Nvidia Quadro FX 4800 User Manual page 78

C 5
HAPTER
API Control
XNVCTRLSetGvoColorConversion()
void XNVCTRLSetGvoColorConversion (
);
This function sets the color conversion matrix, offset, and scale that should be used for
GVO (Graphic to Video Out).
The Color Space Conversion data is ordered as follows:
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
where the data is used according to the following formulae:
•
74
Display *dpy,
int screen,
float colorMatrix[3][3],
float colorOffset[3],
float colorScale[3]
colorMatrix[0][0] // r.Y
colorMatrix[0][1] // g.Y
colorMatrix[0][2] // b.Y
colorMatrix[1][0] // r.Cr
colorMatrix[1][1] // g.Cr
colorMatrix[1][2] // b.Cr
colorMatrix[2][0] // r.Cb
colorMatrix[2][1] // g.Cb
colorMatrix[2][2] // b.Cb
colorOffset[0] // Y
colorOffset[1] // Cr
colorOffset[2] // Cb
colorScale[0] // Y
colorScale[1] // Cr
colorScale[2] // Cb
Y = colorOffset[0] + colorScale[0] *
(R * colorMatrix[0][0] + G * colorMatrix[0][1] + B * colorMatrix[0][2]);
Quadro FX 4800/5800 and Quadro CX SDI User's Guide– Version 1.0
NVIDIA Corporation