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1 // Copyright 2013 The Chromium Authors. All rights reserved. | 1 // Copyright 2013 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 #ifndef CC_ANIMATION_LAYER_ANIMATION_VALUE_PROVIDER_H_ | 5 #ifndef CC_ANIMATION_LAYER_ANIMATION_VALUE_PROVIDER_H_ |
6 #define CC_ANIMATION_LAYER_ANIMATION_VALUE_PROVIDER_H_ | 6 #define CC_ANIMATION_LAYER_ANIMATION_VALUE_PROVIDER_H_ |
7 | 7 |
8 #include "cc/base/cc_export.h" | 8 #include "cc/base/cc_export.h" |
9 #include "ui/gfx/vector2d_f.h" | |
10 | 9 |
11 namespace cc { | 10 namespace cc { |
12 | 11 |
| 12 class ScrollOffset; |
| 13 |
13 // A LayerAnimationValueProvider is used for determining the starting value | 14 // A LayerAnimationValueProvider is used for determining the starting value |
14 // for animations that start at their 'current' value rather than at a | 15 // for animations that start at their 'current' value rather than at a |
15 // pre-specified value. | 16 // pre-specified value. |
16 class CC_EXPORT LayerAnimationValueProvider { | 17 class CC_EXPORT LayerAnimationValueProvider { |
17 public: | 18 public: |
18 virtual ~LayerAnimationValueProvider() {} | 19 virtual ~LayerAnimationValueProvider() {} |
19 | 20 |
20 virtual gfx::Vector2dF ScrollOffsetForAnimation() const = 0; | 21 virtual gfx::ScrollOffset ScrollOffsetForAnimation() const = 0; |
21 }; | 22 }; |
22 | 23 |
23 } // namespace cc | 24 } // namespace cc |
24 | 25 |
25 #endif // CC_ANIMATION_LAYER_ANIMATION_VALUE_PROVIDER_H_ | 26 #endif // CC_ANIMATION_LAYER_ANIMATION_VALUE_PROVIDER_H_ |
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