87 lines
2.4 KiB
Groff
87 lines
2.4 KiB
Groff
.TH XvQueryAdaptors __libmansuffix__ __vendorversion__
|
|
.SH Name
|
|
XvQueryAdaptors \- return adaptor information for a screen
|
|
.\"
|
|
.SH Syntax
|
|
.B #include <X11/extensions/Xvlib.h>
|
|
.sp
|
|
.nf
|
|
.BI "XvQueryAdaptors(Display *" dpy ", Window " window ",
|
|
.BI " unsigned int *" p_num_adaptors ",
|
|
.BI " XvAdaptorInfo **" pp_adaptor_info ");"
|
|
.fi
|
|
.SH Arguments
|
|
.\"
|
|
.IP \fIdpy\fR 8
|
|
Specifies the connection to the X server.
|
|
.IP \fIwindow\fR 8
|
|
Specifies a window of the screen for which the adaptor
|
|
information is desired.
|
|
.IP \fIp_num_adaptors\fR 8
|
|
A pointer to where the number of adaptors for the specified screen
|
|
is returned.
|
|
.IP \fIpp_adaptor_info\fR 8
|
|
A pointer to where the list of returned adaptor information is
|
|
returned.
|
|
.\"
|
|
.SH Description
|
|
.\"
|
|
XvQueryAdaptors(__libmansuffix__) returns an video adaptor information for
|
|
the screen of the specified drawable. The XvAdaptorInfo structure
|
|
has the following organization:
|
|
.EX
|
|
|
|
typedef struct {
|
|
XvPortID base_id;
|
|
unsigned long num_ports;
|
|
char type;
|
|
char *name;
|
|
unsigned long num_formats;
|
|
XvFormat *formats;
|
|
unsigned long num_adaptors;
|
|
} XvAdaptorInfo;
|
|
|
|
.EE
|
|
.IP \fIbase_id\fR 8
|
|
The resource ID of the first adaptor port.
|
|
.IP \fInum_ports\fR 8
|
|
The number of ports supported by the adaptor.
|
|
.IP \fItype\fR 8
|
|
A bit mask with the value XvInputMask asserted if the adaptor supports video
|
|
input, and value XvOutputMask asserted if the adaptor supports video output.
|
|
.IP \fIname\fR 8
|
|
A vendor specific name that identifies the adaptor.
|
|
.IP \fInum_formats\fR 8
|
|
The number of depth/visual id formats supported by the adaptor.
|
|
.IP \fIformats\fR 8
|
|
A pointer to an array of XvFormat structures.
|
|
.PP
|
|
The XvFormat structure has the following organization:
|
|
.EX
|
|
|
|
typedef struct {
|
|
char depth;
|
|
unsigned long visual_id;
|
|
} XvFormat;
|
|
|
|
.EE
|
|
.IP \fIdepth\fR 8
|
|
A drawable depth supported by the adaptor.
|
|
.IP \fIvisual_id\fR 8
|
|
A visual-id supported for the given depth by the adaptor.
|
|
.\"
|
|
.SH Returned Values
|
|
.IP [Success] 8
|
|
Returned if XvQueryAdaptors(__libmansuffix__) completed successfully.
|
|
.IP [XvBadExtension] 8
|
|
Returned if the Xv extension is unavailable.
|
|
.IP [XvBadAlloc] 8
|
|
Returned if XvQueryAdaptors(__libmansuffix__) failed to allocate memory to process
|
|
the request.
|
|
.SH Diagnostics
|
|
.IP [Drawable] 8
|
|
Returned if the requested drawable does not exist.
|
|
.SH See Also
|
|
XvFreeAdaptorInfo(__libmansuffix__)
|
|
.\"
|