netbsd man page for xvqueryportattributes

XvQueryPortAttributes(3)					  libXv Functions					  XvQueryPortAttributes(3)

NAME
       XvQueryPortAttributes - return list of attributes of a video port

SYNOPSIS
       #include <X11/extensions/Xvlib.h>

       XvAttribute* XvQueryPortAttributes(Display *dpy,
			XvPortID port,	int *p_num_attributes);

ARGUMENTS
       dpy     Specifies the connection to the X server.

       port    Specifies the port whose adaptor is to be queried for its list of attributes.

       p_num_attributes
	       A pointer to where the number of attributes returned in the array is written.

DESCRIPTION
       XvQueryPortAttributes(3)returnsthenumberofattributes  and  an  array of XvAttributes valid for the given port.  The array may be freed with
       XFree(3).

RETURN VALUES
       XvAttribute has the following structure:

	   typedef struct {
	     int flags;
	     int min_value;
	     int max_value;
	     char *name;
	   } XvAttribute;

       flags   May be XvGettable or XvSettable or both OR'd together indicating the particular attribute is readable, writeable  or  readable  and
	       writeable.

       min_value
	       The minimum attribute values which are valid for the driver.

	       The maximum attribute values which are valid for the driver.

       name    A string describing the name of the attribute that may be used to retrieve the Atom for the particular attribute.

DIAGNOSTICS
       [XvBadPort]
	       Generated if the requested port does not exist.

SEE ALSO
       XvGetPortAttribute(3), XvSetPortAttribute(3)

X Version 11							    libXv 1.0.7 					  XvQueryPortAttributes(3)