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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 
SkPMFloat(SkPMColor c)8 inline SkPMFloat::SkPMFloat(SkPMColor c) {
9     *this = SkPMFloat::FromARGB(SkGetPackedA32(c),
10                                 SkGetPackedR32(c),
11                                 SkGetPackedG32(c),
12                                 SkGetPackedB32(c));
13     SkASSERT(this->isValid());
14 }
15 
trunc()16 inline SkPMColor SkPMFloat::trunc() const {
17     return SkPackARGB32(this->a(), this->r(), this->g(), this->b());
18 }
19 
round()20 inline SkPMColor SkPMFloat::round() const {
21     SkPMColor c = SkPackARGB32(this->a()+0.5f, this->r()+0.5f, this->g()+0.5f, this->b()+0.5f);
22     SkPMColorAssert(c);
23     return c;
24 }
25 
roundClamp()26 inline SkPMColor SkPMFloat::roundClamp() const {
27     float a = this->a(),
28           r = this->r(),
29           g = this->g(),
30           b = this->b();
31     a = a < 0 ? 0 : (a > 255 ? 255 : a);
32     r = r < 0 ? 0 : (r > 255 ? 255 : r);
33     g = g < 0 ? 0 : (g > 255 ? 255 : g);
34     b = b < 0 ? 0 : (b > 255 ? 255 : b);
35     SkPMColor c = SkPackARGB32(a+0.5f, r+0.5f, g+0.5f, b+0.5f);
36     SkPMColorAssert(c);
37     return c;
38 }
39 
From4PMColors(const SkPMColor colors[4],SkPMFloat * a,SkPMFloat * b,SkPMFloat * c,SkPMFloat * d)40 inline void SkPMFloat::From4PMColors(const SkPMColor colors[4],
41                                      SkPMFloat* a, SkPMFloat* b, SkPMFloat* c, SkPMFloat* d) {
42     *a = FromPMColor(colors[0]);
43     *b = FromPMColor(colors[1]);
44     *c = FromPMColor(colors[2]);
45     *d = FromPMColor(colors[3]);
46 }
47 
RoundTo4PMColors(const SkPMFloat & a,const SkPMFloat & b,const SkPMFloat & c,const SkPMFloat & d,SkPMColor colors[4])48 inline void SkPMFloat::RoundTo4PMColors(
49         const SkPMFloat& a, const SkPMFloat& b, const SkPMFloat&c, const SkPMFloat& d,
50         SkPMColor colors[4]) {
51     colors[0] = a.round();
52     colors[1] = b.round();
53     colors[2] = c.round();
54     colors[3] = d.round();
55 }
56 
RoundClampTo4PMColors(const SkPMFloat & a,const SkPMFloat & b,const SkPMFloat & c,const SkPMFloat & d,SkPMColor colors[4])57 inline void SkPMFloat::RoundClampTo4PMColors(
58         const SkPMFloat& a, const SkPMFloat& b, const SkPMFloat&c, const SkPMFloat& d,
59         SkPMColor colors[4]) {
60     colors[0] = a.roundClamp();
61     colors[1] = b.roundClamp();
62     colors[2] = c.roundClamp();
63     colors[3] = d.roundClamp();
64 }
65