...@yahoo.com
Sent: Thursday, September 5, 2013 7:51:02 PM
Subject: Re: vsync proposal
I had some off-thread discussion with Bas about lowering latency. We seem
to have agreed on the following plan:
On some non-main thread:
1. Wait for vsync event
2. Dispatch refresh driver ticks to all windows
On Sat, Sep 7, 2013 at 7:02 AM, Jeff Gilbert jgilb...@mozilla.com wrote:
Could you clarify number 2? It's a little dense.
A better way to state it is this: every layer tree update by the main
thread eventually gets a response in the form of a vsync-driven request to
tick the corresponding
On Fri, Sep 6, 2013 at 2:51 PM, Robert O'Callahan rob...@ocallahan.orgwrote:
On some non-main thread:
1. Wait for vsync event
2. Dispatch refresh driver ticks to all windows that don't already have a
pending refresh driver tick unacknowledged by a layer tree update response
3. Wait for N ms,
I had some off-thread discussion with Bas about lowering latency. We seem
to have agreed on the following plan:
On some non-main thread:
1. Wait for vsync event
2. Dispatch refresh driver ticks to all windows that don't already have a
pending refresh driver tick unacknowledged by a layer tree
PM
Subject: Re: vsync proposal
On Wed, Aug 14, 2013 at 9:39 PM, Bas Schouten bschou...@mozilla.com wrote:
From: Robert O'Callahan rob...@ocallahan.org
That would be good in some ways, but it doesn't handle off-main-thread
animation when the main thread's drawing is late (e.g. because
Subject: Re: vsync proposal
On Wed, Aug 14, 2013 at 12:13 PM, Bas Schouten bschou...@mozilla.comwrote:
Since you want composition to occur whenever drawing has occurred, I don't
really think it should really be what's working on doing any processing for
the vblank event. The VBlank
On Wed, Aug 14, 2013 at 9:39 PM, Bas Schouten bschou...@mozilla.com wrote:
From: Robert O'Callahan rob...@ocallahan.org
That would be good in some ways, but it doesn't handle off-main-thread
animation when the main thread's drawing is late (e.g. because the main
thread is stuck doing
On 2013-08-12, at 11:05 PM, Robert O'Callahan wrote:
Tell me what you think.
https://wiki.mozilla.org/User:Roc/VsyncProposal
A couple things that are not clear to me from this proposal:
- when the vsync event is sent?
- how does it deal with a blocking swapbuffers()?
- what happens in the
On Wed, Aug 14, 2013 at 2:13 AM, Jeff Muizelaar jmuizel...@mozilla.comwrote:
On 2013-08-12, at 11:05 PM, Robert O'Callahan wrote:
Tell me what you think.
https://wiki.mozilla.org/User:Roc/VsyncProposal
A couple things that are not clear to me from this proposal:
- when the vsync event
Subject: Re: vsync proposal
A couple things that are not clear to me from this proposal:
- when the vsync event is sent?
Depends on the platform. I believe on Windows we can call DwmFlush on a
helper thread and fire it when that returns.
Calling DwmFlush is bad. Calling
http
On Wed, Aug 14, 2013 at 12:13 PM, Bas Schouten bschou...@mozilla.comwrote:
Since you want composition to occur whenever drawing has occurred, I don't
really think it should really be what's working on doing any processing for
the vblank event. The VBlank event should just fire,
vladi...@mozilla.com, dev-platform@lists.mozilla.org, avih...@yahoo.com
Sent: Tuesday, August 13, 2013 6:25:03 PM
Subject: Re: vsync proposal
On Wed, Aug 14, 2013 at 12:13 PM, Bas Schouten bschou...@mozilla.comwrote:
Since you want composition to occur whenever drawing has occurred, I don't
I'm not sure you can ever achieve 'ideal' results when it comes to the
interaction between requestAnimationFrame and vsync. requestAnimationFrame
is fundamentally flawed for combining low latency with tearing-free
presentation because it conceptually ties updating, rendering and
presentation all
Tell me what you think.
https://wiki.mozilla.org/User:Roc/VsyncProposal
Rob
--
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le atrhtohu gthot sf oirng iyvoeu rs ihnesa.rt sS?o Whhei csha iids teoa
stiheer :p atroa lsyazye,d 'mYaonu,r sGients uapr,e tfaokreg
On Tue, Aug 13, 2013 at 3:05 PM, Robert O'Callahan rob...@ocallahan.orgwrote:
Tell me what you think.
https://wiki.mozilla.org/User:Roc/VsyncProposal
Forgot to mention --- this is the result of brainstorming with Matt Woodrow
and Nick Cameron this morning.
Rob
--
Jtehsauts tshaei dS,o n
platforms scales
well.
--Jet
- Original Message -
From: Robert O'Callahan rob...@ocallahan.org
To: dev-platform@lists.mozilla.org, Vladimir Vukicevic
vladi...@mozilla.com, avih...@yahoo.com, Bas Schouten
bschou...@mozilla.com
Sent: Monday, August 12, 2013 8:08:18 PM
Subject: Re: vsync
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