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	/*
	* 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
	* or visit www.oracle.com if you need additional information or have any
	* questions.
	*/

	package sun.awt.image;
	import java.awt.image.Raster;
	import java.awt.image.WritableRaster;
	import java.awt.image.RasterFormatException;
	import java.awt.image.SampleModel;
	import java.awt.image.MultiPixelPackedSampleModel;
	import java.awt.image.DataBuffer;
	import java.awt.image.DataBufferByte;
	import java.awt.Rectangle;
	import java.awt.Point;

	/**
	* This class is useful for describing 1, 2, or 4 bit image data
	* elements. This raster has one band whose pixels are packed
	* together into individual bytes in a single byte array. This type
	* of raster can be used with an IndexColorModel. This raster uses a
	* MultiPixelPackedSampleModel.
	*
	*/
	public class BytePackedRaster extends SunWritableRaster {

	/** The data bit offset for each pixel. */
	int dataBitOffset;

	/** Scanline stride of the image data contained in this Raster. */
	int scanlineStride;

	/**
	* The bit stride of a pixel, equal to the total number of bits
	* required to store a pixel.
	*/
	int pixelBitStride;

	/** The bit mask for extracting the pixel. */
	int bitMask;

	/** The image data array. */
	byte[] data;

	/** 8 minus the pixel bit stride. */
	int shiftOffset;

	int type;

	/** A cached copy of minX + width for use in bounds checks. */
	private int maxX;

	/** A cached copy of minY + height for use in bounds checks. */
	private int maxY;

	static private native void initIDs();
	static {
	/* ensure that the necessary native libraries are loaded */
	NativeLibLoader.loadLibraries();
	initIDs();
	}

	/**
	* Constructs a BytePackedRaster 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. SampleModel must be of type
	* MultiPixelPackedSampleModel.
	* @param sampleModel The SampleModel that specifies the layout.
	* @param origin The Point that specified the origin.
	*/
	public BytePackedRaster(SampleModel sampleModel,
	Point origin) {
	this(sampleModel,
	sampleModel.createDataBuffer(),
	new Rectangle(origin.x,
	origin.y,
	sampleModel.getWidth(),
	sampleModel.getHeight()),
	origin,
	null);
	}

	/**
	* Constructs a BytePackedRaster 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 a DataBufferByte compatible with SampleModel.
	* SampleModel must be of type MultiPixelPackedSampleModel.
	* @param sampleModel The SampleModel that specifies the layout.
	* @param dataBuffer The DataBufferShort that contains the image data.
	* @param origin The Point that specifies the origin.
	*/
	public BytePackedRaster(SampleModel sampleModel,
	DataBuffer dataBuffer,
	Point origin) {
	this(sampleModel,
	dataBuffer,
	new Rectangle(origin.x,
	origin.y,
	sampleModel.getWidth(),
	sampleModel.getHeight()),
	origin,
	null);
	}

	/**
	* Constructs a BytePackedRaster with the given SampleModel,
	* DataBuffer, and parent. DataBuffer must be a DataBufferByte and
	* SampleModel must be of type MultiPixelPackedSampleModel.
	* When translated into the base Raster's
	* coordinate system, aRegion must be contained by the base Raster.
	* Origin is the coordinate in the new Raster's coordinate system of
	* the origin of the base Raster. (The base Raster is the Raster's
	* ancestor which has no parent.)
	*
	* 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 DataBufferShort that contains the image data.
	* @param aRegion The Rectangle that specifies the image area.
	* @param origin The Point that specifies the origin.
	* @param parent The parent (if any) of this raster.
	*
	* @exception RasterFormatException if the parameters do not conform
	* to requirements of this Raster type.
	*/
	public BytePackedRaster(SampleModel sampleModel,
	DataBuffer dataBuffer,
	Rectangle aRegion,
	Point origin,
	BytePackedRaster parent){
	super(sampleModel,dataBuffer,aRegion,origin, parent);
	this.maxX = minX + width;
	this.maxY = minY + height;

	if (!(dataBuffer instanceof DataBufferByte)) {
	throw new RasterFormatException("BytePackedRasters must have" +
	"byte DataBuffers");
	}
	DataBufferByte dbb = (DataBufferByte)dataBuffer;
	this.data = stealData(dbb, 0);
	if (dbb.getNumBanks() != 1) {
	throw new
	RasterFormatException("DataBuffer for BytePackedRasters"+
	" must only have 1 bank.");
	}
	int dbOffset = dbb.getOffset();

	if (sampleModel instanceof MultiPixelPackedSampleModel) {
	MultiPixelPackedSampleModel mppsm =
	(MultiPixelPackedSampleModel)sampleModel;
	this.type = IntegerComponentRaster.TYPE_BYTE_BINARY_SAMPLES;
	pixelBitStride = mppsm.getPixelBitStride();
	if (pixelBitStride != 1 &&
	pixelBitStride != 2 &&
	pixelBitStride != 4) {
	throw new RasterFormatException
	("BytePackedRasters must have a bit depth of 1, 2, or 4");
	}
	scanlineStride = mppsm.getScanlineStride();
	dataBitOffset = mppsm.getDataBitOffset() + dbOffset*8;
	int xOffset = aRegion.x - origin.x;
	int yOffset = aRegion.y - origin.y;
	dataBitOffset += xOffsetpixelBitStride + yOffsetscanlineStride*8;
	bitMask = (1 << pixelBitStride) -1;
	shiftOffset = 8 - pixelBitStride;
	} else {
	throw new RasterFormatException("BytePackedRasters must have"+
	"MultiPixelPackedSampleModel");
	}
	verify(false);
	}

	/**
	* Returns the data bit offset for the Raster. The data
	* bit offset is the bit index into the data array element
	* corresponding to the first sample of the first scanline.
	*/
	public int getDataBitOffset() {
	return dataBitOffset;
	}

	/**
	* Returns the scanline stride -- the number of data array elements between
	* a given sample and the sample in the same column
	* of the next row.
	*/
	public int getScanlineStride() {
	return scanlineStride;
	}

	/**
	* Returns pixel bit stride -- the number of bits between two
	* samples on the same scanline.
	*/
	public int getPixelBitStride() {
	return pixelBitStride;
	}

	/**
	* Returns a reference to the entire data array.
	*/
	public byte[] getDataStorage() {
	return data;
	}

	/**
	* Returns the data element at the specified
	* location.
	* An ArrayIndexOutOfBounds exception will be thrown at runtime
	* if the pixel coordinate is out of bounds.
	* A ClassCastException will be thrown if the input object is non null
	* and references anything other than an array of transferType.
	* @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 request pixel data.
	*/
	public Object getDataElements(int x, int y, Object obj) {
	if ((x < this.minX) \|\| (y < this.minY) \|\|
	(x >= this.maxX) \|\| (y >= this.maxY)) {
	throw new ArrayIndexOutOfBoundsException
	("Coordinate out of bounds!");
	}
	byte outData[];
	if (obj == null) {
	outData = new byte[numDataElements];
	} else {
	outData = (byte[])obj;
	}
	int bitnum = dataBitOffset + (x-minX) * pixelBitStride;
	// Fix 4184283
	int element = data[(y-minY) * scanlineStride + (bitnum >> 3)] & 0xff;
	int shift = shiftOffset - (bitnum & 7);
	outData[0] = (byte)((element >> shift) & bitMask);
	return outData;
	}

	/**
	* 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, or
	* DataBuffer.TYPE_INT. 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.
	* 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 whgetNumDataElements().
	* 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.
	*/
	public Object getDataElements(int x, int y, int w, int h,
	Object outData) {
	return getByteData(x, y, w, h, (byte[])outData);
	}

	/**
	* Returns an array of data elements from the specified rectangular
	* region.
	*
	* An ArrayIndexOutOfBounds exception will be thrown at runtime
	* if the pixel coordinates are out of bounds.
	* A ClassCastException will be thrown if the input object is non null
	* and references anything other than an array of transferType.
	* <pre>
	* byte[] bandData = (byte[])raster.getPixelData(x, y, w, h, null);
	* int pixel;
	* // To find a data element at location (x2, y2)
	* pixel = bandData[((y2-y)*w + (x2-x))];
	* </pre>
	* @param x The X coordinate of the upper left pixel location.
	* @param y The Y coordinate of the upper left pixel location.
	* @param width Width of the pixel rectangle.
	* @param height Height of the pixel rectangle.
	* @param outData An object reference to an array of type defined by
	* getTransferType() and length whgetNumDataElements().
	* 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 request pixel data.
	*/
	public Object getPixelData(int x, int y, int w, int h, Object obj) {
	if ((x < this.minX) \|\| (y < this.minY) \|\|
	(x + w > this.maxX) \|\| (y + h > this.maxY)) {
	throw new ArrayIndexOutOfBoundsException
	("Coordinate out of bounds!");
	}
	byte outData[];
	if (obj == null) {
	outData = new byte[numDataElementswh];
	} else {
	outData = (byte[])obj;
	}
	int pixbits = pixelBitStride;
	int scanbit = dataBitOffset + (x-minX) * pixbits;
	int index = (y-minY) * scanlineStride;
	int outindex = 0;
	byte data[] = this.data;

	for (int j = 0; j < h; j++) {
	int bitnum = scanbit;
	for (int i = 0; i < w; i++) {
	int shift = shiftOffset - (bitnum & 7);
	outData[outindex++] =
	(byte)(bitMask & (data[index + (bitnum >> 3)] >> shift));
	bitnum += pixbits;
	}
	index += scanlineStride;
	}
	return outData;
	}

	/**
	* Returns a byte array containing the specified data elements
	* from the data array. The band index will be ignored.
	* An ArrayIndexOutOfBounds exception will be thrown at runtime
	* if the pixel coordinates are out of bounds.
	* <pre>
	* byte[] byteData = getByteData(x, y, band, w, h, null);
	* // To find a data element at location (x2, y2)
	* byte element = byteData[(y2-y)*w + (x2-x)];
	* </pre>
	* @param x The X coordinate of the upper left pixel location.
	* @param y The Y coordinate of the upper left pixel location.
	* @param width Width of the pixel rectangle.
	* @param height Height of the pixel rectangle.
	* @param band The band to return, is ignored.
	* @param outData If non-null, data elements
	* at the specified locations are returned in this array.
	* @return Byte array with data elements.
	*/
	public byte[] getByteData(int x, int y, int w, int h,
	int band, byte[] outData) {
	return getByteData(x, y, w, h, outData);
	}

	/**
	* Returns a byte array containing the specified data elements
	* from the data array.
	* An ArrayIndexOutOfBounds exception will be thrown at runtime
	* if the pixel coordinates are out of bounds.
	* <pre>
	* byte[] byteData = raster.getByteData(x, y, w, h, null);
	* byte pixel;
	* // To find a data element at location (x2, y2)
	* pixel = byteData[((y2-y)*w + (x2-x))];
	* </pre>
	* @param x The X coordinate of the upper left pixel location.
	* @param y The Y coordinate of the upper left pixel location.
	* @param width Width of the pixel rectangle.
	* @param height Height of the pixel rectangle.
	* @param outData If non-null, data elements
	* at the specified locations are returned in this array.
	* @return Byte array with data elements.
	*/
	public byte[] getByteData(int x, int y, int w, int h, byte[] outData) {
	if ((x < this.minX) \|\| (y < this.minY) \|\|
	(x + w > this.maxX) \|\| (y + h > this.maxY)) {
	throw new ArrayIndexOutOfBoundsException
	("Coordinate out of bounds!");
	}
	if (outData == null) {
	outData = new byte[w * h];
	}
	int pixbits = pixelBitStride;
	int scanbit = dataBitOffset + (x-minX) * pixbits;
	int index = (y-minY) * scanlineStride;
	int outindex = 0;
	byte data[] = this.data;

	for (int j = 0; j < h; j++) {
	int bitnum = scanbit;
	int element;

	// Process initial portion of scanline
	int i = 0;
	while ((i < w) && ((bitnum & 7) != 0)) {
	int shift = shiftOffset - (bitnum & 7);
	outData[outindex++] =
	(byte)(bitMask & (data[index + (bitnum >> 3)] >> shift));
	bitnum += pixbits;
	i++;
	}

	// Process central portion of scanline 8 pixels at a time
	int inIndex = index + (bitnum >> 3);
	switch (pixbits) {
	case 1:
	for (; i < w - 7; i += 8) {
	element = data[inIndex++];
	outData[outindex++] = (byte)((element >> 7) & 1);
	outData[outindex++] = (byte)((element >> 6) & 1);
	outData[outindex++] = (byte)((element >> 5) & 1);
	outData[outindex++] = (byte)((element >> 4) & 1);
	outData[outindex++] = (byte)((element >> 3) & 1);
	outData[outindex++] = (byte)((element >> 2) & 1);
	outData[outindex++] = (byte)((element >> 1) & 1);
	outData[outindex++] = (byte)(element & 1);
	bitnum += 8;
	}
	break;

	case 2:
	for (; i < w - 7; i += 8) {
	element = data[inIndex++];
	outData[outindex++] = (byte)((element >> 6) & 3);
	outData[outindex++] = (byte)((element >> 4) & 3);
	outData[outindex++] = (byte)((element >> 2) & 3);
	outData[outindex++] = (byte)(element & 3);

	element = data[inIndex++];
	outData[outindex++] = (byte)((element >> 6) & 3);
	outData[outindex++] = (byte)((element >> 4) & 3);
	outData[outindex++] = (byte)((element >> 2) & 3);
	outData[outindex++] = (byte)(element & 3);

	bitnum += 16;
	}
	break;

	case 4:
	for (; i < w - 7; i += 8) {
	element = data[inIndex++];
	outData[outindex++] = (byte)((element >> 4) & 0xf);
	outData[outindex++] = (byte)(element & 0xf);

	element = data[inIndex++];
	outData[outindex++] = (byte)((element >> 4) & 0xf);
	outData[outindex++] = (byte)(element & 0xf);

	element = data[inIndex++];
	outData[outindex++] = (byte)((element >> 4) & 0xf);
	outData[outindex++] = (byte)(element & 0xf);

	element = data[inIndex++];
	outData[outindex++] = (byte)((element >> 4) & 0xf);
	outData[outindex++] = (byte)(element & 0xf);

	bitnum += 32;
	}
	break;
	}

	// Process final portion of scanline
	for (; i < w; i++) {
	int shift = shiftOffset - (bitnum & 7);
	outData[outindex++] =
	(byte) (bitMask & (data[index + (bitnum >> 3)] >> shift));
	bitnum += pixbits;
	}

	index += scanlineStride;
	}

	return outData;
	}

	/**
	* Stores the data elements at the specified location.
	* An ArrayIndexOutOfBounds exception will be thrown at runtime
	* if the pixel coordinate is out of bounds.
	* A ClassCastException will be thrown if the input object is non null
	* and references anything other than an array of transferType.
	* @param x The X coordinate of the pixel location.
	* @param y The Y coordinate of the pixel location.
	* @param inData An object reference to an array of type defined by
	* getTransferType() and length getNumDataElements()
	* containing the pixel data to place at x,y.
	*/
	public void setDataElements(int x, int y, Object obj) {
	if ((x < this.minX) \|\| (y < this.minY) \|\|
	(x >= this.maxX) \|\| (y >= this.maxY)) {
	throw new ArrayIndexOutOfBoundsException
	("Coordinate out of bounds!");
	}
	byte inData[] = (byte[])obj;
	int bitnum = dataBitOffset + (x-minX) * pixelBitStride;
	int index = (y-minY) * scanlineStride + (bitnum >> 3);
	int shift = shiftOffset - (bitnum & 7);

	byte element = data[index];
	element &= ~(bitMask << shift);
	element \|= (inData[0] & bitMask) << shift;
	data[index] = element;

	markDirty();
	}

	/**
	* Stores the Raster data at the specified location.
	* An ArrayIndexOutOfBounds exception will be thrown at runtime
	* if the pixel coordinates are out of bounds.
	* @param x The X coordinate of the pixel location.
	* @param y The Y coordinate of the pixel location.
	* @param inRaster Raster of data to place at x,y location.
	*/
	public void setDataElements(int x, int y, Raster inRaster) {
	// Check if we can use fast code
	if (!(inRaster instanceof BytePackedRaster) \|\|
	((BytePackedRaster)inRaster).pixelBitStride != pixelBitStride) {
	super.setDataElements(x, y, inRaster);
	return;
	}

	int srcOffX = inRaster.getMinX();
	int srcOffY = inRaster.getMinY();
	int dstOffX = srcOffX + x;
	int dstOffY = srcOffY + y;
	int width = inRaster.getWidth();
	int height = inRaster.getHeight();
	if ((dstOffX < this.minX) \|\| (dstOffY < this.minY) \|\|
	(dstOffX + width > this.maxX) \|\| (dstOffY + height > this.maxY)) {
	throw new ArrayIndexOutOfBoundsException
	("Coordinate out of bounds!");
	}
	setDataElements(dstOffX, dstOffY,
	srcOffX, srcOffY,
	width, height,
	(BytePackedRaster)inRaster);
	}

	/**
	* Stores the Raster data at the specified location.
	* @param dstX The absolute X coordinate of the destination pixel
	* that will receive a copy of the upper-left pixel of the
	* inRaster
	* @param dstY The absolute Y coordinate of the destination pixel
	* that will receive a copy of the upper-left pixel of the
	* inRaster
	* @param srcX The absolute X coordinate of the upper-left source
	* pixel that will be copied into this Raster
	* @param srcY The absolute Y coordinate of the upper-left source
	* pixel that will be copied into this Raster
	* @param width The number of pixels to store horizontally
	* @param height The number of pixels to store vertically
	* @param inRaster BytePackedRaster of data to place at x,y location.
	*/
	private void setDataElements(int dstX, int dstY,
	int srcX, int srcY,
	int width, int height,
	BytePackedRaster inRaster) {
	// Assume bounds checking has been performed previously
	if (width <= 0 \|\| height <= 0) {
	return;
	}

	byte[] inData = inRaster.data;
	byte[] outData = this.data;

	int inscan = inRaster.scanlineStride;
	int outscan = this.scanlineStride;
	int inbit = inRaster.dataBitOffset +
	8 * (srcY - inRaster.minY) * inscan +
	(srcX - inRaster.minX) * inRaster.pixelBitStride;
	int outbit = (this.dataBitOffset +
	8 * (dstY - minY) * outscan +
	(dstX - minX) * this.pixelBitStride);
	int copybits = width * pixelBitStride;

	// Check whether the same bit alignment is present in both
	// Rasters; if so, we can copy whole bytes using
	// System.arraycopy. If not, we must do a "funnel shift"
	// where adjacent bytes contribute to each destination byte.
	if ((inbit & 7) == (outbit & 7)) {
	// copy is bit aligned
	int bitpos = outbit & 7;
	if (bitpos != 0) {
	int bits = 8 - bitpos;
	// Copy partial bytes on left
	int inbyte = inbit >> 3;
	int outbyte = outbit >> 3;
	int mask = 0xff >> bitpos;
	if (copybits < bits) {
	// Fix bug 4399076: previously had '8 - copybits' instead
	// of 'bits - copybits'.
	//
	// Prior to the this expression, 'mask' has its rightmost
	// 'bits' bits set to '1'. We want it to have a total
	// of 'copybits' bits set, therefore we want to introduce
	// 'bits - copybits' zeroes on the right.
	mask &= 0xff << (bits - copybits);
	bits = copybits;
	}
	for (int j = 0; j < height; j++) {
	int element = outData[outbyte];
	element &= ~mask;
	element \|= (inData[inbyte] & mask);
	outData[outbyte] = (byte) element;
	inbyte += inscan;
	outbyte += outscan;
	}
	inbit += bits;
	outbit += bits;
	copybits -= bits;
	}
	if (copybits >= 8) {
	// Copy whole bytes
	int inbyte = inbit >> 3;
	int outbyte = outbit >> 3;
	int copybytes = copybits >> 3;
	if (copybytes == inscan && inscan == outscan) {
	System.arraycopy(inData, inbyte,
	outData, outbyte,
	inscan * height);
	} else {
	for (int j = 0; j < height; j++) {
	System.arraycopy(inData, inbyte,
	outData, outbyte,
	copybytes);
	inbyte += inscan;
	outbyte += outscan;
	}
	}

	int bits = copybytes*8;
	inbit += bits;
	outbit += bits;
	copybits -= bits;
	}
	if (copybits > 0) {
	// Copy partial bytes on right
	int inbyte = inbit >> 3;
	int outbyte = outbit >> 3;
	int mask = (0xff00 >> copybits) & 0xff;
	for (int j = 0; j < height; j++) {
	int element = outData[outbyte];
	element &= ~mask;
	element \|= (inData[inbyte] & mask);
	outData[outbyte] = (byte) element;
	inbyte += inscan;
	outbyte += outscan;
	}
	}
	} else {
	// Unaligned case, see RFE #4284166
	// Note that the code in that RFE is not correct

	// Insert bits into the first byte of the output
	// if either the starting bit position is not zero or
	// we are writing fewer than 8 bits in total
	int bitpos = outbit & 7;
	if (bitpos != 0 \|\| copybits < 8) {
	int bits = 8 - bitpos;
	int inbyte = inbit >> 3;
	int outbyte = outbit >> 3;

	int lshift = inbit & 7;
	int rshift = 8 - lshift;
	int mask = 0xff >> bitpos;
	if (copybits < bits) {
	// Fix mask if we're only writing a partial byte
	mask &= 0xff << (bits - copybits);
	bits = copybits;
	}
	int lastByte = inData.length - 1;
	for (int j = 0; j < height; j++) {
	// Read two bytes from the source if possible
	// Don't worry about going over a scanline boundary
	// since any extra bits won't get used anyway
	byte inData0 = inData[inbyte];
	byte inData1 = (byte)0;
	if (inbyte < lastByte) {
	inData1 = inData[inbyte + 1];
	}

	// Insert the new bits into the output
	int element = outData[outbyte];
	element &= ~mask;
	element \|= (((inData0 << lshift) \|
	((inData1 & 0xff) >> rshift))
	>> bitpos) & mask;
	outData[outbyte] = (byte)element;
	inbyte += inscan;
	outbyte += outscan;
	}

	inbit += bits;
	outbit += bits;
	copybits -= bits;
	}

	// Now we have outbit & 7 == 0 so we can write
	// complete bytes for a while

	// Make sure we have work to do in the central loop
	// to avoid reading past the end of the scanline
	if (copybits >= 8) {
	int inbyte = inbit >> 3;
	int outbyte = outbit >> 3;
	int copybytes = copybits >> 3;
	int lshift = inbit & 7;
	int rshift = 8 - lshift;

	for (int j = 0; j < height; j++) {
	int ibyte = inbyte + j*inscan;
	int obyte = outbyte + j*outscan;

	int inData0 = inData[ibyte];
	// Combine adjacent bytes while 8 or more bits left
	for (int i = 0; i < copybytes; i++) {
	int inData1 = inData[ibyte + 1];
	int val = (inData0 << lshift) \|
	((inData1 & 0xff) >> rshift);
	outData[obyte] = (byte)val;
	inData0 = inData1;

	++ibyte;
	++obyte;
	}
	}

	int bits = copybytes*8;
	inbit += bits;
	outbit += bits;
	copybits -= bits;
	}

	// Finish last byte
	if (copybits > 0) {
	int inbyte = inbit >> 3;
	int outbyte = outbit >> 3;
	int mask = (0xff00 >> copybits) & 0xff;
	int lshift = inbit & 7;
	int rshift = 8 - lshift;

	int lastByte = inData.length - 1;
	for (int j = 0; j < height; j++) {
	byte inData0 = inData[inbyte];
	byte inData1 = (byte)0;
	if (inbyte < lastByte) {
	inData1 = inData[inbyte + 1];
	}

	// Insert the new bits into the output
	int element = outData[outbyte];
	element &= ~mask;
	element \|= ((inData0 << lshift) \|
	((inData1 & 0xff) >> rshift)) & mask;
	outData[outbyte] = (byte)element;

	inbyte += inscan;
	outbyte += outscan;
	}
	}
	}

	markDirty();
	}

	/**
	* Copies pixels from Raster srcRaster to this WritableRaster.
	* For each (x, y) address in srcRaster, the corresponding pixel
	* is copied to address (x+dx, y+dy) in this WritableRaster,
	* unless (x+dx, y+dy) falls outside the bounds of this raster.
	* srcRaster must have the same number of bands as this WritableRaster.
	* The copy is a simple copy of source samples to the corresponding
	* destination samples. For details, see
	* {@link WritableRaster#setRect(Raster)}.
	*
	* @param dx The X translation factor from src space to dst space
	* of the copy.
	* @param dy The Y translation factor from src space to dst space
	* of the copy.
	* @param srcRaster The Raster from which to copy pixels.
	*/
	public void setRect(int dx, int dy, Raster srcRaster) {
	// Check if we can use fast code
	if (!(srcRaster instanceof BytePackedRaster) \|\|
	((BytePackedRaster)srcRaster).pixelBitStride != pixelBitStride) {
	super.setRect(dx, dy, srcRaster);
	return;
	}

	int width = srcRaster.getWidth();
	int height = srcRaster.getHeight();
	int srcOffX = srcRaster.getMinX();
	int srcOffY = srcRaster.getMinY();
	int dstOffX = dx+srcOffX;
	int dstOffY = dy+srcOffY;

	// Clip to this raster
	if (dstOffX < this.minX) {
	int skipX = this.minX - dstOffX;
	width -= skipX;
	srcOffX += skipX;
	dstOffX = this.minX;
	}
	if (dstOffY < this.minY) {
	int skipY = this.minY - dstOffY;
	height -= skipY;
	srcOffY += skipY;
	dstOffY = this.minY;
	}
	if (dstOffX+width > this.maxX) {
	width = this.maxX - dstOffX;
	}
	if (dstOffY+height > this.maxY) {
	height = this.maxY - dstOffY;
	}

	setDataElements(dstOffX, dstOffY,
	srcOffX, srcOffY,
	width, height,
	(BytePackedRaster)srcRaster);
	}

	/**
	* Stores an array of data elements into the specified rectangular
	* region.
	* An ArrayIndexOutOfBounds exception will be thrown at runtime
	* if the pixel coordinates are out of bounds.
	* A ClassCastException will be thrown if the input object is non null
	* and references anything other than an array of transferType.
	* The data elements in the
	* data array are assumed to be packed. That is, a data element
	* at location (x2, y2) would be found at:
	* <pre>
	* inData[((y2-y)*w + (x2-x))]
	* </pre>
	* @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 inData An object reference to an array of type defined by
	* getTransferType() and length whgetNumDataElements()
	* containing the pixel data to place between x,y and
	* x+h, y+h.
	*/
	public void setDataElements(int x, int y, int w, int h, Object obj) {
	putByteData(x, y, w, h, (byte[])obj);
	}

	/**
	* Stores a byte array of data elements into the specified rectangular
	* region. The band index will be ignored.
	* An ArrayIndexOutOfBounds exception will be thrown at runtime
	* if the pixel coordinates are out of bounds.
	* The data elements in the
	* data array are assumed to be packed. That is, a data element
	* at location (x2, y2) would be found at:
	* <pre>
	* inData[((y2-y)*w + (x2-x))]
	* </pre>
	* @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 band The band to set, is ignored.
	* @param inData The data elements to be stored.
	*/
	public void putByteData(int x, int y, int w, int h,
	int band, byte[] inData) {
	putByteData(x, y, w, h, inData);
	}

	/**
	* Stores a byte array of data elements into the specified rectangular
	* region.
	* An ArrayIndexOutOfBounds exception will be thrown at runtime
	* if the pixel coordinates are out of bounds.
	* The data elements in the
	* data array are assumed to be packed. That is, a data element
	* at location (x2, y2) would be found at:
	* <pre>
	* inData[((y2-y)*w + (x2-x))]
	* </pre>
	* @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 inData The data elements to be stored.
	*/
	public void putByteData(int x, int y, int w, int h, byte[] inData) {
	if ((x < this.minX) \|\| (y < this.minY) \|\|
	(x + w > this.maxX) \|\| (y + h > this.maxY)) {
	throw new ArrayIndexOutOfBoundsException
	("Coordinate out of bounds!");
	}
	if (w == 0 \|\| h == 0) {
	return;
	}

	int pixbits = pixelBitStride;
	int scanbit = dataBitOffset + (x - minX) * pixbits;
	int index = (y - minY) * scanlineStride;
	int outindex = 0;
	byte data[] = this.data;
	for (int j = 0; j < h; j++) {
	int bitnum = scanbit;
	int element;

	// Process initial portion of scanline
	int i = 0;
	while ((i < w) && ((bitnum & 7) != 0)) {
	int shift = shiftOffset - (bitnum & 7);
	element = data[index + (bitnum >> 3)];
	element &= ~(bitMask << shift);
	element \|= (inData[outindex++] & bitMask) << shift;
	data[index + (bitnum >> 3)] = (byte)element;

	bitnum += pixbits;
	i++;
	}

	// Process central portion of scanline 8 pixels at a time
	int inIndex = index + (bitnum >> 3);
	switch (pixbits) {
	case 1:
	for (; i < w - 7; i += 8) {
	element = (inData[outindex++] & 1) << 7;
	element \|= (inData[outindex++] & 1) << 6;
	element \|= (inData[outindex++] & 1) << 5;
	element \|= (inData[outindex++] & 1) << 4;
	element \|= (inData[outindex++] & 1) << 3;
	element \|= (inData[outindex++] & 1) << 2;
	element \|= (inData[outindex++] & 1) << 1;
	element \|= (inData[outindex++] & 1);

	data[inIndex++] = (byte)element;

	bitnum += 8;
	}
	break;

	case 2:
	for (; i < w - 7; i += 8) {
	element = (inData[outindex++] & 3) << 6;
	element \|= (inData[outindex++] & 3) << 4;
	element \|= (inData[outindex++] & 3) << 2;
	element \|= (inData[outindex++] & 3);
	data[inIndex++] = (byte)element;

	element = (inData[outindex++] & 3) << 6;
	element \|= (inData[outindex++] & 3) << 4;
	element \|= (inData[outindex++] & 3) << 2;
	element \|= (inData[outindex++] & 3);
	data[inIndex++] = (byte)element;

	bitnum += 16;
	}
	break;

	case 4:
	for (; i < w - 7; i += 8) {
	element = (inData[outindex++] & 0xf) << 4;
	element \|= (inData[outindex++] & 0xf);
	data[inIndex++] = (byte)element;

	element = (inData[outindex++] & 0xf) << 4;
	element \|= (inData[outindex++] & 0xf);
	data[inIndex++] = (byte)element;

	element = (inData[outindex++] & 0xf) << 4;
	element \|= (inData[outindex++] & 0xf);
	data[inIndex++] = (byte)element;

	element = (inData[outindex++] & 0xf) << 4;
	element \|= (inData[outindex++] & 0xf);
	data[inIndex++] = (byte)element;

	bitnum += 32;
	}
	break;
	}

	// Process final portion of scanline
	for (; i < w; i++) {
	int shift = shiftOffset - (bitnum & 7);

	element = data[index + (bitnum >> 3)];
	element &= ~(bitMask << shift);
	element \|= (inData[outindex++] & bitMask) << shift;
	data[index + (bitnum >> 3)] = (byte)element;

	bitnum += pixbits;
	}

	index += scanlineStride;
	}

	markDirty();
	}

	/**
	* 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.
	* @param x, y the coordinates 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.
	*/
	public int[] getPixels(int x, int y, int w, int h, int iArray[]) {
	if ((x < this.minX) \|\| (y < this.minY) \|\|
	(x + w > this.maxX) \|\| (y + h > this.maxY)) {
	throw new ArrayIndexOutOfBoundsException
	("Coordinate out of bounds!");
	}
	if (iArray == null) {
	iArray = new int[w * h];
	}
	int pixbits = pixelBitStride;
	int scanbit = dataBitOffset + (x-minX) * pixbits;
	int index = (y-minY) * scanlineStride;
	int outindex = 0;
	byte data[] = this.data;

	for (int j = 0; j < h; j++) {
	int bitnum = scanbit;
	int element;

	// Process initial portion of scanline
	int i = 0;
	while ((i < w) && ((bitnum & 7) != 0)) {
	int shift = shiftOffset - (bitnum & 7);
	iArray[outindex++] =
	bitMask & (data[index + (bitnum >> 3)] >> shift);
	bitnum += pixbits;
	i++;
	}

	// Process central portion of scanline 8 pixels at a time
	int inIndex = index + (bitnum >> 3);
	switch (pixbits) {
	case 1:
	for (; i < w - 7; i += 8) {
	element = data[inIndex++];
	iArray[outindex++] = (element >> 7) & 1;
	iArray[outindex++] = (element >> 6) & 1;
	iArray[outindex++] = (element >> 5) & 1;
	iArray[outindex++] = (element >> 4) & 1;
	iArray[outindex++] = (element >> 3) & 1;
	iArray[outindex++] = (element >> 2) & 1;
	iArray[outindex++] = (element >> 1) & 1;
	iArray[outindex++] = element & 1;
	bitnum += 8;
	}
	break;

	case 2:
	for (; i < w - 7; i += 8) {
	element = data[inIndex++];
	iArray[outindex++] = (element >> 6) & 3;
	iArray[outindex++] = (element >> 4) & 3;
	iArray[outindex++] = (element >> 2) & 3;
	iArray[outindex++] = element & 3;

	element = data[inIndex++];
	iArray[outindex++] = (element >> 6) & 3;
	iArray[outindex++] = (element >> 4) & 3;
	iArray[outindex++] = (element >> 2) & 3;
	iArray[outindex++] = element & 3;

	bitnum += 16;
	}
	break;

	case 4:
	for (; i < w - 7; i += 8) {
	element = data[inIndex++];
	iArray[outindex++] = (element >> 4) & 0xf;
	iArray[outindex++] = element & 0xf;

	element = data[inIndex++];
	iArray[outindex++] = (element >> 4) & 0xf;
	iArray[outindex++] = element & 0xf;

	element = data[inIndex++];
	iArray[outindex++] = (element >> 4) & 0xf;
	iArray[outindex++] = element & 0xf;

	element = data[inIndex++];
	iArray[outindex++] = (element >> 4) & 0xf;
	iArray[outindex++] = element & 0xf;

	bitnum += 32;
	}
	break;
	}

	// Process final portion of scanline
	for (; i < w; i++) {
	int shift = shiftOffset - (bitnum & 7);
	iArray[outindex++] =
	bitMask & (data[index + (bitnum >> 3)] >> shift);
	bitnum += pixbits;
	}

	index += scanlineStride;
	}

	return iArray;
	}

	/**
	* Sets all samples for a rectangle of pixels from an int array containing
	* one sample per array element.
	* An ArrayIndexOutOfBoundsException may 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 Width of the pixel rectangle.
	* @param h Height of the pixel rectangle.
	* @param iArray The input int pixel array.
	*/
	public void setPixels(int x, int y, int w, int h, int iArray[]) {
	if ((x < this.minX) \|\| (y < this.minY) \|\|
	(x + w > this.maxX) \|\| (y + h > this.maxY)) {
	throw new ArrayIndexOutOfBoundsException
	("Coordinate out of bounds!");
	}
	int pixbits = pixelBitStride;
	int scanbit = dataBitOffset + (x - minX) * pixbits;
	int index = (y - minY) * scanlineStride;
	int outindex = 0;
	byte data[] = this.data;
	for (int j = 0; j < h; j++) {
	int bitnum = scanbit;
	int element;

	// Process initial portion of scanline
	int i = 0;
	while ((i < w) && ((bitnum & 7) != 0)) {
	int shift = shiftOffset - (bitnum & 7);
	element = data[index + (bitnum >> 3)];
	element &= ~(bitMask << shift);
	element \|= (iArray[outindex++] & bitMask) << shift;
	data[index + (bitnum >> 3)] = (byte)element;

	bitnum += pixbits;
	i++;
	}

	// Process central portion of scanline 8 pixels at a time
	int inIndex = index + (bitnum >> 3);
	switch (pixbits) {
	case 1:
	for (; i < w - 7; i += 8) {
	element = (iArray[outindex++] & 1) << 7;
	element \|= (iArray[outindex++] & 1) << 6;
	element \|= (iArray[outindex++] & 1) << 5;
	element \|= (iArray[outindex++] & 1) << 4;
	element \|= (iArray[outindex++] & 1) << 3;
	element \|= (iArray[outindex++] & 1) << 2;
	element \|= (iArray[outindex++] & 1) << 1;
	element \|= (iArray[outindex++] & 1);
	data[inIndex++] = (byte)element;

	bitnum += 8;
	}
	break;

	case 2:
	for (; i < w - 7; i += 8) {
	element = (iArray[outindex++] & 3) << 6;
	element \|= (iArray[outindex++] & 3) << 4;
	element \|= (iArray[outindex++] & 3) << 2;
	element \|= (iArray[outindex++] & 3);
	data[inIndex++] = (byte)element;

	element = (iArray[outindex++] & 3) << 6;
	element \|= (iArray[outindex++] & 3) << 4;
	element \|= (iArray[outindex++] & 3) << 2;
	element \|= (iArray[outindex++] & 3);
	data[inIndex++] = (byte)element;

	bitnum += 16;
	}
	break;

	case 4:
	for (; i < w - 7; i += 8) {
	element = (iArray[outindex++] & 0xf) << 4;
	element \|= (iArray[outindex++] & 0xf);
	data[inIndex++] = (byte)element;

	element = (iArray[outindex++] & 0xf) << 4;
	element \|= (iArray[outindex++] & 0xf);
	data[inIndex++] = (byte)element;

	element = (iArray[outindex++] & 0xf) << 4;
	element \|= (iArray[outindex++] & 0xf);
	data[inIndex++] = (byte)element;

	element = (iArray[outindex++] & 0xf) << 4;
	element \|= (iArray[outindex++] & 0xf);
	data[inIndex++] = (byte)element;

	bitnum += 32;
	}
	break;
	}

	// Process final portion of scanline
	for (; i < w; i++) {
	int shift = shiftOffset - (bitnum & 7);

	element = data[index + (bitnum >> 3)];
	element &= ~(bitMask << shift);
	element \|= (iArray[outindex++] & bitMask) << shift;
	data[index + (bitnum >> 3)] = (byte)element;

	bitnum += pixbits;
	}

	index += scanlineStride;
	}

	markDirty();
	}

	/**
	* Creates a subraster given a region of the raster. The x and y
	* coordinates specify the horizontal and vertical offsets
	* from the upper-left corner of this raster to the upper-left corner
	* of the subraster. Note that the subraster will reference the same
	* DataBuffer as the parent raster, but using different offsets. The
	* bandList is ignored.
	* @param x X offset.
	* @param y Y offset.
	* @param width Width (in pixels) of the subraster.
	* @param height Height (in pixels) of the subraster.
	* @param x0 Translated X origin of the subraster.
	* @param y0 Translated Y origin of the subraster.
	* @param bandList Array of band indices.
	* @exception RasterFormatException
	* if the specified bounding box is outside of the parent raster.
	*/
	public Raster createChild(int x, int y,
	int width, int height,
	int x0, int y0, int[] bandList) {
	WritableRaster newRaster = createWritableChild(x, y,
	width, height,
	x0, y0,
	bandList);
	return (Raster) newRaster;
	}

	/**
	* Creates a Writable subRaster given a region of the Raster. The x and y
	* coordinates specify the horizontal and vertical offsets
	* from the upper-left corner of this Raster to the upper-left corner
	* of the subRaster. The bandList is ignored.
	* A translation to the subRaster may also be specified.
	* Note that the subRaster will reference the same
	* DataBuffer as the parent Raster, but using different offsets.
	* @param x X offset.
	* @param y Y offset.
	* @param width Width (in pixels) of the subraster.
	* @param height Height (in pixels) of the subraster.
	* @param x0 Translated X origin of the subraster.
	* @param y0 Translated Y origin of the subraster.
	* @param bandList Array of band indices.
	* @exception RasterFormatException
	* if the specified bounding box is outside of the parent Raster.
	*/
	public WritableRaster createWritableChild(int x, int y,
	int width, int height,
	int x0, int y0,
	int[] bandList) {
	if (x < this.minX) {
	throw new RasterFormatException("x lies outside the raster");
	}
	if (y < this.minY) {
	throw new RasterFormatException("y lies outside the raster");
	}
	if ((x+width < x) \|\| (x+width > this.minX + this.width)) {
	throw new RasterFormatException("(x + width) is outside of Raster");
	}
	if ((y+height < y) \|\| (y+height > this.minY + this.height)) {
	throw new RasterFormatException("(y + height) is outside of Raster");
	}

	SampleModel sm;

	if (bandList != null) {
	sm = sampleModel.createSubsetSampleModel(bandList);
	}
	else {
	sm = sampleModel;
	}

	int deltaX = x0 - x;
	int deltaY = y0 - y;

	return new BytePackedRaster(sm,
	dataBuffer,
	new Rectangle(x0, y0, width, height),
	new Point(sampleModelTranslateX+deltaX,
	sampleModelTranslateY+deltaY),
	this);
	}

	/**
	* Creates a raster with the same layout but using a different
	* width and height, and with new zeroed data arrays.
	*/
	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 BytePackedRaster(sm, new Point(0,0));
	}

	/**
	* Creates a raster with the same layout and the same
	* width and height, and with new zeroed data arrays.
	*/
	public WritableRaster createCompatibleWritableRaster () {
	return createCompatibleWritableRaster(width,height);
	}

	/**
	* Verify that the layout parameters are consistent with
	* the data. If strictCheck
	* is false, this method will check for ArrayIndexOutOfBounds conditions.
	* If strictCheck is true, this method will check for additional error
	* conditions such as line wraparound (width of a line greater than
	* the scanline stride).
	* @return String Error string, if the layout is incompatible with
	* the data. Otherwise returns null.
	*/
	private void verify (boolean strictCheck) {
	// Make sure data for Raster is in a legal range
	if (dataBitOffset < 0) {
	throw new RasterFormatException("Data offsets must be >= 0");
	}

	/* Need to re-verify the dimensions since a sample model may be
	* specified to the constructor
	*/
	if (width <= 0 \|\| height <= 0 \|\|
	height > (Integer.MAX_VALUE / width))
	{
	throw new RasterFormatException("Invalid raster dimension");
	}


	/*
	* pixelBitstride was verified in constructor, so just make
	* sure that it is safe to multiply it by width.
	*/
	if ((width - 1) > Integer.MAX_VALUE / pixelBitStride) {
	throw new RasterFormatException("Invalid raster dimension");
	}

	if ((long)minX - sampleModelTranslateX < 0 \|\|
	(long)minY - sampleModelTranslateY < 0) {

	throw new RasterFormatException("Incorrect origin/translate: (" +
	minX + ", " + minY + ") / (" +
	sampleModelTranslateX + ", " + sampleModelTranslateY + ")");
	}

	if (scanlineStride < 0 \|\|
	scanlineStride > (Integer.MAX_VALUE / height))
	{
	throw new RasterFormatException("Invalid scanline stride");
	}

	if (height > 1 \|\| minY - sampleModelTranslateY > 0) {
	// buffer should contain at least one scanline
	if (scanlineStride > data.length) {
	throw new RasterFormatException("Incorrect scanline stride: "
	+ scanlineStride);
	}
	}

	long lastbit = (long) dataBitOffset
	+ (long) (height - 1) * (long) scanlineStride * 8
	+ (long) (width - 1) * (long) pixelBitStride
	+ (long) pixelBitStride - 1;
	if (lastbit < 0 \|\| lastbit / 8 >= data.length) {
	throw new RasterFormatException("raster dimensions overflow " +
	"array bounds");
	}
	if (strictCheck) {
	if (height > 1) {
	lastbit = width * pixelBitStride - 1;
	if (lastbit / 8 >= scanlineStride) {
	throw new RasterFormatException("data for adjacent" +
	" scanlines overlaps");
	}
	}
	}
	}

	public String toString() {
	return new String ("BytePackedRaster: width = "+width+" height = "+height
	+" #channels "+numBands
	+" xOff = "+sampleModelTranslateX
	+" yOff = "+sampleModelTranslateY);
	}
	}

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