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| 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 | |
| 3 // found in the LICENSE file. | |
| 4 | |
| 5 #ifndef WEBKIT_RENDERER_COMPOSITOR_BINDINGS_WEB_LAYER_IMPL_FIXED_BOUNDS_H_ | |
| 6 #define WEBKIT_RENDERER_COMPOSITOR_BINDINGS_WEB_LAYER_IMPL_FIXED_BOUNDS_H_ | |
| 7 | |
| 8 #include "ui/gfx/size.h" | |
| 9 #include "ui/gfx/transform.h" | |
| 10 #include "webkit/renderer/compositor_bindings/web_layer_impl.h" | |
| 11 | |
| 12 namespace webkit { | |
| 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 WEBKIT_COMPOSITOR_BINDINGS_EXPORT WebLayerImplFixedBounds(); | |
| 22 WEBKIT_COMPOSITOR_BINDINGS_EXPORT explicit WebLayerImplFixedBounds( | |
| 23 scoped_refptr<cc::Layer>); | |
| 24 virtual ~WebLayerImplFixedBounds(); | |
| 25 | |
| 26 // WebLayerImpl overrides. | |
| 27 virtual void invalidateRect(const blink::WebFloatRect& rect); | |
| 28 virtual void setTransformOrigin( | |
| 29 const blink::WebFloatPoint3D& transform_origin); | |
| 30 virtual void setBounds(const blink::WebSize& bounds); | |
| 31 virtual blink::WebSize bounds() const; | |
| 32 virtual void setTransform(const SkMatrix44& transform); | |
| 33 virtual SkMatrix44 transform() const; | |
| 34 | |
| 35 WEBKIT_COMPOSITOR_BINDINGS_EXPORT void SetFixedBounds(gfx::Size bounds); | |
| 36 | |
| 37 protected: | |
| 38 void SetTransformInternal(const gfx::Transform& transform); | |
| 39 void UpdateLayerBoundsAndTransform(); | |
| 40 | |
| 41 gfx::Transform original_transform_; | |
| 42 gfx::Size original_bounds_; | |
| 43 gfx::Size fixed_bounds_; | |
| 44 | |
| 45 private: | |
| 46 DISALLOW_COPY_AND_ASSIGN(WebLayerImplFixedBounds); | |
| 47 }; | |
| 48 | |
| 49 } // namespace webkit | |
| 50 | |
| 51 #endif // WEBKIT_RENDERER_COMPOSITOR_BINDINGS_WEB_LAYER_IMPL_FIXED_BOUNDS_H_ | |
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