- From: Tab Atkins Jr. <jackalmage@gmail.com>
- Date: Wed, 23 Jun 2010 08:17:40 -0700
- To: robert@ocallahan.org
- 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 Tue, Jun 22, 2010 at 9:28 PM, Robert O'Callahan <robert@ocallahan.org> wrote: > 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. Oh, jeez. I was looking at webkit's rendering twice, rather than looking at webkit and then firefox. I feel silly. You're correct - for a 100px blur, the shadow extends outward 79px. That still doesn't explain Simon's statement that the blur extends outward by the full blur length. I continue to measure a nearly perfect half-blur-length of shadow extending from the main shadow body in Chrome, whether the blur is 8px or 100px. ~TJ
Received on Wednesday, 23 June 2010 15:18:32 UTC