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1 /* | 1 /* |
2 * Copyright (C) 2011 Apple Inc. All rights reserved. | 2 * Copyright (C) 2011 Apple Inc. All rights reserved. |
3 * | 3 * |
4 * Redistribution and use in source and binary forms, with or without | 4 * Redistribution and use in source and binary forms, with or without |
5 * modification, are permitted provided that the following conditions | 5 * modification, are permitted provided that the following conditions |
6 * are met: | 6 * are met: |
7 * 1. Redistributions of source code must retain the above copyright | 7 * 1. Redistributions of source code must retain the above copyright |
8 * notice, this list of conditions and the following disclaimer. | 8 * notice, this list of conditions and the following disclaimer. |
9 * 2. Redistributions in binary form must reproduce the above copyright | 9 * 2. Redistributions in binary form must reproduce the above copyright |
10 * notice, this list of conditions and the following disclaimer in the | 10 * notice, this list of conditions and the following disclaimer in the |
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37 | 37 |
38 inline int blend(int from, int to, double progress) | 38 inline int blend(int from, int to, double progress) |
39 { | 39 { |
40 return lround(from + (to - from) * progress); | 40 return lround(from + (to - from) * progress); |
41 } | 41 } |
42 | 42 |
43 // For unsigned types. | 43 // For unsigned types. |
44 template <typename T> | 44 template <typename T> |
45 inline T blend(T from, T to, double progress) | 45 inline T blend(T from, T to, double progress) |
46 { | 46 { |
47 COMPILE_ASSERT(WTF::IsInteger<T>::value, BlendForUnsignedTypes); | 47 static_assert(WTF::IsInteger<T>::value, "blend can only be used with integer
types"); |
48 return clampTo<T>(round(to > from ? from + (to - from) * progress : from - (
from - to) * progress)); | 48 return clampTo<T>(round(to > from ? from + (to - from) * progress : from - (
from - to) * progress)); |
49 } | 49 } |
50 | 50 |
51 inline double blend(double from, double to, double progress) | 51 inline double blend(double from, double to, double progress) |
52 { | 52 { |
53 return from + (to - from) * progress; | 53 return from + (to - from) * progress; |
54 } | 54 } |
55 | 55 |
56 inline float blend(float from, float to, double progress) | 56 inline float blend(float from, float to, double progress) |
57 { | 57 { |
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75 | 75 |
76 // Calculates the accuracy for evaluating a timing function for an animation wit
h the specified duration. | 76 // Calculates the accuracy for evaluating a timing function for an animation wit
h the specified duration. |
77 inline double accuracyForDuration(double duration) | 77 inline double accuracyForDuration(double duration) |
78 { | 78 { |
79 return 1.0 / (200.0 * duration); | 79 return 1.0 / (200.0 * duration); |
80 } | 80 } |
81 | 81 |
82 } // namespace blink | 82 } // namespace blink |
83 | 83 |
84 #endif // AnimationUtilities_h | 84 #endif // AnimationUtilities_h |
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