DCTFilter (Apache FOP Core 2.11 API)
Date: 2025-04-24

org.apache.fop.pdf

## Class DCTFilter

- java.lang.Object
- - org.apache.fop.pdf.PDFFilter
  - - org.apache.fop.pdf.NullFilter
    - - org.apache.fop.pdf.DCTFilter

-     public class DCTFilter
      extends NullFilter

  DCT Filter class. Right now it is just used as a dummy filter flag so we can write JPG images to the PDF. The encode method just returns the data passed to it. In the future an actual JPEG compression should be added to the encode method so other images can be compressed.

  This work was authored by Eric Dalquist.

- - ### Constructor Summary

    Constructors
    Constructor and Description
    `DCTFilter()`

  - ### Method Summary

    All Methods Instance Methods Concrete Methods
    Modifier and Type | Method and Description
    --- | ---
    `PDFObject` | `getDecodeParms()` Get the decode params for this filter.
    `String` | `getName()` Get filter name.

    - ### Methods inherited from class org.apache.fop.pdf.NullFilter

      `applyFilter`

    - ### Methods inherited from class org.apache.fop.pdf.PDFFilter

      `isApplied, isASCIIFilter, setApplied`

    - ### Methods inherited from class java.lang.Object

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

- - ### Constructor Detail

    - #### DCTFilter

          public DCTFilter()

  - ### Method Detail

    - #### getName

          public String getName()

      Get filter name.
      Overrides:
        `getName` in class `NullFilter`
      Returns:
        the pdf name for the DCT filter

    - #### getDecodeParms

          public PDFObject getDecodeParms()

      Get the decode params for this filter.
      Overrides:
        `getDecodeParms` in class `NullFilter`
      Returns:
        the DCT filter has no decode params

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