Visited http://aiohttp.readthedocs.org/en/stable/client.html using Firefox 44.0a2. The "Goudy Old Style" font, sourced from Windows 7, is available. The italic variant of Goudy Old Style is chosen for the text. The regular variant should have been chosen. Disabling `gfx.font_rendering.fontconfig.fontlist.enabled` restores the expected behavior. Goudy Old Style v1.51 md5sums: 856dd110b08628f38f8fcfafe6fab19c GOUDOSB.TTF 832e3cfb4368f895ac5805cb9fff7898 GOUDOSI.TTF 78d7bdc55148aaa3307a1e8ad735c40f GOUDOS.TTF
(In reply to Jan Steffens from comment #0) > Visited http://aiohttp.readthedocs.org/en/stable/client.html using Firefox > 44.0a2. > > The "Goudy Old Style" font, sourced from Windows 7, is available. FWIW, I don't see a "Goudy Old Style" in the list at https://www.microsoft.com/typography/Fonts/product.aspx?PID=161. I suspect it may have come from some other package.
Right; it must have come from MS Office: https://www.microsoft.com/typography/fonts/font.aspx?FMID=981
Is this a recent regression?
It must be fairly recent, as the new Linux font-list code initially landed for mozilla-41, I believe (bug 1056479, mozilla-41; there have also been a number of followups, some of which may have affected this). Note that comment 0 indicates that the old code (i.e. with the new font-list preffed off) doesn't have this problem.
Summary: Mistakenly chooses italic font variant → Italic font used for regular text with Goudy Old Style under Linux
I've reproduced the problem using versions of these fonts from an old Windows XP install. The problem here is that the Goudy Old Style family from Windows XP has some odd width values in the OS/2 table : GOUDOS.ttx: <usWidthClass value="6"/> GOUDOSB.ttx: <usWidthClass value="6"/> GOUDOSI.ttx: <usWidthClass value="5"/> This implies that the regular and bold faces have a semi-expanded width while the italic face has a normal width. By the style matching rules defined in CSS3 Fonts, matching the italic face is correct for plain text because matching font-stretch: normal takes precedence over matching font-style: normal.  https://www.microsoft.com/typography/otspec/os2.htm#wdc The older font matching code was deferring to fontconfig which implements it's own set of priorities for font matching.
Created attachment 8698297 [details] fontconfig to fix up widths Here's a fontconfig file that fixes the reported width. Force-regenerating the caches (fc-cache -f) will be needed to fix existing fonts.
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