On Tue, Mar 11, 2003 at 10:15:51AM -0800, Daniel Rogers wrote:
> Alpha is a measure of the amount of coverage of the pixel.  (e.g. an 
> alpha of .5 means half the pixel is covered).  In particular, 0 alpha 
> means that the pixel is not covered at all.  This means that the pixel 
> contributes NO color information.  I think this should hold for blur as 
> well.  And from that point of view, no pixel with alpha zero should ever 
> contribute color information.

How do you propose this being implemented, ie. what value would you plug into
the IIR filter GIMP's blur is based on, for a pixel with alpha != 255?

/* Steinar */
Homepage: http://www.sesse.net/
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