Paul Cheyrou-lagreze wrote:
> Well, I should have downloaded that one...
> but filesize and so little explanation make me thinks it was another man-like... But no, it's a real book !
> So I've launched a long-long print, thanks a lot !!
>>>I've just realized the the OpenGL specification doesn't guaranty the integrity of the backbuffer
>>> after a Swap.
>>>Using Mesa I've never seen a "modifed" backbuffer after a swap, but I did see it on some 3d chips.
>>>Does Actual (and future) Mesa does, under certain condition, change
>>>the backbuffer content after a Swap ?
>>It would depend on the device driver, but as far as I know, existing drivers
>>simply copy the back buffer to the front, or a real swap (page flip) is used
>>by some DRI drivers.
>>>Or Will future implementations will ?
>>I can't predict that.
> I should have been clearer :
> My concern is only about the Mesa sofware implementation,
> not those accelerated version.
> (as they can handle a complete redraw after each swap without much performance loss).
> So my question was : Mesa as a software only library, Do not or will not change the current behavior of the actual swap ?
Core Mesa has no idea how the front/back buffer swap is handled. It's totally
up to the device driver. That said, the X11 driver uses a back->front copy
and that probably won't change. I really can't say what the future holds for