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Initial revision

/* $Id: driver.h,v 1.9 1998/06/18 14:59:19 ddenholm Exp $ */

/* GNUPLOT - driver.h  $Id: driver.h,v 1.9 1998/06/18 14:59:19 ddenholm Exp $ */

/*[
 * Copyright 1986 - 1993, 1998   Thomas Williams, Colin Kelley
 *
 * Permission to use, copy, and distribute this software and its
 * documentation for any purpose with or without fee is hereby granted,
 * provided that the above copyright notice appear in all copies and
 * that both that copyright notice and this permission notice appear
 * in supporting documentation.
 *
 * Permission to modify the software is granted, but not the right to
 * distribute the complete modified source code.  Modifications are to
 * be distributed as patches to the released version.  Permission to
 * distribute binaries produced by compiling modified sources is granted,
 * provided you
 *   1. distribute the corresponding source modifications from the
 *    released version in the form of a patch file along with the binaries,
 *   2. add special version identification to distinguish your version
 *    in addition to the base release version number,
 *   3. provide your name and address as the primary contact for the
 *    support of your modified version, and
 *   4. retain our contact information in regard to use of the base
 *    software.
 * Permission to distribute the released version of the source code along
 * with corresponding source modifications in the form of a patch file is
 * granted with same provisions 2 through 4 for binary distributions.
 *
 * This software is provided "as is" without express or implied warranty
 * to the extent permitted by applicable law.
]*/


#ifndef TERM_DRIVER_H
#define TERM_DRIVER_H

#if 0
/* Dangerous; putc may already be defined as fputc */
/* corey@cac added the next line for efficiency */
#define fputc putc
#endif

/* functions provided by in term.c */

void do_point __PROTO((unsigned int x, unsigned int y, int number));
void line_and_point __PROTO((unsigned int x, unsigned int y, int number));
void do_arrow __PROTO((unsigned int sx, unsigned int sy, unsigned int ex, unsigned int ey, int head));
int null_text_angle __PROTO((int ang));
int null_justify_text __PROTO((enum JUSTIFY just));
int null_scale __PROTO((double x, double y));
int do_scale __PROTO((double x, double y));
void options_null __PROTO((void));
void UNKNOWN_null __PROTO((void));
int set_font_null __PROTO((char *s));
void null_set_pointsize __PROTO((double size));

extern FILE *gpoutfile;
extern struct termentry *term;
extern float xsize, ysize;

/* for use by all drivers */
#ifndef NEXT
#define sign(x) ((x) >= 0 ? 1 : -1)
#else
/* it seems that sign as macro causes some conflict with precompiled headers */
static int sign(int x)
{
    return x >= 0 ? 1 : -1;
}
#endif /* NEXT */

/* abs as macro is now uppercase, there are conflicts with a few C compilers
   that have abs as macro, even though ANSI defines abs as function
   (int abs(int)). Most calls to ABS in term/ could be changed to abs if
   they use only int arguments and others to fabs, but for the time being,
   all calls are done via the macro */
#ifndef ABS
# define ABS(x) ((x) >= 0 ? (x) : -(x))
#endif /* ABS */

/*  GPMIN/GPMAX are already defined in "plot.h"  */

#define NICE_LINE		0
#define POINT_TYPES		6

#endif /* TERM_DRIVER_H */