diff options
Diffstat (limited to 'man/XPresentQueryCapabilities.man')
| -rw-r--r-- | man/XPresentQueryCapabilities.man | 73 |
1 files changed, 73 insertions, 0 deletions
diff --git a/man/XPresentQueryCapabilities.man b/man/XPresentQueryCapabilities.man new file mode 100644 index 0000000..0ee06f1 --- /dev/null +++ b/man/XPresentQueryCapabilities.man @@ -0,0 +1,73 @@ +.\" +.\" +.\" Copyright © 2013 Keith Packard +.\" +.\" Permission to use, copy, modify, distribute, and sell this software and its +.\" documentation for any purpose is hereby granted without fee, provided that +.\" the above copyright notice appear in all copies and that both that copyright +.\" notice and this permission notice appear in supporting documentation, and +.\" that the name of the copyright holders not be used in advertising or +.\" publicity pertaining to distribution of the software without specific, +.\" written prior permission. The copyright holders make no representations +.\" about the suitability of this software for any purpose. It is provided "as +.\" is" without express or implied warranty. +.\" +.\" THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, +.\" INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO +.\" EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR +.\" CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, +.\" DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER +.\" TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE +.\" OF THIS SOFTWARE. +.\" +.de TQ +.br +.ns +.TP \\$1 +.. +.TH XPresentQueryCapabilities __libmansuffix__ __xorgversion__ +.SH NAME +XPresentQueryCapabilities \- query capabilities of a CRTC +.SH SYNTAX +\&#include <X11/extensions/Xpresent.h> +.nf +.sp +uint32_t XPresentQueryCapabilities \^(\^Display *\fIdisplay\fP, XID \fItarget\fP\^)\^; +.fi +.SH DESCRIPTION +.B XPresentQueryCapabilities +returns a bitmask of the supported capabilities for the target CRTC. If +\fItarget\fP is a CRTC, then it is used as the target CRTC. If +\fItarget\fP is a WINDOW, then the target CRTC is selected by the +X server from among the CRTCs on the screen specified by the window. +.PP +\fBPresentCapabilityAsync\fP means that the target device can flip +the scanout buffer mid-frame instead of waiting for a vertical +blank interval. The precise latency between the flip request +and the actual scanout transition is not defined by this +specification, but is intended to be no more than a few +scanlines. +.PP +\fBPresentCapabilityFence\fP means that the target device can take +advantage of SyncFences in the \fBPresent\fP operations to improve +GPU throughput. The driver must operate correctly in the +absence of fences, but may have reduced performance. Using +fences for drivers not advertising this capability should have +no performance impact. +.PP +\fBPresentCapabilityUST\fP means that the target device can scanout +the image at an arbitrary UST time value, and is not driven by +a periodic scanout timer. Applications specifying UST times for +.BR XPresentPixmap (__libmansuffix__) +can expect that their image will appear to +the user within a short amount of time from that specified in +the request. The precise accuracy of the scanout time is not +defined by the extension, but is expected to be on the order +of milliseconds or less. +.SH SEE ALSO +.BR Xpresent (__libmansuffix__), +.BR XPresentNotifyMSC (__libmansuffix__), +.BR XPresentPixmap (__libmansuffix__), +.BR XPresentSelectInput (__libmansuffix__) +.SH AUTHORS +Keith Packard, Intel |