DXVAHDDDI_COLOR_RGBA - NtDoc
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// d3dumddi.h
typedef struct _DXVAHDDDI_COLOR_RGBA {
[in] FLOAT R;
[in] FLOAT G;
[in] FLOAT B;
[in] FLOAT A;
} DXVAHDDDI_COLOR_RGBA;
View the official Windows Driver Kit DDI referenceNo description available.
The DXVAHDDDI_COLOR_RGBA structure describes color in RGB terms.
R [in]A FLOAT value in the 0.0 to 1.0 range that is used to describe the red component of the RGB color.
G [in]A FLOAT value in the 0.0 to 1.0 range that is used to describe the green component of the RGB color.
B [in]A FLOAT value in the 0.0 to 1.0 range that is used to describe the blue component of the RGB color.
A [in]A FLOAT value in the 0.0 to 1.0 range that is used to describe the alpha component (that is, the transparency level) of the RGB color.
The setting of DXVAHDDDI_COLOR_RGBA for full range RGB black with opaque alpha is (0.0, 0.0, 0.0, 1.0). The setting of DXVAHDDDI_COLOR_RGBA for limited range RGB black with half transparent alpha is (0.0625, 0.0625, 0.0625, 0.5), which is (0, 0, 0, 255) and (16, 16, 16, 128) respectively when 8-bit presentation is used.
R, G, and B values can be out of the [0.0, 1.0] range for wide gamut format (for example, for XR_BIAS, FP16, and FP32 formats).
A DXVAHDDDI_COLOR_YCbCrA structure is specified in the RGB member of the DXVAHDDDI_COLOR union to specify the color in RGB terms.