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
10static_assert(sizeof(Sk4px) == 16, "This file uses memcpy / sk_memset32, so exact size matters.");
11
12inline Sk4px::Sk4px(SkPMColor px) {
13    sk_memset32((uint32_t*)this, px, 4);
14}
15
16inline Sk4px Sk4px::Load4(const SkPMColor px[4]) {
17    Sk4px px4 = Sk16b();
18    memcpy(&px4, px, 16);
19    return px4;
20}
21
22inline Sk4px Sk4px::Load2(const SkPMColor px[2]) {
23    Sk4px px2 = Sk16b();
24    memcpy(&px2, px, 8);
25    return px2;
26}
27
28inline Sk4px Sk4px::Load1(const SkPMColor px[1]) {
29    Sk4px px1 = Sk16b();
30    memcpy(&px1, px, 4);
31    return px1;
32}
33
34inline void Sk4px::store4(SkPMColor px[4]) const { memcpy(px, this, 16); }
35inline void Sk4px::store2(SkPMColor px[2]) const { memcpy(px, this,  8); }
36inline void Sk4px::store1(SkPMColor px[1]) const { memcpy(px, this,  4); }
37
38inline Sk4px::Wide Sk4px::widenLo() const {
39    return Sk16h(this->kth< 0>(), this->kth< 1>(), this->kth< 2>(), this->kth< 3>(),
40                 this->kth< 4>(), this->kth< 5>(), this->kth< 6>(), this->kth< 7>(),
41                 this->kth< 8>(), this->kth< 9>(), this->kth<10>(), this->kth<11>(),
42                 this->kth<12>(), this->kth<13>(), this->kth<14>(), this->kth<15>());
43}
44
45inline Sk4px::Wide Sk4px::widenHi() const { return this->widenLo() << 8; }
46
47inline Sk4px::Wide Sk4px::mulWiden(const Sk16b& other) const {
48    return this->widenLo() * Sk4px(other).widenLo();
49}
50
51inline Sk4px Sk4px::Wide::addNarrowHi(const Sk16h& other) const {
52    Sk4px::Wide r = (*this + other) >> 8;
53    return Sk16b(r.kth< 0>(), r.kth< 1>(), r.kth< 2>(), r.kth< 3>(),
54                 r.kth< 4>(), r.kth< 5>(), r.kth< 6>(), r.kth< 7>(),
55                 r.kth< 8>(), r.kth< 9>(), r.kth<10>(), r.kth<11>(),
56                 r.kth<12>(), r.kth<13>(), r.kth<14>(), r.kth<15>());
57}
58
59inline Sk4px Sk4px::alphas() const {
60    static_assert(SK_A32_SHIFT == 24, "This method assumes little-endian.");
61    return Sk16b(this->kth< 3>(), this->kth< 3>(), this->kth< 3>(), this->kth< 3>(),
62                 this->kth< 7>(), this->kth< 7>(), this->kth< 7>(), this->kth< 7>(),
63                 this->kth<11>(), this->kth<11>(), this->kth<11>(), this->kth<11>(),
64                 this->kth<15>(), this->kth<15>(), this->kth<15>(), this->kth<15>());
65}
66
67inline Sk4px Sk4px::Load4Alphas(const SkAlpha a[4]) {
68    return Sk16b(a[0], a[0], a[0], a[0],
69                 a[1], a[1], a[1], a[1],
70                 a[2], a[2], a[2], a[2],
71                 a[3], a[3], a[3], a[3]);
72}
73
74inline Sk4px Sk4px::Load2Alphas(const SkAlpha a[2]) {
75    return Sk16b(a[0], a[0], a[0], a[0],
76                 a[1], a[1], a[1], a[1],
77                 0,0,0,0,
78                 0,0,0,0);
79}
80
81inline Sk4px Sk4px::zeroAlphas() const {
82    static_assert(SK_A32_SHIFT == 24, "This method assumes little-endian.");
83    return Sk16b(this->kth< 0>(), this->kth< 1>(), this->kth< 2>(), 0,
84                 this->kth< 4>(), this->kth< 5>(), this->kth< 6>(), 0,
85                 this->kth< 8>(), this->kth< 9>(), this->kth<10>(), 0,
86                 this->kth<12>(), this->kth<13>(), this->kth<14>(), 0);
87}
88
89inline Sk4px Sk4px::zeroColors() const {
90    static_assert(SK_A32_SHIFT == 24, "This method assumes little-endian.");
91    return Sk16b(0,0,0, this->kth< 3>(),
92                 0,0,0, this->kth< 7>(),
93                 0,0,0, this->kth<11>(),
94                 0,0,0, this->kth<15>());
95}
96
97