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greg |
2.1 |
/* Copyright (c) 1992 Regents of the University of California */
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#ifndef lint
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static char SCCSid[] = "$SunId$ LBL";
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#endif
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/*
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* Polygonal font handling routines
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*/
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#include "standard.h"
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#include "font.h"
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#define galloc(nv) (GLYPH *)malloc(sizeof(GLYPH)+2*sizeof(GORD)*(nv))
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extern char *libpath; /* list of library directories */
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static FONT *fontlist = NULL; /* list of loaded fonts */
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FONT *
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getfont(fname) /* return font fname */
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char *fname;
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{
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char buf[16];
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FILE *fp;
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char *pathname, *err;
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int gn, ngv;
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register int gv;
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register GLYPH *g;
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GORD *gp;
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register FONT *f;
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for (f = fontlist; f != NULL; f = f->next)
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if (!strcmp(f->name, fname))
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return(f);
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/* load the font file */
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if ((pathname = getpath(fname, libpath, R_OK)) == NULL) {
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sprintf(errmsg, "cannot find font file \"%s\"", fname);
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error(USER, errmsg);
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}
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f = (FONT *)calloc(1, sizeof(FONT));
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if (f == NULL)
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goto memerr;
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f->name = savestr(fname);
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if ((fp = fopen(pathname, "r")) == NULL) {
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sprintf(errmsg, "cannot open font file \"%s\"",
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pathname);
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error(SYSTEM, errmsg);
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}
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while (fgetword(buf,sizeof(buf),fp) != NULL) { /* get each glyph */
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if (!isint(buf))
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goto nonint;
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gn = atoi(buf);
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if (gn < 0 || gn > 255) {
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err = "illegal";
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goto fonterr;
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}
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if (f->fg[gn] != NULL) {
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err = "duplicate";
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goto fonterr;
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}
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if (fgetword(buf,sizeof(buf),fp) == NULL || !isint(buf) ||
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(ngv = atoi(buf)) < 0 || ngv > 32000) {
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err = "bad # vertices for";
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goto fonterr;
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}
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g = galloc(ngv);
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if (g == NULL)
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goto memerr;
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g->nverts = ngv;
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g->start = g->width = 128;
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ngv *= 2;
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gp = gvlist(g);
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while (ngv--) {
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if (fgetword(buf,sizeof(buf),fp) == NULL ||
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!isint(buf) ||
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(gv = atoi(buf)) < 0 || gv > 255) {
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err = "bad vertex for";
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goto fonterr;
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}
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*gp++ = gv;
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if (ngv & 1) /* follow x limits */
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if (gv < g->start)
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g->start = gv;
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else if (gv > g->width)
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g->width = gv;
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}
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g->width -= g->start;
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f->fg[gn] = g;
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}
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fclose(fp);
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f->next = fontlist;
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return(fontlist = f);
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nonint:
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sprintf(errmsg, "non-integer in font file \"%s\"", pathname);
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error(USER, errmsg);
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fonterr:
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sprintf(errmsg, "%s character (%d) in font file \"%s\"",
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err, gn, pathname);
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error(USER, errmsg);
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memerr:
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error(SYSTEM, "out of memory in fontglyph");
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}
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