source: trunk/Jgraph/draw.c@ 660

/* 
 * $Source: /tmp_mnt/n/fs/grad1/jsp/src/jgraph/RCS/draw.c,v $
 * $Revision: 8.3 $
 * $Date: 92/11/30 11:42:10 $
 * $Author: jsp $
 */

#include "jgraph.h"
#include <stdio.h>
#include <math.h>
#include <stdlib.h> //by pzn@debian.org
#include <string.h> //by pzn@debian.org

static char real_eof = EOF;

float ctop(val, axis)
float val;
Axis axis;
{
  if (axis->is_lg) {
    if (val <= 0.0) {
      error_header();
      fprintf(stderr, 
              "Value of %f is at negative infinity with logarithmic %c axis\n", 
              val, (axis->is_x) ? 'x' : 'y'); 
      exit(1);
    }
    return (log(val) / axis->logfactor - axis->logmin) * axis->factor;
  } else {
    return (val - axis->min) * axis->factor;
  }
}

float disttop(val, axis)
float val;
Axis axis;
{
  if (axis->is_lg) {
    return FCPI * val;
  } else {
    return (val) * axis->factor;
  }
}

float intop(val)
float val;
{
  return FCPI * val;
}

#define MAXIMUM(a,b) ((a > b) ? a : b)

void draw_label(Label l)
{
  if (l->label == CNULL) return;
  comment(l->label);
  print_label(l);
}

void draw_axis(Axis a, Axis other)
{
  char orientation;
  Hash h;
  String s;

  orientation = (a->is_x) ? 'x' : 'y';
  setlinewidth(1.0);
  comment("Drawing Axis");
  if (a->grid_lines) {
    comment("Drawing Grid lines");
    gsave();
    setgray(a->gr_graytype, a->gr_gray);
    for (h = first(a->hash_lines); h != nil(a->hash_lines); h = next(h)) {
      if (h->major) {
        printline(h->loc, 0.0, h->loc, other->psize, orientation);
      }
    }
    grestore();
  }
  if (a->mgrid_lines) {
    comment("Drawing Minor Grid lines");
    gsave();
    setgray(a->mgr_graytype, a->mgr_gray);
    for (h = first(a->hash_lines); h != nil(a->hash_lines); h = next(h)) {
      if (!h->major) {
        printline(h->loc, 0.0, h->loc, other->psize, orientation);
      }
    }
    grestore();
  }
  gsave();
  setgray(a->graytype, a->gray);
  if (a->draw_axis_line) {
    printline(0.0, a->draw_at, a->psize, a->draw_at, orientation);
  }
  if (a->draw_hash_marks) {
    comment("Drawing Hash Marks");
    for (h = first(a->hash_lines); h != nil(a->hash_lines); h = next(h)) {
      printline(h->loc, a->draw_hash_marks_at, h->loc, 
                a->draw_hash_marks_at + (h->size * a->hash_scale), 
                orientation);
    }
  }
  if (a->draw_hash_labels) {
    comment("Drawing Hash Labels");
    for (s = first(a->hash_labels); s != nil(a->hash_labels); s = next(s)) {
      a->hl->label = s->s->label;
      if (a->is_x) {
        a->hl->x = s->s->x;
      } else {
        a->hl->y = s->s->y;
      }
      draw_label(a->hl);
    }
  }
  if (a->draw_axis_label) {
    comment("Drawing Axis Label");
    draw_label(a->label);
  }
  grestore();
  printf("\n");
}


void set_clip(Graph g)
{
  comment("Setting Clip");
  printf("newpath\n");
  printf(" 0 0 moveto 0 %f lineto %f %f lineto %f 0 lineto\n",
           g->y_axis->psize, g->x_axis->psize,
           g->y_axis->psize, g->x_axis->psize);
  printf("  closepath clip newpath\n");
}

void draw_curve(Curve c, Graph g);

void draw_curves(Graph g)
{
  Curve c;

  gsave();
  printf("\n");
  if (g->clip) set_clip(g);
  for(c = first(g->curves); c != nil(g->curves); c = next(c)) {
    draw_curve(c, g);
  }
  grestore();
  printf("\n");
}

void draw_mark(float x, float y, Curve c, Graph g);
void draw_arrow(float x1, float y1, float x2, float y2, Curve c);

void draw_curve(Curve c, Graph g)
{
  Point p, px, py;
  int i, j;
  float this_x, this_y, last_x, last_y, x, y;

  gsave();
  setgray(c->graytype, c->gray);
  if (c->clip) set_clip(g);
  if (first(c->xepts) != nil(c->xepts) ||
      first(c->yepts) != nil(c->yepts)) {
    comment("Drawing Epts");
    px = first(c->xepts);
    py = first(c->yepts);
    setlinewidth(c->linethick);
    setlinestyle('s', (Flist)0);
    for (p = first(c->pts); p != nil(c->pts); p = next(p)) {
      if (p->e == 'x') {
        x = ctop(p->x, g->x_axis);
        y = ctop(p->y, g->y_axis);
        print_ebar(x, y, ctop(px->x, g->x_axis), c->marksize[1]/2.0, 'x');
        px = next(px);
        print_ebar(x, y, ctop(px->x, g->x_axis), c->marksize[1]/2.0, 'x');
        px = next(px);
      } else if (p->e == 'y') {
        x = ctop(p->x, g->x_axis);
        y = ctop(p->y, g->y_axis);
        print_ebar(y, x, ctop(py->y, g->y_axis), c->marksize[0]/2.0, 'y');
        py = next(py);
        print_ebar(y, x, ctop(py->y, g->y_axis), c->marksize[0]/2.0, 'y');
        py = next(py);
      }
    }
  }

  comment("Drawing Curve");
  if (c->linetype != '0' || c->poly) {
    if (c->bezier) {
      i = 0;
      j = 0;
      if (c->poly) printf("newpath ");
      for (p = first(c->pts); p != nil(c->pts); p = next(p)) {
        if (j == 0 && i == 0) {
          start_line(ctop(p->x, g->x_axis), ctop(p->y, g->y_axis), c);
          j++;
        } else if (i != 0) {
          bezier_control(ctop(p->x, g->x_axis), ctop(p->y, g->y_axis));
        } else {
          bezier_end(ctop(p->x, g->x_axis), ctop(p->y, g->y_axis));
          j++;
        }
        if (!c->poly && j == 30 && i == 0) {
          end_line();
          p = prev(p);
          j = 0;
          i = 0;
        } else i = (i + 1) % 3;
      }
      if (j != 0) {
        if (c->poly) {
          printf("closepath ");
          setfill(0.0, 0.0, c->pfilltype, c->pfill, c->ppattern, c->pparg);
        }
        end_line();
      }
    } else {
      i = 0;
      if (c->poly) printf("newpath ");
      for (p = first(c->pts);
           p != nil(c->pts);
           p = next(p)) {
        if (i == 0) {
          start_line(ctop(p->x, g->x_axis), ctop(p->y, g->y_axis), c);
        } else {
          cont_line(ctop(p->x, g->x_axis), ctop(p->y, g->y_axis));
        } 
        if (!c->poly && i == 100 && next(p)) {
          end_line();
          p = prev(p);
          i = 0;
        } else i++;
      }
      if (i != 0) {
        if (c->poly) {
          printf("closepath ");
          setfill(0.0, 0.0, c->pfilltype, c->pfill, c->ppattern, c->pparg);
        }
        end_line();
      }
    }
  }
  comment("Drawing Curve points");
  i = 0;
  for (p = first(c->pts);
       p != nil(c->pts);
       p = next(p)) {
    this_x = ctop(p->x, g->x_axis);
    this_y = ctop(p->y, g->y_axis);
    if (!c->bezier || i == 0) draw_mark(this_x, this_y, c, g);
    if (p != first(c->pts)) {
      if (c->rarrows || (c->rarrow && p == last(c->pts))) {
        if (!c->bezier || i == 0) 
          draw_arrow(this_x, this_y, last_x, last_y, c);
      }
      if (c->larrows || (c->larrow && prev(p) == first(c->pts))) {
        if (!c->bezier || i == 1) 
          draw_arrow(last_x, last_y, this_x, this_y, c);
      }
    }
    last_x = this_x;  
    last_y = this_y;  
    i = (i + 1) % 3;
  }
  grestore();
  printf("\n");
}

void draw_mark(float x, float y, Curve c, Graph g)
{
  Point p;
  float ms0, ms1, scx, scy, trx, try;
  int i, j;
  FILE *f;
  char ch;
  int done, newline;
  char inp[100];
  int bb[4];

  if (c->marktype == 'n') return;
  ms0 = c->marksize[0] / 2.0;
  ms1 = c->marksize[1] / 2.0;

  gsave();
  printf(" %f %f translate %f rotate\n", x, y, c->mrotate);

  switch (c->marktype) {
    case 'n': break;
    case 'E': if (c->eps == CNULL) break;
              f = fopen(c->eps, "r");
              if (f == NULL) {
                fprintf(stderr, "Error: eps file %s couldn't be opened\n",
                      c->eps);
                exit(1);
              }
              /* Get bbox */
              newline = 1;
              done = 0;
              while(!done) {
                while(!newline) {
                  ch = getc(f);
                  if (ch == real_eof) {
                    fprintf(stderr, "Error: Eps file '%s' has %s\n",
                            c->eps, "no bounding box");
                    exit(1);
                  }
                  newline = (ch == '\n');
                }
                fscanf(f, "%s", inp); 
                if (strcmp(inp, "%%BoundingBox:") == 0) done = 1;
              }
              for (i = 0; i < 4; i++) {
                if (fscanf(f, "%d", &(bb[i])) == 0) {
                  fprintf(stderr, "Error: Eps file '%s': eof in %s\n",
                          c->eps, "bounding box");
                  exit(1);
                }
              }
              if (bb[2] - bb[0] == 0) {
                scx = ms0;
                trx = 0.0;
              } else {
                scx = ms0 * 2.0/(float)(bb[2] - bb[0]);
                trx = -(float)(bb[2] - bb[0])/2.0 - bb[0];
              }
              if (bb[3] - bb[1] == 0) {
                scy = ms1;
                try = 0.0;
              } else {
                scy = ms1 * 2.0/(float)(bb[3] - bb[1]);
                try = -(float)(bb[3] - bb[1])/2.0 - bb[1];
              }
              /* Don't scale if ms == 0 0 */
              if (ms0 == 0.0 && ms1 == 0.0) {
                scx = 1.0;
                scy = 1.0;
              }

              sprintf(inp, "Including eps file %s", c->eps);
              comment(inp);
              /* Use bbox to scale and translate */
                
              printf("%f %f scale %f %f translate\n", scx, scy, trx, try);
              /* Include the rest of the file */
              for (ch = getc(f); ch != real_eof; ch = getc(f)) putchar(ch);
              putchar('\n');
              fclose(f);
              break;
    case 'p': if (c->postscript == CNULL) break;
              if (ms0 != 0.0 || ms1 != 0.0) {
                printf("%f %f scale\n", ms0, ms1);
              }
              if (!c->postfile) {
                printf("%s\n", c->postscript);
              } else {
                f = fopen(c->postscript, "r");
                if (f == NULL) {
                  fprintf(stderr, 
                          "Error: postscript file %s couldn't be opened\n",
                          c->postscript);
                  exit(1);
                }
                for (ch = getc(f); ch != real_eof; ch = getc(f)) putchar(ch);
                putchar('\n');
                fclose(f);
              }
              break;
    case 'c': printline(-ms0, 0.0, ms0, 0.0, 'x');
              printline(-ms1, 0.0, ms1, 0.0, 'y');
              break;
    case 'b': start_poly(-ms0, -ms1);
              cont_poly(ms0, -ms1);
              cont_poly(ms0, ms1);
              cont_poly(-ms0, ms1);
              end_poly(x, y, c->filltype, c->fill, c->pattern, c->parg);
              break;
    case 'd': start_poly(-ms0, 0.0);
              cont_poly(0.0, -ms1);
              cont_poly(ms0, 0.0);
              cont_poly(0.0, ms1);
              end_poly(x, y, c->filltype, c->fill, c->pattern, c->parg);
              break;
    case 'g': p = first(c->general_marks);
              if (p == nil(c->general_marks)) break;
              if (next(p) == nil(c->general_marks)) break;
              start_poly(p->x*ms0, p->y*ms1);
              for(p = next(p); p != nil(c->general_marks); p = next(p))
                cont_poly(p->x*ms0, p->y*ms1);
              end_poly(x, y, c->filltype, c->fill, c->pattern, c->parg);
              break;
    case 'G': i = 0;
              for (p = first(c->general_marks);
                   p != nil(c->general_marks);
                   p = next(p)) {
                if (i == 0) {
                  printf("%f %f moveto ", p->x*ms0, p->y*ms1);
                } else {
                  printf("%f %f lineto\n", p->x*ms0, p->y*ms1);
                }
                if (i == 100) {
                  printf("stroke\n");
                  p = prev(p);
                  i = 0;
                } else i++;
              }
              if (i != 0) printf("stroke\n");
              break;
    case 'B': i = 0;
              j = 0;
              for (p = first(c->general_marks);
                   p != nil(c->general_marks);
                   p = next(p)) {
                if (j == 0 && i == 0) {
                  printf("%f %f moveto ", p->x*ms0, p->y*ms1);
                  j++;
                } else if (i != 0) {
                  printf("%f %f ", p->x*ms0, p->y*ms1);
                } else {
                  printf("%f %f curveto\n", p->x*ms0, p->y*ms1);
                  j++;
                }
                if (j == 30 && i == 0) {
                  printf(" stroke\n");
                  p = prev(p);
                  j = 0;
                  i = 0;
                } else i = (i + 1) % 3;
              }
              if (j != 0) printf(" stroke\n");
              if (! ((i == 1) || (i == 0 && j == 0))) {
                fprintf(stderr, "Error: curve %d, %s\n", c->num,
                        "wrong number of points for bezier marktype\n");
                exit(1);
              }
              break;

    case 'Z': i = 0;
              j = 0;
              for (p = first(c->general_marks);
                   p != nil(c->general_marks);
                   p = next(p)) {
                if (i == 0 && j == 0) {
                  printf("newpath %f %f moveto ", p->x*ms0, p->y*ms1);
                  j++;
                } else if (i != 0) {
                  printf("%f %f ", p->x*ms0, p->y*ms1);
                } else {
                  printf("%f %f curveto\n", p->x*ms0, p->y*ms1);
                }
                i = (i + 1) % 3;
              }
              printf("closepath ");
              setfill(x, y, c->filltype, c->fill, c->pattern, c->parg);
              printf("stroke\n");

              if (i != 1) {
                fprintf(stderr, "Error: curve %d, %s\n", c->num,
                        "wrong number of points for bezier marktype\n");
                exit(1);
              }
              break;

    case 'x': printline(-ms0, -ms1, ms0, ms1, 'x');
              printline(-ms0, ms1, ms0, -ms1, 'x');
              break;
    case 'o': printellipse(x, y, ms0, ms0, 
                           c->filltype, c->fill, c->pattern, c->parg);
              break;
    case 'e': printellipse(x, y, ms0, ms1,
                           c->filltype, c->fill, c->pattern, c->parg);
              break;
    case 't': start_poly(ms0, -ms1);
              cont_poly(0.0, ms1);
              cont_poly(-ms0, -ms1);
              end_poly(x, y, c->filltype, c->fill, c->pattern, c->parg);
              break;
    case 'X': start_poly(ms0, 0.0);
              cont_poly(-ms0, 0.0);
              cont_poly(-ms0, g->x_axis->draw_at - y);
              cont_poly(ms0, g->x_axis->draw_at - y);
              end_poly(x, y, c->filltype, c->fill, c->pattern, c->parg);
              break;
    case 'Y': start_poly(0.0, ms1);
              cont_poly(0.0, -ms1);
              cont_poly(g->y_axis->draw_at - x, -ms1);
              cont_poly(g->y_axis->draw_at - x, ms1);
              end_poly(x, y, c->filltype, c->fill, c->pattern, c->parg);
              break;
    case 'l': draw_label(c->lmark);
              break;
    default: error_header(); 
             fprintf(stderr, "Unknown mark: %c\n", c->marktype);
             break;
  }
  grestore();
}

void draw_arrow(float x1, float y1, float x2, float y2, Curve c)
{
  float dx, dy;
  float ms0;
  float theta, ct, st;
  
  
  if (c->marktype == 'o') {
    dx = x1 - x2;
    dy = y1 - y2;
    if (dx == 0.0 && dy == 0.0) return;

    ms0 = c->marksize[0] / 2.0;
    if (dx == 0.0) theta = asin(1.0); else theta = atan(dy/dx);
    if (theta < 0.0) theta = -theta;
    ct = cos(theta)*ms0;
    st = sin(theta)*ms0;
    x1 = x1 + ct*(dx > 0.0 ? -1.0 : 1.0);
    y1 = y1 + st*(dy > 0.0 ? -1.0 : 1.0);

    if ( ((x1 - x2 > 0) != (dx > 0)) || 
         ((y1 - y2 > 0) != (dy > 0)) ) return;
  }

  dx = x1 - x2;
  dy = y1 - y2;
  if (dx == 0.0 && dy == 0.0) return;

  gsave();
  printf("%f %f translate %f %f atan rotate\n", x1, y1, dy, dx);
  start_poly(0.0, 0.0);
  cont_poly(-(c->asize[0]), (c->asize[1]));
  cont_poly(-(c->asize[0]), -(c->asize[1]));
  end_poly(0.0, 0.0, c->afilltype, c->afill, c->apattern, c->aparg);
  grestore();
  printf("\n");
}

void draw_legend(Graph g)
{
  Curve c;
  Legend l;
  float x, y;
  char tmpmktype;

  l = g->legend;
  comment("Drawing legend");
  if (l->type == 'n' || l->anylines < 0) return;
  gsave();
  if (l->type == 'u') {
    printf("%f %f translate %f rotate\n", l->l->x, l->l->y, l->l->rotate);
  }
  for (c = first(g->curves); c != nil(g->curves); c = next(c)) {
    if (c->l->label != CNULL) {
      gsave();
      setgray(c->graytype, c->gray);
      y = (c->l->ymax + c->l->ymin) / 2.0;
      if (l->anylines) {
        if (c->linetype != '0' && l->linelength != 0) {
          if (l->type == 'c' && c->l->hj == 'r') {
            x = c->l->x + l->midspace;
          } else {
            x = c->l->x - l->midspace - l->linelength;
          }
          start_line(x, y, c); 
          cont_line(x+l->linelength, y);
          end_line();
        }
        tmpmktype = c->marktype;
        c->marktype = 'n';
        if (c->larrows || c->larrow) draw_arrow(x, y, x+l->linelength, y, c);
        if (c->rarrows || c->rarrow) draw_arrow(x+l->linelength, y, x, y, c);
        c->marktype = tmpmktype;
        if (l->type == 'c' && c->l->hj == 'r') {
          x = c->l->x + l->midspace + l->linelength / 2.0;
        } else {
          x = c->l->x - l->midspace - l->linelength / 2.0;
        }
      } else if (l->type == 'c' && c->l->hj == 'r') {
        x = c->l->x + l->midspace;
      } else {
        x = c->l->x - l->midspace;
      }
      if (c->marktype == 'X' || c->marktype == 'Y') {
        char old;
        old = c->marktype;
        c->marktype = 'b'; 
        draw_mark(x, y, c, g); 
        c->marktype = old;
      } else {
        draw_mark(x, y, c, g);
      }
      grestore();
      printf("\n");
      draw_label(c->l);
    }
  }
  grestore();
  printf("\n");
}

void draw_strings(Graph g)
{
  String s;

  comment("Drawing strings");
  for (s = first(g->strings); s != nil(g->strings); s = next(s))
    draw_label(s->s);
}

void draw_graph(Graph g)
{
  comment("Drawing New Graph");
  printf("%f %f translate\n", g->x_translate, g->y_translate);
  if (g->border) {
    printline(0.0, 0.0, 0.0, g->y_axis->psize, 'x');
    printline(0.0, 0.0, 0.0, g->x_axis->psize, 'y');
    printline(g->x_axis->psize, 0.0, g->x_axis->psize, g->y_axis->psize, 'x');
    printline(g->y_axis->psize, 0.0, g->y_axis->psize, g->x_axis->psize, 'y');
  }
  draw_axis(g->x_axis, g->y_axis);
  draw_axis(g->y_axis, g->x_axis);
  draw_label(g->title);
  draw_curves(g);
  draw_legend(g);
  draw_strings(g);
  printf("%f %f translate\n", - g->x_translate, - g->y_translate);

}

void draw_header(Graphs gs, int pp, int landscape);
void draw_footer(Graphs gs, int pp);

void draw_graphs(Graphs gs, int pp, int landscape)
{
  Graphs gs_p;
  Graph g;
  int page_counter=0;

  for (gs_p = first(gs); gs_p != nil(gs); gs_p = next(gs_p)) {
    page_counter++;
    draw_header(gs_p, pp, landscape);
    for (g = first(gs_p->g); g != nil(gs_p->g); g = next(g)) {
      draw_graph(g);
    }
    draw_footer(gs_p, pp);
  }
  if (pp) {
      printf("\n%%%%Trailer\n");
      printf("%%%%Pages: %i\n",page_counter);
      printf("%%%%EOF\n");
  }
}

void draw_header(Graphs gs, int pp, int landscape)
{
  FILE *f;
  char c;

  if (gs->page == 1) {
      if (pp) {
          printf("%%!PS-Adobe-3.0\n");
          printf("%%%%Pages: (atend)\n");
          printf("%%%%Creator: jgraph\n");
          printf("%%%%EndComments\n\n");
          printf("%%%%BeginProlog\n");
          printf("%%%%EndProlog\n");
          printf("%%%%BeginSetup\n");
          printf("%%%%EndSetup\n");
      } else {
          printf("%%!PS-Adobe-2.0 EPSF-1.2\n");
          printf("%%%%Creator: jgraph\n");
      }
  }

  if (pp) {
      printf("\n%%%%Page: %d %d\n", gs->page, gs->page);
      printf("%%%%BeginPageSetup\n");
      printf("%%%%EndPageSetup\n\n");
  }

  if ( (gs->page>1) && !pp ) {
      /* tring EPS with more than one page */
      fprintf(stderr, "Error: 'newpage' token is not allowed"
              " without '-P' command line option.\n");
      exit(1);
  }

  /* if (landscape) {
      printf("%%%%BoundingBox: %d %d %d %d\n", gs->bb[1], gs->bb[0],
             gs->bb[3], gs->bb[2]);
  } else {
      printf("%%%%BoundingBox: %d %d %d %d\n", gs->bb[0], gs->bb[1],
             gs->bb[2], gs->bb[3]);
  }
  printf("%%%%EndComments\n"); */

  //BEGIN added by pzn@debian.org
  { // expands the bounding box to fit characters with tilde, acute,...
    // if user has set JGRAPH_BORDER enviroment variable
    int expandborder=0;
    char *s;                          \
    s=(char *)getenv("JGRAPH_BORDER");
    if (s!=NULL) {
        expandborder=atoi(s);
    }
   if (!pp) {
    if (landscape) {
      printf("%%%%BoundingBox: %d %d %d %d\n", gs->bb[1]-expandborder,
             gs->bb[0]-expandborder, gs->bb[3]+expandborder,
             gs->bb[2]+expandborder);
    } else {
      printf("%%%%BoundingBox: %d %d %d %d\n", gs->bb[0]-expandborder,
             gs->bb[1]-expandborder, gs->bb[2]+expandborder,
             gs->bb[3]+expandborder);
    }
    printf("%%%%EndComments\n\n");
   }
  }

  if (gs->page==1)
  //reencode fonts to ISOLatin1 or other
  {   //NOTE: this is a preliminary version. It will only work with
      //      the default fonts, that are Times-Roman and Times-Bold
      // "export JGRAPH_ENCODING=ISOLatin1Encoding" will work in sh
      char *s;                          \
      s=(char *)getenv("JGRAPH_ENCODING");
      if ((s!=NULL) && (strlen(s)>0)) {
          comment("Setting font encoding by pzn@debian.org");
          printf("/Times-Bold findfont\n");
          printf("dup length dict begin\n");
          printf(" {1 index /FID ne {def} {pop pop} ifelse} forall\n");
          printf(" /Encoding %s def\n",s);
          printf(" currentdict\n");
          printf("end\n");
          printf("/Times-Bold exch definefont pop\n");
          printf("/Times-Roman findfont\n");
          printf("dup length dict begin\n");
          printf(" {1 index /FID ne {def} {pop pop} ifelse} forall\n");
          printf(" /Encoding %s def\n",s);
          printf(" currentdict\n");
          printf("end\n");
          printf("/Times-Roman exch definefont pop\n");
          comment("End of font encoding");
          printf("\n");
      }
  }
  //END added by pzn

  if (landscape) {
    printf("-90 rotate\n");
  }
  if (pp) {
    if (landscape) {
      printf("%f 0 translate\n", -(11.0 * FCPI));
      printf("%f %f translate\n",
        (((11.0 * FCPI) - (gs->bb[2] - gs->bb[0])) / 2.0) - gs->bb[0],     
        (((8.5 * FCPI) - (gs->bb[3] - gs->bb[1])) / 2.0) - gs->bb[1]);     
    } else {
      printf("%f %f translate\n",
        (((8.5 * FCPI) - (gs->bb[2] - gs->bb[0])) / 2.0) - gs->bb[0],     
        (((11.0 * FCPI) - (gs->bb[3] - gs->bb[1])) / 2.0) - gs->bb[1]);     
    }
  } else if (landscape) {
    printf("%d 0 translate\n", -gs->bb[2] - gs->bb[0]);
  }
  printf("1 setlinecap 1 setlinejoin\n");
  printf("0.700 setlinewidth\n");
  printf("0.00 setgray\n");

  printf("\n");
  printf("/Jrnd { exch cvi exch cvi dup 3 1 roll idiv mul } def\n");

  printf("/JDEdict 8 dict def\n");
  printf("JDEdict /mtrx matrix put\n");
  printf("/JDE {\n");
  printf("  JDEdict begin\n");
  printf("  /yrad exch def\n");
  printf("  /xrad exch def\n");
  printf("  /savematrix mtrx currentmatrix def\n");
  printf("  xrad yrad scale\n");
  printf("  0 0 1 0 360 arc\n");
  printf("  savematrix setmatrix\n");
  printf("  end\n");
  printf("} def\n");

  printf("/JSTR {\n");
  printf("  gsave 1 eq { gsave 1 setgray fill grestore } if\n");
  printf("    exch neg exch neg translate \n");
  printf("    clip                        \n");
  printf("    rotate                      \n");
  printf("    4 dict begin\n");
  printf("      pathbbox  /&top exch def\n");
  printf("                /&right exch def\n");
  printf("                /&bottom exch def\n");
  printf("                &right sub /&width exch def\n");
  printf("      newpath\n");
  printf("      currentlinewidth mul round dup               \n");
  printf("      &bottom exch Jrnd exch &top             \n");
  printf("      4 -1 roll currentlinewidth mul setlinewidth  \n");
  printf("      { &right exch moveto &width 0 rlineto stroke } for    \n");
  printf("    end\n");
  printf("  grestore\n");
  printf("  newpath\n");
  printf("} bind def\n");

  gsave();
  setfont("Times-Roman", 9.00);
  if (gs->preamble != CNULL) {
    if (gs->prefile) {
      f = fopen(gs->preamble, "r");
      if (f == NULL) {
        fprintf(stderr, "Error: preamble file %s couldn't be opened\n",
                gs->preamble);
        exit(1);
      }
      for (c = getc(f); c != real_eof; c = getc(f)) putchar(c);
      putchar('\n');
      fclose(f);
    } else {
      printf("%s\n", gs->preamble);
    }
  }
}

void draw_footer(Graphs gs, int pp)
{
  FILE *f;
  char c;

  if (gs->epilogue != CNULL) {
    if (gs->epifile) {
      f = fopen(gs->epilogue, "r");
      if (f == NULL) {
        fprintf(stderr, "Error: epilogue file %s couldn't be opened\n",
                gs->epilogue);
        exit(1);
      }
      for (c = getc(f); c != real_eof; c = getc(f)) putchar(c);
      putchar('\n');
      fclose(f);
    } else {
      printf("%s\n", gs->epilogue);
    }
  }
  grestore();
  if (pp) printf("showpage\n"); else printf("\n");

  if (pp) {
      printf("%%%%PageTrailer\n");
  }

}