org.icepdf.core.pobjects.functions
Class Function_4

java.lang.Object
  org.icepdf.core.pobjects.functions.Function
      org.icepdf.core.pobjects.functions.Function_4

public class Function_4
extends Function

Type 4 Function (PDF 1.3), also called a PostScript calculator function, shall be represented as a stream containing code written n a small subset of the PostScript language.

Type 4 functions offer greater flexibility and potentially greater accuracy then exponential functions (type 2 functions). Type 4 functions also make it possible to include a wide variety of halftone spots functions without the loss of accuracy that comes from sampling, and without adding to the list a predefined spot function (10.5.3 spot functions). All of the predefined spot functions can be written as type 4 functions.

Since:

4.2

Author:

ICEsoft Technologies Inc.

Field Summary

Fields inherited from class org.icepdf.core.pobjects.functions.Function

domain, functionType, range

Constructor Summary

Function_4(Dictionary d)

Method Summary

float[]

calculate(float[] x) Puts the value x thought the function type 4 algorithm.

Methods inherited from class org.icepdf.core.pobjects.functions.Function

getDomain, getFunction, getFunctionType, getRange, interpolate

Methods inherited from class java.lang.Object

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

Constructor Detail

Function_4

public Function_4(Dictionary d)

Method Detail

calculate

public float[] calculate(float[] x)

Puts the value x thought the function type 4 algorithm.

Specified by:

calculate in class Function

Parameters:

x - input values m

Returns:

output values n