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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 | |
3 // found in the LICENSE file. | |
4 | |
5 #include "config.h" | |
6 | |
7 #include "CCKeyframedAnimationCurve.h" | |
8 | |
9 using WebKit::WebTransformationMatrix; | |
10 | |
11 namespace cc { | |
12 | |
13 namespace { | |
14 | |
15 template <class Keyframe> | |
16 void insertKeyframe(scoped_ptr<Keyframe> keyframe, ScopedPtrVector<Keyframe>& ke
yframes) | |
17 { | |
18 // Usually, the keyframes will be added in order, so this loop would be unne
cessary and | |
19 // we should skip it if possible. | |
20 if (!keyframes.isEmpty() && keyframe->time() < keyframes.last()->time()) { | |
21 for (size_t i = 0; i < keyframes.size(); ++i) { | |
22 if (keyframe->time() < keyframes[i]->time()) { | |
23 keyframes.insert(i, keyframe.Pass()); | |
24 return; | |
25 } | |
26 } | |
27 } | |
28 | |
29 keyframes.append(keyframe.Pass()); | |
30 } | |
31 | |
32 scoped_ptr<CCTimingFunction> cloneTimingFunction(const CCTimingFunction* timingF
unction) | |
33 { | |
34 ASSERT(timingFunction); | |
35 scoped_ptr<CCAnimationCurve> curve(timingFunction->clone()); | |
36 return scoped_ptr<CCTimingFunction>(static_cast<CCTimingFunction*>(curve.rel
ease())); | |
37 } | |
38 | |
39 } // namespace | |
40 | |
41 CCKeyframe::CCKeyframe(double time, scoped_ptr<CCTimingFunction> timingFunction) | |
42 : m_time(time) | |
43 , m_timingFunction(timingFunction.Pass()) | |
44 { | |
45 } | |
46 | |
47 CCKeyframe::~CCKeyframe() | |
48 { | |
49 } | |
50 | |
51 double CCKeyframe::time() const | |
52 { | |
53 return m_time; | |
54 } | |
55 | |
56 const CCTimingFunction* CCKeyframe::timingFunction() const | |
57 { | |
58 return m_timingFunction.get(); | |
59 } | |
60 | |
61 scoped_ptr<CCFloatKeyframe> CCFloatKeyframe::create(double time, float value, sc
oped_ptr<CCTimingFunction> timingFunction) | |
62 { | |
63 return make_scoped_ptr(new CCFloatKeyframe(time, value, timingFunction.Pass(
))); | |
64 } | |
65 | |
66 CCFloatKeyframe::CCFloatKeyframe(double time, float value, scoped_ptr<CCTimingFu
nction> timingFunction) | |
67 : CCKeyframe(time, timingFunction.Pass()) | |
68 , m_value(value) | |
69 { | |
70 } | |
71 | |
72 CCFloatKeyframe::~CCFloatKeyframe() | |
73 { | |
74 } | |
75 | |
76 float CCFloatKeyframe::value() const | |
77 { | |
78 return m_value; | |
79 } | |
80 | |
81 scoped_ptr<CCFloatKeyframe> CCFloatKeyframe::clone() const | |
82 { | |
83 scoped_ptr<CCTimingFunction> func; | |
84 if (timingFunction()) | |
85 func = cloneTimingFunction(timingFunction()); | |
86 return CCFloatKeyframe::create(time(), value(), func.Pass()); | |
87 } | |
88 | |
89 scoped_ptr<CCTransformKeyframe> CCTransformKeyframe::create(double time, const W
ebKit::WebTransformOperations& value, scoped_ptr<CCTimingFunction> timingFunctio
n) | |
90 { | |
91 return make_scoped_ptr(new CCTransformKeyframe(time, value, timingFunction.P
ass())); | |
92 } | |
93 | |
94 CCTransformKeyframe::CCTransformKeyframe(double time, const WebKit::WebTransform
Operations& value, scoped_ptr<CCTimingFunction> timingFunction) | |
95 : CCKeyframe(time, timingFunction.Pass()) | |
96 , m_value(value) | |
97 { | |
98 } | |
99 | |
100 CCTransformKeyframe::~CCTransformKeyframe() | |
101 { | |
102 } | |
103 | |
104 const WebKit::WebTransformOperations& CCTransformKeyframe::value() const | |
105 { | |
106 return m_value; | |
107 } | |
108 | |
109 scoped_ptr<CCTransformKeyframe> CCTransformKeyframe::clone() const | |
110 { | |
111 scoped_ptr<CCTimingFunction> func; | |
112 if (timingFunction()) | |
113 func = cloneTimingFunction(timingFunction()); | |
114 return CCTransformKeyframe::create(time(), value(), func.Pass()); | |
115 } | |
116 | |
117 scoped_ptr<CCKeyframedFloatAnimationCurve> CCKeyframedFloatAnimationCurve::creat
e() | |
118 { | |
119 return make_scoped_ptr(new CCKeyframedFloatAnimationCurve); | |
120 } | |
121 | |
122 CCKeyframedFloatAnimationCurve::CCKeyframedFloatAnimationCurve() | |
123 { | |
124 } | |
125 | |
126 CCKeyframedFloatAnimationCurve::~CCKeyframedFloatAnimationCurve() | |
127 { | |
128 } | |
129 | |
130 void CCKeyframedFloatAnimationCurve::addKeyframe(scoped_ptr<CCFloatKeyframe> key
frame) | |
131 { | |
132 insertKeyframe(keyframe.Pass(), m_keyframes); | |
133 } | |
134 | |
135 double CCKeyframedFloatAnimationCurve::duration() const | |
136 { | |
137 return m_keyframes.last()->time() - m_keyframes.first()->time(); | |
138 } | |
139 | |
140 scoped_ptr<CCAnimationCurve> CCKeyframedFloatAnimationCurve::clone() const | |
141 { | |
142 scoped_ptr<CCKeyframedFloatAnimationCurve> toReturn(CCKeyframedFloatAnimatio
nCurve::create()); | |
143 for (size_t i = 0; i < m_keyframes.size(); ++i) | |
144 toReturn->addKeyframe(m_keyframes[i]->clone()); | |
145 return toReturn.PassAs<CCAnimationCurve>(); | |
146 } | |
147 | |
148 float CCKeyframedFloatAnimationCurve::getValue(double t) const | |
149 { | |
150 if (t <= m_keyframes.first()->time()) | |
151 return m_keyframes.first()->value(); | |
152 | |
153 if (t >= m_keyframes.last()->time()) | |
154 return m_keyframes.last()->value(); | |
155 | |
156 size_t i = 0; | |
157 for (; i < m_keyframes.size() - 1; ++i) { | |
158 if (t < m_keyframes[i+1]->time()) | |
159 break; | |
160 } | |
161 | |
162 float progress = static_cast<float>((t - m_keyframes[i]->time()) / (m_keyfra
mes[i+1]->time() - m_keyframes[i]->time())); | |
163 | |
164 if (m_keyframes[i]->timingFunction()) | |
165 progress = m_keyframes[i]->timingFunction()->getValue(progress); | |
166 | |
167 return m_keyframes[i]->value() + (m_keyframes[i+1]->value() - m_keyframes[i]
->value()) * progress; | |
168 } | |
169 | |
170 scoped_ptr<CCKeyframedTransformAnimationCurve> CCKeyframedTransformAnimationCurv
e::create() | |
171 { | |
172 return make_scoped_ptr(new CCKeyframedTransformAnimationCurve); | |
173 } | |
174 | |
175 CCKeyframedTransformAnimationCurve::CCKeyframedTransformAnimationCurve() | |
176 { | |
177 } | |
178 | |
179 CCKeyframedTransformAnimationCurve::~CCKeyframedTransformAnimationCurve() | |
180 { | |
181 } | |
182 | |
183 void CCKeyframedTransformAnimationCurve::addKeyframe(scoped_ptr<CCTransformKeyfr
ame> keyframe) | |
184 { | |
185 insertKeyframe(keyframe.Pass(), m_keyframes); | |
186 } | |
187 | |
188 double CCKeyframedTransformAnimationCurve::duration() const | |
189 { | |
190 return m_keyframes.last()->time() - m_keyframes.first()->time(); | |
191 } | |
192 | |
193 scoped_ptr<CCAnimationCurve> CCKeyframedTransformAnimationCurve::clone() const | |
194 { | |
195 scoped_ptr<CCKeyframedTransformAnimationCurve> toReturn(CCKeyframedTransform
AnimationCurve::create()); | |
196 for (size_t i = 0; i < m_keyframes.size(); ++i) | |
197 toReturn->addKeyframe(m_keyframes[i]->clone()); | |
198 return toReturn.PassAs<CCAnimationCurve>(); | |
199 } | |
200 | |
201 WebTransformationMatrix CCKeyframedTransformAnimationCurve::getValue(double t) c
onst | |
202 { | |
203 if (t <= m_keyframes.first()->time()) | |
204 return m_keyframes.first()->value().apply(); | |
205 | |
206 if (t >= m_keyframes.last()->time()) | |
207 return m_keyframes.last()->value().apply(); | |
208 | |
209 size_t i = 0; | |
210 for (; i < m_keyframes.size() - 1; ++i) { | |
211 if (t < m_keyframes[i+1]->time()) | |
212 break; | |
213 } | |
214 | |
215 double progress = (t - m_keyframes[i]->time()) / (m_keyframes[i+1]->time() -
m_keyframes[i]->time()); | |
216 | |
217 if (m_keyframes[i]->timingFunction()) | |
218 progress = m_keyframes[i]->timingFunction()->getValue(progress); | |
219 | |
220 return m_keyframes[i+1]->value().blend(m_keyframes[i]->value(), progress); | |
221 } | |
222 | |
223 } // namespace cc | |
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