void
HGPrintElt(ELT *element,
int /* baseline */)
{
register POINT *p1;
register POINT *p2;
register int length;
register int graylevel;
if (!DBNullelt(element) && !Nullpoint((p1 = element->ptlist))) {
/* p1 always has first point */
if (TEXT(element->type)) {
HGSetFont(element->brushf, element->size);
switch (element->size) {
case 1:
p1->y += adj1;
break;
case 2:
p1->y += adj2;
break;
case 3:
p1->y += adj3;
break;
case 4:
p1->y += adj4;
break;
default:
break;
}
HGPutText(element->type, *p1, element->textpt);
} else {
if (element->brushf) /* if there is a brush, the */
HGSetBrush(element->brushf); /* graphics need it set */
switch (element->type) {
case ARC:
p2 = PTNextPoint(p1);
tmove(p2);
doarc(*p1, *p2, element->size);
cr();
break;
case CURVE:
length = 0; /* keep track of line length */
drawwig(p1, CURVE);
cr();
break;
case BSPLINE:
length = 0; /* keep track of line length */
drawwig(p1, BSPLINE);
cr();
break;
case VECTOR:
length = 0; /* keep track of line length so */
tmove(p1); /* single lines don't get long */
while (!Nullpoint((p1 = PTNextPoint(p1)))) {
HGtline((int) (p1->x * troffscale),
(int) (p1->y * troffscale));
if (length++ > LINELENGTH) {
length = 0;
printf("\\\n");
}
} /* end while */
cr();
break;
case POLYGON:
{
/* brushf = style of outline; size = color of fill:
* on first pass (polyfill=FILL), do the interior using 'P'
* unless size=0
* on second pass (polyfill=OUTLINE), do the outline using a series
* of vectors. It might make more sense to use \D'p ...',
* but there is no uniform way to specify a 'fill character'
* that prints as 'no fill' on all output devices (and
* stipple fonts).
* If polyfill=BOTH, just use the \D'p ...' command.
*/
double firstx = p1->x;
double firsty = p1->y;
length = 0; /* keep track of line length so */
/* single lines don't get long */
if (polyfill == FILL || polyfill == BOTH) {
/* do the interior */
char command = (polyfill == BOTH && element->brushf) ? 'p' : 'P';
/* include outline, if there is one and */
/* the -p flag was set */
/* switch based on what gremlin gives */
switch (element->size) {
case 1:
graylevel = 1;
break;
case 3:
graylevel = 2;
break;
case 12:
graylevel = 3;
break;
case 14:
graylevel = 4;
break;
case 16:
graylevel = 5;
break;
case 19:
graylevel = 6;
break;
case 21:
graylevel = 7;
break;
case 23:
graylevel = 8;
break;
default: /* who's giving something else? */
graylevel = NSTIPPLES;
break;
}
/* int graylevel = element->size; */
if (graylevel < 0)
break;
if (graylevel > NSTIPPLES)
graylevel = NSTIPPLES;
printf("\\D'Fg %.3f'",
double(1000 - stipple_index[graylevel]) / 1000.0);
cr();
tmove(p1);
printf("\\D'%c", command);
while (!Nullpoint((PTNextPoint(p1)))) {
p1 = PTNextPoint(p1);
deltax((double) p1->x);
deltay((double) p1->y);
if (length++ > LINELENGTH) {
length = 0;
printf("\\\n");
}
} /* end while */
/* close polygon if not done so by user */
if ((firstx != p1->x) || (firsty != p1->y)) {
deltax((double) firstx);
deltay((double) firsty);
}
putchar('\'');
cr();
break;
}
/* else polyfill == OUTLINE; only draw the outline */
if (!(element->brushf))
break;
length = 0; /* keep track of line length */
tmove(p1);
while (!Nullpoint((PTNextPoint(p1)))) {
p1 = PTNextPoint(p1);
HGtline((int) (p1->x * troffscale),
(int) (p1->y * troffscale));
if (length++ > LINELENGTH) {
length = 0;
printf("\\\n");
}
} /* end while */
/* close polygon if not done so by user */
if ((firstx != p1->x) || (firsty != p1->y)) {
HGtline((int) (firstx * troffscale),
(int) (firsty * troffscale));
}
cr();
break;
} /* end case POLYGON */
} /* end switch */
} /* end else Text */
} /* end if */
} /* end PrintElt */
void
conv(register FILE *fp)
{
register int c, k;
int m, n, n1, m1;
char str[4096], buf[4096];
while ((c = getc(fp)) != EOF) {
switch (c) {
case '\n': /* when input is text */
case ' ':
case 0: /* occasional noise creeps in */
break;
case '{': /* push down current environment */
t_push();
break;
case '}':
t_pop();
break;
case '0': case '1': case '2': case '3': case '4':
case '5': case '6': case '7': case '8': case '9':
/* two motion digits plus a character */
hmot((c-'0')*10 + getc(fp)-'0');
put1(getc(fp));
break;
case 'c': /* single ascii character */
put1(getc(fp));
break;
case 'C':
sget(str, sizeof str, fp);
put1s(str);
break;
case 't': /* straight text */
fgets(buf, sizeof(buf), fp);
t_text(buf);
break;
case 'D': /* draw function */
fgets(buf, sizeof(buf), fp);
switch (buf[0]) {
case 'l': /* draw a line */
sscanf(buf+1, "%d %d", &n, &m);
drawline(n, m, ".");
break;
case 'c': /* circle */
sscanf(buf+1, "%d", &n);
drawcirc(n);
break;
case 'e': /* ellipse */
sscanf(buf+1, "%d %d", &m, &n);
drawellip(m, n);
break;
case 'a': /* arc */
sscanf(buf+1, "%d %d %d %d", &n, &m, &n1, &m1);
drawarc(n, m, n1, m1);
break;
case '~': /* wiggly line */
drawwig(buf+1);
break;
default:
error(FATAL, "unknown drawing function %s\n", buf);
break;
}
break;
case 's':
fscanf(fp, "%d", &n);
if (n == -23) {
float f;
fscanf(fp, "%f", &f);
setsize(f);
} else
setsize(t_size(n));/* ignore fractional sizes */
break;
case 'f':
sget(str, sizeof str, fp);
setfont(t_font(str));
break;
case 'H': /* absolute horizontal motion */
/* fscanf(fp, "%d", &n); */
while ((c = getc(fp)) == ' ')
;
k = 0;
do {
k = 10 * k + c - '0';
} while (isdigit(c = getc(fp)));
ungetc(c, fp);
hgoto(k);
break;
case 'h': /* relative horizontal motion */
/* fscanf(fp, "%d", &n); */
while ((c = getc(fp)) == ' ')
;
k = 0;
do {
k = 10 * k + c - '0';
} while (isdigit(c = getc(fp)));
ungetc(c, fp);
hmot(k);
break;
case 'w': /* word space */
putc(' ', stdout);
break;
case 'V':
fscanf(fp, "%d", &n);
vgoto(n);
break;
case 'v':
fscanf(fp, "%d", &n);
vmot(n);
break;
case 'p': /* new page */
fscanf(fp, "%d", &n);
t_page(n);
break;
case 'n': /* end of line */
while (getc(fp) != '\n')
;
t_newline();
break;
case '#': /* comment */
while (getc(fp) != '\n')
;
break;
case 'x': /* device control */
devcntrl(fp);
break;
default:
error(!FATAL, "unknown input character %o %c\n", c, c);
done();
}
}
}