spb/admin-ka

1/*2 * noVNC: HTML5 VNC client3 * Copyright (C) 2024 The noVNC authors4 * Licensed under MPL 2.0 (see LICENSE.txt)5 *6 * See README.md for usage and integration instructions.7 *8 */910import Inflator from "../inflator.js";1112export default class ZlibDecoder {13    constructor() {14        this._zlib = new Inflator();15        this._length = 0;16    }1718    decodeRect(x, y, width, height, sock, display, depth) {19        if ((width === 0) || (height === 0)) {20            return true;21        }2223        if (this._length === 0) {24            if (sock.rQwait("ZLIB", 4)) {25                return false;26            }2728            this._length = sock.rQshift32();29        }3031        if (sock.rQwait("ZLIB", this._length)) {32            return false;33        }3435        let data = new Uint8Array(sock.rQshiftBytes(this._length, false));36        this._length = 0;3738        this._zlib.setInput(data);39        data = this._zlib.inflate(width * height * 4);40        this._zlib.setInput(null);4142        // Max sure the image is fully opaque43        for (let i = 0; i < width * height; i++) {44            data[i * 4 + 3] = 255;45        }4647        display.blitImage(x, y, width, height, data, 0);4849        return true;50    }51}52