struct colorsum {
	unsigned long r, g, b;
};

typedef struct node * OCTREE;
struct node {
	unsigned char leaf;
	unsigned char level;
	unsigned char colorindex;
	unsigned char children;
	unsigned long colorcount;
	struct colorsum rgbsum;
	OCTREE nextreduceable;
	OCTREE next[8];
};

extern OCTREE	tree;

UINT calc_palette(UINT i, double Cfactor);