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#1321 closed enhancement (wontfix)

scrolling for the osx shadow server

Reported by:	Antoine Martin	Owned by:	Antoine Martin
Priority:	major	Milestone:	4.0
Component:	platforms	Version:	trunk
Keywords:	osx shadow scrolling	Cc:

Description

Follow up from #1232, osx has an API to give us those rectangles: CGScreenUpdateMoveCallback.
It shouldn't be too hard to add this callback to the osx shadow server, it will be a little bit more difficult to bypass most of the screen damage logic to go straight to the "scrolling" encoder.

Attachments (2)

osx-shadow-scrolling.patch (5.5 KB) - added by Antoine Martin 5 years ago.: attempt to use CGScreenRegisterMoveCallback
osx-shadow-scrolling-v2.patch (5.6 KB) - added by Antoine Martin 20 months ago.: updated patch

Download all attachments as: .zip

Change History (7)

Changed 5 years ago by Antoine Martin

Attachment:	osx-shadow-scrolling.patch added

attempt to use CGScreenRegisterMoveCallback

comment:1 Changed 5 years ago by Antoine Martin

Status:	new → assigned

The patch above fails with a cryptic error message: SystemError: error return without exception set.

Maybe we'll need to use Cython to get this to work. PITA.

Last edited 5 years ago by Antoine Martin (previous) (diff)

comment:2 Changed 4 years ago by Antoine Martin

Milestone:	3.0 → 3.1

comment:3 Changed 3 years ago by Antoine Martin

Milestone:	3.1 → 4.0

Milestone renamed

Changed 20 months ago by Antoine Martin

Attachment:	osx-shadow-scrolling-v2.patch added

updated patch

comment:4 Changed 20 months ago by Antoine Martin

Resolution:	→ wontfix
Status:	assigned → closed

Even with the latest pyobjc 6.1 and the refreshed patch, registering for the callback fails:

Traceback (most recent call last):
  File "/Users/antoine/Desktop/Xpra.app/Contents/Resources/lib/python/xpra/server/shadow/shadow_server_base.py", line 431, in _process_map_window
    self.start_refresh(wid)
  File "/Users/antoine/Desktop/Xpra.app/Contents/Resources/lib/python/xpra/platform/darwin/shadow_server.py", line 162, in start_refresh
    err = CG.CGScreenRegisterMoveCallback(self.screen_move_callback, None)
SystemError: <built-in function CGScreenRegisterMoveCallback> returned NULL without setting an error

And this API is deprecated anyway, in favour of the Quartz Display Streaming API