The blending state combines 
    
    
    
    
    
    
    
    
    
    
    
    
BlendEquation and BlendFunction and the
enabled flag to define the full blending state for combining source and
destination fragments when rendering.
This is a helper when using custom render states with Appearance#renderState.
Members
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    Blending is enabled using additive blending,source(source.alpha) + destination.
- 
    
    Blending is enabled using alpha blending,source(source.alpha) + destination(1 - source.alpha).
- 
    
    Blending is disabled.
- 
    
    Blending is enabled using alpha blending with premultiplied alpha,source + destination(1 - source.alpha).
