- From: ACJ <ego@acjs.net>
- Date: Sun, 25 Jul 2004 02:22:20 +0200
- To: David Woolley <david@djwhome.demon.co.uk>
- Cc: www-style@w3.org
David Woolley 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 ? >> >> > >GIF has a special case of transparency, a binary alpha channel. PNG >has a proper, analogue, alpha channel, but authors cannot use this when >they want transparency because IE doesn't support alpha channels in PNG >images. That means that PNG will not, in real life, fill one of the >main roles for GIF in web pages. > > > > Actually, when you set a PNG to 'Indexed Color' mode (something which GIF always is), IE *does* support PNG transparancy, but binary (like GIF). I've even seen examples[1] of PNG files that showed the analogue transparacy levels in browsers that support it, and only the binary (like GIF) one in IE (without offering different files!). I haven't managed to accomplish this myself yet, but I think that's because of limitations of the software I use to make my PNG files (PhotoShop CS). LatinByrd seems to be able to do the trick. The point is, transparancy is *not* an arguement that scores points for GIF. -ACJ [1] http://www.libpng.org/pub/png/pngs-img.html
Received on Saturday, 24 July 2004 20:21:48 UTC