* For example, if there is only one data element per pixel, a * SinglePixelPackedSampleModel can be used to represent multiple * bands with a PackedColorModel (including a DirectColorModel) for * color interpretation. * */ public class IntegerComponentRaster extends SunWritableRaster { static final int TYPE_CUSTOM = 0; static final int TYPE_BYTE_SAMPLES = 1; static final int TYPE_USHORT_SAMPLES = 2; static final int TYPE_INT_SAMPLES = 3; static final int TYPE_BYTE_BANDED_SAMPLES = 4; static final int TYPE_USHORT_BANDED_SAMPLES = 5; static final int TYPE_INT_BANDED_SAMPLES = 6; static final int TYPE_BYTE_PACKED_SAMPLES = 7; static final int TYPE_USHORT_PACKED_SAMPLES = 8; static final int TYPE_INT_PACKED_SAMPLES = 9; static final int TYPE_INT_8BIT_SAMPLES = 10; static final int TYPE_BYTE_BINARY_SAMPLES = 11; /** private band offset for use by native code */ protected int bandOffset; /** Data offsets for each band of image data. */ protected int[] dataOffsets; /** Scanline stride of the image data contained in this Raster. */ protected int scanlineStride; /** Pixel stride of the image data contained in this Raster. */ protected int pixelStride; /** The image data array. */ protected int[] data; /** The number of data elements required to store a pixel. */ protected int numDataElems; 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 IntegerComponentRaster 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 * SinglePixelPackedSampleModel. * @param sampleModel The SampleModel that specifies the layout. * @param origin The Point that specified the origin. */ public IntegerComponentRaster(SampleModel sampleModel, Point origin) { this(sampleModel, sampleModel.createDataBuffer(), new Rectangle(origin.x, origin.y, sampleModel.getWidth(), sampleModel.getHeight()), origin, null); } /** * Constructs a IntegerComponentRaster with the given SampleModel * and DataBuffer. The Raster's upper left corner is origin and * it is the same sizes the SampleModel. The DataBuffer is not * initialized and must be a DataBufferInt compatible with SampleModel. * SampleModel must be of type SinglePixelPackedSampleModel. * @param sampleModel The SampleModel that specifies the layout. * @param dataBuffer The DataBufferInt that contains the image data. * @param origin The Point that specifies the origin. */ public IntegerComponentRaster(SampleModel sampleModel, DataBuffer dataBuffer, Point origin) { this(sampleModel, dataBuffer, new Rectangle(origin.x, origin.y, sampleModel.getWidth(), sampleModel.getHeight()), origin, null); } /** * Constructs a IntegerComponentRaster with the given SampleModel, * DataBuffer, and parent. DataBuffer must be a DataBufferInt and * SampleModel must be of type SinglePixelPackedSampleModel. * When translated into the base Raster's * coordinate system, aRegion must be contained by the base Raster. * Origin is the coodinate 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 DataBufferInt 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. */ public IntegerComponentRaster(SampleModel sampleModel, DataBuffer dataBuffer, Rectangle aRegion, Point origin, IntegerComponentRaster parent){ super(sampleModel,dataBuffer,aRegion,origin,parent); this.maxX = minX + width; this.maxY = minY + height; if (!(dataBuffer instanceof DataBufferInt)) { throw new RasterFormatException("IntegerComponentRasters must have" + "integer DataBuffers"); } DataBufferInt dbi = (DataBufferInt)dataBuffer; if (dbi.getNumBanks() != 1) { throw new RasterFormatException("DataBuffer for IntegerComponentRasters"+ " must only have 1 bank."); } this.data = stealData(dbi, 0); if (sampleModel instanceof SinglePixelPackedSampleModel) { SinglePixelPackedSampleModel sppsm = (SinglePixelPackedSampleModel)sampleModel; int[] boffsets = sppsm.getBitOffsets(); boolean notByteBoundary = false; for (int i=1; i < boffsets.length; i++) { if ((boffsets[i]%8) != 0) { notByteBoundary = true; } } this.type = (notByteBoundary ? IntegerComponentRaster.TYPE_INT_PACKED_SAMPLES : IntegerComponentRaster.TYPE_INT_8BIT_SAMPLES); this.scanlineStride = sppsm.getScanlineStride(); this.pixelStride = 1; this.dataOffsets = new int[1]; this.dataOffsets[0] = dbi.getOffset(); this.bandOffset = this.dataOffsets[0]; int xOffset = aRegion.x - origin.x; int yOffset = aRegion.y - origin.y; dataOffsets[0] += xOffset+yOffset*scanlineStride; this.numDataElems = sppsm.getNumDataElements(); } else { throw new RasterFormatException("IntegerComponentRasters must have"+ " SinglePixelPackedSampleModel"); } verify(false); } /** * Returns a copy of the data offsets array. For each band the data offset * is the index into the band's data array, of the first sample of the * band. */ public int[] getDataOffsets() { return dataOffsets.clone(); } /** * Returns data offset for the specified band. The data offset * is the index into the data array in which the first sample * of the first scanline is stored. */ public int getDataOffset(int band) { return dataOffsets[band]; } /** * 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 stride -- the number of data array elements between two * samples for the same band on the same scanline. */ public int getPixelStride() { return pixelStride; } /** * Returns a reference to the data array. */ public int[] getDataStorage() { return data; } /** * Returns the data elements for all bands 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!"); } int outData[]; if (obj == null) { outData = new int[numDataElements]; } else { outData = (int[])obj; } int off = (y-minY)*scanlineStride + (x-minX)*pixelStride; for (int band = 0; band < numDataElements; band++) { outData[band] = data[dataOffsets[band] + off]; } return 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.
* int[] bandData = (int[])raster.getDataElements(x, y, w, h, null);
* int numDataElements = raster.getNumDataElements();
* int[] pixel = new int[numDataElements];
* // To find a data element at location (x2, y2)
* System.arraycopy(bandData, ((y2-y)*w + (x2-x))*numDataElements,
* pixel, 0, numDataElements);
*
* @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 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 request pixel data.
*/
public Object getDataElements(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!");
}
int outData[];
if (obj instanceof int[]) {
outData = (int[])obj;
} else {
outData = new int[numDataElements*w*h];
}
int yoff = (y-minY)*scanlineStride +
(x-minX)*pixelStride;
int xoff;
int off = 0;
int xstart;
int ystart;
for (ystart=0; ystart < h; ystart++, yoff += scanlineStride) {
xoff = yoff;
for (xstart=0; xstart < w; xstart++, xoff += pixelStride) {
for (int c = 0; c < numDataElements; c++) {
outData[off++] = data[dataOffsets[c] + xoff];
}
}
}
return outData;
}
/**
* Stores the data elements for all bands 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!");
}
int inData[] = (int[])obj;
int off = (y-minY)*scanlineStride +
(x-minX)*pixelStride;
for (int i = 0; i < numDataElements; i++) {
data[dataOffsets[i] + off] = inData[i];
}
markDirty();
}
/**
* Stores the Raster data at the specified location.
* The transferType of the inputRaster must match this raster.
* An ArrayIndexOutOfBoundsException 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) {
int dstOffX = x + inRaster.getMinX();
int dstOffY = y + inRaster.getMinY();
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, width, height, 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 width The number of pixels to store horizontally
* @param height The number of pixels to store vertically
* @param inRaster Raster of data to place at x,y location.
*/
private void setDataElements(int dstX, int dstY,
int width, int height,
Raster inRaster) {
// Assume bounds checking has been performed previously
if (width <= 0 || height <= 0) {
return;
}
// Write inRaster (minX, minY) to (dstX, dstY)
int srcOffX = inRaster.getMinX();
int srcOffY = inRaster.getMinY();
int tdata[] = null;
if (inRaster instanceof IntegerComponentRaster &&
(pixelStride == 1) && (numDataElements == 1)) {
IntegerComponentRaster ict = (IntegerComponentRaster) inRaster;
if (ict.getNumDataElements() != 1) {
throw new ArrayIndexOutOfBoundsException("Number of bands"+
" does not match");
}
// Extract the raster parameters
tdata = ict.getDataStorage();
int tss = ict.getScanlineStride();
int toff = ict.getDataOffset(0);
int srcOffset = toff;
int dstOffset = dataOffsets[0]+(dstY-minY)*scanlineStride+
(dstX-minX);
// Fastest case. We can copy scanlines
if (ict.getPixelStride() == pixelStride) {
width *= pixelStride;
// Loop through all of the scanlines and copy the data
for (int startY=0; startY < height; startY++) {
System.arraycopy(tdata, srcOffset, data, dstOffset, width);
srcOffset += tss;
dstOffset += scanlineStride;
}
markDirty();
return;
}
}
Object odata = null;
for (int startY=0; startY < height; startY++) {
odata = inRaster.getDataElements(srcOffX, srcOffY+startY,
width, 1, odata);
setDataElements(dstX, dstY+startY,
width, 1, odata);
}
}
/**
* 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
* for the nth band at location (x2, y2) would be found at:
*
* inData[((y2-y)*w + (x2-x))*numDataElements + n]
*
* @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 w*h*getNumDataElements()
* 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) {
if ((x < this.minX) || (y < this.minY) ||
(x + w > this.maxX) || (y + h > this.maxY)) {
throw new ArrayIndexOutOfBoundsException
("Coordinate out of bounds!");
}
int inData[] = (int[])obj;
int yoff = (y-minY)*scanlineStride +
(x-minX)*pixelStride;
int xoff;
int off = 0;
int xstart;
int ystart;
for (ystart=0; ystart < h; ystart++, yoff += scanlineStride) {
xoff = yoff;
for (xstart=0; xstart < w; xstart++, xoff += pixelStride) {
for (int c = 0; c < numDataElements; c++) {
data[dataOffsets[c] + xoff] = inData[off++];
}
}
}
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. A subset of the bands of the parent Raster may
* be specified. If this is null, then all the bands are present in the
* subRaster. 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 raster");
}
if (y < this.minY) {
throw new RasterFormatException("y lies outside raster");
}
if ((x+width < x) || (x+width > this.minX + this.width)) {
throw new RasterFormatException("(x + width) is outside raster");
}
if ((y+height < y) || (y+height > this.minY + this.height)) {
throw new RasterFormatException("(y + height) is outside raster");
}
SampleModel sm;
if (bandList != null)
sm = sampleModel.createSubsetSampleModel(bandList);
else
sm = sampleModel;
int deltaX = x0 - x;
int deltaY = y0 - y;
return new IntegerComponentRaster(sm,
dataBuffer,
new Rectangle(x0,y0,width,height),
new Point(sampleModelTranslateX+deltaX,
sampleModelTranslateY+deltaY),
this);
}
/**
* 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. A subset of the bands of the parent raster may
* be specified. If this is null, then all the bands are present in the
* subRaster. 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 Raster createChild (int x, int y,
int width, int height,
int x0, int y0,
int bandList[]) {
return createWritableChild(x, y, width, height, x0, y0, bandList);
}
/**
* Creates a raster with the same band 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 IntegerComponentRaster(sm, new Point(0,0));
}
/**
* Creates a raster with the same data layout and the same
* width and height, and with new zeroed data arrays. If
* the raster is a subraster, this will call
* createCompatibleRaster(width, height).
*/
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) {
if (dataOffsets[0] < 0) {
throw new RasterFormatException("Data offset ("+dataOffsets[0]+
") must be >= 0");
}
int maxSize = 0;
int size;
for (int i=0; i < numDataElements; i++) {
size = (height-1)*scanlineStride + (width-1)*pixelStride +
dataOffsets[i];
if (size > maxSize) {
maxSize = size;
}
}
if (data.length < maxSize) {
throw new RasterFormatException("Data array too small (should be "+
maxSize
+" but is "+data.length+" )");
}
}
public String toString() {
return new String ("IntegerComponentRaster: width = "+width
+" height = " + height
+" #Bands = " + numBands
+" #DataElements "+numDataElements
+" xOff = "+sampleModelTranslateX
+" yOff = "+sampleModelTranslateY
+" dataOffset[0] "+dataOffsets[0]);
}
// /**
// * For debugging... prints a region of a one-band IntegerComponentRaster
// */
// public void print(int x, int y, int w, int h) {
// // REMIND: Only works for 1 band!
// System.out.println(this);
// int offset = dataOffsets[0] + y*scanlineStride + x*pixelStride;
// int off;
// for (int yoff=0; yoff < h; yoff++, offset += scanlineStride) {
// off = offset;
// System.out.print("Line "+(sampleModelTranslateY+y+yoff)+": ");
// for (int xoff = 0; xoff < w; xoff++, off+= pixelStride) {
// System.out.print(Integer.toHexString(data[off])+" ");
// }
// System.out.println("");
// }
// }
}