/* Fill empty pixel lines */
    if (GUI_Context.pAFont->YDist > GUI_Context.pAFont->YSize) {
      int YMag = GUI_Context.pAFont->YMag;
      int YDist = GUI_Context.pAFont->YDist * YMag;
      int YSize = GUI_Context.pAFont->YSize * YMag;
      if (DrawMode != LCD_DRAWMODE_TRANS) {
        LCD_COLOR OldColor = GUI_GetColor();
        GUI_SetColor(GUI_GetBkColor());
        LCD_FillRect(GUI_Context.DispPosX,
                     GUI_Context.DispPosY + YSize,
                     GUI_Context.DispPosX + pCharInfo->XSize,
                     GUI_Context.DispPosY + YDist);
        GUI_SetColor(OldColor);
      }
    }
    LCD_SetDrawMode(OldDrawMode); /* Restore draw mode */
    GUI_Context.DispPosX += pCharInfo->XDist * GUI_Context.pAFont->XMag;
  }
}

void GUIPROP_DispChar(U16P c)函数只是用来显示数据的，为了让数据显示在控件中间，还要修改int GUIPROP_GetCharDistX(U16P c)为：

int GUIPROP_GetCharDistX(U16P c) {
 if(c<0x80)//是英文
 {
    const GUI_FONT_PROP GUI_UNI_PTR * pProp;
    if(GUI_Context.pAFont == &GUI_FontHZ16)//在GUI_FontHZ16中找到字符间距，用于控件字符水平对齐，防止英文字符宽度被认为跟汉字一样
    {
        pProp = GUIPROP_FindChar(GUI_Font16_ASCII.p.pProp, c);//在GUI_Font16_ASCII字库里面找字符c
        return (pProp) ? (pProp->paCharInfo+(c-pProp->First))->XSize * GUI_Font16_ASCII.XMag : 0;//返回字符c的横坐标大小
    }
    else
    {
        pProp = GUIPROP_FindChar(GUI_Font24_ASCII.p.pProp, c);
        return (pProp) ? (pProp->paCharInfo+(c-pProp->First))->XSize * GUI_Font24_ASCII.XMag : 0;
    }
   
  }
  else
  {
    const GUI_FONT_PROP GUI_UNI_PTR * pProp = GUIPROP_FindChar(GUI_Context.pAFont->p.pProp, c);
    return (pProp) ? (pProp->paCharInfo+(c-pProp->First))->XSize * GUI_Context.pAFont->XMag : 0;
  }
 
}

当这两个函数修改完毕，并且做好上面大牛的链接内容后，字体数据就放在外部flash中，显示器可以在控件上同时显示汉字和英文了。