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
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
|
/*
* Copyright (C) 2010 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef SkLayer_DEFINED
#define SkLayer_DEFINED
#include "SkRefCnt.h"
#include "SkTDArray.h"
#include "SkColor.h"
#include "SkMatrix.h"
#include "SkPoint.h"
#include "SkRect.h"
#include "SkSize.h"
class SkCanvas;
class SkLayer : public SkRefCnt {
public:
SkLayer();
SkLayer(const SkLayer&);
virtual ~SkLayer();
bool isInheritFromRootTransform() const;
SkScalar getOpacity() const { return m_opacity; }
const SkSize& getSize() const { return m_size; }
const SkPoint& getPosition() const { return m_position; }
const SkPoint& getAnchorPoint() const { return m_anchorPoint; }
const SkMatrix& getMatrix() const { return fMatrix; }
const SkMatrix& getChildrenMatrix() const { return fChildrenMatrix; }
SkScalar getWidth() const { return m_size.width(); }
SkScalar getHeight() const { return m_size.height(); }
void setInheritFromRootTransform(bool);
void setOpacity(SkScalar opacity) { m_opacity = opacity; }
void setSize(SkScalar w, SkScalar h) { m_size.set(w, h); }
void setPosition(SkScalar x, SkScalar y) { m_position.set(x, y); }
void setAnchorPoint(SkScalar x, SkScalar y) { m_anchorPoint.set(x, y); }
void setMatrix(const SkMatrix&);
void setChildrenMatrix(const SkMatrix&);
// children
/** Return the number of layers in our child list.
*/
int countChildren() const;
/** Return the child at the specified index (starting at 0). This does not
affect the reference count of the child.
*/
SkLayer* getChild(int index) const;
/** Add this layer to our child list at the end (top-most), and ref() it.
If it was already in another hierarchy, remove it from that list.
Return the new child.
*/
SkLayer* addChild(SkLayer* child);
/** Remove this layer from its parent's list (or do nothing if it has no
parent.) If it had a parent, then unref() is called.
*/
void detachFromParent();
/** Remove, and unref(), all of the layers in our child list.
*/
void removeChildren();
/** Return our parent layer, or NULL if we have none.
*/
SkLayer* getParent() const { return fParent; }
/** Return the root layer in this hiearchy. If this layer is the root
(i.e. has no parent), then this returns itself.
*/
SkLayer* getRootLayer() const;
// coordinate system transformations
/** Return, in matrix, the matix transfomations that are applied locally
when this layer draws (i.e. its position and matrix/anchorPoint).
This does not include the childrenMatrix, since that is only applied
after this layer draws (but before its children draw).
*/
void getLocalTransform(SkMatrix* matrix) const;
/** Return, in matrix, the concatenation of transforms that are applied
from this layer's root parent to the layer itself.
This is the matrix that is applied to the layer during drawing.
*/
void localToGlobal(SkMatrix* matrix) const;
// paint method
void draw(SkCanvas*, SkScalar opacity);
void draw(SkCanvas* canvas) {
this->draw(canvas, SK_Scalar1);
}
protected:
virtual void onDraw(SkCanvas*, SkScalar opacity);
private:
enum Flags {
kInheritFromRootTransform_Flag = 0x01
};
SkLayer* fParent;
SkScalar m_opacity;
SkSize m_size;
SkPoint m_position;
SkPoint m_anchorPoint;
SkMatrix fMatrix;
SkMatrix fChildrenMatrix;
uint32_t fFlags;
SkTDArray<SkLayer*> m_children;
typedef SkRefCnt INHERITED;
};
#endif
|
