[cairo-bugs] [Bug 43397] EXTEND_NONE is used instead of EXTEND_PAD when src sample area is entirely within the surface

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=43397

--- Comment #39 from Karl Tomlinson <bugs.freedesktop at karlt.net> ---
(In reply to comment #37)
> Please notice that the X server is already detecting if the repeat mode
> actually matters or not and normalizing it to RepeatNone even without my
> patch.

The case it currently detects is optimized by drivers (because there is no
transform).

> The code should be extended to detect more cases when the repeat mode does
> not matter and tested (especially with radeon drivers).

Whether or not the X server / driver interface should know when it can turn a
slow operation into a fast operation, there is always the risk that the
server's detection algorithm won't cover all the cases in cairo's "doesn't
matter" detection for its mis-optimization.

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