rgbpack.h

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#ifndef _RGBPACK_H
#define _RGBPACK_H
 
#define RED_MASK         0x000000FF
#define GRN_MASK         0x0000FF00
#define BLU_MASK         0x00FF0000
 
#define INT_TO_RED(i, r) (r = (i & RED_MASK))
#define INT_TO_GRN(i, g) (g = (i & GRN_MASK) >> 8)
#define INT_TO_BLU(i, b) (b = (i & BLU_MASK) >> 16)
 
#define RGB_TO_INT(r, g, b, i)                              \
    (i = (((r) & RED_MASK) + ((int)((g) << 8) & GRN_MASK) + \
          ((int)((b) << 16) & BLU_MASK)))
 
#define CONST_COLS 45
#define COLUMNS    9
 
#endif /* _RGBPACK_H */