diff options
Diffstat (limited to 'src/core/SkNx.h')
-rw-r--r-- | src/core/SkNx.h | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/src/core/SkNx.h b/src/core/SkNx.h index 84f9b69353..895b972dd1 100644 --- a/src/core/SkNx.h +++ b/src/core/SkNx.h @@ -92,6 +92,12 @@ public: static SkNf Load(const T vals[N]) { return SkNf(SkNf<N/2,T>::Load(vals), SkNf<N/2,T>::Load(vals+N/2)); } + // FromBytes() and toBytes() specializations may assume their argument is N-byte aligned. + // E.g. Sk4f::FromBytes() may assume it's reading from a 4-byte-aligned pointer. + // Converts [0,255] bytes to [0.0, 255.0] floats. + static SkNf FromBytes(const uint8_t bytes[N]) { + return SkNf(SkNf<N/2,T>::FromBytes(bytes), SkNf<N/2,T>::FromBytes(bytes+N/2)); + } SkNf(T a, T b) : fLo(a), fHi(b) { REQUIRE(N==2); } SkNf(T a, T b, T c, T d) : fLo(a,b), fHi(c,d) { REQUIRE(N==4); } @@ -101,6 +107,12 @@ public: fLo.store(vals); fHi.store(vals+N/2); } + // Please see note on FromBytes(). + // Truncates [0.0,256.0) floats to [0,255] bytes. Other inputs are unspecified. + void toBytes(uint8_t bytes[N]) const { + fLo.toBytes(bytes); + fHi.toBytes(bytes+N/2); + } SkNi<N,I> castTrunc() const { return SkNi<N,I>(fLo.castTrunc(), fHi.castTrunc()); } @@ -201,8 +213,10 @@ public: SkNf() {} explicit SkNf(T val) : fVal(val) {} static SkNf Load(const T vals[1]) { return SkNf(vals[0]); } + static SkNf FromBytes(const uint8_t bytes[1]) { return SkNf((T)bytes[0]); } void store(T vals[1]) const { vals[0] = fVal; } + void toBytes(uint8_t bytes[1]) const { bytes[0] = (uint8_t)(fVal); } SkNi<1,I> castTrunc() const { return SkNi<1,I>(fVal); } |