c921843d85
- #if of something that was not defined - explicit constructor call for baseclass in copy-constructor of subclass http://code.google.com/p/skia/issues/detail?id=112 git-svn-id: http://skia.googlecode.com/svn/trunk@727 2bbb7eff-a529-9590-31e7-b0007b416f81
136 lines
4.1 KiB
C++
136 lines
4.1 KiB
C++
/*
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* Copyright (C) 2010 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef SkLayer_DEFINED
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#define SkLayer_DEFINED
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#include "SkRefCnt.h"
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#include "SkTDArray.h"
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#include "SkColor.h"
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#include "SkMatrix.h"
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#include "SkPoint.h"
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#include "SkRect.h"
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#include "SkSize.h"
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class SkCanvas;
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class SkLayer : public SkRefCnt {
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public:
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SkLayer();
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SkLayer(const SkLayer&);
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virtual ~SkLayer();
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bool isInheritFromRootTransform() const;
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SkScalar getOpacity() const { return m_opacity; }
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const SkSize& getSize() const { return m_size; }
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const SkPoint& getPosition() const { return m_position; }
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const SkPoint& getAnchorPoint() const { return m_anchorPoint; }
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const SkMatrix& getMatrix() const { return fMatrix; }
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const SkMatrix& getChildrenMatrix() const { return fChildrenMatrix; }
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SkScalar getWidth() const { return m_size.width(); }
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SkScalar getHeight() const { return m_size.height(); }
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void setInheritFromRootTransform(bool);
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void setOpacity(SkScalar opacity) { m_opacity = opacity; }
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void setSize(SkScalar w, SkScalar h) { m_size.set(w, h); }
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void setPosition(SkScalar x, SkScalar y) { m_position.set(x, y); }
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void setAnchorPoint(SkScalar x, SkScalar y) { m_anchorPoint.set(x, y); }
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void setMatrix(const SkMatrix&);
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void setChildrenMatrix(const SkMatrix&);
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// children
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/** Return the number of layers in our child list.
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*/
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int countChildren() const;
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/** Return the child at the specified index (starting at 0). This does not
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affect the reference count of the child.
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*/
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SkLayer* getChild(int index) const;
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/** Add this layer to our child list at the end (top-most), and ref() it.
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If it was already in another hierarchy, remove it from that list.
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Return the new child.
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*/
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SkLayer* addChild(SkLayer* child);
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/** Remove this layer from its parent's list (or do nothing if it has no
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parent.) If it had a parent, then unref() is called.
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*/
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void detachFromParent();
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/** Remove, and unref(), all of the layers in our child list.
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*/
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void removeChildren();
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/** Return our parent layer, or NULL if we have none.
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*/
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SkLayer* getParent() const { return fParent; }
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/** Return the root layer in this hiearchy. If this layer is the root
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(i.e. has no parent), then this returns itself.
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*/
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SkLayer* getRootLayer() const;
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// coordinate system transformations
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/** Return, in matrix, the matix transfomations that are applied locally
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when this layer draws (i.e. its position and matrix/anchorPoint).
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This does not include the childrenMatrix, since that is only applied
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after this layer draws (but before its children draw).
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*/
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void getLocalTransform(SkMatrix* matrix) const;
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/** Return, in matrix, the concatenation of transforms that are applied
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from this layer's root parent to the layer itself.
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This is the matrix that is applied to the layer during drawing.
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*/
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void localToGlobal(SkMatrix* matrix) const;
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// paint method
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void draw(SkCanvas*, SkScalar opacity);
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void draw(SkCanvas* canvas) {
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this->draw(canvas, SK_Scalar1);
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}
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protected:
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virtual void onDraw(SkCanvas*, SkScalar opacity);
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private:
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enum Flags {
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kInheritFromRootTransform_Flag = 0x01
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};
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SkLayer* fParent;
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SkScalar m_opacity;
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SkSize m_size;
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SkPoint m_position;
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SkPoint m_anchorPoint;
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SkMatrix fMatrix;
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SkMatrix fChildrenMatrix;
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uint32_t fFlags;
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SkTDArray<SkLayer*> m_children;
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typedef SkRefCnt INHERITED;
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};
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#endif
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