Package com.jackmeng.stl

Class stl_BlurHash

java.lang.Object
com.jackmeng.stl.stl_BlurHash
public final class stl_BlurHash
extends java.lang.Object
A blurring to hash implementation in Java
Author:
Jack Meng

  • Nested Class Summary

    Nested Classes
    Modifier and Type Class Description
    static class  stl_BlurHash.blurhash_base83  

  • Field Summary

    Fields
    Modifier and Type Field Description
    (package private) static double[] __ll
    Represents the colors;

  • Constructor Summary

    Constructors
    Modifier Constructor Description
    private stl_BlurHash()  

  • Method Summary

    Modifier and Type Method Description
    static int _as_linear​(double val)
    Converts the given number to be within the sRGB range
    static int[] dec​(java.lang.String blurHash, int width, int height, double punch)
    Decodes the given BlurHash into an array of pixels
    static java.lang.String enc​(int[] pixels, int width, int height, int componentX, int componentY)
    Encodes the given values into a BlurHash
    static double max​(double[][] val)
    Finds a max value in an array (2D)
    static double to_linear​(int val)
    Converts the given number to be within the linear range

    Methods inherited from class java.lang.Object

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

  • Field Details

    • __ll

      static final double[] __ll
      Represents the colors;

  • Constructor Details

    • stl_BlurHash

      private stl_BlurHash()

  • Method Details

    • max

      public static double max​(double[][] val)
      Finds a max value in an array (2D)
      Parameters:
      val - The array
      Returns:
      A max value

    • to_linear

      public static double to_linear​(int val)
      Converts the given number to be within the linear range
      Parameters:
      val - The number to convert
      Returns:
      The converted number

    • _as_linear

      public static int _as_linear​(double val)
      Converts the given number to be within the sRGB range
      Parameters:
      val - The number to convert
      Returns:
      The converted number

    • enc

      public static java.lang.String enc​(int[] pixels, int width, int height, int componentX, int componentY)
      Encodes the given values into a BlurHash
      Parameters:
      pixels - The pixels to encode
      width - The width of the image
      height - The height of the image
      componentX - The x-component of the center of the image
      componentY - The y-component of the center of the image
      Returns:
      The encoded BlurHash as a String

    • dec

      public static int[] dec​(java.lang.String blurHash, int width, int height, double punch)
      Decodes the given BlurHash into an array of pixels
      Parameters:
      blurHash - The BlurHash to decode (String)
      width - The width of the image
      height - The height of the image
      punch - The punch value of the image; often regarded as the "sharpness" of the image
      Returns:
      The decoded pixels