/*

 * Copyright 2014 Google Inc.

 *

 * Use of this source code is governed by a BSD-style license that can be

 * found in the LICENSE file.

 */

#ifndef SkBBHFactory_DEFINED

#define SkBBHFactory_DEFINED

#include "include/core/SkRect.h"

#include "include/core/SkRefCnt.h"

#include "include/core/SkTypes.h"

#include <vector>

class SkBBoxHierarchy : public SkRefCnt {

public:

    struct Metadata {

        bool isDraw;  // The corresponding SkRect bounds a draw command, not a pure state change.

    };

    /**

     * Insert N bounding boxes into the hierarchy.

     */

    virtual void insert(const SkRect[], int N) = 0;

    virtual void insert(const SkRect[], const Metadata[], int N);

    /**

     * Populate results with the indices of bounding boxes intersecting that query.

     */

    virtual void search(const SkRect& query, std::vector<int>* results) const = 0;

    /**

     * Return approximate size in memory of *this.

     */

    virtual size_t bytesUsed() const = 0;

protected:

    SkBBoxHierarchy() = default;

    SkBBoxHierarchy(const SkBBoxHierarchy&) = delete;

    SkBBoxHierarchy& operator=(const SkBBoxHierarchy&) = delete;

};

class SK_API SkBBHFactory {

public:

    /**

     *  Allocate a new SkBBoxHierarchy. Return NULL on failure.

     */

    virtual sk_sp<SkBBoxHierarchy> operator()() const = 0;

    virtual ~SkBBHFactory() {}

protected:

    SkBBHFactory() = default;

    SkBBHFactory(const SkBBHFactory&) = delete;

    SkBBHFactory& operator=(const SkBBHFactory&) = delete;

};

class SK_API SkRTreeFactory : public SkBBHFactory {

public:

    sk_sp<SkBBoxHierarchy> operator()() const override;

};

#endif