Nv_Ctrl_Gvo Attributes - Nvidia Quadro FX 4800 User Manual

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Possible errors:
• BadMatch ‐ The NVIDIA driver is not present on that screen.
• BadImplementation ‐ GVO is not available on that screen.
XNVCTRLQueryGvoColorConversion()
Bool XNVCTRLQueryGvoColorConversion (
);
This function retrieves the color conversion matrix and color offset that are currently
being used for GVO (Graphic to Video Out). The values are ordered within the arrays
according to the comments for XNVCTRLSetGvoColorConversion().
Possible errors:
• BadMatch ‐ The NVIDIA driver is not present on that screen.
• BadImplementation ‐ GVO is not available on that screen.

NV_CTRL_GVO Attributes

The NV_CTRL_GVO* integer attributes are used to configure GVO (graphics to video
out) functionality on the Quadro FX 4800/5800 SDI graphics board.
The following is a typical usage pattern for the GVO attributes:
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NVIDIA Corporation
Quadro FX 4800/5800 and Quadro CX SDI User's Guide – Version 1.0
Cr = colorOffset[1] + colorScale[1] *
(R * colorMatrix[1][0] + G * colorMatrix[1][1] + B * colorMatrix[1][2]);
Cb = colorOffset[2] + colorScale[2] *
(R * colorMatrix[2][0] + G * colorMatrix[2][1] + B * colorMatrix[2][2]);
Display *dpy,
int screen,
float colorMatrix[3][3],
float colorOffset[3],
float colorScale[3]
Query NV_CTRL_GVO_SUPPORTED to determine if the X screen supports GV0.
Specify NV_CTRL_GVO_SYNC_MODE (either FREE_RUNNING, GENLOCK, or
C 5
HAPTER
API Control
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