com.itextpdf.kernel.pdf.function

Class PdfType2Function

java.lang.Object

com.itextpdf.kernel.pdf.PdfObjectWrapper

com.itextpdf.kernel.pdf.function.AbstractPdfFunction<PdfDictionary>

com.itextpdf.kernel.pdf.function.PdfType2Function

All Implemented Interfaces:

IPdfFunction

public class PdfType2Function
extends AbstractPdfFunction<PdfDictionary>

This class represents Pdf type 2 function that defines an exponential interpolation of one input value to n output values.

For more info see ISO 32000-1, section 7.10.3 "Type 2 (Exponential Interpolation) Functions".

Constructor Summary

Constructors

Constructor and Description
PdfType2Function(double[] domain, double[] range, double[] c0, double[] c1, int n)
PdfType2Function(PdfDictionary dict) Instantiates a new PdfType2Function instance based on passed PdfDictionary instance.

Method Summary

Modifier and Type	Method and Description
double[]	calculate(double[] input) Calculates one set of input components to one set of output components.
double[]	getC0() Gets values of C0 array.
double[]	getC1() Gets values of C1 array.
double	getN() Gets value of N field.
int	getOutputSize() Gets output size of function.
protected boolean	isWrappedObjectMustBeIndirect() Defines if the object behind this wrapper must be an indirect object in the resultant document.
void	setC0(double[] value) Sets values of C0 array.
void	setC1(double[] value) Sets values of C1 array.
void	setN(int value) sets value of N field.

Methods inherited from class com.itextpdf.kernel.pdf.function.AbstractPdfFunction

calculateFromByteArray, calculateFromByteArray, checkCompatibilityWithColorSpace, clip, clipInput, clipOutput, getAsPdfObject, getDomain, getFunctionType, getInputSize, getRange, normalize, setDomain, setRange

Methods inherited from class com.itextpdf.kernel.pdf.PdfObjectWrapper

ensureObjectIsAddedToDocument, ensureUnderlyingObjectHasIndirectReference, flush, getPdfObject, isFlushed, makeIndirect, makeIndirect, markObjectAsIndirect, setForbidRelease, setModified, setPdfObject, unsetForbidRelease

Methods inherited from class java.lang.Object

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

Constructor Detail

PdfType2Function

public PdfType2Function(PdfDictionary dict)

Instantiates a new PdfType2Function instance based on passed PdfDictionary instance.

Parameters:

dict - the function dictionary

PdfType2Function

public PdfType2Function(double[] domain,
                        double[] range,
                        double[] c0,
                        double[] c1,
                        int n)

Method Detail

calculate

public double[] calculate(double[] input)

Description copied from interface: IPdfFunction

Calculates one set of input components to one set of output components.

Parameters:

input - The input values size must contain IPdfFunction.getInputSize() items

Returns:

an array the size of IPdfFunction.getOutputSize() items containing the result

getOutputSize

public final int getOutputSize()

Gets output size of function.

If Range field is absent, the size of C0 array will be returned.

Specified by:

getOutputSize in interface IPdfFunction

Overrides:

getOutputSize in class AbstractPdfFunction<PdfDictionary>

Returns:

output size of function

getC0

public final double[] getC0()

Gets values of C0 array.

Returns:

the values of C0 array

setC0

public final void setC0(double[] value)

Sets values of C0 array.

Parameters:

value - the values of C0 array

getC1

public final double[] getC1()

Gets values of C1 array.

Returns:

the values of C1 array

setC1

public final void setC1(double[] value)

Sets values of C1 array.

Parameters:

value - the values of C1 array

getN

public final double getN()

Gets value of N field.

Returns:

the value of N field

setN

public final void setN(int value)

sets value of N field.

Parameters:

value - the value of N field

isWrappedObjectMustBeIndirect

protected boolean isWrappedObjectMustBeIndirect()

Description copied from class: PdfObjectWrapper

Defines if the object behind this wrapper must be an indirect object in the resultant document.

If this method returns true it doesn't necessarily mean that object must be in the indirect state at any moment, but rather defines that when the object will be written to the document it will be transformed into indirect object if it's not indirect yet.

Return value of this method shouldn't depend on any logic, it should return always true or false.

Specified by:

isWrappedObjectMustBeIndirect in class PdfObjectWrapper<PdfDictionary>

Returns:

true if in the resultant document the object behind the wrapper must be indirect, otherwise false.