diff options
| author |  Herbert Derby <herb@google.com> | 2017-10-20 14:53:45 -0400 |
|---|---|---|
| committer |  Skia Commit-Bot <skia-commit-bot@chromium.org> | 2017-11-16 18:06:22 +0000 |
| commit | 5e18cdea0a0a3f23d8e8b8140c82a4b54e121402 (patch) | |
| tree | 20df99a3ea7ed5cb80eac3fcb0438b167cf028ec /src/core/SkGaussFilter.cpp | |
| parent | 3b2f5b60ff9a82ade01746d7e7cbbcc9348d6c03 (diff) | |
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>
Diffstat (limited to 'src/core/SkGaussFilter.cpp')
| -rw-r--r-- | src/core/SkGaussFilter.cpp | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/src/core/SkGaussFilter.cpp b/src/core/SkGaussFilter.cpp index 548ff4398d..c0d612ddec 100644 --- a/src/core/SkGaussFilter.cpp +++ b/src/core/SkGaussFilter.cpp @@ -143,10 +143,9 @@ SkGaussFilter::SkGaussFilter(double sigma, Type type) { } } -int SkGaussFilter::filterDouble(double* values) const { +int SkGaussFilter::filterDouble(double values[5]) const { for (int i = 0; i < fN; i++) { values[i] = fBasis[i]; } return fN; } - |