[Bug 891457] uneven emulated Bold/Slant for subsetted large fonts

bugzilla at redhat.com bugzilla at redhat.com
Sun Jan 13 08:27:45 UTC 2013


Product: Fedora
https://bugzilla.redhat.com/show_bug.cgi?id=891457

--- Comment #19 from Hin-Tak Leung <htl10 at users.sourceforge.net> ---
    (In reply to comment #14)
    >... This is run on Debian Testing 64-bit using cairo master. I get
    > the same output on Debian Testing 32-bit.

    plot thickens... so 64-bit cairo also suffers occasionally.

    > The CairoFont-?-? names are because the font was created using the
FreeType
    > outlines instead of subsetting the original font.

    Yes, I see from grep'ing through the code - it was the first difference I
noticed from the upgrade... related but somewhat a red-herring.

    (In reply to comment #15)
    >...
    > The PNG output is correct. The PDF and PS is not bold.

    R's X11 display is also somewhat cairo-based - and the display is correct;
I think it doesn't affect bitmap devices.

    (In reply to comment #16)
    ...
    > broken font

    One possibility crossed my mind is the font-writing part of cairo (and
bad-interaction with freetype emulated fonts). Hence I wrote to Werner (of
freetype) of both correctly embolden output & wrong ouput and asked if he could
tell how and in what way the glyph data is corrected. fontforge could work now
that we know the PS output is also broken, and a "reproducible" way of breaking
it...

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