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Quadro FX 4500/5500 SDI User’s Guide – Version 2.0 77
C
HAPTER 5
API Control
);
This function returns True if the extension exists, False otherwise.
major
and
minor
are
the extensionʹs major and minor version numbers.
XNVCTRLIsNvScreen()
Bool XNVCTRLIsNvScreen (
Display *dpy,
int screen
);
This function returns True is the specified screen is controlled by the NVIDIA driver,
otherwise False.
XNVCTRLSetAttribute()
void XNVCTRLSetAttribute (
Display *dpy,
int screen,
unsigned int display_mask,
unsigned int attribute,
int value
);
This function sets the attribute to the given value. Not all attributes require the
display_mask parameter. See “NV_CTRL_GVO Attributes” on page 67 for details.
Possible errors:
• BadValue - The screen or attribute doesnʹt exist.
• BadMatch - The NVIDIA driver is not present on that screen.
XNVCTRLSetAttributeAndGetStatus()
Bool XNVCTRLSetAttributeAndGetStatus (
Display *dpy,
int screen,
unsigned int display_mask,
unsigned int attribute,
int value