1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/gfx/skia/trunk/include/utils/SkLayer.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,130 @@
1.4 +
1.5 +/*
1.6 + * Copyright 2010 The Android Open Source Project
1.7 + *
1.8 + * Use of this source code is governed by a BSD-style license that can be
1.9 + * found in the LICENSE file.
1.10 + */
1.11 +
1.12 +
1.13 +#ifndef SkLayer_DEFINED
1.14 +#define SkLayer_DEFINED
1.15 +
1.16 +#include "SkRefCnt.h"
1.17 +#include "SkTDArray.h"
1.18 +#include "SkColor.h"
1.19 +#include "SkMatrix.h"
1.20 +#include "SkPoint.h"
1.21 +#include "SkRect.h"
1.22 +#include "SkSize.h"
1.23 +
1.24 +class SkCanvas;
1.25 +
1.26 +class SkLayer : public SkRefCnt {
1.27 +
1.28 +public:
1.29 + SK_DECLARE_INST_COUNT(SkLayer)
1.30 +
1.31 + SkLayer();
1.32 + SkLayer(const SkLayer&);
1.33 + virtual ~SkLayer();
1.34 +
1.35 + bool isInheritFromRootTransform() const;
1.36 + SkScalar getOpacity() const { return m_opacity; }
1.37 + const SkSize& getSize() const { return m_size; }
1.38 + const SkPoint& getPosition() const { return m_position; }
1.39 + const SkPoint& getAnchorPoint() const { return m_anchorPoint; }
1.40 + const SkMatrix& getMatrix() const { return fMatrix; }
1.41 + const SkMatrix& getChildrenMatrix() const { return fChildrenMatrix; }
1.42 +
1.43 + SkScalar getWidth() const { return m_size.width(); }
1.44 + SkScalar getHeight() const { return m_size.height(); }
1.45 +
1.46 + void setInheritFromRootTransform(bool);
1.47 + void setOpacity(SkScalar opacity) { m_opacity = opacity; }
1.48 + void setSize(SkScalar w, SkScalar h) { m_size.set(w, h); }
1.49 + void setPosition(SkScalar x, SkScalar y) { m_position.set(x, y); }
1.50 + void setAnchorPoint(SkScalar x, SkScalar y) { m_anchorPoint.set(x, y); }
1.51 + void setMatrix(const SkMatrix&);
1.52 + void setChildrenMatrix(const SkMatrix&);
1.53 +
1.54 + // children
1.55 +
1.56 + /** Return the number of layers in our child list.
1.57 + */
1.58 + int countChildren() const;
1.59 +
1.60 + /** Return the child at the specified index (starting at 0). This does not
1.61 + affect the reference count of the child.
1.62 + */
1.63 + SkLayer* getChild(int index) const;
1.64 +
1.65 + /** Add this layer to our child list at the end (top-most), and ref() it.
1.66 + If it was already in another hierarchy, remove it from that list.
1.67 + Return the new child.
1.68 + */
1.69 + SkLayer* addChild(SkLayer* child);
1.70 +
1.71 + /** Remove this layer from its parent's list (or do nothing if it has no
1.72 + parent.) If it had a parent, then unref() is called.
1.73 + */
1.74 + void detachFromParent();
1.75 +
1.76 + /** Remove, and unref(), all of the layers in our child list.
1.77 + */
1.78 + void removeChildren();
1.79 +
1.80 + /** Return our parent layer, or NULL if we have none.
1.81 + */
1.82 + SkLayer* getParent() const { return fParent; }
1.83 +
1.84 + /** Return the root layer in this hiearchy. If this layer is the root
1.85 + (i.e. has no parent), then this returns itself.
1.86 + */
1.87 + SkLayer* getRootLayer() const;
1.88 +
1.89 + // coordinate system transformations
1.90 +
1.91 + /** Return, in matrix, the matix transfomations that are applied locally
1.92 + when this layer draws (i.e. its position and matrix/anchorPoint).
1.93 + This does not include the childrenMatrix, since that is only applied
1.94 + after this layer draws (but before its children draw).
1.95 + */
1.96 + void getLocalTransform(SkMatrix* matrix) const;
1.97 +
1.98 + /** Return, in matrix, the concatenation of transforms that are applied
1.99 + from this layer's root parent to the layer itself.
1.100 + This is the matrix that is applied to the layer during drawing.
1.101 + */
1.102 + void localToGlobal(SkMatrix* matrix) const;
1.103 +
1.104 + // paint method
1.105 +
1.106 + void draw(SkCanvas*, SkScalar opacity);
1.107 + void draw(SkCanvas* canvas) {
1.108 + this->draw(canvas, SK_Scalar1);
1.109 + }
1.110 +
1.111 +protected:
1.112 + virtual void onDraw(SkCanvas*, SkScalar opacity);
1.113 +
1.114 +private:
1.115 + enum Flags {
1.116 + kInheritFromRootTransform_Flag = 0x01
1.117 + };
1.118 +
1.119 + SkLayer* fParent;
1.120 + SkScalar m_opacity;
1.121 + SkSize m_size;
1.122 + SkPoint m_position;
1.123 + SkPoint m_anchorPoint;
1.124 + SkMatrix fMatrix;
1.125 + SkMatrix fChildrenMatrix;
1.126 + uint32_t fFlags;
1.127 +
1.128 + SkTDArray<SkLayer*> m_children;
1.129 +
1.130 + typedef SkRefCnt INHERITED;
1.131 +};
1.132 +
1.133 +#endif
