Document and test ImageFilter factories
Project Member Reported by email@example.com, Mar 7 2014
Now that we use factories to create imagefilter subclasses (which is good), we should take advantage of this. 1. check the inputs for sanity, and return NULL if they don't make sense 2. document and write tests to exercise #1 3. look for more aggressive special-cases, and return different subclasses based on the input params as we see the opportunity (e.g. gradientshader factory does this).
Oct 14 2014,
Dec 7 2015,
Jan 28 2016,
Apr 6 2018,
The ImageFilterFuzzer work took care of #1 and #2. If there's work remaining for #3, feel free to reopen.
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