- From: Dr. Olaf Hoffmann <Dr.O.Hoffmann@gmx.de>
- Date: Sat, 11 Oct 2008 19:18:16 +0200
- To: www-svg@w3.org
Anthony Grasso: > Hi Dr. Hoffmann, > Hello ;o) > Excellent find in the specification! It is old and I already noted this previously a longer time ago, but there was not much interest to care about it or to test it. At least I have related tests about this issue in my own test suite for more than two years ;o) Note, that Opera 9.5 manages both critical situations with determinant 0 and indefinite (due to a possible skew transformation of for example 90 degree) and has only minor problems in relation with vector-effect non-scaling-stroke (instead of a constrained transformation). I think, this indicates already, that Opera uses another (more clever?) method to get the effect of the constrained transformation anyway, obviously without using the inverse matrix and avoiding the problem. On the other hand, the problems of Opera with vector-effect non-scaling-stroke indicates that it maybe could be even more clever - especially because for non-scaling-stroke an inversion is not even mentioned ;o) > The SVG Working Group discussed this > issue and we concluded that we should add wording that warns authors of the > problem. > > As a result I was given ACTION-2284 [1] to add the wording to the > specification. The new wording can be found in "The TransformRef value" [2] > section of the specification. Can you point out more precisely the position of the change? I looked into the section twice and could not find a change from the working draft to the editors draft. Olaf
Received on Saturday, 11 October 2008 17:25:23 UTC