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

See also

DXVA-HD

Direct3D Video Structures

Media Foundation Structures