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| author | ThomasHunger <ThomasHunger> | 2007-05-11 08:08:54 -0800 |
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| committer | ThomasHunger <ThomasHunger> | 2007-05-11 08:08:54 -0800 |
| commit | d2318ce5b008ea50a378ce5700857fb8e599a622 (patch) | |
| tree | 5fc06a9f8f4170472daabb2f03c5e7fa844427a6 /XcbNotes.mdwn | |
| parent | 7b7abd88660125e01da0d16e5031a82d9bc48203 (diff) | |
XcbNotes
Diffstat (limited to 'XcbNotes.mdwn')
| -rw-r--r-- | XcbNotes.mdwn | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/XcbNotes.mdwn b/XcbNotes.mdwn index e6b64d1..9ed6e80 100644 --- a/XcbNotes.mdwn +++ b/XcbNotes.mdwn @@ -23,3 +23,12 @@ Hope this helps. Comment welcome. Double buffering on X is kind of a mess. Here's documentation on the [Multi-Buffering](XcbNotes/buffer.pdf) and [XDBE](XcbNotes/dbe.pdf) extensions in case someone wants to write a protocol description for XCB. Note: Multibuffer is deprecated in favour of DBE. It also seems that DBE is deprecated. See [this](http://lists.freedesktop.org/archives/xcb/2006-August/001854.html) thread. A conversation with keithp indicates that his current thinking is that the right way to do double buffering is via an explicit copy from a separate pixmap. This is portable to absolutely everywhere, and requires no magic. Probably there will soon be a convention for the compositing manager to handle the double buffering on systems where one is running, since it needs to buffer anyhow. But this would be in the future. + +### checked vs. unchecked + +The plan 7 error handling follows the these rules. + +1. If a request has no reply (xcb\_void\_cookie\_t) the default is to call unchecked. To check the result use xxx\_checked. +2. If a request has a reply cookie, the default is to call checked. If you are not interested in checking, use xxx\_unchecked. + +[(see this mail)](http://lists.freedesktop.org/archives/xcb/2007-April/002760.html) |