[Fluxus] double buffered pixel primitives?

[gabor papp]

hi,

i was thinking about implementing double buffering for pixel primitives. 
the reason for this that there's an opengl restriction that you cannot 
use the texture of the fbo on itself. this makes things complicated, for 
instance if we want to have feedback effects, we need two pixel 
primitives to copy the contents of the first one to the other. also with 
plugins you cannot use a pixel primitive as input and output at the same 
time. it gets more cumbersome if we would like to apply more plugins to 
the same pixel primitive. i believe that double buffering would solve 
these issues. i was thinking to have two textures bound to the fbo, and 
we could access the previous frame texture with (pixel->ptexture) for 
example. the plugins would use the previous frame texture as input and 
the current frame as output, and would swap them after processing. this 
should not introduce any problems with the usual pixel primitive usage. 
any ideas or objections about this?

best,
gabor