- From: Erik Dahlstrom <ed@opera.com>
- Date: Mon, 20 Sep 2010 14:34:50 +0200
- To: www-svg@w3.org
Opera supports GIF on all platforms (including Opera mobile and Opera mini). Full list of raster graphics formats that are supported (from http://www.opera.com/docs/specs/presto26/#graphics): - GIF - JPEG - BMP - ICO - WBMP - PNG - APNG (from Presto 2.1) Cheers /Erik On Mon, 20 Sep 2010 02:01:43 +0200, Alex Danilo <alex@abbra.com> wrote: > Most mobile browsers won't. > > This is to minimize memory footprint more than a technical > issue. > > But GIF isn't continuous tone - it's a palleted colour > format so is pretty lame. > > JPEG was the real game changer for browsers that made > the web really take off. Try doing flesh tones in GIF;-) > > The spec. sets the minimum requirements. At the time the > spec reached recommendation, GIF was encumbered and a > poor image format anyway, so wouldn't have been included > for those reasons. There are clear rules about use of IP > encumbered things in W3C specs, hence why there is no > video codec mandated either... > > Alex > > --Original Message--: >> All five of the major released browsers (ASV, FF, Opera, Chrome and >> Safari) support GIF in SVG. I don't know about IE9 or mobile platforms. >> D >> >> ----- Original Message ----- >> From: Jeff Schiller >> To: anthony.grasso@cisra.canon.com.au >> Cc: David Woolley ; ddailey ; www-svg@w3.org >> Sent: Sunday, September 19, 2010 7:18 PM >> Subject: Re: Some comments on <image> >> >> Out of curiosity - is there any browser that doesn't actually support >> GIF files in svg:image ? I'd be surprised... >> >> Jeff >> >> On Sun, Sep 19, 2010 at 4:10 PM, Anthony Grasso >> <anthony.grasso@cisra.canon.com.au> wrote: >> >> >> >> On 20/09/2010 4:22 AM, David Woolley wrote: >> >> ddailey wrote: >> >> >> 1. The spec says "Conforming SVG viewers need to support at least PNG, >> JPEG >> and SVG format files." Why not GIF? I recall a profound nervousness >> >> I think the basic reason is that PNG can exactly represent any image >> that GIF >> can represent, except for animations, and usually does so more >> compactly for >> equal quality, but also has the option of better quality. >> >> >> In saying that, there is nothing stopping an SVG viewer/editor (to my >> knowledge) from supporting GIF in addition to JPEG and PNG. :) >> >> >> >> >> that spread like squid ink through the open source community [1] 10 or >> 12 >> years ago as the holders of the GIF patent threatened to go after those >> who >> used it without license. I believe, however, that the patent has since >> expired. [2] A search of gif in Google images shows about a billion >> files with >> close to half that number for PNG. In many cases GIF >> >> Image formats are often chosen without any real understanding. There >> are an >> awful lot JPEG images (or PDF images using DCT) that are totally >> unsuitable for >> JPEG, either because people believe it produces the best compression for >> everything (and only make one dimensional decisions), or because they >> don't know >> PNG and paintbrush produces very poor GIFs. >> >> >> files are smaller than PNG files, I think, and lots of the older public >> >> Although it is possible, and may be more common for very small images, >> the >> compression scheme used in PNG is generally better than that used in >> GIF (the >> LZW used in GIF, and the actual subject of the patent, is designed as a >> compromise between compression speed and and compression ratio - it was >> really >> intended for real time compression of streamed data. That in PNG is >> designed to >> give good compression, at the expense of slow compression speeds. >> >> Apart from the possibility that PNG may have a higher overhead, the >> other reason >> that you may observe this is that PNG has more possible formats, and, >> for >> example, paintbrush uses 24 bit unpalletised for PNG and uses a >> non-optimised >> palette for GIF. >> >> >> domain imagery sites on the web used gif because, well, PNG wasn't >> available >> then. All the browsers I know of go ahead and support GIF anyhow, but >> it is >> one thing we can be certain of that no longer has patent entanglements. >> PNG?? >> Who can ever be completely sure until the 20 years pass? >> >> >> It's very likely that any such patent would also affect GIF. >> >> >> >> >> >> > > -- Erik Dahlstrom, Core Technology Developer, Opera Software Co-Chair, W3C SVG Working Group Personal blog: http://my.opera.com/macdev_ed
Received on Monday, 20 September 2010 12:35:29 UTC