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Re: [CSS21] Test Suite

From: Chris Lilley <chris@w3.org>
Date: Sat, 24 Jul 2004 19:41:54 +0200
Message-ID: <1988818905.20040724194154@w3.org>
To: David Woolley <david@djwhome.demon.co.uk>
Cc: www-style@w3.org

On Saturday, July 24, 2004, 12:56:56 PM, David wrote:

>> With IE/Win having over 90% of the market share at the moment, it /must/
>> be "the dominant browser", yet it implements GIF transparency on which
>> many users depend; could you clarify exactly what you mean here, David ?

DW> GIF has a special case of transparency, a binary alpha channel.  PNG
DW> has a proper, analogue, alpha channel, but authors cannot use this when
DW> they want transparency because IE doesn't support alpha channels in PNG
DW> images.

Well it does, but poorly - the alpha channel is decoded and understood,
but he image is composited ontoa grey background instead of the actual

I have also seen older browsers composite onto solid black, or onto the
background color in the actual image.

DW>  That means that PNG will not, in real life, fill one of the
DW> main roles for GIF in web pages.

In Win/IE. It works just fine in Mac/IE, Firefox, Safari, Opera and

Its getting that the only thing holding content creators back is Win/IE,
pretty much everything else has moved past it in functionality.

 Chris Lilley                    mailto:chris@w3.org
 Chair, W3C SVG Working Group
 Member, W3C Technical Architecture Group
Received on Saturday, 24 July 2004 13:41:53 UTC

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