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