821f5e8dfe
I just kind of remembered that if we're doing (xy+x)/256 and x is a destination channel and y is 255-sa, then you can get the +x for free by multiplying by 256-sa instead. (d * (255-sa) + d) (d * (255-sa + 1)) (d * (256-sa) ) Duh. This is a trick we play in a lot of legacy code and I've just now realized it's exactly equivalent to the trick I want to play here... sigh. Folding this math in kind of makes mul/mad_unorm8 moot. Speed's getting good: I32_SWAR: 0.3 ns/px I32 : 0.55 ns/px F32 : 0.8 ns/px RP : 0.8 ns/px Opts : 0.2 ns/px Change-Id: I4d10db51ea80a3258c36e97b6b334ad253804613 Reviewed-on: https://skia-review.googlesource.com/c/skia/+/220708 Reviewed-by: Herb Derby <herb@google.com> Commit-Queue: Mike Klein <mtklein@google.com> |
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| bench | ||
| bin | ||
| dm | ||
| docker | ||
| docs/examples | ||
| example | ||
| experimental | ||
| fuzz | ||
| gm | ||
| gn | ||
| include | ||
| infra | ||
| modules | ||
| platform_tools | ||
| resources | ||
| samplecode | ||
| site | ||
| specs | ||
| src | ||
| tests | ||
| third_party | ||
| tools | ||
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| .gitignore | ||
| .gn | ||
| AUTHORS | ||
| BUILD.gn | ||
| codereview.settings | ||
| CONTRIBUTING | ||
| CQ_COMMITTERS | ||
| DEPS | ||
| go.mod | ||
| go.sum | ||
| LICENSE | ||
| OWNERS | ||
| PRESUBMIT.py | ||
| public.bzl | ||
| README | ||
| README.chromium | ||
| whitespace.txt | ||
Skia is a complete 2D graphic library for drawing Text, Geometries, and Images. See full details, and build instructions, at https://skia.org.