blob: edfd4bbb5588c16fc240ff375bea40bfd06a0468 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
|
// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CC_BLINK_WEB_LAYER_IMPL_FIXED_BOUNDS_H_
#define CC_BLINK_WEB_LAYER_IMPL_FIXED_BOUNDS_H_
#include "cc/blink/web_layer_impl.h"
#include "ui/gfx/geometry/size.h"
#include "ui/gfx/transform.h"
namespace cc_blink {
// A special implementation of WebLayerImpl for layers that its contents
// need to be automatically scaled when the bounds changes. The compositor
// can efficiently handle the bounds change of such layers if the bounds
// is fixed to a given value and the change of bounds are converted to
// transformation scales.
class WebLayerImplFixedBounds : public WebLayerImpl {
public:
CC_BLINK_EXPORT WebLayerImplFixedBounds();
CC_BLINK_EXPORT explicit WebLayerImplFixedBounds(
scoped_refptr<cc::Layer> layer);
virtual ~WebLayerImplFixedBounds();
// WebLayerImpl overrides.
void invalidateRect(const blink::WebRect& rect) override;
void setTransformOrigin(
const blink::WebFloatPoint3D& transform_origin) override;
void setBounds(const blink::WebSize& bounds) override;
blink::WebSize bounds() const override;
void setTransform(const SkMatrix44& transform) override;
SkMatrix44 transform() const override;
CC_BLINK_EXPORT void SetFixedBounds(gfx::Size bounds);
protected:
void SetTransformInternal(const gfx::Transform& transform);
void UpdateLayerBoundsAndTransform();
gfx::Transform original_transform_;
gfx::Size original_bounds_;
gfx::Size fixed_bounds_;
private:
DISALLOW_COPY_AND_ASSIGN(WebLayerImplFixedBounds);
};
} // namespace cc_blink
#endif // CC_BLINK_WEB_LAYER_IMPL_FIXED_BOUNDS_H_
|
