Railo 4.2 Reference
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Function IMAGESETDRAWINGALPHA

Sets the current drawing alpha for images. All subsequent graphics operations use the specified alpha.

Example

imagesetdrawingalpha(any name,number alpha):void

Arguments

The arguments for this function are set. You can not use other arguments except the following ones.
Name Type Required Description
name any  Yes The image on which this operation is performed.  
alpha number  Yes a floating point number in range 0-1