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| author |  mtklein <mtklein@chromium.org> | 2016-06-07 12:12:37 -0700 |
|---|---|---|
| committer |  Commit bot <commit-bot@chromium.org> | 2016-06-07 12:12:37 -0700 |
| commit | 3db2028126e12a9c1c1fb2f878d552a2de0e1452 (patch) | |
| tree | d851792e0ad76e61d51c42e03e429b14d2f21044 /gyp_skia | |
| parent | 12dfaaa53c23f3d03050bde8f64136ac1f44164a (diff) | |
linear -> sRGB: use fast approximate sqrt()
Since we're already approximating the sRGB gamma curve with a sqrt(), we might
as well approximate with it a faster approximate sqrt(). On Intel, this
.rsqrt().invert() version is 2-3x faster than .sqrt() (~3x faster on older
machines, ~2x faster on newer machines).
This should provide ~11 bits of precision, suspiciously exactly enough.
Running dm --config srgb, there are diffs, but none perceptible.
BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2046063002
Review-Url: https://codereview.chromium.org/2046063002
Diffstat (limited to 'gyp_skia')
0 files changed, 0 insertions, 0 deletions