On Sep 21, 2010, at 9:04 PM, Siarhei Siamashka wrote:
But now returning back to this issue. Ideally, PAD repeat would be a
better
default instead of NONE. Just because NONE repeat is a bit strange and
hard to accelerate in hardware. This is one example from
freedesktop.org
bugzilla (and there are more similar reports):
https://bugs.freedesktop.org/show_bug.cgi?id=27954
Rather than PAD being the default, I think NONE should be changed to
the equivalent of:
- intersecting the current clip with a quadrilateral that is equal
to the bounds of the source surface transformed to the destination
- draw the image using PAD REPEAT
- restore the clip to as before.
The result is the black edges of the image are sharp antialiased lines
no matter what the transform.
This is in fact what users expect, and also what other graphics
libraries are doing (which explains why the hardware is supporting PAD
directly).
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