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Change SkUnitScalarClampToByte to more accurate implementation.

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The previous implementation was likely more efficient when SkScalar was SkFixed.

BUG=skia:4632
GOLD_TRYBOT_URL= https://gold.skia.org/search2?unt=true&query=source_type%3Dgm&master=false&issue=1691403002

Review URL: https://codereview.chromium.org/1691403002
This commit is contained in:
benjaminwagner 2016-02-24 10:07:52 -08:00 committed by Commit bot
parent 3719886415
commit f156ea3c3e
1 changed files with 1 additions and 7 deletions
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8
include/core/SkColorPriv.h
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@ -224,13 +224,7 @@ static inline int SkAlphaBlend255(S16CPU src, S16CPU dst, U8CPU alpha) {
}
static inline U8CPU SkUnitScalarClampToByte(SkScalar x) {
if (x < 0) {
return 0;
}
if (x >= SK_Scalar1) {
return 255;
}
return SkScalarToFixed(x) >> 8;
return static_cast<U8CPU>(SkScalarPin(x, 0, 1) * 255 + 0.5);
}
#define SK_R16_BITS 5