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authorKeith Packard <keithp@keithp.com>2013-07-26 18:46:45 -0700
committerKeith Packard <keithp@keithp.com>2020-03-29 13:47:09 -0700
commit3f2af30bd94ea3012bc1d1bde82f7c9a1c4dea27 (patch)
tree7373ec89b489d2edfe0c8c1a329cac12c932ea1e /transform.c
parent46dac260d384e034aaabd576d9b818d39f4821c6 (diff)
Add support for the 'Present' extension. [v3]
This makes updating the eyes nicely vblank synchronized. v2: Ensure extensions exist before calling query_version These calls add calls to xcb_get_extension_data before calling query_version calls, as those calls will mark the connection with an error if made against an X server without the extension present. Suggested-by: Uli Schlachter <psychon@znc.in> v3: check the 'present' field in the return from xcb_get_extension_data; the xcb_get_extension_data call will always succeed (save for out of memory), the only way to tell if the extension is supported in the target X server is to test the 'present' field in the query extension reply value. Signed-off-by: Keith Packard <keithp@keithp.com>
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