VxWorks如何实现2D图形绘制

#include <ugl/uglWin.h>UGL_LOCAL UGL_STATUS cbDraw    (    WIN_ID   winId,      /* window ID */                                    WIN_MSG *pMsg,       /* message (always MSG_DRAW) */                                        void    *pData,      /* copy of data passed to winCreate() */                   void    *pParam      /* parameter passed to winCbAdd() */      )    {    /* 使用浅蓝色填充window */    uglBackgroundColorSet(pMsg->data.draw.gcId, WIN_LIGHTBLUE);    uglLineWidthSet(pMsg->data.draw.gcId, 0);    uglRectangle(pMsg->data.draw.gcId, pMsg->data.draw.rect.left,                  pMsg->data.draw.rect.top, pMsg->data.draw.rect.right,                  pMsg->data.draw.rect.bottom);    /* 在window内绘制白色文本 */    uglForegroundColorSet(pMsg->data.draw.gcId, WIN_WHITE);    uglFontSet(pMsg->data.draw.gcId, WIN_FONT_SMALL);    uglTextDrawW(pMsg->data.draw.gcId, 10, 10, -1, "春节快乐");    /* return UGL_STATUS_FINISHED because default handling not needed */    return UGL_STATUS_FINISHED;    }void testWin()    {    WIN_APP_ID appId;    WIN_ID     winId;    /* 创建一个application context */    appId = winAppCreate("New Year", 0, 0, 0, UGL_NULL);    /* 创建一个带边框的可见window */    winId = winCreate(appId, UGL_NULL_ID,                        WIN_ATTRIB_FRAMED | WIN_ATTRIB_VISIBLE,                        100, 100, 200, 150, UGL_NULL, 0, UGL_NULL);    /* 添加MSG_DRAW的回调，当window被绘制时调用 */    winCbAdd(winId, MSG_DRAW, 0, cbDraw, UGL_NULL);    /* 把window贴到屏幕上 */    winAttach(winId, UGL_NULL_ID, UGL_NULL_ID);    }