Class GifEncoder

java.lang.Object
javajs.img.ImageEncoder
javajs.img.GifEncoder
All Implemented Interfaces:
GenericImageEncoder
public class GifEncoder extends ImageEncoder
GifEncoder extensively adapted for Jmol by Bob Hanson Color quantization roughly follows the GIMP method "dither Floyd-Steinberg (normal)" but with some twists. (For example, we exclude the background color.) Note that although GIMP code annotation refers to "median-cut", it is really using MEAN-cut. That is what I use here as well. -- commented code allows visualization of the color space using Jmol. Very enlightening! -- much simplified interface with ImageEncoder -- uses simple Hashtable with Integer() to catalog colors -- allows progressive production of animated GIF via Jmol CAPTURE command -- uses general purpose javajs.util.OutputChannel for byte-handling options such as posting to a server, writing to disk, and retrieving bytes. -- allows JavaScript port -- Bob Hanson, first try: 24 Sep 2013; final coding: 9 Nov 2014
Author:
Bob Hanson hansonr@stolaf.edu

  • Constructor Details

    • GifEncoder

      public GifEncoder()

  • Method Details

    • setParams

      protected void setParams(Map<String,Object> params)
      we allow for animated GIF by being able to re-enter the code with different parameters held in params
      Specified by:
      setParams in class ImageEncoder

    • generate

      protected void generate() throws IOException
      Specified by:
      generate in class ImageEncoder
      Throws:
      IOException

    • close

      protected void close()
      Overrides:
      close in class ImageEncoder

    • toLABnorm

      protected P3 toLABnorm(int rgb)
      ////////////////////// CIE Lab / XYZ / sRGB conversion methods /////////

    • toRGB

      protected P3 toRGB(P3 lab)

    • rgbToXyz

      public P3 rgbToXyz(P3 rgb, P3 xyz)

    • xyzToRgb

      public P3 xyzToRgb(P3 xyz, P3 rgb)

    • xyzToLab

      public P3 xyzToLab(P3 xyz, P3 lab)

    • labToXyz

      public P3 labToXyz(P3 lab, P3 xyz)

    • flushBytes

      protected void flushBytes()