Nvidia 5500 Manuel D’Utilisation

NVIDIA Corporation

 Quadro FX 4500/5500 SDI User’s Guide– Version 2.0

C

HAPTER

 5

API Control

);

This function is the same as XNVCTRLSetAttribute(), and returns True if the operation 
succeeds, otherwise False.

XNVCTRLQueryAttribute() 

Bool XNVCTRLQueryAttribute (

    Display *dpy,

    int screen,

    unsigned int display_mask,

    unsigned int attribute,

    int *value

);

This function returns True if the attribute exists, otherwise False.

If XNVCTRLQueryAttribute returns True, value will contain the value of the specified 
attribute. Not all attributes require the display_mask parameter. See 

 for details.

 Possible errors:

• BadValue - The screen doesnʹt exist.

• BadMatch - The NVIDIA driver is not present on that screen.

XNVCTRLQueryStringAttribute() 

Bool XNVCTRLQueryStringAttribute (

    Display *dpy,

    int screen,

    unsigned int display_mask,

    unsigned int attribute,

    char **ptr

);

This function returns True if the attribute exists, otherwise False.

If XNVCTRLQueryStringAttribute returns True, *ptr will point to an allocated string 
containing the string attribute requested.  It is  the callerʹs responsibility to free the string 
when done.

Possible errors: