com.sun.pdfview.function
Class FunctionType3

java.lang.Object
  extended by com.sun.pdfview.function.PDFFunction
      extended by com.sun.pdfview.function.FunctionType3

public class FunctionType3
extends PDFFunction

3.9.3 - A stitching function define a stitching of the subdomains of several 1-input functions to produce a single new 1-input function. Since the resulting stitching function is a 1-input function, the domain is given by a two-element array, [ Domain0 Domain1 ].

 Example 4.25
 5 0 obj                          % Shading dictionary
  << /ShadingType 3
      /ColorSpace /DeviceCMYK
      /Coords [ 0.0 0.0 0.096 0.0 0.0 1.0 00]% Concentric circles
      /Function 10 0 R
      /Extend [ true true ]
  >>
 endobj

 10 0 obj                         % Color function
  << /FunctionType 3
      /Domain [ 0.0 1.0 ]
      /Functions [ 11 0 R 12 0 R ]
      /Bounds [ 0.708 ]
      /Encode [ 1.0 0.0 0.0 1.0 ]
  >>
 endobj

 11 0 obj                         % First subfunction
  << /FunctionType 2
      /Domain [ 0.0 1.0 ]
      /C0 [ 0.929 0.357 1.000 0.298 ]
      /C1 [ 0.631 0.278 1.000 0.027 ]
      /N 1.048
  >>
 endobj

 12 0 obj                         % Second subfunction
  << /FunctionType 2
      /Domain [ 0.0 1.0 ]
      /C0 [ 0.929 0.357 1.000 0.298 ]
      /C1 [ 0.941 0.400 1.000 0.102 ]
      /N 1.374
  >>
 endobj
 


Field Summary
 
Fields inherited from class com.sun.pdfview.function.PDFFunction
TYPE_0, TYPE_2, TYPE_3, TYPE_4
 
Constructor Summary
protected FunctionType3()
          Creates a new instance of FunctionType3
 
Method Summary
protected  void doFunction(float[] inputs, int inputOffset, float[] outputs, int outputOffset)
          Map from m input values to n output values.
protected  void parse(PDFObject obj)
          Read the function information from a PDF Object.
 
Methods inherited from class com.sun.pdfview.function.PDFFunction
calculate, calculate, getDomain, getFunction, getNumInputs, getNumOutputs, getRange, getType, setDomain, setRange
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

FunctionType3

protected FunctionType3()
Creates a new instance of FunctionType3

Method Detail

parse

protected void parse(PDFObject obj)
              throws java.io.IOException

Read the function information from a PDF Object.

Required entries ( Table 3.38) (3200-1:2008:7.10.4, table: 41) are:

  • Functions array (Required) An array of k 1-input functions making up the stitching function. The output dimensionality of all functions must be the same, and compatible with the value of Range if Range is present.
  • Domainarray (Required) A 2 element array where Domain0 is less than Domain1. This is read by the PDFFunction superclass.
  • Bounds array (Required) An array of k-1 numbers that, in combination with Domain, define the intervals to which each function from the Functions array applies. Bounds elements must be in order of increasing value, and each value must be within the domain defined by >b>Domain.
  • Encode array (Required) An array of 2 * k numbers that, taken in pairs, map each subset of the domain defined by and the Bounds array to the domain of the corresponding function.
  • Specified by:
    parse in class PDFFunction
    Throws:
    java.io.IOException

    doFunction

    protected void doFunction(float[] inputs,
                              int inputOffset,
                              float[] outputs,
                              int outputOffset)
    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 m input values
    outputs - an array of size n which will be filled with the output values, or null to return a new array
    inputOffset - the offset into the inputs array to read from
    outputOffset - the offset into the output array to write to