Nvidia 5500 ユーザーズマニュアル
NVIDIA Corporation
80
Quadro FX 4500/5500 SDI User’s Guide– Version 2.0
C
HAPTER
5
API Control
XNVCTRLSetGvoColorConversion()
void XNVCTRLSetGvoColorConversion (
Display *dpy,
int screen,
float colorMatrix[3][3],
float colorOffset[3],
float colorScale[3]
);
This function sets the color conversion matrix, offset, and scale that should be used for
GVO (Graphic to Video Out).
GVO (Graphic to Video Out).
The Color Space Conversion data is ordered as follows:
•
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
where the data is used according to the following formulae:
•
Y = colorOffset[0] + colorScale[0] *
(R * colorMatrix[0][0] + G * colorMatrix[0][1] + B * colorMatrix[0][2]);