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greg |
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/* 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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} |
