spitzak at d2.com
Tue Sep 7 12:02:25 PDT 2004
On Tuesday 07 September 2004 11:31 am, Keith Packard wrote:
> Around 9 o'clock on Sep 7, Bill Spitzak wrote:
> > The only good reason for the current implementation is for thread safety.
> The other reason is that we can extend the matrix specification without
> affecting existing programs. It would be nice to support projective
> transformations at some point, but we don't know how to stroke curves under
> such a transformation yet.
It could be defined from the start as being a 4x4 matrix, and indicate that
certain entries are ignored and must be 1 or 0 for future compatability. Or
the 4x4 matrix could be a different type with new calls that take it.
I don't think anybody should assumme that getting the matrix and then putting
it back is a substitute for gsave/grestore.
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