Color channel ID

Macros
#define	GX_ALPHA0   2
#define	GX_ALPHA1   3
#define	GX_ALPHA_BUMP   7
#define	GX_ALPHA_BUMPN   8
#define	GX_COLOR0   0
#define	GX_COLOR0A0   4
#define	GX_COLOR1   1
#define	GX_COLOR1A1   5
#define	GX_COLORNULL   0xff
#define	GX_COLORZERO   6

Detailed Description