Method _framebufferUpdate

core/rfb.js:2617–2664

()

    }

    _framebufferUpdate() {
        if (this._FBU.rects === 0) {
            if (this._sock.rQwait("FBU header", 3, 1)) { return false; }
            this._sock.rQskipBytes(1);  // Padding
            this._FBU.rects = this._sock.rQshift16();

            // Make sure the previous frame is fully rendered first
            // to avoid building up an excessive queue
            if (this._display.pending()) {
                this._flushing = true;
                this._display.flush()
                    .then(() => {
                        this._flushing = false;
                        // Resume processing
                        if (!this._sock.rQwait("message", 1)) {
                            this._handleMessage();
                        }
                    });
                return false;
            }
        }

        while (this._FBU.rects > 0) {
            if (this._FBU.encoding === null) {
                if (this._sock.rQwait("rect header", 12)) { return false; }
                /* New FramebufferUpdate */

                this._FBU.x = this._sock.rQshift16();
                this._FBU.y = this._sock.rQshift16();
                this._FBU.width = this._sock.rQshift16();
                this._FBU.height = this._sock.rQshift16();
                this._FBU.encoding = this._sock.rQshift32();
                /* Encodings are signed */
                this._FBU.encoding >>= 0;
            }

            if (!this._handleRect()) {
                return false;
            }

            this._FBU.rects--;
            this._FBU.encoding = null;
        }

        this._display.flip();

        return true;  // We finished this FBU
    }

    _handleRect() {
        switch (this._FBU.encoding) {