Package com.ribs.pdf

Class PDFFunction

java.lang.Object

com.ribs.pdf.PDFFunction

Direct Known Subclasses:

ArrayFunction, PDFInterpolationFunction, PDFSampledFunction, PDFStitchingFunction

public abstract class PDFFunction
extends Object

Field Summary

Fields

Modifier and Type	Field	Description
static final int	ExponentialInterpolation
int	functionType
float[]	inputDomain
float[]	inputValues
float[]	outputRange
static final int	PostScriptCalculator
float[]	returnValues
static final int	Sampled
static final int	Stitching

Constructor Summary

Constructors

Constructor	Description
PDFFunction()
PDFFunction(PDFStream functionStream, PDFFile srcFile)	Constructor for functions which take a stream
PDFFunction(Map functionDict, PDFFile srcFile)	Constructor - takes the pdf function dictionary and the file it came from.

Method Summary

Modifier and Type	Method	Description
void	clipToRange(float[] vals, float[] range, float[] clipped)	Used internally by all function types to clip both the input and the output values to the Range and Domain values.
float[]	evaluate(float[] inputs)	Evaluate the function.
abstract void	function_implementation(float[] in, float[] out)
static PDFFunction	getInstance(Object function, PDFFile srcFile)	Reads the function dictionary and creates an instance of the appropriate PDFFunction subclass
void	initializeParameters(Map functionDict, PDFFile srcFile)	Read the function parameters
int	numInputValues()	Returns the number of parameters this function takes as input
int	numOutputValues()	Returns the number of values this function returns.

Methods inherited from class java.lang.Object

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

Field Details

Sampled

public static final int Sampled

See Also:

• Constant Field Values

ExponentialInterpolation

public static final int ExponentialInterpolation

See Also:

• Constant Field Values

Stitching

public static final int Stitching

See Also:

• Constant Field Values

PostScriptCalculator

public static final int PostScriptCalculator

See Also:

• Constant Field Values

functionType

public int functionType

inputDomain

public float[] inputDomain

outputRange

public float[] outputRange

returnValues

public float[] returnValues

inputValues

public float[] inputValues

Constructor Details

PDFFunction

public PDFFunction()

PDFFunction

public PDFFunction(Map functionDict,
 PDFFile srcFile)

Constructor - takes the pdf function dictionary and the file it came from.

PDFFunction

public PDFFunction(PDFStream functionStream,
 PDFFile srcFile)

Constructor for functions which take a stream

Method Details

getInstance

public static PDFFunction getInstance(Object function,
 PDFFile srcFile)

Reads the function dictionary and creates an instance of the appropriate PDFFunction subclass

initializeParameters

public void initializeParameters(Map functionDict,
 PDFFile srcFile)

Read the function parameters

numInputValues

public int numInputValues()

Returns the number of parameters this function takes as input

numOutputValues

public int numOutputValues()

Returns the number of values this function returns. Should be overridden by subclasses that don't require outputRange.

evaluate

public float[] evaluate(float[] inputs)

Evaluate the function. Note that the return value array is reused, so if you need to save the results around for any length of time, you should copy them out.

clipToRange

public void clipToRange(float[] vals,
 float[] range,
 float[] clipped)

Used internally by all function types to clip both the input and the output values to the Range and Domain values.

function_implementation

public abstract void function_implementation(float[] in,
 float[] out)