W3C home > Mailing lists > Public > www-svg@w3.org > December 2010

Re: Scaling sub-pixel fonts

From: Helder Magalh„es <helder.magalhaes@gmail.com>
Date: Mon, 6 Dec 2010 10:47:19 +0000
Message-ID: <AANLkTikP+of2-j6i-78OTO_JHq3WYV_Y7XsSLc+COwVL@mail.gmail.com>
To: Jeff Schiller <codedread@gmail.com>
Cc: www-svg <www-svg@w3.org>
Hi everyone,

> http://codedread.com/browser-tests/subpixel.svg
> Just want to confirm that there should be two tiny words on this page.
> 1) Firefox 3.6 and IE9 display both words the same sizes as expected

It should be noticed that, in Firefox 4, there are noticeable changes
in font rendering, at least in Windows, due to the introduction of
Direct2D [1] (GPU accelerated widget and font rendering - via
DirectWrite). (Using a beta or a nightly build, one can check/toggle
this feature in "Options" --> "Advanced" --> General --> "Use hardware
acceleration when available", current status can be confirmed by
typing "about:support" in the address bar.) I've seen a couple font
rendering bugs being "solved" by this new approach (for example, bug
543176 [2]), so one should be aware of these changes in the mean time
(and, even afterward, when no hardware support is available/configured
enabled). :-)

On the other hand, I've quickly confirmed that, in *this* particular
case, rendering seems accurate in both versions (3.6.x and a nightly
4.0). ;-)

> Thanks,
> Jeff Schiller


[1] https://bugzilla.mozilla.org/show_bug.cgi?id=direct2d
[2] https://bugzilla.mozilla.org/show_bug.cgi?id=543176
Received on Monday, 6 December 2010 10:48:08 UTC

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