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comparison: gfx/skia/trunk/include/utils/SkLayer.h
gfx/skia/trunk/include/utils/SkLayer.h
- branch
- TOR_BUG_3246
- changeset 7
- 129ffea94266
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| -1:000000000000 | 0:19181ec64202 |
|---|---|
| 1 | |
| 2 /* | |
| 3 * Copyright 2010 The Android Open Source Project | |
| 4 * | |
| 5 * Use of this source code is governed by a BSD-style license that can be | |
| 6 * found in the LICENSE file. | |
| 7 */ | |
| 8 | |
| 9 | |
| 10 #ifndef SkLayer_DEFINED | |
| 11 #define SkLayer_DEFINED | |
| 12 | |
| 13 #include "SkRefCnt.h" | |
| 14 #include "SkTDArray.h" | |
| 15 #include "SkColor.h" | |
| 16 #include "SkMatrix.h" | |
| 17 #include "SkPoint.h" | |
| 18 #include "SkRect.h" | |
| 19 #include "SkSize.h" | |
| 20 | |
| 21 class SkCanvas; | |
| 22 | |
| 23 class SkLayer : public SkRefCnt { | |
| 24 | |
| 25 public: | |
| 26 SK_DECLARE_INST_COUNT(SkLayer) | |
| 27 | |
| 28 SkLayer(); | |
| 29 SkLayer(const SkLayer&); | |
| 30 virtual ~SkLayer(); | |
| 31 | |
| 32 bool isInheritFromRootTransform() const; | |
| 33 SkScalar getOpacity() const { return m_opacity; } | |
| 34 const SkSize& getSize() const { return m_size; } | |
| 35 const SkPoint& getPosition() const { return m_position; } | |
| 36 const SkPoint& getAnchorPoint() const { return m_anchorPoint; } | |
| 37 const SkMatrix& getMatrix() const { return fMatrix; } | |
| 38 const SkMatrix& getChildrenMatrix() const { return fChildrenMatrix; } | |
| 39 | |
| 40 SkScalar getWidth() const { return m_size.width(); } | |
| 41 SkScalar getHeight() const { return m_size.height(); } | |
| 42 | |
| 43 void setInheritFromRootTransform(bool); | |
| 44 void setOpacity(SkScalar opacity) { m_opacity = opacity; } | |
| 45 void setSize(SkScalar w, SkScalar h) { m_size.set(w, h); } | |
| 46 void setPosition(SkScalar x, SkScalar y) { m_position.set(x, y); } | |
| 47 void setAnchorPoint(SkScalar x, SkScalar y) { m_anchorPoint.set(x, y); } | |
| 48 void setMatrix(const SkMatrix&); | |
| 49 void setChildrenMatrix(const SkMatrix&); | |
| 50 | |
| 51 // children | |
| 52 | |
| 53 /** Return the number of layers in our child list. | |
| 54 */ | |
| 55 int countChildren() const; | |
| 56 | |
| 57 /** Return the child at the specified index (starting at 0). This does not | |
| 58 affect the reference count of the child. | |
| 59 */ | |
| 60 SkLayer* getChild(int index) const; | |
| 61 | |
| 62 /** Add this layer to our child list at the end (top-most), and ref() it. | |
| 63 If it was already in another hierarchy, remove it from that list. | |
| 64 Return the new child. | |
| 65 */ | |
| 66 SkLayer* addChild(SkLayer* child); | |
| 67 | |
| 68 /** Remove this layer from its parent's list (or do nothing if it has no | |
| 69 parent.) If it had a parent, then unref() is called. | |
| 70 */ | |
| 71 void detachFromParent(); | |
| 72 | |
| 73 /** Remove, and unref(), all of the layers in our child list. | |
| 74 */ | |
| 75 void removeChildren(); | |
| 76 | |
| 77 /** Return our parent layer, or NULL if we have none. | |
| 78 */ | |
| 79 SkLayer* getParent() const { return fParent; } | |
| 80 | |
| 81 /** Return the root layer in this hiearchy. If this layer is the root | |
| 82 (i.e. has no parent), then this returns itself. | |
| 83 */ | |
| 84 SkLayer* getRootLayer() const; | |
| 85 | |
| 86 // coordinate system transformations | |
| 87 | |
| 88 /** Return, in matrix, the matix transfomations that are applied locally | |
| 89 when this layer draws (i.e. its position and matrix/anchorPoint). | |
| 90 This does not include the childrenMatrix, since that is only applied | |
| 91 after this layer draws (but before its children draw). | |
| 92 */ | |
| 93 void getLocalTransform(SkMatrix* matrix) const; | |
| 94 | |
| 95 /** Return, in matrix, the concatenation of transforms that are applied | |
| 96 from this layer's root parent to the layer itself. | |
| 97 This is the matrix that is applied to the layer during drawing. | |
| 98 */ | |
| 99 void localToGlobal(SkMatrix* matrix) const; | |
| 100 | |
| 101 // paint method | |
| 102 | |
| 103 void draw(SkCanvas*, SkScalar opacity); | |
| 104 void draw(SkCanvas* canvas) { | |
| 105 this->draw(canvas, SK_Scalar1); | |
| 106 } | |
| 107 | |
| 108 protected: | |
| 109 virtual void onDraw(SkCanvas*, SkScalar opacity); | |
| 110 | |
| 111 private: | |
| 112 enum Flags { | |
| 113 kInheritFromRootTransform_Flag = 0x01 | |
| 114 }; | |
| 115 | |
| 116 SkLayer* fParent; | |
| 117 SkScalar m_opacity; | |
| 118 SkSize m_size; | |
| 119 SkPoint m_position; | |
| 120 SkPoint m_anchorPoint; | |
| 121 SkMatrix fMatrix; | |
| 122 SkMatrix fChildrenMatrix; | |
| 123 uint32_t fFlags; | |
| 124 | |
| 125 SkTDArray<SkLayer*> m_children; | |
| 126 | |
| 127 typedef SkRefCnt INHERITED; | |
| 128 }; | |
| 129 | |
| 130 #endif |
