/*
 * quantize.h -- image quantizer header file
 * (C)Copyright 1998 by Hiroshi Takekawa
 * Last Modified: Fri Apr  9 06:53:04 1999.
 */

typedef struct _box {
  /* box coordinate */
  int rmin, rmax;
  int gmin, gmax;
  int bmin, bmax;
  /* avarage values */
  int r, g, b;
  /* the volume of the box */
  int volume;
  /* how many pixels in the box */
  int population;
  /* which egde to be splitted */
  int longest;
} box;

/* color precision 0に近い値ほど良い、その分メモリをくう */
#define PRECISION_R 2
#define PRECISION_G 1
#define PRECISION_B 2

unsigned char *quantize(unsigned char *, unsigned char *, int, int, int);

/* defineから自動的に定義される定数 */
#define R_INDEX (256 >> PRECISION_R)
#define G_INDEX (256 >> PRECISION_G)
#define B_INDEX (256 >> PRECISION_B)