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

From: Robert O'Callahan <robert@ocallahan.org>
Date: Wed, 23 Jun 2010 16:28:32 +1200
Message-ID: <AANLkTinnHEOXFDpw8aXrQDEQ6tmGtLTN2uBwn2Zse5kg@mail.gmail.com>
To: "Tab Atkins Jr." <jackalmage@gmail.com>
Cc: Simon Fraser <smfr@me.com>, Brad Kemper <brad.kemper@gmail.com>, fantasai <fantasai.lists@inkedblade.net>, Brian Manthos <brianman@microsoft.com>, "www-style@w3.org" <www-style@w3.org>
On Wed, Jun 23, 2010 at 3:08 PM, Tab Atkins Jr. <jackalmage@gmail.com>wrote:

> Interesting.  I'm really not seeing that.  Check out this test case, frex:
>
> <!DOCTYPE html>
> <body style="font-size: 1000px; text-shadow: 0 0 100px black; color:
> white; font-family: Arial, sans-serif;">
> f
> <div style="background: red; width: 100px; height: 3px; position:
> absolute; top: 700px; left: 183px;"></div>
>
> (You may have to adjust the "left" on the <div>.)
>
> It seems very clear from a visual inspection that the blur only
> extends outward roughly 50px.  This effect occurs on both my Windows
> and Linux machines.
>

With that testcase, there's a 79 pixel-wide shadow of
not-completely-transparent pixels on both my Mac and Linux trunk builds.
Certainly some of those pixels are not apparent to the naked eye :-) ... a
screen magnifier that displays the actual color values of selected pixels is
useful.

Rob
-- 
"He was pierced for our transgressions, he was crushed for our iniquities;
the punishment that brought us peace was upon him, and by his wounds we are
healed. We all, like sheep, have gone astray, each of us has turned to his
own way; and the LORD has laid on him the iniquity of us all." [Isaiah
53:5-6]
Received on Wednesday, 23 June 2010 04:29:00 GMT

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