Fixed 'missing glyph doesn't use fontconfig config substitutions' bug
XftFontMatch does display-specific font configuration (commitdev528241a). 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 commit4242027. [1]: https://cgit.freedesktop.org/xorg/lib/libXft/tree/src/xftfont.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; | ||||
|  |  | |||
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