RGB颜色转换算法C语言实现

typedef unsigned short     TUINT16;

#define RGB565(R, G, B) \
    (((TUINT16) ((R) >> 3)) << 11) + (((TUINT16) ((G) >> 2)) << 5) + ((TUINT16) ((B) >> 3))
 
#define RGB555_TO_RGB565(X) \
    ((((X)&0x7FE0) << 1)|((X)&0x003F))
 
#define	COLOR_BLACK		RGB565(0, 0, 0)
 
#define	COLOR_DRED		RGB565(64, 0, 0)
#define	COLOR_DGREEN	RGB565(0, 64, 0)
#define	COLOR_DBLUE		RGB565(0, 0, 64)
 
#define	COLOR_DYELLOW	RGB565(64, 64, 0)
#define	COLOR_DPURPLE	RGB565(64, 0, 64)
#define	COLOR_DDIAN		RGB565(0, 64, 64)
 
#define	COLOR_GRAY		RGB565(64, 64, 64)
 
#define	COLOR_RED		RGB565(255, 0, 0)
#define	COLOR_GREEN		RGB565(0, 255, 0)
#define	COLOR_BLUE		RGB565(0, 0, 255)
 
#define	COLOR_YELLOW	RGB565(255, 255, 0)
#define	COLOR_PURPLE	RGB565(255, 0, 255)
#define	COLOR_DIAN		RGB565(0, 255, 255)
 
#define	COLOR_WHITE		RGB565(255, 255, 255)