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/*
* Copyright (c) 1997, 2018, 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*** As an unpublished work pursuant to Title 17 of the United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.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;
private static 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}
* Rasters are not supported. To create a 1-band Raster of type
* {@code DataBuffer.TYPE_INT}, 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}
* @return a WritableRaster object with the specified data type,
* width, height and number of bands.
* @throws RasterFormatException if {@code w} or {@code h}
* is less than or equal to zero, or computing either
* {@code location.x + w} or
* {@code location.y + h} 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}
* Rasters are not supported. To create a 1-band Raster of type
* {@code DataBuffer.TYPE_INT}, 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}
* @return a WritableRaster object with the specified data type,
* width, height, scanline stride, pixel stride and band
* offsets.
* @throws RasterFormatException if {@code w} or {@code h}
* is less than or equal to zero, or computing either
* {@code location.x + w} or
* {@code location.y + h} results in integer
* overflow
* @throws IllegalArgumentException if {@code dataType} is not
* one of the supported data types, which are
* {@code DataBuffer.TYPE_BYTE}, or
* {@code DataBuffer.TYPE_USHORT}.
*/
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}
* @return a WritableRaster object with the specified data type,
* width, height and number of bands.
* @throws RasterFormatException if {@code w} or {@code h}
* is less than or equal to zero, or computing either
* {@code location.x + w} or
* {@code location.y + h} results in integer
* overflow
* @throws ArrayIndexOutOfBoundsException if {@code bands}
* 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}
* @return a WritableRaster object with the specified data type,
* width, height, scanline stride, bank indices and band
* offsets.
* @throws RasterFormatException if {@code w} or {@code h}
* is less than or equal to zero, or computing either
* {@code location.x + w} or
* {@code location.y + h} results in integer
* overflow
* @throws IllegalArgumentException if {@code dataType} is not
* one of the supported data types, which are
* {@code DataBuffer.TYPE_BYTE},
* {@code DataBuffer.TYPE_USHORT}
* or {@code DataBuffer.TYPE_INT}
* @throws ArrayIndexOutOfBoundsException if {@code bankIndices}
* or {@code bandOffsets} is {@code null}
*/
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) + // first (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}
* @return a WritableRaster object with the specified data type,
* width, height, and band masks.
* @throws RasterFormatException if {@code w} or {@code h}
* is less than or equal to zero, or computing either
* {@code location.x + w} or
* {@code location.y + h} results in integer
* overflow
* @throws IllegalArgumentException if {@code dataType} is not
* one of the supported data types, which are
* {@code DataBuffer.TYPE_BYTE},
* {@code DataBuffer.TYPE_USHORT}
* or {@code DataBuffer.TYPE_INT}
*/
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}
* @return a WritableRaster object with the specified data type,
* width, height, number of bands, and bits per band.
* @throws RasterFormatException if {@code w} or {@code h}
* is less than or equal to zero, or computing either
* {@code location.x + w} or
* {@code location.y + h} results in integer
* overflow
* @throws IllegalArgumentException if the product of
* {@code bitsPerBand} and {@code bands} is
* greater than the number of bits held by
* {@code dataType}
* @throws IllegalArgumentException if {@code bitsPerBand} or
* {@code bands} is not greater than zero
* @throws IllegalArgumentException if {@code dataType} is not
* one of the supported data types, which are
* {@code DataBuffer.TYPE_BYTE},
* {@code DataBuffer.TYPE_USHORT}
* or {@code DataBuffer.TYPE_INT}
*/
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}
* Rasters are not supported. To create a 1-band Raster of type
* {@code DataBuffer.TYPE_INT}, use
* Raster.createPackedRaster().
* @param dataBuffer the {@code DataBuffer} 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}
* @return a WritableRaster object with the specified
* {@code DataBuffer}, width, height, scanline stride,
* pixel stride and band offsets.
* @throws RasterFormatException if {@code w} or {@code h}
* is less than or equal to zero, or computing either
* {@code location.x + w} or
* {@code location.y + h} results in integer
* overflow
* @throws IllegalArgumentException if {@code dataType} is not
* one of the supported data types, which are
* {@code DataBuffer.TYPE_BYTE},
* {@code DataBuffer.TYPE_USHORT}
* @throws RasterFormatException if {@code dataBuffer} has more
* than one bank.
* @throws NullPointerException if {@code dataBuffer} 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:
if (dataBuffer instanceof DataBufferByte) {
return new ByteInterleavedRaster(csm,
(DataBufferByte) dataBuffer, location);
}
break;
case DataBuffer.TYPE_USHORT:
if (dataBuffer instanceof DataBufferUShort) {
return new ShortInterleavedRaster(csm,
(DataBufferUShort) dataBuffer, location);
}
break;
default:
throw new IllegalArgumentException("Unsupported data type " +
dataType);
}
// Create the generic raster
return new SunWritableRaster(csm, dataBuffer, location);
}
/**
* 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} 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}
* @return a WritableRaster object with the specified
* {@code DataBuffer}, width, height, scanline stride,
* bank indices and band offsets.
* @throws RasterFormatException if {@code w} or {@code h}
* is less than or equal to zero, or computing either
* {@code location.x + w} or
* {@code location.y + h} results in integer
* overflow
* @throws IllegalArgumentException if {@code dataType} is not
* one of the supported data types, which are
* {@code DataBuffer.TYPE_BYTE},
* {@code DataBuffer.TYPE_USHORT}
* or {@code DataBuffer.TYPE_INT}
* @throws NullPointerException if {@code dataBuffer} 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:
if (dataBuffer instanceof DataBufferByte) {
return new ByteBandedRaster(bsm,
(DataBufferByte) dataBuffer, location);
}
break;
case DataBuffer.TYPE_USHORT:
if (dataBuffer instanceof DataBufferUShort) {
return new ShortBandedRaster(bsm,
(DataBufferUShort) dataBuffer, location);
}
break;
case DataBuffer.TYPE_INT:
break;
default:
throw new IllegalArgumentException("Unsupported data type " +
dataType);
}
// Create the generic raster
return new SunWritableRaster(bsm, dataBuffer, location);
}
/**
* 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} 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}
* @return a WritableRaster object with the specified
* {@code DataBuffer}, width, height, scanline stride,
* and band masks.
* @throws RasterFormatException if {@code w} or {@code h}
* is less than or equal to zero, or computing either
* {@code location.x + w} or
* {@code location.y + h} results in integer
* overflow
* @throws IllegalArgumentException if {@code dataType} is not
* one of the supported data types, which are
* {@code DataBuffer.TYPE_BYTE},
* {@code DataBuffer.TYPE_USHORT}
* or {@code DataBuffer.TYPE_INT}
* @throws RasterFormatException if {@code dataBuffer} has more
* than one bank.
* @throws NullPointerException if {@code dataBuffer} 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:
if (dataBuffer instanceof DataBufferByte) {
return new ByteInterleavedRaster(sppsm,
(DataBufferByte) dataBuffer, location);
}
break;
case DataBuffer.TYPE_USHORT:
if (dataBuffer instanceof DataBufferUShort) {
return new ShortInterleavedRaster(sppsm,
(DataBufferUShort) dataBuffer, location);
}
break;
case DataBuffer.TYPE_INT:
if (dataBuffer instanceof DataBufferInt) {
return new IntegerInterleavedRaster(sppsm,
(DataBufferInt) dataBuffer, location);
}
break;
default:
throw new IllegalArgumentException("Unsupported data type " +
dataType);
}
// Create the generic raster
return new SunWritableRaster(sppsm, dataBuffer, location);
}
/**
* 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} 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}
* @return a WritableRaster object with the specified
* {@code DataBuffer}, width, height, and
* bits per pixel.
* @throws RasterFormatException if {@code w} or {@code h}
* is less than or equal to zero, or computing either
* {@code location.x + w} or
* {@code location.y + h} results in integer
* overflow
* @throws IllegalArgumentException if {@code dataType} is not
* one of the supported data types, which are
* {@code DataBuffer.TYPE_BYTE},
* {@code DataBuffer.TYPE_USHORT}
* or {@code DataBuffer.TYPE_INT}
* @throws RasterFormatException if {@code dataBuffer} has more
* than one bank.
* @throws NullPointerException if {@code dataBuffer} 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 (dataBuffer instanceof DataBufferByte &&
(bitsPerPixel == 1 || bitsPerPixel == 2 || bitsPerPixel == 4))
{
return new BytePackedRaster(mppsm, (DataBufferByte) 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}
* @param db the specified {@code DataBuffer}
* @param location the upper-left corner of the {@code Raster}
* @return a {@code Raster} with the specified
* {@code SampleModel}, {@code DataBuffer}, and
* location.
* @throws RasterFormatException if computing either
* {@code location.x + sm.getWidth()} or
* {@code location.y + sm.getHeight()} results in integer
* overflow
* @throws RasterFormatException if {@code db} has more
* than one bank and {@code sm} 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:
if (db instanceof DataBufferByte) {
return new ByteInterleavedRaster(sm,
(DataBufferByte) db, location);
}
break;
case DataBuffer.TYPE_USHORT:
if (db instanceof DataBufferUShort) {
return new ShortInterleavedRaster(sm,
(DataBufferUShort) db, location);
}
break;
}
} else if (sm instanceof SinglePixelPackedSampleModel) {
switch(dataType) {
case DataBuffer.TYPE_BYTE:
if (db instanceof DataBufferByte) {
return new ByteInterleavedRaster(sm,
(DataBufferByte) db, location);
}
break;
case DataBuffer.TYPE_USHORT:
if (db instanceof DataBufferUShort) {
return new ShortInterleavedRaster(sm,
(DataBufferUShort) db, location);
}
break;
case DataBuffer.TYPE_INT:
if (db instanceof DataBufferInt) {
return new IntegerInterleavedRaster(sm,
(DataBufferInt) db, location);
}
break;
}
} else if (sm instanceof MultiPixelPackedSampleModel &&
dataType == DataBuffer.TYPE_BYTE &&
db instanceof DataBufferByte &&
sm.getSampleSize(0) < 8)
{
return new BytePackedRaster(sm, (DataBufferByte) 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}
* @param location the upper-left corner of the
* {@code WritableRaster}
* @return a {@code WritableRaster} with the specified
* {@code SampleModel} and location.
* @throws RasterFormatException if computing either
* {@code location.x + sm.getWidth()} or
* {@code location.y + sm.getHeight()} results in integer
* overflow
*/
public static WritableRaster createWritableRaster(SampleModel sm,
Point location) {