--- ray/src/common/font.c	1992/06/06 07:38:40	2.1
+++ ray/src/common/font.c	1993/05/14 11:30:17	2.7
@@ -17,6 +17,8 @@ static char SCCSid[] = "$SunId$ LBL";
 
 extern char  *libpath;			/* list of library directories */
 
+extern char  *fgetword();
+
 static FONT	*fontlist = NULL;	/* list of loaded fonts */
 
 
@@ -27,9 +29,10 @@ char  *fname;
 	char  buf[16];
 	FILE  *fp;
 	char  *pathname, *err;
+	unsigned  wsum, hsum, ngly;
 	int  gn, ngv;
 	register int  gv;
-	register GLYPH  *g;
+	register GLYPH	*g;
 	GORD  *gp;
 	register FONT  *f;
 
@@ -50,11 +53,12 @@ char  *fname;
 				pathname);
 		error(SYSTEM, errmsg);
 	}
+	wsum = hsum = ngly = 0;
 	while (fgetword(buf,sizeof(buf),fp) != NULL) {	/* get each glyph */
 		if (!isint(buf))
 			goto nonint;
 		gn = atoi(buf);
-		if (gn < 0 || gn > 255) {
+		if (gn < 1 || gn > 255) {
 			err = "illegal";
 			goto fonterr;
 		}
@@ -71,7 +75,7 @@ char  *fname;
 		if (g == NULL)
 			goto memerr;
 		g->nverts = ngv;
-		g->start = g->width = 128;
+		g->left = g->right = g->top = g->bottom = 128;
 		ngv *= 2;
 		gp = gvlist(g);
 		while (ngv--) {
@@ -82,16 +86,30 @@ char  *fname;
 				goto fonterr;
 			}
 			*gp++ = gv;
-			if (ngv & 1)		/* follow x limits */
-				if (gv < g->start)
-					g->start = gv;
-				else if (gv > g->width)
-					g->width = gv;
+			if (ngv & 1) {		/* follow x limits */
+				if (gv < g->left)
+					g->left = gv;
+				else if (gv > g->right)
+					g->right = gv;
+			} else {		/* follow y limits */
+				if (gv < g->bottom)
+					g->bottom = gv;
+				else if (gv > g->top)
+					g->top = gv;
+			}
 		}
-		g->width -= g->start;
+		if (g->right - g->left && g->top - g->bottom) {
+			ngly++;
+			wsum += g->right - g->left;
+			hsum += g->top - g->bottom;
+		}
 		f->fg[gn] = g;
 	}
 	fclose(fp);
+	if (ngly) {
+		f->mwidth = wsum / ngly;
+		f->mheight = hsum / ngly;
+	}
 	f->next = fontlist;
 	return(fontlist = f);
 nonint:
@@ -103,4 +121,126 @@ fonterr:
 	error(USER, errmsg);
 memerr:
 	error(SYSTEM, "out of memory in fontglyph");
+}
+
+
+freefont(fname)			/* free a font (free all if fname==NULL) */
+char  *fname;
+{
+	FONT  head;
+	register FONT  *fl, *f;
+	register int  i;
+
+	head.next = fontlist;
+	fl = &head;
+	while ((f = fl->next) != NULL)
+		if (fname == NULL || !strcmp(fname, f->name)) {
+			fl->next = f->next;
+			for (i = 0; i < 256; i++)
+				if (f->fg[i] != NULL)
+					free((char *)f->fg[i]);
+			freestr(f->name);
+			free((char *)f);
+		} else
+			fl = f;
+	fontlist = head.next;
+}
+
+
+int
+uniftext(sp, tp, f)			/* uniformly space text line */
+register short	*sp;		/* returned character spacing */
+register char  *tp;		/* text line */
+register FONT  *f;		/* font */
+{
+	int  linelen;
+
+	linelen = *sp++ = 0;
+	while (*tp)
+		if (f->fg[*tp++&0xff] == NULL)
+			*sp++ = 0;
+		else
+			linelen += *sp++ = 256;
+	return(linelen);
+}
+
+
+int
+squeeztext(sp, tp, f, cis)		/* squeeze text line */
+short  *sp;			/* returned character spacing */
+char  *tp;			/* text line */
+FONT  *f;			/* font */
+int  cis;			/* intercharacter spacing */
+{
+	int  linelen;
+	register GLYPH	*gp;
+
+	gp = NULL;
+	while (*tp && (gp = f->fg[*tp++&0xff]) == NULL)
+		*sp++ = 0;
+	cis /= 2;
+	linelen = *sp = cis;
+	while (gp != NULL) {
+		if (gp->nverts) {		/* regular character */
+			linelen += *sp++ += cis - gp->left;
+			*sp = gp->right + cis;
+		} else {			/* space */
+			linelen += *sp++;
+			*sp = f->mwidth;
+		}
+		gp = NULL;
+		while (*tp && (gp = f->fg[*tp++&0xff]) == NULL) {
+			linelen += *sp++;
+			*sp = 0;
+		}
+	}
+	linelen += *sp += cis;
+	return(linelen);
+}
+
+
+int
+proptext(sp, tp, f, cis, nsi)		/* space line proportionally */
+short  *sp;			/* returned character spacing */
+char  *tp;			/* text line */
+FONT  *f;			/* font */
+int  cis;			/* target intercharacter spacing */
+int  nsi;			/* minimum number of spaces for indent */
+{
+	register char  *end, *tab;
+	GLYPH  *gp;
+	short  *nsp;
+	int  alen, len, width;
+					/* start by squeezing it */
+	squeeztext(sp, tp, f, cis);
+					/* now, realign spacing */
+	width = *sp++;
+	while (*tp) {
+		len = alen = 0;
+		nsp = sp;
+		for (end = tp; *end; end = tab) {
+			tab = end + 1;
+			alen += *nsp++;
+			if (f->fg[*end&0xff]) {
+				while ((gp = f->fg[*tab&0xff]) != NULL &&
+						gp->nverts == 0) { /* tab in */
+					alen += *nsp++;
+					tab++;
+				}
+				len += tab - end;
+			}
+			if (nsi && tab - end > nsi)
+				break;
+		}
+		len *= f->mwidth + cis;		/* compute target length */
+		width += len;
+		len -= alen;			/* necessary adjustment */
+		while (sp < nsp) {
+			alen = len/(nsp-sp);
+			*sp++ += alen;
+			len -= alen;
+		}
+		tp = tab;
+	}
+	return(width);
 }