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/*
* Copyright 2015 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "SkUtils.h"
namespace { // See Sk4px.h
static_assert(sizeof(Sk4px) == 16, "This file uses memcpy / sk_memset32, so exact size matters.");
inline Sk4px Sk4px::DupPMColor(SkPMColor px) {
Sk4px px4 = Sk16b();
sk_memset32((uint32_t*)&px4, px, 4);
return px4;
}
inline Sk4px Sk4px::Load4(const SkPMColor px[4]) {
Sk4px px4 = Sk16b();
memcpy(&px4, px, 16);
return px4;
}
inline Sk4px Sk4px::Load2(const SkPMColor px[2]) {
Sk4px px2 = Sk16b();
memcpy(&px2, px, 8);
return px2;
}
inline Sk4px Sk4px::Load1(const SkPMColor px[1]) {
Sk4px px1 = Sk16b();
memcpy(&px1, px, 4);
return px1;
}
inline void Sk4px::store4(SkPMColor px[4]) const { memcpy(px, this, 16); }
inline void Sk4px::store2(SkPMColor px[2]) const { memcpy(px, this, 8); }
inline void Sk4px::store1(SkPMColor px[1]) const { memcpy(px, this, 4); }
inline Sk4px::Wide Sk4px::widenLo() const {
return Sk16h((*this)[ 0], (*this)[ 1], (*this)[ 2], (*this)[ 3],
(*this)[ 4], (*this)[ 5], (*this)[ 6], (*this)[ 7],
(*this)[ 8], (*this)[ 9], (*this)[10], (*this)[11],
(*this)[12], (*this)[13], (*this)[14], (*this)[15]);
}
inline Sk4px::Wide Sk4px::widenHi() const { return this->widenLo() << 8; }
inline Sk4px::Wide Sk4px::widenLoHi() const { return this->widenLo() + this->widenHi(); }
inline Sk4px::Wide Sk4px::mulWiden(const Sk16b& other) const {
return this->widenLo() * Sk4px(other).widenLo();
}
inline Sk4px Sk4px::Wide::addNarrowHi(const Sk16h& other) const {
Sk4px::Wide r = (*this + other) >> 8;
return Sk16b(r[ 0], r[ 1], r[ 2], r[ 3],
r[ 4], r[ 5], r[ 6], r[ 7],
r[ 8], r[ 9], r[10], r[11],
r[12], r[13], r[14], r[15]);
}
inline Sk4px Sk4px::Wide::div255() const {
// Calculated as ((x+128) + ((x+128)>>8)) >> 8.
auto v = *this + Sk16h(128);
return v.addNarrowHi(v>>8);
}
inline Sk4px Sk4px::alphas() const {
static_assert(SK_A32_SHIFT == 24, "This method assumes little-endian.");
return Sk16b((*this)[ 3], (*this)[ 3], (*this)[ 3], (*this)[ 3],
(*this)[ 7], (*this)[ 7], (*this)[ 7], (*this)[ 7],
(*this)[11], (*this)[11], (*this)[11], (*this)[11],
(*this)[15], (*this)[15], (*this)[15], (*this)[15]);
}
inline Sk4px Sk4px::Load4Alphas(const SkAlpha a[4]) {
return Sk16b(a[0], a[0], a[0], a[0],
a[1], a[1], a[1], a[1],
a[2], a[2], a[2], a[2],
a[3], a[3], a[3], a[3]);
}
inline Sk4px Sk4px::Load2Alphas(const SkAlpha a[2]) {
return Sk16b(a[0], a[0], a[0], a[0],
a[1], a[1], a[1], a[1],
0,0,0,0,
0,0,0,0);
}
inline Sk4px Sk4px::zeroAlphas() const {
static_assert(SK_A32_SHIFT == 24, "This method assumes little-endian.");
return Sk16b((*this)[ 0], (*this)[ 1], (*this)[ 2], 0,
(*this)[ 4], (*this)[ 5], (*this)[ 6], 0,
(*this)[ 8], (*this)[ 9], (*this)[10], 0,
(*this)[12], (*this)[13], (*this)[14], 0);
}
inline Sk4px Sk4px::zeroColors() const {
static_assert(SK_A32_SHIFT == 24, "This method assumes little-endian.");
return Sk16b(0,0,0, (*this)[ 3],
0,0,0, (*this)[ 7],
0,0,0, (*this)[11],
0,0,0, (*this)[15]);
}
} // namespace
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