a22e2117e4
http://codereview.appspot.com/6453127/ git-svn-id: http://skia.googlecode.com/svn/trunk@5123 2bbb7eff-a529-9590-31e7-b0007b416f81
131 lines
3.7 KiB
C++
131 lines
3.7 KiB
C++
|
|
/*
|
|
* Copyright 2010 The Android Open Source Project
|
|
*
|
|
* Use of this source code is governed by a BSD-style license that can be
|
|
* found in the LICENSE file.
|
|
*/
|
|
|
|
|
|
#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:
|
|
SK_DECLARE_INST_COUNT(SkLayer)
|
|
|
|
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
|