[Bug 10799] drawImage/pattern filters underspecified

http://www.w3.org/Bugs/Public/show_bug.cgi?id=10799

--- Comment #17 from Philip Taylor <excors@gmail.com> 2010-12-08 00:19:11 UTC ---
The language isn't ideal, but I'm not sure how better to describe it in prose -
if you can suggest changes that would make it clearer, that would be great.

Canvas provides the primitives to emulate any filtering effect (take the source
image and surround it with transparency or repeats or clamped edges, then clip
to a rectangle) so I'm not sure what you mean with that.

The advantage I see in the repeat-in-both-directions pattern filtering is just
that it seems the easiest way for browsers to converge (without being a clearly
crazy behaviour to converge on). IE appears to implement it already; Opera is
not far off. Firefox doesn't support repeat-x or repeat-y yet so it will have
to change in any case, and per comment 8 it looks like the Cairo API doesn't
like different extend modes in different directions, so it will be simpler to
use consistent modes. Is this incorrect?

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Received on Wednesday, 8 December 2010 00:19:13 UTC