linuxaudio.org

On Tue, Feb 22, 2011 at 04:38:05PM -0500, Paul Davis wrote:
> what its going to do,i think, is two-fold:

quoted text
>

> 1) promote more and more toolkit design that makes everything just a

> compositing stack. GTK has already moved significantly in this

> direction, but could go a lot further.

> ....

Makes perfect sense. And indeed X is old, large parts of it

have become more or less useless, and there is certainly room

for something new. If and when that arises and gets 50% of the

maturity of X then I'll be happy to use it. Meanwhile I see no

reason to do so, certainly not if the only thing gained is to

make my software run on smartphones and other toys. It's just

not meant for that market.
> 2) more and more apps able to take advantage of v-blank sync to reduce

quoted text
> computational load due to unnecessary redraws. instead, the whole

> system will be a lot like a video-framebuffer version of JACK: the

> vblank interrupt arrives. everything with a surface gets a chance to

> redraw if it needs to, the surfaces are composited together, and boom,

> its on the display.

Two remarks on this:
1. Syncing updates to the video frame rate of course makes sense,

and there is no reason why it couldn't be done in X. All it takes

is some support from the driver to generate an event at the right

time.
2. But at the same time this is sort of backwards. There is no reason

today why a computer display should be driven by a 'video' signal that

refreshes the complete screen at a fixed rate. *That* itself is very

old technology and completely useless in this age.
Ciao,
--

FA
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