1XvGetPortAttribute(3)           libXv Functions          XvGetPortAttribute(3)
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NAME

6       XvGetPortAttribute - return current port attribute value
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SYNOPSIS

9       #include <X11/extensions/Xvlib.h>
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11       int XvGetPortAttribute(Display *dpy, XvPortID port,
12                              Atom attribute, int p_value);
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ARGUMENTS

15       dpy         Specifies the connection to the X server.
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17       port        Specifies  the port, associated with the given display, for
18                   which the attribute values are to be returned.
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20       attribute   An atom that identifies the attribute to be queried by this
21                   request.   Control atoms are obtained using the XInternAtom
22                   request with a string from the following table.
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24       p_value     Pointer to the location where the attribute value is  writ‐
25                   ten on return.
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DESCRIPTION

28       XvGetPortAttribute(3)  returns  the current value of the requested port
29       attribute in the integer pointed to by p_value.  The attribute is iden‐
30       tified  using  an Atom that equates to the attribute name.  The XInter‐
31       nAtom request can be used with one of the strings  below  to  return  a
32       matching Atom.
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34       ─────────────────────────────────────────────────────
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36              Attribute String   Type             Default
37       ─────────────────────────────────────────────────────
38       "XV_ENCODING"      XvEncodingID     Server dependent
39       "XV_HUE"           [-1000...1000]   0
40       "XV_SATURATION"    [-1000...1000]   0
41       "XV_BRIGHTNESS"    [-1000...1000]   0
42       "XV_CONTRAST"      [-1000...1000]   0
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RETURN VALUES

45       [Success]
46               Returned if XvGetPortAttribute(3) completed successfully.
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48       [XvBadExtension]
49               Returned if the Xv extension is unavailable.
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51       [XvBadAlloc]
52               Returned  if XvGetPortAttribute(3) failed to allocate memory to
53               process the request.
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DIAGNOSTICS

56       [XvBadPort]
57               Generated if the requested port does not exist.
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59       [BadMatch]
60               Generated if the requested attribute atom does not  specify  an
61               attribute supported by the adaptor.
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SEE ALSO

64       XvSetPortAttribute(3), XvPortNotify(3)
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68X Version 11                     libXv 1.0.11            XvGetPortAttribute(3)
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