void Snp_FreeBitMap( struct BitMap *BitMap, ULONG Width, ULONG Height);
struct BitMap *Snp_AllocBitMap( ULONG SizeX, ULONG SizeY, ULONG Depth, ULONG Flags, struct BitMap *FriendBitMap);

UBYTE RGB4ToRR( ULONG RGB4);
UBYTE RGB4ToGG( ULONG RGB4);
UBYTE RGB4ToBB( ULONG RGB4);

UBYTE RGB32ToRGB8( ULONG RGB32);
ULONG RGB8ToRGB32( UBYTE RGB8);