DXVAHD_COLOR_RGBA structure (dxvahd.h)
Specifies an RGB color value.
Syntax
typedef struct _DXVAHD_COLOR_RGBA {
FLOAT R;
FLOAT G;
FLOAT B;
FLOAT A;
} DXVAHD_COLOR_RGBA;
Members
R
The red value.
G
The green value.
B
The blue value.
A
The alpha value. Values range from 0 (transparent) to 1 (opaque).
Remarks
The RGB values have a nominal range of [0...1]. For an RGB format with n bits per channel, the value of each color component is calculated as follows:
val = f * ((1 << n)-1)
For example, for RGB-32 (8 bits per channel), val = BYTE(f * 255.0).
For full-range RGB, reference black is (0.0, 0.0, 0.0), which corresponds to (0, 0, 0) in an 8-bit representation. For limited-range RGB, reference black is (0.0625, 0.0625, 0.0625), which corresponds to (16, 16, 16) in an 8-bit representation. For wide-gamut formats, the values might fall outside of the [0...1] range.
Requirements
| Requirement | Value |
|---|---|
| Minimum supported client | Windows 7 [desktop apps only] |
| Minimum supported server | Windows Server 2008 R2 [desktop apps only] |
| Header | dxvahd.h |