[svg-developers] Re: Stroke width inside the shape -- Bug in Opera 9.61 and IE/ASV ???

2008-12-23 Thread Frank Bruder
--- In svg-developers@yahoogroups.com, Helder Magalhães 
helder.magalh...@... wrote:

 Of course that, even in case it is an error, proper protection 
should
 exist in implementations (IMHO a crash is not acceptable 
behavior)...
 
This inspired this week's strip of my SVG powered photo webcomic:
http://frankbruder.fr.ohost.de/JustThinking/showThought.php?
number=23




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RE: [svg-developers] Re: Stroke width inside the shape -- Bug in Opera 9.61 and IE/ASV ???

2008-12-22 Thread Dailey, David P.
I saw Frank's suggestion and thought yes of course! How
straightforward.

 

So I thought I'd check it out to make sure it worked the way we'd
expect. Hmmm Bad news!

 

Look at http://srufaculty.sru.edu/david.dailey/halfstroke0.svg   (source
code included below).

 

Safari and Chrome seem to (sort of) do it correctly - though they differ
rather clearly in how they handle the anti-aliasing around the clipping
region. 

 

Firefox (3.0.4) displays nothing.

Opera 9.61 closes itself immediately after opening the file.

IE/ASV 3.03 at first displays nothing, and then closes itself if the
reload button is pushed.

 

Pretty amazing behavior, I would posit. I couldn't believe it this
weekend when I tried it at home serving it locally, so I thought I'd try
it viewing from a different machine at the office and coming from a
server, but, sigh, same results.

 

 

David

halfstroke0.svg

svg   xmlns=http://www.w3.org/2000/svg; width=100%

 
xmlns:xlink=http://www.w3.org/1999/xlink; 

defs

 clipPath id=cp_poly1

  use xlink:href=#poly1/

 /clipPath

/defs

path id=poly1 d=M 100 100 300 150 200 150 150 400 z
clip-path=url(#cp_poly1)

stroke=blue stroke-width=15px/

/svg

halfstroke0.svg

 

 

From: svg-developers@yahoogroups.com
[mailto:svg-develop...@yahoogroups.com] On Behalf Of Frank Bruder
Sent: Friday, December 12, 2008 10:33 PM
To: svg-developers@yahoogroups.com
Subject: [svg-developers] Re: Stroke width inside the shape

 

You could do this with a clip path.
Sample code snippet:

defs
clipPath id=cp_poly1
use xlink:href=#poly1/
/clipPath
/defs
polygon id=poly1 points=... clip-path=url(#cp_poly1)
stroke=blue stroke-width=5px/

The stroke is drawn centered around the outline, but the outer part is
clipped by using the same shape as a clip path.

--- In svg-developers@yahoogroups.com
mailto:svg-developers%40yahoogroups.com , jgfa92004
juliegaut...@...
wrote:

 Hi,
 Is there a way to set the stroke width of a polyline inside the shape 
 instead of half inside and half outside ?
 Thanks.
 Julie


 



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Re: [svg-developers] Re: Stroke width inside the shape -- Bug in Opera 9.61 and IE/ASV ???

2008-12-22 Thread ddailey
Hi Helder,

Somehow this posting (which I tried to post several days ago) only showed up 
this week -- curious. So now there are two threads on the same topic, sorry!

Yes, it does set up a circular reference. Robert Longson observed such last 
week.

It seemed like it might provide an easy solution to the problem of making a 
stroke appear only inside a shape, as Frank Bruder had observed, but clearly 
Opera and IE don't like the circular reference. It seems that all browsers 
react differently.

cheers
David
  - Original Message - 
  From: Helder Magalhães 
  To: svg-developers@yahoogroups.com 
  Sent: Monday, December 22, 2008 11:48 AM
  Subject: [svg-developers] Re: Stroke width inside the shape -- Bug in Opera 
9.61 and IE/ASV ???


   Opera 9.61 closes itself immediately after opening the file.
   
   IE/ASV 3.03 at first displays nothing, and then closes itself if the
   reload button is pushed.

  Cool, I guess you've found a crasher! ;-)

  By quickly looking at the code, it seems that it sets up a circular
  reference, which seems to be invalid (at least, in SVGMobile 1.2) [1].
  Or am I missing something?

  Of course that, even in case it is an error, proper protection should
  exist in implementations (IMHO a crash is not acceptable behavior)...

  Cheers,

  Helder

  [1] http://www.w3.org/TR/SVGMobile12/linking.html#circular-iri



   

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