Package org.apache.commons.imaging.formats.png

# Class PngConstants

java.lang.Object
org.apache.commons.imaging.formats.png.PngConstants

public final class PngConstants extends Object

- ## Field Summary

  Fields
  Modifier and Type
  Field
  Description
  `static final int`
  `COMPRESSION_DEFLATE_INFLATE`
  `static final byte`
  `COMPRESSION_TYPE_INFLATE_DEFLATE`
  `static final byte`
  `FILTER_METHOD_ADAPTIVE`
  `static final String`
  `PARAM_KEY_PNG_COMPRESSION_LEVEL`
  Parameter key.
  `static final BinaryConstant`
  `PNG_SIGNATURE`
  `static final String`
  `XMP_KEYWORD`

- ## Method Summary

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

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

- ## Field Details

  - ### COMPRESSION_DEFLATE_INFLATE

    public static final int COMPRESSION_DEFLATE_INFLATE
    See Also:
      - Constant Field Values

  - ### PNG_SIGNATURE

    public static final BinaryConstant PNG_SIGNATURE

  - ### COMPRESSION_TYPE_INFLATE_DEFLATE

    public static final byte COMPRESSION_TYPE_INFLATE_DEFLATE
    See Also:
      - Constant Field Values

  - ### FILTER_METHOD_ADAPTIVE

    public static final byte FILTER_METHOD_ADAPTIVE
    See Also:
      - Constant Field Values

  - ### XMP_KEYWORD

    public static final String XMP_KEYWORD
    See Also:
      - Constant Field Values

  - ### PARAM_KEY_PNG_COMPRESSION_LEVEL

    public static final String PARAM_KEY_PNG_COMPRESSION_LEVEL
    Parameter key. Used to indicate the PNG compression level to be used.

    For valid values, see `Deflater`. If no value is specified, it will use the default compression level.

    See Also:
      - `Deflater`
      - Constant Field Values