novnc/lib/decoders/raw.js

An HTML5 VNC client

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports["default"] = void 0;
function _typeof(obj) { "@babel/helpers - typeof"; return _typeof = "function" == typeof Symbol && "symbol" == typeof Symbol.iterator ? function (obj) { return typeof obj; } : function (obj) { return obj && "function" == typeof Symbol && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; }, _typeof(obj); }
function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }
function _defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, _toPropertyKey(descriptor.key), descriptor); } }
function _createClass(Constructor, protoProps, staticProps) { if (protoProps) _defineProperties(Constructor.prototype, protoProps); if (staticProps) _defineProperties(Constructor, staticProps); Object.defineProperty(Constructor, "prototype", { writable: false }); return Constructor; }
function _toPropertyKey(arg) { var key = _toPrimitive(arg, "string"); return _typeof(key) === "symbol" ? key : String(key); }
function _toPrimitive(input, hint) { if (_typeof(input) !== "object" || input === null) return input; var prim = input[Symbol.toPrimitive]; if (prim !== undefined) { var res = prim.call(input, hint || "default"); if (_typeof(res) !== "object") return res; throw new TypeError("@@toPrimitive must return a primitive value."); } return (hint === "string" ? String : Number)(input); }
/*
 * noVNC: HTML5 VNC client
 * Copyright (C) 2019 The noVNC Authors
 * Licensed under MPL 2.0 (see LICENSE.txt)
 *
 * See README.md for usage and integration instructions.
 *
 */
var RawDecoder = /*#__PURE__*/function () {
  function RawDecoder() {
    _classCallCheck(this, RawDecoder);
    this._lines = 0;
  }
  _createClass(RawDecoder, [{
    key: "decodeRect",
    value: function decodeRect(x, y, width, height, sock, display, depth, frame_id) {
      if (width === 0 || height === 0) {
        return true;
      }
      if (this._lines === 0) {
        this._lines = height;
      }
      var pixelSize = depth == 8 ? 1 : 4;
      var bytesPerLine = width * pixelSize;
      if (sock.rQwait("RAW", bytesPerLine)) {
        return false;
      }
      var curY = y + (height - this._lines);
      var currHeight = Math.min(this._lines, Math.floor(sock.rQlen / bytesPerLine));
      var pixels = width * currHeight;
      var data = sock.rQ;
      var index = sock.rQi;

      // Convert data if needed
      if (depth == 8) {
        var newdata = new Uint8Array(pixels * 4);
        for (var i = 0; i < pixels; i++) {
          newdata[i * 4 + 0] = (data[index + i] >> 0 & 0x3) * 255 / 3;
          newdata[i * 4 + 1] = (data[index + i] >> 2 & 0x3) * 255 / 3;
          newdata[i * 4 + 2] = (data[index + i] >> 4 & 0x3) * 255 / 3;
          newdata[i * 4 + 3] = 255;
        }
        data = newdata;
        index = 0;
      }

      // Max sure the image is fully opaque
      for (var _i = 0; _i < pixels; _i++) {
        data[_i * 4 + 3] = 255;
      }
      display.blitImage(x, curY, width, currHeight, data, index, frame_id);
      sock.rQskipBytes(currHeight * bytesPerLine);
      this._lines -= currHeight;
      if (this._lines > 0) {
        return false;
      }
      return true;
    }
  }]);
  return RawDecoder;
}();
exports["default"] = RawDecoder;