mirror of git://gcc.gnu.org/git/gcc.git
935 lines
32 KiB
Java
935 lines
32 KiB
Java
/* Copyright (C) 2000, 2002, 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.awt.Buffers;
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import java.util.Arrays;
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/* FIXME: This class does not yet support data type TYPE_SHORT */
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/**
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* ComponentSampleModel supports a flexible organization of pixel samples in
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* memory, permitting pixel samples to be interleaved by band, by scanline,
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* and by pixel.
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*
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* A DataBuffer for this sample model has K banks of data. Pixels have N
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* samples, so there are N bands in the DataBuffer. Each band is completely
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* contained in one bank of data, but a bank may contain more than one band.
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* Each pixel sample is stored in a single data element.
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*
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* Within a bank, each band begins at an offset stored in bandOffsets. The
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* banks containing the band is given by bankIndices. Within the bank, there
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* are three dimensions - band, pixel, and scanline. The dimension ordering
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* is controlled by bandOffset, pixelStride, and scanlineStride, which means
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* that any combination of interleavings is supported.
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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 ComponentSampleModel extends SampleModel
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{
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/** The offsets to the first sample for each band. */
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protected int[] bandOffsets;
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/** The indices of the bank used to store each band in a data buffer. */
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protected int[] bankIndices;
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/**
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* The number of bands in the image.
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* @specnote This field shadows the protected numBands in SampleModel.
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*/
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protected int numBands;
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/** Used when creating data buffers. */
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protected int numBanks;
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/**
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* The number of data elements between a sample in one row and the
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* corresponding sample in the next row.
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*/
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protected int scanlineStride;
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/**
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* The number of data elements between a sample for one pixel and the
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* corresponding sample for the next pixel in the same row.
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*/
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protected int pixelStride;
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private boolean tightPixelPacking = false;
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/**
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* Creates a new sample model that assumes that all bands are stored in a
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* single bank of the {@link DataBuffer}.
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* <p>
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* Note that the <code>bandOffsets</code> array is copied to internal storage
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* to prevent subsequent changes to the array from affecting this object.
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*
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* @param dataType the data type (one of {@link DataBuffer#TYPE_BYTE},
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* {@link DataBuffer#TYPE_USHORT}, {@link DataBuffer#TYPE_SHORT},
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* {@link DataBuffer#TYPE_INT}, {@link DataBuffer#TYPE_FLOAT} or
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* {@link DataBuffer#TYPE_DOUBLE}).
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* @param w the width in pixels.
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* @param h the height in pixels.
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* @param pixelStride the number of data elements in the step from a sample
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* in one pixel to the corresponding sample in the next pixel.
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* @param scanlineStride the number of data elements in the step from a
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* sample in a pixel to the corresponding sample in the pixel in the next
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* row.
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* @param bandOffsets the offset to the first element for each band, with
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* the size of the array defining the number of bands (<code>null</code>
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* not permitted).
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*
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* @throws IllegalArgumentException if <code>dataType</code> is not one of
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* the specified values.
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* @throws IllegalArgumentException if <code>w</code> is less than or equal
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* to zero.
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* @throws IllegalArgumentException if <code>h</code> is less than or equal
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* to zero.
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* @throws IllegalArgumentException if <code>w * h</code> exceeds
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* {@link Integer#MAX_VALUE}.
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* @throws IllegalArgumentException if <code>pixelStride</code> is negative.
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* @throws IllegalArgumentException if <code>scanlineStride</code> is less
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* than or equal to zero.
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* @throws IllegalArgumentException if <code>bandOffsets</code> has zero
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* length.
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*/
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public ComponentSampleModel(int dataType,
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int w, int h,
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int pixelStride,
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int scanlineStride,
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int[] bandOffsets)
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{
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this(dataType, w, h, pixelStride, scanlineStride,
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new int[bandOffsets.length], bandOffsets);
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}
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/**
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* Creates a new sample model that assumes that all bands are stored in a
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* single bank of the {@link DataBuffer}.
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*
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* @param dataType the data type (one of {@link DataBuffer#TYPE_BYTE},
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* {@link DataBuffer#TYPE_USHORT}, {@link DataBuffer#TYPE_SHORT},
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* {@link DataBuffer#TYPE_INT}, {@link DataBuffer#TYPE_FLOAT} or
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* {@link DataBuffer#TYPE_DOUBLE}).
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* @param w the width in pixels.
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* @param h the height in pixels.
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* @param pixelStride the number of data elements in the step from a sample
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* in one pixel to the corresponding sample in the next pixel.
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* @param scanlineStride the number of data elements in the step from a
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* sample in a pixel to the corresponding sample in the pixel in the next
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* row.
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* @param bankIndices the index of the bank in which each band is stored
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* (<code>null</code> not permitted). This array is copied to internal
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* storage so that subsequent updates to the array do not affect the sample
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* model.
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* @param bandOffsets the offset to the first element for each band, with
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* the size of the array defining the number of bands (<code>null</code>
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* not permitted). This array is copied to internal storage so that
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* subsequent updates to the array do not affect the sample model.
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*
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* @throws IllegalArgumentException if <code>dataType</code> is not one of
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* the specified values.
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* @throws IllegalArgumentException if <code>w</code> is less than or equal
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* to zero.
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* @throws IllegalArgumentException if <code>h</code> is less than or equal
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* to zero.
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* @throws IllegalArgumentException if <code>w * h</code> exceeds
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* {@link Integer#MAX_VALUE}.
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* @throws IllegalArgumentException if <code>pixelStride</code> is negative.
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* @throws IllegalArgumentException if <code>scanlineStride</code> is less
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* than or equal to zero.
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* @throws IllegalArgumentException if <code>bandOffsets</code> has zero
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* length.
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*/
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public ComponentSampleModel(int dataType,
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int w, int h,
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int pixelStride,
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int scanlineStride,
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int[] bankIndices,
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int[] bandOffsets)
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{
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super(dataType, w, h, bandOffsets.length);
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// super permits DataBuffer.TYPE_UNDEFINED but this class doesn't...
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if (dataType == DataBuffer.TYPE_UNDEFINED)
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throw new IllegalArgumentException("Unsupported dataType.");
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if ((pixelStride < 0) || (scanlineStride < 0) || (bandOffsets.length < 1)
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|| (bandOffsets.length != bankIndices.length))
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throw new IllegalArgumentException();
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this.bandOffsets = (int[]) bandOffsets.clone();
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this.bankIndices = (int[]) bankIndices.clone();
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this.numBands = bandOffsets.length;
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this.numBanks = 0;
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for (int b = 0; b < bankIndices.length; b++)
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this.numBanks = Math.max(this.numBanks, bankIndices[b] + 1);
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this.scanlineStride = scanlineStride;
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this.pixelStride = pixelStride;
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// See if we can use some speedups
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/* FIXME: May these checks should be reserved for the
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PixelInterleavedSampleModel? */
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if (pixelStride == numBands)
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{
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tightPixelPacking = true;
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for (int b = 0; b < numBands; b++) {
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if ((bandOffsets[b] != b) || (bankIndices[b] != 0))
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{
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tightPixelPacking = false;
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break;
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}
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}
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}
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}
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/**
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* Creates a new sample model that is compatible with this one, but with the
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* specified dimensions.
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*
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* @param w the width (must be greater than zero).
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* @param h the height (must be greater than zero).
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*
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* @return A new sample model.
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*/
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public SampleModel createCompatibleSampleModel(int w, int h)
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{
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return new ComponentSampleModel(dataType, w, h, pixelStride,
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scanlineStride, bankIndices,
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bandOffsets);
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}
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/**
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* Creates a new sample model that provides access to a subset of the bands
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* that this sample model supports.
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*
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* @param bands the bands (<code>null</code> not permitted).
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*
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* @return The new sample model.
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*/
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public SampleModel createSubsetSampleModel(int[] bands)
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{
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int numBands = bands.length;
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int[] bankIndices = new int[numBands];
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int[] bandOffsets = new int[numBands];
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for (int b = 0; b < numBands; b++)
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{
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bankIndices[b] = this.bankIndices[bands[b]];
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bandOffsets[b] = this.bandOffsets[bands[b]];
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}
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return new ComponentSampleModel(dataType, width, height, pixelStride,
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scanlineStride, bankIndices,
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bandOffsets);
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}
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/**
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* Creates a new data buffer that is compatible with this sample model.
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*
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* @return The new data buffer.
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*/
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public DataBuffer createDataBuffer()
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{
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// Maybe this value should be precalculated in the constructor?
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int highestOffset = 0;
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for (int b = 0; b < numBands; b++)
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{
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highestOffset = Math.max(highestOffset, bandOffsets[b]);
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}
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int size = pixelStride * (width - 1) + scanlineStride * (height - 1)
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+ highestOffset + 1;
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return Buffers.createBuffer(getDataType(), size, numBanks);
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}
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/**
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* Returns the offset of the sample in band 0 for the pixel at location
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* <code>(x, y)</code>. This offset can be used to read a sample value from
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* a {@link DataBuffer}.
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*
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* @param x the x-coordinate.
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* @param y the y-coordinate.
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*
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* @return The offset.
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*
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* @see #getOffset(int, int, int)
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*/
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public int getOffset(int x, int y)
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{
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return getOffset(x, y, 0);
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}
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/**
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* Returns the offset of the sample in band <code>b</code> for the pixel at
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* location <code>(x, y)</code>. This offset can be used to read a sample
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* value from a {@link DataBuffer}.
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*
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* @param x the x-coordinate.
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* @param y the y-coordinate.
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* @param b the band index.
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*
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* @return The offset.
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*/
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public int getOffset(int x, int y, int b)
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{
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return bandOffsets[b] + pixelStride * x + scanlineStride * y;
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}
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/**
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* Returns the size in bits for each sample (one per band). For this sample
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* model, each band has the same sample size and this is determined by the
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* data type for the sample model.
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*
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* @return The sample sizes.
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*
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* @see SampleModel#getDataType()
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*/
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public final int[] getSampleSize()
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{
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int size = DataBuffer.getDataTypeSize(getDataType());
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int[] sizes = new int[numBands];
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java.util.Arrays.fill(sizes, size);
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return sizes;
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}
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/**
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* Returns the size in bits for the samples in the specified band. In this
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* class, the sample size is the same for every band and is determined from
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* the data type for the model.
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*
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* @param band the band index (ignored here).
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*
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* @return The sample size in bits.
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*
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* @see SampleModel#getDataType()
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*/
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public final int getSampleSize(int band)
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{
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return DataBuffer.getDataTypeSize(getDataType());
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}
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/**
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* Returns the indices of the bank(s) in the {@link DataBuffer} used to
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* store the samples for each band. The returned array is a copy, so that
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* altering it will not impact the sample model.
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*
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* @return The bank indices.
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*/
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public final int[] getBankIndices()
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{
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return (int[]) bankIndices.clone();
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}
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/**
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* Returns the offsets to the first sample in each band. The returned array
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* is a copy, so that altering it will not impact the sample model.
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*
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* @return The offsets.
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*/
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public final int[] getBandOffsets()
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{
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return (int[]) bandOffsets.clone();
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}
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/**
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* Returns the distance (in terms of element indices) between the sample for
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* one pixel and the corresponding sample for the equivalent pixel in the
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* next row. This is used in the calculation of the element offset for
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* retrieving samples from a {@link DataBuffer}.
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*
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* @return The distance between pixel samples in consecutive rows.
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*/
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public final int getScanlineStride()
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{
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return scanlineStride;
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}
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/**
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* Returns the distance (in terms of element indices) between the sample for
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* one pixel and the corresponding sample for the next pixel in a row. This
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* is used in the calculation of the element offset for retrieving samples
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* from a {@link DataBuffer}.
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*
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* @return The distance between pixel samples in the same row.
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*/
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public final int getPixelStride()
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{
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return pixelStride;
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}
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/**
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* Returns the number of data elements used to store the samples for one
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* pixel. In this model, this is the same as the number of bands.
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*
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* @return The number of data elements used to store the samples for one
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* pixel.
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*/
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public final int getNumDataElements()
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{
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return numBands;
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}
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/**
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* Returns the samples for the pixel at location <code>(x, y)</code> in
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* a primitive array (the array type is determined by the data type for
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* this model). The <code>obj</code> argument provides an option to supply
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* an existing array to hold the result, if this is <code>null</code> a new
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* array will be allocated.
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*
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* @param x the x-coordinate.
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* @param y the y-coordinate.
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* @param obj a primitive array that, if not <code>null</code>, will be
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* used to store and return the sample values.
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* @param data the data buffer (<code>null</code> not permitted).
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*
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* @return An array of sample values for the specified pixel.
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*/
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public Object getDataElements(int x, int y, Object obj, DataBuffer data)
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{
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int xyOffset = pixelStride * x + scanlineStride * y;
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int[] totalBandDataOffsets = new int[numBands];
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/* Notice that band and bank offsets are different. Band offsets
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are managed by the sample model, and bank offsets are managed
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by the data buffer. Both must be accounted for. */
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/* FIXME: For single pixels, it is probably easier to simple
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call getElem instead of calculating the bank offset ourself.
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On the other hand, then we need to push the value through
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the int type returned by the getElem method. */
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int[] bankOffsets = data.getOffsets();
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for (int b = 0; b < numBands; b++)
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{
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totalBandDataOffsets[b] = bandOffsets[b] + bankOffsets[bankIndices[b]]
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+ xyOffset;
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}
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try
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{
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switch (getTransferType())
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{
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case DataBuffer.TYPE_BYTE:
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DataBufferByte inByte = (DataBufferByte) data;
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byte[] outByte = (byte[]) obj;
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if (outByte == null)
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outByte = new byte[numBands];
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for (int b = 0; b < numBands; b++)
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{
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int dOffset = totalBandDataOffsets[b];
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outByte[b] = inByte.getData(bankIndices[b])[dOffset];
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}
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return outByte;
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case DataBuffer.TYPE_USHORT:
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DataBufferUShort inUShort = (DataBufferUShort) data;
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short[] outUShort = (short[]) obj;
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if (outUShort == null)
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outUShort = new short[numBands];
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for (int b = 0; b < numBands; b++)
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{
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int dOffset = totalBandDataOffsets[b];
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outUShort[b] = inUShort.getData(bankIndices[b])[dOffset];
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}
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return outUShort;
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case DataBuffer.TYPE_SHORT:
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DataBufferShort inShort = (DataBufferShort) data;
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short[] outShort = (short[]) obj;
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if (outShort == null)
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outShort = new short[numBands];
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for (int b = 0; b < numBands; b++)
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{
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int dOffset = totalBandDataOffsets[b];
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outShort[b] = inShort.getData(bankIndices[b])[dOffset];
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}
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return outShort;
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case DataBuffer.TYPE_INT:
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DataBufferInt inInt = (DataBufferInt) data;
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int[] outInt = (int[]) obj;
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if (outInt == null)
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outInt = new int[numBands];
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for (int b = 0; b < numBands; b++)
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{
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int dOffset = totalBandDataOffsets[b];
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outInt[b] = inInt.getData(bankIndices[b])[dOffset];
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}
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return outInt;
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case DataBuffer.TYPE_FLOAT:
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DataBufferFloat inFloat = (DataBufferFloat) data;
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float[] outFloat = (float[]) obj;
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if (outFloat == null)
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outFloat = new float[numBands];
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for (int b = 0; b < numBands; b++)
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{
|
|
int dOffset = totalBandDataOffsets[b];
|
|
outFloat[b] = inFloat.getData(bankIndices[b])[dOffset];
|
|
}
|
|
return outFloat;
|
|
|
|
case DataBuffer.TYPE_DOUBLE:
|
|
DataBufferDouble inDouble = (DataBufferDouble) data;
|
|
double[] outDouble = (double[]) obj;
|
|
if (outDouble == null)
|
|
outDouble = new double[numBands];
|
|
|
|
for (int b = 0; b < numBands; b++)
|
|
{
|
|
int dOffset = totalBandDataOffsets[b];
|
|
outDouble[b] = inDouble.getData(bankIndices[b])[dOffset];
|
|
}
|
|
return outDouble;
|
|
|
|
default:
|
|
throw new IllegalStateException("unknown transfer type "
|
|
+ getTransferType());
|
|
}
|
|
}
|
|
catch (ArrayIndexOutOfBoundsException aioobe)
|
|
{
|
|
String msg = "While reading data elements, " +
|
|
"x=" + x + ", y=" + y +", " + ", xyOffset=" + xyOffset +
|
|
", data.getSize()=" + data.getSize() + ": " + aioobe;
|
|
throw new ArrayIndexOutOfBoundsException(msg);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Returns the samples for the pixels in the region defined by
|
|
* <code>(x, y, w, h)</code> in a primitive array (the array type is
|
|
* determined by the data type for this model). The <code>obj</code>
|
|
* argument provides an option to supply an existing array to hold the
|
|
* result, if this is <code>null</code> a new array will be allocated.
|
|
*
|
|
* @param x the x-coordinate.
|
|
* @param y the y-coordinate.
|
|
* @param w the width.
|
|
* @param h the height.
|
|
* @param obj a primitive array that, if not <code>null</code>, will be
|
|
* used to store and return the sample values.
|
|
* @param data the data buffer (<code>null</code> not permitted).
|
|
*
|
|
* @return An array of sample values for the specified pixels.
|
|
*
|
|
* @see #setDataElements(int, int, int, int, Object, DataBuffer)
|
|
*/
|
|
public Object getDataElements(int x, int y, int w, int h, Object obj,
|
|
DataBuffer data)
|
|
{
|
|
if (!tightPixelPacking)
|
|
{
|
|
return super.getDataElements(x, y, w, h, obj, data);
|
|
}
|
|
|
|
// using get speedup
|
|
|
|
// We can copy whole rows
|
|
int rowSize = w * numBands;
|
|
int dataSize = rowSize * h;
|
|
|
|
DataBuffer transferBuffer = Buffers.createBuffer(getTransferType(), obj,
|
|
dataSize);
|
|
obj = Buffers.getData(transferBuffer);
|
|
|
|
int inOffset = pixelStride * x + scanlineStride * y + data.getOffset();
|
|
// Assumes only one band is used
|
|
|
|
/* We don't add band offsets since we assume that bands have
|
|
offsets 0, 1, 2, ... */
|
|
|
|
// See if we can copy everything in one go
|
|
if (scanlineStride == rowSize)
|
|
{
|
|
// Collapse scan lines:
|
|
rowSize *= h;
|
|
// We ignore scanlineStride since it won't be of any use
|
|
h = 1;
|
|
}
|
|
|
|
int outOffset = 0;
|
|
Object inArray = Buffers.getData(data);
|
|
for (int yd = 0; yd < h; yd++)
|
|
{
|
|
System.arraycopy(inArray, inOffset, obj, outOffset, rowSize);
|
|
inOffset += scanlineStride;
|
|
outOffset += rowSize;
|
|
}
|
|
return obj;
|
|
}
|
|
|
|
/**
|
|
* Sets the samples for the pixels in the region defined by
|
|
* <code>(x, y, w, h)</code> from a supplied primitive array (the array type
|
|
* must be consistent with the data type for this model).
|
|
*
|
|
* @param x the x-coordinate.
|
|
* @param y the y-coordinate.
|
|
* @param w the width.
|
|
* @param h the height.
|
|
* @param obj a primitive array containing the sample values.
|
|
* @param data the data buffer (<code>null</code> not permitted).
|
|
*
|
|
* @see #getDataElements(int, int, int, int, Object, DataBuffer)
|
|
*/
|
|
public void setDataElements(int x, int y, int w, int h,
|
|
Object obj, DataBuffer data)
|
|
{
|
|
if (!tightPixelPacking)
|
|
{
|
|
super.setDataElements(x, y, w, h, obj, data);
|
|
return;
|
|
}
|
|
|
|
// using set speedup, we can copy whole rows
|
|
int rowSize = w * numBands;
|
|
int dataSize = rowSize * h;
|
|
|
|
DataBuffer transferBuffer
|
|
= Buffers.createBufferFromData(getTransferType(), obj, dataSize);
|
|
|
|
int[] bankOffsets = data.getOffsets();
|
|
|
|
int outOffset = pixelStride * x + scanlineStride * y + bankOffsets[0];
|
|
// same assumptions as in get...
|
|
|
|
// See if we can copy everything in one go
|
|
if (scanlineStride == rowSize)
|
|
{
|
|
// Collapse scan lines:
|
|
rowSize *= h;
|
|
h = 1;
|
|
}
|
|
|
|
int inOffset = 0;
|
|
Object outArray = Buffers.getData(data);
|
|
for (int yd = 0; yd < h; yd++)
|
|
{
|
|
System.arraycopy(obj, inOffset, outArray, outOffset, rowSize);
|
|
outOffset += scanlineStride;
|
|
inOffset += rowSize;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Returns all the samples for the pixel at location <code>(x, y)</code>
|
|
* stored in the specified data buffer.
|
|
*
|
|
* @param x the x-coordinate.
|
|
* @param y the y-coordinate.
|
|
* @param iArray an array that will be populated with the sample values and
|
|
* returned as the result. The size of this array should be equal to the
|
|
* number of bands in the model. If the array is <code>null</code>, a new
|
|
* array is created.
|
|
* @param data the data buffer (<code>null</code> not permitted).
|
|
*
|
|
* @return The samples for the specified pixel.
|
|
*
|
|
* @see #setPixel(int, int, int[], DataBuffer)
|
|
*/
|
|
public int[] getPixel(int x, int y, int[] iArray, DataBuffer data)
|
|
{
|
|
int offset = pixelStride * x + scanlineStride * y;
|
|
if (iArray == null)
|
|
iArray = new int[numBands];
|
|
for (int b = 0; b < numBands; b++)
|
|
{
|
|
iArray[b] = data.getElem(bankIndices[b], offset + bandOffsets[b]);
|
|
}
|
|
return iArray;
|
|
}
|
|
|
|
/**
|
|
* Returns the samples for all the pixels in a rectangular region.
|
|
*
|
|
* @param x the x-coordinate.
|
|
* @param y the y-coordinate.
|
|
* @param w the width.
|
|
* @param h the height.
|
|
* @param iArray an array that if non-<code>null</code> will be populated
|
|
* with the sample values and returned as the result.
|
|
* @param data the data buffer (<code>null</code> not permitted).
|
|
*
|
|
* @return The samples for all the pixels in the rectangle.
|
|
*/
|
|
public int[] getPixels(int x, int y, int w, int h, int[] iArray,
|
|
DataBuffer data)
|
|
{
|
|
int offset = pixelStride * x + scanlineStride * y;
|
|
if (iArray == null)
|
|
iArray = new int[numBands * w * h];
|
|
int outOffset = 0;
|
|
for (y = 0; y < h; y++)
|
|
{
|
|
int lineOffset = offset;
|
|
for (x = 0; x < w; x++)
|
|
{
|
|
for (int b = 0; b < numBands; b++)
|
|
{
|
|
iArray[outOffset++]
|
|
= data.getElem(bankIndices[b], lineOffset+bandOffsets[b]);
|
|
}
|
|
lineOffset += pixelStride;
|
|
}
|
|
offset += scanlineStride;
|
|
}
|
|
return iArray;
|
|
}
|
|
|
|
/**
|
|
* Returns the sample for band <code>b</code> of the pixel at
|
|
* <code>(x, y)</code> that is stored in the specified data buffer.
|
|
*
|
|
* @param x the x-coordinate.
|
|
* @param y the y-coordinate.
|
|
* @param b the band index.
|
|
* @param data the data buffer (<code>null</code> not permitted).
|
|
*
|
|
* @return The sample value.
|
|
*
|
|
* @see #setSample(int, int, int, int, DataBuffer)
|
|
*/
|
|
public int getSample(int x, int y, int b, DataBuffer data)
|
|
{
|
|
return data.getElem(bankIndices[b], getOffset(x, y, b));
|
|
}
|
|
|
|
/**
|
|
* Sets the samples for the pixel at location <code>(x, y)</code> from the
|
|
* supplied primitive array (the array type must be consistent with the data
|
|
* type for this model).
|
|
*
|
|
* @param x the x-coordinate.
|
|
* @param y the y-coordinate.
|
|
* @param obj a primitive array containing the pixel's sample values.
|
|
* @param data the data buffer (<code>null</code> not permitted).
|
|
*
|
|
* @see #setDataElements(int, int, Object, DataBuffer)
|
|
*/
|
|
public void setDataElements(int x, int y, Object obj, DataBuffer data)
|
|
{
|
|
int offset = pixelStride * x + scanlineStride * y;
|
|
int[] totalBandDataOffsets = new int[numBands];
|
|
int[] bankOffsets = data.getOffsets();
|
|
for (int b = 0; b < numBands; b++)
|
|
totalBandDataOffsets[b] = bandOffsets[b] + bankOffsets[bankIndices[b]]
|
|
+ offset;
|
|
|
|
switch (getTransferType())
|
|
{
|
|
case DataBuffer.TYPE_BYTE:
|
|
{
|
|
DataBufferByte out = (DataBufferByte) data;
|
|
byte[] in = (byte[]) obj;
|
|
|
|
for (int b = 0; b < numBands; b++)
|
|
out.getData(bankIndices[b])[totalBandDataOffsets[b]] = in[b];
|
|
|
|
return;
|
|
}
|
|
case DataBuffer.TYPE_USHORT:
|
|
{
|
|
DataBufferUShort out = (DataBufferUShort) data;
|
|
short[] in = (short[]) obj;
|
|
|
|
for (int b = 0; b < numBands; b++)
|
|
out.getData(bankIndices[b])[totalBandDataOffsets[b]] = in[b];
|
|
|
|
return;
|
|
}
|
|
case DataBuffer.TYPE_SHORT:
|
|
{
|
|
DataBufferShort out = (DataBufferShort) data;
|
|
short[] in = (short[]) obj;
|
|
|
|
for (int b = 0; b < numBands; b++)
|
|
out.getData(bankIndices[b])[totalBandDataOffsets[b]] = in[b];
|
|
|
|
return;
|
|
}
|
|
case DataBuffer.TYPE_INT:
|
|
{
|
|
DataBufferInt out = (DataBufferInt) data;
|
|
int[] in = (int[]) obj;
|
|
|
|
for (int b = 0; b < numBands; b++)
|
|
out.getData(bankIndices[b])[totalBandDataOffsets[b]] = in[b];
|
|
|
|
return;
|
|
}
|
|
case DataBuffer.TYPE_FLOAT:
|
|
{
|
|
DataBufferFloat out = (DataBufferFloat) data;
|
|
float[] in = (float[]) obj;
|
|
|
|
for (int b = 0; b < numBands; b++)
|
|
out.getData(bankIndices[b])[totalBandDataOffsets[b]] = in[b];
|
|
|
|
return;
|
|
}
|
|
case DataBuffer.TYPE_DOUBLE:
|
|
{
|
|
DataBufferDouble out = (DataBufferDouble) data;
|
|
double[] in = (double[]) obj;
|
|
|
|
for (int b = 0; b < numBands; b++)
|
|
out.getData(bankIndices[b])[totalBandDataOffsets[b]] = in[b];
|
|
|
|
return;
|
|
}
|
|
default:
|
|
throw new UnsupportedOperationException("transfer type not " +
|
|
"implemented");
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Sets the sample values for the pixel at location <code>(x, y)</code>
|
|
* stored in the specified data buffer.
|
|
*
|
|
* @param x the x-coordinate.
|
|
* @param y the y-coordinate.
|
|
* @param iArray the pixel sample values (<code>null</code> not permitted).
|
|
* @param data the data buffer (<code>null</code> not permitted).
|
|
*
|
|
* @see #getPixel(int, int, int[], DataBuffer)
|
|
*/
|
|
public void setPixel(int x, int y, int[] iArray, DataBuffer data)
|
|
{
|
|
int offset = pixelStride * x + scanlineStride * y;
|
|
for (int b = 0; b < numBands; b++)
|
|
data.setElem(bankIndices[b], offset + bandOffsets[b], iArray[b]);
|
|
}
|
|
|
|
/**
|
|
* Sets the sample value for band <code>b</code> of the pixel at location
|
|
* <code>(x, y)</code> in the specified data buffer.
|
|
*
|
|
* @param x the x-coordinate.
|
|
* @param y the y-coordinate.
|
|
* @param b the band index.
|
|
* @param s the sample value.
|
|
* @param data the data buffer (<code>null</code> not permitted).
|
|
*
|
|
* @see #getSample(int, int, int, DataBuffer)
|
|
*/
|
|
public void setSample(int x, int y, int b, int s, DataBuffer data)
|
|
{
|
|
data.setElem(bankIndices[b], getOffset(x, y, b), s);
|
|
}
|
|
|
|
/**
|
|
* Tests this sample model for equality with an arbitrary object. Returns
|
|
* <code>true</code> if and only if:
|
|
* <ul>
|
|
* <li><code>obj</code> is not <code>null</code>;</li>
|
|
* <li><code>obj</code> is an instance of <code>ComponentSampleModel</code>;
|
|
* </li>
|
|
* <li>both models have the same values for the <code>dataType</code>,
|
|
* <code>width</code>, <code>height</code>, <code>pixelStride</code>,
|
|
* <code>scanlineStride</code>, <code>bandOffsets</code> and
|
|
* <code>bankIndices</code> fields.</li>
|
|
* </ul>
|
|
*
|
|
* @param obj the object to test (<code>null</code> permitted).
|
|
*
|
|
* @return <code>true</code> if this sample model is equal to
|
|
* <code>obj</code>, and <code>false</code> otherwise.
|
|
*/
|
|
public boolean equals(Object obj)
|
|
{
|
|
if (obj == null)
|
|
return false;
|
|
if (! (obj instanceof ComponentSampleModel))
|
|
return false;
|
|
ComponentSampleModel that = (ComponentSampleModel) obj;
|
|
if (this.dataType != that.dataType)
|
|
return false;
|
|
if (this.width != that.width)
|
|
return false;
|
|
if (this.height != that.height)
|
|
return false;
|
|
if (this.pixelStride != that.pixelStride)
|
|
return false;
|
|
if (this.scanlineStride != that.scanlineStride)
|
|
return false;
|
|
if (! Arrays.equals(this.bandOffsets, that.bandOffsets))
|
|
return false;
|
|
if (! Arrays.equals(this.bankIndices, that.bankIndices))
|
|
return false;
|
|
// couldn't find any difference, so...
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* Returns a hash code for this sample model.
|
|
*
|
|
* @return The hash code.
|
|
*/
|
|
public int hashCode()
|
|
{
|
|
// this computation is based on the method described in Chapter 3
|
|
// of Joshua Bloch's Effective Java...
|
|
int result = 17;
|
|
result = 37 * result + dataType;
|
|
result = 37 * result + width;
|
|
result = 37 * result + height;
|
|
result = 37 * result + pixelStride;
|
|
result = 37 * result + scanlineStride;
|
|
for (int i = 0; i < bandOffsets.length; i++)
|
|
result = 37 * result + bandOffsets[i];
|
|
for (int i = 0; i < bankIndices.length; i++)
|
|
result = 37 * result + bankIndices[i];
|
|
return result;
|
|
}
|
|
}
|