Enumeration HrzProtocol.BlendMode
Defined in hrz/protocol/color/color.proto.
See https://en.wikipedia.org/wiki/Blend_modes
BLEND_NORMAL (0)
No color blending.
BLEND_MULTIPLY (1)
Applies the source to the hightones of the destination.
BLEND_SCREEN (2)
Applies the source to the lowtones of the destination.
BLEND_OVERLAY (3)
Applied the source to the midtones of the destination.