XvQueryAdaptors(3) libXv Functions XvQueryAdaptors(3) NAME XvQueryAdaptors - return adaptor information for a screen SYNOPSIS #include <X11/extensions/Xvlib.h> int XvQueryAdaptors(Display *dpy, Window window, unsigned int *p_num_adaptors, XvAdaptorInfo **pp_adaptor_info); ARGUMENTS dpy Specifies the connection to the X server. window Specifies a window of the screen for which the adaptor information is desired. p_num_adaptors A pointer to where the number of adaptors for the specified screen is returned. pp_adaptor_info A pointer to where the list of returned adaptor information is re- turned. DESCRIPTION XvQueryAdaptors(3) returns an video adaptor information for the screen of the specified draw- able. The XvAdaptorInfo structure has the following organization: typedef struct { XvPortID base_id; unsigned long num_ports; char type; char *name; unsigned long num_formats; XvFormat *formats; unsigned long num_adaptors; } XvAdaptorInfo; base_id The resource ID of the first adaptor port. num_ports The number of ports supported by the adaptor. type A bit mask with the value XvInputMask asserted if the adaptor sup- ports video input, and value XvOutputMask asserted if the adaptor supports video output. In Xv protocol 2.2 and later, there are 3 new bits defined - XvVideoMask, XvStillMask and XvImageMask indi- cating that the adaptor is capable of video, still or image primi- tives respectively. name A vendor specific name that identifies the adaptor. num_formats The number of depth/visual id formats supported by the adaptor. formats A pointer to an array of XvFormat structures. The XvFormat structure has the following organization: typedef struct { char depth; unsigned long visual_id; } XvFormat; depth A drawable depth supported by the adaptor. visual_id A visual-id supported for the given depth by the adaptor. RETURN VALUES [Success] Returned if XvQueryAdaptors(3) completed successfully. [XvBadExtension] Returned if the Xv extension is unavailable. [XvBadAlloc] Returned if XvQueryAdaptors(3) failed to allocate memory to process the request. DIAGNOSTICS [Drawable] Returned if the requested drawable does not exist. SEE ALSO XvFreeAdaptorInfo(3) X Version 11 libXv 1.0.13 XvQueryAdaptors(3)
NAME | SYNOPSIS | ARGUMENTS | DESCRIPTION | RETURN VALUES | DIAGNOSTICS | SEE ALSO
Want to link to this manual page? Use this URL:
<https://man.freebsd.org/cgi/man.cgi?query=XvQueryAdaptors&sektion=3&manpath=FreeBSD+Ports+15.1.quarterly>