/*
 * $Id: fig.trm%v 3.50 1993/07/09 05:35:24 woo Exp $
 */

/* GNUPLOT - fig.trm */
/*
 * Copyright (C) 1990, 1991, 1992
 *
 * 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 modified code.  Modifications are to be distributed
 * as patches to released version.
 *
 * This software  is provided "as is" without express or implied warranty.
 *
 * This file is included by ../term.c.
 *
 * This terminal driver supports:
 *  Fig graphics language
 *
 * AUTHORS
 *  Micah Beck, David Kotz
 *
 * send your comments or suggestions to (info-gnuplot@dartmouth.edu).
 *
 */

#ifdef MSDOS
#define long int
#endif /* MSDOS */

/*
 * Original for Fig code output by Micah Beck, 1989
 * Department of Computer Science, Cornell University
 * Updated by David Kotz for gnuplot 2.0
 * More efficient output by Ian Dall
 * Updated to FIG 2.1 (with color) format by Vivek Khera
 */
#include "object.h"                     /* from the XFig distribution */
#define FIG_DEFAULT DEFAULT
#define FIG_ROMAN_FONT (0)	/* actually, the default font */
 
#ifndef FIG_RES
/* Must be 80 for the Fig editor, but may be increased if used
 * only by TransFig filters.
 * Represents pixels per inch.
 */
#define FIG_RES         (80)
#endif
 
#define FIG_COORD_SYS   2
 
#define FIG_MAGIC       "#FIG 2.1"
#define FIG_HTIC        (5*FIG_RES/80)
#define FIG_VTIC        (5*FIG_RES/80)
#define FIG_FONT_S      (10)	/* size in points */
#define FIG_VCHAR       (FIG_FONT_S*72/FIG_RES) /* height of font in pixels */
#define FIG_HCHAR       (FIG_VCHAR*6/10) /* this is a guess at the width */
#define FIG_ARROW_WIDTH (FIG_HTIC/2 + 1)
#define FIG_ARROW_HEIGHT FIG_HTIC
 
static long FIG_xbase = FIG_RES/2;
static long FIG_ybase = FIG_RES/2;
 
static long FIG_posx;
static long FIG_posy;
static int FIG_poly_vec_cnt;
enum FIG_poly_stat {FIG_poly_new, FIG_poly_part};
static enum FIG_poly_stat FIG_polyvec_stat;
/* 5 inches wide by 3 inches high */
#define FIG_XMAX (5 * FIG_RES)
#define FIG_YMAX (3 * FIG_RES)
 
#define FIG_XOFF (FIG_RES/4)
#define FIG_YOFF (FIG_RES/4)
 
static int FIG_type;            /* negative types use real lines */
static float FIG_spacing;       /* length of dash or dot spacing */
static int FIG_justify;         /* Fig justification T_*_JUSTIFIED */
static float FIG_angle;         /* Fig text angle 0=horiz, Pi/2=vert */
static int FIG_use_color = FALSE;	/* do we use color or not? */
static int FIG_color = DEFAULT;	/* which color to use */
 
#define FIG_POINT_TYPES POINT_TYPES /* we use the same points */
 
static
  FIG_poly_clean(stat)
enum FIG_poly_stat stat;
{
  if(stat == FIG_poly_part)
        fprintf(outfile, " 9999 9999\n");
  FIG_polyvec_stat = FIG_poly_new;
}
 
FIG_options()
{
	FIG_use_color = FALSE;	/* assumption */

	if (!END_OF_COMMAND) {
		if (almost_equals(c_token,"m$onochrome")) {
			FIG_use_color=FALSE;
			c_token++;
		}
		else if (almost_equals(c_token,"c$olor")) {
			FIG_use_color=TRUE;
			c_token++;
		}
	}

	sprintf(term_options,"%s", FIG_use_color ? "color" : "monochrome");
}

FIG_init()
{
    FIG_posx = FIG_posy = 0;
    FIG_polyvec_stat = FIG_poly_new;
    FIG_linetype(-1);
    FIG_justify_text(LEFT);
    FIG_text_angle(0);
 
    fprintf(outfile, "%s\n", FIG_MAGIC);
    fprintf(outfile, "%d %d\n", FIG_RES, FIG_COORD_SYS);
}
 
 
FIG_graphics()
{
    FIG_posx = FIG_posy = 0;
    FIG_polyvec_stat = FIG_poly_new;
    /* there is no way to have separate pictures in a FIG file */
}
 
 
FIG_text()
{
    /* there is no way to have separate pictures in a FIG file */
    FIG_poly_clean(FIG_polyvec_stat);
    FIG_posx = FIG_posy = 0;
    fflush(outfile);
}
 
 
/* Line types for FIG work like this:
 *  for monochrome:
 *  -2 : solid (border)
 *  -1 : dotted 4 (axes)
 *   0 : solid (first curve)
 *   1 : dotted 3
 *   2 : dashed 3
 *   3 : dotted 6
 *   4 : dashed 6
 *   ... ...
 *  for color, cycle through colors. once colors are used up, repeat colors
 *   but start using dashed lines of different dash length. don't use white
 *   as a color.
 */
 
FIG_linetype(linetype)
        int linetype;                   /* expect linetype >= -2 */
{
    int last_FIG_type = FIG_type;
    int last_FIG_spacing = FIG_spacing;
    switch (linetype) {
           case 0:
           case -2: {
                  FIG_type = SOLID_LINE;
                  FIG_spacing = 0.0;
		  if (FIG_use_color) FIG_color = BLACK;
                  break;
           }
           case -1: {
                  FIG_type = DOTTED_LINE;
                  FIG_spacing = 4.0; /* gap */
		  if (FIG_use_color) FIG_color = BLACK;
                  break;
           }
           default: {
                linetype = abs(linetype); /* shouldn't be negative anyway */
                /* now linetype >= 1 */
		if (FIG_use_color) {
		  FIG_type = (linetype >= WHITE);	/* dashed line */
		  FIG_color = linetype % WHITE;
		  FIG_spacing = (linetype / WHITE) * 3;
		} else { /* monochrome */
                  FIG_type = linetype % 2 + 1; /* dotted, dashed, ... */
                  FIG_spacing = (linetype+1) / 2 * 3;
		}
                  break;
           }
    }
    if (FIG_type != last_FIG_type || FIG_spacing != last_FIG_spacing)
      FIG_poly_clean(FIG_polyvec_stat);
}
 
FIG_move(x,y)
        unsigned int x,y;
{
    int last_FIG_posx = FIG_posx;
    int last_FIG_posy = FIG_posy;
    FIG_posx = x;
    FIG_posy = y;
    if (FIG_posx != last_FIG_posx || FIG_posy != last_FIG_posy)
          FIG_poly_clean(FIG_polyvec_stat);
}
 
 
FIG_vector(ux,uy)
     unsigned int ux,uy;
{
  int x=ux, y=uy;
 
  if (FIG_polyvec_stat != FIG_poly_part)
    {
      fprintf(outfile, "%d %d %d %d %d %d %d %d %6.3f %d %d %d\n",
              O_POLYLINE, T_POLYLINE,
              FIG_type, 1, FIG_color, 0, FIG_DEFAULT, 0, FIG_spacing, 0,0,0);
      fprintf(outfile, "%d %d",
              FIG_XOFF + FIG_posx, FIG_YMAX + FIG_YOFF - FIG_posy);
      FIG_poly_vec_cnt = 1;
      FIG_polyvec_stat = FIG_poly_part;
    }
  fprintf(outfile, " %d %d",
          FIG_XOFF +  x, FIG_YMAX + FIG_YOFF-y);
  FIG_poly_vec_cnt++;
  if (FIG_poly_vec_cnt > 50)
    FIG_poly_clean(FIG_polyvec_stat);
 
  FIG_posx = x;
  FIG_posy = y;
}
 
 
FIG_arrow(sx, sy, ex, ey, head)
        int sx, sy;     /* start coord */
        int ex, ey;     /* end coord */
	TBOOLEAN head;
{
	FIG_poly_clean(FIG_polyvec_stat);
        fprintf(outfile, "%d %d %d %d %d %d %d %d %6.3f %d  %d %d\n",
                O_POLYLINE, T_POLYLINE,
                FIG_type, 1, FIG_color, 0, FIG_DEFAULT, 0, FIG_spacing,
		0, head ? 1 : 0, 0);
        /* arrow line */
	if ( head )
	        fprintf(outfile, "%d %d %.3f %.3f %.3f\n",
        	        0, 0, 1.0,
			(double)FIG_ARROW_WIDTH, (double)FIG_ARROW_HEIGHT);
        fprintf(outfile, "%d %d %d %d 9999 9999\n",
                FIG_XOFF + sx, FIG_YOFF + FIG_YMAX - sy,
		FIG_XOFF + ex, FIG_YOFF + FIG_YMAX - ey);
 
        FIG_posx = ex;
        FIG_posy = ey;
}
 
 
FIG_put_text(x, y, str)
        int x, y;
        char *str;
{
  if (strlen(str) == 0) return;
  FIG_poly_clean(FIG_polyvec_stat);
  y -= FIG_VCHAR/2;	/* assuming vertical center justified */
 
    fprintf(outfile, "%d %d %d %d %d %d %d %6.3f %d %d %d %d %d %s\01\n",
                  O_TEXT, FIG_justify,
                  FIG_ROMAN_FONT, FIG_FONT_S, FIG_DEFAULT, FIG_DEFAULT, 0,
		  FIG_angle, SPECIAL_TEXT, FIG_VCHAR, FIG_HCHAR*strlen(str),
		  FIG_XOFF + x, FIG_YMAX + FIG_YOFF-y, str);
}
 
int FIG_justify_text(mode)
        enum JUSTIFY mode;
{
    switch(mode) {
           case LEFT: FIG_justify = T_LEFT_JUSTIFIED; break;
           case CENTRE: FIG_justify = T_CENTER_JUSTIFIED; break;
           case RIGHT: FIG_justify = T_RIGHT_JUSTIFIED; break;
           /* shouldn't happen */
           default: FIG_justify = T_LEFT_JUSTIFIED; return (FALSE); break;
    }
    return (TRUE);
}
 
int FIG_text_angle(angle)
        int angle;
{
    if (angle)
         FIG_angle = Pi / 2.0;  /* vertical is pi/2 radians */
    else
         FIG_angle = 0.0;               /* horizontal */
    return (TRUE);
}
 
FIG_reset()
{
    FIG_poly_clean(FIG_polyvec_stat);
    FIG_posx = FIG_posy = 0;
    fflush(outfile);
}

#ifdef MSDOS
#undef long
#endif /* MSDOS */