Package org.loboevolution.pdfview.function

Class FunctionType0

java.lang.Object

org.loboevolution.pdfview.function.PDFFunction

org.loboevolution.pdfview.function.FunctionType0

public class FunctionType0
extends PDFFunction

A sampled function maps input values to output values by interpolating along a line or cubic between two known values.

Field Summary

Fields

Modifier and Type	Field	Description
protected static final int	CUBIC_INTERPOLATION	Constant CUBIC_INTERPOLATION=3
protected static final int	LINEAR_INTERPOLATION	the valid interpolation methods

Fields inherited from class org.loboevolution.pdfview.function.PDFFunction

TYPE_0, TYPE_2, TYPE_3, TYPE_4

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	FunctionType0()	Creates a new instance of FunctionType0

Method Summary

Modifier and Type	Method	Description
protected void	doFunction(float[] inputs, int inputOffset, float[] outputs, int outputOffset)	Subclasses must implement this method to perform the actual function on the given set of data.
protected int	getBitsPerSample()	Get the number of bits per sample
protected float	getDecode(int i)	Get the decoding for a particular input parameter
protected float	getEncode(int i)	Get the encoding for a particular input parameter
protected int	getOrder()	Get the interpolation type
protected int	getSample(int[] values, int od)	Get a component for a sample given m indices and output dimension.
protected int	getSize(int dimension)	Get the size of a given input dimension
protected void	parse(PDFObject obj)	Read the function information from a PDF Object
protected void	setBitsPerSample(int bits)	Set the number of bits per sample
protected void	setDecode(float[] decode)	Set the decode array
protected void	setEncode(float[] encode)	Set the encode array
protected void	setOrder(int order)	Set the interpolation type
protected void	setSamples(int[][] samples)	Set the table of samples
protected void	setSize(int[] size)	Set the size of all input dimensions

Methods inherited from class org.loboevolution.pdfview.function.PDFFunction

calculate, calculate, getDomain, getFunction, getNumInputs, getNumOutputs, getRange, interpolate

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Details

LINEAR_INTERPOLATION

protected static final int LINEAR_INTERPOLATION

the valid interpolation methods

See Also:

• Constant Field Values

CUBIC_INTERPOLATION

protected static final int CUBIC_INTERPOLATION

Constant CUBIC_INTERPOLATION=3

See Also:

• Constant Field Values

Constructor Details

FunctionType0

protected FunctionType0()

Creates a new instance of FunctionType0

Method Details

parse

protected void parse(PDFObject obj)
              throws IOException

Read the function information from a PDF Object

Read the function information from a PDF Object

Specified by:

parse in class PDFFunction

Parameters:

obj - a PDFObject object.

Throws:

IOException - if any.

doFunction

protected void doFunction(float[] inputs,
 int inputOffset,
 float[] outputs,
 int outputOffset)

Subclasses must implement this method to perform the actual function on the given set of data. Note that the inputs are guaranteed to be clipped to the domain, while the outputs will be automatically clipped to the range after being returned from this function.

Map from m input values to n output values. The number of inputs m must be exactly one half the size of the domain. The number of outputs should match one half the size of the range.

Specified by:

doFunction in class PDFFunction

Parameters:

inputs - an array of

invalid reference

float

objects.

inputOffset - the offset into the inputs array to read from

outputs - guaranteed to be at least as big as getNumOutputs(), but not yet clipped to domain

outputOffset - the offset into the output array to write to

getSize

protected int getSize(int dimension)

Get the size of a given input dimension

Parameters:

dimension - the input dimension to get the size of

Returns:

the number of samples in the given dimension

setSize

protected void setSize(int[] size)

Set the size of all input dimensions

Parameters:

size - an array of

invalid reference

int

objects.

getBitsPerSample

protected int getBitsPerSample()

Get the number of bits per sample

Returns:

a Integer object.

setBitsPerSample

protected void setBitsPerSample(int bits)

Set the number of bits per sample

Parameters:

bits - a Integer object.

getOrder

protected int getOrder()

Get the interpolation type

Returns:

a Integer object.

setOrder

protected void setOrder(int order)

Set the interpolation type

Parameters:

order - a Integer object.

getEncode

protected float getEncode(int i)

Get the encoding for a particular input parameter

Parameters:

i - the index into the encoding array, which has size 2 * m. the ith entry in the array has index 2i, 2i + 1

Returns:

the encoding value if the encoding array is set, or the default

setEncode

protected void setEncode(float[] encode)

Set the encode array

Parameters:

encode - an array of

invalid reference

float

objects.

getDecode

protected float getDecode(int i)

Get the decoding for a particular input parameter

Parameters:

i - the index into the decoding array, which has size 2 * n. the ith entry in the array has index 2i, 2i + 1

Returns:

the decoding value if the decoding array is set, or the default

setDecode

protected void setDecode(float[] decode)

Set the decode array

Parameters:

decode - an array of

invalid reference

float

objects.

getSample

protected int getSample(int[] values,
 int od)

Get a component for a sample given m indices and output dimension.

Parameters:

values - an array of m values determining which sample to select

od - the output dimension (0 - n) to get the sample in

Returns:

the sample for the given values and index

setSamples

protected void setSamples(int[][] samples)

Set the table of samples

Parameters:

samples - an array of

invalid reference

int

objects.