Measure the single advance width with a heuristic method - st - Personal fork of st
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---
(DIR) commit 034a5c8a09e23ce0a410d0c608dd7e050b83681e
(DIR) parent 30440295bc054f37a2a8275acca769cd83bcb780
(HTM) Author: Ryusei Yamaguchi <mandel59@gmail.com>
Date: Tue, 8 Mar 2016 12:26:04 +0900
Measure the single advance width with a heuristic method
This fix is needed to use dual-width fonts, which have double-width
glyphs (e.g. CJK unified ideographs).
Signed-off-by: Ryusei Yamaguchi <mandel59@gmail.com>
Signed-off-by: Christoph Lohmann <20h@r-36.net>
Diffstat:
M config.def.h | 8 ++++++++
M st.c | 8 +++++++-
2 files changed, 15 insertions(+), 1 deletion(-)
---
(DIR) diff --git a/config.def.h b/config.def.h
@@ -417,3 +417,11 @@ static uint selmasks[] = {
[SEL_RECTANGULAR] = Mod1Mask,
};
+/*
+ * Printable characters in ASCII, used to estimate the advance width
+ * of single wide characters.
+ */
+static char ascii_printable[] =
+ " !\"#$%&'()*+,-./0123456789:;<=>?"
+ "@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\\]^_"
+ "`abcdefghijklmnopqrstuvwxyz{|}~";
(DIR) diff --git a/st.c b/st.c
@@ -68,6 +68,7 @@ char *argv0;
#define LEN(a) (sizeof(a) / sizeof(a)[0])
#define DEFAULT(a, b) (a) = (a) ? (a) : (b)
#define BETWEEN(x, a, b) ((a) <= (x) && (x) <= (b))
+#define DIVCEIL(n, d) (((n) + ((d) - 1)) / (d))
#define ISCONTROLC0(c) (BETWEEN(c, 0, 0x1f) || (c) == '\177')
#define ISCONTROLC1(c) (BETWEEN(c, 0x80, 0x9f))
#define ISCONTROL(c) (ISCONTROLC0(c) || ISCONTROLC1(c))
@@ -3277,6 +3278,7 @@ xloadfont(Font *f, FcPattern *pattern)
{
FcPattern *match;
FcResult result;
+ XGlyphInfo extents;
match = FcFontMatch(NULL, pattern, &result);
if (!match)
@@ -3287,6 +3289,10 @@ xloadfont(Font *f, FcPattern *pattern)
return 1;
}
+ XftTextExtentsUtf8(xw.dpy, f->match,
+ (const FcChar8 *) ascii_printable,
+ LEN(ascii_printable), &extents);
+
f->set = NULL;
f->pattern = FcPatternDuplicate(pattern);
@@ -3296,7 +3302,7 @@ xloadfont(Font *f, FcPattern *pattern)
f->rbearing = f->match->max_advance_width;
f->height = f->ascent + f->descent;
- f->width = f->lbearing + f->rbearing;
+ f->width = DIVCEIL(extents.xOff, LEN(ascii_printable));
return 0;
}