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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 CONTENT_RENDERER_COMPOSITOR_BINDINGS_WEB_LAYER_IMPL_FIXED_BOUNDS_H_ | |
6 #define CONTENT_RENDERER_COMPOSITOR_BINDINGS_WEB_LAYER_IMPL_FIXED_BOUNDS_H_ | |
7 | |
8 #include "content/renderer/compositor_bindings/web_layer_impl.h" | |
9 #include "ui/gfx/size.h" | |
10 #include "ui/gfx/transform.h" | |
11 | |
12 namespace content { | |
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 CONTENT_EXPORT WebLayerImplFixedBounds(); | |
22 CONTENT_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 CONTENT_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 content | |
50 | |
51 #endif // CONTENT_RENDERER_COMPOSITOR_BINDINGS_WEB_LAYER_IMPL_FIXED_BOUNDS_H_ | |
52 | |
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