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| 1 // Copyright 2014 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 #ifndef SKY_VIEWER_CC_WEB_LAYER_IMPL_FIXED_BOUNDS_H_ | |
| 6 #define SKY_VIEWER_CC_WEB_LAYER_IMPL_FIXED_BOUNDS_H_ | |
| 7 | |
| 8 #include "sky/viewer/cc/web_layer_impl.h" | |
| 9 #include "ui/gfx/size.h" | |
| 10 #include "ui/gfx/transform.h" | |
| 11 | |
| 12 namespace sky_viewer_cc { | |
| 13 | |
| 14 // A special implementation of WebLayerImpl for layers that its contents | |
| 15 // need to be automatically scaled when the bounds changes. The compositor | |
| 16 // can efficiently handle the bounds change of such layers if the bounds | |
| 17 // is fixed to a given value and the change of bounds are converted to | |
| 18 // transformation scales. | |
| 19 class WebLayerImplFixedBounds : public WebLayerImpl { | |
| 20 public: | |
| 21 SKY_VIEWER_CC_EXPORT WebLayerImplFixedBounds(); | |
| 22 SKY_VIEWER_CC_EXPORT explicit WebLayerImplFixedBounds(scoped_refptr<cc::Layer>
); | |
| 23 virtual ~WebLayerImplFixedBounds(); | |
| 24 | |
| 25 // WebLayerImpl overrides. | |
| 26 virtual void invalidateRect(const blink::WebFloatRect& rect); | |
| 27 virtual void setTransformOrigin( | |
| 28 const blink::WebFloatPoint3D& transform_origin); | |
| 29 virtual void setBounds(const blink::WebSize& bounds); | |
| 30 virtual blink::WebSize bounds() const; | |
| 31 virtual void setTransform(const SkMatrix44& transform); | |
| 32 virtual SkMatrix44 transform() const; | |
| 33 | |
| 34 SKY_VIEWER_CC_EXPORT void SetFixedBounds(gfx::Size bounds); | |
| 35 | |
| 36 protected: | |
| 37 void SetTransformInternal(const gfx::Transform& transform); | |
| 38 void UpdateLayerBoundsAndTransform(); | |
| 39 | |
| 40 gfx::Transform original_transform_; | |
| 41 gfx::Size original_bounds_; | |
| 42 gfx::Size fixed_bounds_; | |
| 43 | |
| 44 private: | |
| 45 DISALLOW_COPY_AND_ASSIGN(WebLayerImplFixedBounds); | |
| 46 }; | |
| 47 | |
| 48 } // namespace sky_viewer_cc | |
| 49 | |
| 50 #endif // SKY_VIEWER_CC_WEB_LAYER_IMPL_FIXED_BOUNDS_H_ | |
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