[Fluxus] double buffered pixel primitives?

[evan.raskob [lists]]

Hi Gabor,

I was thinking about this too, and I think its a good idea.  The only issue is, how will this effect performance, and will there be a way to make a primitive single-buffered, if we prefer to take charge of buffering manually? 

Cheers
Evan


On 19 Feb 2010, at 18:51, Salvatore Iaconesi wrote:

> 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