MTLBlendOperation.add
Add portions of both source and destination pixel values.
Declaration
case addDiscussion
RGB = Source.rgb * SBF + Dest.rgb * DBF
A = Source.a * SBF + Dest.a * DBF
Add portions of both source and destination pixel values.
case addRGB = Source.rgb * SBF + Dest.rgb * DBF
A = Source.a * SBF + Dest.a * DBF