
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or based on this library. If you modify this library, you may extend
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this exception to your version of the library, but you are not
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obligated to do so. If you do not wish to do so, delete this
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exception statement from your version. */
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package java.awt.image;
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import gnu.java.lang.CPStringBuilder;
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import java.awt.Point;
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import java.awt.Rectangle;
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/**
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* A rectangular collection of pixels composed from a {@link DataBuffer} which
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* stores the pixel values, and a {@link SampleModel} which is used to retrieve
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* the pixel values.
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*
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* @author Rolf W. Rasmussen (rolfwr@ii.uib.no)
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*/
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public class Raster
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{
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/** The sample model used to access the pixel values. */
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protected SampleModel sampleModel;
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/** The data buffer used to store the pixel values. */
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protected DataBuffer dataBuffer;
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/** The x-coordinate of the top left corner of the raster. */
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protected int minX;
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/** The y-coordinate of the top left corner of the raster. */
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protected int minY;
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/** The width of the raster. */
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protected int width;
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/** The height of the raster. */
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protected int height;
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protected int sampleModelTranslateX;
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protected int sampleModelTranslateY;
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/** The number of bands. */
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protected int numBands;
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protected int numDataElements;
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/** The raster's parent. */
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protected Raster parent;
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/**
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* Creates a new raster.
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*
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* @param sampleModel the sample model.
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* @param origin the origin.
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*/
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protected Raster(SampleModel sampleModel, Point origin)
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{
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this(sampleModel, sampleModel.createDataBuffer(), origin);
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}
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/**
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* Creates a new raster.
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*
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* @param sampleModel the sample model.
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* @param dataBuffer the data buffer.
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* @param origin the origin.
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*/
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protected Raster(SampleModel sampleModel, DataBuffer dataBuffer,
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Point origin)
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{
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this(sampleModel, dataBuffer, new Rectangle(origin.x, origin.y,
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sampleModel.getWidth(), sampleModel.getHeight()), origin, null);
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}
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/**
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* Creates a new raster.
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*
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* @param sampleModel the sample model.
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* @param dataBuffer the data buffer.
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* @param aRegion the raster's bounds.
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* @param sampleModelTranslate the translation (<code>null</code> permitted).
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* @param parent the raster's parent.
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*/
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protected Raster(SampleModel sampleModel, DataBuffer dataBuffer,
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Rectangle aRegion, Point sampleModelTranslate, Raster parent)
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{
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this.sampleModel = sampleModel;
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this.dataBuffer = dataBuffer;
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this.minX = aRegion.x;
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this.minY = aRegion.y;
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this.width = aRegion.width;
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this.height = aRegion.height;
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// If sampleModelTranslate is null, use (0,0). Methods such as
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// Raster.createRaster are specified to allow for a null argument.
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if (sampleModelTranslate != null)
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{
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this.sampleModelTranslateX = sampleModelTranslate.x;
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this.sampleModelTranslateY = sampleModelTranslate.y;
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}
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this.numBands = sampleModel.getNumBands();
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this.numDataElements = sampleModel.getNumDataElements();
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this.parent = parent;
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}
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/**
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* Creates an interleaved raster using the specified data type.
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*
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* @param dataType the data type.
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* @param w the width.
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* @param h the height.
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* @param bands the number of bands.
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* @param location
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*
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* @return The new raster.
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*/
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public static WritableRaster createInterleavedRaster(int dataType,
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int w, int h, int bands, Point location)
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{
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int[] bandOffsets = new int[bands];
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// TODO: Maybe not generate this every time.
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for (int b = 0; b < bands; b++)
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bandOffsets[b] = b;
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int scanlineStride = bands * w;
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return createInterleavedRaster(dataType, w, h, scanlineStride, bands,
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bandOffsets, location);
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}
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/**
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* Creates an interleaved raster.
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*
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* @param dataType the data type.
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* @param w the width.
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* @param h the height.
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* @param scanlineStride the number of data elements from a sample on one
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* row to the corresponding sample on the next row.
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* @param pixelStride the number of elements from a sample in one pixel to
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* the corresponding sample in the next pixel.
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* @param bandOffsets the band offsets.
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* @param location
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*
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* @return The new raster.
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*/
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public static WritableRaster createInterleavedRaster(int dataType,
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int w, int h, int scanlineStride, int pixelStride, int[] bandOffsets,
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Point location)
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{
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SampleModel sm = new ComponentSampleModel(dataType, w, h, pixelStride,
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scanlineStride, bandOffsets);
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return createWritableRaster(sm, location);
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}
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/**
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* Creates a new banded raster.
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*
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* @param dataType the data type.
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* @param w the width.
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* @param h the height.
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* @param bands the number of bands.
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* @param location
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*
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* @return The new raster.
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*/
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public static WritableRaster createBandedRaster(int dataType, int w, int h,
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int bands, Point location)
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{
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SampleModel sm = new BandedSampleModel(dataType, w, h, bands);
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return createWritableRaster(sm, location);
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}
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/**
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* Creates a new banded raster.
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*
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* @param dataType the data type.
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* @param w the width.
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* @param h the height.
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* @param scanlineStride the number of data elements from a sample on one
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* row to the corresponding sample on the next row.
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* @param bankIndices the index for each bank.
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* @param bandOffsets the offset for each band.
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* @param location
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*
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* @return The new raster.
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*/
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public static WritableRaster createBandedRaster(int dataType, int w, int h,
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int scanlineStride, int[] bankIndices, int[] bandOffsets, Point location)
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{
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SampleModel sm = new BandedSampleModel(dataType, w, h, scanlineStride,
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bankIndices, bandOffsets);
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return createWritableRaster(sm, location);
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}
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/**
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* Creates a new packed raster.
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*
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* @param dataType the data type.
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* @param w the width.
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* @param h the height.
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* @param bandMasks the bit mask for each band.
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* @param location
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*
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* @return The new raster.
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*/
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public static WritableRaster createPackedRaster(int dataType, int w, int h,
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int[] bandMasks, Point location)
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{
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SampleModel sm = new SinglePixelPackedSampleModel(dataType, w, h,
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bandMasks);
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return createWritableRaster(sm, location);
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}
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/**
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* Creates a new raster.
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*
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* @param dataType the data type.
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* @param w the width.
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* @param h the height.
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* @param bands the number of bands.
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* @param bitsPerBand the number of bits per band.
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* @param location
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*
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* @return The new raster.
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*/
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public static WritableRaster createPackedRaster(int dataType,
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int w, int h, int bands, int bitsPerBand, Point location)
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{
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if (bands <= 0 || (bands * bitsPerBand > getTypeBits(dataType)))
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throw new IllegalArgumentException();
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SampleModel sm;
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if (bands == 1)
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sm = new MultiPixelPackedSampleModel(dataType, w, h, bitsPerBand);
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else
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{
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int[] bandMasks = new int[bands];
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int mask = 0x1;
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for (int bits = bitsPerBand; --bits != 0;)
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mask = (mask << 1) | 0x1;
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for (int i = 0; i < bands; i++)
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{
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bandMasks[i] = mask;
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mask <<= bitsPerBand;
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}
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sm = new SinglePixelPackedSampleModel(dataType, w, h, bandMasks);
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}
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return createWritableRaster(sm, location);
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}
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/**
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* Creates a new interleaved raster.
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*
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* @param dataBuffer the data buffer.
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* @param w the width.
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* @param h the height.
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* @param scanlineStride the number of data elements from a sample on one
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* row to the corresponding sample on the next row.
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* @param pixelStride the number of elements from a sample in one pixel to
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* the corresponding sample in the next pixel.
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* @param bandOffsets the offset for each band.
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* @param location
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*
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* @return The new raster.
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*/
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public static WritableRaster createInterleavedRaster(DataBuffer dataBuffer,
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int w, int h, int scanlineStride, int pixelStride, int[] bandOffsets,
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Point location)
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{
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SampleModel sm = new ComponentSampleModel(dataBuffer.getDataType(),
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w, h, pixelStride, scanlineStride, bandOffsets);
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return createWritableRaster(sm, dataBuffer, location);
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}
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/**
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* Creates a new banded raster.
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*
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* @param dataBuffer the data buffer.
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* @param w the width.
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* @param h the height.
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* @param scanlineStride the number of data elements from a sample on one
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* row to the corresponding sample on the next row.
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* @param bankIndices the index for each bank.
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* @param bandOffsets the band offsets.
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* @param location
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*
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* @return The new raster.
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*/
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public static WritableRaster createBandedRaster(DataBuffer dataBuffer,
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int w, int h, int scanlineStride, int[] bankIndices, int[] bandOffsets,
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Point location)
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{
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SampleModel sm = new BandedSampleModel(dataBuffer.getDataType(),
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w, h, scanlineStride, bankIndices, bandOffsets);
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return createWritableRaster(sm, dataBuffer, location);
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}
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/**
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* Creates a new packed raster.
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*
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* @param dataBuffer the data buffer.
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* @param w the width.
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* @param h the height.
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* @param scanlineStride the number of data elements from a sample on one
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* row to the corresponding sample on the next row.
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* @param bandMasks the bit mask for each band.
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* @param location
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*
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* @return The new raster.
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*/
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public static WritableRaster createPackedRaster(DataBuffer dataBuffer,
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int w, int h, int scanlineStride, int[] bandMasks, Point location)
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{
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SampleModel sm = new SinglePixelPackedSampleModel(dataBuffer.getDataType(),
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w, h, scanlineStride, bandMasks);
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return createWritableRaster(sm, dataBuffer, location);
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}
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/**
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* Creates a new packed raster.
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*
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* @param dataBuffer the data buffer.
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* @param w the width.
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* @param h the height.
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* @param bitsPerPixel the number of bits per pixel.
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* @param location
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*
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* @return The new raster.
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*/
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public static WritableRaster createPackedRaster(DataBuffer dataBuffer,
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int w, int h, int bitsPerPixel, Point location)
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{
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SampleModel sm = new MultiPixelPackedSampleModel(dataBuffer.getDataType(),
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w, h, bitsPerPixel);
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return createWritableRaster(sm, dataBuffer, location);
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}
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/**
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* Creates a new raster.
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*
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* @param sm the sample model.
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* @param db the data buffer.
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* @param location
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*
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* @return The new raster.
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*/
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public static Raster createRaster(SampleModel sm, DataBuffer db,
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Point location)
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{
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return new Raster(sm, db, location);
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}
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/**
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* Creates a new writable raster.
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*
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* @param sm the sample model.
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* @param location
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*
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* @return The new writable raster.
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*/
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public static WritableRaster createWritableRaster(SampleModel sm,
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Point location)
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{
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return new WritableRaster(sm, location);
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}
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/**
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* Creates a new writable raster.
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*
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* @param sm the sample model.
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* @param db the data buffer.
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* @param location
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*
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* @return The new writable raster.
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*/
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public static WritableRaster createWritableRaster(SampleModel sm,
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DataBuffer db, Point location)
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{
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return new WritableRaster(sm, db, location);
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}
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/**
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* Returns the raster's parent.
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*
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* @return The raster's parent.
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*/
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public Raster getParent()
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{
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return parent;
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}
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/**
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* Returns the x-translation.
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*
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* @return The x-translation.
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*/
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public final int getSampleModelTranslateX()
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{
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return sampleModelTranslateX;
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}
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/**
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* Returns the y-translation.
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*
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* @return The y-translation.
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*/
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public final int getSampleModelTranslateY()
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{
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return sampleModelTranslateY;
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}
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/**
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* Creates a new writable raster that is compatible with this raster.
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*
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* @return A new writable raster.
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*/
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public WritableRaster createCompatibleWritableRaster()
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{
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return new WritableRaster(getSampleModel(), new Point(minX, minY));
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}
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/**
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* Creates a new writable raster that is compatible with this raster.
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*
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* @param w the width.
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* @param h the height.
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*
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* @return A new writable raster.
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*/
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public WritableRaster createCompatibleWritableRaster(int w, int h)
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{
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return createCompatibleWritableRaster(minX, minY, w, h);
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}
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/**
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* Creates a new writable raster that is compatible with this raster, with
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* the specified bounds.
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*
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* @param rect the raster bounds.
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*
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* @return A new writable raster.
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*/
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public WritableRaster createCompatibleWritableRaster(Rectangle rect)
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{
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return createCompatibleWritableRaster(rect.x, rect.y,
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rect.width, rect.height);
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}
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/**
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* Creates a new writable raster that is compatible with this raster, with
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* the specified bounds.
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*
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* @param x the x-coordinate of the top-left corner of the raster.
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* @param y the y-coordinate of the top-left corner of the raster.
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* @param w the raster width.
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* @param h the raster height.
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*
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* @return A new writable raster.
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*/
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public WritableRaster createCompatibleWritableRaster(int x, int y,
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int w, int h)
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{
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SampleModel sm = getSampleModel().createCompatibleSampleModel(w, h);
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return new WritableRaster(sm, sm.createDataBuffer(), new Point(x, y));
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}
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public Raster createTranslatedChild(int childMinX, int childMinY) {
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int tcx = sampleModelTranslateX - minX + childMinX;
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int tcy = sampleModelTranslateY - minY + childMinY;
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return new Raster(sampleModel, dataBuffer,
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new Rectangle(childMinX, childMinY, width, height),
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new Point(tcx, tcy), this);
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}
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public Raster createChild(int parentX, int parentY, int width,
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int height, int childMinX, int childMinY,
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int[] bandList)
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{
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if (parentX < minX || parentX + width > minX + this.width
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|| parentY < minY || parentY + height > minY + this.height)
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throw new RasterFormatException("Child raster extends beyond parent");
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SampleModel sm = (bandList == null) ?
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sampleModel :
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sampleModel.createSubsetSampleModel(bandList);
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/*
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data origin
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/
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+-------------------------
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|\. __ parent trans
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| \`.
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| \ `. parent origin
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| \ `. /
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| /\ +-------- - -
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|trans\ /<\-- deltaTrans
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|child +-+-\---- - -
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| /|`| \__ parent [x, y]
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|child | |`. \
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|origin| : `.\
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| | / `\
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| : / +
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| child [x, y]
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parent_xy - parent_trans = child_xy - child_trans
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child_trans = parent_trans + child_xy - parent_xy
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*/
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return new Raster(sm, dataBuffer,
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new Rectangle(childMinX, childMinY, width, height),
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new Point(sampleModelTranslateX + childMinX - parentX,
|
|
sampleModelTranslateY + childMinY - parentY),
|
|
this);
|
|
}
|
|
|
|
/**
|
|
* Returns a new rectangle containing the bounds of this raster.
|
|
*
|
|
* @return A new rectangle containing the bounds of this raster.
|
|
*/
|
|
public Rectangle getBounds()
|
|
{
|
|
return new Rectangle(minX, minY, width, height);
|
|
}
|
|
|
|
/**
|
|
* Returns the x-coordinate of the top left corner of the raster.
|
|
*
|
|
* @return The x-coordinate of the top left corner of the raster.
|
|
*/
|
|
public final int getMinX()
|
|
{
|
|
return minX;
|
|
}
|
|
|
|
/**
|
|
* Returns the t-coordinate of the top left corner of the raster.
|
|
*
|
|
* @return The t-coordinate of the top left corner of the raster.
|
|
*/
|
|
public final int getMinY()
|
|
{
|
|
return minY;
|
|
}
|
|
|
|
/**
|
|
* Returns the width of the raster.
|
|
*
|
|
* @return The width of the raster.
|
|
*/
|
|
public final int getWidth()
|
|
{
|
|
return width;
|
|
}
|
|
|
|
/**
|
|
* Returns the height of the raster.
|
|
*
|
|
* @return The height of the raster.
|
|
*/
|
|
public final int getHeight()
|
|
{
|
|
return height;
|
|
}
|
|
|
|
/**
|
|
* Returns the number of bands for this raster.
|
|
*
|
|
* @return The number of bands.
|
|
*/
|
|
public final int getNumBands()
|
|
{
|
|
return numBands;
|
|
}
|
|
|
|
public final int getNumDataElements()
|
|
{
|
|
return numDataElements;
|
|
}
|
|
|
|
/**
|
|
* Returns the transfer type for the raster (this is determined by the
|
|
* raster's sample model).
|
|
*
|
|
* @return The transfer type.
|
|
*/
|
|
public final int getTransferType()
|
|
{
|
|
return sampleModel.getTransferType();
|
|
}
|
|
|
|
/**
|
|
* Returns the data buffer that stores the pixel data for this raster.
|
|
*
|
|
* @return The data buffer.
|
|
*/
|
|
public DataBuffer getDataBuffer()
|
|
{
|
|
return dataBuffer;
|
|
}
|
|
|
|
/**
|
|
* Returns the sample model that accesses the data buffer (to extract pixel
|
|
* data) for this raster.
|
|
*
|
|
* @return The sample model.
|
|
*/
|
|
public SampleModel getSampleModel()
|
|
{
|
|
return sampleModel;
|
|
}
|
|
|
|
public Object getDataElements(int x, int y, Object outData)
|
|
{
|
|
return sampleModel.getDataElements(x - sampleModelTranslateX,
|
|
y - sampleModelTranslateY, outData, dataBuffer);
|
|
}
|
|
|
|
public Object getDataElements(int x, int y, int w, int h, Object outData)
|
|
{
|
|
return sampleModel.getDataElements(x - sampleModelTranslateX,
|
|
y - sampleModelTranslateY, w, h, outData, dataBuffer);
|
|
}
|
|
|
|
/**
|
|
* Returns an array containing the samples for the pixel at (x, y) in the
|
|
* raster. If <code>iArray</code> is not <code>null</code>, it will be
|
|
* populated with the sample values and returned as the result of
|
|
* this function (this avoids allocating a new array instance).
|
|
*
|
|
* @param x the x-coordinate of the pixel.
|
|
* @param y the y-coordinate of the pixel.
|
|
* @param iArray an array to populate with the sample values and return as
|
|
* the result (if <code>null</code>, a new array will be allocated).
|
|
*
|
|
* @return The pixel sample values.
|
|
*/
|
|
public int[] getPixel(int x, int y, int[] iArray)
|
|
{
|
|
return sampleModel.getPixel(x - sampleModelTranslateX,
|
|
y - sampleModelTranslateY, iArray, dataBuffer);
|
|
}
|
|
|
|
/**
|
|
* Returns an array containing the samples for the pixel at (x, y) in the
|
|
* raster. If <code>fArray</code> is not <code>null</code>, it will be
|
|
* populated with the sample values and returned as the result of
|
|
* this function (this avoids allocating a new array instance).
|
|
*
|
|
* @param x the x-coordinate of the pixel.
|
|
* @param y the y-coordinate of the pixel.
|
|
* @param fArray an array to populate with the sample values and return as
|
|
* the result (if <code>null</code>, a new array will be allocated).
|
|
*
|
|
* @return The pixel sample values.
|
|
*/
|
|
public float[] getPixel(int x, int y, float[] fArray)
|
|
{
|
|
return sampleModel.getPixel(x - sampleModelTranslateX,
|
|
y - sampleModelTranslateY, fArray, dataBuffer);
|
|
}
|
|
|
|
/**
|
|
* Returns an array containing the samples for the pixel at (x, y) in the
|
|
* raster. If <code>dArray</code> is not <code>null</code>, it will be
|
|
* populated with the sample values and returned as the result of
|
|
* this function (this avoids allocating a new array instance).
|
|
*
|
|
* @param x the x-coordinate of the pixel.
|
|
* @param y the y-coordinate of the pixel.
|
|
* @param dArray an array to populate with the sample values and return as
|
|
* the result (if <code>null</code>, a new array will be allocated).
|
|
*
|
|
* @return The pixel sample values.
|
|
*/
|
|
public double[] getPixel(int x, int y, double[] dArray)
|
|
{
|
|
return sampleModel.getPixel(x - sampleModelTranslateX,
|
|
y - sampleModelTranslateY, dArray, dataBuffer);
|
|
}
|
|
|
|
/**
|
|
* Returns an array containing the samples for the pixels in the region
|
|
* specified by (x, y, w, h) in the raster. The array is ordered by pixels
|
|
* (that is, all the samples for the first pixel are grouped together,
|
|
* followed by all the samples for the second pixel, and so on).
|
|
* If <code>iArray</code> is not <code>null</code>, it will be populated
|
|
* with the sample values and returned as the result of this function (this
|
|
* avoids allocating a new array instance).
|
|
*
|
|
* @param x the x-coordinate of the top-left pixel.
|
|
* @param y the y-coordinate of the top-left pixel.
|
|
* @param w the width of the region of pixels.
|
|
* @param h the height of the region of pixels.
|
|
* @param iArray an array to populate with the sample values and return as
|
|
* the result (if <code>null</code>, a new array will be allocated).
|
|
*
|
|
* @return The pixel sample values.
|
|
*/
|
|
public int[] getPixels(int x, int y, int w, int h, int[] iArray)
|
|
{
|
|
return sampleModel.getPixels(x - sampleModelTranslateX,
|
|
y - sampleModelTranslateY, w, h, iArray, dataBuffer);
|
|
}
|
|
|
|
/**
|
|
* Returns an array containing the samples for the pixels in the region
|
|
* specified by (x, y, w, h) in the raster. The array is ordered by pixels
|
|
* (that is, all the samples for the first pixel are grouped together,
|
|
* followed by all the samples for the second pixel, and so on).
|
|
* If <code>fArray</code> is not <code>null</code>, it will be populated
|
|
* with the sample values and returned as the result of this function (this
|
|
* avoids allocating a new array instance).
|
|
*
|
|
* @param x the x-coordinate of the top-left pixel.
|
|
* @param y the y-coordinate of the top-left pixel.
|
|
* @param w the width of the region of pixels.
|
|
* @param h the height of the region of pixels.
|
|
* @param fArray an array to populate with the sample values and return as
|
|
* the result (if <code>null</code>, a new array will be allocated).
|
|
*
|
|
* @return The pixel sample values.
|
|
*/
|
|
public float[] getPixels(int x, int y, int w, int h, float[] fArray)
|
|
{
|
|
return sampleModel.getPixels(x - sampleModelTranslateX,
|
|
y - sampleModelTranslateY, w, h, fArray, dataBuffer);
|
|
}
|
|
|
|
/**
|
|
* Returns an array containing the samples for the pixels in the region
|
|
* specified by (x, y, w, h) in the raster. The array is ordered by pixels
|
|
* (that is, all the samples for the first pixel are grouped together,
|
|
* followed by all the samples for the second pixel, and so on).
|
|
* If <code>dArray</code> is not <code>null</code>, it will be populated
|
|
* with the sample values and returned as the result of this function (this
|
|
* avoids allocating a new array instance).
|
|
*
|
|
* @param x the x-coordinate of the top-left pixel.
|
|
* @param y the y-coordinate of the top-left pixel.
|
|
* @param w the width of the region of pixels.
|
|
* @param h the height of the region of pixels.
|
|
* @param dArray an array to populate with the sample values and return as
|
|
* the result (if <code>null</code>, a new array will be allocated).
|
|
*
|
|
* @return The pixel sample values.
|
|
*/
|
|
public double[] getPixels(int x, int y, int w, int h, double[] dArray)
|
|
{
|
|
return sampleModel.getPixels(x - sampleModelTranslateX,
|
|
y - sampleModelTranslateY, w, h, dArray, dataBuffer);
|
|
}
|
|
|
|
/**
|
|
* Returns the sample value for the pixel at (x, y) in the raster.
|
|
*
|
|
* @param x the x-coordinate of the pixel.
|
|
* @param y the y-coordinate of the pixel.
|
|
* @param b the band (in the range <code>0</code> to
|
|
* <code>getNumBands() - 1</code>).
|
|
*
|
|
* @return The sample value.
|
|
*/
|
|
public int getSample(int x, int y, int b)
|
|
{
|
|
return sampleModel.getSample(x - sampleModelTranslateX,
|
|
y - sampleModelTranslateY, b, dataBuffer);
|
|
}
|
|
|
|
/**
|
|
* Returns the sample value for the pixel at (x, y) in the raster.
|
|
*
|
|
* @param x the x-coordinate of the pixel.
|
|
* @param y the y-coordinate of the pixel.
|
|
* @param b the band (in the range <code>0</code> to
|
|
* <code>getNumBands() - 1</code>).
|
|
*
|
|
* @return The sample value.
|
|
*
|
|
* @see #getSample(int, int, int)
|
|
*/
|
|
public float getSampleFloat(int x, int y, int b)
|
|
{
|
|
return sampleModel.getSampleFloat(x - sampleModelTranslateX,
|
|
y - sampleModelTranslateY, b, dataBuffer);
|
|
}
|
|
|
|
/**
|
|
* Returns the sample value for the pixel at (x, y) in the raster.
|
|
*
|
|
* @param x the x-coordinate of the pixel.
|
|
* @param y the y-coordinate of the pixel.
|
|
* @param b the band (in the range <code>0</code> to
|
|
* <code>getNumBands() - 1</code>).
|
|
*
|
|
* @return The sample value.
|
|
*
|
|
* @see #getSample(int, int, int)
|
|
*/
|
|
public double getSampleDouble(int x, int y, int b)
|
|
{
|
|
return sampleModel.getSampleDouble(x - sampleModelTranslateX,
|
|
y - sampleModelTranslateY, b, dataBuffer);
|
|
}
|
|
|
|
/**
|
|
* Returns an array containing the samples from one band for the pixels in
|
|
* the region specified by (x, y, w, h) in the raster. If
|
|
* <code>iArray</code> is not <code>null</code>, it will be
|
|
* populated with the sample values and returned as the result of this
|
|
* function (this avoids allocating a new array instance).
|
|
*
|
|
* @param x the x-coordinate of the top-left pixel.
|
|
* @param y the y-coordinate of the top-left pixel.
|
|
* @param w the width of the region of pixels.
|
|
* @param h the height of the region of pixels.
|
|
* @param b the band (in the range <code>0</code> to
|
|
* </code>getNumBands() - 1</code>).
|
|
* @param iArray an array to populate with the sample values and return as
|
|
* the result (if <code>null</code>, a new array will be allocated).
|
|
*
|
|
* @return The sample values.
|
|
*/
|
|
public int[] getSamples(int x, int y, int w, int h, int b,
|
|
int[] iArray)
|
|
{
|
|
return sampleModel.getSamples(x - sampleModelTranslateX,
|
|
y - sampleModelTranslateY, w, h, b, iArray, dataBuffer);
|
|
}
|
|
|
|
/**
|
|
* Returns an array containing the samples from one band for the pixels in
|
|
* the region specified by (x, y, w, h) in the raster. If
|
|
* <code>fArray</code> is not <code>null</code>, it will be
|
|
* populated with the sample values and returned as the result of this
|
|
* function (this avoids allocating a new array instance).
|
|
*
|
|
* @param x the x-coordinate of the top-left pixel.
|
|
* @param y the y-coordinate of the top-left pixel.
|
|
* @param w the width of the region of pixels.
|
|
* @param h the height of the region of pixels.
|
|
* @param b the band (in the range <code>0</code> to
|
|
* </code>getNumBands() - 1</code>).
|
|
* @param fArray an array to populate with the sample values and return as
|
|
* the result (if <code>null</code>, a new array will be allocated).
|
|
*
|
|
* @return The sample values.
|
|
*/
|
|
public float[] getSamples(int x, int y, int w, int h, int b, float[] fArray)
|
|
{
|
|
return sampleModel.getSamples(x - sampleModelTranslateX,
|
|
y - sampleModelTranslateY, w, h, b, fArray, dataBuffer);
|
|
}
|
|
|
|
/**
|
|
* Returns an array containing the samples from one band for the pixels in
|
|
* the region specified by (x, y, w, h) in the raster. If
|
|
* <code>dArray</code> is not <code>null</code>, it will be
|
|
* populated with the sample values and returned as the result of this
|
|
* function (this avoids allocating a new array instance).
|
|
*
|
|
* @param x the x-coordinate of the top-left pixel.
|
|
* @param y the y-coordinate of the top-left pixel.
|
|
* @param w the width of the region of pixels.
|
|
* @param h the height of the region of pixels.
|
|
* @param b the band (in the range <code>0</code> to
|
|
* </code>getNumBands() - 1</code>).
|
|
* @param dArray an array to populate with the sample values and return as
|
|
* the result (if <code>null</code>, a new array will be allocated).
|
|
*
|
|
* @return The sample values.
|
|
*/
|
|
public double[] getSamples(int x, int y, int w, int h, int b,
|
|
double[] dArray)
|
|
{
|
|
return sampleModel.getSamples(x - sampleModelTranslateX,
|
|
y - sampleModelTranslateY, w, h, b, dArray, dataBuffer);
|
|
}
|
|
|
|
/**
|
|
* Create a String representing the state of this Raster.
|
|
*
|
|
* @return A String representing the stat of this Raster.
|
|
*/
|
|
public String toString()
|
|
{
|
|
CPStringBuilder result = new CPStringBuilder();
|
|
|
|
result.append(getClass().getName());
|
|
result.append("[(");
|
|
result.append(minX).append(",").append(minY).append("), ");
|
|
result.append(width).append(" x ").append(height).append(",");
|
|
result.append(sampleModel).append(",");
|
|
result.append(dataBuffer);
|
|
result.append("]");
|
|
|
|
return result.toString();
|
|
}
|
|
|
|
/**
|
|
* Returns the number of bits used to represent the specified data type.
|
|
* Valid types are:
|
|
* <ul>
|
|
* <li>{@link DataBuffer#TYPE_BYTE};</li>
|
|
* <li>{@link DataBuffer#TYPE_USHORT};</li>
|
|
* <li>{@link DataBuffer#TYPE_SHORT};</li>
|
|
* <li>{@link DataBuffer#TYPE_INT};</li>
|
|
* <li>{@link DataBuffer#TYPE_FLOAT};</li>
|
|
* <li>{@link DataBuffer#TYPE_DOUBLE};</li>
|
|
* </ul>
|
|
* This method returns 0 for invalid data types.
|
|
*
|
|
* @param dataType the data type.
|
|
*
|
|
* @return The number of bits used to represent the specified data type.
|
|
*/
|
|
private static int getTypeBits(int dataType)
|
|
{
|
|
switch (dataType)
|
|
{
|
|
case DataBuffer.TYPE_BYTE:
|
|
return 8;
|
|
case DataBuffer.TYPE_USHORT:
|
|
case DataBuffer.TYPE_SHORT:
|
|
return 16;
|
|
case DataBuffer.TYPE_INT:
|
|
case DataBuffer.TYPE_FLOAT:
|
|
return 32;
|
|
case DataBuffer.TYPE_DOUBLE:
|
|
return 64;
|
|
default:
|
|
return 0;
|
|
}
|
|
}
|
|
}
|