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Re: [css3-background] vastly different takes on "blur"

From: Brad Kemper <brad.kemper@gmail.com>
Date: Tue, 22 Jun 2010 16:06:12 -0700
Message-Id: <C1F3FC67-D4DD-41ED-A5EE-16BC1937416C@gmail.com>
To: fantasai <fantasai.lists@inkedblade.net>
Cc: Brian Manthos <brianman@microsoft.com>, Simon Fraser <smfr@me.com>, "Tab Atkins Jr." <jackalmage@gmail.com>, "robert@ocallahan.org" <robert@ocallahan.org>, "www-style@w3.org" <www-style@w3.org>

On Jun 22, 2010, at 2:02 PM, fantasai <fantasai.lists@inkedblade.net>  

> At least we're clear on what the two options are. If this is the
> only complaint about the current definition, then I think we've
> made a lot of progress on this feature!

Actually, at the risk of being even more hated, I think we should also  
consider the following, some of which is based on me thinking further  
about Brian's paint bucket experiment:

• should pixels that are >99% opacity or <1% opacity be considered as  
part of the transition area which is to fit within the defined space  
(if specified shadow color is 100%)? (my thought is "no", or else pick  
some smaaler threshold like >99.5% or <0.5%)

• if you don't like that, we should at least ask the question of  
whether or not full specified opacity or totally transparent can be  
considered to be part of the transition, or if they both (or either)  
live completely outside it. I don't think we are currently clear about  

• should we say that all pixels of the blur that are <50% opacity  
(multiplied by specified color opacity) should exist outside the  
preblurred shape, and >50% within? I think implementations already do  
this, but I'm not sure how compatible it is with the other points,  

> As for whether the blur
> value should match definition A or definition B, we've got two
> options:
>  1. Push the issue to the CSSWG and get a decision there
>  2. Have Brad draw up some diagrams showing both interpretations
>     for an offset shadow and a glow and post the question to
>     css3.info / w3.org/bog/CSS / twitter as a survey.

I'm willing. 
Received on Tuesday, 22 June 2010 23:07:00 UTC

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