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OpenDiablo2/d2core/d2render/composite_mode.go

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package d2render
type CompositeMode int
const (
// Regular alpha blending
// c_out = c_src + c_dst × (1 - α_src)
CompositeModeSourceOver = CompositeMode(1)
// c_out = 0
CompositeModeClear = CompositeMode(2)
// c_out = c_src
CompositeModeCopy = CompositeMode(3)
// c_out = c_dst
CompositeModeDestination = CompositeMode(4)
// c_out = c_src × (1 - α_dst) + c_dst
CompositeModeDestinationOver = CompositeMode(5)
// c_out = c_src × α_dst
CompositeModeSourceIn = CompositeMode(6)
// c_out = c_dst × α_src
CompositeModeDestinationIn = CompositeMode(7)
// c_out = c_src × (1 - α_dst)
CompositeModeSourceOut = CompositeMode(8)
// c_out = c_dst × (1 - α_src)
CompositeModeDestinationOut = CompositeMode(9)
// c_out = c_src × α_dst + c_dst × (1 - α_src)
CompositeModeSourceAtop = CompositeMode(10)
// c_out = c_src × (1 - α_dst) + c_dst × α_src
CompositeModeDestinationAtop = CompositeMode(11)
// c_out = c_src × (1 - α_dst) + c_dst × (1 - α_src)
CompositeModeXor = CompositeMode(12)
// Sum of source and destination (a.k.a. 'plus' or 'additive')
// c_out = c_src + c_dst
CompositeModeLighter = CompositeMode(13)
)