Adjusts the parameters of a particular layer of the image stack. The parameter StackLayer specifies which layer has to be adjusted (valid range: 1 ... 8). The Visibility may assume the following values:
0 ... hide the specified layer
1 ... show the specified layer
2 ... show the specified layer and hide all other layers
The parameter BlendWgt determines the opacity of the corresponding layer and may assume values between 0 and 100 (percent). A value of -1 leaves the blending weight unchanged.
The parameter BlendMode controls the type of the combination (see the section on the image stack for details):
-1 ... do not change the blending mode
0 ... Opaque
1 ... Mix
2 ... Add
3 ... Subtract
4 ... Multiply
5 ... Min
6 ... Max
7 ... Difference
8 ... Exclusion
9 ... WhiteMix
10 ... HSI Fusion
11 ... Brovey
The function returns the following error codes:
0 ... everything is OK
-1 ... StackLayer does not exist
-2 ... invalid BlendWgt
-3 ... invalid BlendMode
-4 ... invalid Visibility
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