Contents

sourceOut

A mode that you use to paint the source image onto the transparent parts of the background, while erasing the background.

Declaration

static var sourceOut: GraphicsContext.BlendMode { get }

Discussion

This mode implements the equation R = S*(1 - Da) where

  • R is the composite image.

  • S is the source image.

  • Da is the source background’s alpha value.

See Also

Accessing Porter-Duff modes