Nvidia Quadro CX SDI, Руководство пользователя

Страница: 75 / 92

NVIDIA Corporation
Quadro FX 4800/5800 and Quadro CX SDI User’s Guide – Version 1.0 71
C
HAPTER
5
API Control
);
This function returns True if the extension exists, False otherwise.
major
and
minor
are
the extension ʹ s 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 75 for details.
Possible errors:
• BadValue ‐ The screen or attribute doesn ʹ t 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