812b6f59fa
git-svn-id: http://skia.googlecode.com/svn/trunk@8001 2bbb7eff-a529-9590-31e7-b0007b416f81
90 lines
2.1 KiB
C++
90 lines
2.1 KiB
C++
/*
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* Copyright 2012 Google Inc.
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#ifndef SkAnnotation_DEFINED
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#define SkAnnotation_DEFINED
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#include "SkFlattenable.h"
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class SkData;
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class SkDataSet;
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class SkStream;
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class SkWStream;
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/**
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* Experimental class for annotating draws. Do not use directly yet.
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* Use helper functions at the bottom of this file for now.
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*/
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class SkAnnotation : public SkFlattenable {
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public:
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enum Flags {
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// If set, the associated drawing primitive should not be drawn
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kNoDraw_Flag = 1 << 0,
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};
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SkAnnotation(SkDataSet*, uint32_t flags);
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virtual ~SkAnnotation();
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uint32_t getFlags() const { return fFlags; }
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SkDataSet* getDataSet() const { return fDataSet; }
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bool isNoDraw() const { return SkToBool(fFlags & kNoDraw_Flag); }
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/**
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* Helper for search the annotation's dataset.
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*/
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SkData* find(const char name[]) const;
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SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkAnnotation)
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protected:
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SkAnnotation(SkFlattenableReadBuffer&);
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virtual void flatten(SkFlattenableWriteBuffer&) const SK_OVERRIDE;
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private:
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SkDataSet* fDataSet;
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uint32_t fFlags;
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void writeToStream(SkWStream*) const;
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void readFromStream(SkStream*);
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typedef SkFlattenable INHERITED;
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};
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/**
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* Experimental collection of predefined Keys into the Annotation dictionary
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*/
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class SkAnnotationKeys {
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public:
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/**
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* Returns the canonical key whose payload is a URL
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*/
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static const char* URL_Key();
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};
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///////////////////////////////////////////////////////////////////////////////
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//
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// Experimental helper functions to use Annotations
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//
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struct SkRect;
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class SkCanvas;
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/**
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* Experimental!
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*
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* Annotate the canvas by associating the specified URL with the
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* specified rectangle (in local coordinates, just like drawRect). If the
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* backend of this canvas does not support annotations, this call is
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* safely ignored.
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*
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* The caller is responsible for managing its ownership of the SkData.
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*/
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SK_API void SkAnnotateRectWithURL(SkCanvas*, const SkRect&, SkData*);
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#endif
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