Platforms provide their own image decoders. Some of them use the cross-platform image decoders checked into WebCore: http://trac.webkit.org/browser/trunk/WebCore/platform/image-decoders
A quick skim of mozilla's bug on the subject: https://bugzilla.mozilla.org/show_bug.cgi?id=500500 leads me to believe there is currently no patent-safe way to use JPEG-XR. The only platform which has JPEG-XR natively is Windows, however both Apple's Windows port and Chromium's windows port use the checked-in image decoders. I think WebKit is unlikely to support JPEG-XR any time soon. Without mozilla supporting it (or much content on the web using it) there is little reason to add support. -eric On Wed, Dec 22, 2010 at 4:28 PM, Alex Danilo <a...@legrope.com> wrote: > Hi All, > > Sorry to post a newbie question. > > My name's Alex Danilo, I've been doing some SVG stuff over the past > few years and now have spent the past few months looking into the SVG > implementation in WebKit. > > What I'm tyring to do is add a new image format in the engine > as an exercise. > > I am trying to add support for JPEG-XR (formerly HD-Photo) as > a new supported image format for the <image> element (and <img> in > HTML I guess too). > > Looking at the ports, code etc. this all plumbs via the Image > class, BitmapImage class, etc. > > For some ports, like CG I see that the decode is done lazily > and defers it to CG so that no intermediate bitmaps are generated. > > For JPEG-XR, I will have to unpack the ARGB32 bitmap somewhere > in memory and do a GraphicsContext drawImage() call to paint it to > the canvas. > > So my question is, is there any preferred or desirable method > to accomplish this? i.e. how should I structure the interface to the > Image class to make sure it works on all ports without creating > a dog's breakfast of it? > > All tips and pointers greatly appreciated. > > Cheers, > Alex > > > _______________________________________________ > webkit-dev mailing list > webkit-dev@lists.webkit.org > http://lists.webkit.org/mailman/listinfo.cgi/webkit-dev > _______________________________________________ webkit-dev mailing list webkit-dev@lists.webkit.org http://lists.webkit.org/mailman/listinfo.cgi/webkit-dev
