D3D12DDI_VIDEO_PROCESS_ALPHA_BLENDING_0020 structure (d3d12umddi.h)

Specifies whether alpha blending is enabled and, if so, the planar alpha value.

Syntax

typedef struct D3D12DDI_VIDEO_PROCESS_ALPHA_BLENDING_0020 {
  BOOL  Enable;
  FLOAT Alpha;
} D3D12DDI_VIDEO_PROCESS_ALPHA_BLENDING_0020;

Members

Enable

Specifies whether alpha blending is enabled.

Alpha

The planar alpha value. The value can range from 0.0 (transparent) to 1.0 (opaque). If the Enable member is false, this value is ignored.

Remarks

For each pixel, the destination color value is computed as the following:

Cd = Cs * (As * Ap * Ae) + Cd * (1.0 - As * Ap * Ae)

The variables in this equation are as follows:

• Cd = The color value of the destination pixel.
• Cs = The color value of the source pixel.
• As = The per-pixel source alpha.
• Ap = The planar alpha value.
• Ae = The palette-entry alpha value, or 1.0.

Requirements