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/*
 * This file is distributed with Ghostscript, but its author,
 * Tanmoy Bhattacharya (tanmoy@qcd.lanl.gov) hereby places it in the
 * public domain.
 *
 * The contents of this file were derived (indeed, largely copied) from
 * the file image.h on SGI's file server; there is no copyright on that file.
 */

/* $Id: gdevsgi.h,v 1.3 2002/02/21 22:24:52 giles Exp $*/
/* SGI raster file definitions */

#ifndef gdevsgi_INCLUDED
#  define gdevsgi_INCLUDED

#define IMAGIC  0732

/* colormap of images */
#define CM_NORMAL               0
#define CM_DITHERED             1
#define CM_SCREEN               2
#define CM_COLORMAP             3
#define TYPEMASK                0xff00
#define BPPMASK                 0x00ff
#define ITYPE_VERBATIM          0x0000
#define ITYPE_RLE               0x0100
#define ISRLE(type)             (((type) & 0xff00) == ITYPE_RLE)
#define ISVERBATIM(type)        (((type) & 0xff00) == ITYPE_VERBATIM)
#define BPP(type)               ((type) & BPPMASK)
#define RLE(bpp)                (ITYPE_RLE | (bpp))
#define VERBATIM(bpp)           (ITYPE_VERBATIM | (bpp))
#define IBUFSIZE(pixels)        ((pixels+(pixels>>6))<<2)
#define RLE_NOP                 0x00

#define ierror(p)               (((p)->flags&_IOERR)!=0)
#define ifileno(p)              ((p)->file)
#define getpix(p)               (--(p)->cnt>=0 ? *(p)->ptr++ : ifilbuf(p))
#define putpix(p,x)             (--(p)->cnt>=0 \
                                    ? ((int)(*(p)->ptr++=(unsigned)(x))) \
                                    : iflsbuf(p,(unsigned)(x)))

typedef struct {
    unsigned short      imagic;         /* stuff saved on disk . . */
    unsigned short      type;
    unsigned short      dim;
    unsigned short      xsize;
    unsigned short      ysize;
    unsigned short      zsize;
    unsigned long       min_color;
    unsigned long       max_color;
    unsigned long       wastebytes;     
    char                name[80];
    unsigned long       colormap;

    long                file;           /* stuff used in core only */
    unsigned short      flags;
    short               dorev;
    short               x;
    short               y;
    short               z;
    short               cnt;
    unsigned short      *ptr;
    unsigned short      *base;
    unsigned short      *tmpbuf;
    unsigned long       offset;
    unsigned long       rleend;         /* for rle images */
    unsigned long       *rowstart;      /* for rle images */
    long                *rowsize;       /* for rle images */
} IMAGE;

#endif                          /* gdevsgi_INCLUDED */