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Re: SVG: (SVG 1.1) arcs sensible to zoom level

From: Helder Magalh„es <helder.magalhaes@gmail.com>
Date: Wed, 13 Feb 2008 14:20:29 +0000
Message-ID: <2a1ddf8a0802130620m4ea27168u652f421b943f4059@mail.gmail.com>
To: www-amaya@w3.org
Additionally, this issue also seems to be causing a freeze when
zooming in. This was found while trying to isolate another issue for

Release number:
amaya 10 (Feb 12 2008)

Windows XP SP2

Description of the bug:
A freeze (with high CPU usage) occurs when the document is zoomed in
several times. The number of zoom operations needed to freeze the
application varies with the arc used (different arcs freeze the
application in different zoom levels).

Example to reproduce the bug:
1. Open attachment "arcs-zoom-in.svg";
2. Zoom the document in seven times (using Ctrl+"+", for example).

Additional notes:
The previous attachment ("arcs-control-vectors.svg") only freezes at
the eighth zoom in operation: this suggests a possible overflow which
is dependent on the arcs' control vectors.

Best regards,

  Helder Magalh„es

On Feb 6, 2008 11:48 AM, Helder Magalh„es <helder.magalhaes@gmail.com> wrote:
> This is the first of a series of SVG-related bug reports, made in the
> scope of the version 10 pre-release announcement. I've decided to
> create a new thread for each bug which, although somehow cluttering,
> will help isolating the discussion for each separate issue. All issues
> were previously checked in known open bugs list [1], wish list [2] and
> searched in the mailing list [3] prior to submission.
> Release number:
> amaya 10 (Feb 1 2008)
> Platform:
> Windows XP SP2
> Description of the bug:
> (SVG 1.1) arcs are affected by zoom level. By observing the behavior
> it's suggested that the control vectors are the portion which seem to
> be affected.
> This may deceive the user as the arc may assume another appearance
> (straight line when the document is zoomed out, for example) and a
> causes weird visual effects. Begin and end coordinates seem OK.
> Example to reproduce the bug:
> 1. Open attachment "arcs-control-vectors.svg";
> 2. Zoom the document in/out (using Ctrl+mouse wheel scroll, for example).
> Scenario where the bug occurs:
> Although the issue was isolated in the file attached, it seems to
> occur whenever (SVG 1.1) arcs are used.
> Additional notes:
> This is related to the (somehow too generic) bug SVG005. The bug
> report contains an URL [4] where the clouds in "Weather" button also
> suffer from the issue.
> Best regards,
>   Helder Magalh„es
> [1] http://dev.w3.org/cvsweb/~checkout~/Amaya/doc/Amaya_open_bugs.html?content-type=text/html&only_with_tag=HEAD
> [2] http://dev.w3.org/cvsweb/~checkout~/Amaya/doc/Amaya_wish_list.html?content-type=text/html&only_with_tag=HEAD
> [3] http://lists.w3.org/Archives/Public/www-amaya/
> [4] http://www.peepo.co.uk/peepo2/index.html

(image/svg+xml attachment: arcs-zoom-in.svg)

Received on Wednesday, 13 February 2008 14:20:39 UTC

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