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Fixed 'missing glyph doesn't use fontconfig config substitutions' bug

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XftFontMatch does display-specific font configuration (commit 528241a).
Nice. Unfortunately, when we switched from FcFontMatch, we also stopped
storing the post-Fc{Config,Default}Substitute FcPattern for future
lookups. The result is that if a glyph isn't found in the primary font,
secondary font lookups use the original FcPattern, not the configured
one. If you have custom fontconfig rules (like me), this can be
disappointing.

I basically just copied the guts out of XftFontMatch[1] and saved
the intermediate configured FcPattern. Could be related to the bug that
inspired commit 4242027.

[1]: https://cgit.freedesktop.org/xorg/lib/libXft/tree/src/xftfont.c
This commit is contained in:
Spencer Phippen 2016-11-23 19:17:59 +01:00 committed by Roberto E. Vargas Caballero
parent 740ada1447
commit fa9a459972
1 changed files with 19 additions and 3 deletions
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22
st.c
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@ -3373,16 +3373,32 @@ xgeommasktogravity(int mask)
int
xloadfont(Font *f, FcPattern *pattern)
{
FcPattern *configured;
FcPattern *match;
FcResult result;
XGlyphInfo extents;
int wantattr, haveattr;
match = XftFontMatch(xw.dpy, xw.scr, pattern, &result);
if (!match)
/*
* Manually configure instead of calling XftMatchFont
* so that we can use the configured pattern for
* "missing glyph" lookups.
*/
configured = FcPatternDuplicate(pattern);
if (!configured)
return 1;
FcConfigSubstitute(NULL, configured, FcMatchPattern);
XftDefaultSubstitute(xw.dpy, xw.scr, configured);
match = FcFontMatch(NULL, configured, &result);
if (!match) {
FcPatternDestroy(configured);
return 1;
}
if (!(f->match = XftFontOpenPattern(xw.dpy, match))) {
FcPatternDestroy(configured);
FcPatternDestroy(match);
return 1;
}
@ -3414,7 +3430,7 @@ xloadfont(Font *f, FcPattern *pattern)
strlen(ascii_printable), &extents);
f->set = NULL;
f->pattern = FcPatternDuplicate(pattern);
f->pattern = configured;
f->ascent = f->match->ascent;
f->descent = f->match->descent;