st/patch/font2.c

int
xloadsparefont(FcPattern *pattern, int flags)
{
	FcPattern *match;
	FcResult result;

	#if USE_XFTFONTMATCH_PATCH
	match = XftFontMatch(xw.dpy, xw.scr, pattern, &result);
	#else
	match = FcFontMatch(NULL, pattern, &result);
	#endif // USE_XFTFONTMATCH_PATCH
	if (!match) {
		return 1;
	}

	if (!(frc[frclen].font = XftFontOpenPattern(xw.dpy, match))) {
		FcPatternDestroy(match);
		return 1;
	}

	frc[frclen].flags = flags;
	/* Believe U+0000 glyph will present in each default font */
	frc[frclen].unicodep = 0;
	frclen++;

	return 0;
}

void
xloadsparefonts(void)
{
	FcPattern *pattern;
	double fontval;
	int fc;
	char **fp;

	if (frclen != 0)
		die("can't embed spare fonts. cache isn't empty");

	/* Calculate count of spare fonts */
	fc = sizeof(font2) / sizeof(*font2);
	if (fc == 0)
		return;

	/* Allocate memory for cache entries. */
	if (frccap < 4 * fc) {
		frccap += 4 * fc - frccap;
		frc = xrealloc(frc, frccap * sizeof(Fontcache));
	}

	for (fp = font2; fp - font2 < fc; ++fp) {

		if (**fp == '-')
			pattern = XftXlfdParse(*fp, False, False);
		else
			pattern = FcNameParse((FcChar8 *)*fp);

		if (!pattern)
			die("can't open spare font %s\n", *fp);

		if (defaultfontsize > 0 && defaultfontsize != usedfontsize) {
			if (FcPatternGetDouble(pattern, FC_PIXEL_SIZE, 0, &fontval) ==
					FcResultMatch) {
				fontval *= usedfontsize / defaultfontsize;
				FcPatternDel(pattern, FC_PIXEL_SIZE);
				FcPatternDel(pattern, FC_SIZE);
				FcPatternAddDouble(pattern, FC_PIXEL_SIZE, fontval);
			} else if (FcPatternGetDouble(pattern, FC_SIZE, 0, &fontval) ==
					FcResultMatch) {
				fontval *= usedfontsize / defaultfontsize;
				FcPatternDel(pattern, FC_PIXEL_SIZE);
				FcPatternDel(pattern, FC_SIZE);
				FcPatternAddDouble(pattern, FC_SIZE, fontval);
			}
		}

		FcPatternAddBool(pattern, FC_SCALABLE, 1);

		#if !USE_XFTFONTMATCH_PATCH
		FcConfigSubstitute(NULL, pattern, FcMatchPattern);
		XftDefaultSubstitute(xw.dpy, xw.scr, pattern);
		#endif // USE_XFTFONTMATCH_PATCH

		if (xloadsparefont(pattern, FRC_NORMAL))
			die("can't open spare font %s\n", *fp);

		FcPatternDel(pattern, FC_SLANT);
		FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ITALIC);
		if (xloadsparefont(pattern, FRC_ITALIC))
			die("can't open spare font %s\n", *fp);

		FcPatternDel(pattern, FC_WEIGHT);
		FcPatternAddInteger(pattern, FC_WEIGHT, FC_WEIGHT_BOLD);
		if (xloadsparefont(pattern, FRC_ITALICBOLD))
			die("can't open spare font %s\n", *fp);

		FcPatternDel(pattern, FC_SLANT);
		FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ROMAN);
		if (xloadsparefont(pattern, FRC_BOLD))
			die("can't open spare font %s\n", *fp);

		FcPatternDestroy(pattern);
	}
}