diff options
| author |  Mike Klein <mtklein@chromium.org> | 2016-11-29 12:46:58 -0500 |
|---|---|---|
| committer | Mike Klein <mtklein@chromium.org> | 2016-11-29 17:53:47 +0000 |
| commit | bddd234181fccb73af148d327386270e61197de9 (patch) | |
| tree | 25f96aff7edf7c0ca73d5098360f9075081ed0cd /src/opts | |
| parent | f9f451213a3951d8a61568998de2ddbd643f6693 (diff) | |
document x_tail encoding
CQ_INCLUDE_TRYBOTS=skia.primary:Test-Ubuntu-GCC-GCE-CPU-AVX2-x86_64-Release-SKNX_NO_SIMD
Change-Id: Id9a6d00e68a7cf7464c6a561bd97e63abf6886c4
Reviewed-on: https://skia-review.googlesource.com/5307
Reviewed-by: Herb Derby <herb@google.com>
Diffstat (limited to 'src/opts')
| -rw-r--r-- | src/opts/SkRasterPipeline_opts.h | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/src/opts/SkRasterPipeline_opts.h b/src/opts/SkRasterPipeline_opts.h index 5d7d08a404..a8cefcfc4f 100644 --- a/src/opts/SkRasterPipeline_opts.h +++ b/src/opts/SkRasterPipeline_opts.h @@ -36,10 +36,14 @@ namespace { using SkNb = SkNx<N, uint8_t>; struct Stage; - using Fn = void(SK_VECTORCALL *)(Stage*, size_t, SkNf,SkNf,SkNf,SkNf, - SkNf,SkNf,SkNf,SkNf); + using Fn = void(SK_VECTORCALL *)(Stage*, size_t x_tail, SkNf,SkNf,SkNf,SkNf, + SkNf,SkNf,SkNf,SkNf); struct Stage { Fn next; void* ctx; }; + // x_tail encodes two values x and tail as x*N+tail, where 0 <= tail < N. + // x is the induction variable we're walking along, incrementing by N each step. + // tail == 0 means work with a full N pixels; otherwise use only the low tail pixels. + } // namespace #define SI static inline |