NScumm.Sword1.ControlButton.ControlButton C# (CSharp) Method

        public ControlButton(ushort x, ushort y, uint resId, ButtonIds id, byte flag, ResMan pResMan, byte[] screenBuf,
            ISystem system)
        {
            _x = x;
            _y = y;
            _id = id;
            _flag = flag;
            _resId = resId;
            _resMan = pResMan;
            _frameIdx = 0;
            _resMan.ResOpen(_resId);
            FrameHeader tmp = new FrameHeader(_resMan.FetchFrame(_resMan.FetchRes(_resId), 0));
            _width = _resMan.ReadUInt16(tmp.width);
            _width = (ushort)((_width > Screen.SCREEN_WIDTH) ? Screen.SCREEN_WIDTH : _width);
            _height = _resMan.ReadUInt16(tmp.height);
            if ((x == 0) && (y == 0))
            { // center the frame (used for panels);
                _x = (ushort)((((640 - _width) / 2) < 0) ? 0 : ((640 - _width) / 2));
                _y = (ushort)((((480 - _height) / 2) < 0) ? 0 : ((480 - _height) / 2));
            }
            _dstBuf = new ByteAccess(screenBuf, _y * Screen.SCREEN_WIDTH + _x);
            _system = system;
        }