Method _basicRect

systemvm/agent/noVNC/core/decoders/tight.js:100–141

(ctl, x, y, width, height, sock, display, depth)

    }

    _basicRect(ctl, x, y, width, height, sock, display, depth) {
        if (this._filter === null) {
            if (ctl & 0x4) {
                if (sock.rQwait("TIGHT", 1)) {
                    return false;
                }

                this._filter = sock.rQshift8();
            } else {
                // Implicit CopyFilter
                this._filter = 0;
            }
        }

        let streamId = ctl & 0x3;

        let ret;

        switch (this._filter) {
            case 0: // CopyFilter
                ret = this._copyFilter(streamId, x, y, width, height,
                                       sock, display, depth);
                break;
            case 1: // PaletteFilter
                ret = this._paletteFilter(streamId, x, y, width, height,
                                          sock, display, depth);
                break;
            case 2: // GradientFilter
                ret = this._gradientFilter(streamId, x, y, width, height,
                                           sock, display, depth);
                break;
            default:
                throw new Error("Illegal tight filter received (ctl: " +
                                       this._filter + ")");
        }

        if (ret) {
            this._filter = null;
        }

        return ret;
    }

    _copyFilter(streamId, x, y, width, height, sock, display, depth) {
        const uncompressedSize = width * height * 3;