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.
5 #ifndef WEBKIT_RENDERER_COMPOSITOR_BINDINGS_WEB_LAYER_IMPL_FIXED_BOUNDS_H_
6 #define WEBKIT_RENDERER_COMPOSITOR_BINDINGS_WEB_LAYER_IMPL_FIXED_BOUNDS_H_
8 #include "ui/gfx/size.h"
9 #include "ui/gfx/transform.h"
10 #include "webkit/renderer/compositor_bindings/web_layer_impl.h"
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 {
21 WEBKIT_COMPOSITOR_BINDINGS_EXPORT WebLayerImplFixedBounds();
22 WEBKIT_COMPOSITOR_BINDINGS_EXPORT explicit WebLayerImplFixedBounds(
23 scoped_refptr<cc::Layer>);
24 virtual ~WebLayerImplFixedBounds();
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;
36 WEBKIT_COMPOSITOR_BINDINGS_EXPORT void SetFixedBounds(gfx::Size bounds);
39 void SetTransformInternal(const gfx::Transform& transform);
40 void SetSublayerTransformInternal(const gfx::Transform& transform);
41 void UpdateLayerBoundsAndTransform();
43 gfx::Transform original_sublayer_transform_;
44 gfx::Transform original_transform_;
45 gfx::Size original_bounds_;
46 gfx::Size fixed_bounds_;
49 DISALLOW_COPY_AND_ASSIGN(WebLayerImplFixedBounds);
54 #endif // WEBKIT_RENDERER_COMPOSITOR_BINDINGS_WEB_LAYER_IMPL_FIXED_BOUNDS_H_