File	Doc	Category	Size	Date	Package
MultiPixelPackedSampleModel.java	API Doc	Android 1.5 API	15382	Wed May 06 22:41:54 BST 2009	java.awt.image

MultiPixelPackedSampleModel

• java.lang.Object
  • java.awt.image.SampleModel

Fields Summary
private int	pixelBitStride The pixel bit stride.
private int	scanlineStride The scanline stride.
private int	dataBitOffset The data bit offset.
private int	bitMask The bit mask.
private int	dataElementSize The data element size.
private int	pixelsPerDataElement The pixels per data element.

Constructors Summary
public MultiPixelPackedSampleModel(int dataType, int w, int h, int numberOfBits, int scanlineStride, int dataBitOffset) Instantiates a new MultiPixelPackedSampleModel with the specified parameters. param dataType the data type of the samples. param w the width of the image data. param h the height of the image data. param numberOfBits the number of bits per pixel. param scanlineStride the scanline stride of the of the image data. param dataBitOffset the array of the band offsets. super(dataType, w, h, 1); if (dataType != DataBuffer.TYPE_BYTE && dataType != DataBuffer.TYPE_USHORT && dataType != DataBuffer.TYPE_INT) { // awt.61=Unsupported data type: {0} throw new IllegalArgumentException(Messages.getString("awt.61", //$NON-NLS-1$ dataType)); } this.scanlineStride = scanlineStride; if (numberOfBits == 0) { // awt.20C=Number of Bits equals to zero throw new RasterFormatException(Messages.getString("awt.20C")); //$NON-NLS-1$ } this.pixelBitStride = numberOfBits; this.dataElementSize = DataBuffer.getDataTypeSize(dataType); if (dataElementSize % pixelBitStride != 0) { // awt.20D=The number of bits per pixel is not a power of 2 or // pixels span data element boundaries throw new RasterFormatException(Messages.getString("awt.20D")); //$NON-NLS-1$ } if (dataBitOffset % numberOfBits != 0) { // awt.20E=Data Bit offset is not a multiple of pixel bit stride throw new RasterFormatException(Messages.getString("awt.20E")); //$NON-NLS-1$ } this.dataBitOffset = dataBitOffset; this.pixelsPerDataElement = dataElementSize / pixelBitStride; this.bitMask = (1 << numberOfBits) - 1;
public MultiPixelPackedSampleModel(int dataType, int w, int h, int numberOfBits) Instantiates a new MultiPixelPackedSampleModel with the specified parameters. param dataType the data type of the samples. param w the width of the image data. param h the height of the image data. param numberOfBits the number of bits per pixel. this(dataType, w, h, numberOfBits, (numberOfBits * w + DataBuffer.getDataTypeSize(dataType) - 1) / DataBuffer.getDataTypeSize(dataType), 0);

Methods Summary
public java.awt.image.SampleModel	createCompatibleSampleModel(int w, int h) return new MultiPixelPackedSampleModel(dataType, w, h, pixelBitStride);
public java.awt.image.DataBuffer	createDataBuffer() DataBuffer dataBuffer = null; int size = scanlineStride * height; switch (dataType) { case DataBuffer.TYPE_BYTE: dataBuffer = new DataBufferByte(size + (dataBitOffset + 7) / 8); break; case DataBuffer.TYPE_USHORT: dataBuffer = new DataBufferUShort(size + (dataBitOffset + 15) / 16); break; case DataBuffer.TYPE_INT: dataBuffer = new DataBufferInt(size + (dataBitOffset + 31) / 32); break; } return dataBuffer;
public java.awt.image.SampleModel	createSubsetSampleModel(int[] bands) if (bands != null && bands.length != 1) { // awt.20F=Number of bands must be only 1 throw new RasterFormatException(Messages.getString("awt.20F")); //$NON-NLS-1$ } return createCompatibleSampleModel(width, height);
public boolean	equals(java.lang.Object o) Compares this MultiPixelPackedSampleModel object with the specified object. param o the Object to be compared. return true, if the object is a MultiPixelPackedSampleModel with the same data parameter values as this MultiPixelPackedSampleModel, false otherwise. if ((o == null) || !(o instanceof MultiPixelPackedSampleModel)) { return false; } MultiPixelPackedSampleModel model = (MultiPixelPackedSampleModel)o; return this.width == model.width && this.height == model.height && this.numBands == model.numBands && this.dataType == model.dataType && this.pixelBitStride == model.pixelBitStride && this.bitMask == model.bitMask && this.pixelsPerDataElement == model.pixelsPerDataElement && this.dataElementSize == model.dataElementSize && this.dataBitOffset == model.dataBitOffset && this.scanlineStride == model.scanlineStride;
public int	getBitOffset(int x) Gets the bit offset in the data element which is stored for the specified pixel of a scanline. param x the pixel. return the bit offset of the pixel in the data element. return (x * pixelBitStride + dataBitOffset) % dataElementSize;
public int	getDataBitOffset() Gets the data bit offset. return the data bit offset. return dataBitOffset;
public java.lang.Object	getDataElements(int x, int y, java.lang.Object obj, java.awt.image.DataBuffer data) if (x < 0 || y < 0 || x >= this.width || y >= this.height) { // awt.63=Coordinates are not in bounds throw new ArrayIndexOutOfBoundsException(Messages.getString("awt.63")); //$NON-NLS-1$ } switch (getTransferType()) { case DataBuffer.TYPE_BYTE: byte bdata[]; if (obj == null) { bdata = new byte[1]; } else { bdata = (byte[])obj; } bdata[0] = (byte)getSample(x, y, 0, data); obj = bdata; break; case DataBuffer.TYPE_USHORT: short sdata[]; if (obj == null) { sdata = new short[1]; } else { sdata = (short[])obj; } sdata[0] = (short)getSample(x, y, 0, data); obj = sdata; break; case DataBuffer.TYPE_INT: int idata[]; if (obj == null) { idata = new int[1]; } else { idata = (int[])obj; } idata[0] = getSample(x, y, 0, data); obj = idata; break; } return obj;
public int	getNumDataElements() return 1;
public int	getOffset(int x, int y) Gets the offset of the specified pixel in the data array. param x the X coordinate of the specified pixel. param y the Y coordinate of the specified pixel. return the offset of the specified pixel. return y * scanlineStride + (x * pixelBitStride + dataBitOffset) / dataElementSize;
public int[]	getPixel(int x, int y, int[] iArray, java.awt.image.DataBuffer data) if (x < 0 || y < 0 || x >= this.width || y >= this.height) { // awt.63=Coordinates are not in bounds throw new ArrayIndexOutOfBoundsException(Messages.getString("awt.63")); //$NON-NLS-1$ } int pixel[]; if (iArray == null) { pixel = new int[numBands]; } else { pixel = iArray; } pixel[0] = getSample(x, y, 0, data); return pixel;
public int	getPixelBitStride() Gets the pixel bit stride of this MultiPixelPackedSampleModel. return the pixel bit stride of this MultiPixelPackedSampleModel. return pixelBitStride;
public int	getSample(int x, int y, int b, java.awt.image.DataBuffer data) if (x < 0 || y < 0 || x >= this.width || y >= this.height || b != 0) { // awt.63=Coordinates are not in bounds throw new ArrayIndexOutOfBoundsException(Messages.getString("awt.63")); //$NON-NLS-1$ } int bitnum = dataBitOffset + x * pixelBitStride; int elem = data.getElem(y * scanlineStride + bitnum / dataElementSize); int shift = dataElementSize - (bitnum & (dataElementSize - 1)) - pixelBitStride; return (elem >> shift) & bitMask;
public int	getSampleSize(int band) return pixelBitStride;
public int[]	getSampleSize() int sampleSizes[] = { pixelBitStride }; return sampleSizes;
public int	getScanlineStride() Gets the scanline stride of this MultiPixelPackedSampleModel. return the scanline stride of this MultiPixelPackedSampleModel. return scanlineStride;
public int	getTransferType() if (pixelBitStride > 16) { return DataBuffer.TYPE_INT; } else if (pixelBitStride > 8) { return DataBuffer.TYPE_USHORT; } else { return DataBuffer.TYPE_BYTE; }
public int	hashCode() Returns a hash code of this MultiPixelPackedSampleModel class. return the hash code of this MultiPixelPackedSampleModel class. int hash = 0; int tmp = 0; hash = width; tmp = hash >>> 24; hash <<= 8; hash |= tmp; hash ^= height; tmp = hash >>> 24; hash <<= 8; hash |= tmp; hash ^= numBands; tmp = hash >>> 24; hash <<= 8; hash |= tmp; hash ^= dataType; tmp = hash >>> 24; hash <<= 8; hash |= tmp; hash ^= scanlineStride; tmp = hash >>> 24; hash <<= 8; hash |= tmp; hash ^= pixelBitStride; tmp = hash >>> 24; hash <<= 8; hash |= tmp; hash ^= dataBitOffset; tmp = hash >>> 24; hash <<= 8; hash |= tmp; hash ^= bitMask; tmp = hash >>> 24; hash <<= 8; hash |= tmp; hash ^= dataElementSize; tmp = hash >>> 24; hash <<= 8; hash |= tmp; hash ^= pixelsPerDataElement; return hash;
public void	setDataElements(int x, int y, java.lang.Object obj, java.awt.image.DataBuffer data) setSample(x, y, obj, data, 1, 0);
public void	setPixel(int x, int y, int[] iArray, java.awt.image.DataBuffer data) setSample(x, y, iArray, data, 2, 0);
public void	setSample(int x, int y, int b, int s, java.awt.image.DataBuffer data) if (b != 0) { // awt.63=Coordinates are not in bounds throw new ArrayIndexOutOfBoundsException(Messages.getString("awt.63")); //$NON-NLS-1$ } setSample(x, y, null, data, 3, s);
private void	setSample(int x, int y, java.lang.Object obj, java.awt.image.DataBuffer data, int methodId, int s) This method is used by other methods of this class. The behavior of this method depends on the method which has been invoke this one. The argument methodId is used to choose valid behavior in a particular case. If methodId is equal to 1 it means that this method has been invoked by the setDataElements() method, 2 - means setPixel(), and setSample() in any other cases. param x the x. param y the y. param obj the obj. param data the data. param methodId the method id. param s the s. if ((x < 0) || (y < 0) || (x >= this.width) || (y >= this.height)) { // awt.63=Coordinates are not in bounds throw new ArrayIndexOutOfBoundsException(Messages.getString("awt.63")); //$NON-NLS-1$ } final int bitnum = dataBitOffset + x * pixelBitStride; final int idx = y * scanlineStride + bitnum / dataElementSize; final int shift = dataElementSize - (bitnum & (dataElementSize - 1)) - pixelBitStride; final int mask = ~(bitMask << shift); int elem = data.getElem(idx); switch (methodId) { case 1: { // Invoked from setDataElements() switch (getTransferType()) { case DataBuffer.TYPE_BYTE: s = ((byte[])obj)[0] & 0xff; break; case DataBuffer.TYPE_USHORT: s = ((short[])obj)[0] & 0xffff; break; case DataBuffer.TYPE_INT: s = ((int[])obj)[0]; break; } break; } case 2: { // Invoked from setPixel() s = ((int[])obj)[0]; break; } } elem &= mask; elem |= (s & bitMask) << shift; data.setElem(idx, elem);