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 CC_BLINK_WEB_LAYER_IMPL_FIXED_BOUNDS_H_ 6 #define CC_BLINK_WEB_LAYER_IMPL_FIXED_BOUNDS_H_ 7 8 #include "cc/blink/web_layer_impl.h" 9 #include "ui/gfx/size.h" 10 #include "ui/gfx/transform.h" 11 12 namespace cc_blink { 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 CC_BLINK_EXPORT WebLayerImplFixedBounds(); 22 CC_BLINK_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 CC_BLINK_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 cc_blink 49 50 #endif // CC_BLINK_WEB_LAYER_IMPL_FIXED_BOUNDS_H_ 51
