Am 2014-03-20 22:55, schrieb Keith Packard:
tbh, without an PBO, this is wrose than the fb fallback as it's one
stall per span.
Yes, it's completely miserable. However, it will never be called as the
only paths to get here are short-circuited above this in the driver.
The
only way to even test this code is to disable much of the remaining
acceleration code.
Also with PBO, it's still a huge overhead per span. I guess it's
faster
for lots of spans (maybe 20+) to always fall back to fb.
But I don't see another non-hacky way to implement this.
And, as it won't be executed in the future, we'd best leave it as
simple
as possible. Bits of the X 2D API are 'sub-optimally designed' :-)
The simplest way is to always fall back to fb. So I think we shouldn't
implement get_spans at all but fb.
_______________________________________________
[email protected]: X.Org development
Archives: http://lists.x.org/archives/xorg-devel
Info: http://lists.x.org/mailman/listinfo/xorg-devel
