73 lines
2.3 KiB
C++
73 lines
2.3 KiB
C++
/*
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* Copyright (C) 2006 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 SkBounder_DEFINED
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#define SkBounder_DEFINED
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#include "SkTypes.h"
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#include "SkRefCnt.h"
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struct SkIRect;
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struct SkPoint;
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struct SkRect;
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class SkPaint;
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class SkPath;
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class SkRegion;
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/** \class SkBounder
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Base class for intercepting the device bounds of shapes before they are drawn.
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Install a subclass of this in your canvas.
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*/
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class SkBounder : public SkRefCnt {
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public:
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/* Call to perform a clip test before calling onIRect.
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Returns the result from onIRect.
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*/
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bool doIRect(const SkIRect&);
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protected:
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/** Override in your subclass. This is called with the device bounds of an
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object (text, geometry, image) just before it is drawn. If your method
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returns false, the drawing for that shape is aborted. If your method
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returns true, drawing continues. The bounds your method receives have already
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been transformed in to device coordinates, and clipped to the current clip.
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*/
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virtual bool onIRect(const SkIRect&) = 0;
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/** Called after each shape has been drawn. The default implementation does
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nothing, but your override could use this notification to signal itself
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that the offscreen being rendered into needs to be updated to the screen.
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*/
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virtual void commit();
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private:
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bool doHairline(const SkPoint&, const SkPoint&, const SkPaint&);
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bool doRect(const SkRect&, const SkPaint&);
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bool doPath(const SkPath&, const SkPaint&, bool doFill);
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void setClip(const SkRegion* clip) { fClip = clip; }
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const SkRegion* fClip;
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friend class SkAutoBounderCommit;
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friend class SkDraw;
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friend class SkDrawIter;
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friend struct Draw1Glyph;
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friend class SkMaskFilter;
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};
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#endif
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