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Re: SVG, Style, Resizing, Etc.

From: Jon Gunderson <jongund@ux1.cso.uiuc.edu>
Date: Fri, 06 Oct 2000 10:36:35 -0500
Message-Id: <4.3.1.2.20001006103150.02975060@staff.uiuc.edu>
To: Ian Jacobs <ij@w3.org>
Cc: Al Gilman <asgilman@iamdigex.net>, w3c-wai-ua@w3.org, kasday@ACM.org, Bruce_Bailey@ed.gov
Ian,
I am tending to agree with you the more I learn about the scalable vector 
graphics issue, this is probably to big an issue to try to squeeze in 
before going to last call.  We certainly would have trouble coming up with 
implementation experience for any new accessibility checkpoints related to 
SVG to bypass CR, especially if it there were any new priority 1 or 2 
checkpoints.

What do other people think?

Jon



At 10:44 AM 10/6/2000 -0400, Ian Jacobs wrote:
>Jon Gunderson wrote:
> >
> > Al,
> > The colors user for rendering the graphic is often more important than size
> > for some people with visual impairments.  It depends on what part of the
> > eye is affected.  So we need to include foreground and background color in
> > the mix for full consideration of accessibility for people with low vision.
>
>1) I could imagine a checkpoint (though I don't think we should add it
>at this point)
>    that the user be able to control all colors in a document, within the
>same range
>    available to the author. The current UAAG 1.0 only covers
>foreground/background
>    colors for text and not for graphical objects such as splines. Here's
>why I don't
>    think we should address this issue at this time: we have not had any
>discussions
>    at all about the usability or accessibility requirements of
>overriding colors for
>    portions of images or graphics. I don't think we should attack a new
>problem 10
>    days before going to last call. It can wait until another version.
>
>2) SVG colors can be specified with CSS style sheets and so allow user
>override of
>    author and user agent defaults.
>
>  - Ian
>
> > At 10:24 PM 10/5/2000 -0400, Al Gilman wrote:
> > >[Len, Bruce: the reference thread is at
> > > 
> http://lists.w3.org/Archives/Public/w3c-wai-ua/2000OctDec/thread.html#4 ]
> > >
> > >According to Bruce Bailey's report
> > >
> > >   http://lists.w3.org/Archives/Public/w3c-wai-ig/2000OctDec/0012.html
> > >
> > >if you can force the text up in size you have solved the P2 
> problem.  Icons
> > >don't seem to be the same severity of problem.
> > >
> > >This would sound as though, modulo a possible P3 gap, you are probably
> > >covered as is.
> > >
> > >I am copying Len and Bruce on this as I feel a bit over my depth.  I don't
> > >have that good a background in low vision.
> > >
> > >Al
> > >
> > >On second thought that bit about icons is not so strange.  Icons are 
> analog
> > >encoding.  This means you would expect them to degrade gradually on
> > >low-pass filtering where all you get is an outline, more or less.  Text
> > >doesn't look like it sounds.  You have to correctly identify the letters.
> > >Fuzz text and all the letters without ascenders or descenders look alike;
> > >that's an awful lot of them!  Symbolic codes have better error rejection
> > >for low error rates.  That's why digital and FM before it deliver high
> > >fidelity.  But like the little girl with the little curl; when they are
> > >bad... watch out!
> >
> > Jon Gunderson, Ph.D., ATP
> > Coordinator of Assistive Communication and Information Technology
> > Division of Rehabilitation - Education Services
> > MC-574
> > College of Applied Life Studies
> > University of Illinois at Urbana/Champaign
> > 1207 S. Oak Street, Champaign, IL  61820
> >
> > Voice: (217) 244-5870
> > Fax: (217) 333-0248
> >
> > E-mail: jongund@uiuc.edu
> >
> > WWW: http://www.staff.uiuc.edu/~jongund
> > WWW: http://www.w3.org/wai/ua
>
>--
>Ian Jacobs (jacobs@w3.org)   http://www.w3.org/People/Jacobs
>Tel:                         +1 831 457-2842
>Cell:                        +1 917 450-8783

Jon Gunderson, Ph.D., ATP
Coordinator of Assistive Communication and Information Technology
Division of Rehabilitation - Education Services
MC-574
College of Applied Life Studies
University of Illinois at Urbana/Champaign
1207 S. Oak Street, Champaign, IL  61820

Voice: (217) 244-5870
Fax: (217) 333-0248

E-mail: jongund@uiuc.edu

WWW: http://www.staff.uiuc.edu/~jongund
WWW: http://www.w3.org/wai/ua
Received on Friday, 6 October 2000 11:36:27 GMT

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