/* $Id: color.h,v 1.5 2006/12/07 23:42:18 erg Exp $ $Revision: 1.5 $ */
/* vim:set shiftwidth=4 ts=8: */

/**********************************************************
*      This software is part of the graphviz package      *
*                http://www.graphviz.org/                 *
*                                                         *
*            Copyright (c) 1994-2004 AT&T Corp.           *
*                and is licensed under the                *
*            Common Public License, Version 1.0           *
*                      by AT&T Corp.                      *
*                                                         *
*        Information and Software Systems Research        *
*              AT&T Research, Florham Park NJ             *
**********************************************************/

#ifndef GV_COLOR_H
#define GV_COLOR_H

/* #include "arith.h" */

#ifdef __cplusplus
extern "C" {
#endif

typedef struct hsvrgbacolor_t {
    char *name;
    unsigned char h, s, v;
    unsigned char r, g, b, a;
} hsvrgbacolor_t;

/* possible representations of color in gvcolor_t */
typedef enum { HSVA_DOUBLE, RGBA_BYTE, RGBA_WORD, CMYK_BYTE,
		RGBA_DOUBLE, COLOR_STRING, COLOR_INDEX } color_type_t;

/* gvcolor_t can hold a color spec in a choice or representations */
typedef struct color_s {
    union {
	double RGBA[4];
	double HSVA[4];
	unsigned char rgba[4];
	unsigned char cmyk[4];
	int rrggbbaa[4];
	char *string;
	int index;
    } u;
    color_type_t type;
} gvcolor_t;

#define COLOR_MALLOC_FAIL -1
#define COLOR_UNKNOWN 1
#define COLOR_OK 0

#ifdef __cplusplus
}
#endif
#endif
