core/encodings.js

   1 /*
   2  * noVNC: HTML5 VNC client
   3  * Copyright (C) 2017 Pierre Ossman for Cendio AB
   4  * Licensed under MPL 2.0 (see LICENSE.txt)
   5  *
   6  * See README.md for usage and integration instructions.
   7  */
   8
   9 export var encodings = {
  10     encodingRaw: 0,
  11     encodingCopyRect: 1,
  12     encodingRRE: 2,
  13     encodingHextile: 5,
  14     encodingTight: 7,
  15     encodingTightPNG: -260,
  16
  17     pseudoEncodingQualityLevel9: -23,
  18     pseudoEncodingQualityLevel0: -32,
  19     pseudoEncodingDesktopSize: -223,
  20     pseudoEncodingLastRect: -224,
  21     pseudoEncodingCursor: -239,
  22     pseudoEncodingQEMUExtendedKeyEvent: -258,
  23     pseudoEncodingExtendedDesktopSize: -308,
  24     pseudoEncodingXvp: -309,
  25     pseudoEncodingFence: -312,
  26     pseudoEncodingContinuousUpdates: -313,
  27     pseudoEncodingCompressLevel9: -247,
  28     pseudoEncodingCompressLevel0: -256,
  29 };
  30
  31 export function encodingName(num) {
  32     switch (num) {
  33         case encodings.encodingRaw:      return "Raw";
  34         case encodings.encodingCopyRect: return "CopyRect";
  35         case encodings.encodingRRE:      return "RRE";
  36         case encodings.encodingHextile:  return "Hextile";
  37         case encodings.encodingTight:    return "Tight";
  38         case encodings.encodingTightPNG:    return "Tight";
  39         default:                         return "[unknown encoding " + num + "]";
  40     }
  41 }