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1 // Copyright 2012 The Chromium Authors. All rights reserved. | 1 // Copyright 2012 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #include "base/logging.h" | 5 #include "base/logging.h" |
6 #include "base/memory/scoped_ptr.h" | 6 #include "base/memory/scoped_ptr.h" |
7 #include "cc/animation/timing_function.h" | 7 #include "cc/animation/timing_function.h" |
8 #include "cc/base/math_util.h" | |
8 | 9 |
9 namespace cc { | 10 namespace cc { |
10 | 11 |
11 TimingFunction::TimingFunction() {} | 12 TimingFunction::TimingFunction() {} |
12 | 13 |
13 TimingFunction::~TimingFunction() {} | 14 TimingFunction::~TimingFunction() {} |
14 | 15 |
15 scoped_ptr<CubicBezierTimingFunction> CubicBezierTimingFunction::Create( | 16 scoped_ptr<CubicBezierTimingFunction> CubicBezierTimingFunction::Create( |
16 double x1, double y1, double x2, double y2) { | 17 double x1, double y1, double x2, double y2) { |
17 return make_scoped_ptr(new CubicBezierTimingFunction(x1, y1, x2, y2)); | 18 return make_scoped_ptr(new CubicBezierTimingFunction(x1, y1, x2, y2)); |
(...skipping 38 matching lines...) Expand 10 before | Expand all | Expand 10 after Loading... | |
56 } | 57 } |
57 | 58 |
58 scoped_ptr<TimingFunction> EaseOutTimingFunction::Create() { | 59 scoped_ptr<TimingFunction> EaseOutTimingFunction::Create() { |
59 return CubicBezierTimingFunction::Create(0.0, 0.0, 0.58, 1.0); | 60 return CubicBezierTimingFunction::Create(0.0, 0.0, 0.58, 1.0); |
60 } | 61 } |
61 | 62 |
62 scoped_ptr<TimingFunction> EaseInOutTimingFunction::Create() { | 63 scoped_ptr<TimingFunction> EaseInOutTimingFunction::Create() { |
63 return CubicBezierTimingFunction::Create(0.42, 0.0, 0.58, 1); | 64 return CubicBezierTimingFunction::Create(0.42, 0.0, 0.58, 1); |
64 } | 65 } |
65 | 66 |
67 scoped_ptr<StepsTimingFunction> StepsTimingFunction::Create( | |
68 int steps, | |
69 float steps_start_offset) { | |
70 return make_scoped_ptr(new StepsTimingFunction(steps, steps_start_offset)); | |
71 } | |
72 | |
73 StepsTimingFunction::StepsTimingFunction(int steps, float steps_start_offset) | |
74 : steps_(steps), steps_start_offset_(steps_start_offset) { | |
75 // Restrict it to css presets: step_start, step_end and step_middle. | |
76 DCHECK(steps_start_offset_ == 0 || steps_start_offset_ == 1 || | |
77 steps_start_offset_ == 0.5); | |
ajuma
2014/12/17 16:32:56
If we're restricting to these values, let's use th
loyso (OOO)
2014/12/18 01:53:05
My initial implementation was absolutely like that
ajuma
2014/12/18 02:15:41
Ok.
| |
78 } | |
79 | |
80 StepsTimingFunction::~StepsTimingFunction() { | |
81 } | |
82 | |
83 float StepsTimingFunction::GetValue(double t) const { | |
84 return MathUtil::ClampToRange( | |
85 floor((steps_ * t) + steps_start_offset_) / steps_, 0.0, 1.0); | |
ajuma
2014/12/17 16:32:56
static_cast<double>(steps_) (rather than having an
loyso (OOO)
2014/12/18 01:53:05
There is a bunch of implicit conversions. steps_ i
ajuma
2014/12/18 02:15:41
Yes, please make them explicit. The style guide ta
loyso (OOO)
2014/12/18 03:17:30
That link says nothing on implicit vs. explicit co
ajuma
2014/12/18 14:32:54
It's a (relatively) common practice in cc. It make
| |
86 } | |
87 | |
88 scoped_ptr<TimingFunction> StepsTimingFunction::Clone() const { | |
89 return make_scoped_ptr(new StepsTimingFunction(*this)); | |
90 } | |
91 | |
92 void StepsTimingFunction::Range(float* min, float* max) const { | |
93 *min = 0.0f; | |
94 *max = 1.0f; | |
95 } | |
96 | |
97 float StepsTimingFunction::Velocity(double x) const { | |
98 return 0.0f; | |
99 } | |
100 | |
66 } // namespace cc | 101 } // namespace cc |
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