W3C home > Mailing lists > Public > www-style@w3.org > April 2005

Re: Anti-aliasing border corners [spin-off of Style confirmation descriptors]

From: Emrah BASKAYA <emrahbaskaya@hesido.com>
Date: Mon, 11 Apr 2005 13:13:26 +0300
To: "www-style@w3.org" <www-style@w3.org>
Message-ID: <opso2b0olk8nstxa@lomarnona>

On Sun, 10 Apr 2005 23:19:27 -0400, Barry <wassercrats@hotmail.com> wrote:

> Emrah BASKAYA wrote:
>> A straight vertical or horizontal line canNOT produce extra pixels if  
>> they
>> are not positioned with a sub-pixel accurate method or given sub-pixel
>> accurate widths. The 'aggressiveness' of anti-aliasing is a non-issue.
> Maybe Windows font-smoothing thickened the straight part of the letter
> because it cares more about smoothness than proper shape, or maybe there
> really should be a curve there. I don't know what anti-aliasing could do,
> but it would be nice to be able to adjust the softness or blur of  
> borders.

Fonts we use are now mainly vector-based and hence the data they contain  
is sub-pixel accurate so it is normal that their top border may be  
anti-aliased. Whether this creates an extra pixel with AA vs the one  
without AA is the matter of the AA implementation and host. The host may  
choose to ignore that extra pixel for layout but still display it for  

But I agree blurring is something else that can take many parameters but  
than again, I'd use images for blurred drop shadows with border-images as  
blurring is relatively more close to complex image-processing which many  
user-agents would simply not care to implement.

Received on Monday, 11 April 2005 10:13:29 UTC

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