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java.lang.Object
|
+--java.awt.image.SampleModel
|
+--java.awt.image.ComponentSampleModel
|
+--javax.media.jai.ComponentSampleModelJAI
This class represents image data which is stored such that each sample
of a pixel occupies one data element of the DataBuffer. It stores the
N samples which make up a pixel in N separate data array elements.
Different bands may be in different banks of the DataBuffer.
Accessor methods are provided so that image data can be manipulated
directly. This class can support different kinds of interleaving, e.g.
band interleaving, scanline interleaving, and pixel interleaving.
Pixel stride is the number of data array elements between two samples
for the same band on the same scanline. Scanline stride is the number
of data array elements between a given sample and the corresponding sample
in the same column of the next scanline. Band offsets denote the number
of data array elements from the first data array element of the bank
of the DataBuffer holding each band to the first sample of the band.
The bands are numbered from 0 to N-1. This class can represent image
data for the dataTypes enumerated in java.awt.image.DataBuffer (all
samples of a given ComponentSampleModel are stored with the same precision)
. This class adds support for Double and Float data types in addition
to those supported by the ComponentSampleModel class in Java 2D.
All strides and offsets must be non-negative.
ComponentSampleModel| Fields inherited from class java.awt.image.ComponentSampleModel |
bandOffsets,
bankIndices,
numBands,
numBanks,
pixelStride,
scanlineStride |
| Fields inherited from class java.awt.image.SampleModel |
dataType,
height,
width |
| Constructor Summary | |
ComponentSampleModelJAI(int dataType,
int w,
int h,
int pixelStride,
int scanlineStride,
int[] bandOffsets)
Constructs a ComponentSampleModel with the specified
parameters. |
|
ComponentSampleModelJAI(int dataType,
int w,
int h,
int pixelStride,
int scanlineStride,
int[] bankIndices,
int[] bandOffsets)
Constructs a ComponentSampleModel with the specified
parameters. |
|
| Method Summary | |
SampleModel |
createCompatibleSampleModel(int w,
int h)
Creates a new ComponentSampleModel with the specified
width and height. |
DataBuffer |
createDataBuffer()
Creates a DataBuffer that corresponds to this ComponentSampleModel. |
SampleModel |
createSubsetSampleModel(int[] bands)
This creates a new ComponentSampleModel with a subset of the bands
of this ComponentSampleModel. |
Object |
getDataElements(int x,
int y,
int w,
int h,
Object obj,
DataBuffer data)
Returns the pixel data for the specified rectangle of pixels in a primitive array of type TransferType. |
Object |
getDataElements(int x,
int y,
Object obj,
DataBuffer data)
Returns data for a single pixel in a primitive array of type TransferType. |
double[] |
getPixels(int x,
int y,
int w,
int h,
double[] dArray,
DataBuffer data)
Returns all samples for a rectangle of pixels in a double
array, one sample per array element. |
double |
getSampleDouble(int x,
int y,
int b,
DataBuffer data)
Returns the sample in a specified band for a pixel located at (x,y) as a double. |
float |
getSampleFloat(int x,
int y,
int b,
DataBuffer data)
Returns the sample in a specified band for the pixel located at (x,y) as a float. |
void |
setDataElements(int x,
int y,
int w,
int h,
Object obj,
DataBuffer data)
Sets the data for a rectangle of pixels in the specified DataBuffer
from a primitive array of type TransferType. |
void |
setDataElements(int x,
int y,
Object obj,
DataBuffer data)
Sets the data for a single pixel in the specified DataBuffer from a
primitive array of type TransferType. |
void |
setSample(int x,
int y,
int b,
double s,
DataBuffer data)
Sets a sample in the specified band for the pixel located at (x,y) in the DataBuffer using a double for input. |
void |
setSample(int x,
int y,
int b,
float s,
DataBuffer data)
Sets a sample in the specified band for the pixel located at (x,y) in the DataBuffer using a float for input. |
String |
toString()
Returns a String containing the values of all valid fields. |
| Methods inherited from class java.awt.image.ComponentSampleModel |
getBandOffsets,
getBankIndices,
getNumDataElements,
getOffset,
getOffset,
getPixel,
getPixels,
getPixelStride,
getSample,
getSamples,
getSampleSize,
getSampleSize,
getScanlineStride,
setPixel,
setPixels,
setSample,
setSamples |
| Methods inherited from class java.awt.image.SampleModel |
getDataType,
getHeight,
getNumBands,
getPixel,
getPixel,
getPixels,
getSamples,
getSamples,
getTransferType,
getWidth,
setPixel,
setPixel,
setPixels,
setPixels,
setSamples,
setSamples |
| Methods inherited from class java.lang.Object |
clone,
equals,
finalize,
getClass,
hashCode,
notify,
notifyAll,
wait,
wait,
wait |
| Constructor Detail |
public ComponentSampleModelJAI(int dataType,
int w,
int h,
int pixelStride,
int scanlineStride,
int[] bandOffsets)
ComponentSampleModel with the specified
parameters. The number of bands will be given by the length of
the bandOffsets array. All bands will be stored in the first
bank of the DataBuffer.dataType - The data type for storing samples.w - The width (in pixels) of the region of
image data described.h - The height (in pixels) of the region of
image data described.pixelStride - The pixel stride of the region of image
data described.scanlineStride - The line stride of the region of image
data described.bandOffsets - The offsets of all bands.
public ComponentSampleModelJAI(int dataType,
int w,
int h,
int pixelStride,
int scanlineStride,
int[] bankIndices,
int[] bandOffsets)
ComponentSampleModel with the specified
parameters. The number of bands will be given by the length of
the bandOffsets array. Different bands may be stored in
different banks of the DataBuffer.dataType - The data type for storing samples.w - The width (in pixels) of the region of
image data described.h - The height (in pixels) of the region of
image data described.pixelStride - The pixel stride of the region of image
data described.scanlineStride - The line stride of the region of image
data described.bankIndices - The bank indices of all bands.bandOffsets - The band offsets of all bands.| Method Detail |
public SampleModel createCompatibleSampleModel(int w,
int h)
ComponentSampleModel with the specified
width and height. The new SampleModel will have the same
number of bands, storage data type, interleaving scheme, and
pixel stride as this SampleModel.w - The width in pixels.h - The height in pixelspublic SampleModel createSubsetSampleModel(int[] bands)
ComponentSampleModel with a subset of the bands
of this ComponentSampleModel. The new ComponentSampleModel can be
used with any DataBuffer that the existing ComponentSampleModel
can be used with. The new ComponentSampleModel/DataBuffer
combination will represent an image with a subset of the bands
of the original ComponentSampleModel/DataBuffer combination.bands - subset of bands of this ComponentSampleModelpublic DataBuffer createDataBuffer()
DataBuffer that corresponds to this ComponentSampleModel.
The DataBuffer's data type, number of banks, and size
will be consistent with this ComponentSampleModel.
public Object getDataElements(int x,
int y,
Object obj,
DataBuffer data)
ComponentSampleModel, this will be the same
as the data type, and samples will be returned one per array
element. Generally, obj
should be passed in as null, so that the Object will be created
automatically and will be of the right primitive data type.
The following code illustrates transferring data for one pixel from
DataBuffer db1, whose storage layout is described by
ComponentSampleModel csm1, to DataBuffer db2,
whose storage layout is described by
ComponentSampleModel csm2.
The transfer will generally be more efficient than using
getPixel/setPixel.
ComponentSampleModel csm1, csm2;
DataBufferInt db1, db2;
csm2.setDataElements(x, y,
csm1.getDataElements(x, y, null, db1), db2);
Using getDataElements/setDataElements to transfer between two
DataBuffer/SampleModel pairs is legitimate if the SampleModels have
the same number of bands, corresponding bands have the same number of
bits per sample, and the TransferTypes are the same.
x - The X coordinate of the pixel location.y - The Y coordinate of the pixel location.obj - If non-null, a primitive array in which to return
the pixel data.data - The DataBuffer containing the image data.ClassCastException - if obj is non-null and is not
a primitive array of type TransferType.ArrayIndexOutOfBoundsException - if the coordinates
are not in bounds, or if obj is non-null and is not large
enough to hold the pixel data.
public Object getDataElements(int x,
int y,
int w,
int h,
Object obj,
DataBuffer data)
Object will be created automatically and will be of the right
primitive data type.
The following code illustrates transferring data for a rectangular
region of pixels from
DataBuffer db1, whose storage layout is described by
SampleModel sm1, to DataBuffer db2, whose
storage layout is described by SampleModel sm2.
The transfer will generally be more efficient than using
getPixels/setPixels.
SampleModel sm1, sm2;
DataBuffer db1, db2;
sm2.setDataElements(x, y, w, h, sm1.getDataElements(x, y, w,
h, null, db1), db2);
Using getDataElements/setDataElements to transfer between two
DataBuffer/SampleModel pairs is legitimate if the SampleModels have
the same number of bands, corresponding bands have the same number of
bits per sample, and the TransferTypes are the same.
x - The minimum X coordinate of the pixel rectangle.y - The minimum Y coordinate of the pixel rectangle.w - The width of the pixel rectangle.h - The height of the pixel rectangle.obj - If non-null, a primitive array in which to return
the pixel data.data - The DataBuffer containing the image data.ClassCastException - if obj is non-null and is not
a primitive array of type TransferType.ArrayIndexOutOfBoundsException - if the coordinates
are not in bounds, or if obj is non-null and is not large
enough to hold the pixel data.ComponentSampleModel.getNumDataElements(),
SampleModel.getTransferType(),
DataBuffer
public void setDataElements(int x,
int y,
Object obj,
DataBuffer data)
DataBuffer from a
primitive array of type TransferType. For a ComponentSampleModel,
this will be the same as the data type, and samples are transferred
one per array element.
The following code illustrates transferring data for one pixel from
DataBuffer db1, whose storage layout is described by
ComponentSampleModel csm1, to DataBuffer db2,
whose storage layout is described by
ComponentSampleModel csm2.
The transfer will generally be more efficient than using
getPixel/setPixel.
ComponentSampleModel csm1, csm2;
DataBufferInt db1, db2;
csm2.setDataElements(x, y, csm1.getDataElements(x, y, null, db1),
db2);
Using getDataElements/setDataElements to transfer between two
DataBuffer/SampleModel pairs is legitimate if the SampleModels have
the same number of bands, corresponding bands have the same number of
bits per sample, and the TransferTypes are the same.
x - The X coordinate of the pixel location.y - The Y coordinate of the pixel location.obj - A primitive array containing pixel data.data - The DataBuffer containing the image data.ClassCastException - if obj is non-null and is not
a primitive array of type TransferType.ArrayIndexOutOfBoundsException - if the coordinates
are not in bounds, or if obj is non-null and is not large
enough to hold the pixel data.
public void setDataElements(int x,
int y,
int w,
int h,
Object obj,
DataBuffer data)
DataBuffer
from a primitive array of type TransferType. For image data supported
by the Java 2D API, this will be one of the dataTypes supported by
java.awt.image.DataBuffer. Data in the array may be in a packed
format, thus increasing efficiency for data transfers.
The following code illustrates transferring data for a rectangular
region of pixels from
DataBuffer db1, whose storage layout is described by
SampleModel sm1, to DataBuffer db2, whose
storage layout is described by SampleModel sm2.
The transfer will generally be more efficient than using
getPixels/setPixels.
SampleModel sm1, sm2;
DataBuffer db1, db2;
sm2.setDataElements(x, y, w, h, sm1.getDataElements(x, y, w, h,
null, db1), db2);
Using getDataElements/setDataElements to transfer between two
DataBuffer/SampleModel pairs is legitimate if the SampleModels have
the same number of bands, corresponding bands have the same number of
bits per sample, and the TransferTypes are the same.
x - The minimum X coordinate of the pixel rectangle.y - The minimum Y coordinate of the pixel rectangle.w - The width of the pixel rectangle.h - The height of the pixel rectangle.obj - A primitive array containing pixel data.data - The DataBuffer containing the image data.ClassCastException - if obj is non-null and is not
a primitive array of type TransferType.ArrayIndexOutOfBoundsException - if the coordinates
are not in bounds, or if obj is non-null and is not large
enough to hold the pixel data.ComponentSampleModel.getNumDataElements(),
SampleModel.getTransferType(),
DataBuffer
public void setSample(int x,
int y,
int b,
float s,
DataBuffer data)
DataBuffer using a float for input.
ArrayIndexOutOfBoundsException may be thrown if the coordinates are
not in bounds.x - The X coordinate of the pixel location.y - The Y coordinate of the pixel location.b - The band to set.s - The input sample as a float.data - The DataBuffer containing the image data.ArrayIndexOutOfBoundsException - if coordinates are not in bounds
public float getSampleFloat(int x,
int y,
int b,
DataBuffer data)
float.
ArrayIndexOutOfBoundsException may be thrown if the coordinates are
not in bounds.x - The X coordinate of the pixel location.y - The Y coordinate of the pixel location.b - The band to return.data - The DataBuffer containing the image data.ArrayIndexOutOfBoundsException - if coordinates are not in bounds
public void setSample(int x,
int y,
int b,
double s,
DataBuffer data)
DataBuffer using a double for input.
ArrayIndexOutOfBoundsException may be thrown if the coordinates are
not in bounds.x - The X coordinate of the pixel location.y - The Y coordinate of the pixel location.b - The band to set.s - The input sample as a double.data - The DataBuffer containing the image data.ArrayIndexOutOfBoundsException - if coordinates are not in bounds
public double getSampleDouble(int x,
int y,
int b,
DataBuffer data)
double.
ArrayIndexOutOfBoundsException may be thrown if the coordinates are
not in bounds.x - The X coordinate of the pixel location.y - The Y coordinate of the pixel location.b - The band to return.data - The DataBuffer containing the image data.double sample valueArrayIndexOutOfBoundsException - if coordinates are not in bounds
public double[] getPixels(int x,
int y,
int w,
int h,
double[] dArray,
DataBuffer data)
double
array, one sample per array element.
ArrayIndexOutOfBoundsException may be thrown if the coordinates are
not in bounds.x - The X coordinate of the upper left pixel location.y - The Y coordinate of the upper left pixel location.w - The width of the pixel rectangle.h - The height of the pixel rectangle.dArray - If non-null, returns the samples in this array.data - The DataBuffer containing the image data.ArrayIndexOutOfBoundsException - if coordinates are not in boundspublic String toString()
String containing the values of all valid fields.
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