Alpha Composition
Arithmetic and Logical Operations

## Modules

| AlphaCompC
| Composite two images using constant alpha values.
| AlphaPremulC
| Premultiplies pixels of an image using a constant alpha value.
| AlphaComp
| Composite two images using alpha opacity values contained in each image.
| AlphaPremul
| Premultiplies image pixels by image alpha opacity values.

## Detailed Description

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