Manual Pages for UNIX Operating System command usage for man XvQueryPortAttributes

libXv Functions                        XvQueryPortAttributes(3xv)



NAME
     XvQueryPortAttributes - return list of attributes of a video
     port

SYNOPSIS
     cc [ flag... ] file... -lXv [ library... ]
     #include 

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

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.




X Version 11        Last change: libXv 1.0.5                    1






libXv Functions                        XvQueryPortAttributes(3xv)



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

SEE ALSO
     XvGetPortAttribute(3xv), XvSetPortAttribute(3xv)


ATTRIBUTES
     See attributes(5) for descriptions of the  following  attri-
     butes:

     ____________________________________________________________
    |       ATTRIBUTE TYPE        |       ATTRIBUTE VALUE       |
    |_____________________________|_____________________________|
    | Availability                | x11/library/libxv           |
    |_____________________________|_____________________________|
    | Interface Stability         | Volatile                    |
    |_____________________________|_____________________________|
    | MT-Level                    | See XInitThreads(3X11)      |
    |_____________________________|_____________________________|


































X Version 11        Last change: libXv 1.0.5                    2