svfb.h

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/*
 * This software is copyrighted as noted below.  It may be freely copied,
 * modified, and redistributed, provided that the copyright notice is
 * preserved on all copies.
 *
 * There is no warranty or other guarantee of fitness for this software,
 * it is provided solely "as is".  Bug reports or fixes may be sent
 * to the author, who may or may not act on them as he desires.
 *
 * You may not include this software in a program or other software product
 * without supplying the source, or without informing the end-user that the
 * source is available for no extra charge.
 *
 * If you modify this software, you should include a notice giving the
 * name of the person performing the modification, the date of modification,
 * and the reason for such modification.
 */
/*
 * svfb.h - Definitions and a few global variables for svfb.
 *
 * Author:      Spencer W. Thomas
 *              Computer Science Dept.
 *              University of Utah
 * Date:        Mon Aug  9 1982
 * Copyright (c) 1982 Spencer W. Thomas
 *
 * $Header: /cvsroot/brlcad/brlcad/include/svfb.h,v 14.2 2005/10/23 04:44:26 brlcad Exp $
 */

/* ****************************************************************
 * Dispatch table for different output types.
 */
typedef int sv_fn();
struct sv_dispatch_tab {
    char   *magic;                      /* magic type flags */
    sv_fn  *setup,                      /* startup function */
           *skipBlankLines,
           *setColor,
           *skipPixels,
           *newScanLine,
           *putdat,                     /* put a set of differing pixels */
           *putrn,                      /* put a run all the same */
           *blockHook,                  /* hook called at start of new */
                                        /* output block */
           *putEof;             /* write EOF marker (if possible) */
};

extern struct sv_dispatch_tab sv_DTable[];

/*
 * These definitions presume the existence of a variable called
 * "fileptr", declared "long * fileptr".  *fileptr should be
 * initialized to 0 before calling Setup().
 * A pointer "globals" declared "struct sv_globals * globals" is also
 * presumed to exist.
 */
#define     sv_magic            (sv_DTable[(int)globals->sv_dispatch].magic)
#define     Setup()             (*sv_DTable[(int)globals->sv_dispatch].setup)(globals)
#define     SkipBlankLines(n)   (*sv_DTable[(int)globals->sv_dispatch].skipBlankLines)(n, globals)
#define     SetColor(c)         (*sv_DTable[(int)globals->sv_dispatch].setColor)(c, globals)
#define     SkipPixels(n, l, r) (*sv_DTable[(int)globals->sv_dispatch].skipPixels)(n,l,r, globals)
#define     NewScanLine(flag)   (*sv_DTable[(int)globals->sv_dispatch].newScanLine)(flag, globals)
#define     putdata(buf, len)   (*sv_DTable[(int)globals->sv_dispatch].putdat)(buf, len, globals)
#define     putrun(val, len, f) (*sv_DTable[(int)globals->sv_dispatch].putrn)(val,len,f, globals)
#define     BlockHook()         (*sv_DTable[(int)globals->sv_dispatch].blockHook)(globals)
#define     PutEof()            (*sv_DTable[(int)globals->sv_dispatch].putEof)(globals)

/*
 * States for run detection
 */
#define DATA    0
#define RUN2    1
#define RUN3    2
#define RUN4    3
#define INRUN   -1

/*
 * Local Variables:
 * mode: C
 * tab-width: 8
 * c-basic-offset: 4
 * indent-tabs-mode: t
 * End:
 * ex: shiftwidth=4 tabstop=8
 */

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