JDK8/Java8源码在线阅读
/*
* Copyright (c) 1997, 2013, 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
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/* ****************************************************************
******************************************************************
******************************************************************
*** 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*** As an unpublished work pursuant to Title 17 of the United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.awt.Rectangle;
import java.awt.Point;
import sun.awt.image.ByteInterleavedRaster;
import sun.awt.image.ShortInterleavedRaster;
import sun.awt.image.IntegerInterleavedRaster;
import sun.awt.image.ByteBandedRaster;
import sun.awt.image.ShortBandedRaster;
import sun.awt.image.BytePackedRaster;
import sun.awt.image.SunWritableRaster;
/**
* A class representing a rectangular array of pixels. A Raster
* encapsulates a DataBuffer that stores the sample values and a
* SampleModel that describes how to locate a given sample value in a
* DataBuffer.
* <p>
* A Raster defines values for pixels occupying a particular
* rectangular area of the plane, not necessarily including (0, 0).
* The rectangle, known as the Raster's bounding rectangle and
* available by means of the getBounds method, is defined by minX,
* minY, width, and height values. The minX and minY values define
* the coordinate of the upper left corner of the Raster. References
* to pixels outside of the bounding rectangle may result in an
* exception being thrown, or may result in references to unintended
* elements of the Raster's associated DataBuffer. It is the user's
* responsibility to avoid accessing such pixels.
* <p>
* A SampleModel describes how samples of a Raster
* are stored in the primitive array elements of a DataBuffer.
* Samples may be stored one per data element, as in a
* PixelInterleavedSampleModel or BandedSampleModel, or packed several to
* an element, as in a SinglePixelPackedSampleModel or
* MultiPixelPackedSampleModel. The SampleModel is also
* controls whether samples are sign extended, allowing unsigned
* data to be stored in signed Java data types such as byte, short, and
* int.
* <p>
* Although a Raster may live anywhere in the plane, a SampleModel
* makes use of a simple coordinate system that starts at (0, 0). A
* Raster therefore contains a translation factor that allows pixel
* locations to be mapped between the Raster's coordinate system and
* that of the SampleModel. The translation from the SampleModel
* coordinate system to that of the Raster may be obtained by the
* getSampleModelTranslateX and getSampleModelTranslateY methods.
* <p>
* A Raster may share a DataBuffer with another Raster either by
* explicit construction or by the use of the createChild and
* createTranslatedChild methods. Rasters created by these methods
* can return a reference to the Raster they were created from by
* means of the getParent method. For a Raster that was not
* constructed by means of a call to createTranslatedChild or
* createChild, getParent will return null.
* <p>
* The createTranslatedChild method returns a new Raster that
* shares all of the data of the current Raster, but occupies a
* bounding rectangle of the same width and height but with a
* different starting point. For example, if the parent Raster
* occupied the region (10, 10) to (100, 100), and the translated
* Raster was defined to start at (50, 50), then pixel (20, 20) of the
* parent and pixel (60, 60) of the child occupy the same location in
* the DataBuffer shared by the two Rasters. In the first case, (-10,
* -10) should be added to a pixel coordinate to obtain the
* corresponding SampleModel coordinate, and in the second case (-50,
* -50) should be added.
* <p>
* The translation between a parent and child Raster may be
* determined by subtracting the child's sampleModelTranslateX and
* sampleModelTranslateY values from those of the parent.
* <p>
* The createChild method may be used to create a new Raster
* occupying only a subset of its parent's bounding rectangle
* (with the same or a translated coordinate system) or
* with a subset of the bands of its parent.
* <p>
* All constructors are protected. The correct way to create a
* Raster is to use one of the static create methods defined in this
* class. These methods create instances of Raster that use the
* standard Interleaved, Banded, and Packed SampleModels and that may
* be processed more efficiently than a Raster created by combining
* an externally generated SampleModel and DataBuffer.
* @see java.awt.image.DataBuffer
* @see java.awt.image.SampleModel
* @see java.awt.image.PixelInterleavedSampleModel
* @see java.awt.image.BandedSampleModel
* @see java.awt.image.SinglePixelPackedSampleModel
* @see java.awt.image.MultiPixelPackedSampleModel
*/
public class Raster {
/**
* The SampleModel that describes how pixels from this Raster
* are stored in the DataBuffer.
*/
protected SampleModel sampleModel;
/** The DataBuffer that stores the image data. */
protected DataBuffer dataBuffer;
/** The X coordinate of the upper-left pixel of this Raster. */
protected int minX;
/** The Y coordinate of the upper-left pixel of this Raster. */
protected int minY;
/** The width of this Raster. */
protected int width;
/** The height of this Raster. */
protected int height;
/**
* The X translation from the coordinate space of the
* Raster's SampleModel to that of the Raster.
*/
protected int sampleModelTranslateX;
/**
* The Y translation from the coordinate space of the
* Raster's SampleModel to that of the Raster.
*/
protected int sampleModelTranslateY;
/** The number of bands in the Raster. */
protected int numBands;
/** The number of DataBuffer data elements per pixel. */
protected int numDataElements;
/** The parent of this Raster, or null. */
protected Raster parent;
static private native void initIDs();
static {
ColorModel.loadLibraries();
initIDs();
}
/**
* Creates a Raster based on a PixelInterleavedSampleModel with the
* specified data type, width, height, and number of bands.
*
* <p> The upper left corner of the Raster is given by the
* location argument. If location is null, (0, 0) will be used.
* The dataType parameter should be one of the enumerated values
* defined in the DataBuffer class.
*
* <p> Note that interleaved <code>DataBuffer.TYPE_INT</code>
* Rasters are not supported. To create a 1-band Raster of type
* <code>DataBuffer.TYPE_INT</code>, use
* Raster.createPackedRaster().
* <p> The only dataTypes supported currently are TYPE_BYTE
* and TYPE_USHORT.
* @param dataType the data type for storing samples
* @param w the width in pixels of the image data
* @param h the height in pixels of the image data
* @param bands the number of bands
* @param location the upper-left corner of the <code>Raster</code>
* @return a WritableRaster object with the specified data type,
* width, height and number of bands.
* @throws RasterFormatException if <code>w</code> or <code>h</code>
* is less than or equal to zero, or computing either
* <code>location.x + w</code> or
* <code>location.y + h</code> results in integer
* overflow
*/
public static WritableRaster createInterleavedRaster(int dataType,
int w, int h,
int bands,
Point location) {
int[] bandOffsets = new int[bands];
for (int i = 0; i < bands; i++) {
bandOffsets[i] = i;
}
return createInterleavedRaster(dataType, w, h, w*bands, bands,
bandOffsets, location);
}
/**
* Creates a Raster based on a PixelInterleavedSampleModel with the
* specified data type, width, height, scanline stride, pixel
* stride, and band offsets. The number of bands is inferred from
* bandOffsets.length.
*
* <p> The upper left corner of the Raster is given by the
* location argument. If location is null, (0, 0) will be used.
* The dataType parameter should be one of the enumerated values
* defined in the DataBuffer class.
*
* <p> Note that interleaved <code>DataBuffer.TYPE_INT</code>
* Rasters are not supported. To create a 1-band Raster of type
* <code>DataBuffer.TYPE_INT</code>, use
* Raster.createPackedRaster().
* <p> The only dataTypes supported currently are TYPE_BYTE
* and TYPE_USHORT.
* @param dataType the data type for storing samples
* @param w the width in pixels of the image data
* @param h the height in pixels of the image data
* @param scanlineStride the line stride of the image data
* @param pixelStride the pixel stride of the image data
* @param bandOffsets the offsets of all bands
* @param location the upper-left corner of the <code>Raster</code>
* @return a WritableRaster object with the specified data type,
* width, height, scanline stride, pixel stride and band
* offsets.
* @throws RasterFormatException if <code>w</code> or <code>h</code>
* is less than or equal to zero, or computing either
* <code>location.x + w</code> or
* <code>location.y + h</code> results in integer
* overflow
* @throws IllegalArgumentException if <code>dataType</code> is not
* one of the supported data types, which are
* <code>DataBuffer.TYPE_BYTE</code>, or
* <code>DataBuffer.TYPE_USHORT</code>.
*/
public static WritableRaster createInterleavedRaster(int dataType,
int w, int h,
int scanlineStride,
int pixelStride,
int bandOffsets[],
Point location) {
DataBuffer d;
int size = scanlineStride * (h - 1) + // fisrt (h - 1) scans
pixelStride * w; // last scan
switch(dataType) {
case DataBuffer.TYPE_BYTE:
d = new DataBufferByte(size);
break;
case DataBuffer.TYPE_USHORT:
d = new DataBufferUShort(size);
break;
default:
throw new IllegalArgumentException("Unsupported data type " +
dataType);
}
return createInterleavedRaster(d, w, h, scanlineStride,
pixelStride, bandOffsets, location);
}
/**
* Creates a Raster based on a BandedSampleModel with the
* specified data type, width, height, and number of bands.
*
* <p> The upper left corner of the Raster is given by the
* location argument. If location is null, (0, 0) will be used.
* The dataType parameter should be one of the enumerated values
* defined in the DataBuffer class.
*
* <p> The only dataTypes supported currently are TYPE_BYTE, TYPE_USHORT,
* and TYPE_INT.
* @param dataType the data type for storing samples
* @param w the width in pixels of the image data
* @param h the height in pixels of the image data
* @param bands the number of bands
* @param location the upper-left corner of the <code>Raster</code>
* @return a WritableRaster object with the specified data type,
* width, height and number of bands.
* @throws RasterFormatException if <code>w</code> or <code>h</code>
* is less than or equal to zero, or computing either
* <code>location.x + w</code> or
* <code>location.y + h</code> results in integer
* overflow
* @throws ArrayIndexOutOfBoundsException if <code>bands</code>
* is less than 1
*/
public static WritableRaster createBandedRaster(int dataType,
int w, int h,
int bands,
Point location) {
if (bands < 1) {
throw new ArrayIndexOutOfBoundsException("Number of bands ("+
bands+") must"+
" be greater than 0");
}
int[] bankIndices = new int[bands];
int[] bandOffsets = new int[bands];
for (int i = 0; i < bands; i++) {
bankIndices[i] = i;
bandOffsets[i] = 0;
}
return createBandedRaster(dataType, w, h, w,
bankIndices, bandOffsets,
location);
}
/**
* Creates a Raster based on a BandedSampleModel with the
* specified data type, width, height, scanline stride, bank
* indices and band offsets. The number of bands is inferred from
* bankIndices.length and bandOffsets.length, which must be the
* same.
*
* <p> The upper left corner of the Raster is given by the
* location argument. The dataType parameter should be one of the
* enumerated values defined in the DataBuffer class.
*
* <p> The only dataTypes supported currently are TYPE_BYTE, TYPE_USHORT,
* and TYPE_INT.
* @param dataType the data type for storing samples
* @param w the width in pixels of the image data
* @param h the height in pixels of the image data
* @param scanlineStride the line stride of the image data
* @param bankIndices the bank indices for each band
* @param bandOffsets the offsets of all bands
* @param location the upper-left corner of the <code>Raster</code>
* @return a WritableRaster object with the specified data type,
* width, height, scanline stride, bank indices and band
* offsets.
* @throws RasterFormatException if <code>w</code> or <code>h</code>
* is less than or equal to zero, or computing either
* <code>location.x + w</code> or
* <code>location.y + h</code> results in integer
* overflow
* @throws IllegalArgumentException if <code>dataType</code> is not
* one of the supported data types, which are
* <code>DataBuffer.TYPE_BYTE</code>,
* <code>DataBuffer.TYPE_USHORT</code>
* or <code>DataBuffer.TYPE_INT</code>
* @throws ArrayIndexOutOfBoundsException if <code>bankIndices</code>
* or <code>bandOffsets</code> is <code>null</code>
*/
public static WritableRaster createBandedRaster(int dataType,
int w, int h,
int scanlineStride,
int bankIndices[],
int bandOffsets[],
Point location) {
DataBuffer d;
int bands = bandOffsets.length;
if (bankIndices == null) {
throw new
ArrayIndexOutOfBoundsException("Bank indices array is null");
}
if (bandOffsets == null) {
throw new
ArrayIndexOutOfBoundsException("Band offsets array is null");
}
// Figure out the #banks and the largest band offset
int maxBank = bankIndices[0];
int maxBandOff = bandOffsets[0];
for (int i = 1; i < bands; i++) {
if (bankIndices[i] > maxBank) {
maxBank = bankIndices[i];
}
if (bandOffsets[i] > maxBandOff) {
maxBandOff = bandOffsets[i];
}
}
int banks = maxBank + 1;
int size = maxBandOff +
scanlineStride * (h - 1) + // fisrt (h - 1) scans
w; // last scan
switch(dataType) {
case DataBuffer.TYPE_BYTE:
d = new DataBufferByte(size, banks);
break;
case DataBuffer.TYPE_USHORT:
d = new DataBufferUShort(size, banks);
break;
case DataBuffer.TYPE_INT:
d = new DataBufferInt(size, banks);
break;
default:
throw new IllegalArgumentException("Unsupported data type " +
dataType);
}
return createBandedRaster(d, w, h, scanlineStride,
bankIndices, bandOffsets, location);
}
/**
* Creates a Raster based on a SinglePixelPackedSampleModel with
* the specified data type, width, height, and band masks.
* The number of bands is inferred from bandMasks.length.
*
* <p> The upper left corner of the Raster is given by the
* location argument. If location is null, (0, 0) will be used.
* The dataType parameter should be one of the enumerated values
* defined in the DataBuffer class.
*
* <p> The only dataTypes supported currently are TYPE_BYTE, TYPE_USHORT,
* and TYPE_INT.
* @param dataType the data type for storing samples
* @param w the width in pixels of the image data
* @param h the height in pixels of the image data
* @param bandMasks an array containing an entry for each band
* @param location the upper-left corner of the <code>Raster</code>
* @return a WritableRaster object with the specified data type,
* width, height, and band masks.
* @throws RasterFormatException if <code>w</code> or <code>h</code>
* is less than or equal to zero, or computing either
* <code>location.x + w</code> or
* <code>location.y + h</code> results in integer
* overflow
* @throws IllegalArgumentException if <code>dataType</code> is not
* one of the supported data types, which are
* <code>DataBuffer.TYPE_BYTE</code>,
* <code>DataBuffer.TYPE_USHORT</code>
* or <code>DataBuffer.TYPE_INT</code>
*/
public static WritableRaster createPackedRaster(int dataType,
int w, int h,
int bandMasks[],
Point location) {
DataBuffer d;
switch(dataType) {
case DataBuffer.TYPE_BYTE:
d = new DataBufferByte(w*h);
break;
case DataBuffer.TYPE_USHORT:
d = new DataBufferUShort(w*h);
break;
case DataBuffer.TYPE_INT:
d = new DataBufferInt(w*h);
break;
default:
throw new IllegalArgumentException("Unsupported data type " +
dataType);
}
return createPackedRaster(d, w, h, w, bandMasks, location);
}
/**
* Creates a Raster based on a packed SampleModel with the
* specified data type, width, height, number of bands, and bits
* per band. If the number of bands is one, the SampleModel will
* be a MultiPixelPackedSampleModel.
*
* <p> If the number of bands is more than one, the SampleModel
* will be a SinglePixelPackedSampleModel, with each band having
* bitsPerBand bits. In either case, the requirements on dataType
* and bitsPerBand imposed by the corresponding SampleModel must
* be met.
*
* <p> The upper left corner of the Raster is given by the
* location argument. If location is null, (0, 0) will be used.
* The dataType parameter should be one of the enumerated values
* defined in the DataBuffer class.
*
* <p> The only dataTypes supported currently are TYPE_BYTE, TYPE_USHORT,
* and TYPE_INT.
* @param dataType the data type for storing samples
* @param w the width in pixels of the image data
* @param h the height in pixels of the image data
* @param bands the number of bands
* @param bitsPerBand the number of bits per band
* @param location the upper-left corner of the <code>Raster</code>
* @return a WritableRaster object with the specified data type,
* width, height, number of bands, and bits per band.
* @throws RasterFormatException if <code>w</code> or <code>h</code>
* is less than or equal to zero, or computing either
* <code>location.x + w</code> or
* <code>location.y + h</code> results in integer
* overflow
* @throws IllegalArgumentException if the product of
* <code>bitsPerBand</code> and <code>bands</code> is
* greater than the number of bits held by
* <code>dataType</code>
* @throws IllegalArgumentException if <code>bitsPerBand</code> or
* <code>bands</code> is not greater than zero
* @throws IllegalArgumentException if <code>dataType</code> is not
* one of the supported data types, which are
* <code>DataBuffer.TYPE_BYTE</code>,
* <code>DataBuffer.TYPE_USHORT</code>
* or <code>DataBuffer.TYPE_INT</code>
*/
public static WritableRaster createPackedRaster(int dataType,
int w, int h,
int bands,
int bitsPerBand,
Point location) {
DataBuffer d;
if (bands <= 0) {
throw new IllegalArgumentException("Number of bands ("+bands+
") must be greater than 0");
}
if (bitsPerBand <= 0) {
throw new IllegalArgumentException("Bits per band ("+bitsPerBand+
") must be greater than 0");
}
if (bands != 1) {
int[] masks = new int[bands];
int mask = (1 << bitsPerBand) - 1;
int shift = (bands-1)*bitsPerBand;
/* Make sure the total mask size will fit in the data type */
if (shift+bitsPerBand > DataBuffer.getDataTypeSize(dataType)) {
throw new IllegalArgumentException("bitsPerBand("+
bitsPerBand+") * bands is "+
" greater than data type "+
"size.");
}
switch(dataType) {
case DataBuffer.TYPE_BYTE:
case DataBuffer.TYPE_USHORT:
case DataBuffer.TYPE_INT:
break;
default:
throw new IllegalArgumentException("Unsupported data type " +
dataType);
}
for (int i = 0; i < bands; i++) {
masks[i] = mask << shift;
shift = shift - bitsPerBand;
}
return createPackedRaster(dataType, w, h, masks, location);
}
else {
double fw = w;
switch(dataType) {
case DataBuffer.TYPE_BYTE:
d = new DataBufferByte((int)(Math.ceil(fw/(8/bitsPerBand)))*h);
break;
case DataBuffer.TYPE_USHORT:
d = new DataBufferUShort((int)(Math.ceil(fw/(16/bitsPerBand)))*h);
break;
case DataBuffer.TYPE_INT:
d = new DataBufferInt((int)(Math.ceil(fw/(32/bitsPerBand)))*h);
break;
default:
throw new IllegalArgumentException("Unsupported data type " +
dataType);
}
return createPackedRaster(d, w, h, bitsPerBand, location);
}
}
/**
* Creates a Raster based on a PixelInterleavedSampleModel with the
* specified DataBuffer, width, height, scanline stride, pixel
* stride, and band offsets. The number of bands is inferred from
* bandOffsets.length. The upper left corner of the Raster
* is given by the location argument. If location is null, (0, 0)
* will be used.
* <p> Note that interleaved <code>DataBuffer.TYPE_INT</code>
* Rasters are not supported. To create a 1-band Raster of type
* <code>DataBuffer.TYPE_INT</code>, use
* Raster.createPackedRaster().
* @param dataBuffer the <code>DataBuffer</code> that contains the
* image data
* @param w the width in pixels of the image data
* @param h the height in pixels of the image data
* @param scanlineStride the line stride of the image data
* @param pixelStride the pixel stride of the image data
* @param bandOffsets the offsets of all bands
* @param location the upper-left corner of the <code>Raster</code>
* @return a WritableRaster object with the specified
* <code>DataBuffer</code>, width, height, scanline stride,
* pixel stride and band offsets.
* @throws RasterFormatException if <code>w</code> or <code>h</code>
* is less than or equal to zero, or computing either
* <code>location.x + w</code> or
* <code>location.y + h</code> results in integer
* overflow
* @throws IllegalArgumentException if <code>dataType</code> is not
* one of the supported data types, which are
* <code>DataBuffer.TYPE_BYTE</code>,
* <code>DataBuffer.TYPE_USHORT</code>
* @throws RasterFormatException if <code>dataBuffer</code> has more
* than one bank.
* @throws NullPointerException if <code>dataBuffer</code> is null
*/
public static WritableRaster createInterleavedRaster(DataBuffer dataBuffer,
int w, int h,
int scanlineStride,
int pixelStride,
int bandOffsets[],
Point location) {
if (dataBuffer == null) {
throw new NullPointerException("DataBuffer cannot be null");
}
if (location == null) {
location = new Point(0, 0);
}
int dataType = dataBuffer.getDataType();
PixelInterleavedSampleModel csm =
new PixelInterleavedSampleModel(dataType, w, h,
pixelStride,
scanlineStride,
bandOffsets);
switch(dataType) {
case DataBuffer.TYPE_BYTE:
return new ByteInterleavedRaster(csm, dataBuffer, location);
case DataBuffer.TYPE_USHORT:
return new ShortInterleavedRaster(csm, dataBuffer, location);
default:
throw new IllegalArgumentException("Unsupported data type " +
dataType);
}
}
/**
* Creates a Raster based on a BandedSampleModel with the
* specified DataBuffer, width, height, scanline stride, bank
* indices, and band offsets. The number of bands is inferred
* from bankIndices.length and bandOffsets.length, which must be
* the same. The upper left corner of the Raster is given by the
* location argument. If location is null, (0, 0) will be used.
* @param dataBuffer the <code>DataBuffer</code> that contains the
* image data
* @param w the width in pixels of the image data
* @param h the height in pixels of the image data
* @param scanlineStride the line stride of the image data
* @param bankIndices the bank indices for each band
* @param bandOffsets the offsets of all bands
* @param location the upper-left corner of the <code>Raster</code>
* @return a WritableRaster object with the specified
* <code>DataBuffer</code>, width, height, scanline stride,
* bank indices and band offsets.
* @throws RasterFormatException if <code>w</code> or <code>h</code>
* is less than or equal to zero, or computing either
* <code>location.x + w</code> or
* <code>location.y + h</code> results in integer
* overflow
* @throws IllegalArgumentException if <code>dataType</code> is not
* one of the supported data types, which are
* <code>DataBuffer.TYPE_BYTE</code>,
* <code>DataBuffer.TYPE_USHORT</code>
* or <code>DataBuffer.TYPE_INT</code>
* @throws NullPointerException if <code>dataBuffer</code> is null
*/
public static WritableRaster createBandedRaster(DataBuffer dataBuffer,
int w, int h,
int scanlineStride,
int bankIndices[],
int bandOffsets[],
Point location) {
if (dataBuffer == null) {
throw new NullPointerException("DataBuffer cannot be null");
}
if (location == null) {
location = new Point(0,0);
}
int dataType = dataBuffer.getDataType();
int bands = bankIndices.length;
if (bandOffsets.length != bands) {
throw new IllegalArgumentException(
"bankIndices.length != bandOffsets.length");
}
BandedSampleModel bsm =
new BandedSampleModel(dataType, w, h,
scanlineStride,
bankIndices, bandOffsets);
switch(dataType) {
case DataBuffer.TYPE_BYTE:
return new ByteBandedRaster(bsm, dataBuffer, location);
case DataBuffer.TYPE_USHORT:
return new ShortBandedRaster(bsm, dataBuffer, location);
case DataBuffer.TYPE_INT:
return new SunWritableRaster(bsm, dataBuffer, location);
default:
throw new IllegalArgumentException("Unsupported data type " +
dataType);
}
}
/**
* Creates a Raster based on a SinglePixelPackedSampleModel with
* the specified DataBuffer, width, height, scanline stride, and
* band masks. The number of bands is inferred from bandMasks.length.
* The upper left corner of the Raster is given by
* the location argument. If location is null, (0, 0) will be used.
* @param dataBuffer the <code>DataBuffer</code> that contains the
* image data
* @param w the width in pixels of the image data
* @param h the height in pixels of the image data
* @param scanlineStride the line stride of the image data
* @param bandMasks an array containing an entry for each band
* @param location the upper-left corner of the <code>Raster</code>
* @return a WritableRaster object with the specified
* <code>DataBuffer</code>, width, height, scanline stride,
* and band masks.
* @throws RasterFormatException if <code>w</code> or <code>h</code>
* is less than or equal to zero, or computing either
* <code>location.x + w</code> or
* <code>location.y + h</code> results in integer
* overflow
* @throws IllegalArgumentException if <code>dataType</code> is not
* one of the supported data types, which are
* <code>DataBuffer.TYPE_BYTE</code>,
* <code>DataBuffer.TYPE_USHORT</code>
* or <code>DataBuffer.TYPE_INT</code>
* @throws RasterFormatException if <code>dataBuffer</code> has more
* than one bank.
* @throws NullPointerException if <code>dataBuffer</code> is null
*/
public static WritableRaster createPackedRaster(DataBuffer dataBuffer,
int w, int h,
int scanlineStride,
int bandMasks[],
Point location) {
if (dataBuffer == null) {
throw new NullPointerException("DataBuffer cannot be null");
}
if (location == null) {
location = new Point(0,0);
}
int dataType = dataBuffer.getDataType();
SinglePixelPackedSampleModel sppsm =
new SinglePixelPackedSampleModel(dataType, w, h, scanlineStride,
bandMasks);
switch(dataType) {
case DataBuffer.TYPE_BYTE:
return new ByteInterleavedRaster(sppsm, dataBuffer, location);
case DataBuffer.TYPE_USHORT:
return new ShortInterleavedRaster(sppsm, dataBuffer, location);
case DataBuffer.TYPE_INT:
return new IntegerInterleavedRaster(sppsm, dataBuffer, location);
default:
throw new IllegalArgumentException("Unsupported data type " +
dataType);
}
}
/**
* Creates a Raster based on a MultiPixelPackedSampleModel with the
* specified DataBuffer, width, height, and bits per pixel. The upper
* left corner of the Raster is given by the location argument. If
* location is null, (0, 0) will be used.
* @param dataBuffer the <code>DataBuffer</code> that contains the
* image data
* @param w the width in pixels of the image data
* @param h the height in pixels of the image data
* @param bitsPerPixel the number of bits for each pixel
* @param location the upper-left corner of the <code>Raster</code>
* @return a WritableRaster object with the specified
* <code>DataBuffer</code>, width, height, and
* bits per pixel.
* @throws RasterFormatException if <code>w</code> or <code>h</code>
* is less than or equal to zero, or computing either
* <code>location.x + w</code> or
* <code>location.y + h</code> results in integer
* overflow
* @throws IllegalArgumentException if <code>dataType</code> is not
* one of the supported data types, which are
* <code>DataBuffer.TYPE_BYTE</code>,
* <code>DataBuffer.TYPE_USHORT</code>
* or <code>DataBuffer.TYPE_INT</code>
* @throws RasterFormatException if <code>dataBuffer</code> has more
* than one bank.
* @throws NullPointerException if <code>dataBuffer</code> is null
*/
public static WritableRaster createPackedRaster(DataBuffer dataBuffer,
int w, int h,
int bitsPerPixel,
Point location) {
if (dataBuffer == null) {
throw new NullPointerException("DataBuffer cannot be null");
}
if (location == null) {
location = new Point(0,0);
}
int dataType = dataBuffer.getDataType();
if (dataType != DataBuffer.TYPE_BYTE &&
dataType != DataBuffer.TYPE_USHORT &&
dataType != DataBuffer.TYPE_INT) {
throw new IllegalArgumentException("Unsupported data type " +
dataType);
}
if (dataBuffer.getNumBanks() != 1) {
throw new
RasterFormatException("DataBuffer for packed Rasters"+
" must only have 1 bank.");
}
MultiPixelPackedSampleModel mppsm =
new MultiPixelPackedSampleModel(dataType, w, h, bitsPerPixel);
if (dataType == DataBuffer.TYPE_BYTE &&
(bitsPerPixel == 1 || bitsPerPixel == 2 || bitsPerPixel == 4)) {
return new BytePackedRaster(mppsm, dataBuffer, location);
} else {
return new SunWritableRaster(mppsm, dataBuffer, location);
}
}
/**
* Creates a Raster with the specified SampleModel and DataBuffer.
* The upper left corner of the Raster is given by the location argument.
* If location is null, (0, 0) will be used.
* @param sm the specified <code>SampleModel</code>
* @param db the specified <code>DataBuffer</code>
* @param location the upper-left corner of the <code>Raster</code>
* @return a <code>Raster</code> with the specified
* <code>SampleModel</code>, <code>DataBuffer</code>, and
* location.
* @throws RasterFormatException if computing either
* <code>location.x + sm.getWidth()</code> or
* <code>location.y + sm.getHeight()</code> results in integer
* overflow
* @throws RasterFormatException if <code>db</code> has more
* than one bank and <code>sm</code> is a
* PixelInterleavedSampleModel, SinglePixelPackedSampleModel,
* or MultiPixelPackedSampleModel.
* @throws NullPointerException if either SampleModel or DataBuffer is
* null
*/
public static Raster createRaster(SampleModel sm,
DataBuffer db,
Point location) {
if ((sm == null) || (db == null)) {
throw new NullPointerException("SampleModel and DataBuffer cannot be null");
}
if (location == null) {
location = new Point(0,0);
}
int dataType = sm.getDataType();
if (sm instanceof PixelInterleavedSampleModel) {
switch(dataType) {
case DataBuffer.TYPE_BYTE:
return new ByteInterleavedRaster(sm, db, location);
case DataBuffer.TYPE_USHORT:
return new ShortInterleavedRaster(sm, db, location);
}
} else if (sm instanceof SinglePixelPackedSampleModel) {
switch(dataType) {
case DataBuffer.TYPE_BYTE:
return new ByteInterleavedRaster(sm, db, location);
case DataBuffer.TYPE_USHORT:
return new ShortInterleavedRaster(sm, db, location);
case DataBuffer.TYPE_INT:
return new IntegerInterleavedRaster(sm, db, location);
}
} else if (sm instanceof MultiPixelPackedSampleModel &&
dataType == DataBuffer.TYPE_BYTE &&
sm.getSampleSize(0) < 8) {
return new BytePackedRaster(sm, db, location);
}
// we couldn't do anything special - do the generic thing
return new Raster(sm,db,location);
}
/**
* Creates a WritableRaster with the specified SampleModel.
* The upper left corner of the Raster is given by the location argument.
* If location is null, (0, 0) will be used.
* @param sm the specified <code>SampleModel</code>
* @param location the upper-left corner of the
* <code>WritableRaster</code>
* @return a <code>WritableRaster</code> with the specified
* <code>SampleModel</code> and location.
* @throws RasterFormatException if computing either
* <code>location.x + sm.getWidth()</code> or
* <code>location.y + sm.getHeight()</code> results in integer
* overflow
*/
public static WritableRaster createWritableRaster(SampleModel sm,
Point location) {
if (location == null) {
location = new Point(0,0);
}
return createWritableRaster(sm, sm.createDataBuffer(), location);
}
/**
* Creates a WritableRaster with the specified SampleModel and DataBuffer.
* The upper left corner of the Raster is given by the location argument.
* If location is null, (0, 0) will be used.
* @param sm the specified <code>SampleModel</code>
* @param db the specified <code>DataBuffer</code>
* @param location the upper-left corner of the
* <code>WritableRaster</code>
* @return a <code>WritableRaster</code> with the specified
* <code>SampleModel</code>, <code>DataBuffer</code>, and
* location.
* @throws RasterFormatException if computing either
* <code>location.x + sm.getWidth()</code> or
* <code>location.y + sm.getHeight()</code> results in integer
* overflow
* @throws RasterFormatException if <code>db</code> has more
* than one bank and <code>sm</code> is a
* PixelInterleavedSampleModel, SinglePixelPackedSampleModel,
* or MultiPixelPackedSampleModel.
* @throws NullPointerException if either SampleModel or DataBuffer is null
*/
public static WritableRaster createWritableRaster(SampleModel sm,
DataBuffer db,
Point location) {
if ((sm == null) || (db == null)) {
throw new NullPointerException("SampleModel and DataBuffer cannot be null");
}
if (location == null) {
location = new Point(0,0);
}
int dataType = sm.getDataType();
if (sm instanceof PixelInterleavedSampleModel) {
switch(dataType) {
case DataBuffer.TYPE_BYTE:
return new ByteInterleavedRaster(sm, db, location);
case DataBuffer.TYPE_USHORT:
return new ShortInterleavedRaster(sm, db, location);
}
} else if (sm instanceof SinglePixelPackedSampleModel) {
switch(dataType) {
case DataBuffer.TYPE_BYTE:
return new ByteInterleavedRaster(sm, db, location);
case DataBuffer.TYPE_USHORT:
return new ShortInterleavedRaster(sm, db, location);
case DataBuffer.TYPE_INT:
return new IntegerInterleavedRaster(sm, db, location);
}
} else if (sm instanceof MultiPixelPackedSampleModel &&
dataType == DataBuffer.TYPE_BYTE &&
sm.getSampleSize(0) < 8) {
return new BytePackedRaster(sm, db, location);
}
// we couldn't do anything special - do the generic thing
return new SunWritableRaster(sm,db,location);
}
/**
* Constructs a Raster with the given SampleModel. The Raster's
* upper left corner is origin and it is the same size as the
* SampleModel. A DataBuffer large enough to describe the
* Raster is automatically created.
* @param sampleModel The SampleModel that specifies the layout
* @param origin The Point that specified the origin
* @throws RasterFormatException if computing either
* <code>origin.x + sampleModel.getWidth()</code> or
* <code>origin.y + sampleModel.getHeight()</code> results in
* integer overflow
* @throws NullPointerException either <code>sampleModel</code> or
* <code>origin</code> is null
*/
protected Raster(SampleModel sampleModel,
Point origin) {
this(sampleModel,
sampleModel.createDataBuffer(),
new Rectangle(origin.x,
origin.y,
sampleModel.getWidth(),
sampleModel.getHeight()),
origin,
null);
}
/**
* Constructs a Raster with the given SampleModel and DataBuffer.
* The Raster's upper left corner is origin and it is the same size
* as the SampleModel. The DataBuffer is not initialized and must
* be compatible with SampleModel.
* @param sampleModel The SampleModel that specifies the layout
* @param dataBuffer The DataBuffer that contains the image data
* @param origin The Point that specifies the origin
* @throws RasterFormatException if computing either
* <code>origin.x + sampleModel.getWidth()</code> or
* <code>origin.y + sampleModel.getHeight()</code> results in
* integer overflow
* @throws NullPointerException either <code>sampleModel</code> or
* <code>origin</code> is null
*/
protected Raster(SampleModel sampleModel,
DataBuffer dataBuffer,
Point origin) {
this(sampleModel,
dataBuffer,
new Rectangle(origin.x,
origin.y,
sampleModel.getWidth(),
sampleModel.getHeight()),
origin,
null);
}
/**
* Constructs a Raster with the given SampleModel, DataBuffer, and
* parent. aRegion specifies the bounding rectangle of the new
* Raster. When translated into the base Raster's coordinate
* system, aRegion must be contained by the base Raster.
* (The base Raster is the Raster's ancestor which has no parent.)
* sampleModelTranslate specifies the sampleModelTranslateX and
* sampleModelTranslateY values of the new Raster.
*
* Note that this constructor should generally be called by other
* constructors or create methods, it should not be used directly.
* @param sampleModel The SampleModel that specifies the layout
* @param dataBuffer The DataBuffer that contains the image data
* @param aRegion The Rectangle that specifies the image area
* @param sampleModelTranslate The Point that specifies the translation
* from SampleModel to Raster coordinates
* @param parent The parent (if any) of this raster
* @throws NullPointerException if any of <code>sampleModel</code>,
* <code>dataBuffer</code>, <code>aRegion</code> or
* <code>sampleModelTranslate</code> is null
* @throws RasterFormatException if <code>aRegion</code> has width
* or height less than or equal to zero, or computing either
* <code>aRegion.x + aRegion.width</code> or
* <code>aRegion.y + aRegion.height</code> results in integer
* overflow
*/
protected Raster(SampleModel sampleModel,
DataBuffer dataBuffer,
Rectangle aRegion,
Point sampleModelTranslate,
Raster parent) {
if ((sampleModel == null) || (dataBuffer == null) ||
(aRegion == null) || (sampleModelTranslate == null)) {
throw new NullPointerException("SampleModel, dataBuffer, aRegion and " +
"sampleModelTranslate cannot be null");
}
this.sampleModel = sampleModel;
this.dataBuffer = dataBuffer;
minX = aRegion.x;
minY = aRegion.y;
width = aRegion.width;
height = aRegion.height;
if (width <= 0 || height <= 0) {
throw new RasterFormatException("negative or zero " +
((width <= 0) ? "width" : "height"));
}
if ((minX + width) < minX) {
throw new RasterFormatException(
"overflow condition for X coordinates of Raster");
}
if ((minY + height) < minY) {
throw new RasterFormatException(
"overflow condition for Y coordinates of Raster");
}
sampleModelTranslateX = sampleModelTranslate.x;
sampleModelTranslateY = sampleModelTranslate.y;
numBands = sampleModel.getNumBands();
numDataElements = sampleModel.getNumDataElements();
this.parent = parent;
}
/**
* Returns the parent Raster (if any) of this Raster or null.
* @return the parent Raster or <code>null</code>.
*/
public Raster getParent() {
return parent;
}
/**
* Returns the X translation from the coordinate system of the
* SampleModel to that of the Raster. To convert a pixel's X
* coordinate from the Raster coordinate system to the SampleModel
* coordinate system, this value must be subtracted.
* @return the X translation from the coordinate space of the
* Raster's SampleModel to that of the Raster.
*/
final public int getSampleModelTranslateX() {
return sampleModelTranslateX;
}
/**
* Returns the Y translation from the coordinate system of the
* SampleModel to that of the Raster. To convert a pixel's Y
* coordinate from the Raster coordinate system to the SampleModel
* coordinate system, this value must be subtracted.
* @return the Y translation from the coordinate space of the
* Raster's SampleModel to that of the Raster.
*/
final public int getSampleModelTranslateY() {
return sampleModelTranslateY;
}
/**
* Create a compatible WritableRaster the same size as this Raster with
* the same SampleModel and a new initialized DataBuffer.
* @return a compatible <code>WritableRaster</code> with the same sample
* model and a new data buffer.
*/
public WritableRaster createCompatibleWritableRaster() {
return new SunWritableRaster(sampleModel, new Point(0,0));
}
/**
* Create a compatible WritableRaster with the specified size, a new
* SampleModel, and a new initialized DataBuffer.
* @param w the specified width of the new <code>WritableRaster</code>
* @param h the specified height of the new <code>WritableRaster</code>
* @return a compatible <code>WritableRaster</code> with the specified
* size and a new sample model and data buffer.
* @exception RasterFormatException if the width or height is less than
* or equal to zero.
*/
public WritableRaster createCompatibleWritableRaster(int w, int h) {
if (w <= 0 || h <=0) {
throw new RasterFormatException("negative " +
((w <= 0) ? "width" : "height"));
}
SampleModel sm = sampleModel.createCompatibleSampleModel(w,h);
return new SunWritableRaster(sm, new Point(0,0));
}
/**
* Create a compatible WritableRaster with location (minX, minY)
* and size (width, height) specified by rect, a
* new SampleModel, and a new initialized DataBuffer.
* @param rect a <code>Rectangle</code> that specifies the size and
* location of the <code>WritableRaster</code>
* @return a compatible <code>WritableRaster</code> with the specified
* size and location and a new sample model and data buffer.
* @throws RasterFormatException if <code>rect</code> has width
* or height less than or equal to zero, or computing either
* <code>rect.x + rect.width</code> or
* <code>rect.y + rect.height</code> results in integer
* overflow
* @throws NullPointerException if <code>rect</code> is null
*/
public WritableRaster createCompatibleWritableRaster(Rectangle rect) {
if (rect == null) {
throw new NullPointerException("Rect cannot be null");
}
return createCompatibleWritableRaster(rect.x, rect.y,
rect.width, rect.height);
}
/**
* Create a compatible WritableRaster with the specified
* location (minX, minY) and size (width, height), a
* new SampleModel, and a new initialized DataBuffer.
* @param x the X coordinate of the upper-left corner of
* the <code>WritableRaster</code>
* @param y the Y coordinate of the upper-left corner of
* the <code>WritableRaster</code>
* @param w the specified width of the <code>WritableRaster</code>
* @param h the specified height of the <code>WritableRaster</code>
* @return a compatible <code>WritableRaster</code> with the specified
* size and location and a new sample model and data buffer.
* @throws RasterFormatException if <code>w</code> or <code>h</code>
* is less than or equal to zero, or computing either
* <code>x + w</code> or
* <code>y + h</code> results in integer
* overflow
*/
public WritableRaster createCompatibleWritableRaster(int x, int y,
int w, int h) {
WritableRaster ret = createCompatibleWritableRaster(w, h);
return ret.createWritableChild(0,0,w,h,x,y,null);
}
/**
* Create a Raster with the same size, SampleModel and DataBuffer
* as this one, but with a different location. The new Raster
* will possess a reference to the current Raster, accessible
* through its getParent() method.
*
* @param childMinX the X coordinate of the upper-left
* corner of the new <code>Raster</code>
* @param childMinY the Y coordinate of the upper-left
* corner of the new <code>Raster</code>
* @return a new <code>Raster</code> with the same size, SampleModel,
* and DataBuffer as this <code>Raster</code>, but with the
* specified location.
* @throws RasterFormatException if computing either
* <code>childMinX + this.getWidth()</code> or
* <code>childMinY + this.getHeight()</code> results in integer
* overflow
*/
public Raster createTranslatedChild(int childMinX, int childMinY) {
return createChild(minX,minY,width,height,
childMinX,childMinY,null);
}
/**
* Returns a new Raster which shares all or part of this Raster's
* DataBuffer. The new Raster will possess a reference to the
* current Raster, accessible through its getParent() method.
*
* <p> The parentX, parentY, width and height parameters
* form a Rectangle in this Raster's coordinate space,
* indicating the area of pixels to be shared. An error will
* be thrown if this Rectangle is not contained with the bounds
* of the current Raster.
*
* <p> The new Raster may additionally be translated to a
* different coordinate system for the plane than that used by the current
* Raster. The childMinX and childMinY parameters give the new
* (x, y) coordinate of the upper-left pixel of the returned
* Raster; the coordinate (childMinX, childMinY) in the new Raster
* will map to the same pixel as the coordinate (parentX, parentY)
* in the current Raster.
*
* <p> The new Raster may be defined to contain only a subset of
* the bands of the current Raster, possibly reordered, by means
* of the bandList parameter. If bandList is null, it is taken to
* include all of the bands of the current Raster in their current
* order.
*
* <p> To create a new Raster that contains a subregion of the current
* Raster, but shares its coordinate system and bands,
* this method should be called with childMinX equal to parentX,
* childMinY equal to parentY, and bandList equal to null.
*
* @param parentX The X coordinate of the upper-left corner
* in this Raster's coordinates
* @param parentY The Y coordinate of the upper-left corner
* in this Raster's coordinates
* @param width Width of the region starting at (parentX, parentY)
* @param height Height of the region starting at (parentX, parentY).
* @param childMinX The X coordinate of the upper-left corner
* of the returned Raster
* @param childMinY The Y coordinate of the upper-left corner
* of the returned Raster
* @param bandList Array of band indices, or null to use all bands
* @return a new <code>Raster</code>.
* @exception RasterFormatException if the specified subregion is outside
* of the raster bounds.
* @throws RasterFormatException if <code>width</code> or
* <code>height</code>
* is less than or equal to zero, or computing any of
* <code>parentX + width</code>, <code>parentY + height</code>,
* <code>childMinX + width</code>, or
* <code>childMinY + height</code> results in integer
* overflow
*/
public Raster createChild(int parentX, int parentY,
int width, int height,
int childMinX, int childMinY,
int bandList[]) {
if (parentX < this.minX) {
throw new RasterFormatException("parentX lies outside raster");
}
if (parentY < this.minY) {
throw new RasterFormatException("parentY lies outside raster");
}
if ((parentX + width < parentX) ||
(parentX + width > this.width + this.minX)) {
throw new RasterFormatException("(parentX + width) is outside raster");
}
if ((parentY + height < parentY) ||
(parentY + height > this.height + this.minY)) {
throw new RasterFormatException("(parentY + height) is outside raster");
}
SampleModel subSampleModel;
// Note: the SampleModel for the child Raster should have the same
// width and height as that for the parent, since it represents
// the physical layout of the pixel data. The child Raster's width
// and height represent a "virtual" view of the pixel data, so
// they may be different than those of the SampleModel.
if (bandList == null) {
subSampleModel = sampleModel;
} else {
subSampleModel = sampleModel.createSubsetSampleModel(bandList);
}
int deltaX = childMinX - parentX;
int deltaY = childMinY - parentY;
return new Raster(subSampleModel, getDataBuffer(),
new Rectangle(childMinX, childMinY, width, height),
new Point(sampleModelTranslateX + deltaX,
sampleModelTranslateY + deltaY), this);
}
/**
* Returns the bounding Rectangle of this Raster. This function returns
* the same information as getMinX/MinY/Width/Height.
* @return the bounding box of this <code>Raster</code>.
*/
public Rectangle getBounds() {
return new Rectangle(minX, minY, width, height);
}
/** Returns the minimum valid X coordinate of the Raster.
* @return the minimum x coordinate of this <code>Raster</code>.
*/
final public int getMinX() {
return minX;
}
/** Returns the minimum valid Y coordinate of the Raster.
* @return the minimum y coordinate of this <code>Raster</code>.
*/
final public int getMinY() {
return minY;
}
/** Returns the width in pixels of the Raster.
* @return the width of this <code>Raster</code>.
*/
final public int getWidth() {
return width;
}
/** Returns the height in pixels of the Raster.
* @return the height of this <code>Raster</code>.
*/
final public int getHeight() {
return height;
}
/** Returns the number of bands (samples per pixel) in this Raster.
* @return the number of bands of this <code>Raster</code>.
*/
final public int getNumBands() {
return numBands;
}
/**
* Returns the number of data elements needed to transfer one pixel
* via the getDataElements and setDataElements methods. When pixels
* are transferred via these methods, they may be transferred in a
* packed or unpacked format, depending on the implementation of the
* underlying SampleModel. Using these methods, pixels are transferred
* as an array of getNumDataElements() elements of a primitive type given
* by getTransferType(). The TransferType may or may not be the same
* as the storage data type of the DataBuffer.
* @return the number of data elements.
*/
final public int getNumDataElements() {
return sampleModel.getNumDataElements();
}
/**
* Returns the TransferType used to transfer pixels via the
* getDataElements and setDataElements methods. When pixels
* are transferred via these methods, they may be transferred in a
* packed or unpacked format, depending on the implementation of the
* underlying SampleModel. Using these methods, pixels are transferred
* as an array of getNumDataElements() elements of a primitive type given
* by getTransferType(). The TransferType may or may not be the same
* as the storage data type of the DataBuffer. The TransferType will
* be one of the types defined in DataBuffer.
* @return this transfer type.
*/
final public int getTransferType() {
return sampleModel.getTransferType();
}
/** Returns the DataBuffer associated with this Raster.
* @return the <code>DataBuffer</code> of this <code>Raster</code>.
*/
public DataBuffer getDataBuffer() {
return dataBuffer;
}
/** Returns the SampleModel that describes the layout of the image data.
* @return the <code>SampleModel</code> of this <code>Raster</code>.
*/
public SampleModel getSampleModel() {
return sampleModel;
}
/**
* Returns data for a single pixel in a primitive array of type
* TransferType. For image data supported by the Java 2D(tm) API,
* this will be one of DataBuffer.TYPE_BYTE, DataBuffer.TYPE_USHORT,
* DataBuffer.TYPE_INT, DataBuffer.TYPE_SHORT, DataBuffer.TYPE_FLOAT,
* or DataBuffer.TYPE_DOUBLE. Data may be returned in a packed format,
* thus increasing efficiency for data transfers.
* An ArrayIndexOutOfBoundsException may be thrown
* if the coordinates are not in bounds. However, explicit bounds
* checking is not guaranteed.
* A ClassCastException will be thrown if the input object is non null
* and references anything other than an array of TransferType.
* @see java.awt.image.SampleModel#getDataElements(int, int, Object, DataBuffer)
* @param x The X coordinate of the pixel location
* @param y The Y coordinate of the pixel location
* @param outData An object reference to an array of type defined by
* getTransferType() and length getNumDataElements().
* If null, an array of appropriate type and size will be
* allocated
* @return An object reference to an array of type defined by
* getTransferType() with the requested pixel data.
*
* @throws ArrayIndexOutOfBoundsException if the coordinates are not
* in bounds, or if outData is too small to hold the output.
*/
public Object getDataElements(int x, int y, Object outData) {
return sampleModel.getDataElements(x - sampleModelTranslateX,
y - sampleModelTranslateY,
outData, dataBuffer);
}
/**
* Returns the pixel data for the specified rectangle of pixels in a
* primitive array of type TransferType.
* For image data supported by the Java 2D API, this
* will be one of DataBuffer.TYPE_BYTE, DataBuffer.TYPE_USHORT,
* DataBuffer.TYPE_INT, DataBuffer.TYPE_SHORT, DataBuffer.TYPE_FLOAT,
* or DataBuffer.TYPE_DOUBLE. Data may be returned in a packed format,
* thus increasing efficiency for data transfers.
* An ArrayIndexOutOfBoundsException may be thrown
* if the coordinates are not in bounds. However, explicit bounds
* checking is not guaranteed.
* A ClassCastException will be thrown if the input object is non null
* and references anything other than an array of TransferType.
* @see java.awt.image.SampleModel#getDataElements(int, int, int, int, Object, DataBuffer)
* @param x The X coordinate of the upper-left pixel location
* @param y The Y coordinate of the upper-left pixel location
* @param w Width of the pixel rectangle
* @param h Height of the pixel rectangle
* @param outData An object reference to an array of type defined by
* getTransferType() and length w*h*getNumDataElements().
* If null, an array of appropriate type and size will be
* allocated.
* @return An object reference to an array of type defined by
* getTransferType() with the requested pixel data.
*
* @throws ArrayIndexOutOfBoundsException if the coordinates are not
* in bounds, or if outData is too small to hold the output.
*/
public Object getDataElements(int x, int y, int w, int h, Object outData) {
return sampleModel.getDataElements(x - sampleModelTranslateX,
y - sampleModelTranslateY,
w, h, outData, dataBuffer);
}
/**
* Returns the samples in an array of int for the specified pixel.
* An ArrayIndexOutOfBoundsException may be thrown
* if the coordinates are not in bounds. However, explicit bounds
* checking is not guaranteed.
* @param x The X coordinate of the pixel location
* @param y The Y coordinate of the pixel location
* @param iArray An optionally preallocated int array
* @return the samples for the specified pixel.
*
* @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[]) {
return sampleModel.getPixel(x - sampleModelTranslateX,
y - sampleModelTranslateY,
iArray, dataBuffer);
}
/**
* Returns the samples in an array of float for the
* specified pixel.
* An ArrayIndexOutOfBoundsException may be thrown
* if the coordinates are not in bounds. However, explicit bounds
* checking is not guaranteed.
* @param x The X coordinate of the pixel location
* @param y The Y coordinate of the pixel location
* @param fArray An optionally preallocated float array
* @return the samples for the specified pixel.
*
* @throws ArrayIndexOutOfBoundsException if the coordinates are not
* in bounds, or if fArray is too small to hold the output.
*/
public float[] getPixel(int x, int y, float fArray[]) {
return sampleModel.getPixel(x - sampleModelTranslateX,
y - sampleModelTranslateY,
fArray, dataBuffer);
}
/**
* Returns the samples in an array of double for the specified pixel.
* An ArrayIndexOutOfBoundsException may be thrown
* if the coordinates are not in bounds. However, explicit bounds
* checking is not guaranteed.
* @param x The X coordinate of the pixel location
* @param y The Y coordinate of the pixel location
* @param dArray An optionally preallocated double array
* @return the samples for the specified pixel.
*
* @throws ArrayIndexOutOfBoundsException if the coordinates are not
* in bounds, or if dArray is too small to hold the output.
*/
public double[] getPixel(int x, int y, double dArray[]) {
return sampleModel.getPixel(x - sampleModelTranslateX,
y - sampleModelTranslateY,
dArray, dataBuffer);
}
/**
* Returns an int array containing all samples for a rectangle of pixels,
* one sample per array element.
* An ArrayIndexOutOfBoundsException may be thrown
* if the coordinates are not in bounds. However, explicit bounds
* checking is not guaranteed.
* @param x The X coordinate of the upper-left pixel location
* @param y The Y coordinate of the upper-left pixel location
* @param w Width of the pixel rectangle
* @param h Height of the pixel rectangle
* @param iArray An optionally pre-allocated int array
* @return the samples for the specified rectangle of pixels.
*
* @throws ArrayIndexOutOfBoundsException if the coordinates are not
* in bounds, or if iArray is too small to hold the output.
*/
public int[] getPixels(int x, int y, int w, int h, int iArray[]) {
return sampleModel.getPixels(x - sampleModelTranslateX,
y - sampleModelTranslateY, w, h,
iArray, dataBuffer);
}
/**
* Returns a float array containing all samples for a rectangle of pixels,
* one sample per array element.
* An ArrayIndexOutOfBoundsException may be thrown
* if the coordinates are not in bounds. However, explicit bounds
* checking is not guaranteed.
* @param x The X coordinate of the pixel location
* @param y The Y coordinate of the pixel location
* @param w Width of the pixel rectangle
* @param h Height of the pixel rectangle
* @param fArray An optionally pre-allocated float array
* @return the samples for the specified rectangle of pixels.
*
* @throws ArrayIndexOutOfBoundsException if the coordinates are not
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