Clamp Layer

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About Clamp Layer

Clamp layer is used to limit colours to a certain range of component values.

The R, G, B and A (alpha) components of each pixel are forced to lie within the range Floor...Ceiling.

If "Clamp Ceiling" is off, then only the Floor is considered.

If "Invert Negative" is on, then a pixel with a value of A less than Floor is first negated (-R, -G, -B, -A) and then something funny happens to raise all the components to at least Floor. Any ideas what this is for?

Parameters of Clamp Layer

The parameters of the Clamp Layers are:

Name	Value	Type
Invert Negative		bool
Clamp Ceiling		bool
Ceiling	1.000000	real
Floor	0.000000	real

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