Class: Vips::BlendMode

Inherits:

Symbol

Overview

Blend mode to use when compositing images. See Image#composite.

:clear where the second object is drawn, the first is removed
:source the second object is drawn as if nothing were below
:over the image shows what you would expect if you held two semi-transparent slides on top of each other
:in the first object is removed completely, the second is only drawn where the first was
:out the second is drawn only where the first isn't
:atop this leaves the first object mostly intact, but mixes both objects in the overlapping area
:dest leaves the first object untouched, the second is discarded completely
:dest_over like :over, but swaps the arguments
:dest_in like :in, but swaps the arguments
:dest_out like :out, but swaps the arguments
:dest_atop like :atop, but swaps the arguments
:xor something like a difference operator
:add a bit like adding the two images
:saturate a bit like the darker of the two
:multiply at least as dark as the darker of the two inputs
:screen at least as light as the lighter of the inputs
:overlay multiplies or screens colors, depending on the lightness
:darken the darker of each component
:lighten the lighter of each component
:colour_dodge brighten first by a factor second
:colour_burn darken first by a factor of second
:hard_light multiply or screen, depending on lightness
:soft_light darken or lighten, depending on lightness
:difference difference of the two
:exclusion somewhat like :difference, but lower-contrast