1 /* 2 * Copyright 2015 Google Inc. 3 * 4 * Use of this source code is governed by a BSD-style license that can be 5 * found in the LICENSE file. 6 */ 7 8 #include "SkUtils.h" 9 10 namespace { // See Sk4px.h 11 12 static_assert(sizeof(Sk4px) == 16, "This file uses memcpy / sk_memset32, so exact size matters."); 13 14 inline Sk4px Sk4px::DupPMColor(SkPMColor px) { 15 Sk4px px4 = Sk16b(); 16 sk_memset32((uint32_t*)&px4, px, 4); 17 return px4; 18 } 19 20 inline Sk4px Sk4px::Load4(const SkPMColor px[4]) { 21 Sk4px px4 = Sk16b(); 22 memcpy(&px4, px, 16); 23 return px4; 24 } 25 26 inline Sk4px Sk4px::Load2(const SkPMColor px[2]) { 27 Sk4px px2 = Sk16b(); 28 memcpy(&px2, px, 8); 29 return px2; 30 } 31 32 inline Sk4px Sk4px::Load1(const SkPMColor px[1]) { 33 Sk4px px1 = Sk16b(); 34 memcpy(&px1, px, 4); 35 return px1; 36 } 37 38 inline void Sk4px::store4(SkPMColor px[4]) const { memcpy(px, this, 16); } 39 inline void Sk4px::store2(SkPMColor px[2]) const { memcpy(px, this, 8); } 40 inline void Sk4px::store1(SkPMColor px[1]) const { memcpy(px, this, 4); } 41 42 inline Sk4px::Wide Sk4px::widenLo() const { 43 return Sk16h((*this)[ 0], (*this)[ 1], (*this)[ 2], (*this)[ 3], 44 (*this)[ 4], (*this)[ 5], (*this)[ 6], (*this)[ 7], 45 (*this)[ 8], (*this)[ 9], (*this)[10], (*this)[11], 46 (*this)[12], (*this)[13], (*this)[14], (*this)[15]); 47 } 48 49 inline Sk4px::Wide Sk4px::widenHi() const { return this->widenLo() << 8; } 50 51 inline Sk4px::Wide Sk4px::widenLoHi() const { return this->widenLo() + this->widenHi(); } 52 53 inline Sk4px::Wide Sk4px::mulWiden(const Sk16b& other) const { 54 return this->widenLo() * Sk4px(other).widenLo(); 55 } 56 57 inline Sk4px Sk4px::Wide::addNarrowHi(const Sk16h& other) const { 58 Sk4px::Wide r = (*this + other) >> 8; 59 return Sk16b(r[ 0], r[ 1], r[ 2], r[ 3], 60 r[ 4], r[ 5], r[ 6], r[ 7], 61 r[ 8], r[ 9], r[10], r[11], 62 r[12], r[13], r[14], r[15]); 63 } 64 65 inline Sk4px Sk4px::Wide::div255() const { 66 // Calculated as ((x+128) + ((x+128)>>8)) >> 8. 67 auto v = *this + Sk16h(128); 68 return v.addNarrowHi(v>>8); 69 } 70 71 inline Sk4px Sk4px::alphas() const { 72 static_assert(SK_A32_SHIFT == 24, "This method assumes little-endian."); 73 return Sk16b((*this)[ 3], (*this)[ 3], (*this)[ 3], (*this)[ 3], 74 (*this)[ 7], (*this)[ 7], (*this)[ 7], (*this)[ 7], 75 (*this)[11], (*this)[11], (*this)[11], (*this)[11], 76 (*this)[15], (*this)[15], (*this)[15], (*this)[15]); 77 } 78 79 inline Sk4px Sk4px::Load4Alphas(const SkAlpha a[4]) { 80 return Sk16b(a[0], a[0], a[0], a[0], 81 a[1], a[1], a[1], a[1], 82 a[2], a[2], a[2], a[2], 83 a[3], a[3], a[3], a[3]); 84 } 85 86 inline Sk4px Sk4px::Load2Alphas(const SkAlpha a[2]) { 87 return Sk16b(a[0], a[0], a[0], a[0], 88 a[1], a[1], a[1], a[1], 89 0,0,0,0, 90 0,0,0,0); 91 } 92 93 inline Sk4px Sk4px::zeroAlphas() const { 94 static_assert(SK_A32_SHIFT == 24, "This method assumes little-endian."); 95 return Sk16b((*this)[ 0], (*this)[ 1], (*this)[ 2], 0, 96 (*this)[ 4], (*this)[ 5], (*this)[ 6], 0, 97 (*this)[ 8], (*this)[ 9], (*this)[10], 0, 98 (*this)[12], (*this)[13], (*this)[14], 0); 99 } 100 101 inline Sk4px Sk4px::zeroColors() const { 102 static_assert(SK_A32_SHIFT == 24, "This method assumes little-endian."); 103 return Sk16b(0,0,0, (*this)[ 3], 104 0,0,0, (*this)[ 7], 105 0,0,0, (*this)[11], 106 0,0,0, (*this)[15]); 107 } 108 109 } // namespace 110
