"Blend One Zero" means "Blend Off"?

Unity Engine
1

In Unity5, is “Blend One Zero” equivalent to “Blend Off” ?

In built-in StandardShaderGUI.cs:

2744104--197830--20160808182241.png
2744104--197830--20160808182241.png754×228 4.52 KB

I can not find any code like ‘blend off’ .

2

This mean that your source texture replace your backround without any blending.
1 * srcColor + 0 * dstColor

3

Yeah, they have same result, but, ‘Blend Off’ has no blend operation, I want to know if ‘Blend One Zero’ will be handled as ‘Blend Off’ by Unity engine