[Bug 856239] fuzzy font rendering (Liberation 2 regression)

bugzilla at redhat.com bugzilla at redhat.com
Mon Dec 3 16:06:51 UTC 2012

Product: Fedora

--- Comment #122 from Mike FABIAN <mfabian at redhat.com> ---
(In reply to comment #120)
> (In reply to comment #119)
> > 
> > I cannot see much differences between the different settings for
> > liberation sans.
> Due to hintlight it does not use bytecode to its full strength and use
> subpixel rendering. I think that is the reason when we use above setting
> http://pravins.fedorapeople.org/liberation/arial-sans2-sans1-arimo-testing2-
> fedora18-subpixel-rendering.png  All renders bit similar to each other.
> Since the outline is same in fonts for all fonts (not tested Arail though)

Yes, here all 3 fonts (Arial, Liberation Sans 1, Liberation Sans 2)
look very similar because the byte code hinting is not used.

All very fuzzy.

> > No matter which settings are used, it never renders as sharp
> > as liberation 1.07 with autohint=false and hintstyle=hintfull.
> Agree with this, below is image for it. Just compare it with above.
> http://pravins.fedorapeople.org/liberation/arial-sans2-sans1-arimo-testing2-
> fedora18.png

And here Arial and Liberation Sans 1 are very sharp, because the
byte code is used and these have high quality byte code.

Liberation Sans 2 sticks out here as much bolder and fuzzier because
it does not have such high quality byte code.

The results for using the byte code of Liberation Sans 2 are similar to
using the autohinter which makes it likely that some automatic tool
was used to generate the byte code for Liberation Sans 2 and that
tool achieves similar results as the autohinter of freetype.

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