Using a shader
Once
a Pixel Bender shader is available in ActionScript as a Shader object,
it can be used in several ways:
Shader drawing fill: The shader defines the fill portion
of a shape drawn using the drawing api
Blend mode: The shader defines the blend between two overlapping
display objects
Filter: The shader defines a filter that modifies the appearance
of visual content
Stand-alone shader processing: The shader processing runs
without specifying the intended use of the output. The shader can
optionally run in the background, with the result is available when
the processing completes. This technique can be used to generate
bitmap data and also to process non-visual data.