Package org.jivesoftware.smackx.jingleold.mediaimpl.sshare.api

Interface Quantizer

  • All Known Implementing Classes:
    OctTreeQuantizer
    public interface Quantizer
    The interface for an image quantizer. The addColor method is called (repeatedly if necessary) with all the image pixels. A color table can then be returned by calling the buildColorTable method.

    • Method Summary

      All Methods Instance Methods Abstract Methods 
      Modifier and Type Method Description
      void addPixels​(int[] pixels, int offset, int count)
      Add pixels to the quantizer.
      int[] buildColorTable()
      Build a color table from the added pixels.
      int getIndexForColor​(int rgb)
      Using the previously-built color table, return the index into that table for a pixel.
      void setup​(int numColors)
      Initialize the quantizer.

    • Method Detail

      • setup

        void setup​(int numColors)
        Initialize the quantizer. This should be called before adding any pixels.
        Parameters:
        numColors - the number of colors we're quantizing to.

      • addPixels

        void addPixels​(int[] pixels,
               int offset,
               int count)
        Add pixels to the quantizer.
        Parameters:
        pixels - the array of ARGB pixels
        offset - the offset into the array
        count - the count of pixels

      • buildColorTable

        int[] buildColorTable()
        Build a color table from the added pixels.
        Returns:
        an array of ARGB pixels representing a color table

      • getIndexForColor

        int getIndexForColor​(int rgb)
        Using the previously-built color table, return the index into that table for a pixel. This is guaranteed to return a valid index - returning the index of a color closer to that requested if necessary.
        Parameters:
        rgb - the pixel to find
        Returns:
        the pixel's index in the color table