Microsoft DirectX 8.0

Alpha Setter Effect

Sets the alpha bits on a video image.

Class ID (CLSID): 506D89AE-909A-44f7-9444-ABD575896E35

CLSID Variable Name: CLSID_DxtAlphaSetter

Properties

Property Type Default Description
Alpha BYTE -1 Sets the alpha for the entire image.
AlphaRamp double -1.0 Sets the alpha as a percentage of the original alpha value.

Remarks

A property with a negative value is ignored. Only one property can have a non-negative value. The Alpha property specifies a constant alpha value for every pixel in the image. This property overwrites the alpha values from the original image. The AlphaRamp property specifies each pixel's alpha value as a percentage of the pixel's original value, from 0.0 to 1.0.

See Also

Alpha Blending