www.pudn.com > jpeglib.rar > Dl1quant.h

// 
//	This has been modified from Dennis Lee's original version 
//	 
 
/* 
 * File: dl1quant.h 
 * 
 * Header file for dl1quant.c (DL1 Quantization) 
 * 
 * Copyright (C) 1993-1997 Dennis Lee 
 */ 
 
#ifndef DL1QUANT_H 
#define DL1QUANT_H 
 
#include "basic.h" 
 
#ifdef __cplusplus 
extern "C" { 
#endif 
 
 
typedef struct { 
    ulong r, g, b; 
    ulong pixel_count; 
    ulong pixels_in_cube; 
    uchar children; 
    uchar palette_index; 
    } CUBE; 
 
typedef struct { 
    uchar  level; 
    ushort index; 
    } FCUBE; 
 
typedef struct { 
    uchar palette_index, 
	  red, green, blue; 
    ulong distance; 
    ulong squares[255+255+1]; 
    } CLOSEST_INFO; 
 
GLOBAL int 
dl1quant(uchar *inbuf,  
		 uchar *outbuf,  
		 int width,  
		 int height,  
		 int quant_to, 
		 int dither,  
		 uchar userpal[3][256]); 
 
LOCAL  void copy_pal(uchar userpal[3][256]); 
LOCAL  void dlq_init(void); 
LOCAL  int  dlq_start(void); 
LOCAL  void dlq_finish(void); 
LOCAL  int  build_table(uchar *image, ulong pixels); 
LOCAL  void fixheap(ulong id); 
LOCAL  void reduce_table(int num_colors); 
LOCAL  void set_palette(int index, int level); 
LOCAL  void closest_color(int index, int level); 
LOCAL  int  quantize_image(uchar *in, uchar *out, int width, int height,  
			   int dither); 
LOCAL  int  bestcolor(int r, int g, int b); 
 
#endif 
 
#ifdef __cplusplus 
} 
#endif