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MAN page from Mandriva 2009 libxv1-devel-1.0.4-2mdv2009.1.i586.rpm

XvGetPortAttribute

Section: C Library Functions (3)
Updated: libXv 1.0.4
Index 

Name

XvGetPortAttribute - return current port attribute value 

Syntax

#include <X11/extensions/Xvlib.h>

XvGetPortAttribute(Display *dpy, XvPortID port,                   Atom attribute, int p_value);
 

Arguments

dpy
Specifies the connection to the X server.
port
Specifies the port, associated with the given display, forwhich the attribute values are to be returned.
attribute
An atom that identifies the attribute to be queried by thisrequest. Control atoms are obtained using the XInternAtomrequest with a string from the following table.
p_value
Pointer to the location where the attribute value is written onreturn.
 

Description

XvGetPortAttribute(3) returns the current value of the requestedport attribute in the integer pointed to by p_value. The attribute is identified using an Atom that equates to the attribute name. The XInternAtom request can be used with one of the stringsbelow to return a matching Atom.

Attribute String        Type             Default"XV_ENCODING"           XvEncodingID     Server dependent"XV_HUE"                [-1000...1000]   0"XV_SATURATION"         [-1000...1000]   0"XV_BRIGHTNESS"         [-1000...1000]   0"XV_CONTRAST"           [-1000...1000]   0
 

Returned Values

[Success]
Returned if XvGetPortAttribute(3) completed successfully.
[XvBadExtension]
Returned if the Xv extension is unavailable.
[XvBadAlloc]
Returned if XvGetPortAttribute(3) failed to allocate memory to processthe request.
 

Diagnostics

[XvBadPort]
Generated if the requested port does not exist.
[BadMatch]
Generated if the requested attribute atom does not specify an attribute supported by the adaptor.
 

See Also

XvSetPortAttribute(3), XvPortNotify(3)


 

Index

Name
Syntax
Arguments
Description
Returned Values
Diagnostics
See Also

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