Class FunctionType3

java.lang.Object
com.sun.pdfview.function.PDFFunction
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
 invalid input: '<'invalid input: '<' /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
 invalid input: '<'invalid input: '<' /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
 invalid input: '<'invalid input: '<' /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
 invalid input: '<'invalid input: '<' /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 Details

    • samples

      private int[][] samples
      the actual samples, converted to integers. The first index is input values (from 0 to size[m - 1] * size[m - 2] * ... * size[0]), and the second is the output dimension within the sample (from 0 to n)

  • Constructor Details

    • FunctionType3

      protected FunctionType3()
      Creates a new instance of FunctionType3

  • Method Details

    • parse

      protected void parse(PDFObject obj) throws 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 invalid input: '<'bDomain and the Bounds array to the domain of the corresponding function.

      • Specified by:
      parse in class PDFFunction
      Throws:
      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
      inputOffset - the offset into the inputs array to read from
      outputs - an array of size n which will be filled with the output values, or null to return a new array
      outputOffset - the offset into the output array to write to