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st: Fix off-by-one error when calculating character width.

LEN(str) is one larger than strlen(str) because it also counts the zero
terminator. The original code would include the .notdef glyph (since it'll
try to encode character 0, which gets encoded to the .notdef glyph) when
measuring the average dimensions of printable ascii characters.

This causes problems with fonts like GNU Unifont where the .notdef glyph is
not the same width as the usual half-width characters.

Signed-off-by: Christoph Lohmann <20h@r-36.net>
master
Tor Andersson 8 years ago
committed by Christoph Lohmann
parent
commit
39964614b7
1 changed files with 2 additions and 2 deletions
  1. +2
    -2
      st.c

+ 2
- 2
st.c View File

@ -3291,7 +3291,7 @@ xloadfont(Font *f, FcPattern *pattern)
XftTextExtentsUtf8(xw.dpy, f->match, XftTextExtentsUtf8(xw.dpy, f->match,
(const FcChar8 *) ascii_printable, (const FcChar8 *) ascii_printable,
LEN(ascii_printable), &extents);
strlen(ascii_printable), &extents);
f->set = NULL; f->set = NULL;
f->pattern = FcPatternDuplicate(pattern); f->pattern = FcPatternDuplicate(pattern);
@ -3302,7 +3302,7 @@ xloadfont(Font *f, FcPattern *pattern)
f->rbearing = f->match->max_advance_width; f->rbearing = f->match->max_advance_width;
f->height = f->ascent + f->descent; f->height = f->ascent + f->descent;
f->width = DIVCEIL(extents.xOff, LEN(ascii_printable));
f->width = DIVCEIL(extents.xOff, strlen(ascii_printable));
return 0; return 0;
} }


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