From: Steinar H. Gunderson <sgunderson@bigfoot.com>
Date: Thu, 24 Sep 2015 00:12:40 +0000 (+0200)
Subject: In ResampleEffect, precompute the Lanczos function into a table.
X-Git-Tag: 1.2.0~1
X-Git-Url: https://git.sesse.net/?a=commitdiff_plain;h=6f1efa8348a90a393187c12d70fd10d81bbd2c99;hp=6f1efa8348a90a393187c12d70fd10d81bbd2c99;p=movit

In ResampleEffect, precompute the Lanczos function into a table.

A 2048-element table (with linear interpolation between the elements)
is seemingly enough to get down to beyond float epsilon, and this
saves a lot of CPU time when computing large filter kernels.
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