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 /bench/BlurBench.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 'bench/BlurBench.cpp')
| -rw-r--r-- | bench/BlurBench.cpp | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/bench/BlurBench.cpp b/bench/BlurBench.cpp index 20afd4a2e5..5b94d66ff6 100644 --- a/bench/BlurBench.cpp +++ b/bench/BlurBench.cpp @@ -15,9 +15,11 @@ #define MINI 0.01f #define SMALL SkIntToScalar(2) -#define REAL 1.5f +#define REAL 0.5f #define BIG SkIntToScalar(10) #define REALBIG 100.5f +// The value that produces a sigma of just over 2. +#define CUTOVER 2.6f static const char* gStyleName[] = { "normal", @@ -111,5 +113,6 @@ DEF_BENCH(return new BlurBench(BIG, kNormal_SkBlurStyle, SkBlurMaskFilter::kHigh DEF_BENCH(return new BlurBench(REALBIG, kNormal_SkBlurStyle, SkBlurMaskFilter::kHighQuality_BlurFlag);) DEF_BENCH(return new BlurBench(REAL, kNormal_SkBlurStyle, SkBlurMaskFilter::kHighQuality_BlurFlag);) +DEF_BENCH(return new BlurBench(CUTOVER, kNormal_SkBlurStyle, SkBlurMaskFilter::kHighQuality_BlurFlag);) DEF_BENCH(return new BlurBench(0, kNormal_SkBlurStyle);) |