// Copyright status: this file is in the public domain.

#include <strings.h>

#include "lx.h"

LX_CHARINFO lx_text_extents_8(const LX_FONTINFO *fi, const unsigned char *s, int sl)
{
 LX_CHARINFO rci;
 int x;
 int first;
 const LX_CHARINFO *ci;
 int w;
 int l;
 int r;

 if (sl == -1) sl = strlen(s);
 if (sl == 0) return((LX_CHARINFO){.lbearing=0,.rbearing=0,.width=0,.ascent=0,.descent=0,.attr=0});
 first = 1;
 w = 0;
 for (x=0;x<sl;x++)
  { ci = lx_fontinfo_charinfo(fi,s[x]);
    if (! ci) continue;
    if (ci->lbearing || ci->rbearing || ci->width || ci->ascent || ci->descent)
     { l = w + ci->lbearing;
       r = w + ci->rbearing;
       if ((x == 0) || (ci->ascent > rci.ascent)) rci.ascent = ci->ascent;
       if ((x == 0) || (ci->descent > rci.descent)) rci.descent = ci->descent;
       if ((x == 0) || (l < rci.lbearing)) rci.lbearing = l;
       if ((x == 0) || (r > rci.rbearing)) rci.rbearing = r;
       w += ci->width;
     }
  }
 rci.width = w;
 rci.attr = 0;
 return(rci);
}