ucgui里面有没有实现前景色和背景色互反的函数呀

/*

      *********************************

      *                               *

      * Text and drawing mode defines *

      *                               *

      *********************************



These defines come in two flavors: the long version (.._DRAWMODE_..)

and the short ones (.._DM_..). They are identical, feel free to use

which ever one you like best.



*/

#define LCD_DRAWMODE_NORMAL (0)

#define LCD_DRAWMODE_XOR    (1<<0)

#define LCD_DRAWMODE_TRANS  (1<<1)

#define LCD_DRAWMODE_REV    (1<<2)



#define GUI_DRAWMODE_NORMAL  LCD_DRAWMODE_NORMAL

#define GUI_DRAWMODE_XOR     LCD_DRAWMODE_XOR

#define GUI_DRAWMODE_TRANS   LCD_DRAWMODE_TRANS

#define GUI_DRAWMODE_REV     LCD_DRAWMODE_REV

#define GUI_DM_NORMAL        LCD_DRAWMODE_NORMAL

#define GUI_DM_XOR           LCD_DRAWMODE_XOR

#define GUI_DM_TRANS         LCD_DRAWMODE_TRANS

#define GUI_DM_REV           LCD_DRAWMODE_REV



#define GUI_TEXTMODE_NORMAL  LCD_DRAWMODE_NORMAL

#define GUI_TEXTMODE_XOR     LCD_DRAWMODE_XOR

#define GUI_TEXTMODE_TRANS   LCD_DRAWMODE_TRANS

#define GUI_TEXTMODE_REV     LCD_DRAWMODE_REV

#define GUI_TM_NORMAL        LCD_DRAWMODE_NORMAL

#define GUI_TM_XOR           LCD_DRAWMODE_XOR

#define GUI_TM_TRANS         LCD_DRAWMODE_TRANS

#define GUI_TM_REV           LCD_DRAWMODE_REV



/* Text alignment flags, horizontal */

#define GUI_TA_HORIZONTAL  (3<<0)

#define GUI_TA_LEFT        (0<<0)

#define GUI_TA_RIGHT             (1<<0)

#define GUI_TA_CENTER             (2<<0)

#define GUI_TA_HCENTER           GUI_TA_CENTER  /* easier to remember :-)  */



/* Text alignment flags, vertical */

#define GUI_TA_VERTICAL   (3<<2)

#define GUI_TA_TOP              (0<<2)

#define GUI_TA_BOTTOM            (1<<2)

#define GUI_TA_BASELINE   (2<<2)

#define GUI_TA_VCENTER    (3<<2)