[Gegl-developer] in-place buffers

[Daniel Rogers <daniel@xxxxxxxxxxxxxxxxx>]

As for a scheme, would it be worthwhile to simply set a property (like 
"in-place") of the ImageData object to true or false, and then insist 
that every Op know how to deal with objects where the destination may 
overlap with the source?

Op's could check the value of "in-place" if they need to compensate for 
overlapping buffers (like my implementation of Copy, which would be a 
null op for in-place buffers, though Fade, I have noticed would need no 
change).

For binary ops, you could insist that only one Image be operated on in 
place, or assume the left one is in-place if they both try to be. 
However, if the code is overlap safe, you could take care of the 
overlapping regions in the instantiation init code, simply setting 
destination to the correct input.

You could, in fact, even use copy in order to create a new buffer to 
operate on in place from that point forward.

--
Daniel S. Rogers