23 class Sk4px : public Sk16b {
25     Sk4px(const Sk16b& v) : INHERITED(v) {}  in Sk4px()  function
27     static Sk4px DupPMColor(SkPMColor c) {  in DupPMColor()
30         Sk4px v;  in DupPMColor()
35     Sk4px alphas() const;  // ARGB argb XYZW xyzw -> AAAA aaaa XXXX xxxx
36     Sk4px inv() const { return Sk16b(255) - *this; }  in inv()
39     static Sk4px Load4(const SkPMColor px[4]) {  in Load4()
40         Sk4px v;  in Load4()
44     static Sk4px Load2(const SkPMColor px[2]) {  in Load2()
45         Sk4px v;  in Load2()
49     static Sk4px Load1(const SkPMColor px[1]) {  in Load1()
50         Sk4px v;  in Load1()
56     static Sk4px Load4Alphas(const SkAlpha[4]);  // AaXx -> AAAA aaaa XXXX xxxx
57     static Sk4px Load2Alphas(const SkAlpha[2]);  // Aa   -> AAAA aaaa ???? ????
70         Sk4px addNarrowHi(const Sk16h&) const;
73         Sk4px div255() const;
90     Wide operator * (const Sk4px& o) const { return this->mulWiden(o); }
93     Sk4px operator + (const Sk4px& o) const { return INHERITED::operator+(o); }
94     Sk4px operator - (const Sk4px& o) const { return INHERITED::operator-(o); }
95     Sk4px operator < (const Sk4px& o) const { return INHERITED::operator<(o); }
96     Sk4px thenElse(const Sk4px& t, const Sk4px& e) const { return INHERITED::thenElse(t,e); }  in thenElse()
100     Sk4px approxMulDiv255(const Sk16b& o) const {  in approxMulDiv255()
116                 Sk4px dst0 = fn(Load4(src+0)),  in MapSrc()
146                 Sk4px dst0 = fn(Load4(dst+0), Load4(src+0)),  in MapDstSrc()
176                 Sk4px dst0 = fn(Load4(dst+0), Load4Alphas(a+0)),  in MapDstAlpha()
208                 Sk4px dst0 = fn(Load4(dst+0), Load4(src+0), Load4Alphas(a+0)),  in MapDstSrcAlpha()
232     Sk4px() = default;
237 static_assert(sizeof(Sk4px) == sizeof(Sk16b));
238 static_assert(sizeof(Sk4px) == 16);