Direct evaluation of gaussian
The SVG(CSS) standard allows the 3 pass algorithm for sigma >= 2. But
sigma < 2, the code must evaluate to the convolution. The old code used
an interpolation scheme between windowed filters. This code directly
evaluates the gaussian kernel for sigma < 2.
This code produces cleaner results, is 25% faster, and does not use a
temporary memory buffer.
Change-Id: Ibd0caa73cadd06b637f55ba7bd4fefcfe7ac73db
Reviewed-on: https://skia-review.googlesource.com/62540
Commit-Queue: Herb Derby <herb@google.com>
Reviewed-by: Mike Klein <mtklein@google.com>
4 files changed