[PD-dev] pbo transfert WAS: GEM passing output image later.

Cyrille Henry ch at chnry.net
Wed Feb 29 10:52:11 CET 2012



Le 29/02/2012 09:34, IOhannes m zmoelnig a écrit :

> and both [pix_texture] and [pix_snap] allow for asynchronous
> DMA-transfers already (though i only added PBO-tarnsfers to [pix_snap] a
> week ago or so).
> it's not really documented anywhere (yet), but you can send a [pbo $1(
> message to both these objects to specify the number of PBOs to use (with
> "0" being the default behaviour)

Do you mean that since last week pix_snap should be lot's faster than it use to be?

i'd like to understand a bit more the use of single  / multiple PBO :
what happens if 2 pix_video / pix_texture use the same PBO : will it be slower than using 2 different PBO? (since 2nd pix_texture have to wait for the PBO to be free in order to use it)???


same question with a pix_video / pix_texture and a pix_snap : is using 2 PBO lot's faster than using the same PBO (default behaviour)?

cheers
Cyrille



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