[cairo] [PATCH pixman 02/11] pixman-filter: Correct Simpsons integration
spitzak at gmail.com
Thu Sep 11 11:22:23 PDT 2014
Actually the previous version did 1,2,6,6...6,6,2,1. Since it divided by
3 it produced almost 2x the correct integration, though this was fixed
by the normalization later. It also did not do Simpsons integration,
instead it was much more like adding evenly-spaced samples.
On 09/10/2014 07:01 PM, Bill Spitzak wrote:
> Samples are multiplied in a 1,4,2,4,2,4,1 pattern, previous version
> did 1,2,4,4,4,2,1.
> I also reduced the number of samples greatly as there is no
> numerical difference with the filter functions.
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