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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_COMPOSITOR_BINDINGS_WEB_LAYER_IMPL_FIXED_BOUNDS_H_ | |
6 #define WEBKIT_COMPOSITOR_BINDINGS_WEB_LAYER_IMPL_FIXED_BOUNDS_H_ | |
7 | |
8 #include "ui/gfx/size.h" | |
9 #include "ui/gfx/transform.h" | |
10 #include "webkit/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 WebKit::WebFloatRect& rect); | |
28 virtual void setAnchorPoint(const WebKit::WebFloatPoint& anchor_point); | |
29 virtual void setBounds(const WebKit::WebSize& bounds); | |
30 virtual WebKit::WebSize bounds() const; | |
31 virtual void setSublayerTransform(const SkMatrix44& transform); | |
32 virtual SkMatrix44 sublayerTransform() const; | |
33 virtual void setTransform(const SkMatrix44& transform); | |
34 virtual SkMatrix44 transform() const; | |
35 | |
36 WEBKIT_COMPOSITOR_BINDINGS_EXPORT void SetFixedBounds(gfx::Size bounds); | |
37 | |
38 protected: | |
39 void SetTransformInternal(const gfx::Transform& transform); | |
40 void SetSublayerTransformInternal(const gfx::Transform& transform); | |
41 void UpdateLayerBoundsAndTransform(); | |
42 | |
43 gfx::Transform original_sublayer_transform_; | |
44 gfx::Transform original_transform_; | |
45 gfx::Size original_bounds_; | |
46 gfx::Size fixed_bounds_; | |
47 | |
48 private: | |
49 DISALLOW_COPY_AND_ASSIGN(WebLayerImplFixedBounds); | |
50 }; | |
51 | |
52 } // namespace webkit | |
53 | |
54 #endif // WEBKIT_COMPOSITOR_BINDINGS_WEB_LAYER_IMPL_FIXED_BOUNDS_H_ | |
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