| /* |
| * Copyright (c) 1997, 2008, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| /* **************************************************************** |
| ****************************************************************** |
| ****************************************************************** |
| *** COPYRIGHT (c) Eastman Kodak Company, 1997 |
| *** As an unpublished work pursuant to Title 17 of the United |
| *** States Code. All rights reserved. |
| ****************************************************************** |
| ****************************************************************** |
| ******************************************************************/ |
| |
| package java.awt.image; |
| |
| import java.util.Arrays; |
| |
| /** |
| * This class represents image data which is stored such that each sample |
| * of a pixel occupies one data element of the DataBuffer. It stores the |
| * N samples which make up a pixel in N separate data array elements. |
| * Different bands may be in different banks of the DataBuffer. |
| * Accessor methods are provided so that image data can be manipulated |
| * directly. This class can support different kinds of interleaving, e.g. |
| * band interleaving, scanline interleaving, and pixel interleaving. |
| * Pixel stride is the number of data array elements between two samples |
| * for the same band on the same scanline. Scanline stride is the number |
| * of data array elements between a given sample and the corresponding sample |
| * in the same column of the next scanline. Band offsets denote the number |
| * of data array elements from the first data array element of the bank |
| * of the DataBuffer holding each band to the first sample of the band. |
| * The bands are numbered from 0 to N-1. This class can represent image |
| * data for which each sample is an unsigned integral number which can be |
| * stored in 8, 16, or 32 bits (using <code>DataBuffer.TYPE_BYTE</code>, |
| * <code>DataBuffer.TYPE_USHORT</code>, or <code>DataBuffer.TYPE_INT</code>, |
| * respectively), data for which each sample is a signed integral number |
| * which can be stored in 16 bits (using <code>DataBuffer.TYPE_SHORT</code>), |
| * or data for which each sample is a signed float or double quantity |
| * (using <code>DataBuffer.TYPE_FLOAT</code> or |
| * <code>DataBuffer.TYPE_DOUBLE</code>, respectively). |
| * All samples of a given ComponentSampleModel |
| * are stored with the same precision. All strides and offsets must be |
| * non-negative. This class supports |
| * {@link DataBuffer#TYPE_BYTE TYPE_BYTE}, |
| * {@link DataBuffer#TYPE_USHORT TYPE_USHORT}, |
| * {@link DataBuffer#TYPE_SHORT TYPE_SHORT}, |
| * {@link DataBuffer#TYPE_INT TYPE_INT}, |
| * {@link DataBuffer#TYPE_FLOAT TYPE_FLOAT}, |
| * {@link DataBuffer#TYPE_DOUBLE TYPE_DOUBLE}, |
| * @see java.awt.image.PixelInterleavedSampleModel |
| * @see java.awt.image.BandedSampleModel |
| */ |
| |
| public class ComponentSampleModel extends SampleModel |
| { |
| /** Offsets for all bands in data array elements. */ |
| protected int bandOffsets[]; |
| |
| /** Index for each bank storing a band of image data. */ |
| protected int[] bankIndices; |
| |
| /** |
| * The number of bands in this |
| * <code>ComponentSampleModel</code>. |
| */ |
| protected int numBands = 1; |
| |
| /** |
| * The number of banks in this |
| * <code>ComponentSampleModel</code>. |
| */ |
| protected int numBanks = 1; |
| |
| /** |
| * Line stride (in data array elements) of the region of image |
| * data described by this ComponentSampleModel. |
| */ |
| protected int scanlineStride; |
| |
| /** Pixel stride (in data array elements) of the region of image |
| * data described by this ComponentSampleModel. |
| */ |
| protected int pixelStride; |
| |
| static private native void initIDs(); |
| static { |
| ColorModel.loadLibraries(); |
| initIDs(); |
| } |
| |
| /** |
| * Constructs a ComponentSampleModel with the specified parameters. |
| * The number of bands will be given by the length of the bandOffsets array. |
| * All bands will be stored in the first bank of the DataBuffer. |
| * @param dataType the data type for storing samples |
| * @param w the width (in pixels) of the region of |
| * image data described |
| * @param h the height (in pixels) of the region of |
| * image data described |
| * @param pixelStride the pixel stride of the region of image |
| * data described |
| * @param scanlineStride the line stride of the region of image |
| * data described |
| * @param bandOffsets the offsets of all bands |
| * @throws IllegalArgumentException if <code>w</code> or |
| * <code>h</code> is not greater than 0 |
| * @throws IllegalArgumentException if <code>pixelStride</code> |
| * is less than 0 |
| * @throws IllegalArgumentException if <code>scanlineStride</code> |
| * is less than 0 |
| * @throws IllegalArgumentException if <code>numBands</code> |
| * is less than 1 |
| * @throws IllegalArgumentException if the product of <code>w</code> |
| * and <code>h</code> is greater than |
| * <code>Integer.MAX_VALUE</code> |
| * @throws IllegalArgumentException if <code>dataType</code> is not |
| * one of the supported data types |
| */ |
| public ComponentSampleModel(int dataType, |
| int w, int h, |
| int pixelStride, |
| int scanlineStride, |
| int bandOffsets[]) { |
| super(dataType, w, h, bandOffsets.length); |
| this.dataType = dataType; |
| this.pixelStride = pixelStride; |
| this.scanlineStride = scanlineStride; |
| this.bandOffsets = (int[])bandOffsets.clone(); |
| numBands = bandOffsets.length; |
| if (pixelStride < 0) { |
| throw new IllegalArgumentException("Pixel stride must be >= 0"); |
| } |
| // TODO - bug 4296691 - remove this check |
| if (scanlineStride < 0) { |
| throw new IllegalArgumentException("Scanline stride must be >= 0"); |
| } |
| if (numBands < 1) { |
| throw new IllegalArgumentException("Must have at least one band."); |
| } |
| if ((dataType < DataBuffer.TYPE_BYTE) || |
| (dataType > DataBuffer.TYPE_DOUBLE)) { |
| throw new IllegalArgumentException("Unsupported dataType."); |
| } |
| bankIndices = new int[numBands]; |
| for (int i=0; i<numBands; i++) { |
| bankIndices[i] = 0; |
| } |
| } |
| |
| |
| /** |
| * Constructs a ComponentSampleModel with the specified parameters. |
| * The number of bands will be given by the length of the bandOffsets array. |
| * Different bands may be stored in different banks of the DataBuffer. |
| * |
| * @param dataType the data type for storing samples |
| * @param w the width (in pixels) of the region of |
| * image data described |
| * @param h the height (in pixels) of the region of |
| * image data described |
| * @param pixelStride the pixel stride of the region of image |
| * data described |
| * @param scanlineStride The line stride of the region of image |
| * data described |
| * @param bankIndices the bank indices of all bands |
| * @param bandOffsets the band offsets of all bands |
| * @throws IllegalArgumentException if <code>w</code> or |
| * <code>h</code> is not greater than 0 |
| * @throws IllegalArgumentException if <code>pixelStride</code> |
| * is less than 0 |
| * @throws IllegalArgumentException if <code>scanlineStride</code> |
| * is less than 0 |
| * @throws IllegalArgumentException if the length of |
| * <code>bankIndices</code> does not equal the length of |
| * <code>bankOffsets</code> |
| * @throws IllegalArgumentException if any of the bank indices |
| * of <code>bandIndices</code> is less than 0 |
| * @throws IllegalArgumentException if <code>dataType</code> is not |
| * one of the supported data types |
| */ |
| public ComponentSampleModel(int dataType, |
| int w, int h, |
| int pixelStride, |
| int scanlineStride, |
| int bankIndices[], |
| int bandOffsets[]) { |
| super(dataType, w, h, bandOffsets.length); |
| this.dataType = dataType; |
| this.pixelStride = pixelStride; |
| this.scanlineStride = scanlineStride; |
| this.bandOffsets = (int[])bandOffsets.clone(); |
| this.bankIndices = (int[]) bankIndices.clone(); |
| if (pixelStride < 0) { |
| throw new IllegalArgumentException("Pixel stride must be >= 0"); |
| } |
| // TODO - bug 4296691 - remove this check |
| if (scanlineStride < 0) { |
| throw new IllegalArgumentException("Scanline stride must be >= 0"); |
| } |
| if ((dataType < DataBuffer.TYPE_BYTE) || |
| (dataType > DataBuffer.TYPE_DOUBLE)) { |
| throw new IllegalArgumentException("Unsupported dataType."); |
| } |
| int maxBank = bankIndices[0]; |
| if (maxBank < 0) { |
| throw new IllegalArgumentException("Index of bank 0 is less than "+ |
| "0 ("+maxBank+")"); |
| } |
| for (int i=1; i < bankIndices.length; i++) { |
| if (bankIndices[i] > maxBank) { |
| maxBank = bankIndices[i]; |
| } |
| else if (bankIndices[i] < 0) { |
| throw new IllegalArgumentException("Index of bank "+i+ |
| " is less than 0 ("+ |
| maxBank+")"); |
| } |
| } |
| numBanks = maxBank+1; |
| numBands = bandOffsets.length; |
| if (bandOffsets.length != bankIndices.length) { |
| throw new IllegalArgumentException("Length of bandOffsets must "+ |
| "equal length of bankIndices."); |
| } |
| } |
| |
| /** |
| * Returns the size of the data buffer (in data elements) needed |
| * for a data buffer that matches this ComponentSampleModel. |
| */ |
| private long getBufferSize() { |
| int maxBandOff=bandOffsets[0]; |
| for (int i=1; i<bandOffsets.length; i++) |
| maxBandOff = Math.max(maxBandOff,bandOffsets[i]); |
| |
| long size = 0; |
| if (maxBandOff >= 0) |
| size += maxBandOff+1; |
| if (pixelStride > 0) |
| size += pixelStride * (width-1); |
| if (scanlineStride > 0) |
| size += scanlineStride*(height-1); |
| return size; |
| } |
| |
| /** |
| * Preserves band ordering with new step factor... |
| */ |
| int []orderBands(int orig[], int step) { |
| int map[] = new int[orig.length]; |
| int ret[] = new int[orig.length]; |
| |
| for (int i=0; i<map.length; i++) map[i] = i; |
| |
| for (int i = 0; i < ret.length; i++) { |
| int index = i; |
| for (int j = i+1; j < ret.length; j++) { |
| if (orig[map[index]] > orig[map[j]]) { |
| index = j; |
| } |
| } |
| ret[map[index]] = i*step; |
| map[index] = map[i]; |
| } |
| return ret; |
| } |
| |
| /** |
| * Creates a new <code>ComponentSampleModel</code> with the specified |
| * width and height. The new <code>SampleModel</code> will have the same |
| * number of bands, storage data type, interleaving scheme, and |
| * pixel stride as this <code>SampleModel</code>. |
| * @param w the width of the resulting <code>SampleModel</code> |
| * @param h the height of the resulting <code>SampleModel</code> |
| * @return a new <code>ComponentSampleModel</code> with the specified size |
| * @throws IllegalArgumentException if <code>w</code> or |
| * <code>h</code> is not greater than 0 |
| */ |
| public SampleModel createCompatibleSampleModel(int w, int h) { |
| SampleModel ret=null; |
| long size; |
| int minBandOff=bandOffsets[0]; |
| int maxBandOff=bandOffsets[0]; |
| for (int i=1; i<bandOffsets.length; i++) { |
| minBandOff = Math.min(minBandOff,bandOffsets[i]); |
| maxBandOff = Math.max(maxBandOff,bandOffsets[i]); |
| } |
| maxBandOff -= minBandOff; |
| |
| int bands = bandOffsets.length; |
| int bandOff[]; |
| int pStride = Math.abs(pixelStride); |
| int lStride = Math.abs(scanlineStride); |
| int bStride = Math.abs(maxBandOff); |
| |
| if (pStride > lStride) { |
| if (pStride > bStride) { |
| if (lStride > bStride) { // pix > line > band |
| bandOff = new int[bandOffsets.length]; |
| for (int i=0; i<bands; i++) |
| bandOff[i] = bandOffsets[i]-minBandOff; |
| lStride = bStride+1; |
| pStride = lStride*h; |
| } else { // pix > band > line |
| bandOff = orderBands(bandOffsets,lStride*h); |
| pStride = bands*lStride*h; |
| } |
| } else { // band > pix > line |
| pStride = lStride*h; |
| bandOff = orderBands(bandOffsets,pStride*w); |
| } |
| } else { |
| if (pStride > bStride) { // line > pix > band |
| bandOff = new int[bandOffsets.length]; |
| for (int i=0; i<bands; i++) |
| bandOff[i] = bandOffsets[i]-minBandOff; |
| pStride = bStride+1; |
| lStride = pStride*w; |
| } else { |
| if (lStride > bStride) { // line > band > pix |
| bandOff = orderBands(bandOffsets,pStride*w); |
| lStride = bands*pStride*w; |
| } else { // band > line > pix |
| lStride = pStride*w; |
| bandOff = orderBands(bandOffsets,lStride*h); |
| } |
| } |
| } |
| |
| // make sure we make room for negative offsets... |
| int base = 0; |
| if (scanlineStride < 0) { |
| base += lStride*h; |
| lStride *= -1; |
| } |
| if (pixelStride < 0) { |
| base += pStride*w; |
| pStride *= -1; |
| } |
| |
| for (int i=0; i<bands; i++) |
| bandOff[i] += base; |
| return new ComponentSampleModel(dataType, w, h, pStride, |
| lStride, bankIndices, bandOff); |
| } |
| |
| /** |
| * Creates a new ComponentSampleModel with a subset of the bands |
| * of this ComponentSampleModel. The new ComponentSampleModel can be |
| * used with any DataBuffer that the existing ComponentSampleModel |
| * can be used with. The new ComponentSampleModel/DataBuffer |
| * combination will represent an image with a subset of the bands |
| * of the original ComponentSampleModel/DataBuffer combination. |
| * @param bands a subset of bands from this |
| * <code>ComponentSampleModel</code> |
| * @return a <code>ComponentSampleModel</code> created with a subset |
| * of bands from this <code>ComponentSampleModel</code>. |
| */ |
| public SampleModel createSubsetSampleModel(int bands[]) { |
| if (bands.length > bankIndices.length) |
| throw new RasterFormatException("There are only " + |
| bankIndices.length + |
| " bands"); |
| int newBankIndices[] = new int[bands.length]; |
| int newBandOffsets[] = new int[bands.length]; |
| |
| for (int i=0; i<bands.length; i++) { |
| newBankIndices[i] = bankIndices[bands[i]]; |
| newBandOffsets[i] = bandOffsets[bands[i]]; |
| } |
| |
| return new ComponentSampleModel(this.dataType, width, height, |
| this.pixelStride, |
| this.scanlineStride, |
| newBankIndices, newBandOffsets); |
| } |
| |
| /** |
| * Creates a <code>DataBuffer</code> that corresponds to this |
| * <code>ComponentSampleModel</code>. |
| * The <code>DataBuffer</code> object's data type, number of banks, |
| * and size are be consistent with this <code>ComponentSampleModel</code>. |
| * @return a <code>DataBuffer</code> whose data type, number of banks |
| * and size are consistent with this |
| * <code>ComponentSampleModel</code>. |
| */ |
| public DataBuffer createDataBuffer() { |
| DataBuffer dataBuffer = null; |
| |
| int size = (int)getBufferSize(); |
| switch (dataType) { |
| case DataBuffer.TYPE_BYTE: |
| dataBuffer = new DataBufferByte(size, numBanks); |
| break; |
| case DataBuffer.TYPE_USHORT: |
| dataBuffer = new DataBufferUShort(size, numBanks); |
| break; |
| case DataBuffer.TYPE_SHORT: |
| dataBuffer = new DataBufferShort(size, numBanks); |
| break; |
| case DataBuffer.TYPE_INT: |
| dataBuffer = new DataBufferInt(size, numBanks); |
| break; |
| case DataBuffer.TYPE_FLOAT: |
| dataBuffer = new DataBufferFloat(size, numBanks); |
| break; |
| case DataBuffer.TYPE_DOUBLE: |
| dataBuffer = new DataBufferDouble(size, numBanks); |
| break; |
| } |
| |
| return dataBuffer; |
| } |
| |
| |
| /** Gets the offset for the first band of pixel (x,y). |
| * A sample of the first band can be retrieved from a |
| * <code>DataBuffer</code> |
| * <code>data</code> with a <code>ComponentSampleModel</code> |
| * <code>csm</code> as |
| * <pre> |
| * data.getElem(csm.getOffset(x, y)); |
| * </pre> |
| * @param x the X location of the pixel |
| * @param y the Y location of the pixel |
| * @return the offset for the first band of the specified pixel. |
| */ |
| public int getOffset(int x, int y) { |
| int offset = y*scanlineStride + x*pixelStride + bandOffsets[0]; |
| return offset; |
| } |
| |
| /** Gets the offset for band b of pixel (x,y). |
| * A sample of band <code>b</code> can be retrieved from a |
| * <code>DataBuffer</code> <code>data</code> |
| * with a <code>ComponentSampleModel</code> <code>csm</code> as |
| * <pre> |
| * data.getElem(csm.getOffset(x, y, b)); |
| * </pre> |
| * @param x the X location of the specified pixel |
| * @param y the Y location of the specified pixel |
| * @param b the specified band |
| * @return the offset for the specified band of the specified pixel. |
| */ |
| public int getOffset(int x, int y, int b) { |
| int offset = y*scanlineStride + x*pixelStride + bandOffsets[b]; |
| return offset; |
| } |
| |
| /** Returns the number of bits per sample for all bands. |
| * @return an array containing the number of bits per sample |
| * for all bands, where each element in the array |
| * represents a band. |
| */ |
| public final int[] getSampleSize() { |
| int sampleSize[] = new int [numBands]; |
| int sizeInBits = getSampleSize(0); |
| |
| for (int i=0; i<numBands; i++) |
| sampleSize[i] = sizeInBits; |
| |
| return sampleSize; |
| } |
| |
| /** Returns the number of bits per sample for the specified band. |
| * @param band the specified band |
| * @return the number of bits per sample for the specified band. |
| */ |
| public final int getSampleSize(int band) { |
| return DataBuffer.getDataTypeSize(dataType); |
| } |
| |
| /** Returns the bank indices for all bands. |
| * @return the bank indices for all bands. |
| */ |
| public final int [] getBankIndices() { |
| return (int[]) bankIndices.clone(); |
| } |
| |
| /** Returns the band offset for all bands. |
| * @return the band offsets for all bands. |
| */ |
| public final int [] getBandOffsets() { |
| return (int[])bandOffsets.clone(); |
| } |
| |
| /** Returns the scanline stride of this ComponentSampleModel. |
| * @return the scanline stride of this <code>ComponentSampleModel</code>. |
| */ |
| public final int getScanlineStride() { |
| return scanlineStride; |
| } |
| |
| /** Returns the pixel stride of this ComponentSampleModel. |
| * @return the pixel stride of this <code>ComponentSampleModel</code>. |
| */ |
| public final int getPixelStride() { |
| return pixelStride; |
| } |
| |
| /** |
| * Returns the number of data elements needed to transfer a pixel |
| * with the |
| * {@link #getDataElements(int, int, Object, DataBuffer) } and |
| * {@link #setDataElements(int, int, Object, DataBuffer) } |
| * methods. |
| * For a <code>ComponentSampleModel</code>, this is identical to the |
| * number of bands. |
| * @return the number of data elements needed to transfer a pixel with |
| * the <code>getDataElements</code> and |
| * <code>setDataElements</code> methods. |
| * @see java.awt.image.SampleModel#getNumDataElements |
| * @see #getNumBands |
| */ |
| public final int getNumDataElements() { |
| return getNumBands(); |
| } |
| |
| /** |
| * Returns data for a single pixel in a primitive array of type |
| * <code>TransferType</code>. For a <code>ComponentSampleModel</code>, |
| * this is the same as the data type, and samples are returned |
| * one per array element. Generally, <code>obj</code> should |
| * be passed in as <code>null</code>, so that the <code>Object</code> |
| * is created automatically and is the right primitive data type. |
| * <p> |
| * The following code illustrates transferring data for one pixel from |
| * <code>DataBuffer</code> <code>db1</code>, whose storage layout is |
| * described by <code>ComponentSampleModel</code> <code>csm1</code>, |
| * to <code>DataBuffer</code> <code>db2</code>, whose storage layout |
| * is described by <code>ComponentSampleModel</code> <code>csm2</code>. |
| * The transfer is usually more efficient than using |
| * <code>getPixel</code> and <code>setPixel</code>. |
| * <pre> |
| * ComponentSampleModel csm1, csm2; |
| * DataBufferInt db1, db2; |
| * csm2.setDataElements(x, y, |
| * csm1.getDataElements(x, y, null, db1), db2); |
| * </pre> |
| * |
| * Using <code>getDataElements</code> and <code>setDataElements</code> |
| * to transfer between two <code>DataBuffer/SampleModel</code> |
| * pairs is legitimate if the <code>SampleModel</code> objects have |
| * the same number of bands, corresponding bands have the same number of |
| * bits per sample, and the <code>TransferType</code>s are the same. |
| * <p> |
| * If <code>obj</code> is not <code>null</code>, it should be a |
| * primitive array of type <code>TransferType</code>. |
| * Otherwise, a <code>ClassCastException</code> is thrown. An |
| * <code>ArrayIndexOutOfBoundsException</code> might be thrown if the |
| * coordinates are not in bounds, or if <code>obj</code> is not |
| * <code>null</code> and is not large enough to hold |
| * the pixel data. |
| * |
| * @param x the X coordinate of the pixel location |
| * @param y the Y coordinate of the pixel location |
| * @param obj if non-<code>null</code>, a primitive array |
| * in which to return the pixel data |
| * @param data the <code>DataBuffer</code> containing the image data |
| * @return the data of the specified pixel |
| * @see #setDataElements(int, int, Object, DataBuffer) |
| * |
| * @throws NullPointerException if data is null. |
| * @throws ArrayIndexOutOfBoundsException if the coordinates are |
| * not in bounds, or if obj is too small to hold the ouput. |
| */ |
| public Object getDataElements(int x, int y, Object obj, DataBuffer data) { |
| if ((x < 0) || (y < 0) || (x >= width) || (y >= height)) { |
| throw new ArrayIndexOutOfBoundsException |
| ("Coordinate out of bounds!"); |
| } |
| |
| int type = getTransferType(); |
| int numDataElems = getNumDataElements(); |
| int pixelOffset = y*scanlineStride + x*pixelStride; |
| |
| switch(type) { |
| |
| case DataBuffer.TYPE_BYTE: |
| |
| byte[] bdata; |
| |
| if (obj == null) |
| bdata = new byte[numDataElems]; |
| else |
| bdata = (byte[])obj; |
| |
| for (int i=0; i<numDataElems; i++) { |
| bdata[i] = (byte)data.getElem(bankIndices[i], |
| pixelOffset + bandOffsets[i]); |
| } |
| |
| obj = (Object)bdata; |
| break; |
| |
| case DataBuffer.TYPE_USHORT: |
| case DataBuffer.TYPE_SHORT: |
| |
| short[] sdata; |
| |
| if (obj == null) |
| sdata = new short[numDataElems]; |
| else |
| sdata = (short[])obj; |
| |
| for (int i=0; i<numDataElems; i++) { |
| sdata[i] = (short)data.getElem(bankIndices[i], |
| pixelOffset + bandOffsets[i]); |
| } |
| |
| obj = (Object)sdata; |
| break; |
| |
| case DataBuffer.TYPE_INT: |
| |
| int[] idata; |
| |
| if (obj == null) |
| idata = new int[numDataElems]; |
| else |
| idata = (int[])obj; |
| |
| for (int i=0; i<numDataElems; i++) { |
| idata[i] = data.getElem(bankIndices[i], |
| pixelOffset + bandOffsets[i]); |
| } |
| |
| obj = (Object)idata; |
| break; |
| |
| case DataBuffer.TYPE_FLOAT: |
| |
| float[] fdata; |
| |
| if (obj == null) |
| fdata = new float[numDataElems]; |
| else |
| fdata = (float[])obj; |
| |
| for (int i=0; i<numDataElems; i++) { |
| fdata[i] = data.getElemFloat(bankIndices[i], |
| pixelOffset + bandOffsets[i]); |
| } |
| |
| obj = (Object)fdata; |
| break; |
| |
| case DataBuffer.TYPE_DOUBLE: |
| |
| double[] ddata; |
| |
| if (obj == null) |
| ddata = new double[numDataElems]; |
| else |
| ddata = (double[])obj; |
| |
| for (int i=0; i<numDataElems; i++) { |
| ddata[i] = data.getElemDouble(bankIndices[i], |
| pixelOffset + bandOffsets[i]); |
| } |
| |
| obj = (Object)ddata; |
| break; |
| } |
| |
| return obj; |
| } |
| |
| /** |
| * Returns all samples for the specified pixel in an int array, |
| * one sample per array element. |
| * An <code>ArrayIndexOutOfBoundsException</code> might be thrown if |
| * the coordinates are not in bounds. |
| * @param x the X coordinate of the pixel location |
| * @param y the Y coordinate of the pixel location |
| * @param iArray If non-null, returns the samples in this array |
| * @param data The DataBuffer containing the image data |
| * @return the samples of the specified pixel. |
| * @see #setPixel(int, int, int[], DataBuffer) |
| * |
| * @throws NullPointerException if data is null. |
| * @throws ArrayIndexOutOfBoundsException if the coordinates are |
| * not in bounds, or if iArray is too small to hold the output. |
| */ |
| public int[] getPixel(int x, int y, int iArray[], DataBuffer data) { |
| if ((x < 0) || (y < 0) || (x >= width) || (y >= height)) { |
| throw new ArrayIndexOutOfBoundsException |
| ("Coordinate out of bounds!"); |
| } |
| int pixels[]; |
| if (iArray != null) { |
| pixels = iArray; |
| } else { |
| pixels = new int [numBands]; |
| } |
| int pixelOffset = y*scanlineStride + x*pixelStride; |
| for (int i=0; i<numBands; i++) { |
| pixels[i] = data.getElem(bankIndices[i], |
| pixelOffset + bandOffsets[i]); |
| } |
| return pixels; |
| } |
| |
| /** |
| * Returns all samples for the specified rectangle of pixels in |
| * an int array, one sample per array element. |
| * An <code>ArrayIndexOutOfBoundsException</code> might be thrown if |
| * the coordinates are not in bounds. |
| * @param x The X coordinate of the upper left pixel location |
| * @param y The Y coordinate of the upper left pixel location |
| * @param w The width of the pixel rectangle |
| * @param h The height of the pixel rectangle |
| * @param iArray If non-null, returns the samples in this array |
| * @param data The DataBuffer containing the image data |
| * @return the samples of the pixels within the specified region. |
| * @see #setPixels(int, int, int, int, int[], DataBuffer) |
| */ |
| public int[] getPixels(int x, int y, int w, int h, |
| int iArray[], DataBuffer data) { |
| if ((x < 0) || (y < 0) || (x + w > width) || (y + h > height)) { |
| throw new ArrayIndexOutOfBoundsException |
| ("Coordinate out of bounds!"); |
| } |
| int pixels[]; |
| if (iArray != null) { |
| pixels = iArray; |
| } else { |
| pixels = new int [w*h*numBands]; |
| } |
| int lineOffset = y*scanlineStride + x*pixelStride; |
| int srcOffset = 0; |
| |
| for (int i = 0; i < h; i++) { |
| int pixelOffset = lineOffset; |
| for (int j = 0; j < w; j++) { |
| for (int k=0; k < numBands; k++) { |
| pixels[srcOffset++] = |
| data.getElem(bankIndices[k], pixelOffset + bandOffsets[k]); |
| } |
| pixelOffset += pixelStride; |
| } |
| lineOffset += scanlineStride; |
| } |
| return pixels; |
| } |
| |
| /** |
| * Returns as int the sample in a specified band for the pixel |
| * located at (x,y). |
| * An <code>ArrayIndexOutOfBoundsException</code> might be thrown if |
| * the coordinates are not in bounds. |
| * @param x the X coordinate of the pixel location |
| * @param y the Y coordinate of the pixel location |
| * @param b the band to return |
| * @param data the <code>DataBuffer</code> containing the image data |
| * @return the sample in a specified band for the specified pixel |
| * @see #setSample(int, int, int, int, DataBuffer) |
| */ |
| public int getSample(int x, int y, int b, DataBuffer data) { |
| // Bounds check for 'b' will be performed automatically |
| if ((x < 0) || (y < 0) || (x >= width) || (y >= height)) { |
| throw new ArrayIndexOutOfBoundsException |
| ("Coordinate out of bounds!"); |
| } |
| int sample = data.getElem(bankIndices[b], |
| y*scanlineStride + x*pixelStride + |
| bandOffsets[b]); |
| return sample; |
| } |
| |
| /** |
| * Returns the sample in a specified band |
| * for the pixel located at (x,y) as a float. |
| * An <code>ArrayIndexOutOfBoundsException</code> might be |
| * thrown if the coordinates are not in bounds. |
| * @param x The X coordinate of the pixel location |
| * @param y The Y coordinate of the pixel location |
| * @param b The band to return |
| * @param data The DataBuffer containing the image data |
| * @return a float value representing the sample in the specified |
| * band for the specified pixel. |
| */ |
| public float getSampleFloat(int x, int y, int b, DataBuffer data) { |
| // Bounds check for 'b' will be performed automatically |
| if ((x < 0) || (y < 0) || (x >= width) || (y >= height)) { |
| throw new ArrayIndexOutOfBoundsException |
| ("Coordinate out of bounds!"); |
| } |
| |
| float sample = data.getElemFloat(bankIndices[b], |
| y*scanlineStride + x*pixelStride + |
| bandOffsets[b]); |
| return sample; |
| } |
| |
| /** |
| * Returns the sample in a specified band |
| * for a pixel located at (x,y) as a double. |
| * An <code>ArrayIndexOutOfBoundsException</code> might be |
| * thrown if the coordinates are not in bounds. |
| * @param x The X coordinate of the pixel location |
| * @param y The Y coordinate of the pixel location |
| * @param b The band to return |
| * @param data The DataBuffer containing the image data |
| * @return a double value representing the sample in the specified |
| * band for the specified pixel. |
| */ |
| public double getSampleDouble(int x, int y, int b, DataBuffer data) { |
| // Bounds check for 'b' will be performed automatically |
| if ((x < 0) || (y < 0) || (x >= width) || (y >= height)) { |
| throw new ArrayIndexOutOfBoundsException |
| ("Coordinate out of bounds!"); |
| } |
| |
| double sample = data.getElemDouble(bankIndices[b], |
| y*scanlineStride + x*pixelStride + |
| bandOffsets[b]); |
| return sample; |
| } |
| |
| /** |
| * Returns the samples in a specified band for the specified rectangle |
| * of pixels in an int array, one sample per data array element. |
| * An <code>ArrayIndexOutOfBoundsException</code> might be thrown if |
| * the coordinates are not in bounds. |
| * @param x The X coordinate of the upper left pixel location |
| * @param y The Y coordinate of the upper left pixel location |
| * @param w the width of the pixel rectangle |
| * @param h the height of the pixel rectangle |
| * @param b the band to return |
| * @param iArray if non-<code>null</code>, returns the samples |
| * in this array |
| * @param data the <code>DataBuffer</code> containing the image data |
| * @return the samples in the specified band of the specified pixel |
| * @see #setSamples(int, int, int, int, int, int[], DataBuffer) |
| */ |
| public int[] getSamples(int x, int y, int w, int h, int b, |
| int iArray[], DataBuffer data) { |
| // Bounds check for 'b' will be performed automatically |
| if ((x < 0) || (y < 0) || (x + w > width) || (y + h > height)) { |
| throw new ArrayIndexOutOfBoundsException |
| ("Coordinate out of bounds!"); |
| } |
| int samples[]; |
| if (iArray != null) { |
| samples = iArray; |
| } else { |
| samples = new int [w*h]; |
| } |
| int lineOffset = y*scanlineStride + x*pixelStride + bandOffsets[b]; |
| int srcOffset = 0; |
| |
| for (int i = 0; i < h; i++) { |
| int sampleOffset = lineOffset; |
| for (int j = 0; j < w; j++) { |
| samples[srcOffset++] = data.getElem(bankIndices[b], |
| sampleOffset); |
| sampleOffset += pixelStride; |
| } |
| lineOffset += scanlineStride; |
| } |
| return samples; |
| } |
| |
| /** |
| * Sets the data for a single pixel in the specified |
| * <code>DataBuffer</code> from a primitive array of type |
| * <code>TransferType</code>. For a <code>ComponentSampleModel</code>, |
| * this is the same as the data type, and samples are transferred |
| * one per array element. |
| * <p> |
| * The following code illustrates transferring data for one pixel from |
| * <code>DataBuffer</code> <code>db1</code>, whose storage layout is |
| * described by <code>ComponentSampleModel</code> <code>csm1</code>, |
| * to <code>DataBuffer</code> <code>db2</code>, whose storage layout |
| * is described by <code>ComponentSampleModel</code> <code>csm2</code>. |
| * The transfer is usually more efficient than using |
| * <code>getPixel</code> and <code>setPixel</code>. |
| * <pre> |
| * ComponentSampleModel csm1, csm2; |
| * DataBufferInt db1, db2; |
| * csm2.setDataElements(x, y, csm1.getDataElements(x, y, null, db1), |
| * db2); |
| * </pre> |
| * Using <code>getDataElements</code> and <code>setDataElements</code> |
| * to transfer between two <code>DataBuffer/SampleModel</code> pairs |
| * is legitimate if the <code>SampleModel</code> objects have |
| * the same number of bands, corresponding bands have the same number of |
| * bits per sample, and the <code>TransferType</code>s are the same. |
| * <p> |
| * A <code>ClassCastException</code> is thrown if <code>obj</code> is not |
| * a primitive array of type <code>TransferType</code>. |
| * An <code>ArrayIndexOutOfBoundsException</code> might be thrown if |
| * the coordinates are not in bounds, or if <code>obj</code> is not large |
| * enough to hold the pixel data. |
| * @param x the X coordinate of the pixel location |
| * @param y the Y coordinate of the pixel location |
| * @param obj a primitive array containing pixel data |
| * @param data the DataBuffer containing the image data |
| * @see #getDataElements(int, int, Object, DataBuffer) |
| */ |
| public void setDataElements(int x, int y, Object obj, DataBuffer data) { |
| if ((x < 0) || (y < 0) || (x >= width) || (y >= height)) { |
| throw new ArrayIndexOutOfBoundsException |
| ("Coordinate out of bounds!"); |
| } |
| |
| int type = getTransferType(); |
| int numDataElems = getNumDataElements(); |
| int pixelOffset = y*scanlineStride + x*pixelStride; |
| |
| switch(type) { |
| |
| case DataBuffer.TYPE_BYTE: |
| |
| byte[] barray = (byte[])obj; |
| |
| for (int i=0; i<numDataElems; i++) { |
| data.setElem(bankIndices[i], pixelOffset + bandOffsets[i], |
| ((int)barray[i])&0xff); |
| } |
| break; |
| |
| case DataBuffer.TYPE_USHORT: |
| case DataBuffer.TYPE_SHORT: |
| |
| short[] sarray = (short[])obj; |
| |
| for (int i=0; i<numDataElems; i++) { |
| data.setElem(bankIndices[i], pixelOffset + bandOffsets[i], |
| ((int)sarray[i])&0xffff); |
| } |
| break; |
| |
| case DataBuffer.TYPE_INT: |
| |
| int[] iarray = (int[])obj; |
| |
| for (int i=0; i<numDataElems; i++) { |
| data.setElem(bankIndices[i], |
| pixelOffset + bandOffsets[i], iarray[i]); |
| } |
| break; |
| |
| case DataBuffer.TYPE_FLOAT: |
| |
| float[] farray = (float[])obj; |
| |
| for (int i=0; i<numDataElems; i++) { |
| data.setElemFloat(bankIndices[i], |
| pixelOffset + bandOffsets[i], farray[i]); |
| } |
| break; |
| |
| case DataBuffer.TYPE_DOUBLE: |
| |
| double[] darray = (double[])obj; |
| |
| for (int i=0; i<numDataElems; i++) { |
| data.setElemDouble(bankIndices[i], |
| pixelOffset + bandOffsets[i], darray[i]); |
| } |
| break; |
| |
| } |
| } |
| |
| /** |
| * Sets a pixel in the <code>DataBuffer</code> using an int array of |
| * samples for input. An <code>ArrayIndexOutOfBoundsException</code> |
| * might be thrown if the coordinates are |
| * not in bounds. |
| * @param x The X coordinate of the pixel location |
| * @param y The Y coordinate of the pixel location |
| * @param iArray The input samples in an int array |
| * @param data The DataBuffer containing the image data |
| * @see #getPixel(int, int, int[], DataBuffer) |
| */ |
| public void setPixel(int x, int y, int iArray[], DataBuffer data) { |
| if ((x < 0) || (y < 0) || (x >= width) || (y >= height)) { |
| throw new ArrayIndexOutOfBoundsException |
| ("Coordinate out of bounds!"); |
| } |
| int pixelOffset = y*scanlineStride + x*pixelStride; |
| for (int i=0; i<numBands; i++) { |
| data.setElem(bankIndices[i], |
| pixelOffset + bandOffsets[i],iArray[i]); |
| } |
| } |
| |
| /** |
| * Sets all samples for a rectangle of pixels from an int array containing |
| * one sample per array element. |
| * An <code>ArrayIndexOutOfBoundsException</code> might be thrown if the |
| * coordinates are not in bounds. |
| * @param x The X coordinate of the upper left pixel location |
| * @param y The Y coordinate of the upper left pixel location |
| * @param w The width of the pixel rectangle |
| * @param h The height of the pixel rectangle |
| * @param iArray The input samples in an int array |
| * @param data The DataBuffer containing the image data |
| * @see #getPixels(int, int, int, int, int[], DataBuffer) |
| */ |
| public void setPixels(int x, int y, int w, int h, |
| int iArray[], DataBuffer data) { |
| if ((x < 0) || (y < 0) || (x + w > width) || (y + h > height)) { |
| throw new ArrayIndexOutOfBoundsException |
| ("Coordinate out of bounds!"); |
| } |
| |
| int lineOffset = y*scanlineStride + x*pixelStride; |
| int srcOffset = 0; |
| |
| for (int i = 0; i < h; i++) { |
| int pixelOffset = lineOffset; |
| for (int j = 0; j < w; j++) { |
| for (int k=0; k < numBands; k++) { |
| data.setElem(bankIndices[k], pixelOffset + bandOffsets[k], |
| iArray[srcOffset++]); |
| } |
| pixelOffset += pixelStride; |
| } |
| lineOffset += scanlineStride; |
| } |
| } |
| |
| /** |
| * Sets a sample in the specified band for the pixel located at (x,y) |
| * in the <code>DataBuffer</code> using an int for input. |
| * An <code>ArrayIndexOutOfBoundsException</code> might be thrown if the |
| * coordinates are not in bounds. |
| * @param x The X coordinate of the pixel location |
| * @param y The Y coordinate of the pixel location |
| * @param b the band to set |
| * @param s the input sample as an int |
| * @param data the DataBuffer containing the image data |
| * @see #getSample(int, int, int, DataBuffer) |
| */ |
| public void setSample(int x, int y, int b, int s, |
| DataBuffer data) { |
| // Bounds check for 'b' will be performed automatically |
| if ((x < 0) || (y < 0) || (x >= width) || (y >= height)) { |
| throw new ArrayIndexOutOfBoundsException |
| ("Coordinate out of bounds!"); |
| } |
| data.setElem(bankIndices[b], |
| y*scanlineStride + x*pixelStride + bandOffsets[b], s); |
| } |
| |
| /** |
| * Sets a sample in the specified band for the pixel located at (x,y) |
| * in the <code>DataBuffer</code> using a float for input. |
| * An <code>ArrayIndexOutOfBoundsException</code> might be thrown if |
| * the coordinates are not in bounds. |
| * @param x The X coordinate of the pixel location |
| * @param y The Y coordinate of the pixel location |
| * @param b The band to set |
| * @param s The input sample as a float |
| * @param data The DataBuffer containing the image data |
| * @see #getSample(int, int, int, DataBuffer) |
| */ |
| public void setSample(int x, int y, int b, |
| float s , |
| DataBuffer data) { |
| // Bounds check for 'b' will be performed automatically |
| if ((x < 0) || (y < 0) || (x >= width) || (y >= height)) { |
| throw new ArrayIndexOutOfBoundsException |
| ("Coordinate out of bounds!"); |
| } |
| data.setElemFloat(bankIndices[b], |
| y*scanlineStride + x*pixelStride + bandOffsets[b], |
| s); |
| } |
| |
| /** |
| * Sets a sample in the specified band for the pixel located at (x,y) |
| * in the <code>DataBuffer</code> using a double for input. |
| * An <code>ArrayIndexOutOfBoundsException</code> might be thrown if |
| * the coordinates are not in bounds. |
| * @param x The X coordinate of the pixel location |
| * @param y The Y coordinate of the pixel location |
| * @param b The band to set |
| * @param s The input sample as a double |
| * @param data The DataBuffer containing the image data |
| * @see #getSample(int, int, int, DataBuffer) |
| */ |
| public void setSample(int x, int y, int b, |
| double s, |
| DataBuffer data) { |
| // Bounds check for 'b' will be performed automatically |
| if ((x < 0) || (y < 0) || (x >= width) || (y >= height)) { |
| throw new ArrayIndexOutOfBoundsException |
| ("Coordinate out of bounds!"); |
| } |
| data.setElemDouble(bankIndices[b], |
| y*scanlineStride + x*pixelStride + bandOffsets[b], |
| s); |
| } |
| |
| /** |
| * Sets the samples in the specified band for the specified rectangle |
| * of pixels from an int array containing one sample per data array element. |
| * An <code>ArrayIndexOutOfBoundsException</code> might be thrown if the |
| * coordinates are not in bounds. |
| * @param x The X coordinate of the upper left pixel location |
| * @param y The Y coordinate of the upper left pixel location |
| * @param w The width of the pixel rectangle |
| * @param h The height of the pixel rectangle |
| * @param b The band to set |
| * @param iArray The input samples in an int array |
| * @param data The DataBuffer containing the image data |
| * @see #getSamples(int, int, int, int, int, int[], DataBuffer) |
| */ |
| public void setSamples(int x, int y, int w, int h, int b, |
| int iArray[], DataBuffer data) { |
| // Bounds check for 'b' will be performed automatically |
| if ((x < 0) || (y < 0) || (x + w > width) || (y + h > height)) { |
| throw new ArrayIndexOutOfBoundsException |
| ("Coordinate out of bounds!"); |
| } |
| int lineOffset = y*scanlineStride + x*pixelStride + bandOffsets[b]; |
| int srcOffset = 0; |
| |
| for (int i = 0; i < h; i++) { |
| int sampleOffset = lineOffset; |
| for (int j = 0; j < w; j++) { |
| data.setElem(bankIndices[b], sampleOffset, iArray[srcOffset++]); |
| sampleOffset += pixelStride; |
| } |
| lineOffset += scanlineStride; |
| } |
| } |
| |
| public boolean equals(Object o) { |
| if ((o == null) || !(o instanceof ComponentSampleModel)) { |
| return false; |
| } |
| |
| ComponentSampleModel that = (ComponentSampleModel)o; |
| return this.width == that.width && |
| this.height == that.height && |
| this.numBands == that.numBands && |
| this.dataType == that.dataType && |
| Arrays.equals(this.bandOffsets, that.bandOffsets) && |
| Arrays.equals(this.bankIndices, that.bankIndices) && |
| this.numBands == that.numBands && |
| this.numBanks == that.numBanks && |
| this.scanlineStride == that.scanlineStride && |
| this.pixelStride == that.pixelStride; |
| } |
| |
| // If we implement equals() we must also implement hashCode |
| public int hashCode() { |
| int hash = 0; |
| hash = width; |
| hash <<= 8; |
| hash ^= height; |
| hash <<= 8; |
| hash ^= numBands; |
| hash <<= 8; |
| hash ^= dataType; |
| hash <<= 8; |
| for (int i = 0; i < bandOffsets.length; i++) { |
| hash ^= bandOffsets[i]; |
| hash <<= 8; |
| } |
| for (int i = 0; i < bankIndices.length; i++) { |
| hash ^= bankIndices[i]; |
| hash <<= 8; |
| } |
| hash ^= numBands; |
| hash <<= 8; |
| hash ^= numBanks; |
| hash <<= 8; |
| hash ^= scanlineStride; |
| hash <<= 8; |
| hash ^= pixelStride; |
| return hash; |
| } |
| } |
