- From: Jeff Sonstein <jxsast@rit.edu>
- Date: Tue, 3 Nov 2009 06:45:51 -0400
- To: Jo Rabin <jrabin@mtld.mobi>
- Cc: Public BPWG <public-bpwg@w3.org>
On Nov 3, 2009, at 6:12 AM, Jo Rabin wrote: > 5. AOB > > Review of and tidy up of ISSUEs and ACTIONs - we have no open ISSUEs > and we have a handful of open actions on DKA, JeffS and Adam (hint > hint). RE: ACTION-885 I thought we had finished w this & closed it... last I remember the text now in the document (courtesy the hacking-and-slashing ummm I mean "fine editing" of Adam <grin/>) was something everyone could at least "live with" while I would *like* to be providing more detailed guidance to developers nonetheless I can *live with* just saying what is in the document at this point: ----- snip ----- 3.5.10.1 What it means Canvas and SVG provide alternative options for incorporating graphics in a Web application. Support for these technologies varies across devices so in many cases the choice of which technology to use will depend on the target devices for a given application. The Canvas element defines a drawable bitmap region onto which JavaScript can be used to render simple graphic primatives. In contrast, SVG is an XML language for defining vector graphics -- the nodes and elements are added to a DOM and can be modified later using JavaScript. SVG is well-suited for graphics that must be scalable and whose components need to be modified (e.g. panning and zooming a map) whereas Canvas is best suited for cases where a static bitmap is sufficient (e.g. drawing a scatter-chart, visual effects, reflections etc). In most cases Canvas is faster and should be preferred if it meets requirements. However, since Canvas generates a flat bitmap it is not inherently accessible and so should not be used as the sole means of conveying information. ----- snip ----- my only teenie quibble would be with the last sentence which I think might better be changed from: "it is not inherently accessible and so" to instead read: "it is inherently not accessible as it is not part of the DOM, and so" can we close this out at this mtg? jeffs -- "Workers were called, and human beings came." - Max Frisch - ============ Prof. Jeff Sonstein http://www.it.rit.edu/~jxs/ http://ariadne.iz.net/~jeffs/ http://chw.rit.edu/blog/ http://ariadne.iz.net/~jeffs/jeffs.asc http://www.it.rit.edu/~jxs/emailDisclaimer.html
Received on Tuesday, 3 November 2009 10:46:29 UTC