color.h

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/* $Id$ $Revision$ */
/* vim:set shiftwidth=4 ts=8: */

/*************************************************************************
 * Copyright (c) 2011 AT&T Intellectual Property 
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors: See CVS logs. Details at http://www.graphviz.org/
 *************************************************************************/

#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