[]
D2D1_BLEND_OPERATION
public enum BlendOperation
Add = 1
D2D1_BLEND_OPERATION_ADD
Maximum = 5
D2D1_BLEND_OPERATION_MAX
Minimum = 4
D2D1_BLEND_OPERATION_MIN
ReverseSubtract = 3
D2D1_BLEND_OPERATION_REV_SUBTRACT
Subtract = 2
D2D1_BLEND_OPERATION_SUBTRACT