@novnc/novnc
Version:
An HTML5 VNC client
195 lines (188 loc) • 7.84 kB
JavaScript
"use strict";
Object.defineProperty(exports, "__esModule", {
value: true
});
exports["default"] = void 0;
var Log = _interopRequireWildcard(require("../util/logging.js"));
function _getRequireWildcardCache(e) { if ("function" != typeof WeakMap) return null; var r = new WeakMap(), t = new WeakMap(); return (_getRequireWildcardCache = function _getRequireWildcardCache(e) { return e ? t : r; })(e); }
function _interopRequireWildcard(e, r) { if (!r && e && e.__esModule) return e; if (null === e || "object" != _typeof(e) && "function" != typeof e) return { "default": e }; var t = _getRequireWildcardCache(r); if (t && t.has(e)) return t.get(e); var n = { __proto__: null }, a = Object.defineProperty && Object.getOwnPropertyDescriptor; for (var u in e) if ("default" !== u && {}.hasOwnProperty.call(e, u)) { var i = a ? Object.getOwnPropertyDescriptor(e, u) : null; i && (i.get || i.set) ? Object.defineProperty(n, u, i) : n[u] = e[u]; } return n["default"] = e, t && t.set(e, n), n; }
function _typeof(o) { "@babel/helpers - typeof"; return _typeof = "function" == typeof Symbol && "symbol" == typeof Symbol.iterator ? function (o) { return typeof o; } : function (o) { return o && "function" == typeof Symbol && o.constructor === Symbol && o !== Symbol.prototype ? "symbol" : typeof o; }, _typeof(o); }
function _classCallCheck(a, n) { if (!(a instanceof n)) throw new TypeError("Cannot call a class as a function"); }
function _defineProperties(e, r) { for (var t = 0; t < r.length; t++) { var o = r[t]; o.enumerable = o.enumerable || !1, o.configurable = !0, "value" in o && (o.writable = !0), Object.defineProperty(e, _toPropertyKey(o.key), o); } }
function _createClass(e, r, t) { return r && _defineProperties(e.prototype, r), t && _defineProperties(e, t), Object.defineProperty(e, "prototype", { writable: !1 }), e; }
function _toPropertyKey(t) { var i = _toPrimitive(t, "string"); return "symbol" == _typeof(i) ? i : i + ""; }
function _toPrimitive(t, r) { if ("object" != _typeof(t) || !t) return t; var e = t[Symbol.toPrimitive]; if (void 0 !== e) { var i = e.call(t, r || "default"); if ("object" != _typeof(i)) return i; throw new TypeError("@@toPrimitive must return a primitive value."); } return ("string" === r ? String : Number)(t); } /*
* 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 HextileDecoder = exports["default"] = /*#__PURE__*/function () {
function HextileDecoder() {
_classCallCheck(this, HextileDecoder);
this._tiles = 0;
this._lastsubencoding = 0;
this._tileBuffer = new Uint8Array(16 * 16 * 4);
}
return _createClass(HextileDecoder, [{
key: "decodeRect",
value: function decodeRect(x, y, width, height, sock, display, depth) {
if (this._tiles === 0) {
this._tilesX = Math.ceil(width / 16);
this._tilesY = Math.ceil(height / 16);
this._totalTiles = this._tilesX * this._tilesY;
this._tiles = this._totalTiles;
}
while (this._tiles > 0) {
var bytes = 1;
if (sock.rQwait("HEXTILE", bytes)) {
return false;
}
var subencoding = sock.rQpeek8();
if (subencoding > 30) {
// Raw
throw new Error("Illegal hextile subencoding (subencoding: " + subencoding + ")");
}
var currTile = this._totalTiles - this._tiles;
var tileX = currTile % this._tilesX;
var tileY = Math.floor(currTile / this._tilesX);
var tx = x + tileX * 16;
var ty = y + tileY * 16;
var tw = Math.min(16, x + width - tx);
var th = Math.min(16, y + height - ty);
// Figure out how much we are expecting
if (subencoding & 0x01) {
// Raw
bytes += tw * th * 4;
} else {
if (subencoding & 0x02) {
// Background
bytes += 4;
}
if (subencoding & 0x04) {
// Foreground
bytes += 4;
}
if (subencoding & 0x08) {
// AnySubrects
bytes++; // Since we aren't shifting it off
if (sock.rQwait("HEXTILE", bytes)) {
return false;
}
var subrects = sock.rQpeekBytes(bytes).at(-1);
if (subencoding & 0x10) {
// SubrectsColoured
bytes += subrects * (4 + 2);
} else {
bytes += subrects * 2;
}
}
}
if (sock.rQwait("HEXTILE", bytes)) {
return false;
}
// We know the encoding and have a whole tile
sock.rQshift8();
if (subencoding === 0) {
if (this._lastsubencoding & 0x01) {
// Weird: ignore blanks are RAW
Log.Debug(" Ignoring blank after RAW");
} else {
display.fillRect(tx, ty, tw, th, this._background);
}
} else if (subencoding & 0x01) {
// Raw
var pixels = tw * th;
var data = sock.rQshiftBytes(pixels * 4, false);
// Max sure the image is fully opaque
for (var i = 0; i < pixels; i++) {
data[i * 4 + 3] = 255;
}
display.blitImage(tx, ty, tw, th, data, 0);
} else {
if (subencoding & 0x02) {
// Background
this._background = new Uint8Array(sock.rQshiftBytes(4));
}
if (subencoding & 0x04) {
// Foreground
this._foreground = new Uint8Array(sock.rQshiftBytes(4));
}
this._startTile(tx, ty, tw, th, this._background);
if (subencoding & 0x08) {
// AnySubrects
var _subrects = sock.rQshift8();
for (var s = 0; s < _subrects; s++) {
var color = void 0;
if (subencoding & 0x10) {
// SubrectsColoured
color = sock.rQshiftBytes(4);
} else {
color = this._foreground;
}
var xy = sock.rQshift8();
var sx = xy >> 4;
var sy = xy & 0x0f;
var wh = sock.rQshift8();
var sw = (wh >> 4) + 1;
var sh = (wh & 0x0f) + 1;
this._subTile(sx, sy, sw, sh, color);
}
}
this._finishTile(display);
}
this._lastsubencoding = subencoding;
this._tiles--;
}
return true;
}
// start updating a tile
}, {
key: "_startTile",
value: function _startTile(x, y, width, height, color) {
this._tileX = x;
this._tileY = y;
this._tileW = width;
this._tileH = height;
var red = color[0];
var green = color[1];
var blue = color[2];
var data = this._tileBuffer;
for (var i = 0; i < width * height * 4; i += 4) {
data[i] = red;
data[i + 1] = green;
data[i + 2] = blue;
data[i + 3] = 255;
}
}
// update sub-rectangle of the current tile
}, {
key: "_subTile",
value: function _subTile(x, y, w, h, color) {
var red = color[0];
var green = color[1];
var blue = color[2];
var xend = x + w;
var yend = y + h;
var data = this._tileBuffer;
var width = this._tileW;
for (var j = y; j < yend; j++) {
for (var i = x; i < xend; i++) {
var p = (i + j * width) * 4;
data[p] = red;
data[p + 1] = green;
data[p + 2] = blue;
data[p + 3] = 255;
}
}
}
// draw the current tile to the screen
}, {
key: "_finishTile",
value: function _finishTile(display) {
display.blitImage(this._tileX, this._tileY, this._tileW, this._tileH, this._tileBuffer, 0);
}
}]);
}();