/*
 * $Id: $
 */

/* GNUPLOT -- gnugraph.trm */

/*[
 * Copyright 1993, 1998
 *
 * 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.
]*/

/*
 * This file is included by ../term.c.
 *
 * This terminal driver supports:
 *  GNU plot(5) graphics language
 *
 * AUTHORS
 *  Tony Richardson from the unixplot.trm by Colin Kelley, Thomas Williams,
 *  and Russell Lang and from post.trm by Russell Lang.
 * 
 * send your comments or suggestions to (info-gnuplot@ames.arc.nasa.gov).
 */

/*
 * adapted to the new terminal layout by Stefan Bodewig (Dec. 1995)
 */

/*
 * This version of the 'unixplot' driver produces device independent
 * output.  I've chosen parameter values so that the PostScript output
 * produced by plot2ps is 5" x 3".  You can use the 'set size' command
 * to get output up to 8.25" x 8.25", i.e. size values larger than
 * 1 are okay.
 */

/*
Unixplot library writes to stdout.  A fix was put in place by
..!arizona!naucse!jdc to let set term and set output redirect
stdout.  All other terminals write to gpoutfile.
*/

/* This is a device independent format, so the output should look
 * look "reasonable" on any output device.  I set things up there so
 * that the output of plot2ps is 5" x 3" (standard GNUPLOT size).
 * You can use GNUPLOT's size command to obtain plots to almost the
 * 8.25" x 8.25" limit.
 */

#include "driver.h"

#ifdef TERM_REGISTER
register_term(unixplot)
#endif

#ifdef TERM_PROTO
TERM_PUBLIC void UP_options __PROTO((void));
TERM_PUBLIC void UP_init __PROTO((void));
TERM_PUBLIC void UP_graphics __PROTO((void));
TERM_PUBLIC void UP_text __PROTO((void));
TERM_PUBLIC void UP_linetype __PROTO((int linetype));
TERM_PUBLIC void UP_move __PROTO((unsigned int x, unsigned int y));
TERM_PUBLIC void UP_vector __PROTO((unsigned int x, unsigned int y));
TERM_PUBLIC void UP_put_text __PROTO((unsigned int x, unsigned int y, char str[]));
TERM_PUBLIC int UP_text_angle __PROTO((int ang));
TERM_PUBLIC int UP_justify_text __PROTO((enum JUSTIFY mode));
TERM_PUBLIC void UP_reset __PROTO((void));
#define UP_XMAX 19859
#define UP_YMAX 11565
/* UP_VCHAR = ((UP_FONTSIZE*UP_YMAX)/(UP_YINCHES*72)) 
            = UP_FONTSIZE*UP_VFONTSC
   UP_HCHAR = ((UP_FONTSIZE/2)*UP_XMAX)/(UP_XINCHES*72))
            = UP_FONTSIZE*UP_HFONTSC
*/

#define UP_VFONTSC  53.5
#define UP_VCHAR    535		/* 10 * VFONTSC */
#define UP_HFONTSC  27.6
#define UP_HCHAR    276		/* 10 * HFONTSC */

#define UP_VTIC (UP_YMAX/80)
#define UP_HTIC (UP_XMAX/80)
#endif /* TERM_PROTO */

#ifndef TERM_PROTO_ONLY
#ifdef TERM_BODY


char up_font[MAX_ID_LEN+1] = "Courier";	/* name of font */
int up_fontsize = 10;

/* plot2ps produces a 8.25" x 8.25" square. */
#define UP_SCREENX 32768
#define UP_SCREENY 32768
#define UP_SCRXINC 8.25
#define UP_SCRYINC 8.25

/* We want a 5" x 3" graph by default. */
#define UP_XINCHES 5
#define UP_YINCHES 3
/* UP_XMAX = (UP_SCREENX*UP_XINCHES)/UP_SCRXINC
   UP_YMAX (UP_SCREENY*UP_YINCHES)/UP_SCRYINC */

#define UP_XLAST (UP_XMAX - 1)
#define UP_YLAST (UP_YMAX - 1)

/* These offsets center plot2ps output in the middle of the page.  The
 * amount of resizing that can be done is limited. */
/*
 * #define UP_XOFF 6454
 * #define UP_YOFF 10601
 */

/* These offsets give a 1" offset from the lower left corner.  This
 * gives a greater range of permissible values in GNUPLOT's size
 * command. */
#define UP_XOFF 3972
#define UP_YOFF 3972

enum JUSTIFY up_justify = LEFT;

#ifdef GNU_PLOTUTILS
# define ROTATE(angle) textangle(90*angle)
#else
# define ROTATE(angle) rotate(0,0,90*angle)
#endif

#ifdef GNU_PLOTUTILS
/* We don't include plot.h from plotutils because of
 * the name clash with ../plot.h.
 */
extern int openpl __PROTO((void));
extern int space __PROTO((int, int, int, int));
extern int fontname __PROTO((const char *));
extern int fontsize __PROTO((int));
extern int erase __PROTO((void));
extern int linemod __PROTO((const char *));
extern int move __PROTO((int, int));
extern int cont __PROTO((int, int));
extern int alabel __PROTO((int, int, const char *));
extern int textangle __PROTO((int));
extern int closepl __PROTO((void));
#endif

TERM_PUBLIC void UP_options()
{
    if (!END_OF_COMMAND) {
	if (almost_equals(c_token, "d$efault")) {
	    strcpy(up_font, "Courier");
	    up_fontsize = 10;
	    term->v_char = (unsigned int) (up_fontsize * UP_VFONTSC);
	    term->h_char = (unsigned int) (up_fontsize * UP_HFONTSC);
	    c_token++;
	}
    }
    if (!END_OF_COMMAND && isstring(c_token)) {
	quote_str(up_font, c_token, MAX_ID_LEN);
	c_token++;
    }
    if (!END_OF_COMMAND) {
	/* We have font size specified */
	struct value a;
	up_fontsize = (int) real(const_express(&a));
	term->v_char = (unsigned int) (up_fontsize * UP_VFONTSC);
	term->h_char = (unsigned int) (up_fontsize * UP_HFONTSC);
    }
    sprintf(term_options, "\"%s\" %d", up_font, up_fontsize);
}

TERM_PUBLIC void UP_init()
{
    openpl();
    space(0, 0, UP_SCREENX - 1, UP_SCREENY - 1);
    fontname(up_font);
/*
#ifdef GNU_PLOTUTILS
	fontsize((int)((up_fontsize / 72.0 * 8.0) * (UP_SCREENY-1)));
#else
*/
    fontsize(up_fontsize);
/*
#endif
*/
}


TERM_PUBLIC void UP_graphics()
{
    erase();
}


TERM_PUBLIC void UP_text()
{
    /* Flush here so that output will be complete. */
    fflush(stdout);
}


TERM_PUBLIC void UP_linetype(linetype)
int linetype;
{
    static char *lt[2+5] = { "solid", "longdashed", "solid", "dotted",
			     "shortdashed", "dotdashed", "longdashed"};

    if (linetype >= 5)
	linetype %= 5;
    linemod(lt[linetype + 2]);
}


TERM_PUBLIC void UP_move(x, y)
unsigned int x, y;
{
    move(x + UP_XOFF, y + UP_YOFF);
}


TERM_PUBLIC void UP_vector(x, y)
unsigned int x, y;
{
    cont(x + UP_XOFF, y + UP_YOFF);
}


TERM_PUBLIC void UP_put_text(x, y, str)
unsigned int x, y;
char str[];
{
    UP_move(x, y);		/* Don't adjust x and y! It's done in UP_move. */
    switch (up_justify) {
    case LEFT:
	alabel('l', 'c', str);
	break;
    case CENTRE:
	alabel('c', 'c', str);
	break;
    case RIGHT:
	alabel('r', 'c', str);
	break;
    }

}

TERM_PUBLIC int UP_text_angle(ang)
int ang;
{
    ROTATE(ang);
    return TRUE;
}

TERM_PUBLIC int UP_justify_text(mode)
enum JUSTIFY mode;
{
    up_justify = mode;
    return TRUE;
}

TERM_PUBLIC void UP_reset()
{
    closepl();
}

#endif /* TERM_BODY */

#ifdef TERM_TABLE

TERM_TABLE_START(unixplot_driver)
    "unixplot", "GNU plot(1) format [\042fontname\042 font_size]",
    UP_XMAX, UP_YMAX, UP_VCHAR, UP_HCHAR,
    UP_VTIC, UP_HTIC, UP_options, UP_init, UP_reset,
    UP_text, null_scale, UP_graphics, UP_move, UP_vector,
    UP_linetype, UP_put_text, UP_text_angle,
    UP_justify_text, line_and_point, do_arrow, set_font_null
TERM_TABLE_END(unixplot_driver)

#undef LAST_TERM
#define LAST_TERM unixplot_driver

#endif /* TERM_TABLE */
#endif /* TERM_PROTO_ONLY */

#ifdef TERM_HELP
START_HELP(unixplot)
"1 unixplot",
"?commands set terminal unixplot",
"?set terminal unixplot",
"?set term unixplot",
"?terminal unixplot",
"?term unixplot",
"?unixplot",
" The `unixplot` driver produces device-independent output in the GNU plot",
" graphics language.  The default size of the PostScript results generated by",
" \"plot2ps\" is 5 x 3 inches; this can be increased up to about 8.25 x 8.25 by",
" `set size`.",
"",
" Syntax:",
"       set terminal unixplot {\"<fontname>\"} {<fontsize>}",
"",
" which defaults to 10-point \"Courier\".",
"",
" There is a non-GNU version of the `unixplot` driver which cannot be compiled",
" unless this version is left out."
END_HELP(unixplot)
#endif