Method _handleCursor

systemvm/agent/noVNC/core/rfb.js:2979–3014

()

    }

    _handleCursor() {
        const hotx = this._FBU.x;  // hotspot-x
        const hoty = this._FBU.y;  // hotspot-y
        const w = this._FBU.width;
        const h = this._FBU.height;

        const pixelslength = w * h * 4;
        const masklength = Math.ceil(w / 8) * h;

        let bytes = pixelslength + masklength;
        if (this._sock.rQwait("cursor encoding", bytes)) {
            return false;
        }

        // Decode from BGRX pixels + bit mask to RGBA
        const pixels = this._sock.rQshiftBytes(pixelslength);
        const mask = this._sock.rQshiftBytes(masklength);
        let rgba = new Uint8Array(w * h * 4);

        let pixIdx = 0;
        for (let y = 0; y < h; y++) {
            for (let x = 0; x < w; x++) {
                let maskIdx = y * Math.ceil(w / 8) + Math.floor(x / 8);
                let alpha = (mask[maskIdx] << (x % 8)) & 0x80 ? 255 : 0;
                rgba[pixIdx    ] = pixels[pixIdx + 2];
                rgba[pixIdx + 1] = pixels[pixIdx + 1];
                rgba[pixIdx + 2] = pixels[pixIdx];
                rgba[pixIdx + 3] = alpha;
                pixIdx += 4;
            }
        }

        this._updateCursor(rgba, hotx, hoty, w, h);

        return true;
    }

    _handleDesktopName() {
        if (this._sock.rQwait("DesktopName", 4)) {