H265编码流媒体播放器EasyPlayer-RTMP自定义OSD字体颜色如何修改？

/// <summary>
        /// 附加信息
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void AddScreenFontTSMenuItem_Click(object sender, EventArgs e)
        {
            int ret = -1;
            var rect = new Rect { X = 10, Y = 10, Width = panel1.Width, Height = panel1.Height };
            var panelSize = this.panel1.ClientSize;
 
            PlayerSdk.EASY_PALYER_OSD fontInfo = new PlayerSdk.EASY_PALYER_OSD
            {
                alpha = 255,
                size = 35,
                color = (uint)ToArgb(Color.Red),
                shadowcolor = (uint)ToArgb(Color.Black),
                stOSD = XMLOperate.BYCSB,
                rect = new PlayerSdk.tagRECT { left = (int)rect.X, top = (int)rect.Y, right = (int)rect.Width, bottom = (int)rect.Height }
            };
 
            var checkState = (sender as ToolStripMenuItem).CheckState;
 
            if (checkState == CheckState.Unchecked)
            {
                ret = PlayerSdk.EasyPlayer_ShowOSD(channelID, fontInfo);
                (sender as ToolStripMenuItem).CheckState = CheckState.Checked;
            }
            if (checkState == CheckState.Checked)
            {
                ret = PlayerSdk.EasyPlayer_ShowOSD(channelID, fontInfo, false);
                (sender as ToolStripMenuItem).CheckState = CheckState.Unchecked;
            }
        }
 
OSD有定义一个结构体如下：color可以修改颜色，stOSD传参是需要显示的内容，tagRECT也是一个结构体，可以自己定义显示位置。
/// <summary>
        /// OSD 信息集合
        /// </summary>
        [StructLayoutAttribute(LayoutKind.Sequential, CharSet = CharSet.Ansi)]
        public struct EASY_PALYER_OSD
        {
            [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 1024)]
            public string stOSD;
            public uint alpha;        //0-255
            public uint color;        //RGB(0xf9,0xf9,0xf9)
            public uint shadowcolor;      //RGB(0x4d,0x4d,0x4d) 全为0背景透明
            public tagRECT rect;      //OSD基于图像右上角显示区域
            public int size;       //just D3D Support
        }
 
/// <summary>
        /// 像素信息
        /// </summary>
        [StructLayoutAttribute(LayoutKind.Sequential)]
        public struct tagRECT
        {
            public int left;
            public int top;
            public int right;
            public int bottom;
        }